JP2003055515A - Resin composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a resin composition having high planar impact resistance and including an aromatic vinyl-based polymer and/or a polymer prepared by modifying the aromatic vinyl-based polymer with a conjugated diene rubber and an aromatic vinyl-unsaturated nitrile copolymer-based polymer. SOLUTION: This resin composition is obtained by incorporating a composition comprising the aromatic vinyl-based polymer and/or the polymer made by modifying the aromatic vinyl-based polymer with the conjugated diene rubber and the aromatic vinyl-unsaturated nitrile copolymer-based polymer with a polyphenylene ether-based resin, a methyl methacrylate-based polymer and an aromatic vinyl-based elastomer.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to an improved aromatic vinyl polymer and / or a polymer obtained by modifying an aromatic vinyl polymer with a conjugated diene rubber and an aromatic vinyl-unsaturated nitrile copolymer polymer. The present invention relates to a composition.

[0002]

2. Description of the Related Art For aromatic vinyl polymers such as MBS
Addition of a polymer obtained by modifying a copolymer of styrene and methacrylic acid ester with a conjugated diene rubber such as a resin, and addition of an aromatic vinyl-unsaturated nitrile polymer to an aromatic vinyl such as MBS resin. The study aimed at improving impact resistance by adding a polymer obtained by modifying a copolymer with a methacrylic acid ester with a conjugated diene rubber has been widely conducted conventionally. However, a resin composition composed of an aromatic vinyl polymer and an aromatic vinyl-unsaturated nitrile polymer causes peeling due to poor compatibility, and has desirable mechanical properties when simply mixed. No composition is obtained. Japanese Patent Publication No. 6-35524 discloses an invention which improves the physical property balance by blending a specific polyacrylic resin in a resin composition composed of polystyrene and an ABS resin. However, in consideration of the situation of actual use, further improvement of physical properties is required, and in particular, improvement of surface impact resistance is required.

[0003]

In view of the above situation, the present invention provides a resin composition which does not have the above-mentioned problems, suppresses peeling of a molded article, and has good surface impact resistance. That is the purpose.

[0004]

Means for Solving the Problems The inventors of the present invention have made extensive studies in order to solve the above problems, and as a result, have found that an aromatic vinyl polymer and / or a polymer obtained by modifying an aromatic vinyl polymer with a conjugated diene rubber and an aromatic compound. By adding a polyphenylene ether-based resin, a methyl methacrylate-based polymer and an aromatic vinyl-based elastomer to a composition composed of an aromatic vinyl-unsaturated nitrile copolymer-based polymer, peeling of a molded article is suppressed, and the surface resistance is improved. The present invention has been completed by finding that a composition excellent in impact resistance can be obtained.

That is, the present invention provides (A1) an aromatic vinyl polymer and / or a polymer obtained by modifying an aromatic vinyl polymer with a conjugated diene rubber, 5 to 95% by weight and (A2).
100 parts by weight of mixed resin (A) composed of a copolymer obtained by modifying a copolymer of aromatic vinyl and unsaturated nitrile with a conjugated diene rubber and / or a copolymer of aromatic vinyl and unsaturated nitrile and 5 to 95% by weight. On the other hand, a mixed resin (B) consisting of 1 to 98% by weight of (B1) polyphenylene ether, 1 to 98% by weight of (B2) methyl methacrylate polymer, and 1 to 98% by weight of (B3) aromatic vinyl elastomer. It is a resin composition obtained by adding 1 to 40 parts by weight.

The present invention will be described in more detail below. The aromatic vinyl polymer used in the present invention is a homopolymer or copolymer obtained by homopolymerizing or copolymerizing a monomer component containing aromatic vinyl as a main component.
Specific examples of the aromatic vinyl monomer in the present invention include styrene, α-methylstyrene, o-methylstyrene, m-methylstyrene, p-methylstyrene, t-butylstyrene, α-methylvinyltoluene and dimethyl. Examples thereof include styrene, chlorostyrene, dichlorostyrene, bromostyrene, dibromostyrene, α- or β-vinylnaphthalene and the like. Styrene, α-methylstyrene and p-methylstyrene are preferred, and styrene is more preferred. These aromatic vinyl monomers may be used alone or in combination.

