JPH08208907A - Thermoplastic resin composition, its production and molding material - Google Patents

Abstract

PURPOSE: To obtain a thermpolastic resin composition excellent in strengths, rigidity and heat resistance, being non-water-absorptive and suited for molding by mixing a propylene polymer with a polyamide resin and a radical polymerization initiator such as a hydroximic acid derivative. CONSTITUTION: A proplylene polymer (A) is mixed with a polyamide (B) and a radical polymerization initiator (C) such as a hydroximic acid derivative having a structure represented by the formula, the mixture is dry-blended, and melt-kneaded to obtain a molding material. Component C is used in an amount of 0.01-5 pts.wt. per 100 pts.wt. composition comprising 5-95wt.% component A and 95-5wt.% component B. Component A is modified one having improved compatibility with component B and prepared by melt-kneading a propylene polymer in the presence of a stabilizer, a polar-group-containing vinyl monomer, an aromatic vinyl monomer and a radical polymerization initiator such as an alkyl perester. It is desirable that component B is nylon 6 or nylon 66. An example of component C is ethyl-o-benzoyldodecane hydroximate.

Description

Detailed Description of the Invention

[0001]

The present invention relates to an excellent weld strength and impact resistance which comprises a propylene polymer (A), a polyamide resin (B) and a radical initiator (C) having a specific bond in the molecular structural formula. TECHNICAL FIELD The present invention relates to a thermoplastic resin composition having properties, rigidity, heat resistance and non-water absorbability, and also excellent in moldability, a method for producing the same, and a molding material.

[0002]

2. Description of the Related Art Polyamide resin is widely used as an engineering resin in various mechanical parts materials because of its excellent wear resistance, electrical characteristics, heat resistance and mechanical strength. Is insufficient and has a high water absorption. In particular, water absorption is a problem, and the water-absorbed polyamide resin is not preferable because bubbles tend to be whitened when molding is performed, and not only the mechanical strength is significantly lowered by water absorption but also the dimensional change and Problems such as deformation also occur. Since the polyamide resin has such drawbacks, its application as an engineering resin is limited, and it is often impossible to take advantage of the excellent characteristics inherent to the polyamide resin.

On the other hand, polypropylene has a low specific gravity and shows almost no water absorption, but its mechanical strength,
In particular, there is a drawback that the physical properties at high temperature are insufficient.

Therefore, attempts have been made to use polyamide resins and polypropylene in combination in order to improve the drawbacks of these resins. However, even if the polyamide resin and the polypropylene are simply blended by melt-kneading or the like, the compatibility between the two is poor, so that layer peeling occurs and only a product having poor surface gloss and mechanical strength can be obtained. To improve this compatibility, for example, a composition using polypropylene obtained by modifying a part or all of polypropylene with carboxylic acid or its anhydride (Japanese Patent Publication No. 45-
30943, JP-A-60-118735), and a composition using polypropylene obtained by further modifying the acid-modified polypropylene with a silane compound (Japanese Patent Publication No.
No. 74698) has been proposed.

However, although these conventional compositions are improved in compatibility by the inclusion of modified polypropylene, the effect of improving mechanical properties such as strength is not always sufficient.

We have previously solved the problems of these conventional compositions and obtained a resin composition having the excellent heat resistance and mechanical strength of a polyamide resin and the low water absorption properties of polypropylene. As a blended modified polyamide resin and a modified propylene-based polymer resin obtained by melt-kneading polymerization of an aromatic vinyl monomer and a polar functional group-containing vinyl monomer in the presence of a propylene-based polymer in a molten state. It has been proposed that the above-mentioned object can be achieved by doing so (Japanese Patent Laid-Open No. 5-287163). A similar composition is also proposed in JP-A-6-16899.

