JP2850457B2 - Antistatic resin composition - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION a. Industrial Field of the Invention The present invention relates to an aromatic vinyl compound and a hydrogenated product of a conjugated diene polymer or a diene copolymer comprising a conjugated diene and an aromatic vinyl compound. / Or (meta)
The present invention relates to an antistatic resin composition of a rubber-modified thermoplastic resin obtained by graft copolymerization of a monomer mainly containing an acrylate compound.

b. Conventional technology In general, synthetic resin products easily accumulate static electricity due to friction and the like, and various kinds of static electricity damages such as adsorption of dust due to electrification, shock to human body due to discharge, and generation of sparks are known.

Therefore, there is a method of applying an antistatic agent to a molded article as a means of preventing static electricity, or a method of mechanically kneading the material into a raw material resin at the time of molding processing. The antistatic agent comes off due to washing, etc.
Since it is difficult to maintain the effect for a long period of time, a method of mixing and mixing an antistatic agent into the resin itself is generally used to maintain the antistatic effect for a long period of time.

In this case, the speed at which the antistatic agent migrates (bleeds out) to the resin surface affects the antistatic effect. If the synthetic resin product requires transparency, the antistatic agent is kneaded to increase the transparency. The antistatic agent must be selected in consideration of these factors, because it must not cause damage or cause the resin surface to become white.

Rubber-modified thermoplastic resin has excellent molded appearance, weather resistance,
The impact resistance, clear color, and transparent grade have the above excellent properties and transparency. Utilizing its features, automotive parts (inside / outside), OA equipment printer covers,
It is used for lighting covers, carport roofs, signs, and road signs. In such applications, antistatic is particularly necessary. When imparting an antistatic ability to a rubber-modified thermoplastic resin made of a hydrogenated rubber kraft copolymer, among the antistatic agents generally known so far, cationic and amphoteric ionics have excellent antistatic effects. However, when it is mixed with a molded product, it has a disadvantage that it is colored and remarkably impairs the commercial value. Anionic type has poor compatibility with resin,
It is unsuitable for applications that require transparency or the sharpness of colored products. Nonionics have relatively excellent thermal stability and good compatibility with resins.

However, for example, a nonionic polyoxyalkylamine known so far has a considerable antistatic effect for a short period after the antistatic treatment, or the antistatic effect gradually decreases with time, Also, at the time of extrusion molding in a high temperature range, conventional antistatic agents such as poor compatibility with resin and gelation of rubber cause sharp color or transparency to be maintained, and It has been difficult to provide a long-lasting good antistatic ability while maintaining stability. Therefore, an object of the present invention is to provide an antistatic resin composition containing a rubber-modified thermoplastic resin having excellent antistatic ability without impairing excellent sharpness or transparency and surface appearance.

c. Problems to be solved by the present invention As a result of intensive studies on these points, the present inventors have selected alkylamine ethoxylates, glycerides and borate esters of mono- or diglycerides for rubber-modified thermoplastic resins. The present inventors have found that a desired amount of an antistatic resin composition can be obtained by blending a specific amount of one or more compounds, and reached the present invention.

d. Means for Solving the Problems The present invention provides a method for hydrogenating a polymer comprising 50 to 100% by weight of a conjugated diene and 0 to 50% by weight of an aromatic vinyl compound to form an olefinic unsaturated bond of the polymer. At least 70% by weight
Can be copolymerized with 30 to 100% by weight of a monomer (B) composed of an aromatic vinyl compound and / or an alkyl (meth) acrylate in the presence of a hydrogenated diene polymer (A) obtained by hydrogenation of To the rubber-modified thermoplastic resin obtained by graft copolymerization of 0 to 70% by weight of a monomer (C), alkylamine ethoxylate, glyceride and a mono- or a monomer represented by the following general formula (I) One or more compounds selected from borate esters of diglycerides
An object of the present invention is to provide an antistatic resin composition characterized by being incorporated in an amount of 0.05 to 10 parts by weight.

