JPH01282257A - Polyphenylene ether resin composition - Google Patents

Abstract

PURPOSE:To obtain a composition excellent in moldability and fluidity and capable of providing moldings excellent in impact and heat resistance, mechanical strength and surface appearance by mixing a polyphenylene ether resin with an alkenyl aromatic resin and a specified composite rubber. CONSTITUTION:(A) A polyphenylene ether resin is blended with (B) an alkenyl aromatic resin and (C) a composite rubber with 0.08-0.6mum average particle diameter and >=80wt.% gel content consisting of 10-90wt.% polyorganosiloxane rubber component produced by using (C1) an organosiloxane (pref. dimethyl siloxane), a crosslinking agent and, as necessary, a graft-crosslinking agent, carrying put emulsion polymerization of the mixture, impregnating the resultant polyorganosiloxane rubber component with (C2) an alkyl (meth)acrylate (pref. n-butyl acrylate) and a crosslinking agent and then carrying out polymerization thereof and 10-90wt.% polyalkyl (meth)acrylate rubber component, thus obtaining the subject resin composition.

Description

Detailed Description of the Invention [Industrial Field of Application] The present invention provides a polyphenylene product that provides molded products with excellent impact resistance, heat resistance, mechanical strength, and surface appearance, and has excellent moldability, fluidity, etc. This invention relates to an ether resin composition.

[Summary of the invention]

The present invention provides a polyphenylene ether resin composition in which the polyphenylene ether resin composition comprises a composite rubber composed of a polyphenylene ether resin, an alkenyl aromatic resin, a polyorganosiloxane rubber component, and a polyalkyl (meth)acrylate rubber component. By containing 5 as a constituent component, delamination does not occur (it provides a molded product with significantly improved impact resistance, heat resistance, mechanical strength, surface appearance, etc., and improves moldability and fluidity. This makes it possible to provide a resin composition with excellent properties.

[Prior art and problems to be solved by the invention] Polyphenylene ether resins are increasingly being used as engineering plastics because they provide molded products with excellent heat resistance and rigidity, but the surface appearance and impact resistance of the molded products are Its use is limited due to its inferiority.

As a method of improving the impact resistance of polyphenylene ether resin molded products, a method of blending a polybutadiene elastomer is disclosed in Japanese Patent Publication No. 47-32731 and Japanese Patent Application Laid-Open No. 1973-1989.
This is disclosed in Japanese Patent No.-2345 and the like. however,
When such a method is used, unsaturated bonds remain in the polybutadiene elastomer, making it thermally unstable, making it impossible to obtain a material with excellent thermal stability that is useful for practical purposes.

In addition, US Pat. No. 3,361,85 discloses a method of improving the moldability of polyphenylene ether resin and the impact resistance of molded products by blending polyolefin such as ethylene-propylene copolymer with polyphenylene ether resin.
It is disclosed in the specification of No. 1, Japanese Patent Publication No. 42-7069, etc. However, when using this method, if the amount of polyolefin is 10% by weight or more, the compatibility between the polyphenylene ether resin and the polyolefin is poor, and when molded products are formed, delamination occurs and the surface appearance is poor (, Moreover, the degree of improvement in impact resistance is not so remarkable.

Therefore, JP-A-55-75444 discloses a method of improving impact resistance by blending polyorganosiloxane-modified alkenyl aromatic mm into polyphenylene ether resin.
Further, Japanese Patent Publication No. 49-6379 discloses a method of blending polyalkyl (meth)acrylate with polyphenylene ether resin to improve the strength of resin molded products. However, the current situation is that none of these methods can provide satisfactory molded appearance and impact resistance.

[Means to solve the problem]

The present inventors conducted intensive studies on resin compositions to improve impact resistance and surface appearance while maintaining the excellent heat resistance and mechanical strength inherent in polyphenylene ether resin moldings. As a result, a specific proportion of polyorganosiloxane was By combining a composite rubber, a polyphenylene ether resin, and a polystyrene resin that have a structure in which the rubber component and polyalkyl (meth)acrylate rubber component are intertwined with each other so that they cannot be separated, the compatibility between these resins is good. When molded, a resin composition that does not cause delamination, has significantly improved impact resistance and surface appearance, has excellent heat resistance and mechanical strength, and has excellent moldability and fluidity can be obtained. We have discovered this and arrived at the present invention.