[0007] However, although the above proposal shows an effect of improving mechanical properties such as water absorption or bending strength, the composition is thickened depending on the use, so that moldability is deteriorated. It wasn't always enough. Therefore, as a means to eliminate this deterioration of molding processability,
It has been proposed to use an organic peroxide together when compounding a polar functional group-containing vinyl monomer-modified propylene polymer resin and a polyamide resin (Japanese Patent Application No. 6-193309).
Although this proposal suppresses the thickening of the composition and the effect of improving the mechanical properties is seen, the weld strength, which is said to be a defect of the microdispersion type alloy, is not yet sufficiently improved.

[0008]

DISCLOSURE OF THE INVENTION The present invention solves the problem of poor weld strength, which is a problem of conventional compositions, and improves the compatibility between polyamide resin and polypropylene, thereby making polyamide resin excellent. Another object of the present invention is to obtain a resin composition having excellent abrasion resistance, electrical characteristics, heat resistance, mechanical strength, and low water absorption property of polypropylene and having excellent moldability.

[0009]

Means for Solving the Problems As a result of intensive studies to solve the above-mentioned drawbacks, the present inventors have found that when a propylene polymer and a polyamide resin are blended, they are specified in the molecular structural formula. It was found that the above object can be achieved by using a radical initiator having a bond in combination, and the present invention has been completed.

That is, in the present invention, the propylene-based polymer (A) and the polyamide resin (B), and the following in the molecular structural formula

[0011]

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A thermoplastic resin composition comprising a radical initiator (C) having a bond of, preferably the radical initiator (C) is a hydroxyamic acid derivative, preferably a propylene-based polymer. Combined (A) 5-95
% To 100 parts by weight of a resin composition consisting of 95 to 5% by weight of polyamide resin (B), and 0.01 to 1 parts by weight of a radical initiator (C) having a bond of the above chemical formula 3 in the molecular structural formula. That, preferably propylene-based polymer is a polar functional group-containing vinyl monomer modified propylene-based polymer, preferably a polar functional group-containing vinyl monomer (a-2),
A thermoplastic resin composition characterized by being a carboxyl group-containing vinyl monomer or an epoxy group-containing vinyl monomer, and a polar functional group-containing vinyl monomer-modified propylene polymer (A) and a polyamide resin (B ) When kneading with

[0013]

[Chemical 4] The present invention provides a method for producing a thermoplastic resin composition, which is carried out in the presence of a radical initiator (C) having the above-mentioned bond, and a molding material using the same. The present invention will be described in detail.

(Constitution) The propylene polymer (A) of the present invention is a propylene homopolymer and a copolymer mainly composed of propylene and another olefin or an ethylenic vinyl monomer (preferably propylene 75 weight%
The above copolymers), and specifically include isotactic polypropylene, propylene-ethylene copolymer, propylene-butene copolymer, modified propylene-based polymer, and the like. Two or more kinds of these propylene-based polymers may be mixed and used. Further, other polymers can be used as long as the properties of the propylene polymer are not impaired. Its shape is granular, powder, flake, granule,
It may be in the form of a porous body. The modified propylene polymer (a) is preferred.

The modified propylene polymer (a) is preferably a product obtained by modifying the unmodified propylene polymer (A) with a polar functional group-containing vinyl monomer (a-2),
Any propylene-based polymer having a polar functional group may be used. Particularly preferably an unmodified propylene-based polymer obtained by polymerizing both an aromatic vinyl monomer (a-1) and a polar functional group-containing vinyl monomer (a-2),
The aromatic vinyl monomer (a-1) and the polar functional group-containing vinyl monomer (a-2) are graft-polymerized with a propylene-based polymer. The aromatic vinyl monomer (a-1) -derived component in the modified propylene polymer (a) is preferably 50% by weight or less, more preferably 1 to 35% by weight, and the polar functional group-containing vinyl monomer ( The a-2) -derived component is preferably 10% by weight.
Below, it is more preferably 0.1 to 5% by weight.

