JPH0556377B2 - - Google Patents

Description

[Detailed description of the invention]

[Industrial Field of Application] The present invention relates to a propylene polymer composition that has excellent coating properties, a good balance of physical properties, and good moldability, appearance, printability, plating properties, etc. Propylene-based polymer resin compositions have excellent balance of physical properties, moldability, and relatively low price, and are widely used in industrial parts such as automobile parts, home appliance parts, and OA equipment parts, as well as various industrial materials. ing. However, as the range of applied products expands, there is a growing demand for more sophisticated designs. For example, interior and exterior parts for automobiles (instrument panels,
trims, fenders, bumpers, spoilers, door plates, etc.), home appliances, OA equipment (TV housings, computer housings, VTR housings, etc.)
A high level of coating performance is required. [Prior Art] Conventionally, methods for improving the paintability of propylene-based resin compositions include adding specific components, such as polyethylene, ethylene-propylene copolymer rubber, various rubbers, ABS resin, special fillers, etc. Attempts have been made to add a specific proportion of
No. 50008, JP 54-37150, JP 54-124050
No., JP-A-55-34271, JP-A-53-64257, JP-A-52-21049, JP-A-57-12046, JP-A-57
-76041, JP-A-57-70141, JP-A-57-
55952, Japanese Unexamined Patent Publication No. 57-159841, etc.). [Problems to be solved by the invention] However, products used in this field tend to have increasingly diversified designs and larger sizes, and products that have a good appearance, moldability, physical property balance, and extremely high coating performance. Materials are required at relatively low prices. On the other hand, in the prior art, in order to improve the coating properties and the balance of physical properties, the amounts of various components that need to be added become too large.
The balance between these various performances has deteriorated, or material costs have been forced to increase significantly. [Means for Solving the Problems] The present invention aims to improve such drawbacks, and by blending a specific propylene/ethylene copolymer with a rubber component, optionally a filler, and an ethylene polymer, an excellent product can be obtained. physical property balance, appearance,
It has been found that it can exhibit high coating performance as well as moldability. Note that the term "paintability" as used herein includes not only the initial adhesion of the coating film but also moisture resistance, hot water resistance, solvent treatment resistance, and the like. That is, the present invention provides (a) an ethylene content of 1 to 30% by weight, an MFR of 0.1 g/10 min or more, a content soluble in xylene at room temperature of 1 to 30% by weight, and a low molecular weight distribution of the soluble content; Propylene and ethylene whose integrated value from the molecular weight side is 2 to less than 6% by weight with a molecular weight up to 1×10 ⁴ , 8% by weight or more with a molecular weight up to 1×10 ^4.5 , and 25% by weight or more with a molecular weight up to 1×10 ⁵ . A propylene polymer comprising 30 to 99% by weight of a polymer, (b) 1 to 40% by weight of a rubber component, (c) 5 to 35% by weight of a filler, and (d) 0 to 50% by weight of an ethylene polymer. It is a composite resin composition. The propylene/ethylene copolymer used in the present invention as component (a) has an ethylene content of 1 to 30% in the entire polymer.
