JP2007270122A - Resin dispersion, coating and laminate, and manufacturing method for the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an aqueous dispersion of a resin that has a small particle diameter, has stability, and is suppressed in bleeding out, and is useful as a surface reatment agent, adhesive, coatings, etc. for a polyolefin based substrate. <P>SOLUTION: The resin dispersion is obtained by binding a propylene-α-olefin copolymer (A), which is a copolymer of propylene and an α-olefin other than propylene, with a hydrophilic polymer (B) or by dispersing a polymer (C) being bonded with an acid group, with a 50% particle diameter of ≤0.5 μm, into water, wherein the propylene content of the copolymer (A) is ≥50 mol% and ≤100 mol%, a weight-average molecular weight Mw of the copolymer (A) is ≥10,000 having a molecular weight distribution Mw/Mn of ≤3.5, and the content of surfactant in the resin dispersion is ≤15 pts.wt. based on 100 pts.wt. of the polymer (C). The coatings, laminates, etc. are also provided using this resin dispersion. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an aqueous resin dispersion containing a propylene-based polymer, a paint and laminate containing the same, and a method for producing the same.

  Polyolefins such as propylene polymers and propylene-α-olefin copolymers are inexpensive and have excellent mechanical properties, heat resistance, chemical resistance, water resistance, etc., so they are used in a wide range of fields. . However, such polyolefins generally have a low polarity because they do not have a polar group in the molecule, and it is difficult to paint and bond, and improvements have been desired. For this reason, various methods such as a method of chemically treating the surface of a polyolefin molded body with a chemical agent, a method of oxidizing the surface of the molded body by a technique such as corona discharge treatment, plasma treatment, or flame treatment have been tried. ing. However, these methods require special equipment and are not necessarily sufficient for improving paintability and adhesion.

  Therefore, as a device for imparting good paintability and adhesiveness to polyolefins such as propylene polymers by a relatively simple method, so-called chlorinated polypropylene, acid-modified propylene-α-olefin copolymers, and further acid-modified chlorine Polypropylene has been developed. Such a modified polyolefin is applied as a surface treatment agent, an adhesive, a paint or the like to the surface of the polyolefin molded body. The modified polyolefin is usually applied in the form of a solution of an organic solvent or a dispersion in water. In general, an aqueous dispersion is preferably used from the viewpoint of health and safety and reduction of environmental pollution.

As an example of such an aqueous dispersion, a resin dispersion (patent document 1) in which acid-modified chlorinated polypropylene is dispersed in water using a surfactant and a basic substance, or an acid-modified polyolefin is used as a surfactant and a base. There is a resin dispersion (Patent Document 2) in which water is dispersed in water using a chemical substance.
However, in these resin dispersions, it is necessary to add a large amount of a surfactant in order to reduce the dispersed particle size, and as a result, paints using such resin dispersions have poor water resistance and chemical resistance. There was a problem. In addition, after application, the surface active agent bleeds out to the surface of the coating, which may cause poor appearance. On the other hand, when the amount of the surfactant used is reduced, only a resin having a coarse dispersed particle diameter can be produced, which causes a problem in storage stability. In an emulsification system using a surfactant, it is difficult to satisfy all of these requirements, and further improvements have been desired. In Patent Document 1, chlorinated polypropylene having a relatively low melting point is used in order to ensure the dispersibility of the resin. However, from the viewpoint of preventing environmental pollution, it is desirable to reduce the amount of chlorine used.

As another example, there is a resin dispersion (Patent Document 3) in which a polymer obtained by block copolymerization of a functional segment with a polypropylene segment is dispersed in water (Patent Document 3), but the dispersed particle size of an ethylene copolymer or a polypropylene homopolymer is sufficient. It could not be said that it was fine, and the dispersion could not be made without using any surfactant, and further improvement was required.
Therefore, a polyolefin aqueous dispersion in which a polyolefin obtained by grafting a large amount of an unsaturated carboxylic acid on a propylene-α-olefin copolymer is dispersed in the presence of a base has been proposed (Patent Document 4). However, since a propylene-α-olefin copolymer whose molecular weight distribution is wide and whose copolymerizability is not controlled is used, it is dispersed at a temperature equal to or higher than the boiling point of water or solvent using a pressure vessel in order to make the dispersed particle diameter fine. A special method must be used.
An aqueous dispersion in which an anhydrous maleated chlorinated propylene-ethylene copolymer obtained by modifying a chlorinated propylene-ethylene copolymer with anhydrous maleate is dispersed in the presence of a base has been proposed (Patent Document 5). However, since the molecular weight of the raw material used is as extremely low as 6,500, it is inferior in adhesion to a polyolefin substrate, water resistance and chemical resistance.

  On the other hand, as the propylene-α-olefin copolymer used, a molecular arrangement with a narrow molecular weight distribution and a copolymerization sequence synthesized by a metallocene catalyst instead of the propylene-α-olefin copolymer synthesized by a Ziegler-Natta catalyst is used. The use of a randomly and uniformly arranged propylene-α-olefin copolymer has been proposed (Patent Document 5). It is described that an aqueous dispersion excellent in low-temperature heat sealability was obtained by this. However, the use of a surfactant is still indispensable, and problems such as bleed out due to the surfactant and poor chemical resistance remain in addition to the large particle size and poor stability.

Also, an aqueous dispersion using only a polypropylene having a stereoblock structure without using an α-olefin has been proposed (Patent Document 6), but the use of a surfactant is essential, and there are still problems such as bleed out. Remain.
JP-A-10-231402 Japanese Patent Laid-Open No. 6-256592 (US Pat. No. 5,534,577) JP 2001-288372 (US Publication No. 2003-055179) JP-A-2005-126482 JP-A-3-182534 JP 2000-344972 A JP 2004-002842 (US Publication No. 2005-124753)

  The present invention is a surface treatment agent that has a fine dispersed particle size, is stable, suppresses bleeding out due to a surfactant, has excellent chemical resistance and water resistance, and has excellent adhesion to an olefin polymer having crystallinity. An aqueous dispersion of a resin useful as an adhesive or a paint is provided. The present invention also provides a paint, a laminate, and a method for producing the same.

As a result of diligent investigations to achieve the above object, the present inventors have found that a polymer in which a hydrophilic polymer is bonded at a predetermined ratio or an acidic group is bonded to a propylene-α-olefin copolymer having specific properties. It was found that a resin dispersion having excellent characteristics can be obtained by dispersing the polymer in water together with a very small amount of surfactant without using a surfactant.
That is, the present invention comprises a propylene-α-olefin copolymer (A), which is a copolymer of propylene and an α-olefin other than propylene, with a hydrophilic polymer (B) bonded thereto or an acidic group. A resin dispersion obtained by dispersing a combined polymer (C) in water with a 50% particle diameter of 0.5 μm or less, wherein the propylene content of the copolymer (A) is 50 mol% or more and 100 mol% The weight average molecular weight Mw of the copolymer (A) is 10,000 or more and the molecular weight distribution Mw / Mn is 3.5 or less, and the surfactant content of the resin dispersion is the polymer (C). The resin dispersion is characterized by being 15 parts by weight or less with respect to 100 parts by weight.

The present invention also relates to a resin dispersion in which the copolymer (A) is produced using a single site catalyst.
The present invention also relates to a resin dispersion in which the copolymer (A) is a propylene-butene copolymer.
Furthermore, the present invention relates to a resin dispersion in which the copolymer (A) has a melting point Tm of 100 ° C. or less and a heat of crystal fusion ΔH of 60 J / g or less.
Furthermore, this invention relates to the resin dispersion from which 95% or more elutes a copolymer (A) at 60 degrees C or less in a temperature rising elution fractionation method.

The present invention also relates to a resin dispersion in which the copolymer (A) does not substantially contain chlorine.
The present invention further relates to a resin dispersion in which the polymer (C) is dispersed in water with a 50% particle size of 0.3 μm or less.
In the present invention, polymer (C) is copolymer (A), and hydrophilic polymer (B) is (A) :( B) = 100: 1 to 100: 500 (weight ratio). The present invention relates to a resin dispersion which is bonded or has an acidic group bonded thereto.

The present invention also relates to a resin dispersion in which a polymer (C) is obtained by bonding a hydrophilic polymer (B) to a copolymer (A).
The present invention also relates to a resin dispersion in which the polymer (C) is a graft copolymer in which a hydrophilic polymer (B) is graft-bonded to the copolymer (A).
The present invention also relates to a resin dispersion in which the polymer (C) is formed by bonding 0.01 to 5 mmol of the hydrophilic polymer (B) per 1 g of the copolymer (A).
The present invention also relates to a resin dispersion in which the hydrophilic polymer (B) is a polyether resin.

The present invention also relates to a resin dispersion in which the hydrophilic polymer (B) has one or more reactive groups per molecule.
The present invention also relates to a resin dispersion in which the hydrophilic polymer (B) has at least an amino group as a reactive group.
The present invention also relates to a resin dispersion substantially free of surfactant.

The present invention is also a method for producing a resin dispersion, wherein the polymer (C) is dispersed in water, and the surfactant content is 15 parts by weight or less with respect to 100 parts by weight of the polymer (C). The present invention relates to a method for producing a resin dispersion, in which a polymer (C), water, and a mixture of a solvent other than water are prepared, and then the solvent is removed from the mixture to obtain a resin dispersion.
The present invention is also a resin dispersion comprising a polymer (C), at least one resin (D) selected from the group consisting of an acrylic resin, a polyester resin, a polyurethane resin, and an epoxy resin, and water. The mass ratio of the polymer (A) and the resin (D) is 90:10 to 10:90, and the mass ratio of the total amount of the polymer (C) and the resin (D) to water is 5:95 to 60. 40, and the surfactant content is 15 parts by weight or less with respect to 100 parts by weight of the total amount of the polymer (C) and the resin (D).

The present invention also relates to a resin dispersion in which particles composed of a polymer (C) and particles composed of a resin (D) are each dispersed in water.
Furthermore, the present invention relates to a resin dispersion in which the resin dispersion further contains a pigment, and the mass ratio of the total amount of the polymer (C) and the resin (D) to the pigment is 100: 10 to 100: 400. .

  In the present invention, the polymer (C) and the resin (D) are dispersed in water, and the surfactant content is 15% by weight with respect to 100 parts by weight of the total amount of the polymer (C) and the resin (D). In order to obtain a resin dispersion having a part or less, a resin obtained by mixing a dispersion obtained by dispersing the polymer (C) in water and a dispersion obtained by dispersing the resin (D) in water, The present invention relates to a method for producing a dispersion.

The present invention also relates to a paint containing the resin dispersion.
The present invention further provides a propylene-α-olefin copolymer (A), which is a copolymer of propylene and an α-olefin other than propylene, on the thermoplastic resin molded product (F). ) A polymer (C) formed by bonding or an acid group bonded, the propylene content of the copolymer (A) is 50 mol% or more and less than 100 mol%, and the copolymer (A) A laminate having a resin layer having a weight average molecular weight Mw of 10,000 or more, a molecular weight distribution Mw / Mn of 3.5 or less, and a surfactant content of 15 parts by weight or less with respect to 100 parts by weight of the polymer (C). About the body.

Moreover, this invention relates to the laminated body by which the resin layer is formed by apply | coating the said resin dispersion or the said coating material to a thermoplastic resin molding (F), and heating.
The present invention also relates to a method for producing a laminate, in which the resin dispersion or the paint is applied to a thermoplastic resin molded body (F) and heated to form a resin layer.

  According to the present invention, since the polymer (C) is very excellent in dispersibility in water, there is an advantage that the dispersed particle diameter is fine, the particle size distribution can be narrowed, and the dispersion can be stably dispersed. Moreover, since it can disperse | distribute without adding a very small amount or surfactant substantially, there exists an advantage which can suppress the bleed-out by the surfactant which was a problem conventionally, and, by extension, the coated article of the outstanding external appearance is obtained. Therefore, aqueous dispersions can be used for applications that have been conventionally applied as organic solvent solutions, which is advantageous in terms of safety and hygiene. Further, since it is not an organic solvent solution, VOC (volatile organic chemical substance) emission can be reduced, which is advantageous from the environmental viewpoint. In addition, an aqueous dispersion having excellent properties can be obtained without substantially containing chlorine. When chlorine is not included, there are no problems such as dioxins or toxicity, which is very advantageous in terms of environment.

Furthermore, since the propylene-α-olefin copolymer (A) has higher solvent solubility and better water dispersibility than propylene homopolymers having the same degree of stereoregularity, and has a low melting point, resin dispersion using this copolymer The body has the advantage that the baking temperature after painting can be lowered.
According to the method for producing a resin dispersion of the present invention, an excellent aqueous resin dispersion having a fine dispersed particle diameter, a narrow particle size distribution, and stably dispersed resin particles can be easily obtained.

Furthermore, the coating film obtained by applying the paint containing the resin dispersion of the present invention is excellent in water resistance, moisture resistance, oil resistance (gasohol resistance) and chemical resistance. For this reason, it is finished by only one coating, and is suitable for a coating method using, for example, a solvent-based lacquer type paint.
The resulting coating film shows good adhesion to polyolefin materials or plastic materials containing polyolefin, etc., and is also formed on difficult-to-adhere base materials such as untreated polypropylene, which are usually difficult to paint or bond. Yes.

Further, if the polymer (C) in the resin dispersion of the present invention is used in combination with another resin to form a composite resin dispersion, the physical property value derived from the other resin is improved, specifically, the strength of the coating film, water resistance Property, weather resistance, abrasion resistance, solvent resistance, and the like can be improved.
Therefore, the resin dispersion of the present invention is extremely useful as a surface treatment agent, an adhesive, a coating agent, a paint and the like for a crystalline olefin polymer.

In addition, the laminate of the present invention is excellent in coating film adhesion and can be applied to a wide range of industrial products.
In the present invention, it is not always essential to exhibit all the effects, and it is only necessary to have one or more of the effects described above.

  The aqueous resin dispersion of the present invention (hereinafter sometimes referred to as “water dispersion”, “aqueous dispersion”, or “resin dispersion”) is a copolymer of propylene and an α-olefin other than propylene. The copolymer (A) having a propylene content of 50 mol% or more and less than 100 mol%, a weight average molecular weight Mw of 10,000 or more and a molecular weight distribution Mw / Mn of 3.5 or less is hydrophilic. A polymer (C) formed by bonding a polymer (B) or an acidic group is dispersed in water with a 50% particle size of 0.5 μm or less, and the surfactant content is a polymer. (C) 15 parts by weight or less with respect to 100 parts by weight. That is, since the polymer (C) in which a hydrophilic polymer is bonded to the specific olefin copolymer (A) or an acidic group is bonded is very excellent in water dispersibility, a surfactant is not used at all. By using a very small amount, an aqueous resin dispersion having a fine dispersed particle diameter, a narrow particle size distribution, and stably dispersed particles can be obtained.

In the present invention, the term “dispersion” is a concept including a state in which dispersed particles are extremely small and dispersed in a single molecule, and a state that can be said to be substantially dissolved.
This will be described in more detail below.
[1] Propylene-α-olefin copolymer (A)
The propylene-α-olefin copolymer (A) in the present invention (hereinafter also simply referred to as “copolymer (A)”) is a copolymer of propylene and an α-olefin other than propylene (hereinafter referred to as “copolymer (A)”). Simply referred to as “propylene-α-olefin copolymer”), the propylene content is 50 mol% or more and less than 100 mol%, the weight average molecular weight Mw is 10,000 or more, and the molecular weight distribution Mw / Mn is 3.5 or less.

  The copolymer (A) is not particularly limited as long as it is a copolymer of propylene and one or more α-olefin comonomers other than propylene. Examples of the α-olefin comonomer include ethylene, 1-butene, 1-pentene, 1-hexene, 1-heptene, 1-octene, cyclopentene, cyclohexene, and norbornene. The α-olefin comonomer is preferably an α-olefin comonomer having 2 to 6 carbon atoms, preferably ethylene or 1-butene (hereinafter sometimes simply referred to as “butene”), and particularly preferably 1-butene. As long as the effect of the present invention is not significantly impaired, another monomer other than the α-olefin may be further copolymerized. Furthermore, a chlorinated propylene polymer obtained by chlorinating these propylene polymers can also be used.

  Specific examples of the copolymer (A) include a propylene-ethylene copolymer, a propylene-butene copolymer, a propylene-hexene copolymer, a propylene-ethylene-butene copolymer, and a chlorinated propylene-ethylene copolymer. And chlorinated propylene-butene copolymer. Of these, propylene-ethylene copolymer, propylene-butene copolymer, chlorinated propylene-ethylene copolymer, or chlorinated propylene-butene copolymer is preferable, and propylene-ethylene copolymer or propylene-butene copolymer is preferable. More preferred are polymers, and even more preferred are propylene-butene copolymers. Commercially available products include Wintech series (Nippon Polypro), Tuffmer XM series (Mitsui Chemicals), Ricosen PP series (Clariant), and part of Super Clon series (Nippon Paper Chemicals) ), A part of the Hardren series (manufactured by Toyo Kasei Kogyo Co., Ltd.).

The propylene content of the copolymer (A) can vary in relation to the type of α-olefin comonomer, stereoregularity, chlorination degree, etc., but is approximately as follows.
The propylene content of the propylene-α-olefin copolymer (A) in the present invention is 50 mol% or more. Usually, the higher the propylene content, the higher the adhesion to the polypropylene substrate. The propylene content is preferably 60 mol% or more, more preferably 70 mol% or more. However, the propylene content is less than 100%. Usually, when the propylene content is lowered, the melting point of the copolymer can be lowered, and for example, there is an advantage that the baking temperature after coating can be lowered.

Of these, a propylene-butene copolymer having a propylene content of 70 mol% or more and less than 100 mol% and a 1-butene content of 30 mol% or less is preferred.
The copolymer (A) may be a random copolymer or a block copolymer, but is preferably a random copolymer. If it is a random copolymer, the melting point of the copolymer can be lowered more effectively. The copolymer (A) may be linear or branched.

  When a chlorinated propylene-α-olefin copolymer is used, the degree of chlorination is usually 25% by weight or less, preferably 20% by weight or less, more preferably 10% by weight or less. As the degree of chlorination increases, the polarity of the polymer increases, the affinity with polyolefin tends to decrease, and the adhesion tends to decrease. Accordingly, a lower chlorination degree is preferable. For the purpose of reducing the environmental load, it is desirable that the copolymer (A) does not substantially contain chlorine. “Substantially free of chlorine” means, for example, that the degree of chlorination is less than 5% by weight.

  As the stereoregularity of the propylene-α-olefin copolymer, those having an isotactic structure in whole or in part are preferable. For example, not only a normal isotactic propylene-α-olefin copolymer but also an isotactic block polypropylene or a stereo described in JP-A No. 2003-231714 and US Pat. No. 4,522,982 can be used. A copolymer obtained by copolymerizing an α-olefin comonomer with block polypropylene or the like can also be used.