Specific examples of other copolymerizable monomers include methyl acrylate, ethyl acrylate, propyl acrylate, butyl acrylate, 2-ethylhexyl acrylate, hydroxyethyl acrylate, glycidyl acrylate, and acrylic. Cyclohexyl acid, phenyl acrylate, benzyl acrylate, 2-ethylhexyl methacrylate, hydroxyethyl methacrylate, glycidyl methacrylate, cyclohexyl methacrylate, methyl methacrylate, butyl methacrylate, butyl cyclohexyl methacrylate, phenyl methacrylate, benzyl methacrylate , Acrylic acid, methacrylic acid, maleic anhydride, maleimide, N-methylmaleimide, N-cyclohexylmaleimide, N-phenylmaleimide and the like. These monomers may be used alone or in a mixture.

As a method for producing such an aromatic vinyl polymer, a known polymerization method can be used. Examples include methods such as bulk polymerization, suspension polymerization, bulk-suspension polymerization, solution polymerization or emulsion polymerization. At this time, a polymerization solvent such as ethylbenzene, toluene or xylene can be used. Further, the organic peroxide can be added during the polymerization. Further, either a batch polymerization method or a continuous polymerization method can be used.

Examples of such a polymer include polystyrene (PS) which is a homopolymer of styrene, methyl methacrylate-styrene copolymer (MS), methyl methacrylate-butadiene-styrene copolymer (MBS). ),
Styrene-maleic anhydride copolymer (SMA), styrene-methacrylic acid copolymer (SMAA), and further heat-resistant styrene obtained by copolymerizing styrene-butyl methacrylate copolymer, α-methylstyrene or maleimide Resin etc. can be mentioned.

The polymer obtained by modifying an aromatic vinyl polymer with a conjugated diene rubber in the present invention means a polymer in which a conjugated diene rubber polymer is dispersed in a particle shape in a matrix composed of an aromatic vinyl polymer. It can be obtained by subjecting a monomer mixture to known bulk polymerization, bulk suspension polymerization, solution polymerization, or emulsion polymerization in the presence of a conjugated diene rubber polymer. The conjugated diene rubber in the present invention means a conjugated diene alone or one obtained by polymerizing one or more kinds of monomers copolymerizable with the conjugated diene by a conventionally known method.

Specific examples of these conjugated dienes include butadiene, isoprene and chloroprene. Other monomers may be used as long as they have a conjugated diene structure. The conjugated diene rubber in the present invention may have any molecular weight as long as it is obtained by polymerizing a conjugated diene monomer. Preferably 100
It is 00 or more and 2,000,000 or less. Molecular weight is 1000
If it is less than 0, the impact resistance of the (co) polymer modified with the conjugated diene rubber is not improved, which is not preferable, and 20,000
If it exceeds 00, the impact resistance of the (co) polymer modified with the conjugated diene rubber is not improved, which is not preferable. A more preferable range of the molecular weight is 20,000 or more and 500,000 or less. The molecular weight can be measured by a conventionally known evaluation method.
Specific examples thereof include gel permeation chromatography (GPC) method, light scattering method, osmotic pressure method, solution viscosity method and the like. Of course, any other method may be used.

Specific examples of these conjugated diene rubbers include:
Diene rubber such as polybutadiene, poly (styrene-butadiene), poly (acrylonitrile-butadiene),
Examples thereof include isoprene rubber, chloroprene rubber, ethylene-propylene-diene monomer terpolymer (EPDM) and the like. The conjugated diene rubber in the present invention is
Depending on the application, the double bond in the diene copolymer may be hydrogenated. In addition, the proportion of hydrogenated double bonds in the diene copolymer does not matter.