That is, the gist of the present invention is that (A) a polyphenylene ether resin, (B) an alkenyl aromatic resin, and (C) a polyorganosiloxane rubber component of 10 to 90% by weight and a polyalkyl (meth)acrylate rubber component of 10 to 90% by weight.
The polyorganosiloxane rubber component and the polyalkyl (meth)acrylate rubber component have a total amount of 1.
This is a polyphenylene ethyl resin composition containing as a constituent component a composite rubber having an average particle diameter of 0.08 to 0.6 μm, which is 00 g%.

The polyphenylene ether resin (A) used in the present invention has the following formula (wherein Ql-Q4 are each uniquely selected from the group consisting of hydrogen and hydrocarbon groups, and m represents a number of 30 or more). The expressed homopolymer or copolymer.

Specific examples of such polyphenylene ether resins include poly(2,6-dimethyl-1,4-)unicine) ether, poly(2,6-diether-1,4-phenylene) ether, and poly(2,6-cyclobyl- 1,4-phenylene)ether, poly(2-methyl-6-ethyl-1,4-
phenylene) ether, poly(2-methyl-6-propyl-1°4-phenylene) ether, poly(2-ether-6-broby-1,4-phenylene) ether, (2
,6-dimethyl-1,4)unishin)ether and (2,
Copolymer with 3,6-trimethy/I/-1,4-phenylene) ether, (2,6-dinithyl-1°4-phenylene) ether and (2,3,6-)dimethyl-1,4-
Examples include a copolymer of (phenylene)ether, a copolymer of (2,6-dimethyl-1,4-)unicine)ether and (2,3,6-dryethyl-1,4-phenylene)ether, and the like.

In particular, poly(2,6-dimethyl-1,4-phenylene) ether, (2,6-dimethyl-1,4-phenylene) ether and (2,3,6-dorimethy/I/-1°4-
Copolymers with phenylene) ether are preferred, and poly(2,6-dimethyl-1,4-phenylene) ether is more preferred. Cholera polyphenylene ether resin is compatible with polystyrene resin at any blending ratio.

The degree of polymerization of the polyphenylene ether resin used in the present invention is not particularly limited, but the reduced viscosity at 25°C in chloroform solvent is 0.3 to 0.7 dt//
Those are preferably used. Those with a reduced viscosity of less than 0.3 di/7 tend to have poor thermal stability;
Moreover, if the reduced viscosity exceeds 0.7 dt//, moldability tends to be impaired. These polyphenylene ether resins can be used alone or in combination of two or more.

Alkenyl aromatic resin (B) used in the present invention
is the following formula (in the formula, Y is a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, 2 is a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, l is O or a number of 1 to 3) show. ) It is a homopolymer composed of 50% by weight or more of aromatic vinyl monomer units represented by the following formula or a copolymer with other copolymerizable vinyl monomers.

Specific examples of such alkenyl aromatic resins include polystyrene, polychlorostyrene, polybromstyrene, polyα-methylstyrene, styrene-acrylonitrile copolymer, styrene-methyl methacrylate copolymer, styrene-maleic anhydride copolymer, Examples include styrene-maleimide copolymer, styrene-N-phenylmaleimide copolymer, styrene-acrylonitrile-α-methylstyrene terpolymer, and polystyrene is particularly preferred.

Further, the composite rubber used in the present invention has a polyorganosiloxane rubber component of 10 to 90% by weight, preferably 20% by weight.
~80% by weight and polyalkyl (meth)acrylate rubber component 10-90% by weight, preferably 20-80% by weight (
The total amount of each rubber component is 100% by weight), and the majority of both components are physically intertwined or have chemical bonds, so that they are virtually inseparable. be. If the polyorganosiloxane rubber component constituting the composite rubber exceeds 90% by weight, it is not preferable because the molded surface appearance of the molded product from the resulting resin composition will deteriorate. Moreover, if the polyalkyl (meth)acrylate rubber component exceeds 90% by weight, the impact resistance of the molded product obtained from the resin composition will deteriorate, which is not preferable.

The average particle diameter of the composite rubber is preferably in the range of 0.08 to 0.6 μm. If the average particle size is less than 0.08 μm, the impact resistance of the molded product obtained from the resin composition will deteriorate, and if the average particle size exceeds 0.6 μm, the impact resistance of the molded product obtained from the resin composition will deteriorate. This is not preferable because it deteriorates the impact resistance and the appearance of the molded surface. Emulsion polymerization is optimal for producing composite rubber having such an average particle size.

The polyorganosiloxane rubber components constituting the above composite rubber include the organosiloxane and crosslinking agent (1) shown below.
can be prepared by emulsion polymerization using
Furthermore, a grafting agent (1) can also be used in combination.