In weight%, and MFR (JIS K7210, 230℃,
2.16Kg) is 0.1g/10 minutes or more, preferably 0.1 to 200
g/10 minutes, particularly preferably 0.5 to 100 g/10 minutes,
Contains 1 to 30% by weight of the total xylene soluble content, and the molecular weight distribution of the soluble content is less than 2 to 6% by weight, preferably 5% by weight, up to 1 x 10 ⁴ as an integral value from the low molecular weight side % or less, up to 1× ^4.5 is 8% by weight or more, preferably 10% or more by weight, up to 1×10 ⁵
The content is 25% by weight or more, preferably 30% by weight or more. If the ethylene content of the copolymer as component (a) is less than 1% by weight, it is not preferable because the resulting tissue will have poor paintability and poor balance of physical properties, especially impact strength, whereas those with an ethylene content of more than 30% by weight is unfavorable because of its poor physical property balance. Furthermore, MFR is 0.1
If it is less than g/10 minutes, the moldability and appearance of the composition will be poor, and this is not preferred. Furthermore, if the room temperature xylene soluble content is less than 1% by weight, the paintability and impact strength of the tissue will be poor, and if it exceeds 30% by weight, the rigidity will decrease, and both are not preferred. On the other hand, in the molecular weight distribution value of the xylene soluble component, if the integrated value from the ^low molecular weight side is less than 2% by weight, the paintability of the composition is poor; Those containing less than 8% by weight of up to 1×10 ^4.5 and less than 25% by weight of up to 1×10 ⁵ have poor paintability and are not preferred. In addition, the molecular weight is 1×
The molecular weight distribution value in the region exceeding ¹⁰⁵ is not particularly limited, but if anything, the molecular weight is 1×
10 ⁶ and the molecular weight distribution value is preferably 80% by weight or more, particularly preferably 85% by weight or more as an integral value from the low molecular weight side. Further, the ethylene content in the xylene soluble component is not particularly limited, but if it is too much or too little, the paintability and physical properties of the composition tend to be relatively unbalanced. % by weight, preferably 25-85% by weight, particularly preferably 25-60% by weight. Here, the ethylene content of the entire copolymer can be measured using infrared spectroscopy or
This is carried out using a conventional method such as using NMR. The intrinsic viscosity (decalin 135°C) of this copolymer is 6 or less, preferably 0.5 to 4. In addition, to measure the content of xylene soluble matter at room temperature, a 2 g sample was immersed in 500 c.c. of boiling xylene for 15 minutes to dissolve it, then cooled to room temperature, filtered with a G4 type glass filter, and dried. Depends on the method of calculating the value from the determined solid phase weight. Further, the molecular weight distribution value of the component was measured by gel permeation chromatography (hereinafter abbreviated as GPC) using the above-mentioned filtrate, that is, the component as a sample. Specifically, it is determined under the following conditions. Column: Mixed polystyrene gel column inner diameter 7mmφ, length 25cm Solvent: o-dichlorobenzene Temperature: 140℃ Detector: Infrared absorption (3.42μ) Concentration: 2mg/ml Injection amount: 200μ Flow rate: 1ml/min detection line : NES SRM1475 (using standard high-density polyethylene) Calculation method: ●Molecular weight is converted to polypropylene. In this case, the universal method is used for conversion. ●The viscosity formula is based on the following formula. [η] _PP = 2.42×10 ^-4 M _PP ^0.707 [η] _PE = 3.915×10 ^-4 M _PE ^0.733 ●The weight fraction of each molecular weight range is determined by a conventional method. On the other hand, the intrinsic viscosity of the xylene soluble component at room temperature (decalin 135°C) is not particularly limited, but is usually 6 or less. In addition, regarding the isotactic index () of this propylene-ethylene copolymer,
A content of 40% by weight or more, preferably 60% by weight or more, particularly 90% by weight or more is desirable. Furthermore, a rather low homopropylene content in this EPP is preferable from the viewpoint of paintability. Specifically, it is preferably 90 to 98% by weight, more preferably 91 to 97% by weight. If the ethylene content, MFR, xylene soluble content at room temperature, and molecular weight distribution value of this copolymer are outside the above ranges, the resulting composition molded product will have poor paintability, appearance, physical property balance, and molding processability. It's inappropriate. A common stereoregular catalyst is used for producing the above-mentioned propylene/ethylene copolymer used in the present invention. Typically, a combination of a transition metal halide compound, particularly a titanium halide compound, and an organoaluminum compound is used. In this catalyst system, an electron donor such as benzoic acid ester may be added as necessary, or one activated by co-pulverization or the like may be used. In addition, by using a recently developed catalyst system consisting of a solid catalyst component in which a titanium compound is supported on a magnesium compound, an organoaluminium compound, a silicon compound, or an electron donor such as an amine, polymers can be produced in high yield. Obtainable. Generally speaking, the polymerization method is to first polymerize propylene alone or a propylene/ethylene mixture having an ethylene content of 5% by weight or less in one or multiple stages to obtain a total polymerization amount of 60 to 95% by weight, preferably 65 to 98% by weight of the total polymerization amount.
