JPH01282239A - Impact resistant resin composition - Google Patents

Abstract

PURPOSE:To obtain the title composition having excellent moldability and flowability and capable of providing moldings having excellent impact resistance, weather resistance, friction characteristics and surface appearance by blending a composite rubber having mutually combined structure with a vinyl based polymer. CONSTITUTION:The aimed composition obtained by blending (A) a composite rubber obtained by impregnating (ii) methyl acrylate, etc., into (i) a rubber latex of polyorganosiloxane obtained by subjecting the hexamethylcyclotrisiloxane, etc., to emulsion polymerization and then subjecting the component i to radical polymerization with the component ii and having 0.08-0.6mum average particle size with (B) a vinyl based polymer obtained by polymerizing either one of an aromatic alkenyl compound (e.g., styrene), vinyl cyanide (e.g., acrylonitrile) and (meth)acrylic acid ester, preferably at an amount of the component B of 5-85wt.% based on the total resin composition and kneading the blend, e. g., with a roll mill, etc.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides an impact-resistant resin that provides molded products with excellent impact resistance, weather resistance, friction properties, and surface appearance, and has excellent moldability, fluidity, etc. The present invention relates to a composition.

[Summary of the invention]

The present invention provides a composite rubber consisting of a polyorganosiloxane rubber component and a topolyalkyl (meth)acrylate rubber component, and at least one vinyl compound selected from the group consisting of aromatic alkenyl compounds, vinyl cyanide compounds, and (meth)acrylic acid esters. By blending a vinyl polymer whose main component is a vinyl monomer, a molded product with significantly improved impact resistance, weather resistance, friction properties, and surface appearance, etc., can be obtained, and it has excellent moldability and fluidity. This makes it possible to provide a resin composition.

[Problem to be solved by the prior art and the invention] In general, an impact-resistant resin is formed from a rubber layer and an IJTx layer, and the rubber layer has a glass transition temperature (hereinafter abbreviated as 6) as much as possible. ) is said to be advantageous in absorbing impact energy.

This means that for the same rubber content, a resin that uses polybutadiene resin with a Tg of 180°C, that is, an ABS resin, has a higher impact resistance than an impact-resistant resin that uses polybutyl acrylate resin with a Tg of 180°C. This is clear from the fact that it has excellent impact resistance. This allows Tg
If polydimethylsiloxane, which has a temperature of -123° C., can be used as a rubber source for impact-resistant resins, it is believed that a resin superior to ABS resins can be produced. However, polyorganosiloxanes generally have poor reactivity with vinyl monomers, making it difficult to form chemical bonds. Several methods have been disclosed for forming bonds between these image components, but these methods have not always been satisfactory. For example, US Pat. No. 3,898,300 discloses that a graft copolymer is formed by graft polymerizing a vinyl monomer to a polydimethylsiloxane polymer containing vinyl loxane or allyl siloxane, thereby improving impact strength. has been reported.

Further, US Pat. No. 4,071,577 describes a method of using a mercapto group-containing siloxane instead of a vinyl group-containing siloxane to further improve impact strength. In other words, the impact strength changes significantly due to the inclusion of mercapto groups in the polydimethylsiloxane-mercaptoprobylsiloxane copolymer, indicating that the presence of a graft copolymer via mercapto groups improves impact properties. .

Further, JP-A No. 60-252613 discloses that a polyorganosiloxane-based Gofuft copolymer containing a methacryloyloxy group has improved impact resistance.

However, with these methods, satisfactory molded appearance and impact resistance cannot be obtained due to defects in the surface appearance of the molded product, insufficient surface hardness, etc. due to defects in the silicone rubber structure.

[Means to solve the problem]

In view of the above-mentioned current situation, the present inventors conducted extensive studies on resin compositions for improving impact resistance, surface appearance, etc., and found that a composite consisting of a polyorganosiloxane rubber component and a polyalkyl C meth)acrylate rubber component. By combining rubber and vinyl polymer, we can provide a molded product that has good compatibility between these resins and has significantly improved impact resistance, weather resistance, friction properties, and surface appearance.
The inventors have now discovered that a resin composition with excellent moldability, fluidity, etc. can be obtained, and have thus arrived at the present invention.