General formula (I) _{[(RCOO) m -XO n BOH)} p (R is an alkyl group having 8 to 24 carbon atoms, X is glycerol residue, m is 1 to 2, n is 1 to 3, p is 3 n) The hydrogenated diene polymer (A) used in claims (1) and (2) of the present invention will be described.

Examples of the conjugated diene include butadiene, isoprene, pentadiene, and 2,3-dimetal bradiene. Examples of the aromatic vinyl compound include styrene, paramethylstyrene, α-methylstyrene and the like. Preferred are butadiene and styrene.

The diene-based polymer before hydrogenation may be a homopolymer of a conjugated diene, a random copolymer of a conjugated diene and an aromatic vinyl compound, a block copolymer, a combination thereof, or a mixture thereof. When the hydrogenated diene polymer is a mixture of different types of diene polymers, they may be mixed before hydrogenation and then hydrogenated, or may be mixed after hydrogenation.

The content of the aromatic vinyl compound in the diene polymer is 0.
5050% by weight, preferably 5-40% by weight. 50
If the content is more than 10% by weight, the hydrogenated diene polymer of the present invention has resinous properties, and the impact resistance is undesirably reduced.

The microstructure of the diene polymer has a vinyl bond content of 1,2-, 3,4-, etc. of preferably 10% or more, more preferably 20 to 80%, particularly preferably 30 to 60% by weight. Ten
% Is not preferred because the hydrogenated diene polymer of the present invention has resin properties and the impact resistance is reduced.

The number average molecular weight of the diene polymer is preferably 5,000
11,000,000, more preferably 30,000-300,000. If it is less than 5,000, the hydrogenated diene polymer of the present invention does not become rubbery and becomes liquid, while if it exceeds 1,000,000, the processability tends to decrease, which is not preferable.

Specifically, the diene polymer of the present invention will be described. At least one A block or C block and at least B block
Copolymer containing block or A / B block, or B
Or a diene polymer represented by A / B, for example, the following:

A: Aromatic vinyl compound polymer B: Conjugated diene polymer A / B: Random copolymer of aromatic vinyl compound / conjugated diene C: Copolymer of compound of conjugated diene and aromatic vinyl and aromatic tapered block vinyl compound gradually increases (1) a-B (2 ) a-B-a (3) a-B-C (4) vinyl bond of _{a-B 1 -B 2 (B} 1 is preferably 20% above, the vinyl bond of B ₂ preferably less than 20%) (5) B ( 6) a / B (7) a-a / B (8) a-a / B-C (9) a-a / B -A (10) B ₂ -B ₁ -B ₂ (the vinyl bond of B ₁ is preferably 20% or more, and the vinyl bond of B ₂ is preferably less than 20%) (11) CB (12) CB -C (13) CA / BC (14) A diene polymer having a skeleton of CAB, and a copolymer having these basic skeletons repeatedly, or by coupling these. Obtained may be diene polymer.

(4) Japanese Patent Application No. Sho for A-B ₁ -B ₂ in 63-285774
No. (5) B and (6) A / B are disclosed in JP-A-63-12740.
No. 0.

About A-A / B of (7) and A-A / BC of (8),
Preferably, the ratio of the aromatic vinyl compound / conjugated diene is 5
-40 / 60-95% by weight, the total amount of the aromatic vinyl compound of A or A and C is 3-25% by weight of the total copolymer, and the vinyl bond content of the conjugated diene portion in A / B is 15%. (Particularly preferably 30 to 80%).

In the present invention, when the above-mentioned (4), (5), (6), (7), and (8) are used as the diene-based polymer, a more excellent object of the present invention can be obtained. preferable. Further, the use of (6), (7), and (8) is preferable because more excellent low-temperature characteristics and fatigue characteristics can be obtained.

The hydrogenated diene-based polymer of the present invention is obtained by hydrogenating the above-mentioned diene-based polymer. The hydrogenation ratio of the olefinically unsaturated bond of the diene polymer is at least 70%, preferably at least 90%. If the degree of hydrogenation is less than 70%, weather resistance and heat resistance decrease, which is not preferable.

The above-mentioned method for polymerizing a diene polymer and the method for hydrogenating a diene polymer are described in, for example, Japanese Patent Application No. 63-104256.
No.