The modified propylene-based polymer (a) can be produced by a method in which the propylene-based polymer (A) in the form of granules, powder, flakes, granules, or a porous material is unmodified and aromatic vinyl is used. Monomer and polar functional group-containing vinyl monomer (a
-2) is impregnated with a radical polymerization initiator (a-3), a polymerization reaction method of irradiating high-energy ionizing radiation under an inert gas, etc., but any other method may be used, but preferably in powder or pellet form. The crystalline propylene-based polymer is melted by supplying the propylene-based polymer to an extruder and pressurizing, preferably by heating to 130 to 250 ° C., and containing the aromatic vinyl monomer (a-1) and a polar functional group. Vinyl monomer (a-2)
Is preferably a method of performing a melt-kneading polymerization reaction in the presence of a radical initiator, a method of cooling the strand discharged from the die, and making a pellet by using a pelletizer.

The polar functional group-containing vinyl monomer (a-2) used for modification is a copolymerizable epoxy group-containing vinyl monomer, hydroxyl group-containing vinyl monomer, or carboxyl group-containing vinyl monomer. , Oxazoline group-containing vinyl monomers and the like. Preferred are carboxyl group-containing vinyl monomers and epoxy group-containing vinyl monomers.

The carboxyl group-containing vinyl monomer includes, for example, acrylic acid, methacrylic acid, maleic anhydride, maleic acid and the like and alkyl esters thereof.
These may be used alone or as a mixture. Of these, maleic anhydride is preferred.

Examples of the hydroxyl group-containing vinyl monomer include 2-hydroxyethyl methacrylate, 2-hydroxypropyl methacrylate, 2-hydroxyethyl acrylate, 2-hydroxypropyl acrylate and 2
-Hydroxybutyl methacrylate and the like can be used alone or in combination.

As the epoxy group-containing vinyl monomer, for example, glycidyl methacrylate, glycidyl acrylate, allyl glycidyl ether, methacryl glycidyl ether and the like can be used alone or in combination. Of these, glycidyl methacrylate is preferable.

Examples of the vinyl monomer containing an oxazoline group include 2-vinyl-2-oxazoline, 2-vinyl-4-methyl-2-oxazoline, 2-isopropenyl-2-oxazoline and 2-isopropenyl-4-oxazoline.

The aromatic vinyl monomer (a-1) used in combination with the polar functional group-containing vinyl monomer (a-2) is, for example, styrene, methylstyrene, vinyltoluene, vinylxylene, ethylvinylbenzene. , Isopropyl styrene,
Chlorostyrene, dichlorostyrene, bromostyrene and the like can be mentioned, and they can be used alone or in combination. Of these, styrene is preferable.

The amount of the aromatic vinyl monomer (a-1) added is
The propylene polymer content is preferably 50% by weight or less, more preferably 1 to 35% by weight. If it exceeds 50% by weight, the performance of polypropylene is impaired, which is not preferable. Further, the aromatic vinyl monomer (a-1) is added with a polar functional group-containing vinyl monomer (a-2) in order to prevent the modified propylene polymer from having a low molecular weight and improve the compatibility with the polyamide resin. It is preferable to add at least the same amount or more, preferably 1 to 5 times the amount.

The addition amount of the polar functional group-containing vinyl monomer (a-2) is preferably 10% by weight or less, more preferably 0.1 to 5% by weight, based on the propylene polymer. If it exceeds 10% by weight, not only the modified propylene polymer may have a low molecular weight but also the adhesiveness, water absorption and mechanical properties of the composition may be adversely affected, which is not preferable.