The organosiloxane includes various cyclic bodies having 3 or more membered rings, and 3- to 6-membered rings are preferably used. For example, hexamethylcyclotrisiloxane, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane,
Examples include trinotyltriphenylcyclotrisiloxane, tetramethyltetraphenylcyclotetrasiloxane, and octamethylcyclotetrasiloxane, which may be used alone or in combination of two or more. The amount of these used is 50% by weight or more in the polyorganosiloxane rubber component, preferably 70:! % or more.

As the crosslinking agent (1), a trifunctional or tetrafunctional silane crosslinking agent such as trimethoxymethylsilane, triethoxyphenylsilane, tetramethoxysilane, tetraethoxysilane, tetra-n-propoxysilane, tetrabutoxysilane can be used. etc. are used. Particularly preferred are tetrafunctional crosslinking agents, and among these, tetraethoxysilane is particularly preferred. The amount of crosslinking agent used is 0.1 to 30% by weight in the polyorganosiloxane rubber component.

The graft cross-agent (I) can be represented by the following formula (12) (in each formula, a+ is a methyl group, ethyl group, propyl group or phenyl group, nR is a hydrogen atom or a methyl group, n is 0, 1 or 2, p represents a number from 1 to 6.) Compounds that can form a unit represented by the formula (p represents a number from 1 to 6) are used. (Meth)acryloyloxysiloxane that can form the unit of formula (1-1) has a high grafting efficiency, so it is possible to form an effective graft chain and is advantageous in terms of impact resistance.

Note that methacryloyloxysiloxane is particularly preferred as a compound capable of forming the unit of formula (1-1). Specific examples of methacryloyloxysiloxane include β-methacryloyloxyethyldimethoxymethelsilane, r-methacryloyloxyglobylmethoxydimethylsilane, and γ-
Examples include methacryloyloxyglobil dimethoxymethylsilane, γ-methacryloyloxyglobil trimethoxysilane, γ-methacryloyloxyglobyl ethoxydiethylsilane, γ-methacryloyloxyglobil diethoxymethylsilane, δ-methacryloyloxybutyljethoxymethylsilane, etc. It will be done. The amount of the grafting agent used is 0 to 10% by weight in the polyorganosiloxane rubber component.

The latex of this polyorganosiloxane rubber component can be produced using, for example, the methods described in US Pat. No. 2,891,920 and US Pat. No. 3,294,725. In the practice of the present invention, for example, an organosiloxane and a crosslinking agent (1) and optionally a grafting agent (1) can be used.
) and water in the presence of a sulfonic acid emulsifier such as alkylbenzenesulfonic acid or alkylsulfonic acid using a homogenizer or the like. It is suitable because it acts as an emulsifier for organosiloxane and at the same time serves as an initiator during polymerization.At this time, when a metal salt of alkylbenzenesulfonate or a metal salt of alkylsulfonate is used in combination, it is possible to maintain the polymer stably during graft polymerization. It is preferable because it is effective.

Next, the polyalkyl (meth)acrylate rubber component constituting the composite rubber can be synthesized using the alkyl (meth)acrylate and crosslinking agent (II) shown below.

Examples of alkyl (meth)acrylates include alkyl acrylates such as methyl acrylate, ethyl acrylate, D-propyl acrylate, n-butyl acrylate, and 2-ethylhexyl acrylate, and hexyl methacrylate, 2-ethylhexyl methacrylate,
Alkyl methacrylates such as n-lauryl methacrylate can be mentioned, with n-butyl acrylate being particularly preferred.

Examples of the crosslinking agent (n) include ethylene glycol dimethacrylate, propylene glycol dimethacrylate, 1,3-butylene glycol dimethacrylate, 1,
Examples include 4-butylene glycol dimethacrylate, allyl methacrylate, triallyl cyanurate, triallyl isocyanurate, and the like. These crosslinking agents may be used alone or in combination of 211 or more. The amount of these crosslinking agents used is 0.1 in the polyalkyl (meth)acrylate rubber component.
~20% by weight.