That is, the present invention provides a structure in which (10 to 90ii% of the Al polyorganosiloxane rubber component and 10 to 9L laft of the polyalkyl (meth)acrylate rubber component are intertwined with each other so that they cannot be separated, and A composite rubber having an average particle diameter of α08 to a6 μm in which the total amount of the siloxane rubber component and the tophoralkyl (meth)acrylate rubber component is 100% by weight, and (Bl) an aromatic alkenyl compound, a vinyl cyanide compound, and a (meth)acrylic acid ester. 70 to 100 weight percent of at least one vinyl monomer selected from the group consisting of 0 to 60 weight percent of another vinyl monomer copolymerizable therewith.
This is an impact-resistant resin composition comprising a vinyl polymer obtained by polymerizing % by weight.

The composite rubber used in the present invention refers to a polyorganosiloxane rubber component of 10 to 90 M-m s and a polyalkyl (meth)acrylate rubber component of 90 to 10 M-m
% (the total amount of each rubber component is 100% by weight), and both rubber components are entangled with each other to have an indented structure that cannot be substantially separated, and the average particle size is CLO8 to α6 μm.

The characteristics of the resin composition of the present invention cannot be obtained even if any one of a polyorganosiloxane comb component and a polyalkyl (meth)acrylate rubber component or a simple mixture thereof is used as a rubber source instead of the above composite rubber. First, polyorganosiloxane rubber component and polyalkyl (
It is only when the meth)acrylate rubber components are intertwined with each other and integrated into a composite that a resin composition can be obtained that provides a molded article with excellent impact resistance, weather resistance, friction properties, and molded surface appearance.

Moreover, if the polyorganosiloxane rubber component constituting the composite rubber exceeds 90% by weight, the appearance of the molded surface of the molded product from the resulting resin composition will deteriorate, and polyalkyl (meth)
When the acrylate rubber component exceeds 90 weights and 1 weight, the impact resistance of molded products obtained from the resulting resin composition deteriorates. Therefore, the difference in b between the two rubber components constituting the composite rubber is 10 to 90% by weight (however, the total amount of both rubber components is 10 to 90% by weight).
It is necessary that the amount is in the range of 0 weight ff 1%), and more preferably in the range of 20 to 80 weight %. It is necessary that the average particle diameter of the composite rubber is in the range of 0.08 to α6 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. As the temperature deteriorates, the appearance of the molded surface also deteriorates. Emulsion polymerization is the most suitable method for producing composite rubber with such an average particle size.First, polyorganosiloxane rubber latex is processed into FI L, and then fullkyl (meth)acrylate rubber synthesis material 11 is processed into polyimide. It is preferable to impregnate the rubber particles of organosiloxane rubber latex and then polymerize the synthetic monomer A.
o The polyorganosiloxane rubber component constituting the above composite rubber can be prepared by emulsion polymerization using the organosiloxane and crosslinking agent shown below. You can also do it.

Examples of organosiloxanes include various cyclic bodies having three or more members, and 6- to 6-membered corals are preferably used. For example, hexamethyl cyclotolinoxane, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexaneroxane,
Examples include trinonal trifluoride diN-crotrisiloxane, tetramethyltetraphenylcyclotetrasiloxane, octaphenylcyclotetrasiloxane, and the like, and these may be used alone or in a mixture of two or more. The amount used is 3011fi in the polyorganosiloxane rubber component.
4 or more, preferably 70% by weight or more.

Examples of the crosslinking agent include hexafunctional or tetrafunctional crosslinking agents such as trimethoxymethylsilane, triethoxyphenylsilane, tetramethoxysilane, tetraethoxysilane, tetra-n-propoxysilane, and tetrabutoxysilane. etc. are used. Particularly preferred are tetrafunctional crosslinking agents, and among these, tetraethoxysilane is particularly preferred. The amount of crosslinking agent used is 11 to 303 ji in the polyorganosiloxane rubber component.