The radical initiator (a-3) used for producing the modified propylene polymer (a) is an aromatic vinyl monomer.
Since it is easily dissolved in (a-1) and the reaction is carried out at an abnormal melt-kneading temperature of the propylene-based polymer, the decomposition temperature for obtaining a half-life of 1 minute is 130 to 250 ° C. desirable. Specifically, alkyl peresters such as tert-butyl peroxy-2-ethylhexanoate and tert-butyl peroxybenzoate, 1,1-ditertiary butyl peroxy-3,
Peroxyketals such as 3,5-trimethylcyclohexane, 2,2-bis (4,4-ditertiarybutylperoxycyclohexyl) propane, ketone peroxides such as cyclohexanone peroxide, benzoyl peroxide, 2,4- Diacyl peroxides such as dichlorobenzoyl peroxide, tertiary butyl peroxyisopropyl carbonate, percarbonates such as diethylene glycol-bis (tertiary butyl peroxy carbonate), 2,4
Hydroperoxides such as 4-trimethylperoxy-2-hydroperoxide, dicumyl peroxide, 2,5-dimethyl-2,5-di- (tert-butylperoxy) hexane, 2,5-dimethyl- Two
5-di- (tert-butylperoxy) hexyne-
Examples thereof include dialkyl peroxides such as 3, α, α′-bis- (tertiarybutylperoxyisopropyl) benzene and the like. These may be used alone or in combination of two or more.

The amount of the radical initiator (a-3) used is preferably 0.1 based on 100 parts by weight of all vinyl monomers.
-10 parts by weight, more preferably 1 to 5 parts by weight.

As other additives, a polypropylene polymer is a radical-disintegrating polymer unlike polyethylene, so that it is preferable to add a stabilizer. However, it is necessary to consider the type and addition amount so as not to hinder the polymerization of the aromatic vinyl monomer (a-1). For example, pentaerythrityl-tetrakis ((di-t-butyl-hydroxyphenyl) propionate), ocdecyl (di-t-butyl-).
Hydroxyphenyl) propionate, thiobis (methyl t-butylphenol), hindered phenolic stabilizers such as trimethyl-tris (di-t-butylhydroxybenzyl) benzene, tetrakis (di-t-butylphenyl) biphenylene phosphite, tris (di-t-diphenyl) t-
Phosphorus stabilizers such as butyl phenyl) phosphite, metal soaps such as zinc stearate and calcium stearate,
There are antacid adsorbents such as magnesium oxide and hydrotalcite. The amount of the stabilizer used is 100% propylene-based polymer.
The amount is preferably 0.01 to 1 part by weight, and more preferably 0.05 to 0.5 part by weight.

Aromatic vinyl monomer in propylene-based polymer
(a-1) and polar functional group-containing vinyl monomer (a-2) in the melt-kneading polymerization reaction, preferably using a closed container such as a Banbury mixer, a continuous kneader such as an extruder it can. The extruder is more preferable than the industrial production such as granulation. Furthermore, the twin-screw extruder supplies the reactants,
It is easier to control kneading, polymerization time, etc.

The vinyl monomer may be mixed with the propylene-based polymer in advance and then supplied to the extruder,
Although it may be supplied to the propylene-based polymer in a molten state using a liquid feeder, it is preferable that the propylene-based polymer is mixed and impregnated in advance.

The above-mentioned radical initiator (a-3) may be added by dissolving it in a vinyl monomer in advance, or by adding it to a mixture of a propylene polymer and a vinyl monomer using a liquid feeder. You may. The stabilizer is preferably mixed in advance with the propylene polymer by using a Henschel mixer or the like.

Since the propylene-based polymer is a radical-disintegrating polymer unlike the ethylene-based polymer, if the polymer is simply melt-heated, the molecular weight is apt to decrease due to the breaking of the main chain.
Therefore, even if the polar functional group-containing vinyl monomer (a-2) is melt-kneaded in the presence of the organic peroxide, a modified propylene polymer having a low molecular weight can be obtained. However, according to the melt-kneading reaction method, the aromatic vinyl monomer (a-1) and the polar functional group-containing vinyl monomer (a-2) are efficiently reacted by reacting in the presence of a stabilizer. It is possible to obtain a modified propylene-based polymer (a) having improved compatibility with the polyamide resin (B) without lowering the molecular weight after the graft reaction.