As the method of hydrogenation, there are known methods such as those described in JP-B-42-8704 and JP-B-1-37970. The polymer obtained by modifying an aromatic vinyl polymer with a conjugated diene rubber in the present invention means a polymer in which a conjugated diene rubber polymer is dispersed in a matrix in a matrix composed of an aromatic vinyl polymer, and the conjugated diene rubber is used. It can be obtained by subjecting the monomer mixture to known bulk polymerization, bulk suspension polymerization, solution polymerization or emulsion polymerization in the presence of a polymer, in which case a polymerization solvent such as ethylbenzene, toluene or xylene is used. You can also Further, the organic peroxide can be added during the polymerization. Further, either a batch polymerization method or a continuous polymerization method can be used.

Examples of such polymers include high impact polystyrene and the like. A polymer obtained by modifying a copolymer of an aromatic vinyl and an unsaturated nitrile with a conjugated diene rubber in the present invention means that the conjugated diene rubber polymer is particulate in a matrix composed of the copolymer of an aromatic vinyl and an unsaturated nitrile. It is obtained by subjecting a monomer mixture to known bulk polymerization, bulk suspension polymerization, solution polymerization, or emulsion polymerization in the presence of a conjugated diene rubber polymer.

In this case, even if the polymerization is carried out in the presence of the conjugated diene rubber polymer under the condition that two or more types of monomers are present at the same time, one or more types of monomer are present in the presence of the conjugated diene rubber polymer. It does not matter even if the polymerization is carried out under the condition that one or more monomers are further added in accordance with the progress of the polymerization where the monomer exists. At this time, a polymerization solvent such as ethylbenzene, toluene or xylene can be used. Further, the organic peroxide can be added during the polymerization. Further, either a batch polymerization method or a continuous polymerization method can be used.

Specific examples of the aromatic vinyl in the present invention include those mentioned above, and examples of the unsaturated nitrile include acrylonitrile, methacrylonyl, fumaronitrile and the like, among which acrylonitrile is preferable.
Examples of such polymers include acrylonitrile-styrene copolymer (AS resin) and acrylonitrile-butadiene-styrene copolymer (ABS resin), as well as acrylonitrile-acrylic rubber-styrene copolymer (AA).
S resin), acrylonitrile-chlorinated polyethylene-styrene copolymer (ACS resin), acrylonitrile-ethylene / propylene rubber-styrene copolymer (AES resin), acrylonitrile-styrene-ethylene / vinyl acetate copolymer, styrene-acrylonitrile -Butyl acrylate copolymer (BAAS resin), heat-resistant ABS resin obtained by copolymerizing α-methylstyrene or maleimide, α-methyl in which the styrene portion of styrene-acrylonitrile copolymer resin is replaced with α-methylstyrene Examples thereof include styrene-acrylonitrile-based copolymer resins.

The polyphenylene ether of the present invention is
(Hereinafter, simply abbreviated as PPE) is a bond unit:

[0018]

[Chemical 1]

(Here, each of R1, R2, R3 and R4 is selected from the group consisting of hydrogen, halogen, hydrocarbon or substituted hydrocarbon group and may be the same or different from each other.) And reduced viscosity (0.5
g / dl, chloroform solution, measured at 30 ° C.)
15-0.70, more preferably 0.2-0.
Homopolymers and / or copolymers in the range of 66. As a concrete example of this PPE, poly (2,6)
-Dimethyl-1,4-phenylene ether), 2,6-
A copolymer of dimethylphenol and 2,3,6-trimethylphenol is preferable, and among them, poly (2,6-
Dimethyl-1,4-phenylene ether) is preferred.