Polymerization of the polyalkyl (meth)acrylate component is carried out by adding the alkyl (meth)acrylate to the latex of the polyorganosiloxane rubber component, which has been neutralized by adding an aqueous alkali solution such as sodium hydroxide, potassium hydroxide, or sodium carbonate. After adding the agent and impregnating it into polyorganosiloxane rubber particles, a conventional radical polymerization initiator is applied. As the polymerization progresses, a crosslinked network of polyalkyl (meth)acrylate rubber is formed that is intertwined with the crosslinked network of polyorganosiloxane rubber, and the polyorganosiloxane rubber component and polyalkyl (meth)acrylate rubber component are virtually inseparable. Obtain composite rubber latex. In carrying out the present invention, the main skeleton of the polyorganosiloxane rubber component of this composite rubber has repeating units of dimethylsiloxane, and the main skeleton of the polyalkyl (meth)acrylate rubber component has an n-
A composite rubber having repeating units of butyl acrylate is preferably used.

The composite rubber thus prepared by emulsion polymerization is
Since the polyorganosiloxane rubber component and the polyalkyl (meth)acrylate rubber component are tightly intertwined, they cannot be extracted and separated using ordinary organic solvents such as acetone and toluene.

The gel content measured by extracting this composite rubber with toluene at 90° C. for 12 hours is 80% by weight or more.

In the resin composition of the present invention, polyphenylene ether resin (A) (hereinafter referred to as component (A)), polystyrene resin (B) (hereinafter referred to as component (B)), and composite rubber graft copolymer (C) (hereinafter referred to as component (C)) can be combined in a wide range of proportions. In addition, the resin composition of the present invention has a component (A) of 20 to 80% based on the weight of the entire resin composition! Amount%, component (B) is 20
Preferably, the composition is comprised between 75% by weight and component (C) between 1 and 40% by weight.

If component (A) is less than 20% by weight, heat resistance tends to be insufficient, and if it exceeds 80% by weight, flow characteristics tend to deteriorate and moldability tends to decrease. Furthermore, if component (B) is less than 20% by weight, it tends to be difficult to balance moldability and heat resistance;
When it exceeds 75% by weight, it tends to be difficult to maintain a balance between impact resistance and heat resistance. Furthermore, if component (C) is less than 1% by weight, the impact resistance performance improvement effect tends to be insufficient, and if it exceeds 40% by weight, the content of composite rubber increases and mechanical strength tends to decrease. It is durable enough to be used (kunaro).

The resin composition of the present invention provides a molded product with excellent heat resistance and impact resistance, especially impact resistance at low temperatures, and also has excellent fluidity. By changing the blending ratio, the level of heat resistance can be freely designed from the level of ultra-heat-resistant resins to that of ordinary heat-resistant resins. Furthermore, the ingredients (
By changing the blending ratio of C), the impact resistance and surface appearance of the molded product can be freely designed.

As a method for preparing the resin composition of the present invention, powdered or pelleted components (A), (B), and (C) are mechanically mixed using a known device such as a Panburi mixer, a roll mill, or a twin-screw extruder. or mix the latex of component (B) and the latex of rH<c) and pour it into hot water in which a metal salt such as calcium chloride or magnesium sulfate is dissolved and salt out. A mixed powder of component (B) and component (C) obtained by coagulation and drying and powdered or pelleted component (A) are shaped into a pellet shape by the same method as above, or further the above components are formed into a pellet shape by the same method as above. Mixed powder of (B) and component (C) and powdered or pelleted component (A) and component (B)
) are mechanically mixed using a known device such as a panburi mixer, a roll mill, or a twin-screw extruder in the same manner as described above and shaped into pellets, but the method exemplified last is preferably used.

Furthermore, stabilizers, plasticizers, lubricants, flame retardants, pigments, fillers, etc. may be added to the resin composition of the present invention, if necessary. Specifically, stabilizers such as triphenyl phosphite; lubricants such as polyethylene wax and polypropylene wax; phosphate flame retardants such as triphenyl phosphate and tricresyl phosphate; brominated retardants such as decabromo biphenyl and decabromo biphenyl ether; Examples include flame retardants such as flame retardants and antimony trioxide; pigments such as titanium oxide, zinc sulfide, and zinc oxide; fillers such as glass fiber, asbestos, wollastonite, mica, and Merck.

〔Example〕

The present invention will be specifically explained below with reference to Examples. In the following description, all "parts" mean parts by weight.

The physical properties in each Example and Comparative Example were measured by the following methods.

Izotsu impact strength: According to the method of ASTM D256.

(With 1/4' notch, measured at 23°C) Vicat softening temperature: According to the method of ISOR306.

Melt index: According to the method according to ASTM 01238.

(Measurement value at 200° C. under 50% load) Gloss: According to the method of ASTM D 523-62T (60′ specular gloss).