The polyamide resin (B) of the present invention is a polymer compound having an acid amide (-CONH-) as a repeating unit, which is obtained by ring-opening polymerization of lactam depending on the polymerization mode.
Examples thereof include those obtained by polycondensation of diamine and dibasic acid and those obtained by polycondensation of aminocarboxylic acid. They are,
It has a common name of nylon, such as nylon 6, nylon 12, nylon 46, nylon 11, nylon 6
6, nylon 610, semi-aromatic nylon and the like can be exemplified, but among these, nylon 6 and nylon 66 are preferable. Although the molecular weight of the polyamide resin (B) is not particularly limited, a resin having a relative viscosity (η _rel ) of preferably 0.5 or more, more preferably 2.0 or more is usually used.

The radical initiator (C) of the present invention has the following formula in the molecular structural formula.

[0034]

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Compounds having a bond of, preferably, those referred to as hydroxamic acid derivatives. As a method for producing the radical initiator (C), a known method can be used, for example, by reacting a nitrile with an alcohol in the presence of an acid to give an imidate, and reacting the imidate with a hydroxyamine salt. Hydroxymic acid derivatives can be obtained. Some radical initiators (C) are commercially available, and it is convenient to use the commercially available products as they are. Specific examples of the radical initiator (C) include ethyl-O-benzoyldodecanehydroxymate, ethyl-O-benzoyllaurohydroxymate, methyl-O-2,4-dichlorobenzoylpivalohydroxymate, t-butyl-O. -Benzoyl-n-
Butyl hydroxymate, propyl-O- (cyclohexyloxycarbonyl) -benzohydroxymate, ethyl-O-phenoxyacetyldodecanehydroxymate, t-butyl-O-benzoylacetohydroxymate, cumyl-O-methylacetohydroxymate, allylaceto Examples thereof include hydroxymate, cyclohexyl benzohydroxylate, ethyl dodecane hydroxymate and the like. These may be used alone or in combination of two or more. Other radical initiators may be used in combination to the extent that the effect of improving the weld strength of the present invention is not impaired.

The amount of the radical initiator (C) used is preferably 0.01 to 5 relative to 100 parts by weight of the resin composition.
It is good to set it as a weight part, More preferably, it is 0.03 to 1 weight part.

The composition of the present invention is preferably a propylene-based polymer (A) containing the above-mentioned modified propylene-based polymer, preferably 5
To 95% by weight, more preferably 20 to 85% by weight, polyamide resin (B) preferably 95 to 5% by weight, more preferably 80 to 15% by weight, and radical initiator (C) preferably 0.01 to 5% by weight. Parts by weight, more preferably 0.03 to
1 part by weight. If the propylene-based polymer (A) is less than 5% by weight in the composition, the propylene-based polymer (A)
Therefore, the effect of improving low water absorption and molding processability cannot be obtained. On the other hand, if the polyamide resin (B) is less than 5% by weight, the effect of improving the abrasion resistance, mechanical properties, heat distortion resistance, etc. by the polyamide resin cannot be obtained. On the other hand, radical initiator (C)
If it is less than 0.01 parts by weight, the effect of improving weld strength and moldability cannot be obtained, and if it is more than 5 parts by weight, mechanical properties such as impact resistance and heat deformability are adversely affected.

In addition to these essential components, additional components can be added to the composition of the present invention within a range that does not impair the effects of the invention. Examples of the additional components include other thermoplastic resins, rubbers, inorganic fillers, pigments, various stabilizers (antioxidants, light stabilizers, antistatic agents, antiblocking agents, lubricants) and the like. In that case, the timing of addition may be either first mixing with the propylene-based polymer or modified propylene-based polymer (A) or after mixing with the polyamide resin (B).

The composition of the present invention is produced by dry blending these components with a Henschel mixer, a V blender, a ribbon blender, a tumbler blender, etc.
This mixture is melt-mixed with a kneading machine such as a single-screw or twin-screw extruder, a roll, a Banbury mixer, pelletized or crushed, and then subjected to molding. As the molding method, any method such as injection molding, blow molding, extrusion molding and the like can be adopted.