The method for producing such PPE is not particularly limited as long as it can be obtained by a known method. For example, Ha described in US Pat. No. 3,306,874 is disclosed.
It can be easily produced by oxidatively polymerizing 2,6-xylenol, for example, using a complex of a cuprous salt of y and an amine as a catalyst.
It can be easily produced by the method described in JP-A-306875, US Pat. No. 3,257,357, US Pat. No. 3,257,358, JP-B-52-17880, JP-B-50-51197 and the like.

The PPE used in the present invention is, in addition to the above-mentioned PPE, the PPE and the α, β-unsaturated carboxylic acid or its derivative in a molten state in the presence or absence of a radical generator and in a dissolved state. 80 to 350 in the state and slurry state
Modified (0.01-10 wt% grafted or added) PPE obtained by reacting at a temperature of ℃
The above PPE and the modified PPE
The mixture may be in any proportion. Also, P
As the PE, phosphorus compound-treated PPE obtained by adding 9,5 parts by weight of 9,10-dihydro-9-oxa-10-phosphaphenanthrene to 100 parts by weight of PPE and melt-kneading it can also be provided.

The PPE used in the present invention is the above-mentioned PPE.
In addition to PE, polystyrene or impact-resistant polystyrene added to these PPE in an amount not exceeding 90% by weight can also be suitably used. The methyl methacrylate polymer in the present invention is a homopolymer or copolymer obtained by homopolymerizing or copolymerizing a monomer component containing methyl methacrylate as a main component.

The monomer component used in the present invention comprises a methyl methacrylate monomer and other copolymerizable monomers. Other copolymerizable monomers include, for example, α, β-unsaturated carboxylic acid alkyl ester,
If necessary, α, β-unsaturated carboxylic acid, aromatic vinyl, vinyl cyanide, N-substituted maleimides, maleic anhydride and the like can also be used. Further, the conjugated diene rubber described above may be contained.

Of these, α, β-unsaturated carboxylic acid alkyl esters are preferred. These may be mixed and used. Examples of the α, β-unsaturated carboxylic acid alkyl ester include methyl acrylate, ethyl acrylate, propyl acrylate, butyl acrylate, 2-ethylhexyl acrylate, hydroxyethyl acrylate, glycidyl acrylate, cyclohexyl acrylate, and acrylic. Phenyl acid, benzyl acrylate, 2-ethylhexyl methacrylate, hydroxyethyl methacrylate, glycidyl methacrylate, cyclohexyl methacrylate, butyl cyclohexyl methacrylate, phenyl methacrylate, benzyl methacrylate and the like can be mentioned.

Of these, methyl acrylate, ethyl acrylate, propyl acrylate, butyl acrylate, 2-ethylhexyl acrylate and butylcyclohexyl methacrylate are preferred. Examples of the α, β-unsaturated carboxylic acid include acrylic acid and methacrylic acid. Examples of the aromatic vinyl include styrene, α-methylstyrene, halogenated styrene, alkylated styrene, vinylnaphthalene and the like. Examples of vinyl cyanide include acrylonitrile and methacrylonitrile. Examples of the N-substituted maleimides include maleimide, N-methylmaleimide, N-cyclohexylmaleimide and N-phenylmaleimide.

As a method for producing such a methyl methacrylate polymer, a known polymerization method can be used. For example bulk polymerization,
Methods such as suspension polymerization, bulk-suspension polymerization, solution polymerization or emulsion polymerization are mentioned. Examples of such a polymer include PMMA resin and the like. The aromatic vinyl elastomer in the present invention means an aromatic vinyl monomer such as styrene, α-methylstyrene, vinyltoluene and olefins such as ethylene, propylene, butene-1, isobutylene or butadiene, isoprene, 1,3. -Copolymers with conjugated dienes such as pentadiene, 1,4-hexadiene, and non-conjugated dienes such as norbornene derivatives, the shapes of which are block copolymers (including tapered block copolymers), random copolymers, Either a graft copolymer or a radial copolymer may be used. More preferred are block copolymers.