The copolymer (A) has a weight average molecular weight Mw measured by GPC (Gel Permeation Chromatography) and converted by a calibration curve of each polyolefin of 10,000 or more. If Mw is less than 10,000, the stickiness is large and the adhesion to the substrate is insufficient. A more preferable value of the lower limit value of Mw is 15,000, a more preferable value is 30,000, and particularly preferably 50,000. As Mw is higher than the lower limit value, the degree of stickiness decreases, and the oil resistance (gasohol resistance) and chemical resistance increase, making it easier to use as a paint.
The weight average molecular weight Mw is preferably 500,000 or less. A more preferable value of the upper limit value of Mw is 300,000, more preferably 250,000, and particularly preferably 200,000. As the Mw is lower than the upper limit, the viscosity tends to be low and the resin dispersion tends to be easily prepared. In addition, GPC measurement can be performed by a conventionally well-known method using ortho dichlorobenzene etc. as a solvent using a commercially available apparatus.

  The copolymer (A) in the present invention has a molecular weight distribution Mw / Mn represented by a ratio of the weight average molecular weight Mw and the number average molecular weight Mn of 3.5 or less. This means that the molecular weight distribution is narrow and the molecular weight of the copolymer is uniform. By using such a copolymer (A), it becomes easy to control the particle size during dispersion in water, and a resin dispersion in which the dispersed particle size is small, the particle size distribution is narrow, and is stably dispersed is obtained. There are advantages to being Mw / Mn is preferably 3.0 or less, and usually 1.0 or more.

  The copolymer (A) preferably has a melting point Tm of 100 ° C. or lower. More preferably, it is 90 degrees C or less. It is preferable that the melting point Tm is lower than 100 ° C. because the crystallinity is low and the solubility in a solvent is improved, and the emulsification / dispersion work is easily performed at low temperature. In addition, when this resin dispersion is used, for example, as a paint or an adhesive, it is advantageous in that it melts at a low baking temperature. However, the melting point Tm of the copolymer (A) is usually 25 ° C. or higher, preferably 35 ° C. or higher. This is because the layer obtained from the resin dispersion of the present invention is advantageous in terms of high heat resistance, high hardness, non-stickiness, and the like.

  The copolymer (A) preferably has a heat of crystal fusion ΔH of 60 J / g or less, more preferably 50 J / g or less. It is preferable that ΔH is smaller than 60 J / g because the crystallinity is low and the solubility in a solvent is improved, and the emulsification / dispersion work is easily performed at a low temperature. ΔH is usually 0 J / g or more, but is preferably 10 J / g or more from the viewpoint of adhesion. If it is 10 J / g or more, there is an advantage that cohesive failure is difficult. ΔH is more preferably 20 J / g or more, and further preferably 30 J / g or more.

Moreover, it is preferable that 95 weight% or more elutes a copolymer (A) at 60 degrees C or less in the temperature rising elution fractionation method (Temperature Rising Elution Fractionation: TREF). By setting it to 95% or more, the emulsifying property of the molecule is improved, and it becomes difficult to precipitate as an aggregate during emulsification. If the aggregates are deposited, not only the yield is deteriorated, but also the filter is clogged during filtration. Further, the component eluting at 20 ° C. or less is preferably 20% or less, more preferably 10% or less, and more preferably 5% or less. Moreover, the component which elutes preferably at 30 degrees C or less is 20% or less, More preferably, it is 10% or less. The smaller the components that elute at 20 ° C. or 30 ° C. or less, the better the chemical resistance such as adhesion at room temperature or warming, and beef tallow resistance and gasohol resistance.
More preferably, 97% by weight or more is eluted. As the solvent, orthodichlorobenzene is usually used. Elevated temperature elution fractionation is a method for fractionating polymers using the difference in dissolution temperature, and is an effective analysis method for analyzing structural heterogeneity related to polyolefin crystallinity, such as comonomer concentration in the polymer. .

  In TREF, a sample dissolved in a solvent at a high temperature is first injected into a column filled with glass beads at the same temperature, and cooled at a constant temperature to crystallize the polymer component, thereby holding the polymer in a form deposited on the bead surface. . Next, when the temperature of the column is raised stepwise, the polymer component having a low crystallinity is eluted and reaches the detector to be detected. As the column temperature rises, components with higher crystallinity elute in order. In this way, the polymer composition distribution and the like can be measured from the elution temperature and the elution amount. There is also a method of measurement using cross fraction chromatography (CFC) in which GPC is combined with TREF.

A copolymer (A) may be used individually by 1 type, and may be used in combination of 2 or more type.
Moreover, unless the effect of this invention is impaired remarkably, you may use other polyolefins, such as a polypropylene homopolymer and a polyethylene homopolymer, together with a copolymer (A). When used in combination, polypropylene is preferred. Polypropylene may be chlorinated. Of these, polypropylene having an isotactic structure in whole or in part is preferable. For example, not only ordinary isotactic polypropylene but also isotactic block polypropylene, stereo block polypropylene, etc. as described in JP-A-2003-231714 and US Pat. No. 4,522,982 can be used. . A stereoblock polypropylene having an isotactic block and an atactic block is preferred. The [mmmm] pentad exhibiting isotactic stereoregularity is more preferably in the range of 10% to 90%. The pentad is preferably 20% or more, more preferably 30% or more, and still more preferably 40% or more. The pentad is preferably 80% or less, more preferably 70% or less, still more preferably 60% or less, and particularly preferably 55% or less. The method described in JP-A-2003-231714 can be used as the method for measuring the pentad ratio. There is a tendency that the degree of stickiness becomes smaller as the value is lower than the lower limit, and the degree of crystallinity becomes lower and the preparation of the resin dispersion tends to become easier as the value is lower than the upper limit. When other polyolefins are used in combination, 5% by weight or more in the total polyolefin is preferably the copolymer (A), more preferably 10% by weight or more, and further preferably 15% by weight or more.

When two or more kinds of copolymers (A) are combined, the values of propylene content, chlorination degree, molecular weight distribution, and the like are assumed to be weight average values of individual polymer values.
About the manufacturing method of the copolymer (A) of this invention, if the polymer which satisfy | fills the requirements of this invention can be manufactured, it will not specifically limit, What kind of manufacturing method may be sufficient. For example, radical polymerization, cationic polymerization, anionic polymerization, coordination polymerization and the like may be mentioned, and each may be living polymerization.

In the case of coordination polymerization, for example, a polymerization method using a Ziegler-Natta catalyst or a polymerization method using a single site catalyst or a Kaminsky catalyst can be used. A preferable production method includes a production method using a single site catalyst. The reason for this is that single-site catalysts are generally easy to control the reaction precisely due to the ligand design, and polymers with sharp molecular weight distribution and stereoregularity distribution can be obtained, compared with single-site polymers compared with Ziegler-Natta catalyst polymers. This is because since the melting point of the polymer by the catalyst is low, the resin dispersion using this polymer can lower the baking temperature after coating. As the single site catalyst, for example, a metallocene catalyst or a Brookhart catalyst can be used. As the metallocene catalyst, a preferable catalyst may be selected in accordance with the stereoregularity of the polyolefin to be polymerized, such as a C ₁ symmetric type, a C ₂ symmetric type, a C _2V symmetric type, and a C _S symmetric type. It is preferable to use a C ₁ symmetric type or C ₂ symmetric type metallocene catalyst.

  The polymerization may be any polymerization form such as solution polymerization, slurry polymerization, bulk polymerization, and gas phase polymerization. In the case of solution polymerization or slurry polymerization, examples of the solvent include aromatic hydrocarbons such as toluene and xylene; aliphatic hydrocarbons such as hexane, octane and decane; alicyclic aliphatic carbonization such as cyclohexane and methylcyclohexane. Hydrogen; halogenated hydrocarbons such as methylene chloride, carbon tetrachloride, chlorobenzene; esters such as methyl acetate, ethyl acetate, propyl acetate, and butyl acetate; ketones such as acetone, methyl ethyl ketone, methyl isobutyl ketone, and cyclohexanone; methanol, Examples include alcohols such as ethanol, n-propanol, isopropanol, and n-butanol; ethers such as dibutyl ether and tetrahydrofuran; and polar solvents such as dimethylformamide and dimethyl sulfoxide. Among these, aromatic hydrocarbons, aliphatic hydrocarbons, or alicyclic hydrocarbons are preferable, and toluene, xylene, hexane, heptane, cyclopentane, or cyclohexane is preferable. These may be used individually by 1 type and may be used in combination of 2 or more type.

[2] Polymer (C1) formed by binding an acidic group to propylene-α-olefin copolymer (A)
The acidic group in the present invention refers to an electron pair accepting group is not particularly limited, for example, a carboxylic acid group (-COOH), a sulfo group (-SO ₃ H), sulfino group (-SO ₂ H), phosphono Group (—PO ₂ H) and the like. Of these, a carboxyl group is preferred. The carboxylic acid group may be in a dicarboxylic anhydride group (—CO—O—OC—) before being dispersed in water. Examples of the carboxylic acid group include a (meth) acrylic acid group, a fumaric acid group, a maleic acid group or an anhydride group thereof, an itaconic acid group or an anhydride group thereof, and a crotonic acid group.

  The binding amount of the acidic group is preferably in the range of 0.4 to 5 mmol, ie 0.4 to 5 mmol / g, per 1 g of the copolymer (A). A more preferred lower limit is 0.6 mmol / g, and a more preferred lower limit is 0.8 mmol / g. On the other hand, a more preferable upper limit is 3 mmol / g, a further preferable upper limit is 1.6 mmol / g, and a still more preferable upper limit is 1.2 mmol / g. As the amount of bonding is higher than the lower limit, the polarity of the polymer (C1) increases and the hydrophilicity increases, so the dispersed particle size tends to decrease. The lower the upper limit, the higher the adhesion to the crystalline polyolefin as the substrate. It tends to increase. In addition, since it can be considered that the dicarboxylic acid anhydride group contains two carboxylic acid groups in the group, 1 mol of the dicarboxylic acid anhydride group is counted as 2 mols of the acidic group.

  About the manufacturing method of a polymer (C1), it is the same as that of the manufacturing method of the copolymer (A2) which a reactive group couple | bonds with the propylene-alpha-olefin copolymer (A) mentioned later in [3-1]. The method can be used.

[3] Polymer (C2) formed by bonding hydrophilic polymer (B) to propylene-α-olefin copolymer (A)
The ratio of the copolymer (A) to the hydrophilic polymer (B) is preferably (A) :( B) = 100: 1 to 100: 500 (parts by weight). (A) By making (B) 1 part by weight or more with respect to 100 parts by weight, the dispersibility of the polymer (C2) in water is increased, and the dispersed particle size is reduced without causing aggregation or separation. Can do. Moreover, adhesiveness with a polyolefin base material can be improved by making (B) 500 parts by weight or less with respect to (A) 100 parts by weight. Especially, (A) :( B) = 100: 5 to 100: 500 (parts by weight) is more preferable.

  As a method for producing a polymer (C2) in which a hydrophilic polymer (B) is bonded to a propylene-α-olefin copolymer (A), a hydrophilic monomer is usually polymerized in the presence of the copolymer (A). The method (R1) for forming the hydrophilic polymer (B) bonded to the copolymer (A) or the previously polymerized hydrophilic polymer (B) into the propylene-α-olefin copolymer (A) The bonding method (R2) may be mentioned, and it may be appropriately selected according to the type and combination of the propylene-α-olefin copolymer and the hydrophilic polymer, the characteristics of the target polymer (C2), and the like. Alternatively, the hydrophilic polymer (B) may be directly bonded to the copolymer (A), or a polymer (A2) in which a reactive group is bonded to the copolymer (A) described below, The hydrophilic polymer (B) may be bonded to this.

[3-1] A copolymer (A2) in which a reactive group is bonded to a propylene-α-olefin copolymer (A).
Examples of the propylene-α-olefin copolymer (A2) having a reactive group include a copolymer obtained by copolymerizing an unsaturated compound having no reactive group and an unsaturated compound having a reactive group at the time of polymerization ( A2a), a polymer (A2b) obtained by graft polymerization of a radically polymerizable unsaturated compound having a reactive group onto a propylene-α-olefin copolymer (A), or a propylene-α-olefin copolymer having an unsaturated end group A polymer (A2c) obtained by converting a polymer into an element group of group 13 to group 17 can be used.

  The copolymer (A2a) is obtained by copolymerizing an unsaturated compound having no reactive group and an unsaturated compound having a reactive group, and the unsaturated compound having a reactive group is inserted into the main chain. Copolymer. For example, it can be obtained by copolymerizing an α-olefin such as ethylene, propylene, or butene with an α, β-unsaturated carboxylic acid such as acrylic acid or maleic anhydride or an anhydride thereof. As the copolymer (A2a), for example, a propylene-butene-maleic anhydride copolymer can be used. These may be used individually by 1 type and may be used in combination of 2 or more type. As the manufacturing method, the method described in [1] can be similarly used.

  The polymer (A2b) is obtained by graft-polymerizing a prepolymerized propylene-α-olefin copolymer with a radically polymerizable unsaturated compound having a reactive group, and the unsaturated compound having a reactive group is a main chain. It is grafted on. For example, polyolefins such as polyethylene and polypropylene, (meth) acrylic acid, fumaric acid, maleic acid or its anhydride, itaconic acid or its anhydride, crotonic acid, (meth) acrylic acid-2-hydroxyethyl, (meth) A polymer grafted with 2-hydroxypropyl acrylate, (meth) acrylamide, (dimethylamino) ethyl (meth) acrylate, glycidyl (meth) acrylate, or (2-isocyanato) ethyl (meth) acrylate is there. These may be used individually by 1 type and may be used in combination of 2 or more type. In addition, (meth) acrylic acid is a general term for acrylic acid and methacrylic acid, and others are based on this.

As the propylene-α-olefin copolymer of this reaction, the above-mentioned copolymer (A) can be used.
Examples of the polymer (A2b) include maleic anhydride-modified polypropylene and its chlorinated product, maleic anhydride-modified propylene-ethylene copolymer or its chlorinated product, maleic anhydride-modified propylene-butene copolymer, and acrylic acid-modified propylene-ethylene. Examples thereof include a copolymer or a chlorinated product thereof, and an acrylic acid-modified propylene-butene copolymer. These may be used individually by 1 type and may be used in combination of 2 or more type.

  The radical polymerization initiator used for graft polymerization can be appropriately selected from ordinary radical polymerization initiators, and examples thereof include organic peroxides and azonitriles. Examples of organic peroxides include peroxyketals such as di (t-butylperoxy) cyclohexane, hydroperoxides such as cumene hydroperoxide, dialkyl peroxides such as di (t-butyl) peroxide, and benzoyl peroxide. Diacyl peroxides such as oxide, or peroxyesters such as t-butyl peroxyisopropyl monocarbonate can be used. Examples of the azonitrile include azobisbutyronitrile and azobisisopropylnitrile. Of these, benzoyl peroxide or t-butylperoxyisopropyl monocarbonate is particularly preferred. These may be used individually by 1 type and may be used in combination of 2 or more type.

The use ratio of the radical polymerization initiator and the graft copolymer unit is usually in the range of radical polymerization initiator: graft copolymer unit = 1: 100 to 2: 1 (molar ratio). Preferably it is the range of 1: 20-1: 1.
The reaction temperature is usually 50 ° C. or higher, preferably in the range of 80 to 200 ° C. The reaction time is usually about 2 to 20 hours.

About the manufacturing method of a polymer (A2b), if the polymer which satisfy | fills the requirements of this invention can be manufactured, it will not specifically limit, Any manufacturing method may be sufficient. Examples thereof include a method of reacting by heating and stirring in a solution, a method of reacting by melting and heating without solvent, and a method of reacting by heating and kneading with an extruder. As a solvent in the case of producing in a solution, the solvents mentioned in [1] can be used similarly.
These methods may be used alone or in combination of two or more. For example, after being melt-modified, it can be further modified in a solution.
Among these, melt modification is preferable in that it can reduce the molecular weight and reduce the molecular weight, and when high molecular weight propylene-α-olefin is used, it can be easily emulsified by lowering the molecular weight.

  As the polymer (A2c), for example, as described in JP-A-2001-288372, a double bond portion of a propylene-α-olefin copolymer having a terminal double bond is a boron group or an aluminum group. A propylene-α-olefin copolymer (A2c1) converted into a group 13 element group or a propylene-α-olefin copolymer having a terminal double bond as described in JP-A-2005-48172. Double bond part of propylene-α-olefin copolymer (A2c2) in which a heavy bond part is converted to a halogen element, or a propylene-based polymer having a terminal double bond as described in JP-A-2001-98140 A propylene-α-olefin copolymer (A2c3) in which is converted to a mercapto group can be used.

Examples of the method for producing a propylene-α-olefin copolymer having a double bond include a method of causing α-hydrogen elimination during olefin polymerization and a method of thermally decomposing a propylene-based polymer at a high temperature.
Examples of the method for converting the double bond portion into a boron group or an aluminum group include a method in which an organic boron compound or an organic aluminum compound is reacted with a double bond in a solvent.

As a method for converting the double bond portion into a halogen element, for example, a propylene group having a hydroxyl group by reacting a propylene-α-olefin copolymer (A2c1) having an organoboron group with a base and hydrogen peroxide solution. There is a method in which after conversion to a polymer, a halogen group-containing acid halide is reacted to convert it into a halogen group-containing ester group.
As a method for converting the double bond portion into a mercapto group, for example, there is a method in which a propylene polymer having a terminal double bond is reacted with thioacetic acid in the presence of a radical polymerization initiator and then treated with a base.

The production method of the polymer (A2c) is not particularly limited as long as a polymer satisfying the requirements of the present invention can be produced. Any production method may be used, but a method of heating and stirring in a solution is preferably used. As a solvent in the case of producing in a solution, the solvents mentioned in [1] can be used similarly.
Regarding the copolymer (A2a), the copolymer (A2a) is regarded as the copolymer (A), and the propylene content and the molecular weight distribution Mw / Mn are measured.

Regarding the copolymer (A2b), the propylene content and the molecular weight distribution Mw / Mn are measured with respect to the copolymer (A) before graft polymerization of the radically polymerizable unsaturated compound having a reactive group. .
Regarding the copolymer (A2c), the propylene content and the molecular weight distribution Mw / Mn are measured for the copolymer (A) before the terminal double bond is converted.

  The content of the reactive group in the copolymers (A2a) and (A2b) obtained by bonding the reactive group should be in the range of 0.01 to 5 mmol, that is, 0.01 to 5 mmol / g per 1 g of polyolefin. Is preferred. A more preferred lower limit is 0.05 mmol / g, even more preferably 0.1 mmol / g, and particularly preferably 0.15 mmol / g. The upper limit value is more preferably 1 mmol / g, further preferably 0.8 mmol / g, and particularly preferably 0.5 mmol / g.

The content of the reactive group in the copolymer (A2c) obtained by bonding the reactive group is usually 1 reactive group or less per molecule of the polymer due to the production method, and 1 / number average molecular weight Mn (mol / g). It tends to be lower than those of the copolymers (A2a) and (A2b). Therefore, the reactive group content is preferably in the range of 0.004 to 0.35 mmol / g per gram of polyolefin. A more preferred lower limit is 0.005 mmol / g, while a more preferred upper limit is 0.2 mmol / g.
As the content of the reactive group is higher than the lower limit, the amount of the hydrophilic polymer (B) is increased and the hydrophilicity of the polymer (C) is increased, so that the dispersed particle size tends to be reduced. The lower the value, the higher the adhesion to the crystalline polyolefin as the substrate. In addition, since it can be considered that a dicarboxylic acid anhydride group contains two carboxylic acid groups in a group, 1 mol of dicarboxylic acid anhydride groups is counted as 2 mol of reactive groups.