Although the details of how the radical initiator (C) acts in the composition of the present invention are not clear,
It is considered that the radical initiator (C) used in the present invention has a higher decomposition temperature than conventionally known organic peroxides and efficiently acts on a polymer having a relatively high melting point such as nylon. By doing so, the composition of the present invention is a non-water-absorbing, heat-resistant, rigid, moisture-proof, coating properties, excellent balance, excellent thermoplastic resin composition particularly excellent weld strength and molding processability. Can be

[0041]

EXAMPLES The present invention will be described in more detail with reference to Examples and Comparative Examples. However, the following examples and comparative examples do not limit the present invention in any way. In the following, all "parts" and "%" are based on weight unless otherwise specified.

The test methods for the physical properties of the composition and the target physical properties are as follows. Melt index: JIS K7210 (2.16kg, 235 ° C) Moldability target 5-20 Layered peeling: The molded product is immersed in toluene to visually judge the presence or absence of layered heat resistance: Measurement JIS K7202 (Vicat softening temperature) Load 5kg) Target 130 ℃ or more Flexural modulus: Measured ASTM D790 Target 1.7 × 10 ⁴ kg
/ Cm ² or more weld strength: measured ASTM D256 Izod impact value (23 ℃)
Target 10 or above Impact strength: Measured ASTM D256 Izod impact value (23 ° C, with notch) Target 9 or above Water absorption rate: Calculated by the following formula after 120 hours immersion at 23 ° C using injection-molded test pieces (104 × 50 × 2mm)

[0043]

Reference Example 1 <Production of Modified Propylene Polymer> A 30 mm twin-screw extruder manufactured by Brabender (Germany) was set to a barrel temperature of 200 ° C. (however, a feeder section 180 ° C.) and a die temperature of 210 ° C. Powdered polypropylene (Hipol B200
P, manufactured by Mitsui Petrochemical Co., Ltd.) 1000 parts Irganox 1
0.5 parts of 010 (stabilizer manufactured by Ciba-Gaiki), 0.5 part of phosphite 168 (stabilizer manufactured by Ciba-Gaiki), and 1 part of calcium stearate (stabilizer) were mixed. This formulation is referred to as "stabilizer blended PP". 45 parts of styrene,
A mixture of 15 parts of maleic anhydride and 1.8 parts of Perhexin 25B (organic peroxide manufactured by NOF CORPORATION) was dry blended with 940 parts of the above-mentioned "Stabilizer blended PP". The obtained dry blend was supplied to an extruder, melt-kneaded at 15 rpm to carry out a graft reaction, and the strand was cut with a pelletizer to obtain 950 parts of product pellets. The obtained pellet is called "modified PP1".

The styrene content of "modified PP1" was 700 cm ^-1 (attributable to styrene) by infrared spectroscopic analysis of the product.
The styrene content was 4.4% from the calibration curve using the ratio of ¹ to 1380 cm ^-1 (attributable to polypropylene). Furthermore, in order to determine the presence or absence of grafting of the styrene component, polypropylene is not dissolved, but polystyrene is put into tetrahydrofuran as a solvent that dissolves polystyrene, Soxhlet extraction is performed under reflux, and the residual ratio of the styrene part in the pellet is determined. When the graft ratio was also measured, it was 5
5%.

Reference Example 2 A mixture of 50 parts of styrene, 20 parts of glycidyl methacrylate and 2.1 parts of Perhexin 25B (organic peroxide manufactured by NOF CORPORATION) was dried to 930 parts of the above-mentioned "PP containing stabilizer". Blended. The obtained dry blend was supplied to an extruder, melt-kneaded at 15 rpm to carry out a graft reaction, and the strand was cut with a pelletizer to obtain 960 parts of product pellets. The obtained pellet is called "modified PP2".

Reference Example 3 A mixture of 60 parts of styrene, 40 parts of methacrylic acid, and 3 parts of Perhexin 25B (Nippon Oil & Fats Co., Ltd. organic peroxide) was used as the "stabilizer blended PP" 900.
Part was dry blended. The obtained dry blend was supplied to an extruder, melt-kneaded at 15 rpm to carry out a graft reaction, and the strand was cut with a pelletizer to obtain 950 parts of product pellets. The obtained pellet is referred to as "modified PP3".