The grafting agent (1) is the following formula (0%) (In each formula, R1 is a methyl group, ethyl group, propyl group or phenyl group, R2 is a hydrogen atom or a methyl group, n is 0.1 or 2, p A compound or the like that can form a unit represented by (indicates the number 1 to 6) is 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-methacryloyloxyethyldimethoxymethylsilane, γ-methacryloyloxychloropylmethoxydimethylsilane, and γ-methacryloyloxyethyldimethoxymethylsilane.
Examples include methacryloyloxypropyldimethoxymethylsilane, γ-methacryloyloxypropyltrimethoxysilane, γ-methacryloyloxypropylethoxydiethylsilane, γ-methacryloyloxypropyljethoxymethylsilane, δ-methacryloyloxybutyljethoxymethylsilane, and the like. The amount of the grafting agent used is 0 to 10% by weight of the polyorganosiloxane rubber component.

The latex of the conopolyorganosiloxane 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) in the presence of a sulfonic acid emulsifier such as argylbenzenesulfonic acid or alkylsulfonic acid,
For example, it is preferable to manufacture by a method of shear mixing with water using a homogenizer or the like. Alkylbenzenesulfonic acid is suitable because it acts as an emulsifier for organosiloxane and at the same time serves as a polymerization initiator. At this time, it is preferable to use an alkylbenzenesulfonic acid metal salt, an alkylsulfonic acid metal salt, or the like in combination, since this is effective in keeping the polymer stable during graft polymerization.

Next, the polyalky A/(meth)acrylate rubber component constituting the above composite rubber is the alkyl/L/(meth) shown below.
It can be synthesized using acrylate and crosslinking agent (II).

Examples of the alkyl (meth)acrylate include methyl acrylate, butyl acrylate, n-propyl acrylate, n-butyl acrylate, 2-ethylhexyl acrylate, etc. , n-lauryl methacrylate and other alkyl methacrylates, with n-butyl acrylate being particularly preferred.

Examples of the crosslinking agent (n) include ethylene glycol dimethacrylate, propylene glycol dimethacrylate, 1,5-butylene glycol dimethacrylate, 1,4-butylene glycol dimethacrylate, allyl methacrylate, triallyl cyanurate, and Examples include allylison annulate. These crosslinking agents may be used alone or in combination of two or more. The amount of these crosslinking agents used is 1 in the polyalkyl (meth)acrylate rubber component.
．． It is 1 to 20% by weight.

The polymerization of the polyalkyl (meth)acrylate rubber component is
The above alkyl (
After adding meth)acrylate and a crosslinking agent and impregnating them into polyorganosiloxane rubber particles, a conventional radical polymerization initiator is applied. As the polymerization progresses, a crosslinked network of polyalkyl/L/(meth)acrylate rubber is formed that is intertwined with the crosslinked network of polyorganosiloxane rubber, and it becomes virtually impossible to separate the polyalkyl/L/(meth)acrylate rubber component. A composite rubber latex with a rubber component is obtained. In addition, when carrying out the present invention, as this composite rubber, 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. Composite rubber is preferably used.

The composite rubber thus prepared by emulsion polymerization is a polyorganosiloxane rubber component topolyalkyl (meth).
Since the acrylic resin and the rubber component are tightly intertwined with each other, it 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 weight its or more.

Furthermore, the vinyl polymer (Bl
is 70 to 100% by weight of at least one vinyl monomer selected from the group consisting of aromatic alkenyl compounds, cyanated beer compounds, and (meth)acrylic acid esters, and other vinyl monomers copolymerizable with these. Monomer 0-30% by weight
It is a homopolymer or copolymer obtained by polymerizing.