The monomer used for the rubber-modified thermoplastic resin of the present invention will be described.

As the aromatic vinyl compound monomer, styrene, α-
Methyl styrene, methyl styrene, vinyl xylene, monochlorostyrene, dichlorostyrene, monobromostyrene, dibromostyrene, fluorostyrene, p-tert-butylstyrene, ethylstyrene, vinylnaphthalene, etc., of which one or two Used above. Preferred aromatic vinyl compounds are styrene or those containing 50% by weight or more of styrene in the aromatic vinyl compound.

Examples of the alkyl (meth) acrylate include methyl acrylate, ethyl acrylate, propylene acrylate, butyl acrylate, amyl acrylate, hexyl acrylate, octyl acrylate, and the like.
Alkyl acrylates such as 2-ethylhexyl acrylate, cyclohexyl acrylate, dodecyl acrylate, octadecyl acrylate, phenyl acrylate, and benzyl acrylate; methyl methacrylate, ethyl methacrylate, propylene methacrylate, butyl methacrylate, amyl methacrylate, hexyl methacrylate, octyl methacrylate, 2-
Examples include alkyl methacrylates such as ethylhexyl methacrylate, cyclohexyl methacrylate, dodecyl methacrylate, octadecyl methacrylate, phenyl methacrylate, and benzyl methacrylate.

Examples of the copolymerizable monomer (C) include vinyl cyanide such as acrylonitrile and methacrylonitrile;
Unsaturated anhydrides such as maleic anhydride, itaconic anhydride and citraconic anhydride; unsaturated acids such as acrylic acid and methacrylic acid; and maleimide, N-methylmaleimide, N-butylmaleimide, N- (P- Examples include α- or β-unsaturated dicarboxylic acid imide compounds such as methylphenyl) maleimide, N-phenylmaleimide and N-cyclohexylmaleimide.

When a vinyl cyanide compound is used, a product having more excellent impact resistance, chemical resistance, and coating property is obtained, and when a (meth) acrylic acid alkyl ester is used, a product having more excellent weather resistance is obtained. . Acrylonitrile is preferred as the vinyl cyanide compound, and methyl methacrylate is preferred as the alkyl (meth) acrylate.

Monomer (B) and monomer compound (C) comprising aromatic vinyl compound and / or (meth) acrylate
And (B) / (C) = 30 to 100/70 to 0, preferably 35 to 98/65 to 2, and more preferably 40 to 95/60 to
5 (% by weight).

Preferred monomer components for obtaining a rubber-modified thermoplastic resin having excellent moldability and impact resistance include 30 to 100% by weight of an aromatic vinyl compound monomer and (meth) acrylic acid ester and / or vinyl cyanide. 0-70% by weight of a monomer comprising, more preferably 35-98% by weight of the former monomer,
The latter monomer weighs 2 to 65 weight.

Preferred monomer components for obtaining a rubber-modified thermoplastic resin having an excellent balance of physical properties such as moldability, impact resistance, and chemical resistance are an aromatic vinyl compound and a vinyl cyanide compound, and the preferred usage ratio is aromatic. Vinyl compound / vinyl cyanide compound = 30-98 / 70-2, more preferably 6
0 to 95/40 to 5 (% by weight).

The monomer used in the rubber-modified thermoplastic resin of claim (2) comprises (meth) acrylate (D) and another monomer compound (E) copolymerizable therewith.

When the above (meth) acrylic acid alkyl ester monomer is used alone as a polymer, the glass transition temperature (measured by a differential scanning calorimeter (DSC)) of the polymer is 50 ° C. or higher. The group preferably has 1 to 10 carbon atoms, more preferably 1 to 6, particularly preferably 1 to 6.
4 things. Of the methacrylates and acrylates, methacrylates are preferred.
Examples of these include methyl methacrylate, ethyl methacrylate, cyclohexyl methacrylate, hydroxyethyl methacrylate, hydroxypropyl methacrylate,
T-butylcyclohexyl methacrylate, butyl methacrylate, hexyl methacrylate, represented by the following formula (meth)
Acrylic ester (N is 0 to 3, R is hydrogen or an alkyl group, m is 3 to
4) and the like, and one or more of these can be used. Of these, methyl methacrylate and ethyl methacrylate are preferred, and methyl methacrylate is more preferred.