to produce an amount of polymer corresponding to . in this case,
The polymerization temperature is usually 50 to 85°C, and hydrogen is preferably used to control the molecular weight. Next, propylene/propylene having an ethylene content of preferably 25 to 85% by weight, more preferably 35 to 65% by weight is used.
An ethylene mixture is supplied to the catalyst system and polymerized in one or multiple stages to produce a propylene/ethylene copolymer. In this case, the use of hydrogen as a molecular weight regulator is optional, but the use of large amounts of hydrogen is undesirable because it reduces the rubber in the final product. On the other hand, the MFR can be adjusted by treating the material prepolymerized by the method described above with an organic peroxide such as diacyl peroxide or dialkyl peroxide. Here, this copolymer may be a mixture of two or more resins as long as the properties are within the above property range. Amount of polymer (weight)
It can also be used within a range not exceeding. This copolymer may also contain other unsaturated monomers (for example, α-olefins such as butene-1, hexane-1, octene-1, 4-ethylpentene-1, etc.) to the extent that the effects of the present invention are not significantly impaired. ; Vinyl ester such as vinyl acetate; (meth)acrylic acid (ester), unsaturated organic acid such as maleic anhydride, or its derivatives, etc.) It may be any of the following. Furthermore, a mixture of these may be used. Next, the rubber of component (b) used in the present invention is not particularly limited, but includes ethylene/propylene copolymer rubber, styrene/butadiene block copolymer rubber, hydrogenated styrene/butadiene block copolymer,
Polyisoprene rubber, isobutylene/isoprene copolymer rubber, acrylonitrile/butadiene copolymer rubber, and mixtures thereof can be used. Among these, hydrogenated products of ethylene/propylene copolymer rubber or styrene/butadiene block copolymer are particularly preferred. Here, the propylene content of the ethylene-propylene copolymer rubber is generally 10 to 60% by weight, preferably 20% by weight.
~55% by weight, Mooney viscosity ML ₁₊₄ (100℃)
is generally 5-120, preferably 7-105, MFR
(JIS-K7210, 230℃, 2.16Kg load) is generally
It is an ethylene/propylene binary copolymer or an ethylene/propylene/diene terpolymer at a rate of 0.1 to 30 g/10 min, preferably 0.2 to 20 g/10 min. In the latter case, an iodine value in the range of 5 to 30 is generally used. Propylene content is 10% by weight
If the composition is less than 60% by weight, the stiffness of the composition is poor.
Exceeding the amount is undesirable because impact strength and paintability deteriorate.
If the Mooney viscosity is less than 5, it is undesirable because the composition has poor paintability and is likely to have poor appearance (delami); if it exceeds 120, it is undesirable because moldability, appearance, and paintability are poor. Furthermore, if the MFR is less than 0.1, it tends to cause poor dispersion and has poor appearance and paintability, which is undesirable. If it exceeds 30, the paintability and appearance are also poor, which is not preferred. Furthermore, the hydrogenated product of styrene-butadiene block copolymer is a hydrogenated derivative obtained by hydrogenating a block copolymer represented by the general formula A(-B-A)n, where A is styrene or α-methyl Styrene and B is butadiene or a mixture thereof with isoprene. As for the manufacturing method of this product, for example, block copolymers are described in Japanese Patent Publication No. 40-23798, and hydrogenation treatment of block copolymers is described in Japanese Patent Publication No. 42-8704 and Japanese Patent Publication No. 43-1983.