These copolymer components may be used alone or in combination of two or more. The method of polymerizing these monomers is not particularly limited, but for example, solution polymerization with n-BuLi, a method of previously polymerizing a styrene portion and another monomer portion with a single site catalyst, and then coupling are used. Among these block copolymers, more preferred aromatic vinyl elastomers are:
A styrene-butadiene copolymer, a styrene-isoprene copolymer, a styrene-butadiene-isoprene copolymer, and hydrogenated products of these copolymers.

As the method for hydrogenation, known methods such as those described in JP-B-42-8704 and JP-B-1-37970 can be mentioned. The content of the aromatic vinyl component in these aromatic vinyl elastomers is 5 to 7
It is 5% by weight, more preferably 10 to 70% by weight, still more preferably 20 to 60% by weight. These aromatic vinyl elastomers may be modified and used as needed. Specific examples of the modifier include unsaturated carboxylic acid anhydrides (maleic anhydride, itaconic anhydride, etc.), unsaturated carboxylic acids (acrylic acid, methacrylic acid,
Maleic acid, itaconic acid, etc.), unsaturated carboxylic acid esters (methyl methacrylate, ethyl methacrylate, butyl methacrylate, etc.), unsaturated carboxylic acid imides (N-phenylmaleimide, etc.), epoxy compounds, isocyanate compounds, cyanoethyl compounds, Examples thereof include chlorine compounds, alkyl chloride compounds, formal compounds and alkyl ketene dimer compounds.

The reaction method of the modifier and the aromatic vinyl-based elastomer is not particularly limited. For example, the modifier and the aromatic vinyl-based elastomer are melt-kneaded by an extruder or the like in the presence or absence of radicals. A method or a method of dissolving an aromatic vinyl-based elastomer in a solvent and reacting it can be used. In the present invention, (A)
(A1) Aromatic vinyl polymer and / or polymer obtained by modifying aromatic vinyl polymer with conjugated diene rubber, (A2) Copolymer obtained by modifying copolymer with aromatic vinyl and unsaturated nitrile with conjugated diene rubber And / or a copolymer of aromatic vinyl and unsaturated nitrile (A1), (A
The proportions of 2) are both in the range of 5 to 95% by weight. This ratio is determined according to the required mechanical strength, rigidity, and moldability. Both (A1) and (A2) are preferably 10
It is in the range of 90% by weight.

In the present invention, the proportions of (B1), (B2) and (B3) represented by (B) (B1) polyphenylene ether, (B2) methyl methacrylate polymer and (B3) aromatic vinyl elastomer. Are both in the range of 1 to 98% by weight. This compounding amount is determined according to the required mechanical strength, rigidity, and moldability. Preferably, all of (B1), (B2) and (B3) are in the range of 5 to 90% by weight, and more preferably (B1), (B2),
Both (B3) are in the range of 10 to 80% by weight.

In the present invention, (A1) an aromatic vinyl polymer and / or a polymer obtained by modifying an aromatic vinyl polymer with a conjugated diene rubber, and (A2) a copolymer of aromatic vinyl and an unsaturated nitrile is conjugated. (B1) polyphenylene ether, based on 100 parts by weight of a mixed resin (A) composed of (A1) and (A2) represented by a copolymer modified with a diene rubber and / or a copolymer of aromatic vinyl and unsaturated nitrile, (B2) Methyl methacrylate-based polymer, (B
3) An aromatic vinyl elastomer (B1),
The blending amount of the mixed resin (B) composed of (B2) and (B3) is in the range of 1 to 40 parts by weight. The blending amount of the mixed resin (B) is determined according to the required mechanical strength, rigidity and moldability. The mixed resin (B) is preferably 2-35 parts by weight, more preferably 5-30 parts by weight, with respect to 100 parts by weight of the mixed resin (A).