The copolymer (A2) may be linear or branched. A copolymer (A2) may be used individually by 1 type, and may be used in combination of 2 or more type.
In the present invention, both the copolymer (A) itself and the copolymer (A2) formed by bonding a reactive group are combined with the hydrophilic polymer (B) or the desired polymer (C). It can be used appropriately according to the characteristics of However, it is preferable to include at least a copolymer (A2) formed by bonding a reactive group. In this case, there are advantages such as easy control of the binding amount of the hydrophilic polymer (B) and various reactions that can be used for binding. You may use only the copolymer (A2) formed by couple | bonding a reactive group.

Examples of the reactive group include a carboxylic acid group, a dicarboxylic anhydride group, or a dicarboxylic anhydride monoester group, a hydroxyl group, an amino group, an epoxy group, an isocyanate group, a mercapto group, and a halogen group. At least one selected from the group consisting of a carboxylic acid group, a dicarboxylic acid anhydride group, and a dicarboxylic acid anhydride monoester group is more preferable. These carboxylic acid groups and the like have high reactivity and are easy to bond with hydrophilic polymers, and many unsaturated compounds having these groups can be easily copolymerized or grafted onto polyolefins.
Any of the polymers (A2a), (A2b), and (A2c) can be used, but the polymer (A2b) is usually preferred. The polymer (A2b) has advantages such as easy control of the binding amount of the hydrophilic polymer (B).

[3-2] Hydrophilic polymer (B)
In the following, only the copolymer (A) will be described for simplification of explanation, but the same applies to the copolymer (A2).
In the present invention, the hydrophilic polymer means a polymer having an insoluble content of 1% by weight or less when dissolved in water at 25 ° C. at a concentration of 10% by weight. The hydrophilic polymer (B) is not particularly limited as long as the effects of the present invention are not significantly impaired, and any of synthetic polymers, semi-synthetic polymers, and natural polymers can be used. It may have a reactive group.
Although it does not specifically limit as a synthetic polymer, For example, a poly (meth) acrylic resin, polyether resin, polyvinyl alcohol resin, polyvinylpyrrolidone resin etc. can be used. Examples of natural polymers include, but are not limited to, starch such as corn starch wheat starch, candy starch, potato starch, tapioca starch, and rice starch; seaweed such as funori, agar, and sodium alginate; Sticky materials; animal proteins such as glue, casein and gelatin; fermented sticky materials such as pullulan and dextrin can be used. Although it does not specifically limit as semisynthetic polymer, For example, starch substances, such as carboxyl starch, cationic starch, and dextrin; Celluloses, such as viscose, methylcellulose, ethylcellulose, carboxylmethylcellulose, and hydroxyethylcellulose, etc. can be used.

  Among these, a synthetic polymer that can easily control the degree of hydrophilicity and has stable characteristics is preferable. An acrylic resin such as poly (meth) acrylic resin, polyvinyl alcohol resin, polyvinylpyrrolidone resin, or polyether resin is more preferable. These may be used individually by 1 type and may be used in combination of 2 or more type. Highly hydrophilic polyether resins are most preferred.

  The acrylic resin used as the hydrophilic polymer (B) in the present invention is usually obtained by polymerizing an unsaturated carboxylic acid or its ester or anhydride by radical polymerization, anionic polymerization, or cationic polymerization. The method for bonding with the copolymer (A) is not limited, but examples include radical polymerization in the presence of a propylene-α-olefin copolymer, hydroxyl group, amino group, glycidyl group, (anhydrous) carboxylic acid group, and the like. And a method of reacting an acrylic resin having a reactive group with a propylene-α-olefin copolymer having a reactive group.

As unsaturated carboxylic acid or its ester or anhydride showing hydrophilicity, (meth) acrylic acid, hydroxyethyl (meth) acrylate, dimethylaminoethyl (meth) acrylate (meth) acrylate dimethylaminoethyl quaternized product (Meth) acrylamide is a preferred example.
Moreover, a hydrophobic radically polymerizable compound can be copolymerized with the polymer (C) within a range showing hydrophilicity. Examples of the copolymerizable hydrophobic monomer include a (meth) acrylic acid ester monomer having an alkyl group having 1 to 12 carbon atoms, an aryl group or an arylalkyl group, and a hydrocarbon group having 1 to 12 carbon atoms. Examples thereof include polymerizable vinyl monomers.

  Examples of the (meth) acrylic acid ester-based monomer having an alkyl group having 1 to 12 carbon atoms include methyl (meth) acrylate, ethyl (meth) acrylate, (meth) acrylate-n-propyl, (meth) Isopropyl acrylate, n-butyl (meth) acrylate, isobutyl (meth) acrylate, t-butyl (meth) acrylate, hexyl (meth) acrylate, cyclohexyl (meth) acrylate, (meth) acrylic acid Examples include octyl, 2-ethylhexyl (meth) acrylate, nonyl (meth) acrylate, decyl (meth) acrylate, dodecyl (meth) acrylate, and the like.

Examples of the (meth) acrylic acid ester monomer having an aryl group or arylalkyl group having 1 to 12 carbon atoms include phenyl (meth) acrylate, toluyl (meth) acrylate, benzyl (meth) acrylate, and the like. It is done.
Examples of the polymerizable vinyl monomer having a hydrocarbon group having 1 to 12 carbon atoms include vinyl acetate and styrene monomer.

Preferred examples include (meth) acrylic acid esters such as methyl (meth) acrylate and butyl (meth) acrylate, and vinyl acetate.
Alternatively, there is a method in which a radically polymerizable unsaturated compound is polymerized in the presence of a radical polymerization initiator to form a polymer and bonded to the copolymer (A), and then modified to obtain a hydrophilic polymer (B). is there. For example, after polymerization of (meth) acrylic acid-t-butyl, a method of hydrolyzing under acidic conditions to modify to poly (meth) acrylic acid, a method of polymerizing vinyl acetate and then saponifying and modifying to polyvinyl alcohol, etc. . Examples of the copolymerizable hydrophobic monomer include (meth) acrylic acid esters such as methyl (meth) acrylate and butyl (meth) acrylate, and vinyl acetate. In this case, as the copolymer (A), a copolymer (A2) formed by bonding a reactive group can be used, but usually a copolymer (A) having no reactive group is used.

The polyvinyl alcohol resin used as the hydrophilic polymer (B) in the present invention is usually obtained by polymerizing vinyl acetate to obtain polyvinyl acetate and then saponifying. The saponification degree may be complete saponification or partial saponification.
The polyvinyl pyrrolidone resin used as the hydrophilic polymer (B) in the present invention is usually obtained by polymerizing vinyl pyrrolidone.
The polyether resin used as the hydrophilic polymer (B) in the present invention is usually obtained by ring-opening polymerization of cyclic alkylene oxide or cyclic alkylene imine. The bonding method with the copolymer (A) is not limited. For example, it can be obtained by a ring-opening polymerization method or a ring-opening polymerization method of a cyclic alkylene oxide in a propylene-α-olefin copolymer having a reactive group. And a method of reacting a hydrophilic polymer having a reactive group such as polyether polyol and polyetheramine with a propylene-α-olefin copolymer having a reactive group.

Polyetheramine is a compound having a primary amino group as a reactive group at one or both ends of a resin having a polyether skeleton. Polyether polyol is a compound having hydroxyl groups as reactive groups at both ends of a resin having a polyether skeleton.
Preferred examples of the polyalkylene oxide and polyalkyleneimine exhibiting hydrophilicity include polyethylene oxide, polypropylene oxide, and polyethyleneimine.

Moreover, as a polyetheramine, you may use Huntsman's Jeffamine M series, D series, ED series, etc.
The hydrophilic polymer (B) used in the present invention preferably has at least one reactive group capable of reacting with the copolymer (A) before bonding with the copolymer (A). Examples of the reactive group include a carboxylic acid group, a dicarboxylic acid anhydride group, and a dicarboxylic acid anhydride monoester group, a hydroxyl group, an amino group, an epoxy group, an isocyanate group, and the like, and preferably has at least an amino group. . Since the amino group is highly reactive with various reactive groups such as a carboxylic acid group, a carboxylic anhydride group, a glycidyl group, and an isocyanate group, it is easy to bond a polyolefin and a hydrophilic polymer. The amino group may be primary, secondary, or tertiary, but a primary amino group is more preferable.

The number of reactive groups may be one or more, but more preferably it has only one reactive group. When there are two or more reactive groups, there is a possibility that a three-dimensional network structure will be formed upon bonding with the copolymer (A), resulting in gelation.
However, even if it has a plurality of reactive groups, it is sufficient if only one reactive group is more reactive than the others. For example, a hydrophilic polymer having a plurality of hydroxyl groups and one amino group having a higher reactivity is a preferred example. Here, the reactivity is the reactivity with the reactive group of the copolymer (A).

The hydrophilic polymer (B) in the present invention must be a polymer in order to impart sufficient hydrophilicity to the polymer (C), and is a weight average molecular weight measured by GPC and converted by a polystyrene calibration curve. It is assumed that Mw is 200 or more. Mw is preferably 300 or more, more preferably 500 or more. However, the weight average molecular weight Mw is preferably 200,000 or less. 100,000 or less is more preferable, and 10,000 or less is more preferable. As the Mw is higher than the lower limit, the hydrophilicity of the polymer (C) is increased and the dispersed particle size tends to be smaller and stably dispersed. As the Mw is lower than the upper limit, the viscosity is low and the resin dispersion tends to be easily prepared. . The GPC measurement is performed by a conventionally known method using a commercially available apparatus using THF or the like as a solvent.
If the hydrophilic polymer (B) does not dissolve in THF, use a column that is soluble in a solvent such as water, methanol, ethanol, acetonitrile, dimethylformamide, acetone, chloroform, dimethylsulfoxide, and that matches the polarity of the solvent. GPC can be measured with the same solvent. Further, by adding an ionic substance such as sodium nitrate, an ionic substance can be measured particularly well. In addition, a calibration curve prepared with a standard substance suitable for the polarity of the solvent can be used. For example, polyethylene oxide is preferably used.

The amount of the hydrophilic polymer (B) bonded to the copolymer (A) may be in the range of 0.01 to 5 mmol, ie 0.01 to 5 mmol / g, per 1 g of the copolymer (A). preferable. A more preferred lower limit is 0.05 mmol / g, a still more preferred lower limit is 0.1 mmol / g, and a particularly preferred lower limit is 0.15 mmol / g. On the other hand, a more preferred upper limit is 1 mmol / g, a further preferred upper limit is 0.8 mmol / g, a particularly preferred upper limit is 0.5 mmol / g, and a most preferred upper limit is 0.3 mmol / g. is there.
The amount of the hydrophilic polymer (B) is calculated by 1 / number average molecular weight Mn (mol / g). The higher the lower limit value, the higher the hydrophilicity of the polymer (C) and the smaller the dispersed particle size tends to be stably dispersed, and the lower the upper limit value, the greater the adhesion to the crystalline polyolefin as the substrate. is there.

  The copolymer (A) and the hydrophilic polymer (B) are a graft copolymer in which the hydrophilic polymer (B) is graft-bonded to the copolymer (A), one end of the copolymer (A) or There may be a block copolymer of a copolymer (A) containing a hydrophilic polymer (B) bonded to both ends and a hydrophilic polymer (B), preferably a graft copolymer. is there. The graft copolymer has an advantage that the content of the hydrophilic polymer (B) can be easily controlled and the content of the hydrophilic polymer (B) can be easily increased as compared with the block copolymer.

The hydrophilic polymer (B) can be bonded to the copolymer (A) by various reaction forms. The form is not particularly limited, and examples thereof include a radical graft reaction and a reaction utilizing a reactive group. According to the radical graft reaction, a bond by a carbon-carbon covalent bond is formed.
The reaction using the reactive group has a reactive group in both the copolymer (A) and the hydrophilic polymer (B) and causes them to react and bond, and a covalent bond or an ionic bond Is formed. Examples of this reaction include esterification reaction of carboxylic acid group and hydroxyl group, ring-opening reaction of carboxylic acid group and epoxy group, ring-opening reaction of primary or secondary amino group and epoxy group, carboxylic acid group and 1 Amidation reaction of primary or secondary amino group, quaternary ammonium reaction of carboxylic acid group and tertiary amino group, urethanization reaction of carboxylic acid group and isocyanate group, primary or secondary amino group and isocyanate group Urethane reaction etc. are mentioned. The reaction rate of each reaction may be arbitrarily selected from 1 to 100%, preferably 50 to 100%, more preferably 70 to 100%. The carboxylic acid group here includes a dibasic acid or anhydride thereof such as maleic acid or maleic anhydride. In this case, 1 mol of the dibasic acid or anhydride thereof is calculated as 2 equivalents. The counterpart group may be reacted in one equivalent or in two equivalents.

[3-3] Method for Producing Polymer (C2) As a method for producing the polymer (C2) in which the hydrophilic polymer (B) is bonded to the copolymer (A), the propylene-α-olefin copolymer is usually used. A method (R1) of polymerizing a hydrophilic radical polymerizable unsaturated compound in the presence of a polymer to form a hydrophilic polymer (B) bonded to a propylene-α-olefin copolymer, or a prepolymerized hydrophilic property There is a method (R2) in which the polymer (B) is bonded to a propylene-α-olefin copolymer.

[3-3-1] Production method (R1) of polymer (C2)
In this method, a hydrophilic polymer (bonded to a propylene-α-olefin copolymer by polymerizing a hydrophilic radical polymerizable unsaturated compound (hydrophilic monomer) in the presence of the propylene-α-olefin copolymer ( B) is obtained. As a polymerization method of the hydrophilic radically polymerizable unsaturated compound, for example, addition polymerization, condensation polymerization, ring-opening polymerization and the like can be used. At this time, a hydrophobic radical polymerizable unsaturated compound may be copolymerized as long as a hydrophilic polymer can be formed after polymerization. In any case, as the propylene-α-olefin copolymer, a copolymer (A) having no reactive group or a copolymer (A2) formed by bonding a reactive group can be used.

  Specifically, for example, a hydrophilic radical-polymerizable unsaturated compound is graft-polymerized in the presence of a copolymer (A) and a radical polymerization initiator such as a peroxide or an azo compound to produce a propylene-α-olefin copolymer and polyacrylic. There is a method of using a graft copolymer. Further, as described in JP-A No. 2001-288372, a hydrophilic property is obtained in the presence of a propylene-α-olefin copolymer (A2c1) having a group 13 element group such as a boron group and an aluminum group at its terminal and oxygen. There is a method in which a radically polymerizable unsaturated compound is polymerized to obtain a propylene-α-olefin copolymer and a polyacryl block copolymer. Further, as described in JP-A Nos. 2004-131620 and 2005-48172, a propylene-α-olefin copolymer having a halogen atom at the terminal (A2c3), copper halide, ruthenium halide, etc. are used. There is a method of forming a block copolymer of a propylene polymer and polyacryl by an atom transfer living radical method. Further, as described in JP-A-2001-98140, a radical initiator and a hydrophilic radical-polymerizable unsaturated compound are polymerized in the presence of a propylene-α-olefin copolymer having a mercapto group at the terminal, and propylene- There is a method of using an α-olefin copolymer and a polyacryl block copolymer.

The hydrophilic radically polymerizable unsaturated compound is not particularly limited. For example, (meth) acrylic acid, hydroxyethyl (meth) acrylate, methoxypolyethylene glycol (meth) acrylate, dimethylaminoethyl (meth) acrylate, ( Examples include methacrylic acid dimethylaminoethyl quaternized product, vinyl pyrrolidone and the like.
Examples of the copolymerizable hydrophobic monomer include a (meth) acrylic acid ester monomer having an alkyl group having 1 to 12 carbon atoms, an aryl group or an arylalkyl group, and a hydrocarbon group having 1 to 12 carbon atoms. Examples thereof include polymerizable vinyl monomers.

  Examples of the (meth) acrylic acid ester-based monomer having an alkyl group having 1 to 12 carbon atoms include methyl (meth) acrylate, ethyl (meth) acrylate, (meth) acrylate-n-propyl, (meth) Isopropyl acrylate, n-butyl (meth) acrylate, isobutyl (meth) acrylate, t-butyl (meth) acrylate, hexyl (meth) acrylate, cyclohexyl (meth) acrylate, (meth) acrylic acid Examples include octyl, 2-ethylhexyl (meth) acrylate, nonyl (meth) acrylate, decyl (meth) acrylate, dodecyl (meth) acrylate, and the like.

Examples of the (meth) acrylic acid ester monomer having an aryl group or arylalkyl group having 1 to 12 carbon atoms include phenyl (meth) acrylate, toluyl (meth) acrylate, benzyl (meth) acrylate, and the like. It is done.
Examples of the polymerizable vinyl monomer having a hydrocarbon group having 1 to 12 carbon atoms include vinyl acetate and styrene monomer.

Especially, (meth) acrylic acid esters, such as methyl (meth) acrylate and butyl (meth) acrylate, and vinyl acetate are mentioned as a preferable example.
Reactive surfactants and reactive emulsifiers can also be used as the aqueous radical polymerizable unsaturated compound. Examples thereof include alkyl propenyl phenol polyethylene oxide adducts, alkyl dipropenyl phenol polyethylene oxide adducts, and salts of sulfates thereof disclosed in JP-A-4-53802 and JP-A-4-50204. Among them, alkyl propenylphenol ethylene oxide 20 mol adduct, 30 mol adduct, 50 mol adduct (Daiichi Kogyo Seiyaku, Aqualon RN-20, RN-30, RN-50), or alkylpropenylphenol polyethylene oxide A 10-mol adduct sulfate ammonium salt and a 20-mol adduct sulfate ammonium salt (Daiichi Kogyo Seiyaku, Aqualon HS-10, HS-20) are preferably used.

  Alternatively, there is a method in which a radically polymerizable unsaturated compound is polymerized in the presence of a radical polymerization initiator to form a polymer and bonded to the copolymer (A), and then modified to obtain a hydrophilic polymer (B). is there. For example, after polymerization of (meth) acrylic acid-t-butyl, a method of hydrolyzing under acidic conditions to modify to poly (meth) acrylic acid, a method of polymerizing vinyl acetate, saponifying and modifying to polyvinyl alcohol, etc. . Examples of the copolymerizable hydrophobic radical polymerizable unsaturated compound include (meth) acrylic acid esters such as methyl (meth) acrylate and butyl (meth) acrylate, and vinyl acetate. In this case, a copolymer (A2) having a reactive group can be used as the propylene-α-olefin copolymer, but usually a copolymer (A) having no reactive group is used.

Furthermore, there is a method in which a hydrophilic polymer (B) is obtained by polymerizing a hydrophilic ring-opening polymerization monomer or the like using a copolymer (A2) having a reactive group and using the reactive group as an initiation terminal.
Examples of the hydrophilic ring-opening polymerization monomer include ethylene oxide, propylene oxide, and ethyleneimine. Examples of the copolymerizable hydrophobic monomer include trimethylene oxide, tetrahydrofuran, β-propiolactone, γ-butyrolactone, and ε-caprolactone.

Any of these may be used alone or in combination of two or more.
The reaction method is not particularly limited as long as a polymer satisfying the requirements of the present invention can be produced, and any method may be used. Examples thereof include a method of reacting by heating and stirring in a solution, a method of reacting by melting and heating without solvent, and a method of reacting by heating and kneading with an extruder. The reaction temperature is usually in the range of 0 to 200 ° C, preferably in the range of 30 to 150 ° C. As a solvent in the case of manufacturing in a solution, the solvent mentioned in [3-1] can be used similarly.