Specific examples of aromatic alkenyl compounds include styrene, α
- Methyl styrene, vinyl toluene, etc., specific examples of vinyl cyanide compounds include acrylonitrile, methacrylate trile, etc., specific examples of acrylic esters include methyl acrylate, ethyl acrylate, butyl acrylate, etc., specific examples of methacrylic esters Examples include methyl methacrylate and 2-ethylhexyl methacrylate, which may be used alone or in combination of two or more. Other copolymerizable vinyl monomers may be used as desired, and the amount used is up to 303i in Bl. Other copolymerizable vinyl monomers Specific examples include ethylene, vinyl acetate, etc.In carrying out the present invention, this vinyl polymer (Bl can be used alone or in combination of two or more types. The manufacturing method is not particularly limited, and it can be obtained by emulsion polymerization, suspension polymerization, bulk polymerization, or the like.

The vinyl polymer (Bl) used in the present invention is blended for the purpose of improving moldability, etc., and its blending amount is preferably in the range of 5 to 85 M1ch based on the Mfk of the entire resin composition.

In carrying out the present invention, latexes or mixed latexes of composite rubber (Ni) and vinyl polymer (Bl) are poured into hot water in which a metal salt such as calcium chloride or magnesium sulfate is dissolved, salting out, It can be separated and recovered by coagulating.Also, the mixed latex of composite rubber ((transfer) and vinyl/L/based polymer (B) can be salted out, coagulated, and recovered polymer mixture can be further polymerized separately. The vinyl/l/based polymer (Bl may be mixed with the vinyl polymer (Bl) obtained separately. In this case, the method for producing the vinyl polymer (Bl) that is separately added is not particularly limited, and emulsion polymerization, suspension polymerization, Legal A can be obtained by a bulk polymerization method or the like.

The resin composition of the present invention may be prepared by mechanically mixing the ingredients using a known device such as a mixer, roll mill, or extruder, and shaping the mixture into pellets.

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 flaming agents, pyrophoric agents such as antimony dioxide; pigments such as titanium oxide, zinc sulfide, and zinc oxide; fillers such as glass fiber, asbestos, wollastonite, mica, and talc.

〔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 D 256.

(With 1/4″ notch) Vicat softening temperature: According to the method of ISOR306.

Gloss: According to the method of AS'l'MD 525-62T (60° specular gloss).

Dynstat strength retention rate: According to the method of rJLN 53435.

The dynstat strength of the test piece before exposure to the sunshine weather meter was set at 100 inches, and the ratio of the dynstat strength after each exposure time to that before exposure was defined as the retention rate.

Reference Example 1 Manufacture of composite rubber (S-1): 2 parts of Nato 2 Nidokifu 2F, 15 parts of r-methacryloyl oxineprobyl dimethoxymethylsilane and 97.5 parts of octamethylcyclotetrasiloxane were mixed, and 100 I got the department. Add 1 oa part of the above mixed siloxane to 200 parts of distilled water in which 1 part each of sodium dodecylbenzenesulfonate and dodecylbenzenesulfonic acid have been dissolved, and mix with a homomixer at 10.000 rp.
After pre-stirring at m, 300kl was added using a homogenizer.
Emulsification was carried out under a pressure of il/(7)2 to obtain an organosiloxane latex. This mixed solution was transferred to a separable flask equipped with a condenser and a stirring blade, heated at 80°C for 5 hours while stirring and mixing, and then left at 20°C.
The pg of this latex was neutralized to 7.5 with an aqueous IJ solution to complete the polymerization and polyorganosiloxane rubber latex-1 was obtained.

The polymerization rate of the obtained polyorganosiloxane rubber was E3a.
5%, and the average particle diameter of the polyorganosiloxane rubber was [L] 16 μm.