It has been proposed in Publications No. 6636 and Special Publication No. 46-20814. One such hydrogenated block copolymer is commercially available from Shell Chemical Company under the trade name "KRATON-G." In addition, in the present invention, the rubber component (b)
When using such a hydrogenated block copolymer, it is preferable to use a so-called rubber softener such as a process oil. Next, the filler of component (c) optionally used in the present invention is an inorganic or organic filler with or without surface treatment, such as calcium carbonate (heavy, light, colloid), talc, barium sulfate, clay, carbonate. Magnesium, alumina, silica, iron oxide, calcium sulfate, glass fiber, glass beads, white carbon, hollow glass bulb, silica sand,
Silica stone, carbon black, aluminum hydroxide, magnesium hydroxide, zinc oxide, basic magnesium carbonate, asbestos, zeolite, white lead white, molybdenum, titanium oxide, diatomaceous earth, sericite, shirasu, graphite, calcium hydroxide, Calcium sulfite, gypsum fiber, carbon fiber, synthetic silicate fiber (PMF: processed mineral fiber), quartz powder, bentonite, metal whisker, wood powder, soda sulfate, various natural fibers, polyester fiber, polyamide fiber, waste paper, various These include resin fibers, etc. Among them, talc has an average particle size of 0.2 to 10 μm, preferably 0.2 to 5 μm, mica has an average particle size of 1 to 150 μm, preferably 2 to 50 μm, barium sulfate has an average particle size of 0.1 to 1 μm, preferably 0.1 to 0.5 μm, and talc has an average particle size of 0.1 to 0.5 μm. ,
Colloidal calcium carbonate, preferably 0.16 to 0.4 μm,
Calcium silicate (wollastonite) with a diameter of 1 to 15 μm, preferably 2 to 10 μm, and a diameter of 3 to 15 μm
m, preferably 6 to 14 μm glass fibers are preferred. Here, the average particle size is the particle size at the 50% point on the particle size cumulative distribution curve measured by a liquid phase sedimentation type particle size distribution measuring device using a light transmission method, such as the Shimadzu CP model (e.g. SA-CP2-20 model). This is the diameter value. Among these, for talc, a constant pressure ventilation measurement method based on the air permeation method (for example, Shimadzu SS-
100 type), and the particle size distribution measured by ^the light transmission method using the liquid phase sedimentation method described above is 95% or less of 10 μm or less, 85% or less of 5 μm or less, and 1 μm.
Talc containing 5 to 95% m or less is preferred. As for mica, white mica (muscovite) is preferable. Further, it is preferable that the glass fiber has a sizing agent attached amount of 0.3% by weight or less. Examples of surface treatments include silane coupling agents, higher fatty acids, fatty acid metal salts, unsaturated organic acids or derivatives thereof (maleic anhydride, acrylic acid, etc.), organic titanate, resin acid, etc.
Mention may be made of chemical or physical surface treatments with various treatment agents such as polyethylene glycol ether. In addition to the effects of the present invention, surface treatment is effective in improving printability, weld strength, adhesion, tapping properties, kneading properties, and the like. The ethylene polymer as component (d) optionally used in the present invention has a density of 0.910 g/cm ³ or more, and types include ethylene homopolymers (polyethylene), ethylene and other α-olefins (e.g. propylene, butene, pentene, hexene, heptene, etc.) or unsaturated organic acids and their anhydrides (e.g. acrylic acid, methacrylic acid, maleic acid, maleic anhydride, itaconic acid, etc.) or unsaturated esters (e.g. vinyl acetate, acrylic acid, etc.) methyl acid, methyl methacrylate, etc.), and copolymers of two or more elements with so-called vinyl monomers such as vinyl silane or aromatic vinyl compounds. These copolymers may be made by block, random or graft copolymerization, or may be a mixture of these polymers. However, in the case of the above-mentioned ethylene copolymer, ethylene must account for at least 50% by weight. MFR of ethylene polymer that can be used in the present invention
is 0.01-300g/10 minutes, preferably 0.1-100g/
It's 10 minutes. The blending ratio of components (a) to (d) as above is (a) + (b) +
(a) 30-99% by weight, preferably 50-98% by weight, (b) 1-40% by weight, preferably 2-35% by weight, (c) respectively based on the total amount of (c) + (d); (d) 0 to 50% by weight, preferably 15% by weight. If component (a) is less than 30% by weight, moldability and physical properties are unsatisfactory, while if it is in excess, paintability is poor and undesirable. Furthermore, if the component (b) is less than 1% by weight, the paintability will be poor, and if it exceeds 40% by weight, the rigidity will be poor, which are both undesirable. If component (c) is less than 5% by weight, the balance of physical properties will be poor, while if it exceeds 35% by weight, moldability and appearance will be poor, which is not preferred.