[3-3-2] Production method (R2) of polymer (C2)
In this method, the previously polymerized hydrophilic polymer (B) is bonded to the copolymer (A). In this case, as the hydrophilic polymer (B), those mentioned in [3-2] can be used.
Specifically, for example, when a hydrophilic monomer is first polymerized into a hydrophilic polymer, an unsaturated double bond is left in the molecule, and then a propylene-α-olefin is used using a radical polymerizable initiator. There is a method of graft polymerization to a copolymer. In this case, as the propylene-α-olefin copolymer, a copolymer (A2) having a reactive group can be used, but usually a copolymer (A) having no reactive group is used.

  There is also a method in which a hydrophilic polymer having a reactive group at the terminal is first polymerized, and then this is bonded to a copolymer (A2) formed by bonding a reactive group. The hydrophilic polymer having a reactive group at the terminal can be obtained by polymerizing a hydrophilic monomer using a compound having a reactive group as an initiator or a chain transfer agent. Alternatively, it can also be obtained by ring-opening polymerization of a hydrophilic ring-opening polymerization monomer such as an epoxy compound.

As the hydrophilic monomer that can be used at this time, various hydrophilic monomers listed in [3-3-1] can be used similarly.
Any of these may be used alone or in combination of two or more.
The reaction method is not particularly limited as long as a polymer satisfying the requirements of the present invention can be produced, and any method may be used. Examples thereof include a method of reacting by heating and stirring in a solution, a method of reacting by melting and heating without solvent, and a method of reacting by heating and kneading with an extruder. The reaction temperature is usually in the range of 0 to 200 ° C, preferably in the range of 30 to 150 ° C. As a solvent in the case of manufacturing in a solution, the solvent quoted in [3-1] can be used similarly.

[4] Method for Producing Aqueous Resin Dispersion of Polymer (C) The method for producing a resin dispersion containing the polymer (C) according to the present invention is not particularly limited. For example, the polymer (C), water, And preparing a mixture of solvents other than water, and then removing the solvent from the mixture to form an aqueous dispersion. After melting at a temperature at which the polymer (C) melts, water is added and dispersed. The method to make a body, etc. are mentioned. The former is preferred. According to the former method, it is easy to obtain a resin dispersion having a small particle size.
When preparing a mixture, you may heat as needed. The temperature is usually 30 to 150 ° C. The final ratio of the solvent other than water in the resin dispersion is usually 50% or less. It is preferably 20% or less, more preferably 10% or less, and particularly preferably 1% or less.

Especially, the method of adding water after adding a solvent other than water to a polymer (C), and making it melt | dissolve by heating as needed is easy, and can make a finer particle diameter water dispersion, and is still more preferable. The temperature at the time of dissolution in a solvent or at the time of addition of water is usually 30 to 150 ° C. Moreover, when dissolving once in solvents other than water, after adding water, you may distill a solvent off. The ratio of the solvent other than water in the resin dispersion is as described above.
Alternatively, water and a solvent other than water are added to a solution in which the polymer (C) is dissolved in a solvent, and the mixture is heated and dissolved as necessary. Easy to make dispersion. The temperature at the time of addition of water is usually 30 to 150 ° C. The ratio of the solvent other than water in the resin dispersion is as described above.

Examples of the solvent other than water used in the present method include aromatic hydrocarbons such as toluene and xylene; aliphatic hydrocarbons such as hexane, octane and decane; alicyclic aliphatic systems such as cyclohexane and methylcyclohexane. Hydrocarbons: Halogenated hydrocarbons such as methylene chloride, carbon tetrachloride, chlorobenzene; Esters such as methyl acetate, ethyl acetate, propyl acetate, butyl acetate; acetone, methyl ethyl ketone, methyl propyl ketone, methyl isobutyl ketone, cyclohexanone, etc. Ketones; alcohols such as methanol, ethanol, n-propanol, isopropanol, n-butanol, 2-butanol, isobutanol, t-butanol, cyclohexanol, ethylene glycol, propylene glycol, butanediol; Organic solvents having two or more functional groups such as 2-methoxyethanol, 2-ethoxyethanol, 2-butoxyethanol, 2-methoxypropanol, 2-ethoxypropanol, diacetone alcohol, etc. And polar solvents such as dimethylformamide and dimethyl sulfoxide.
These solvents may be used alone or in combination of two or more.

  Of these, at least one solvent that dissolves in water by 1% by weight or more is preferably used, and one that dissolves by 5% by weight or more is more preferable. For example, methyl ethyl ketone, methyl propyl ketone, cyclohexanone, n-propanol, isopropanol, n-butanol, 2-butanol, isobutanol, t-butanol, cyclohexanol, tetrahydrofuran, 2-methoxyethanol, 2-ethoxyethanol, 2-butoxyethanol 2-methoxypropanol, 2-ethoxypropanol and diacetone alcohol are preferred.

  An apparatus for producing a resin dispersion by adding water after being dissolved in a solvent and in a molten state is not particularly limited. For example, a reaction kettle with a stirring device, a uniaxial or biaxial kneader can be used. . The stirring speed at that time varies slightly depending on the selection of the apparatus, but is usually in the range of 10 to 1,000 rpm.

[5] Aqueous resin dispersion The polymer (C) of the present invention is very excellent in water dispersibility, and according to the method for producing a resin dispersion of the present invention, an aqueous resin dispersion having a fine dispersed particle size is obtained. Therefore, the aqueous resin dispersion of the present invention has an advantage that the dispersed particle diameter is fine and the resin is stably dispersed. Therefore, when this is used, a coated product having an excellent appearance can be obtained.

  The 50% particle diameter of the polymer (resin) in the resin dispersion of the present invention is 0.5 μm or less. The 50% particle size is preferably 0.3 μm or less, more preferably 0.2 μm or less. Further, the 90% particle size is preferably 1 μm or less, and particularly preferably 0.5 μm or less. By reducing the dispersed particle size, the dispersion stability is improved, aggregation is unlikely to occur, and the dispersion can be more stably dispersed. Further, a reduction in the ratio of the 90% particle diameter to the 50% particle diameter means that the particle size distribution becomes narrow, and as a result, the dispersion stability is improved. The “50% particle size” is a cumulative 50% particle size from the finer particle size in terms of volume, and is also referred to as a 50% average particle size. Similarly, 90% of the cumulative particle size is 90%.

In the present invention, the term “dispersion” is a concept including a state in which dispersed particles are extremely small and dispersed in a single molecule, and a state that can be said to be substantially dissolved. Accordingly, there is no particular limitation on the lower limit value of the dispersed particle size.
The solid content in the resin dispersion of the present invention is preferably 5% by weight or more, more preferably 10% by weight or more, and still more preferably 20% by weight or more based on the whole. Further, it is preferably 70% by weight or less, more preferably 60% by weight or less, still more preferably 50% by weight or less, and particularly preferably 40% by weight or less. The smaller the amount of solid content, the lower the viscosity, the easier it can be applied to various application methods and the higher the stability as a dispersion. However, for example, when used as a primer or an adhesive, it is preferable that the solid content is large so that a large amount of energy and time are not required for drying water after coating.

  In the resin dispersion of the present invention, the surfactant content is 15 parts by weight or less based on 100 parts by weight of the polymer (C). That is, the dispersed particle diameter of the resin is very small and the surfactant is very little or substantially free of surfactant. Thereby, when this resin dispersion is used as a coating material, there is an advantage that a bleed-out can be suppressed and a coated product excellent in appearance can be obtained, and this resin dispersion can be used as a coating material on the outermost surface of coating. In addition, the water resistance and oil resistance (gasohol resistance) of the coating can be improved, and the resulting resin dispersion can be used for any of adhesion, water resistance, moisture resistance, oil resistance (gasohol resistance), and chemical resistance. Will also be excellent.

  A smaller amount of the surfactant is preferred, and the surfactant content of the resin dispersion is preferably 10 parts by weight or less with respect to 100 parts by weight of the polymer (C). More preferably, it is 5 parts weight or less, More preferably, it is 2 parts weight or less. It can also be substantially free of surfactant. “Substantially free of surfactant” means less than 1 part by weight per 100 parts by weight of the polymer (C). Most preferably, no surfactant is included.

  As the surfactant, for example, a cationic surfactant, an anionic surfactant, a nonionic surfactant, an amphoteric surfactant, a reactive surfactant and the like can be used. As the surfactant, those having an alkyl group, alkenyl group, alkylaryl group or alkenylaryl group having 4 or more carbon atoms as a hydrophobic group are usually used. Preferably it is C8 or more, More preferably, it is C12 or more. However, it usually has 30 or less carbon atoms.

  Examples of the nonionic surfactant include polyoxyethylene cetyl ether, polyoxyethylene stearyl ether, polyoxyethylene nonylphenyl ether, polyoxyethylene sorbitan monolaurate, and the like. Examples of the anionic surfactant include sodium dodecylbenzenesulfonate, sodium sulfosuccinate, sodium lauryl sulfate, sodium polyoxyethylene lauryl sulfate, and the like. Examples of the cationic surfactant include stearyl trimethyl ammonium chloride, cetyl trimethyl ammonium bromide and the like. Examples of amphoteric surfactants include lauryldimethylaminoacetic acid betaine.

Moreover, what is called a reactive surfactant etc. in which said surfactant has a radically polymerizable functional group can also be used. When a reactive surfactant is used, the water resistance of a film formed using this resin dispersion can be improved. Representative commercially available reactive surfactants include Eleminol JS-2 (manufactured by Sanyo Chemical Industries) and Latemul S-180 (manufactured by Kao Corporation).
In addition, since nonionic surfactant is hard to reduce water resistance compared with other surfactant, nonionic surfactant may be included a little more. For example, when the surfactant other than the nonionic surfactant should be 5 parts by weight or less with respect to 100 parts by weight of the polymer (C), the nonionic surfactant may be 10 parts by weight or less.

Further, according to the present invention, there is an advantage that it is not always necessary to use chlorinated polyolefin, and the environmental load can be reduced.
An acidic substance or a basic substance can be added to the resin dispersion of the present invention as necessary. Examples of the acidic substance include inorganic acids such as hydrochloric acid and sulfuric acid, and organic acids such as acetic acid. Examples of the basic substance include inorganic bases such as sodium hydroxide and potassium hydroxide, triethylamine, diethylamine, diethylethanolamine, 2-methyl-2-amino-propanol, and morpholine. A polymer containing an acidic group or a basic group may also be used.

  The resin dispersion of the present invention can contain various additives as required within a range that does not significantly impair the effects of the present invention. For example, various stabilizers such as ultraviolet absorbers, antioxidants, weathering stabilizers, and heat resistance inhibitors; colorants such as titanium oxide and organic pigments; conductivity imparting agents such as carbon black and ferrite; pigments, dyes, pigment dispersions Various additives such as additives, leveling agents, antifoaming agents, thickeners, preservatives, fungicides, rust inhibitors, wetting agents, and drying inhibitors may be used in combination.

Examples of the antifoaming agent include Surfynol 104PA or Surfynol 440 manufactured by Air Products.
Examples of the anti-drying agent include Byketol-PC manufactured by Big Chemie and the surfactants listed above.
In order to further improve various coating film performances such as water resistance and solvent resistance, 0.01 to 100 parts by weight of a crosslinking agent can be added to 100 parts by weight of the resin in the dispersion. As the crosslinking agent, a crosslinking agent having self-crosslinking property, a compound having a plurality of functional groups that react with a carboxyl group in the molecule, a metal complex having a polyvalent coordination site, or the like can be used. Of these, isocyanate compounds, melamine compounds, urea compounds, epoxy compounds, carbodiimide compounds, oxazoline group-containing compounds, zirconium salt compounds, silane coupling agents and the like are preferable. Moreover, you may use combining these crosslinking agents.

When the resin dispersion of the present invention is used for primer, paint, ink, etc., a hydrophilic organic solvent other than water may be blended for the purpose of increasing the drying speed or obtaining a surface with a good finish. it can. Examples of the hydrophilic organic solvent include alcohols such as methanol, ethanol and propanol, ketones such as acetone, glycols such as ethylene glycol and propylene glycol, or ethers thereof. In addition, organic or inorganic compounds other than those described above can be added to the resin dispersion as long as the stability of the resin dispersion is not impaired.
In particular, the water dispersion of the present invention is characterized by excellent mixing stability of the solvent. Usually, when a hydrophilic organic solvent such as alcohol is added to a polyolefin aqueous dispersion using a surfactant, the surfactant tends to be detached from the polyolefin and gelled. In contrast, the aqueous dispersion of the present invention has a water-dispersing function in the polyolefin itself, so that it stably exists without causing gelation or aggregation even when a hydrophilic solvent is added. Generally, a hydrophilic organic solvent is added. It is also suitably used for the ink used.

[5-1] Combined use of other resins In the resin dispersion of the present invention, a water-soluble resin or a resin that can be dispersed in water is mixed and used as necessary within a range not significantly impairing the effects of the present invention. Can do. For example, it is effective for improving the appearance of the coating (glossing or matting) and reducing tackiness. It may be a resin that can be dispersed using a surfactant. As the water-soluble resin, for example, resins such as those listed as the hydrophilic polymer (B) can be used. For example, an aqueous solution obtained by dissolving these resins in water can be mixed with the resin dispersion of the present invention.

  Examples of the resin that can be dispersed in water include acrylic resin, polyepoxy resin, polyester resin, polyurethane resin, melamine resin, and alkyd resin. The form of the resin dispersion containing these resins and the polymer (C) is not particularly limited. For example, there is a method of emulsifying and mixing these resins and the polymer (C). In this method, particles made of these resins and particles made of the polymer (C) are separately formed, and an aqueous resin dispersion dispersed in water is obtained.

  Moreover, there exists the method of emulsifying after mixing these resin and a polymer (C). In this method, an aqueous resin dispersion is obtained in which particles in which these resins and the polymer (C) are mixed in one particle are dispersed in water. For example, when the polymer (C) is allowed to coexist during polymerization of the resin, both can be mixed, and emulsified and dispersed in water to form particles containing the resin and the polymer (C) in one particle. Also, the resin and the polymer (C) can be mixed separately by synthesizing the resin and the polymer (C), and the both can be mixed. The particles containing the resin and the polymer (C) in one particle can be emulsified and dispersed in water Can form.

In order to effectively exhibit the properties of the polymer (C) and the resin, an aqueous resin dispersion in which particles made of the polymer (C) and particles made of the resin are present separately is preferable. Such an aqueous resin dispersion can be obtained, for example, by mixing a dispersion obtained by emulsifying and dispersing the polymer (C) in water and a dispersion obtained by emulsifying and dispersing the resin in water.
The resin content is preferably in the range of 90:10 to 10:90 in mass ratio between the copolymer (A) and the other resin. That is, the total amount of the copolymer (A) and other resins is 100 parts by weight, and the amount of the copolymer (A) is preferably 10 parts by weight or more, and preferably 90 parts by weight or less. When the amount of the copolymer (A) is less than 10 parts by weight, the adhesion to the polyolefin-based substrate tends to be insufficient. More preferably, it is 15 parts by weight or more, and further preferably 20 parts by weight or more. When the amount of the copolymer (A) is larger than 90 parts by weight, the physical properties of the coating film obtained from such a composite aqueous resin dispersion, specifically, the strength, water resistance, weather resistance, and abrasion resistance of the coating film. Solvent resistance tends to be insufficient. More preferably, it is 85 weight part or less, More preferably, it is 80 weight part or less.

  The total resin content in the resin dispersion is preferably such that the weight ratio of the total amount of the polymer (C) and the other resin to water is 5:95 to 60:40. That is, the total amount of the polymer (C) and other resin and water is 100 parts by weight, and the total amount of the polymer (C) and other resin is preferably 5 parts by weight or more, and preferably 60 parts by weight or less. If it is less than 5 parts by weight, workability such as coating and heat curing tends to deteriorate. More preferably, it is 10 parts by weight or more, and further preferably 15 parts by weight or more. When it is larger than 60 parts by weight, the viscosity of the aqueous resin dispersion becomes too high, the applicability tends to deteriorate, and a uniform coating film is difficult to form. More preferably, it is 55 weight part or less, More preferably, it is 50 weight part or less.

In the case where the other resin is emulsified into an aqueous resin dispersion, a surfactant may be used as necessary. As the surfactant, for example, those listed in [5] can be used.
The surfactant can also be used in a production method in which the polymer (C) and the resin are mixed and then emulsified.
In this case, the surfactant content of the resin dispersion is preferably 15 parts by weight or less with respect to 100 parts by weight of the total resin amount (the total amount of the polymer (C) and the other resin). More preferably, it is 10 parts by weight or less, further preferably 5 parts by weight or less, and particularly preferably 2 parts by weight or less. It can also be substantially free of surfactant. “Substantially no surfactant” means less than 1 part by weight based on 100 parts by weight of the total resin. Most preferably, no surfactant is included.

  As said other resin, at least 1 or more resin chosen from the group which consists of an acrylic resin, a polyester resin, a polyurethane resin, and an epoxy resin is preferable. Resin dispersions containing these are suitable for paints. Hereinafter, these are collectively referred to as the resin (D).

(D-1) Acrylic resin The acrylic resin as an example of the other resin in the present invention is not particularly limited as long as it is a (meth) acrylic polymer, but is a homopolymer or copolymer of acrylic acid and / or its ester. It is a homopolymer or copolymer of a polymer, methacrylic acid and / or its ester. (Meth) acrylic means acrylic and / or methacrylic.

  Specific examples of the (meth) acrylate ester include (meth) acrylate ester monomers having an alkyl group having 1 to 12 carbon atoms such as methyl (meth) acrylate, ethyl (meth) acrylate, (meth ) Acrylic acid-n-propyl, (meth) acrylic acid isopropyl, (meth) acrylic acid-n-butyl, (meth) acrylic acid isobutyl, (meth) acrylic acid-t-butyl, (meth) acrylic acid pentyl, ( Hexyl (meth) acrylate, cyclohexyl (meth) acrylate, octyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, nonyl (meth) acrylate, decyl (meth) acrylate, dodecyl (meth) acrylate Or (meth) acrylic acid ester having an aryl group or aralkyl group having 6 to 12 carbon atoms For example (meth) acrylate, phenyl include benzyl (meth) acrylate and the like.

  Further, (meth) acrylic acid esters having a C 1-20 alkyl group containing a hetero atom, such as dimethylaminoethyl (meth) acrylate, diethylaminoethyl (meth) acrylate, (meth) acrylic acid- 2-aminoethyl, (meth) acrylic acid glycidyl, (meth) acrylic acid-2-hydroxyethyl, (meth) acrylic acid hydroxybutyl, (meth) acrylic acid-2-methoxyethyl, (meth) acrylic acid-3- Examples include methoxypropyl, adducts of (meth) acrylic acid and polyethylene oxide. Furthermore, (meth) acrylic acid esters having a C 1-20 alkyl group containing a fluorine atom, such as trifluoromethylmethyl (meth) acrylate, 2-trifluoromethylethyl (meth) acrylate, ( Examples include 2-methacrylic acid 2-perfluoroethylethyl and (meth) acrylamide monomers such as (meth) acrylamide and (meth) acryldimethylamide.