11 of the above polyorganosiloxane rubber latex-1
9 parts were collected, placed in a separable flask equipped with a stirrer, 57.5 parts of distilled water was added, and after purging with nitrogen, the mixture was heated at 30°C.
The temperature was raised to 3.595 parts of n-butyl acrylate and 1.5 parts of allyl methacrylate. A mixed solution of 1 part Os and 26 parts of Lθrt-butyl hydroperoxide α was charged and stirred for 30 minutes to allow this mixed solution to permeate into the polyorganosiloxane rubber particles. Next, a mixture of ferrous sulfate (1002 parts, disodium ethylenediaminetetraacetic acid disodium salt [1006 parts], Rongalit 126 parts, and 5 parts of distilled water) was charged to start radical polymerization, and then the internal temperature was maintained at 70°C for 2 hours to polymerize. By completing this process, a composite rubber latex was obtained. A portion of this latex was sampled and the average particle size of the composite rubber was measured, and it was found to be α19 μm. Also, this latex was dried to obtain a solid material, which was heated at 90°C with toluene. After extraction for 12 hours, 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, 5-5) Using the polyorganosiloxane rubber latex-1 obtained in Example 1, polyorganosiloxane rubber, n-butyl Composite rubbers with grooves having various composition ratios of acrylate and allyl methacrylate were produced in the same manner as in Reference Example 1. The manufacturing conditions and the properties of the composite rubber obtained are also shown in Table 1.

Table 1 Reference Example 3 Manufacture of composite rubber (s-a): In Reference Example 1, during the manufacture of Polio M ganosiloxane rubber, 0.5 part of γ-methacryloyloxypropyldimethoxymethylsilane and 97 parts of octamethylcyclotetrasiloxane were added. Polymerization was carried out under the same conditions as in Reference Example 1 except that 98 parts of octamethylcyclotetrasiloxane was used instead of 0.5 parts to obtain a composite rubber (B-4) latex. The average particle diameter of this composite rubber is α19μ, and the gel content is 9
It was 0% by weight. Further, the polymer solid content of this latex was 32.4% by weight.

Reference Example 4 Manufacture of composite rubber (S-S): In Reference Example 1, n was produced without using allyl methacrylate.
- Polymerization was carried out under the same conditions as in Reference Example 1 except that 30 parts of butyl acrylate was used to obtain a composite rubber (S-5) latex. The average particle diameter of this composite rubber is α18μm,
The gel content was 712M and 12% by weight. The polymer solid content of this latex was 32.4% by weight.

Reference Example 5 Production of acrylonitrile-styrene copolymer (B-1): In a separable flask equipped with a stirrer, 195 parts of distilled water,
After charging 35 parts of styrene, 15 parts of acrylonitrile, 2 m of sodium dodecylbenzenesulfonate, and 2 parts of tert-butyl hydroperoxide α and purging with nitrogen,
The temperature was raised to ℃, and 2 parts of ferrous sulfate α00, ethylenediaminetetraacetic acid disodium salt α00<5 parts, Rongalit 02
A mixture of 65 parts of styrene, 15 parts of acrylonitrile, and 2 parts of tsrt-butyl hydroperoxide α was added dropwise at an internal temperature of 65°C over 1 hour to start radical polymerization. 1 in °C
The polymerization was completed by holding for a certain time. The average particle diameter of the obtained acrylonitrile-styrene copolymer latex was 0.12.
The polymer solids content was 52% by weight.

Reference Example 6 Various composite rubber latexes obtained in Reference Examples 1 to 4 (s-1)
(S-S) and nine acrylonitri-styrene copolymer latex CB-1) obtained in Reference Example 5 were mixed in the amounts shown in Table 2 to obtain six types of mixed latexes. These mixed latexes were added dropwise to the same weight of calcium chloride 1.5 weight 1% hot water and stirred, solidified, separated,
After washing and drying at 80°C for 12 hours, a mixture of six types of composite rubber and acrylonitrile-styrene copolymer (M
-1) to (M-6) were obtained. Note that these mixtures (M-1
) to (M-6) The respective contents of the medium o composite rubber and the acrylonitrile-styrene copolymer are also shown in Table 2.

Table 2 Examples 1 to 6 Mixtures (M-1) to (M-6) of the composite rubber and acrylonitrile-styrene copolymer obtained in Reference Example 6 and reduced viscosity measured at 25°C in chloroform (wa 5p10) is α
A resin composition was prepared by blending 52 dL/f of acrylonitrile-styrene copolymer (acrylonitrile/styrene 22%/73% by weight) in the amounts shown in Table 5.