(Example 1) A 30 mm twin-screw extruder manufactured by Brabender (Germany) was set to a barrel temperature of 240 ° C (however, a feeder section of 180 ° C) and a die temperature of 250 ° C. Polypropylene (Mitsui Petrochemical, Hypol B20
0) 400 parts and nylon-6 (Kanebo Nylon MC)
(112 L) and 600 parts of ethyl-O-benzoyldodecanehydroxymate (manufactured by Akzo Chemical Co., Ltd., referred to as Initiator 1) were mixed and kneaded into pellets by using the above twin-screw extruder. . Using the IS50AM injection molding machine manufactured by Toshiba, test pieces were prepared from the obtained pellets at a resin temperature of 250 ° C., and various physical properties were evaluated. The results are shown in Table 1.
It was shown to.

Example 2 Polypropylene (manufactured by Mitsui Petrochemical Co., Ltd., Hypol B in the production of the composition of Example 1)
200) 400 parts and Nylon-6 (Kanebo Nylon MC112L) 600 parts instead of 300 parts "modified PP1" obtained in Reference Example 1 and Nylon-6 (Kanebo MC112L) 700 parts and ethyl-O. -A composition was prepared using 2 parts of benzoyldodecane hydroxymate (Initiator 1 manufactured by Akzo Chemical Co., Ltd.), and various physical properties were evaluated in the same manner as in Example 1. The results are shown in Table 1.

(Example 3) Polypropylene (manufactured by Mitsui Petrochemical Co., Ltd., Hypol B in the production of the composition of Example 1)
200) 400 parts and nylon-6 (Kanebo Nylon MC112L) 600 parts, 700 parts of "modified PP2" obtained in Reference Example 2 and nylon-6 (Kanebo MC112L) 400 parts and ethyl-O. -Benzoyl laurohydroxymate (manufactured by Akzo Chemical Co., initiator 2
2 parts) to produce a composition, and various physical properties were evaluated in the same manner as in Example 1. The results are shown in Table 1.

Example 4 A 30 mm twin-screw extruder manufactured by Brabender (Germany) was set to a barrel temperature of 270 ° C. (however, a feeder section 180 ° C.) and a die temperature of 280 ° C. 400 parts of "modified PP1" obtained in Reference Example 1 and nylon-
66 (ULSFRAMID112 manufactured by BASF) 600
And 3 parts of ethyl-O-benzoyl laurohydroxymate (manufactured by Akzo Chemical Co., Ltd., referred to as Initiator 2),
This was kneaded and pelletized by using the above twin-screw extruder. Using the IS50AM injection molding machine manufactured by Toshiba, test pieces were prepared from the obtained pellets at a resin temperature of 280 ° C., and various physical properties were evaluated. The results are shown in Table 1.

Example 5 In the production of the composition of Example 4, 400 parts of "modified PP1" and nylon-66 (BAS
Instead of using 600 parts of ULFRAMID112 manufactured by Company F, 300 parts of "modified PP3" obtained in Reference Example 3 and nylon-66 (ULTRAMID11 manufactured by BASF Corporation).
2) A composition was prepared by using 700 parts and 3 parts of butyl-O-acetylbenzohydroxymate (Initiator 3, manufactured by Akzo Chemical Co., Ltd.), and various physical properties were evaluated in the same manner as in Example 4. The results are shown in Table 1.

Comparative Example 1 Instead of using 2.5 parts of ethyl-O-benzoyldodecanehydroxymate (initiator 1 manufactured by Akzo Chemical Co., Ltd.) in the preparation of the composition of Example 1, Perkadox 14 ( A composition was prepared using 2 parts of Kayaku Akzo Co., Ltd. organic peroxide, referred to as PO, and various physical properties were evaluated in the same manner as in Example 1. The results are shown in Table 2.