  In addition to the above (meth) acrylic acid and / or esters thereof, those having a double bond at the end of a molecule called a so-called macromonomer are also included. These (meth) acrylic macromonomers usually have a weight average molecular weight in the range of several hundred to 50,000. Such (meth) acrylic oligomer is usually used in the range of 1 to 80 parts by weight per 100 parts by weight of the above (meth) acrylic acid and / or esters thereof.

In addition to the above macromonomers, caprolactone-modified (meth) acrylic oligomers, terminal hydroxyl group-containing (meth) acrylic oligomers, oligoester (meth) acrylic oligomers, urethane (meth) acrylates, epoxy (meth) acrylates, etc. are also acrylic. As an example of resin.
In order to impart water resistance, heat resistance, solvent resistance, and chemical resistance to the acrylic resin, a crosslinkable functional group can be introduced and a crosslinking agent can be used in combination. For example, a copolymer having an epoxy group such as glycidyl (meth) acrylate and a polyfunctional carboxylic acid or polyfunctional amine as a cross-linking agent; (meth) acrylic acid-2-hydroxyethyl, (meth) acrylic acid hydroxybutyl A copolymer having a hydroxyl group and a polyfunctional isocyanate; or a copolymer having a carbonyl group such as diacetone acrylamide and acrolein; The system can be used. Among these, a crosslinking system using a carbonyl group and a polyfunctional hydrazine is preferable because it can be stored at one temperature and can be cured at room temperature. These crosslinkable functional groups preferably have 0.5 parts by weight or more per 100 parts by weight of acrylic resin, and more preferably 1 part by weight or more. However, it is preferably 20 parts by weight or less per 100 parts by weight of acrylic resin, more preferably 10 parts by weight or less. The higher the lower limit value, the easier it is to obtain a sufficient crosslinking effect, and the lower the upper limit value, the higher the storage stability and the like.

Although it does not specifically limit as a polymerization method for manufacturing the above acrylic resins, For example, methods, such as solution polymerization, bulk polymerization, emulsion polymerization, or suspension polymerization, can be used.
In order to emulsify the acrylic resin obtained by solution polymerization and bulk polymerization into an aqueous emulsion to form an aqueous dispersion, emulsification and dispersion are performed by mechanical force such as a colloid mill in the presence or absence of the solution, and then What is necessary is just to distill off a residual solvent under reduced pressure or atmospheric pressure as needed. If emulsion polymerization or suspension polymerization is used, the polymer can be obtained directly as an aqueous resin dispersion.

The number average molecular weight of the acrylic resin that can be used in the present invention is preferably 1,000 or more, and more preferably 20,000 or more. However, it is preferably 1,000,000 or less, more preferably 500,000 or less.
The particle diameter of the acrylic resin particles in the aqueous resin dispersion of the acrylic resin is preferably 0.01 μm to 0.5 μm. The acrylic resin solid content in the acrylic resin aqueous resin dispersion is preferably 15 to 70% by weight. The liquid viscosity of the acrylic resin aqueous resin dispersion is preferably 1 to 50,000 mPa · s.

(D-2) Polyurethane resin The polyurethane resin that can be used in the present invention is not particularly limited. For example, (i) a component containing an average of two or more active hydrogens in one molecule and (ii) A urethane polymer obtained by reacting with a polyvalent isocyanate component, or an isocyanate group-containing prepolymer obtained by reacting the above components (i) and (ii) under an excess of isocyanate groups, and a chain such as diol Examples thereof include urethane polymers obtained by reacting with an extender. These urethane polymers may contain an acid component (acid residue).

The chain extension method of the isocyanate group-containing prepolymer may be a known method. For example, water, a water-soluble polyamine, glycols or the like is used as the chain extender, and the isocyanate group-containing prepolymer and the chain extender component are used. May be reacted in the presence of a catalyst as necessary.
The component containing an average of 2 or more active hydrogens in one molecule of the component (i) is not particularly limited, but preferably has a hydroxylic active hydrogen. Specific examples of such compounds include the following.

  (1) Diol compound: ethylene glycol, propylene glycol, diethylene glycol, triethylene glycol, 1,2-butylene glycol, 1,3-butylene glycol, 2,3-butylene glycol, 1,4-butylene glycol, 1,5- Pentanediol, neopentyl glycol, 1,6-hexane glycol, 2,5-hexanediol, dipropylene glycol, 2,2,4-trimethyl-1,3-pentanediol, tricyclodecane dimethanol, 1,4- And cyclohexanedimethanol.

  (2) Polyether diol: An alkylene oxide adduct of the above diol compound or a ring-opening (co) polymer of alkylene oxide or cyclic ether (tetrahydrofuran). Examples thereof include polyethylene glycol, polypropylene glycol, ethylene glycol-propylene glycol (block or random) copolymer, glycol, polytetramethylene glycol, polyhexamethylene glycol, polyoctamethylene glycol and the like.

  (3) Polyester diol: dicarboxylic acids (anhydrides) such as adipic acid, succinic acid, sebacic acid, glutaric acid, maleic acid, fumaric acid, phthalic acid, and ethylene glycol and propylene as mentioned in (1) above Examples thereof include those obtained by polycondensation of diol compounds such as glycol, 1,4-butanediol, 1,6-hexanediol, 1,8-octamethylenediol, neopentylglycol and the like under conditions of excess hydroxyl groups. . Specifically, ethylene glycol-adipic acid condensate, butanediol-adipic acid condensate, hexamethylene glycol-adipic acid condensate, ethylene glycol-propylene glycol-adipic acid condensate, or lactone is opened using glycol as an initiator. Examples include ring-polymerized polylactone diol.

  (4) Polyether ester diol: (anhydrous) dicarboxylic acid as exemplified in the above (3), an ether group-containing diol (polyether diol or diethylene glycol of (2) above) or a mixture of this with another glycol In addition to the above, an alkylene oxide is reacted. Examples thereof include polytetramethylene glycol-adipic acid condensate.

(5) Polycarbonate diol: General formula HO—R— (O—C (O) —O—R) _x —OH (wherein R is a saturated fatty acid diol residue having 1 to 12 carbon atoms, x is a molecular weight) It indicates the number of repeating units and is usually an integer of 5 to 50.). These are transesterification methods in which a saturated aliphatic diol and a substituted carbonate (diethyl carbonate, diphenyl carbonate, etc.) are reacted under conditions where the hydroxyl group is excessive, or the saturated aliphatic diol and phosgene are reacted or necessary. Accordingly, it can be obtained by a method of further reacting with a saturated aliphatic diol.

The compounds as exemplified in the above (1) to (5) can be used alone or in combination of two or more.
As the polyisocyanate component (ii) to be reacted with the component (i), an aliphatic, alicyclic or aromatic compound containing an average of two or more isocyanate groups in one molecule can be used.

  The aliphatic diisocyanate compound is preferably an aliphatic diisocyanate having 1 to 12 carbon atoms, and examples thereof include hexamethylene diisocyanate and 2,2,4-trimethylhexane diisocyanate. The alicyclic diisocyanate compound is preferably an alicyclic diisocyanate having 4 to 18 carbon atoms, and examples thereof include 1,4-cyclohexane diisocyanate and methylcyclohexylene diisocyanate. Examples of the aromatic isocyanate include tolylene diisocyanate, 4,4′-diphenylmethane diisocyanate, and xylylene diisocyanate.

  In addition, those containing acid residues in the urethane polymer can be dispersed in water without using a surfactant or even in a small amount, so the water resistance of the coating film is good. Is expected to be. The content of the acid residue is preferably in the range of 25 to 150 (mgKOH / g), preferably 30 to 100 (mgKOH / g) as the acid value of the urethane polymer. If the acid value is less than 25, water dispersibility tends to be insufficient, and a surfactant is often required in combination. On the other hand, if the acid value is greater than 150, the water resistance of the coating film tends to be poor.

  As a method for introducing an acid group into the urethane polymer, a conventionally used method can be used without any particular limitation. For example, by replacing dimethylolalkanoic acid with part or all of the glycol component described in (2) to (4) above, a carboxyl group is previously introduced into polyether diol, polyester diol, polyether ester diol, etc. Therefore, a method of introducing an acid group is preferable. Examples of the dimethylolalkanoic acid used here include dimethylolacetic acid, dimethylolpropionic acid, and dimethylolbutyric acid.

As the polyurethane resin usable in the present invention, the number average molecular weight is preferably 1,000 or more, more preferably 20,000 or more. However, it is preferably 1,000,000 or less, more preferably 200,000 or less.
When manufacturing the said polyurethane resin aqueous dispersion, the manufacturing method is not specifically limited, It can manufacture according to the manufacturing method of the water dispersion of the above-mentioned acrylic resin.
The particle diameter of the polyurethane resin in the aqueous resin dispersion is preferably 0.01 μm to 0.5 μm. The polyurethane resin solid content in the polyurethane resin aqueous resin dispersion is preferably 15 to 70% by weight. The liquid viscosity of the polyurethane resin aqueous resin dispersion is preferably 1 to 10,000 mPa · s.

(D-3) Polyester resin The polyester resin that can be used in the present invention is not particularly limited, and examples thereof include adipic acid, succinic acid, sebacic acid, glutaric acid, maleic acid, fumaric acid, and phthalic acid. Dicarboxylic acids and / or anhydrides thereof, diol compounds such as ethylene glycol, propylene glycol, 1,4-butanediol, 1,6-hexanediol, 1,8-octamethylenediol, neopentylglycol, or ether group-containing diols Examples thereof include those obtained by polycondensation (polyethylene glycol, polypropylene glycol, polytetramethylene glycol, etc.).

Specific examples include ethylene glycol-adipic acid condensate, butanediol-adipine condensate, hexamethylene glycol-succinic acid condensate, ethylene glycol-propylene glycol-phthalic acid condensate, polyethylene glycol-adipic acid condensate, and the like. It is done.
An aqueous dispersion of the polyester resin can be obtained by emulsifying these in the presence or absence of a surfactant. Although the manufacturing method is not specifically limited, it can manufacture according to the manufacturing method of the aqueous dispersion of the above-mentioned acrylic resin. Examples of commercially available products include Byronal MD-1200 and MD-1245 manufactured by Toyobo.

The polyester resin usable in the present invention preferably has a number average molecular weight of 1,000 or more, more preferably 5,000 or more. However, 500,000 or less is preferable, and more preferably 100,000 or less.
As for the particle size in the aqueous resin dispersion of the said polyester resin, 0.01 micrometer-0.5 micrometer are preferable. Moreover, it is preferable that the polyester resin solid content in the aqueous resin dispersion of a polyester resin is 15 to 70 weight%. The liquid viscosity of the aqueous resin dispersion of the polyester resin is preferably 1 to 10,000 mPa · s.

(D-4) Epoxy resin The epoxy resin that can be used in the present invention is not particularly limited as long as it is a polymer having one or more epoxy groups in one molecule. For example, a polyhydric phenol and epichlorohydrin in the presence of an alkali. Examples thereof include polyhydric glycidyl ethers of phenol that can be produced by reaction, and epoxy group-containing polymers obtained by reacting such polyhydric glycidyl ethers of phenol with the above polyhydric phenols.

  Examples of the polyhydric phenol that can be used here include bis (4-hydroxyphenyl) -2,2-propane, 4,4′-dihydroxybenzophenone, bis (4-hydroxyphenyl) -1,1-ethane, Bis (4-hydroxyphenyl) -1,1-isobutane, bis (4-hydroxy-t-butyl-phenyl) -2,2-propane, bis (2-hydroxynaphthyl) methane, 1,5-dihydroxynaphthalene, etc. Can be mentioned.

Instead of these polyhydric phenols, hydrogenated compounds obtained by adding hydrogen to part or all of the double bonds of the phenyl nucleus can also be used.
As the epoxy resin, polyglycidyl ether of phenolic novolac resin or polyglycidyl ether of polyhydric alcohol can also be used. Examples of the polyhydric alcohol include ethylene glycol, diethylene glycol, triethylene glycol, 1,2-propylene glycol, 1,4-propylene glycol, 1,5-pentanediol, 1,2,6-hexanetriol, and glycerol. , Bis (4-hydroxycyclohexyl) -2,2-propane, sorbitol and the like.

An aqueous dispersion of an epoxy resin is obtained by emulsifying these in the presence or absence of a surfactant. Although the manufacturing method is not specifically limited, it can manufacture according to the manufacturing method of the aqueous dispersion of the above-mentioned acrylic resin.
As a representative commercially available product, a de novolak type epoxy resin obtained by adding epichlorohydrin to a phenol novolac resin and forcibly emulsified with a surfactant (emulsifier), Denar EM150 manufactured by Nagase Chemtech Co., Ltd. Examples include Epiretz 6006W70 and 5003W55 manufactured by Japan Epoxy Resin Co., Ltd., WEX-5100 manufactured by Tohto Kasei Co., Ltd. and the like.

In addition, bisphenol type epoxy resin obtained by adding epichlorohydrin to bisphenol in the same manner was forcibly emulsified with an emulsifier, such as Denars EM101 and EM103 manufactured by Nagase Chemtech, Epiretz 3510W60, 3515W6, 3522W60, 3540WY55 manufactured by Japan Epoxy Resin Co., Ltd. Is mentioned.
Furthermore, as an alkyl type epoxy resin in which epichlorohydrin is added to a polyol such as sorbitol, pentaerythritol, glycerin, etc., Denars EX-611, EX-614, EX-411, EX-313 manufactured by Nagase Chemtech Co., Ltd. and the like can be mentioned.

[5-2] Addition of pigment Pigment (E) can be added to the resin dispersion of the present invention. The aqueous resin dispersion containing the pigment (E) is suitable as a paint.

  The pigment that can be used is not particularly limited, but for example, inorganic pigments such as titanium oxide, carbon black, iron oxide, chromium oxide, bitumen, bengara, yellow lead, yellow iron oxide, or azo pigments, anthracene pigments, perinone pigments Colored pigments such as pigments, perylene pigments, quinacridone pigments, isoindolinone pigments, indigo pigments, phthalocyanine pigments, and other organic pigments; constitutions such as talc, calcium carbonate, clay, kaolin, silica, precipitated barium sulfate Pigment; Conductive pigment such as whisker coated with conductive carbon and antimony-doped tin oxide; Non-colored or colored metallic luster such as aluminum, copper, zinc, nickel, tin, aluminum oxide, etc. One type or two or more types may be used in combination.

  The amount of the pigment (E) added to the resin dispersion of the present invention is preferably 10 parts by weight or more with respect to 100 parts by weight of the resin (the total amount of the polymer (C) and other resins). More preferably, it is 50 parts by weight or more. However, it is preferably 400 parts by weight or less, and more preferably 200 parts by weight or less. As the addition amount is larger than the lower limit value, the color developability and the hiding property tend to be higher, and as the addition amount is smaller than the upper limit value, the adhesion, moisture resistance and oil resistance tend to be higher.

  At this time, a pigment dispersant may be used. For example, an aqueous acrylic resin such as Jonkrill Resin manufactured by Johnson Polymer Co., Ltd .; an acidic block copolymer such as BYK-190 manufactured by BYK Chemie Co., Ltd .; a styrene-maleic acid copolymer; Examples thereof include acetylenic diol derivatives such as Surfynol T324; water-soluble carboxymethyl acetate butyrate such as CMCAB-641-0.5 manufactured by Eastman Chemical Company. By using these pigment dispersants, a stable pigment paste can be prepared.

  The resin dispersion of the present invention can be used for primers, primer-less paints, adhesives, inks and the like. The present invention is particularly useful as a primer, a paint, or an adhesive. Particularly suitable for polyolefin substrates. For example, it can be used for paints for automobiles such as automobile interiors and exteriors, primers, paints for home appliances such as mobile phones and personal computers, and paints for building materials.

[6] Laminate A resin layer can be formed by applying the resin dispersion of the present invention or a paint containing the same to a substrate and heating it to form a laminate. This resin layer is composed of a propylene-α-olefin copolymer (A), which is a copolymer of propylene and an α-olefin other than propylene, with a hydrophilic polymer (B) bonded or an acidic group. A polymer (C) formed by bonding, wherein the copolymer (A) has a propylene content of 50 mol% or more and less than 100 mol%, and the copolymer (A) has a weight average molecular weight Mw of 10,000. This is a layer having a molecular weight distribution Mw / Mn of 3.5 or less and a surfactant content of 15 parts by weight or less with respect to 100 parts by weight of the polymer (C).

This laminate can be used for various applications such as for automobiles, home appliances, and building materials. The substrate may be in any shape, such as a film, sheet, or plate.
The hardness of the resin layer can be soft or hard by selecting the types and amounts of (A) and (B) according to the application. For example, a car exterior paint requires a hard performance, so it is hard, and a car interior paint requires a soft performance. The hardness can be evaluated by tensile elasticity or bending elasticity.
The resin dispersion of the present invention can be applied to a molded body (base material) of a crystalline olefin polymer to form a coating film. Examples of the olefin polymer as the base material include high-pressure polyethylene, medium-low pressure polyethylene, polypropylene, poly-4-methyl-1-pentene, poly-1-butene, polystyrene, and the like; ethylene-propylene copolymer Examples thereof include olefin copolymers such as polymers, ethylene-butene copolymers, and propylene-butene copolymers. Of these olefin copolymers, propylene-based polymers are preferably used. Also, molded articles made of polypropylene and synthetic rubber, molded articles made of polyamide resin, unsaturated polyester resin, polybutylene terephthalate resin, polycarbonate resin, etc., such as molded articles such as bumpers for automobiles, and also for steel plates and electrodeposition treatment It can also be used for surface treatment of steel plates and the like.

The molded product to which the resin dispersion of the present invention is applied is formed by any of the above-mentioned various polymers or resins by any of known molding methods such as injection molding, compression molding, hollow molding, extrusion molding, and rotational molding. It may be what was done.
Even when inorganic fillers such as talc, zinc white, glass fiber, titanium white, and magnesium sulfate, pigments, and the like are blended in these molded bodies, a coating film with good adhesion can be formed.

[6-1] Manufacturing Method of Laminate The method for forming the resin layer on the substrate is not particularly limited, and any known method can be used. For example, a resin dispersion or a paint is applied by spraying. Examples thereof include a method, a method of applying with a roller, and a method of applying with a brush.

  After applying the resin dispersion or paint, it is usually heated with nichrome wire, infrared rays, high frequency or the like to cure the coating film, thereby obtaining a laminate having a desired coating film on the surface. The curing conditions for the coating film are appropriately selected depending on the material and shape of the substrate, the composition of the paint used, and the like. Although there is no restriction | limiting in particular in hardening temperature, Considering practicality, it is 50 degreeC or more normally, Preferably it is 60 degreeC or more. However, it is usually 150 ° C. or lower, preferably 130 ° C. or lower.

  The thickness of the resin layer to be laminated (after curing) can be appropriately selected depending on the material and shape of the substrate, the composition of the paint used, etc., but is usually 0.1 μm or more, preferably 1 μm or more, more preferably 5 μm. That's it. However, it is usually 500 μm or less, preferably 300 μm or less, more preferably 200 μm or less.

[6-2] Thermoplastic resin molding (F)
As the base material of the laminate of the present invention, a thermoplastic resin molded body is desirable. Although it does not specifically limit as a thermoplastic resin molded object (F), For example, it is a molded object which consists of polyolefin resin, polyamide resin, polyethylene terephthalate resin, polybutylene terephthalate resin, polycarbonate resin etc. Especially, it is preferable to apply this invention to the thermoplastic resin molded object (F) (henceforth a polyolefin molded object) which consists of polyolefin resin.