The resin composition of the present invention contains glass fibers, glass flakes, glass beads, carbon fibers, metal whiskers, metal fibers, calcium carbonate, magnesium carbonate, silica, calcium silicate, carbon black as long as the characteristics are not impaired. , Titanium oxide, mica, talc,
Kaolinite, montmorillonite, dawsonite, graphite, beryllium oxide, zinc oxide, magnesium hydroxide, inorganic filler such as aluminum hydroxide, acrylic fiber, polyamide fiber, cellulose fiber, aramid fiber,
Polyarylate fiber, various wood powder, walnut shell, rice husk, peach kernel,
Organic fillers such as apricot kernel, corn core, jute, kenaf, hemp, antistatic agent, heat stabilizer, antioxidant, ultraviolet absorber, light stabilizer, nucleating agent, plasticizer, lubricant, flame retardant, difficult Various additives such as a combustion aid, a pigment, a colorant, an antibacterial agent, a foaming agent, a silicone oil and an antiblocking agent can be appropriately added and used.

The resin composition according to the present invention can be produced using any melt kneader used for producing ordinary resins and the like. Specifically, there are batch type kneaders such as mixing rolls, Banbury mixers and pressure kneaders, and continuous type kneaders such as single screw extruders and twin screw extruders. Furthermore, a mixing and melting machine such as a K mixing machine by a high-speed rotary impact friction method can also be used. The kneading order is not limited, and, for example, the components (A) and (B) may be kneaded together, or the component (B) may be kneaded in advance and the obtained product may be mixed with the component (A). You may knead. Further, there is no limitation on the kneading order when various fillers and additives are added.

The resin composition of the present invention can be molded by various known methods generally used for molding thermoplastic resins, such as injection molding, extrusion molding, blow molding, inflation molding, vacuum molding and press molding. Molded into the body. Further, after being formed into a film, a biaxially stretched film, a sheet, a foamed sheet, foamed beads or the like, it can be further formed into a desired formed body. Further, without using a melt-kneading machine, it is possible to obtain a molded product immediately after melt-kneading the components (A) and (B) together in the molding machine. In this case, the component (B) may be melt-kneaded in advance.

The resin composition of the present invention is used, for example, for television parts, telephone parts, OA equipment parts, vacuum cleaner parts, fan parts, air conditioner parts, refrigerator parts, washing machine parts, Used for a wide range of applications such as humidifier parts, tableware dryer parts, and other OA equipment and home appliances, sanitary products such as toilet seats and washbasin parts, and other building materials, vehicle parts, daily necessities, toys, miscellaneous goods, etc. can do. In addition, the resin composition of the present invention can be applied as a material recycle of the resin used in home appliances, office automation equipment, automobiles, etc., which is no longer needed after being used. In this case, other resin components that are mixed and difficult to remove during the recovery of the components (A1) and (A2) and various fillers and additives that have been added in advance to the components (A1) and (A2) are excluded. The present invention can be applied as long as impurities such as a coating film, a plating film, dust, sand, and wiring waste are mixed within 5% by weight.

[0036]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be specifically described below. However, the present invention is not limited to these examples. The materials used in Examples and Comparative Examples in the present invention are as shown below. (1) A polymer obtained by modifying an aromatic vinyl polymer with a conjugated diene rubber Polystyrene 403R (MFR = 3.2 g / 10 min) manufactured by A & M Styrene Co., Ltd. is used. In addition, it is described as HIPS in Table 1 of Examples and Comparative Examples of the present invention.

(2) A polymer obtained by modifying a copolymer of aromatic vinyl and unsaturated nitrile with a conjugated diene rubber Styrac ABS220 (MFR = Made by Asahi Kasei Corporation)
11 g / 10 min) is used. In addition, it is described as ABS in Table 1 of the examples and comparative examples of the present invention. (3) 40 parts by weight of poly (2,6-dimethyl-1,4phenylene) ether (PPE) having a polyphenylene ether intrinsic viscosity of 0.54 (in chloroform at 30 ° C.), polystyrene (and
M Styrene Co., Ltd. polystyrene 403R) 60
Pellets obtained by compounding parts by weight and extrusion-kneading at 280 ° C. using a twin-screw extruder are used. In addition, it is described as m-PPE in Table 1 of Examples and Comparative Examples of the present invention.