These various resin compositions were melt-kneaded using an extruder and shaped into pellet shapes. After drying each of the obtained pellets, an injection molding machine (manufactured by Sumitomo Machinery Co., Ltd., Zoromatsu l-1) was used.
65/75 type) to prepare various test pieces. The results of evaluating various physical properties using these various test pieces are shown in the third section.
Shown in the table.

From the results shown in Table 5 and Table 3, it can be seen that the composition of the present invention has excellent IT impact resistance and molded surface gloss.

Example 7 The test piece prepared in Example 1 and the test piece prepared in the same manner as in Example 1 using a commercially available ABS resin (manufactured by Mitsubishi Rayon ■, Diabet [F] 3001M) were subjected to OWL using a sunshine weather meter. The retention rate of Dynstat strength and the retention rate of gloss were measured. The results are shown in Table 4.

Table 4 Example 8 A friction/wear test was performed on the test piece prepared in Example 1 and the test piece prepared in the same manner as in Example 1 using commercially available ABS resin (Diabet ■1001 manufactured by Mitsubishi Rayon@). Comparison was made by Measurement is Toyo Baldwin KFM-111
The test piece tested using the same resin on both the rotating and stationary sides using a mold friction/wear tester was Sand Vapor 1soo.
Finished by number. The measurement results are shown in Table 5.

Table 5 From the results shown in Table 5, the test pieces made from the resin composition of the present invention had superior friction and wear properties compared to commercially available ABEi resins, had a small coefficient of dynamic friction, and had a small amount of specific wear. -0 Examples 9 to 10 Composite rubbers S-1 and S-2 obtained in Reference Example 1.2,! =7
IJ *Nitrile/α-methylstyrene = 30/7
0 (wt%) of acrylonitrile-α-methylstyrene copolymer separately produced by emulsion polymerization using a monomer mixture of 30% by weight of each of the composite rubbers, Two types of resin compositions were prepared by blending the resin compositions so that the amount was 70% by weight, and the resin compositions were melted and shaped into pellets. These two types of pellets were rotated in the same manner as in Example 1 to create various test pieces.

Various physical properties were measured using each of these test pieces. The results are shown in Table 6.

Table 6 As is clear from the results in Table 6, a resin composition having both high heat resistance and impact resistance can be obtained by blending with a vinyl polymer containing α-methylstyrene as an essential component. I understand that. Incidentally, the Vicat softening temperature of the test piece of the resin composition of Example 1 was 100°C.

〔Effect of the invention〕

The present invention blends the specific composite rubber specified in the present invention with a vinyl polymer, so it provides molded products with excellent impact resistance, weather resistance, friction properties, and surface appearance, and has excellent moldability and flowability. A resin composition with excellent properties and the like can be obtained.

Claims (1)

[Claims] 1. (A) Polyorganosiloxane rubber component 10-90
Weight% and polyalkyl (meth)acrylate rubber component 1
0 to 90% by weight have a structure in which they are intertwined with each other so that they cannot be separated, and the total amount of the polyorganosiloxane rubber component and the polyalkyl (meth)acrylate rubber component is 100% by weight.An average particle size of 0 .08~0.6μm
and (B) 70 to 100% by weight of at least one vinyl monomer selected from the group consisting of aromatic alkenyl compounds, vinyl cyanide compounds, and (meth)acrylic acid esters.
An impact-resistant resin composition comprising: and a vinyl polymer obtained by polymerizing 0 to 30% by weight of another vinyl monomer copolymerizable with these. 2. The composite rubber is a polyorganosiloxane rubber component obtained by emulsion polymerization using an organosiloxane, a crosslinking agent, and optionally a grafting agent, and this polyorganosiloxane rubber component is impregnated with an alkyl (meth)acrylate and a crosslinking agent. 2. The impact-resistant resin composition according to item 1, comprising a polyalkyl (meth)acrylate rubber component obtained by polymerizing the polyalkyl (meth)acrylate rubber component. 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. Impact resistant resin composition. 4. The impact-resistant resin composition according to item 1, wherein the gel content of the composite rubber measured by toluene extraction is 80% by weight or more.