Furthermore, if the content of component (d) exceeds 50% by weight, the rigidity and heat resistance will deteriorate, which is not preferable. In addition to these components (a) to (d), various additional components may be added to the composition of the present invention within a range that does not significantly impair the effects of the present invention. These additional components include the propylene polymer resin as component (a) used in the present invention and thermoplastic resins other than component (d) (e.g. propylene such as polybutene, homopolymers of α-olefins other than polyethylene, propylene , olefin polymer resins such as copolymers of α-olefins other than ethylene, propylene, copolymers of α-olefins other than ethylene and vinyl monomers, and nylon polycarbonates,
Acrylonitrile butadiene styrene resin (ABS resin), polystyrene, polyvinyl chloride,
Resins other than olefin polymer resins such as polyphenylene oxide), antioxidants (phenolic agents,
sulfur thread, etc.), lubricants, various organic and inorganic pigments,
Examples include ultraviolet absorbers, antistatic agents, dispersants, copper damage inhibitors, neutralizing agents, blowing agents, plasticizers, antifoam agents, flame retardants, crosslinking agents, flowability improvers, weld strength improvers, etc. can. These additional components can also be added in combination. The resin composition of the present invention can be produced using a conventional granulator or kneader such as a single-screw extruder, a twin-screw extruder, a Banbury mixer, a roll, a Brabender plastograph, or a kneader. Normally, the compound is made into a pellet-like compound using an extruder or the like and then subjected to processing, but in special cases, the four components can be directly fed to various molding machines and molded while training with the molding machine. In addition, components (b), (c), and (d) may be mixed together with the necessary components at a high concentration in advance, either alone or as needed, to form a masterbatch, which is then separately mixed with a propylene-ethylene copolymer, etc. It is also possible to perform blend compounding or molding while diluting. The method of molding the composition of the present invention is not particularly limited, and includes extrusion molding, blow molding, injection molding,
The effects of the present invention are exhibited in molded products regardless of the molding method used, such as sheet molding, thermoforming, rotational molding, and laminated molding, but injection molding is the most suitable among them. [Actions and Effects] The composition of the present invention thus obtained has excellent paintability (1,
In addition to having so-called solvent treatment resistance, such as little loss of gloss due to steam cleaning with 1,1-trichloroethane, etc., it also has a high balance of physical properties (rigidity, low-temperature impact resistance), good appearance, and molding process. In addition, sink marks and warpage are less noticeable, and dimensional stability, printability, adhesion, and scratch resistance are also good, weld lines are less noticeable, and weld strength and tensile elongation are also good. As a result, the resin composition of the present invention can be used in application fields that require high coating performance, such as automobile parts and other applications.