Reference Example 1 Manufacture of composite rubber (S-1): 2 parts of tetraethoxysilane, 0.5 parts of γ-methacryloyloxyglobil dimethoxymethylsilane and 97.5 parts of octamethylcyclotetrasiloxane were mixed, and 100 parts of the siloxane mixture I got it.

Distilled water containing 1 part each of sodium dodecylbenzenesulfonate and dodecylbenzenesulfonic acid dissolved in 20
100 parts of the above mixed siloxane were added to 0 parts, and after pre-stirring at 10,000 rpm with a homogenizer, milk was stirred with a homogenizer at a pressure of 300 kg/art.
The mixture was dispersed to obtain organosiloxane latex. This mixed solution was transferred to a separable flask equipped with a condenser and stirring blades, heated at 80"C for 5 hours without stirring and then left at 20°C. After 48 hours, the pH of this latex was adjusted with an aqueous sodium dispersion solution. was neutralized to 7.5, and 1 reaction was completed to obtain polyorganosiloxane rubber latex-1.The polymerization rate of the obtained polyorganosiloxane rubber was 88.5%, and the average particle size of the polyorganosiloxane rubber was 88.5%. The diameter was 0.16 μm.

11 of the above polyorganosiloxane rubber latex-1
Collect 9 parts, put them in a separable flask equipped with a stirrer, add 57.5 parts of distilled water, replace with nitrogen, and heat at 50°C.
A mixture of 33.95 parts of n-butyl acrylate, 1.05 parts of allyl methacrylate, and 0.26 parts of tert-butyl hydroperoxide was charged and stirred for 30 minutes. Infiltrated into siloxane rubber particles. Next, a mixture of 0.002 parts of ferrous sulfate, 0.006 parts of ethylenediaminetetraacetic acid disodium salt, 0.26 parts of Rongarit and 5 parts of distilled water was charged to start radical polymerization, and then the mixture was heated at an internal temperature of 70°C for 2 hours. The polymerization was completed by holding for a certain period of time to obtain a composite rubber latex. A portion of this latex was sampled and the average particle size of the composite rubber was measured and found to be 0.19 μm. Further, this latex was dried to obtain a solid substance, which was extracted with toluene at 90°C for 12 hours, and the gel content was measured and found to be 97.3% by weight. The polymer solid content of this latex was 32.4% by weight.

Reference Example 2 Manufacture of composite rubber (S-2, 5-3): Using the polyorganosiloxane rubber latex-1 obtained in Reference Example 1, polyorganosiloxane rubber and n-butyl acrylate were prepared as shown in Table 1. Composite rubbers having various composition ratios of allyl methacrylate and allyl methacrylate were produced in the same manner as in Reference Example 1. The manufacturing conditions and properties of the composite rubber obtained are also shown in Table 1.

Table 1 Reference Example 3 Manufacture of composite rubber (S-4): In the production of polyorganosiloxane rubber in Reference Example 1, 0.5 part of γ-methacryloyloxypropyldimethoxymethylsilane and 9765 parts of octamethylcyclotetrasiloxane were added. Composite rubber (S-4) latex was obtained by polymerization under the same conditions as in Reference Example 1 except that 98 parts of octamethylcyclotetrasiloxane was used instead.

The average particle diameter of this composite rubber was 0.19 μm, and the gel content was 93.0% by weight. Further, the polymer solid content of this latex was 32.4 iJ1% tared.

Reference Example 4 Crafting of composite rubber (S-5) 2 In Reference Example 1, n
- Polymerization was carried out under the same conditions as in Reference Example 1 except that 50 parts of butyl acrylate was used to obtain a composite rubber (S-5) latex. The average particle size of this composite rubber is 0.18 μm
, the gel content was 71.2% by weight. Further, the polymer solid content of this latex was 32.4% by weight.

Reference Example 5 Production of styrene polymer (B-1): In a separable flask equipped with a stirrer, add 195% distilled water,
Styrene 509. )” 2 parts of sodium decylbenzenesulfonate, 0.2 parts of tert-butyl hydroperoxide
After purging with nitrogen, the temperature was raised to 60°C, and a mixture of 0.002 parts of ferrous sulfate, 0.006 parts of ethylenediaminetetraacetic acid disodium salt, 0.26 parts of Rongalite, and 5 parts of distilled water was added to create radicals. Polymerization was started, and then a mixed solution of 50 parts of styrene and 0.2 parts of tert-butyl hydroperoxide was added dropwise over 1 hour at an internal temperature of 65°C.
The polymerization was completed by holding at 65°C for 1 hour. The average particle diameter of the obtained styrene polymer latex was 0,511 μm, and the polymer solid content was 32% by weight.