Examples of other vinyl monomer compounds (E) copolymerizable with the (meth) acrylate monomer (D) include aromatic vinyl monomers such as styrene, α-methylstyrene, and vinyltoluene. Vinyl vinyl monomers such as acrylonitrile and methacrylonitrile; methyl acrylate, ethyl acrylate, propyl acrylate, butyl acrylate, hexyl acrylate, propyl methacrylate, butyl methacrylate, hexyl methacrylate, acrylic acid (Meth) acrylic acid alkyl ester monomers other than those used in the above (meth) acrylic acid alkyl esters such as cyclohexyl and cyclohexyl methacrylate; unsaturated acid anhydrides such as maleic anhydride and itaconic anhydride; acrylic acid; Unsaturated acids such as methacrylic acid: N-phenylmaleimide, N- Imide compounds of α- or β-unsaturated dicarboxylic acids such as cyclohexylmaleimide;

In order to obtain a transparent resin, when the (meth) acrylate and the copolymerizable monomer are used in combination, the refractive index of the hydrogenated diene polymer (A) and the monomer mixture (D ), The difference from the refractive index of (E) is 0.01 or less, preferably
It is preferable to carry out graft polymerization by appropriately selecting the composition of the monomer mixture so as to be 0.005 or less. Here, if the difference between the two refractive indexes exceeds 0.01, the transparency of the thermoplastic resin decreases.

The ratio of the (meth) acrylate and the monomer (D) copolymerizable therewith is not particularly limited, and can be appropriately determined according to the refractive index of the hydrogenated diene polymer (A). It is preferably from 30 to 98 to 70 to 2% by weight, more preferably from 50 to 95/50 to 5% by weight, and particularly preferably from 60 to 90/40 to 10% by weight.

The content of the hydrogenated diene polymer of the rubber-modified thermoplastic resin used in claims (1) and (2) is within the range in order to satisfy the impact resistance, moldability and transparency of the resin. Is 5
5050% by weight, preferably 10-40% by weight.

The rubber-modified thermoplastic resins according to claims (1) and (2) can be obtained by graft-polymerizing the monomers according to the respective claims in the presence of a hydrogenated diene polymer.

Further, a method of blending a polymer or a copolymer obtained by separately polymerizing the respective graft copolymers obtained by the graft polymerization and the respective monomers may be used, and a (co) polymer which is separately polymerized may be used. Is preferably the same as the one used in the graft polymerization.

Therefore, the rubber-modified thermoplastic resin composition according to claims (1) and (2) of the present invention comprises the above-mentioned graft copolymer or a copolymer of the graft copolymer and a (co) polymer separately polymerized. It consists of a mixture.

The (co) polymer separately polymerized here is a polymer of 30 to 100% by weight of the monomer (B) and 0 to 70% by weight of the monomer (C). The proportion of each monomer constituting the mixture with the copolymer shall not exceed the proportion of each monomer constituting the rubber-modified thermoplastic resin in the present invention.

The antistatic resin composition of the present invention is selected from alkylaminoethoxylates, glycerides, and borate esters of mono- or diglycerides based on 100 parts by weight of the rubber-modified thermoplastic resin according to claims (1) and (2). 0.05 to 10 parts by weight, preferably 0.1 to 10 parts by weight,
2 to 5 parts by weight are blended. If the amount is less than 0.05 part by weight, the antistatic effect cannot be obtained, while if it exceeds 10 parts by weight, the physical properties of the molded article are reduced.

Here, as the alkylamine ethoxylate in the antistatic agent used in the present invention, for example, N, N-bis (hydroxyethyl) alkylamine is preferable.