Industrial parts field such as OA equipment parts, especially bumpers,
For large automobile parts such as fenders, facias, door plates, side mat guards, kicking plates, spoilers, instrument panels, and trims, housings for so-called OA equipment such as computers, personal computers, VTRs, televisions, and home appliances. This enables application under high quality conditions. As a result, it has become possible to obtain coated molded bodies of high quality. [Example] The present invention will be specifically explained with reference to Examples below. The various measurement methods used here are as follows. (1) Paintability (a) Painting method: A polypropylene paint [Planet PP-3 manufactured by Origin Electric Co., Ltd.] was spray-coated to a film thickness of approximately 7 μm on the test piece.
Bake for 20 minutes at ℃. (b) Initial adhesion of paint film: 2mm of the paint test piece prepared in (a) was left at room temperature day and night, and then cut into the paint film with a cutter.
Place a total of 100 mm square squares (10 x 10 squares), stick 24 mm wide cellophane tape (manufactured by Nichiban Co., Ltd.) on top of it, and peel it off suddenly in the direction perpendicular to the painted surface, and it will not peel off. I counted the number of squares. (c) Paint film moisture resistance test: The painted test piece prepared in (a) was left at room temperature for two days and nights, and then hung in a constant temperature and humidity chamber maintained at 50°C and 95% RH for 240 hours. Two hours after taking it out from the tank, the same substrate eye test as in (b) was conducted. (d) Paint film hot water resistance test: After leaving the painted test piece prepared in (a) at room temperature for 2 days and nights, it was placed in a constant temperature water bath at 40°C for 300 min.
Soaked for an hour. Two hours after removal, the same substrate test as in (b) was conducted. (2) Flexural modulus: JIS-K7203 compliant (23℃) (3) Dart impact strength: A dart, which is a load sensor, was placed on a test piece (100 x 100 x 2 mm each) installed on a support (hole diameter φ40 mm). Drop (2m x 5kg)
f) The deformation and fracture behavior of the test piece under impact load was measured, and the impact energy absorbed up to the point of crack initiation in the resulting impact pattern was calculated and taken as the impact strength of the material. The measurement atmosphere temperature was 23°C. (4) Molding processability and appearance: 5 parts by weight of brown pigmented polypropylene masterbatch was dry blended and a model sample (1200 ×350×310×3 each
mm), and observe the fluidity, mold releasability, sink marks, warping, flow marks, silver streaks, uneven coloring, etc., and if these are at a level that does not cause any problems in practical use, it is considered to be good. Items with a level that could not be used were judged to be defective. (5) GPC analysis: Equipment: Waters ALC/GPC150C. Column: Showa Denko AD80M/S, 3 columns. In the Examples and Comparative Examples below, the following EPP was used as component (a). EPP-A After a stirred polymerization tank with an internal volume of 200 ml was sufficiently replaced with propylene, 70 ml of n-heptane was charged.
After raising the temperature to 60°C, 12 g of titanium trichloride (TPB01, manufactured by Marubeni Solvay) and 50 g of diethylaluminum chloride were charged. Next, the temperature inside the polymerization tank was raised to 70°C, and propylene was charged at 10 kg/hr for 210 minutes. The hydrogen concentration was controlled at 6%. The reaction was carried out intermittently at the same temperature until the pressure inside the reaction tank reached 2Kg/cm ² G, then the gas in the gas phase was purged and the pressure was lowered.
It was set to 0.5Kg/cm ² G. Subsequently, a mixed gas of propylene/ethylene was charged at a rate of 3 kg/hr of propylene and 2 kg/hr of ethylene for 30 minutes. During this time, the temperature of the reaction tank was controlled at 65°C. The polymer slurry obtained in this way was
The mixture was transferred to a stirring tank, 40 g of n-heptane and 5 g of butanol were added, and the mixture was stirred at 70° C. for 2 hours. Next, 60 g of pure water was added, and after stirring at 70°C for 30 minutes, the lower layer of water was removed. The upper layer slurry was centrifuged to separate the polymer and dried with a dryer to obtain a polymer powder (EPP-A). The properties of the obtained polymer are shown in Table 1. In addition, in the polymerization of other EPPs described below, each polymer is
The hydrogen concentration was set so that the MFR would be the value shown in Table 1. EPP-B Polymerization was carried out in the same manner as in the polymerization of EPP-A except that the first stage propylene charging time was changed to 225 minutes to obtain a polymer powder (EPP-B). EPP-C The polymerization of EPP-A was carried out in the same manner except that the charging rate of the mixed gas in the second stage was 0.5 Kg/hr for propylene and 4.5 Kg/hr for ethylene.