Reference Example 6 Various composite rubber latexes obtained in Reference Examples 1 to 4 (S-1)
(S-5) and the styrene polymer latex (B-1) obtained in Reference Example 5 were mixed in the proportions shown in Table 2 to obtain a mixed latex of 6 styrene. These mixed latexes were added dropwise to 1.5% by weight of calcium chloride hot water and stirred, solidified, separated, washed, and heated to 80°C for 1 hour.
After drying for 2 hours, mixtures (M-1) to (M-6) of six types of composite rubber and styrene polymer were obtained. The respective contents of the composite rubber and styrene 1 combination in these mixtures (M-1) to (M-6) are also shown in Table 2.

Table 2 Examples 1 to 6, Comparative Examples 1 to 2 Mixture of composite rubber and styrene polymer obtained in Reference Example 6 (M
-1) to (bi-6), poly(2,6-dimethyl-1.4-)unilene) ether (hereinafter referred to as PPE) has a reduced viscosity (ηIlp/C) of 0.59 di// measured at 25°C in chloroform. Polystyrene having a melt index of 7//10 minutes was blended in the amounts shown in Table 3 to prepare resin compositions (Examples 1 to 6).

In addition, the above PPE is 40 parts and the above melt index is 7P.
A resin composition was prepared (Comparative Example 1) consisting of 60 parts of polymethic acid 2/10 minutes. Furthermore, the polybutadiene content is 8% by weight and the gel content is 13.3! :jL% high impact polystyrene (hereinafter referred to as IIPS) 6
A resin composition was prepared consisting of 0 parts of PPE used in Example 1 and 40 parts of PPE used in Example 1 (Comparative Example 2).

Each of these eight types of resin compositions was
They were each supplied to a ZSK-30 model (manufactured by Faudler Co., Ltd.), melted and kneaded at a cylinder temperature of 280°C, and shaped into pellets. After drying each of the obtained pellets, they were fed to an injection molding machine (Sumitomo Heavy Industries Gromat 185/75g) and injection molded at a cylinder temperature of 280°C and a mold temperature of 60°C to obtain various test pieces. Table 3 shows the results of evaluating various physical properties using the test pieces.

As is clear from the results of Examples 1 to 6 and Comparative Example 1 in Table 3, it can be seen that the impact resistance of molded products made of the resin composition of the present invention is significantly improved. Furthermore, it can be seen that the molded product made of the resin composition of the present invention has excellent impact resistance and molded surface gloss compared to Comparative Example 2, which is known as a conventional modified polyphenylene ether resin.

〔Effect of the invention〕

The resin composition of the present invention is made by blending a polyphenylene ether resin, an alkenyl aromatic resin, and a specific composite rubber, and provides a molded product with excellent impact resistance, heat resistance, and molded appearance, and also has moldability and moldability. It is a composition with excellent fluidity and has excellent industrial effects.

Patent applicant: Mitsubishi Rayon Co., Ltd. Agent: Patent attorney Toshio Sawa

Claims (1)

[Scope of Claims] 1. (A) polyphenylene ether resin, (B) alkenyl aromatic resin, and (C) 10 to 90% by weight of polyorganosiloxane rubber component and 10 to 90% by weight of polyalkyl (meth)acrylate rubber component
The polyorganosiloxane rubber component and the polyalkyl (meth)acrylate rubber component have a total amount of 1.
A polyphenylene ether resin composition containing 0.00% by weight of a composite rubber having an average particle diameter of 0.08 to 0.6 μm as a constituent component. 2. The composite rubber contains a polyorganosiloxane rubber component obtained by emulsion polymerization using an organosiloxane, a crosslinking agent, and optionally a grafting agent, and an alkyl (meth)acrylate in this polyorganosiloxane rubber component.
2. The polyphenylene ether resin composition according to item 1, comprising a polyalkyl (meth)acrylate rubber component obtained by polymerizing after impregnating it with a crosslinking agent. 3. The main skeleton of the polyorganosiloxane rubber component has repeating units of dimethylsiloxane, and the main skeleton of the polyalkyl (meth)acrylate rubber component has repeating units of n-butyl acrylate according to item 1 or 2. Polyphenylene ether resin composition. 4. The polyphenylene ether resin composition according to item 1, wherein the gel content of the composite rubber measured by toluene extraction is 80% by weight or more.