  The polyolefin molded body is usually a crystalline polyolefin molded body, and various known polyolefins can be used, and is not particularly limited. For example, a homopolymer of ethylene or propylene, a copolymer of ethylene and propylene; ethylene or / and propylene and other comonomers such as 1-butene, 1-pentene, 1-hexene, 1-heptene, 1-octene, A copolymer with an α-olefin comonomer having 2 or more carbon atoms such as cyclopentene, cyclohexene, or norbornene; or two or more kinds of copolymers of these comonomers can be used.

  As the α-olefin comonomer, an α-olefin comonomer having 2 to 6 carbon atoms is preferable. Also, a copolymer of an α-olefin monomer and a comonomer such as vinyl acetate, acrylic acid ester, or methacrylic acid ester, or a copolymer of a comonomer such as an aromatic vinyl monomer, or a hydrogenated product or conjugated diene block copolymer. A combined hydrogenated product can also be used. In addition, when only calling it a copolymer, it may be a random copolymer or a block copolymer. The polyolefin may be modified as necessary.

These can be used alone or as a mixture depending on the application.
The polyolefin preferably has a melt flow rate (MFR) of 2 g / 10 min or more, more preferably 10 g / 10 min or more, and particularly preferably 25 g / 10 min. However, it is preferably 300 g / 10 min or less, more preferably 200 g / 10 min or less. If the MFR is higher than the lower limit, the flowability of the polyolefin tends to increase. Conversely, if the MFR is lower than the upper limit value, the mechanical properties tend to increase. The MFR of the polyolefin may be adjusted at the time of polymerization, or may be adjusted with an organic peroxide such as diacyl peroxide or dialkyl peroxide after the polymerization.

  Crystalline polypropylene is more preferred as the polyolefin. Crystalline polypropylene is a propylene homopolymer and / or a propylene-ethylene copolymer. Here, the propylene-ethylene copolymer is a propylene-ethylene random copolymer and / or a propylene-ethylene block copolymer, and preferably a propylene-ethylene block copolymer.

Here, the propylene-ethylene block copolymer consists of a crystalline polypropylene part (a unit part) and an ethylene-propylene random copolymer part (b unit part).
The a unit is usually obtained by homopolymerization of propylene, and in some cases, by copolymerizing propylene with a small amount of other α-olefin.
The MFR of the polypropylene homopolymer of a unit part is preferably 10 g / 10 min or more, more preferably 15 g / 10 min or more, still more preferably 20 g / 10 min or more, particularly preferably 40 g / 10 min or more. . However, it is preferably 500 g / 10 min or less, more preferably 400 g / 10 min or less, and still more preferably 300 g / 10 min or less.

As this MFR is higher than the lower limit, the flowability tends to increase. Conversely, the mechanical properties tend to increase as the MFR is lower than the upper limit.
On the other hand, the b unit is a rubbery component obtained by random copolymerization of propylene and ethylene.
The propylene content of the propylene-ethylene random copolymer part of the b unit part is preferably 30% by weight or more, more preferably 40% by weight or more, and further preferably 50% by weight or more. However, it is preferably 85% by weight or less, more preferably 80% by weight or less, and still more preferably 75% by weight or less. When the propylene content is within this range, the dispersibility and glass transition temperature are within an appropriate range, and the impact characteristics tend to be good. The propylene content can be adjusted by controlling the concentration ratio of propylene and ethylene during the polymerization of the propylene-ethylene random copolymer portion.

The molecular weight of the propylene-ethylene random copolymer part of the b unit part is not particularly limited, but when considering dispersibility and impact resistance, the weight average molecular weight (Mw) is preferably 200,000 to 3,000,000. 000, more preferably 300,000 to 2,500,000, still more preferably 400,000 to 2,000,000.
The amount of the a unit part and the b unit part is not particularly limited, but in general, the a unit part is preferably 95% by weight or less, more preferably 50 to 95% by weight, still more preferably 60 to 90% by weight of the total amount. , B unit part is preferably adjusted to 5% by weight or more of the total amount, more preferably 5 to 50% by weight, still more preferably 10 to 40% by weight. The impact resistance characteristics tend to increase as the amount of b unit part is equal to or greater than the lower limit, and the rigidity, strength, and heat resistance tend to increase as the amount is less than the upper limit.

In the present invention, the amount of the b unit part is measured using a temperature rising elution fractionation method. That is, the a unit part does not elute at 100 ° C. or lower in the extraction with orthodichlorobenzene, but the b unit part elutes easily. Therefore, the composition of the propylene-ethylene block copolymer after production is determined by extraction analysis with the orthodichlorobenzene.
Since the ratio of the amount of a unit part and b unit part is determined by the polymerization amount of the propylene homopolymer part and the polymerization amount of the propylene-ethylene random copolymer part, it can be adjusted by controlling the respective polymerization times.

The production method of the propylene homopolymer or the propylene-ethylene block copolymer is not particularly limited, and is appropriately selected from known methods and conditions.
As the polymerization catalyst for propylene, a highly stereoregular catalyst is usually used. For example, a catalyst comprising a combination of a titanium trichloride composition obtained by reducing titanium tetrachloride with an organoaluminum compound and further treating with various electron donors and electron acceptors, an organoaluminum compound and an aromatic carboxylic acid ester ( JP-A 56-1000080, JP-A 56-120712, and JP-A 58-104907), or a supported type in which titanium tetrachloride and various electron donors are brought into contact with magnesium halide. Examples include catalysts (see JP-A-57-63310, JP-A-63-43915, and JP-A-63-83116). Furthermore, a metallocene catalyst as shown in WO91 / 04257 and the like can also be mentioned. The metallocene catalyst may not contain alumoxane, but a catalyst in which a metallocene compound and an alumoxane are combined, that is, a so-called Kaminsky catalyst is preferable.

  The propylene-ethylene block copolymer is obtained by first polymerizing propylene alone in the presence of the catalyst by applying a production process such as a gas phase polymerization method, a liquid phase bulk polymerization method, or a slurry polymerization method, and then propylene and ethylene. Can be obtained by random polymerization. In order to obtain a propylene-ethylene block copolymer having the above-described melting characteristics (MFR), it is preferable to perform multistage polymerization using a slurry method or a gas phase fluidized bed method. Alternatively, it can be obtained by a method in which propylene homopolymerization is performed in multiple stages and then propylene and ethylene are randomly polymerized. When producing a propylene-ethylene block copolymer having a large number of b units, the gas phase fluidized bed method is particularly preferred.

The propylene homopolymer is obtained by polymerizing propylene alone in the presence of the above catalyst by applying a production process such as a phase polymerization method, a liquid phase bulk polymerization method, or a slurry polymerization method. In order to obtain a propylene homopolymer having the above-described melting characteristics (MFR), it is preferable to perform multistage polymerization using a slurry method or a gas phase fluidized bed method.
The propylene homopolymer or propylene-ethylene block copolymer constituting the substrate of the laminate of the present invention is preferably excellent in mechanical properties and high in rigidity and impact resistance in order to be used as a structural material. That is, the flexural modulus is preferably 300 MPa or more, more preferably 500 to 3000 MPa, and still more preferably 1,000 to 2,000 MPa. By being in this range, it will be excellent in rigidity and suitable as a structural material. The IZOD impact strength is preferably 1 kJ / m ² or more, more preferably ^{2 to} 100 kJ / m ² , still more preferably 5 to 80 kJ / m ² , and particularly preferably 8 to 60 kJ / m ² . By making it within this range, it is excellent in impact resistance and suitable as a structural material.
A thermoplastic resin molding may be used individually by 1 type, and may be used in combination of 2 or more type.

[6-3] Inorganic filler component The thermoplastic resin molded article (F) used in the present invention may contain an inorganic filler component.
In particular, by blending an inorganic filler component with crystalline polyolefin, mechanical properties such as flexural modulus and rigidity of the molded product can be improved.
Specifically, plate fillers such as talc, mica and montmorillonite; fiber fillers such as short fiber glass fiber, long fiber glass fiber, carbon fiber, aramid fiber, alumina fiber, boron fiber and zonolite; potassium titanate, magnesium Needle-like fillers such as oxysulfate, silicon nitride, aluminum borate, basic magnesium sulfate, zinc oxide, wollastonite, calcium carbonate, silicon carbide; precipitated calcium carbonate, heavy calcium carbonate, magnesium carbonate, etc. Granular fillers; balun fillers such as glass balloons; Inorganic fillers and pigments such as zinc white, titanium white, and magnesium sulfate can also be used. Of these, talc, mica, glass fiber, and whisker are preferred from the balance between physical properties and cost, and talc, mica, and glass fiber are more preferred.

The inorganic filler component may be surface-treated with a surfactant, a coupling agent or the like. The surface-treated filler has an effect of further improving the strength and heat-resistant rigidity of the molded product.
The amount of the inorganic filler component used is selected from a wide range depending on the purpose and application of the molded product, but is preferably 1 to 80 parts by weight, more preferably 2 to 75 parts by weight, more preferably 100 parts by weight of the crystalline polyolefin. Preferably it is 5-60 weight part.

By including an inorganic filler component, the flexural modulus of the crystalline polyolefin is preferably improved to 1,000 MPa or more, more preferably 1,500 to 10,000 MPa, and even more preferably 2,000 to 8,000 MPa. Can do. The IZOD impact strength can be improved to preferably 1 kJ / m ² or more, more preferably ^{2 to} 80 kJ / m ² , and further preferably 4 to 60 kJ / m ² .
An inorganic filler component may be used individually by 1 type, and may be used in combination of 2 or more type.

Hereinafter, preferred fillers will be described in detail.
(1) Talc The average particle diameter of talc used in the present invention is usually 10 μm or less, preferably 0.5 to 8 μm, more preferably 1 to 7 μm. The average particle size value is a cumulative amount obtained by drawing a particle size cumulative distribution curve from a measurement result obtained by a laser diffraction method (for example, LA920W manufactured by Horiba, Ltd.) or a liquid layer sedimentation method light transmission method (for example, CP type manufactured by Shimadzu Corp.). The particle size value is 50% by weight. The value in the present invention is an average particle diameter value measured by a laser diffraction method.

As the talc, fine particles obtained by further finely classifying naturally-produced talc that has been mechanically pulverized are used. What was once coarsely classified may be further classified.
Examples of the mechanical crushing method include a method using a crusher such as a jaw crusher, a hammer crusher, a roll crusher, a screen mill, a jet crusher, a colloid mill, a roller mill, and a vibration mill. The pulverized talc is subjected to wet or dry classification once or repeatedly in an apparatus such as a cyclone, a cyclone air separator, a micro separator, or a sharp cut separator to adjust the average particle size.

As a method for producing talc used in the present invention, it is preferable to perform a classification operation with a sharp cut separator after pulverization to a specific particle size.
These talcs are modified polyolefins, fatty acids grafted with various organic titanate coupling agents, organic silane coupling agents, unsaturated carboxylic acids or anhydrides for the purpose of improving the adhesion or dispersibility with the polymer. The surface treatment may be performed with a fatty acid metal salt, a fatty acid ester, or the like.

(2) Glass fiber It is common to use glass chopped strand as glass fiber. The length of the glass chopped strand is usually 3 to 50 mm, and the fiber diameter is usually 3 to 25 μm, preferably 8 to 14 μm.
As the glass chopped strand, it is preferable to use a surface-modified one with a silane compound or a surface treatment with a sizing agent such as polyvinyl alcohol, polyvinyl acetate, polyurethane, epoxy resin, or an olefin component.

Examples of the olefinic component as the sizing agent include unsaturated carboxylic acid-modified polyolefins and polyolefin low molecular weight substances.
In the present invention, a polyolefin modified with an unsaturated carboxylic acid and / or a derivative thereof may be blended in order to improve the mechanical strength by interfacial adhesion between the crystalline polyolefin and the glass fiber. In particular, those obtained by modifying polypropylene as a base material are preferred, and those having a modification rate of 0.1 to 10% by weight are preferred.

(3) Mica Mica preferably has an average particle size of 2 to 100 μm and an average aspect ratio of 10 or more, more preferably an average particle size of 2 to 80 μm and an average aspect ratio of 15 or more. When the average particle diameter of the mica is within the above range, the scratch resistance and impact strength of the molded product can be further improved and deterioration of the appearance can be suppressed.

The mica may be so-called white mica, gold mica, black mica, etc., but gold mica and white mica are preferable, and white mica is more preferable.
The method for producing mica is not particularly limited, and the mica is produced by a method according to the aforementioned talc. However, dry pulverization / wet classification or wet pulverization / wet classification is preferable, and wet pulverization / wet classification is more preferable.

[6-4] Elastomer Component When the thermoplastic resin molded body (F) used in the present invention is a crystalline polyolefin molded body, an elastomer component can be further contained. Thereby, the impact strength of the molded product can be improved.

  Examples of the elastomer component include ethylene-α-olefin random copolymer rubber, ethylene-α-olefin-nonconjugated diene copolymer rubber, and styrene-containing thermoplastic elastomer. Specific examples include ethylene-α-olefin copolymer rubbers such as ethylene-propylene copolymer rubber, ethylene-1-butene copolymer rubber, ethylene-1-hexene copolymer rubber, and ethylene-1-octene copolymer rubber. Polymer rubber; ethylene-α-olefin-nonconjugated diene copolymer rubber such as ethylene-propylene-ethylidene norbornene copolymer rubber (EPDM); hydrogenated product of styrene-butadiene-styrene triblock (SEBS), styrene -Styrene-containing thermoplastic elastomer such as hydrogenated product (SEPS) of isoprene-styrene triblock body can be exemplified.

These elastomers can be produced as follows.
The MFR (230 ° C., 2.16 kg load) of these elastomer components is preferably 0.5 to 150 g / 10 min, more preferably 0.000 when considering the automobile exterior material which is one of the main uses of the present invention. It is 7-100 g / 10min, More preferably, it is 0.7-80g / 10min.
An elastomer component may be used individually by 1 type, and may be used in combination of 2 or more type.

[6-5] Other components In addition to the above, the thermoplastic resin molded article (F) can contain arbitrary additives and blending components as long as the effects of the present invention are not significantly impaired. Specifically, pigments for coloring, antioxidants such as phenols, sulfurs and phosphoruss, antistatic agents, light stabilizers such as hindered amines, ultraviolet absorbers, various nucleating agents such as organic aluminum and talc, dispersion Agents, neutralizers, foaming agents, copper damage inhibitors, lubricants, flame retardants, and other resins such as polyethylene resins.

[6-6] Method for Producing Thermoplastic Resin Molded Body (F) Various components are blended in the resin described above as necessary, and mixed and melt-kneaded. The kneading method is not particularly limited, and the heat of the present invention is obtained by kneading and granulating using a normal kneader such as a single screw extruder, a twin screw extruder, a Banbury mixer, a roll mixer, a Brabender plastograph, and a kneader. The thermoplastic resin composition which comprises a plastic resin molding (F) is obtained. In order to improve the dispersion of each component, a twin screw extruder is preferably used.

When kneading and granulating, the above components may be kneaded at the same time, or a method of kneading the components separately may be employed in order to improve performance.
Next, the thermoplastic resin composition is molded to obtain a thermoplastic resin molded body (F), and various known methods can be used as the molding method.
Examples include injection molding (including gas injection molding), compression molding, injection compression molding (press injection), extrusion molding, hollow molding, rotational molding, calendar molding, inflation molding, uniaxially stretched film molding, biaxially stretched film molding, and the like. It is done. Injection molding, compression molding, and injection compression molding are preferably used, and injection molding is particularly preferable in consideration of productivity and the like.

[6-7] Use of Laminate The laminate of the present invention has excellent physical properties balance such as excellent adhesion of a coating film, rigidity and impact resistance. In addition, when the resin layer constituting the laminate does not substantially contain a surfactant, no bleed out occurs and the appearance is excellent. Moreover, since it is not necessary to contain halogens, such as chlorine, an environmental load can be reduced.
Therefore, the laminate of the present invention can be used for various industrial parts such as automobiles, home appliances, and building materials, and in particular, has performance sufficient for practical use as parts / materials that are thinned, highly functional, and large. . Similarly, it can be used as a living material such as a film or a sheet.

  For example, automobile parts such as bumpers, instrument panels, trims, garnishes, TV cases, washing machine tanks, refrigerator parts, air conditioner parts, vacuum cleaner parts and other household appliance parts, toilet seats, toilet seat lids, water tanks and other toiletry parts, It can be used as a molding material for various industrial parts such as parts around the bathroom such as a bathtub, bathroom wall, ceiling, and drain pan, and as various living materials such as a packaging material, an agricultural film, a gas barrier film, and synthetic paper.

EXAMPLES Next, although an Example demonstrates this invention further in detail, this invention is not restrict | limited to a following example, unless the summary is exceeded. In the following, when “part” is simply written, it means “part by weight”.
<Physical property measurement method and evaluation method>
(1) Stereoregularity The propylene content [P] in the propylene-butene copolymer was measured by a ¹³ C-NMR spectrum measurement method using an NMR apparatus (manufactured by JEOL Ltd., 400 MHz). 350-500 mg of sample was completely dissolved in about 10 ml of a sample tube for NMR using about 2.2 ml of orthodichlorobenzene. Next, about 0.2 ml of deuterated benzene was added as a lock solvent, and the mixture was homogenized. Then, measurement was performed at 130 ° C. by a complete proton decoupling method. The measurement conditions were a pulse angle of 90 °, a pulse interval of 10 seconds, and a cumulative number of 6000 times.
The chemical shift and content of propylene and butene were calculated with reference to the description of JCRandall, Macromolecules, 11, 592 (1978).

(2) Weight average molecular weight [Mw] and molecular weight distribution [Mw / Mn]
(2) -1 Method for measuring molecular weight in terms of polypropylene First, 20 mg of a sample was collected in a 30 ml vial, and 20 g of orthodichlorobenzene containing 0.04% by weight of BHT was added as a stabilizer. After dissolving the sample using an oil bath heated to 135 ° C., it was filtered hot with a PTFE (polytetrafluoroethylene) filter having a pore diameter of 3 μm to prepare a sample solution having a polymer concentration of 0.1% by weight. Next, GPC measurement was performed by using TSKgel GM H-HT (30 cm × 4) as a column and Waters GPC150CV equipped with an RI detector. As measurement conditions, the injection amount of the sample solution: 500 μl, column temperature: 135 ° C., solvent: orthodichlorobenzene, flow rate: 1.0 ml / min were employed.

In calculating the molecular weight, a commercially available monodispersed polystyrene is used as a standard sample, and a calibration curve relating to the retention time and molecular weight is prepared from the polystyrene standard sample and the viscosity formula of polypropylene, and the propylene-α-olefin copolymer The molecular weight was calculated.
[Η] = K · M ^α is used as the viscosity formula, K = 1.38E-4 and α = 0.70 for polystyrene, and K for propylene-α-olefin copolymer. = 1.03E-4, α = 0.78 was used.
Moreover, molecular weight distribution Mw / Mn was computed from the value of the obtained weight average molecular weight Mw and number average molecular weight Mn.