(Comparative Example 2) Polypropylene (manufactured by Mitsui Petrochemical Co., Ltd., Hypol B in the production of the composition of Example 1)
200) 400 parts and nylon-6 (Kanebo Nylon MC112L) 600 parts instead of using "modified PP1" 300 parts obtained in Reference Example 1 and nylon-6 (Kanebo MC112L) 700 parts, radical A composition was produced without using an initiator, and various physical properties were evaluated in the same manner as in Example 1. The results are shown in Table 2.

COMPARATIVE EXAMPLE 3 Polypropylene (manufactured by Mitsui Petrochemical Co., Ltd., Hypol B in the production of the composition of Example 1)
200) 400 parts and nylon-6 (Kanebo Nylon MC112L) 600 parts, 700 parts of "modified PP2" obtained in Reference Example 2 and Nylon-6 (Kanebo MC112L) 300 parts, and Perkadox 14
A composition was produced using 3 parts of an organic peroxide manufactured by Kayaku Akzo Co., Ltd. (referred to as PO), and various physical properties were evaluated in the same manner as in Example 1. The results are shown in Table 2.

(Comparative Examples 4 and 5) In the preparation of the composition of Example 1, instead of using 400 parts of polypropylene (Hipol B200 manufactured by Mitsui Petrochemical Co., Ltd.) and 600 parts of nylon-6 (nylon MC112L manufactured by Kanebo Co., Ltd.), physical properties were used. For the purpose polyamide resin (Kanebo Nylon MC112
L) and polypropylene resin (HIPOL B200, manufactured by Mitsui Petrochemical Co., Ltd.) were used alone to prepare a composition, and various physical properties were evaluated in the same manner as in Example 1. The results are shown in Table 2.

[0057]

[Table 1]

[0058]

[Table 2]

[0059]

INDUSTRIAL APPLICABILITY The present invention is a composition comprising a propylene-based polymer, a polyamide resin and a radical initiator having a specific bond in the molecular structural formula, and thus has a specific bond in the molecular structural formula. Thermoplastic molding with a good balance of physical properties, such as excellent mechanical properties such as non-water absorption and impact strength, and heat distortion resistance due to the radical initiator, and particularly excellent weld strength and molding processability useful for precision injection molding of connectors, etc. Material can be provided.

Claims (8)

[Claims] 1. A propylene-based polymer (A), a polyamide resin (B), and a (C) molecular structural formula: A thermoplastic resin composition comprising a radical initiator having a bond of 2. The thermoplastic resin composition according to claim 1, wherein the radical initiator (C) is a hydroxyamic acid derivative. 3. A radical initiator (C) is added to 0.0 to 100 parts by weight of a resin composition consisting of 5 to 95% by weight of a propylene polymer (A) and 95 to 5% by weight of a polyamide resin (B).
The thermoplastic resin composition according to claim 1, which is used in an amount of 1 to 5 parts by weight. 4. The thermoplastic resin composition according to claim 1, wherein the propylene polymer (A) is a polar functional group-containing vinyl monomer-modified propylene polymer (a). 5. The polar functional group-containing vinyl monomer (a-2) is
The thermoplastic resin composition according to claim 4, wherein the thermoplastic resin composition is selected from a carboxyl group-containing vinyl monomer and an epoxy group-containing vinyl monomer. 6. A modified propylene-based polymer (a) is a melt-kneading polymerization reaction of an aromatic vinyl monomer (a-1) and a polar functional group-containing vinyl monomer (a-2) to the propylene-based polymer. The thermoplastic resin composition according to claim 2, wherein the thermoplastic resin composition is a cured product. 7. When melt-kneading the propylene-based polymer (A) and the polyamide resin (B), the following chemical formula is shown in the molecular structural formula: A method for producing a thermoplastic resin composition, which is carried out in the presence of a radical initiator (C) having a bond of 8. A molding material comprising the thermoplastic resin composition according to claim 1.