(4) Methyl methacrylate polymer Delpet 60N manufactured by Asahi Kasei Corporation is used. In addition,
It is described as PMMA in Table 1 of Examples and Comparative Examples of the present invention. (5) Aromatic vinyl-based elastomer Toughprene A (styrene-butadiene block copolymer, styrene content 40% by weight) manufactured by Asahi Kasei Corporation is used. In addition, it is described as TR in Table 1 of the examples and comparative examples of the present invention.

The method of evaluating the surface impact resistance used in the examples and comparative examples of the present invention is as follows. Drop weight impact absorption energy measurement Test piece shape: 75 mm long, 75 mm wide, 3 mm thick flat plate measuring device: Graphic Impact Tester (manufactured by Toyo Seiki Co., Ltd.) Test piece holder diameter: 50 mm Striker diameter: 13 mm Striker tip shape: Hemispherical weight Weight: 6.5 kg Drop height: 100 cm

A predetermined weight is freely dropped from a predetermined height on the test piece fixedly supported by the test piece holder under the above measurement conditions, and the test piece is completely broken or penetrated by a striker provided below the weight. The load behavior at this time is detected by the load cell integrated with the striker, and the deformation process of the test piece is detected by the optical displacement meter to calculate the energy required for the destruction of the test piece, To do. The higher the impact energy absorption value of the falling weight, the better the surface impact resistance.

[0041]

Example 1 and Comparative Examples 1 to 5 Resin compositions were prepared by mixing the resins in the formulations shown in Table 1 of Examples and Comparative Examples of the present invention and melt-kneading at 240 ° C. using a twin-screw extruder. Got Using the injection molding machine, the obtained composition was molded at a molding temperature of 240 ° C. and a mold temperature of 60 ° C. to prepare a test piece for surface impact resistance evaluation, and evaluated. The results are shown in Table 1.

[0042]

[Table 1]

[0043]

EFFECT OF THE INVENTION Peeling can be achieved by adding a polyphenylene ether, a methyl methacrylate-based polymer and an aromatic vinyl-based elastomer to a mixture of an aromatic vinyl-based polymer and an aromatic vinyl-unsaturated nitrile copolymer-based polymer. It was possible to obtain a composition that was suppressed and was excellent in surface impact resistance.

   ─────────────────────────────────────────────────── ─── Continued front page    F term (reference) 4J002 BC02W BC03Y BC06X BC07W                       BC08W BC11W BG05Z BG06Z                       BH01W BN10X BN12X BN13W                       BN14X BN15X BN16W BN17X                       BP00U BP01U BP03U CH07Y                       FD010 FD030 FD060 FD070                       FD100 GC00 GL00 GM00                       GN00 GQ00

Claims (2)

[Claims] 1. (A1) 5 to 95% by weight of an aromatic vinyl polymer and / or a polymer obtained by modifying an aromatic vinyl polymer with a conjugated diene rubber, and (A2) a copolymerization weight of aromatic vinyl and an unsaturated nitrile. (B1) polyphenylene ether 1 to 100 parts by weight of a mixed resin (A) composed of a copolymer obtained by modifying the polymer with a conjugated diene rubber and / or a copolymer of aromatic vinyl and unsaturated nitrile.
98% by weight, (B2) methyl methacrylate polymer 1
-98 wt% and (B3) aromatic vinyl elastomer 1-98 wt% mixed resin (B) 1-40 parts by weight of a resin composition. 2. The resin composition according to claim 1, wherein the aromatic vinyl-based elastomer (B3) is a block copolymer.