As the alkyl group of the N, N-bis (hydroxyethyl) alkylamine, an alkyl group having 8 to 18 carbon atoms is preferable, and within this range, a more excellent effect can be obtained. More preferably, the alkyl group of the N, N-bis (hydroxyethyl) alkylamine is an alkyl group having 8 to 18 carbon atoms, and the alkyl group having 12 carbon atoms is at least 35% by weight of all the alkyl groups, more preferably 40% by weight or more.

N, N-bis (hydroxyethyl) alkylamine is
It is obtained by adding ethylene oxide to a corresponding alkylamine, for example, laurylamine or cocoalkylamine in the absence of a catalyst. Of by-products. This by-product is preferably not more than 25%.

As the glyceride, diglyceride and triglyceride can be used, and among them, monoglyceride is preferable. Fatty acids include palmitic acid, stearic acid, ricinolenic acid, oleic acid, etc.
Are preferred.

As glyceride, the content of monoglyceride is
If it is 90% or more, preferably 93% or more, a better antistatic effect can be obtained.

Mono- or diglyceride borate ester is obtained by esterifying or transesterifying mono- or diglyceride with boric acid or lower alcohol ester of boric acid, or esterifying glycerin with boric acid or lower alcohol ester of boric acid. Alternatively, it can be obtained by an ester exchange reaction followed by an esterification reaction with a fatty acid. In addition, as fatty acids,
Capric acid, lauric acid, oleic acid, palmitic acid,
Stearic acid, behenic acid and the like can be mentioned.
Examples of the lower alcohol include methanol, ethanol, n-propyl alcohol, isopropyl alcohol, and n-butanol.

As a method for producing the antistatic resin composition, for example, a method in which the antistatic agent is added to a polymer solution of a polymerization system in which a rubber-modified thermoplastic resin is produced, a method in which a powder or a pellet of the rubber-modified thermoplastic resin is charged. For example, a method in which an inhibitor is blended and, if necessary, melt-blended.

The antistatic resin composition of the present invention can be formed into automobile parts, electric parts, household articles, various industrial articles, and the like by injection molding, extrusion molding, vacuum molding, irregular-shaped molding, foam molding, and the like. At this time, usual additives such as antioxidants, ultraviolet absorbers, lubricants, flame retardants, other antistatic agents, foaming agents, glass fibers and the like can be added.

e. Examples Next, the present invention will be described in more detail with reference to examples, but these are all illustrative and do not limit the scope of the present invention. In the following examples, parts and% indicate parts by weight and% by weight, respectively.

Method for producing hydrogenated diene-based polymer-based graft copolymer (rubber-modified thermoplastic resin) [G-1] Base rubber preliminarily made into a homogeneous solution in a stainless steel autoclave having a ribbon type stirring blade and having a capacity of 10 30% by weight of hydrogenated diene polymer KRATON G-1650 (SEBS manufactured by Ciel Chemical Co., Ltd.), 49 parts by weight of styrene, and 12 parts by weight of toluene
0 parts by weight, and tertiary decyl mercaptan 0.1
Charge the mixed solution in parts by weight, raise the temperature while stirring, and
21 parts by weight of acrylonitrile, 0.5 parts by weight of benzoyl peroxide, and 0.1 parts by weight of digyl peroxide were further added, and after the temperature was raised to 80 ° C., the stirring speed was increased to 100 rpm while controlling at 80 ° C. constant. To carry out the polymerization reaction. From the 6th hour after the start of the reversion, it took 1 hour to raise the temperature to 120 ° C., and the reaction was further performed for 2 hours to complete the reaction. The conversion was 97%.

After cooling to 100 ° C., 0.2 parts by weight of 2,2′-methylenebis (4-methyl-6-t-butylphenol) was added. The reaction mixture was extracted from the autoclave, and unreacted monomers and solvent were removed by steam distillation. After distilling off and pulverizing finely, the volatile components were substantially distilled off with a 40 mmφ vent extruder (220 ° C., 700 mmHg vacuum), and the polymer was pelletized. The graft copolymer G shown in Table 1 was obtained. -1 was obtained.

[G-2] G-2 was obtained in the same manner as G-1 except that the hydrogenated diene-based polymer and monomer shown in G-2 in Table 1 were used.