(2) -2 Method for measuring molecular weight in terms of polystyrene First, 5 mg of a sample was collected in a 10 ml vial, 5 g of tetrahydrofuran containing 250 ppm of BHT was added as a stabilizer, and completely dissolved at 50 ° C. After cooling to room temperature, the mixture was filtered through a filter having a pore diameter of 0.45 μm to prepare a sample solution having a polymer concentration of 0.1% by weight. Next, GPC measurement was performed using a GPC HLC-8020 manufactured by Tosoh Corporation in which a guard column TSK guard column H _XL- H was attached to TSK gel GMH _XL- L (30 cm × 2) as a column. As measurement conditions, an injection amount of the sample solution: 50 μl, a column temperature: 40 ° C., a solvent: tetrahydrofuran, and a flow rate of 1.0 ml / min were employed.
When calculating the molecular weight, a commercially available monodisperse polystyrene standard sample was measured as a standard sample, and a calibration curve was created from the retention time and molecular weight of the standard sample.

(3) Temperature rising elution fractionation method (TREF)
A sample was dissolved in orthodichlorobenzene (containing 0.5 mg / ml BHT (2,6-di-t-butyl-4-methylphenol)) at 140 ° C. to prepare a solution. After this was introduced into a 140 ° C. TREF column, it was cooled to 100 ° C. at a rate of 8 ° C./min, subsequently cooled to −15 ° C. at a rate of 4 ° C./min, and held for 60 minutes. Thereafter, orthodichlorobenzene (containing 0.5 mg / ml BHT) as a solvent is passed through the column at a flow rate of 1 ml / min, and the components dissolved in orthodichlorobenzene at −15 ° C. are eluted in the TREF column for 10 minutes. I let you. Next, the column was linearly heated to 140 ° C. at a temperature increase rate of 100 ° C./hour, and the elution amount was detected at 0.1 ° C. intervals. From the obtained results, the integrated elution amount (% by weight) for each temperature was calculated.

The measurement apparatus and measurement conditions are shown below.
・ Measurement device (TREF part)
TREF column: 4.3 mmφ × 150 mm stainless steel column Column packing material: 100 μm surface inactive glass beads Heating method: Aluminum heat block Cooling method: Peltier element (Peltier element is cooled by water)
Temperature distribution: ± 0.5 ° C
Temperature controller: Chino Corporation Digital Program Controller KP1000
(Valve oven)
Heating method: Air bath oven Measurement temperature: 140 ° C
Temperature distribution: ± 1 ° C
Valve: 6-way valve, 4-way valve (sample injection part)
Injection method: Loop injection method Injection amount: Loop size 0.1ml
Inlet heating method: Aluminum heat block Measurement temperature: 140 ° C
(Detection unit)
Detector: Fixed wavelength infrared detector FOXBORO MIRAN 1A
Detection wavelength: 3.42 μm
High temperature flow cell: LC-IR micro flow cell, optical path length 1.5 mm,
Window shape 2φ × 4mm oval, synthetic sapphire window Measurement temperature: 140 ° C
(Pump part)
Liquid feed pump: manufactured by Senshu Kagaku Co., Ltd. SSC-3461 pump / measurement conditions Solvent: orthodichlorobenzene (with 0.5 mg / ml BHT)
Sample concentration: 5 mg / ml
Sample injection volume: 0.1 ml
Solvent flow rate: 1 ml / min

(4) Melting point [Tm] and heat of crystal melting [ΔH]
Measurement was performed using a differential scanning calorimeter DSC 220C manufactured by Seiko Instruments Inc.
A sample of 5 ± 1 mg was placed in an Al pan, covered with Al, and an empty Al pan was used as a reference and placed on the detector. The temperature was raised to 200 ° C. at a rate of 100 ° C./min. After maintaining at the same temperature for 5 minutes, it was cooled at a rate of 10 ° C./min, and the amount of heat was detected at 0.5 second intervals to −10 ° C. After maintaining at the same temperature for 1 minute, the temperature was raised to 200 ° C. at a rate of 10 ° C./minute, and the amount of heat was detected at 0.5 second intervals.
In each sample, one exothermic peak was observed in the cooling process, and one endothermic peak was observed in the last temperature raising process. The temperature at the peak top of the peak in the final temperature raising process was defined as the melting point [Tm], and the heat of crystal fusion [ΔH] was calculated from the area of the peak surrounded by the line connecting the peaks.

(5) Graft rate 200 mg of the polymer and 4800 mg of chloroform were placed in a 10 ml sample bottle and heated at 50 ° C. for 30 minutes to be completely dissolved. Chloroform was placed in a liquid cell having a material NaCl and an optical path length of 0.5 mm as a background. Next, the dissolved polymer solution was put into a liquid cell, and an infrared absorption spectrum was measured using FT-IR460plus manufactured by JASCO Corporation at a total number of 32 times. The graft ratio of maleic anhydride was calculated using a calibration curve prepared by measuring a solution of maleic anhydride in chloroform. Then, from the area of the absorption peak of the carbonyl group (maximum peak in the vicinity of 1780 cm ⁻¹ , 1750 to 1813 cm ⁻¹ ), the acid component content in the polymer is calculated based on a separately prepared calibration curve, and the graft ratio ( % By weight).

(6) Dispersion particle diameter It measured using Nikkiso Co., Ltd. Microtrac UPA (model 9340 batch type dynamic light scattering method / laser Doppler method). Measured with a dispersion time of 0.9 g / cm ³ , a particle shape of a true sphere, a particle refractive index of 1.50, a dispersion medium of water, and a dispersion medium of 1.33, with a measurement time of 120 seconds. In terms of volume, the 50% particle diameter and 90% particle diameter were determined cumulatively from the finer particle diameter.

(7) Adhesion (7) -1
A substrate (test piece) was produced by injection-molding an automotive exterior grade polypropylene into 70 mm × 150 mm × 3 mm, and the substrate surface was wiped with isopropyl alcohol. Here, the sample was spray coated so that the coating amount (dry weight after coating) was about 15 g / m ² . Next, the coated specimen was dried and baked at 80 ° C. for 40 minutes in a safe ben dryer to obtain a coated plate.
After leaving at 23 ° C. for 24 hours, a test piece with 25 squares (5 × 5) grids was prepared at intervals of 2 mm according to the grid pattern test method described in JIS K 5400, and cellophane tape (Nichiban) The product was peeled in the direction of 90 degrees and evaluated by the number of grids that were not peeled out of the 25 grids.

(7) -2
A substrate (test piece) was produced by injection-molding an automotive exterior grade polypropylene into 70 mm × 150 mm × 3 mm, and the substrate surface was wiped with isopropyl alcohol. Here, the sample was spray coated so that the coating amount (dry weight after coating) was about 10 g / m ^2, and dried in a safe ben dryer at 80 ° C. for 5 minutes. Next, an acrylic polyol urethane paint [Letane PG80III: manufactured by Kansai Paint Co., Ltd.], in which a predetermined amount of a curing agent is blended and the viscosity is adjusted with a dedicated thinner, is applied onto the test piece after application. It spray-coated so that it might become 30 g / m < ² >, and it baked for 30 minutes at 90 degreeC in the safe ben dryer, and obtained the coating board.

  After leaving at 23 ° C. for 24 hours, a test piece having a grid of 25 squares (5 × 5) was prepared at intervals of 2 mm in accordance with the grid test method described in JIS K 5400, and cellophane tape (Nichiban) After attaching the product, it was peeled in the direction of 90 degrees, and the number of grids that were not peeled out of the 25 grids was evaluated.

(8) Gasohol resistance test Adhesion test (7) -2: A mixed solution of regular gasoline and ethanol maintained at 20 ° C. (weight ratio: regular gasoline: ethanol = 9: 1) The time until the film was immersed and peeled off was measured and evaluated as follows.
◎: 60 minutes or more ○: 15 minutes or more and less than 60 minutes △: 5 minutes or more and less than 15 minutes ×: Less than 5 minutes

(9) Coating film physical properties The substrate used in the adhesion test (7) -2 was wiped with isopropyl alcohol. Here, the sample was spray coated so that the coating amount (dry weight after coating) was about 10 g / m ² and dried at 80 ° C. for 30 minutes in a safe ben dryer to obtain a test piece. After this test piece was allowed to stand at 40 ° C. for 3 days, bleed-out and tackiness were evaluated.
-Bleed-out As a result of visually observing the coating test piece and observing the appearance of the surfactant bleed-out on the surface of the coating film, it was determined as follows.
○: No bleed-out of surfactant △: Slightly bleed-out of surfactant ×: Slightly bleed-out of surfactant ・ Tackiness Judged as follows.
○: Even if touched with a finger, there is no tack ×: Touched with a finger causes a tack

(10) Heat seal test and peel strength Homopolypropylene (manufactured by Nippon Polypro Co., Ltd., MA3U) was molded to produce a polypropylene film having a thickness of 100 μm. Here, 10 g of the emulsion whose solid content concentration was adjusted to 25% by weight was diluted by adding 5 g of isopropyl alcohol, so that the coating amount (dry weight after coating) was about 3 g / m ^2. No.) and dried in a safe ben dryer at 80 ° C. for 3 minutes. Next, the same polypropylene film was stacked thereon, and heat sealing was performed at a temperature of 120 ° C., a pressure of 2 kg / cm ³ , and a pressurization time of 5 seconds.
The heat-sealed laminate was allowed to stand at 23 ° C. for 4 hours, then cut to a width of 15 mm to obtain a test piece. A 180 ° T-peel test was performed at a peel rate of 300 mm / min to evaluate the peel strength.
-Blocking resistance The same polypropylene film is overlaid on the film on which the emulsion has been applied and dried in the same manner as in the peel test, and after applying a load of 0.1 kg / cm ² at 23 ° C, the film is peeled off by hand and blocked. Sex was evaluated as follows.
○: No blocking Δ: Slightly blocking ×: There is blocking, and the films are adhered to each other

  Hereinafter, the propylene content, Mw (polypropylene equivalent), Mw / Mn (polypropylene equivalent), melting point Tm, crystal melting heat amount ΔH, temperature rising elution of the copolymer (A) and other polymers used in Examples and Comparative Examples The amount of elution at 60 ° C. or lower in the fractionation method is shown in Table 1.

[Example 1]
Into a glass flask equipped with a reflux condenser, thermometer and stirrer, 650 g of toluene and 350 g of propylene-butene copolymer (Mitsui Chemicals, Tuffmer XM7070; Copolymer 1) are placed, and the inside of the container is replaced with nitrogen gas. The temperature was raised to 110 ° C. After raising the temperature, 35 g of maleic anhydride was added, 10.7 g of t-butyl peroxyisopropyl monocarbonate (Perbutyl I manufactured by NOF Corporation) was added, and the reaction was continued by stirring at the same temperature for 10 hours. After completion of the reaction, the system was cooled to near room temperature, acetone was added, and the precipitated polymer was filtered off. Further, precipitation and filtration were repeated with acetone, and the finally obtained polymer was washed with acetone. The polymer obtained after washing was dried under reduced pressure to obtain a maleic anhydride-modified polymer in the form of a white powder. As a result of measuring the infrared absorption spectrum of this modified polymer, the content (graft ratio) of maleic anhydride groups was 2.1% by weight (0.21 mmol / g as maleic anhydride groups, 0.42 mmol / as carboxylic acid groups). g). Moreover, the weight average molecular weight was 110,000 (polypropylene conversion) and 171,000 (polystyrene conversion), and the number average molecular weight was 90,000 (polystyrene conversion).

  Next, 30 g (maleic anhydride group content: 6.3 mmol) of the obtained maleic anhydride-modified polymer and 70 g of toluene were added to a glass flask equipped with a reflux condenser, a thermometer, and a stirrer, and the temperature was adjusted to 110 ° C. The temperature was raised and the solution was completely dissolved. Subsequently, 6 g (6 mmol, copolymer (A) 100 parts by weight of methoxypoly (oxyethylene / oxypropylene) -2-propylamine (polyetheramine manufactured by Huntsman; Jeffamine M-1000, molecular weight 1,000 (nominal value)) Solution corresponding to 20 parts by weight of the hydrophilic polymer (B) in toluene was added and reacted at 110 ° C. for 1 hour. Thereafter, 0.53 g (6 mmol) of morpholine was added and reacted at 110 ° C. for 1 hour.

A small amount was collected from the reaction solution, toluene was distilled off under reduced pressure, and infrared absorption spectrum analysis was performed. As a result, 90% of the peak corresponding to maleic anhydride near 1784 cm ⁻¹ disappeared, and the maleic anhydride-modified polymer and polyether It was observed that the amine was bound. A graft copolymer in which polyetheramine is graft-bonded to the maleic anhydride-modified polymer is formed.

  The temperature of the obtained reaction liquid was kept at 60 ° C., and a mixed liquid of 120 g of isopropanol and 30 g of water was added dropwise over 1 hour with heating and stirring to obtain a light yellowish liquid. Further, a mixed solution of 30 g of isopropanol and 160 g of water was added dropwise over 1 hour while keeping the temperature of the reaction solution at 60 ° C., and a translucent yellow solution was obtained. This was cooled to 45 ° C., and the degree of vacuum was gradually reduced from 0.02 MPa to 0.004 MPa, and toluene, isopropanol and water were distilled off under reduced pressure until the polymer concentration reached 25% by weight. A dispersion was obtained. It seems to be transparent because the dispersed particle size is fine.

  As a result of measuring the dispersed particle size, the 50% particle size was 0.099 μm, and the 90% particle size was 0.184 μm. The results of evaluating the adhesion of the obtained aqueous resin dispersion are shown in Table 2. In addition, about adhesiveness, it evaluated by the method of (7) -1. In addition, the propylene content, Mw, Mw / Mn, melting point Tm, heat of crystal melting ΔH, elution at 60 ° C. or lower in the temperature rising elution fractionation method of the propylene-butene copolymer used (Mitsui Chemicals, Tafmer XM7070) Indicates the amount.

  The methoxypoly (oxyethylene / oxypropylene) -2-propylamine (polyetheramine manufactured by Huntsman; Jeffamine M-1000) used in Example 1 was dissolved in water at 25 ° C. at a concentration of 10% by weight. Sometimes the insoluble content is 1% by weight or less, and it is a hydrophilic polymer.

[Comparative Example 1]
A maleic anhydride-modified polymer was obtained in the same manner as in Example 1 except that Tuffmer XR110T (copolymer 6) manufactured by Mitsui Chemicals was used as the propylene-butene copolymer. The content (graft ratio) of maleic anhydride groups was 2.0% by weight (0.20 mmol / g as maleic anhydride groups and 0.40 mmol / g as carboxylic acid groups).
Subsequently, preparation of an aqueous resin dispersion was attempted in the same manner as in Example 1, but a large amount of precipitates having a particle size exceeding 1 mm was observed, and no resin dispersion was obtained.

[Example 2]
(Melt modification process)
After dry blending 200 kg of propylene-butene copolymer (manufactured by Mitsui Chemicals, Tafmer XM7070; copolymer 1) and 5 kg of maleic anhydride with a super mixer, a twin screw extruder (TEX54αII manufactured by Nippon Steel Works) was used. While feeding perbutyl I with a liquid pump so as to be 1 part by weight per 100 parts by weight of propylene-butene copolymer, the cylinder temperature of the kneading part is 200 ° C., the screw rotation speed is 125 rpm, and the discharge amount is 80 kg / hour. The mixture was kneaded under conditions to obtain a pellet-shaped product.
The maleic anhydride group content (graft ratio) of the maleic anhydride-modified propylene-butene copolymer thus obtained was 0.8% by weight (0.08 mmol / g as maleic anhydride group, as carboxylic acid group). 0.16 mmol / g). The weight average molecular weight was 156,000, and the number average molecular weight was 84,000 (both in terms of polystyrene).

(Solution denaturation process)
Next, a reflux condenser, a thermometer, a nitrogen gas blowing pipe and a stirrer were installed in a 2 L glass flask equipped with a bottom extraction valve and an oil circulation jacket heater, and then 150 g of the above maleic anhydride-modified propylene-butene copolymer. And 150 g of toluene were charged, and the mixture was heated and stirred until it reached 110 ° C. while blowing nitrogen gas.
After raising the temperature, 2.25 g of maleic anhydride was added and dissolved, 0.75 g of perbutyl I was added, and stirring was continued at the same temperature for 7 hours. Thereafter, 0.5 g of the solution was extracted, acetone was added, the precipitated polymer was filtered, and precipitation and filtration were further repeated with acetone, and the finally obtained polymer was dried under reduced pressure. The content (graft ratio) of maleic anhydride groups of this modified polymer was 1.5% by weight (0.15 mmol / g as maleic anhydride groups and 0.30 mmol / g as carboxylic acid groups). The weight average molecular weight was 146,000, and the number average molecular weight was 77,000 (both in terms of polystyrene).

(Emulsification process)
Next, 129 g of toluene was added to the solution for dilution, and then tetrakis [methylene-3- (3 ′, 5′-di-t-butyl-4′-hydroxyphenyl) propionate] methane (Irganox 1010 manufactured by Ciba Specialty Chemicals) ) 0.075 g was added. The jacket temperature (external temperature) was lowered to 75 ° C., 15 g of isopropanol was further added and stirred for 1 hour, and then 600 g of hot water at 70 ° C. was added and stirred. After stirring for 15 minutes, the mixture was allowed to stand to separate into two phases, a toluene solution phase at the top and a warm water phase at the bottom, and warm water was extracted from the bottom extraction valve. After the washing operation with warm water was repeated once more, a solution obtained by dissolving 15 g (15 mmol) of Jeffamine M-1000 in 390 g of isopropanol was added dropwise to the toluene solution over 1 hour. Further, an aqueous solution obtained by dissolving 1.5 g (15 mmol) of 90% aqueous solution (AMP90) of 2-amino-2-methyl-1-propanol in 90 g of water was added.

A process of adding a Dean-Stark tube between the reflux condenser and the flask, depressurizing the obtained liquid, distilling 90 g of the solvent, and adding 90 g of water was repeated 5 times. Thereafter, 60 g of water was further added, and toluene, isopropanol, and water were distilled off under reduced pressure until the polymer concentration reached 30% by weight to obtain a white aqueous dispersion.
Table 3 shows the evaluation results of the dispersed particle size, coating film properties, adhesion, and gasohol resistance of the obtained aqueous resin dispersion. In addition, about adhesiveness, it evaluated by the method of (7) -2.

[Example 3]
All operations were performed in the same manner as in Example 2 except that the amount of Jeffamine M-1000 used was changed from 15 g to 22.5 g (22.5 mmol) to obtain a light yellowish water dispersion.
The evaluation results of the obtained aqueous resin dispersion are shown in Table-3.

[Example 4]
All operations were performed in the same manner as in Example 2 except that the amount of Jeffamine M-1000 used was changed from 15 g to 30 g (30 mmol) to obtain a light yellowish water dispersion.
The evaluation results of the obtained aqueous resin dispersion are shown in Table-3.

[Example 5]
All except that the hydrophilic polymer to be used is Surfonamine L-200 (Polyetheramine manufactured by Huntsman, molecular weight 2,000) instead of Jeffamine M-1000, and the amount used is 45 g (22.5 mmol). The same operation as in Example 2 was performed to obtain a milky white aqueous dispersion.
The evaluation results of the obtained aqueous resin dispersion are shown in Table-3.