A polymer powder (EPP-C) was obtained. EPP-D In the polymerization of EPP-A, the first stage polymerization temperature was 65°C, the charging time of propylene was 220 minutes, and the charging time of the mixed gas in the second stage was 65°C.
1.5Kg/hr, ethylene 3.5Kg/hr, and charged for 65 minutes
-D) was obtained. EPP-E In the polymerization of EPP-A, the pressure after purging in the first stage was 1.0 Kg/cm ² G, and the charging rate of the mixed gas in the second stage was 1.5 Kg/hr for propylene and 4 Kg/hr for ethylene. A polymer powder (EPP-E) was obtained by carrying out the same procedure except for the following steps. The properties of these polymers are shown in Table 1.

[Table] Other components (b), (c), and (d) used in the formulation of the composition are as follows. (b) Rubber component EPM: propylene-ethylene copolymer rubber with propylene content = 25% by weight, Mooney viscosity = ML ₁₊₄ (100°C) 70, MFR = 0.8 g/10 min. SEBS: Hydrogenated styrene-butadiene block copolymer with Bruckfield viscosity = 500 cps (20% by weight toluene solution, 77%) (manufactured by Schiel Chemical Co., Kraton G1652). However, process oil (Idemitsu Kosan PW-90) is used as a rubber softener.
10 parts by weight of were added to 100 parts by weight of SEBS. (c) Filler talc: average particle size 1.9 μm, 97% by weight of 10 μm or less,
91% by weight of 5μm or less, 17% by weight of 1μm or less. Colloidal calcium carbonate: average particle size 0.3 μm. (d) Ethylene polymer Polyethylene (PE) with density = 0.950 g/cm ² , MFR = 5 g/10 min. Examples 1-3 and Comparative Examples 1-9

[Table] With the formulation shown in Table 2, using a twin-screw kneader, 210
The mixture was kneaded and granulated at ℃ to obtain pellets of the composition. This pellet is processed using a screw in-line injection molding machine.
Test pieces were molded at 230°C, and their paintability and physical property balance were measured. Moreover, with the pellets,
The moldability and appearance were evaluated. As shown in Table 2, all of the compositions of Examples 1 to 3 had good coating properties, physical property balance, moldability, and appearance, as well as good printability, plating properties, weld strength, etc. Ta. On the other hand, the compositions of Comparative Examples 1 to 6 all had poor paintability, and the compositions of Comparative Examples 7 to 9 all had a poor balance of physical properties compared to the compositions of Examples. .

Claims (1)

[Claims] 1 Consisting of each of the following components (a) to (d), (a), (b),
The proportions of each component (c) and (d) are 30 to 99% by weight, 1 to 40% by weight, and 5 to 5% by weight for (a) + (b) + (c) + (d), respectively.
A propylene polymer resin composition characterized in that the content is 35% by weight and 0 to 50% by weight. (a) Ethylene content 1-30% by weight, MFR 0.1
g/10min or more, the xylene soluble content at room temperature is 1 to 30% by weight, and the molecular weight distribution of the soluble content is less than 2 to 6% by weight, with a molecular weight of 1 x 10 ⁴ as an integral value from the low molecular side. Propylene-ethylene copolymer containing 8% by weight or more of up to ×10 ^4.5 and 25% by weight or more of up to 1 × 10 ⁵ (b) Rubber component (c) Filler (d) Ethylene polymer