[Example 6]
A melt modification step was performed in the same manner as in Example 2 to obtain a maleic anhydride-modified propylene-butene copolymer having a maleic anhydride group content of 0.8% by weight and a weight average molecular weight of 156,000.
Next, after a reflux condenser, a thermometer, a nitrogen gas blowing tube, and a stirrer were installed in a 1 L glass flask, 200 g of the maleic anhydride-modified propylene-butene copolymer and 200 g of toluene were charged and 110 g of nitrogen gas was blown. The mixture was heated and stirred until the temperature reached 0 ° C.
After raising the temperature, 10 g of maleic anhydride and 3.0 g of perbutyl I were added. Thereafter, this operation was repeated 3 times every 30 minutes (total 4 times), and the reaction was continued by stirring at the same temperature for 7 hours.

After completion of the reaction, the reaction solution temperature (internal temperature) was cooled to 50 ° C., and 600 g of acetone was added dropwise over about 1 hour to obtain a light red suspension. After removing the liquid with a suction filter, the remaining white solid was suspended in 500 g of acetone and stirred for 30 minutes. After removing the liquid again with a suction filter, it was placed in a vat coated with Teflon (registered trademark) and dried in a vacuum dryer at 60 ° C. to obtain a modified polymer.
The content (graft ratio) of maleic anhydride groups of this modified polymer is 5.8% by weight (0.58 mmol / g as maleic anhydride groups and 1.16 mmol / g as carboxylic acid groups), and the weight average molecular weight is 89 The number average molecular weight was 44,000 (both in terms of polystyrene).

150 g of this maleic anhydride-modified propylene-butene copolymer and 500 g of THF were charged into a 2 L glass flask equipped with a reflux condenser, a thermometer, and a stirrer, heated, and completely dissolved at 65 ° C. To the obtained solution, 33 g (0.37 mol) of morpholine was added and stirred at the same temperature for 30 minutes. Next, 500 g of water was added over 2 hours to obtain a pale yellow solution.
At a jacket temperature (external temperature) of 60 ° C., the obtained liquid was decompressed, and THF and a part of water were distilled off under reduced pressure to obtain an aqueous dispersion having a polymer concentration of 30 wt%.
The evaluation results of the obtained aqueous resin dispersion are shown in Table-3.

[Example 7]
A propylene-butene copolymer (Mitsui Chemicals, Tuffmer XM7080; Copolymer 2) was subjected to a melt modification step under the same conditions as in Example 2. The resulting maleic anhydride-modified propylene-butene copolymer has a maleic anhydride group content (graft ratio) of 0.8% by weight, a weight average molecular weight of 158,000, and a number average molecular weight of 91,000 (both in terms of polystyrene). Met.

Next, the solution modification step and the emulsification step were performed under the same conditions as in Example 3. The resulting modified polymer had a maleic anhydride group content (graft ratio) of 1.5% by weight (0.15 mmol / g as maleic anhydride group, 0.30 mmol / g as carboxylic acid group), and a weight average molecular weight of 148. , And a number average molecular weight of 78,000 (both in terms of polystyrene), and the resulting aqueous dispersion was a light yellowish tinge.
The evaluation results of the obtained aqueous resin dispersion are shown in Table-3.

[Example 8]
In a 1 L glass flask equipped with a reflux condenser, thermometer, and stirrer, 150 g of toluene and 100 g of propylene-ethylene copolymer (Clariant, Lycocene PP1502; copolymer 3) are placed, and the inside of the container is replaced with nitrogen gas. The temperature was raised to 110 ° C. After the temperature increase, 5.0 g of maleic anhydride was added, 2.0 g of perbutyl I was further added, and the reaction was continued for 10 hours at the same temperature. After completion of the reaction, the system was cooled to near room temperature, acetone was added, and the precipitated polymer was filtered off. Further, precipitation and filtration were repeated with acetone, and the polymer obtained after washing was dried under reduced pressure to obtain a maleic anhydride-modified polymer in the form of a white powder. The content (graft ratio) of maleic anhydride groups in this modified polymer was 1.3% by weight (0.13 mmol / g as maleic anhydride groups and 0.26 mmol / g as carboxylic acid groups). The weight average molecular weight was 45,000, and the number average molecular weight was 27,000 (both in terms of polystyrene).

  Next, in a 1 L glass flask equipped with a reflux condenser, a thermometer, and a stirrer, the obtained maleic anhydride-modified polymer 40 g (content of maleic anhydride group 10.4 mmol), Irganox 1010 0.02 g and toluene 60 g Was added and heated to 110 ° C to dissolve, and the jacket temperature (outside temperature) was lowered to 70 ° C. A solution prepared by dissolving 6 g (6 mmol) of Jeffamine M-1000 in 200 g of isopropanol was added dropwise over 1 hour.

Thereafter, an aqueous solution in which 0.4 g (4 mmol) of N, N-dimethylethanolamine was dissolved in 40 g of water was added. Next, after a Dean-Stark tube was installed between the reflux condenser and the flask, the pressure was reduced, 40 g of the solvent was distilled off, and the step of adding 40 g of water was repeated 5 times. Thereafter, toluene, isopropanol and water were distilled off under reduced pressure until the polymer concentration reached 30% by weight to obtain a white aqueous dispersion.
The evaluation results of the obtained aqueous resin dispersion are shown in Table-3.

[Example 9]
A 2L glass flask equipped with a bottom extraction valve and an oil circulation jacket heater was equipped with a reflux condenser, thermometer, nitrogen gas blowing pipe and stirrer, and then chlorinated propylene-ethylene copolymer (copolymer 4, chlorine (Content 27% by weight) 100 g and 150 g of toluene were charged and heated and stirred until the temperature reached 110 ° C. while blowing nitrogen gas.
After heating, 5.0 g of maleic anhydride was added and dissolved, then 2.0 g of perbutyl I was added, and stirring was continued for 7 hours at the same temperature. Thereafter, 0.5 g of the solution was extracted, acetone was added, the precipitated polymer was filtered, and precipitation and filtration were further repeated with acetone, and the finally obtained polymer was dried under reduced pressure. The content (graft ratio) of maleic anhydride groups of this modified polymer was 0.9% by weight (0.09 mmol / g as maleic anhydride groups and 0.18 mmol / g as carboxylic acid groups). The weight average molecular weight was 93,000, and the number average molecular weight was 58,000 (both in terms of polystyrene).

  Next, 50 g of toluene was added to the solution for dilution, and 0.05 g of Irganox 1010 was added. The jacket temperature (external temperature) was lowered to 70 ° C., and 600 g of warm water at 70 ° C. was added and stirred. After stirring for 15 minutes, the mixture was allowed to stand and hot water was extracted from the bottom extraction valve. After the washing operation with warm water was repeated once more, a solution of 20 g (20 mmol) of Jeffamine M-1000 dissolved in 250 g of isopropanol was dropped into the solution over 1 hour. Further, an aqueous solution in which 1.0 g (10 mmol) of AMP90 was dissolved in 60 g of water was added.

A process of installing a Dean-Stark tube between the reflux condenser and the flask, depressurizing the obtained liquid, distilling 60 g of the solvent, and adding 60 g of water was repeated 5 times. Thereafter, toluene, isopropanol and water were distilled off under reduced pressure until the polymer concentration reached 30% by weight to obtain a pale yellow aqueous dispersion.
The evaluation results of the obtained aqueous resin dispersion are shown in Table-3.

[Comparative Example 2]
Maleic acid modification and emulsification were performed in the same manner as in Example 9 except that a propylene-butene-ethylene copolymer (Degussa Japan Co., Ltd., Bestplast 708; Copolymer 5) was used as the polyolefin. The content (graft ratio) of maleic anhydride groups in this modified polymer was 1.3% by weight (0.13 mmol / g as maleic anhydride groups and 0.26 mmol / g as carboxylic acid groups). The weight average molecular weight was 56,000, and the number average molecular weight was 22,000 (both in terms of polystyrene). A milky white aqueous dispersion was obtained, but a large amount of agglomerates were generated during the emulsification, which was removed with a 400 mesh wire mesh and used for performance evaluation.
The evaluation results of the obtained aqueous resin dispersion are shown in Table-3.

[Comparative Example 3]
20 g of the maleic anhydride-modified propylene-butene copolymer obtained in the melt modification step of Example 2 and 60 g of toluene were placed in a container, the inside of the container was replaced with nitrogen gas, and the temperature was raised to 75 ° C. to dissolve. After dissolution and cooling to 50 ° C., 5 g of polyoxyethylene cetyl ether (nonionic surfactant, Emulgen 220 manufactured by Kao Corporation, HLB = 14.2) and polyoxyethylene alkyl ether (nonionic surfactant, Kao) Emulgen 1118S70 (70% aqueous solution), HLB = 16) (7.1 g, 5.0 g as a surfactant component) was added and dissolved.

While maintaining the temperature at 50 ° C., 12 g of distilled water was added thereto, followed by emulsification with a homomixer at 12000 rpm for 5 minutes. Subsequently, an aqueous solution diluted with AMP90 (0.4 g) and water (150 g) was added to the system to adjust the pH to 8. The crude emulsion was gradually reduced in pressure at a temperature of 50 ° C., and toluene and water were distilled off to obtain a milky white resin dispersion having a polymer concentration of 25% by weight.
The evaluation results of the obtained aqueous resin dispersion are shown in Table-3.

[Comparative Example 4]
(1) Chemical treatment of clay mineral Demineralized water (125 ml), lithium sulfate monohydrate (19.3 g) and sulfuric acid (29.8 g) were collected in a 300 ml round bottom flask and dissolved under stirring. In this solution, commercially available granulated montmorillonite (Menzawa Chemical Co., Ltd. Benclay SL, 33.5 g) was dispersed, heated to boiling over 10 minutes, and stirred at the boiling point (105 ° C.) for 300 minutes. Thereafter, 200 ml of demineralized water was added and cooled, and the resulting slurry was filtered to collect a wet cake. The collected cake was slurried again with demineralized water (800 ml) in a 1,000 ml beaker and filtered. This operation was repeated twice. The finally obtained cake was dried under air at 100 ° C. for 3 hours to obtain chemically treated montmorillonite (25.9 g).

(2) Prepolymerization The chemically treated montmorillonite (2.0 g) obtained in (1) above was dried under reduced pressure at 200 ° C. for 2 hours. To this was added a toluene solution of trioctylaluminum (0.5 mmol / ml, 5.7 ml), and the mixture was stirred at 60 ° C. for 40 minutes. Toluene (30 ml) was added to this suspension, and after stirring, the supernatant was removed. This operation was repeated twice to obtain a clay slurry.
In another flask, Tosoh Akzo triisobutylaluminum (0.076 mmol) and dichloro {1,1′-dimethylsilylene [2-methyl-1-indenyl] [2-methyl-4-phenyl-4H-azurenyl] ]} Adjusted to hafnium (exo-syn / exo-anti = 5/5 (mol ratio) (manufacturing method: see JP-A-2005-48033)) (26.7 mg, 37.9 μmol) is added and reacted in advance. The whole amount of the complex solution was added to the clay slurry and stirred at room temperature for 1 hour, toluene (15 ml) was added to the suspension, and after stirring, the supernatant was removed. Thus, a catalyst slurry was obtained.
Next, the entire amount of the catalyst slurry was introduced into an induction stirring autoclave having an internal volume of 2 liters. Toluene (100 ml) containing triisobutylaluminum (0.35 mmol) was introduced, and liquefied propylene (35 ml) was introduced into the autoclave at 35 ° C., and prepolymerization was performed at 35 ° C. for 30 minutes. The obtained prepolymerized catalyst slurry was recovered in a 200 ml round bottom flask, and after removing the supernatant, it was washed with toluene (80 ml) containing triisobutylaluminum (0.016 mmol). This prepolymerized catalyst contained 5.1 g of polypropylene per 1 g of the solid catalyst component.

(3) Propylene Polymerization 105 g of isotactic polypropylene dried at 100 ° C. was introduced as a dispersant in an induction stirring autoclave having an internal volume of 2 liters, and purged with nitrogen under reduced pressure. Thereafter, triisobutylaluminum (0.25 mmol) was introduced, and 83.7 mg of the prepolymerized catalyst as a solid catalyst component was introduced into a catalyst feeder mounted in the autoclave. The autoclave was heated, the prepolymerized catalyst was introduced into the autoclave from the catalyst feeder at 50 ° C., and further heated while introducing propylene. After raising the temperature to 75 ° C., the pressure was 1.9 MPa, and the reaction was continued for 60 minutes at the same temperature. During the reaction, propylene gas was introduced so that the pressure was constant. After completion of the reaction, the unreacted monomer was purged to terminate the polymerization, and the initially introduced isotactic polypropylene was removed by sieving to obtain 53 g of stereoblock polypropylene (polymer 7) having physical properties shown in Table-1. The MFR of this product was 28.2 g / 10 min.

(4) Modification, emulsification In a 1 L glass flask equipped with a reflux condenser, a thermometer, and a stirrer, 186 g of toluene and 100 g of stereoblock polypropylene (polymer 7, stereoregularity: 79 mol% of isotactic pentad) were added. The inside of the container was replaced with nitrogen gas, and the temperature was raised to 110 ° C. After raising the temperature, 6 g of maleic anhydride was added, 2.0 g of perbutyl I was added, and the reaction was continued for 7 hours at the same temperature. After completion of the reaction, the mixture was cooled to 80 ° C., acetone was added, and the precipitated polymer was separated by filtration. Further, precipitation with acetone and filtration were repeated. The polymer obtained after washing was dried under reduced pressure to obtain white powdery maleic anhydride-modified polypropylene. Since this maleic anhydride-modified polypropylene did not dissolve in chloroform, a film was molded at 200 ° C. using a 0.1 mm spacer. The content (graft ratio) of maleic anhydride groups was 1.5% by weight (0.15 mmol / g as maleic anhydride groups and 0.3 mmol / g as carboxylic acid groups).

  Next, 30 g (maleic anhydride group content 4.5 mmol) of the obtained maleic anhydride-modified polypropylene and 70 g of toluene were added to a glass flask equipped with a reflux condenser, a thermometer, and a stirrer. Since the temperature was raised to 70 ° C. but did not dissolve, the temperature was raised to 110 ° C. and completely dissolved. Next, a solution prepared by dissolving 6 g (6 mmol) of Jeffamine M-1000 in 6 g of toluene was added and reacted at 110 ° C. for 1 hour.

After cooling the temperature of the obtained reaction liquid to 80 degreeC, the liquid mixture of 120 g of isopropanol and 30 g of water was dripped over 1 hour. Further, when a mixed solution of 30 g of isopropanol and 160 g of water was dropped over 1 hour while keeping the temperature of the reaction solution at 80 ° C., a suspension in which a large amount of agglomerated particles were deposited was obtained. At the same temperature, the pressure reduction degree was gradually reduced from 0.02 MPa to 0.004 MPa, and toluene, isopropanol and water were distilled off under reduced pressure until the polymer concentration reached 30% by weight to obtain a cloudy liquid.
The aggregate was filtered through a 400-mesh wire mesh and dried under reduced pressure at 80 ° C. for 4 hours to obtain 25.8 g of a white solid. Most of the cloudy liquid was particles of 10 μm or more.
The molecular particle size was not measurable and could not be evaluated afterwards.

<Heat seal test>
The heat-sealability of the aqueous resin dispersions obtained in Examples 8 and 9 and Comparative Examples 2 and 3 was evaluated. The evaluation results are shown in Table-4.
It was confirmed that the aqueous resin dispersions of Examples 8 and 9 had high peel strength, good blocking resistance, and were excellent as a heat seal adhesive.

The resin dispersion of the present invention is extremely useful as a surface treatment agent, an adhesive, a coating agent, a paint, and the like for an olefin polymer having crystallinity. Moreover, the laminated body of this invention is excellent in coating-film adhesiveness, and can be applied to a wide range of industrial products.

Claims (19)

A polymer (C) formed by bonding a hydrophilic polymer (B) or an acidic group to a propylene-α-olefin copolymer (A) which is a copolymer of propylene and an α-olefin other than propylene, A resin dispersion obtained by dispersing in 50% particle diameter 0.5 μm or less in water,
The propylene content of the copolymer (A) is 50 mol% or more and less than 100 mol%, the weight average molecular weight Mw of the copolymer (A) is 10,000 or more, and the molecular weight distribution Mw / Mn is 3.5 or less. And
The resin dispersion, wherein the surfactant content of the resin dispersion is 15 parts by weight or less with respect to 100 parts by weight of the polymer (C).   The resin dispersion according to claim 1, wherein the copolymer (A) is produced using a single site catalyst.   The resin dispersion according to claim 1 or 2, wherein the copolymer (A) is a propylene-butene copolymer.   The resin dispersion according to any one of claims 1 to 3, wherein the copolymer (A) has a melting point Tm of 100 ° C or less and a heat of crystal fusion ΔH of 60 J / g or less.   The resin dispersion according to any one of claims 1 to 4, wherein 95% by weight or more of the copolymer (A) is eluted at 60 ° C or lower in a temperature rising elution fractionation method.   The resin dispersion according to any one of claims 1 to 5, wherein the copolymer (A) does not substantially contain chlorine.   The resin dispersion according to any one of claims 1 to 6, wherein the polymer (C) is dispersed in water with a 50% particle diameter of 0.3 µm or less.   Is the polymer (C) formed by bonding the hydrophilic polymer (B) to the copolymer (A) at a ratio of (A) :( B) = 100: 1 to 100: 500 (weight ratio)? Or the resin dispersion of any one of Claims 1 thru | or 7 which an acidic group couple | bonds.   The resin dispersion according to any one of claims 1 to 8, wherein the polymer (C) is obtained by bonding at least the hydrophilic polymer (B) to the copolymer (A).   The resin dispersion according to claim 9, wherein the polymer (C) is a graft copolymer in which a hydrophilic polymer (B) is graft-bonded to the copolymer (A).   The resin dispersion according to claim 9 or 10, wherein the polymer (C) is obtained by bonding 0.01 to 5 mmol of the hydrophilic polymer (B) per 1 g of the copolymer (A).   The resin dispersion according to any one of claims 9 to 11, wherein the hydrophilic polymer (B) is a polyether resin.   The resin dispersion according to any one of claims 9 to 12, wherein the hydrophilic polymer (B) has one or more reactive groups per molecule.   The resin dispersion according to claim 13, wherein the hydrophilic polymer (B) has at least an amino group as a reactive group.   The resin dispersion according to any one of claims 1 to 14, which is substantially free of a surfactant.   A paint comprising the resin dispersion according to any one of claims 1 to 15.   The hydrophilic polymer (B) is bonded to the propylene-α-olefin copolymer (A), which is a copolymer of propylene and an α-olefin other than propylene, on the thermoplastic resin molded body (F). Or a polymer (C) formed by bonding an acidic group, wherein the copolymer (A) has a propylene content of 50 mol% or more and less than 100 mol%, and the weight average molecular weight of the copolymer (A) A laminate having a resin layer having an Mw of 10,000 or more, a molecular weight distribution Mw / Mn of 3.5 or less, and a surfactant content of 15 parts by weight or less with respect to 100 parts by weight of the polymer (C).   A resin layer is formed by applying the resin dispersion according to any one of claims 1 to 15 or the paint according to claim 16 to the thermoplastic resin molding (F) and heating. Laminated body.   A laminate of a laminate in which the thermoplastic resin molded body (F) is coated with the resin dispersion according to any one of claims 1 to 15 or the paint according to claim 16 and heated to form a resin layer. Production method.