[G-3] G-3 was obtained in the same manner as G-1 except that the hydrogenated diene polymer and monomer shown in G-3 in Table 1 were used.

[G-4] A hydrogenated diene-based polymer KRATON G-1650 (manufactured by Ciel Chemical Co., Ltd.) 10 previously prepared as a homogeneous solution in a stainless steel autoclave having an internal volume of 10 equipped with a paddle-type stirrer.
Parts, 10.8 parts of styrene, 100 parts of toluene, and 0.1 part of t-doesylmercaptan were charged, and the temperature was increased while stirring, and the temperature was increased to 50 ° C.
Then, 79.2 parts of methyl methacrylate and 0.5 part of t-butylperoxyisopropyl carbonate were added. After the inside of the system was replaced with nitrogen, the temperature was further raised to 90 ° C., and at this temperature, the polymerization was continued under stirring at a rotation speed of 100 rpm until the polymerization conversion rate became 74%. The polymerization was stopped when the polymerization conversion reached 74%, and a transparent G-4 was obtained in the same manner as in the following G-1.

[G-5] The hydrogenated diene-based polymer and monomer shown in G-5 of Table 1 were used (AN is mixed with MMA).
In the same manner as in the above, transparent G-5 was obtained.

[G-6] A hydrogenated diene-based polymer and monomer shown in G-6 of Table 1 were used (AN was mixed with MMA), and the others were G-4
In the same manner as in the above, transparent G-5 was obtained.

Antistatic agent used in Table-2 F-1: The proportion of the component having 12 carbon atoms in the total alkyl group is
40% of N, N-bis (hydroxyethyl) alkylamine F-2: The proportion of the component having 12 carbon atoms in the total alkyl group is
60% of N, N-bis (hydroxyethyl) alkylamine F-3: The proportion of the component having 12 carbon atoms in the total alkyl group is
90% N, N-bis (hydroxyethyl) alkylamine F-4: monoester content 93% monoglyceride stearate F-5: polyoxyethylene alkylamine F-6: pentaerythritol stearate F-7: Boric acid ester of stearic acid monoglyceride (manufactured by Daiichi Kogyo Seiyaku Co., Ltd., Register PE139) Examples 1 to 14, Comparative Examples 1 to 6 The blending components shown in Table 2 were blended with a Hensiel mixer. The pellet was formed by an extruder at 230 ° C., and the obtained pellet was formed into a 2.4 mm thick test piece at 230 ° C. by an injection molding machine. The test conditions were as follows: antistatic performance was evaluated by the degree of dust adhesion, and transparency was evaluated by total light transmittance.

 The test method is shown below. The evaluation results are shown in Table-2.

[1] Dust adhesion test method The test piece was left in a room, and the dust adhesion state on the plate surface was visually determined. The evaluation criteria are as shown in the table below.

The test was performed twice, one day and seven days after the test piece was prepared.

[2] Transparency Test Method The tests after 1 day and 7 days after the molding were evaluated based on the rate of change of the total light transmittance based on the case where no antistatic agent was added.

However, Tt (0): Test piece without antistatic agent added Tt (1): Test piece with various antistatic agents added The measuring instrument was Suga Test Instruments Co., Ltd., multi-source light colorimeter, model
Using the _{MSC-1 · GUS · H 2} .

 The evaluation criteria were as shown in the following table based on the magnitude of the change rate.

<Explanation of Examples and Comparative Examples> Examples 1 to 6 are the antistatic resin compositions of claim (1), and the object of the present invention has been obtained. Also,
Examples 7 to 10 are the antistatic resin compositions according to claim (2), and the object of the present invention is obtained without a decrease in transparency.

Comparative Examples 1 and 2 are examples out of the range of the present invention in which no antistatic agent is used, and dust adheres remarkably after 7 days. Further, Comparative Examples 3 to 6 are experiments of adding (system) an antistatic agent other than those obtained in the present invention, and the antistatic ability and the transparency decreased with time, and the object of the present invention was not obtained. .

f. Effect of the Invention The present invention is an excellent antistatic resin composition of a rubber-modified thermoplastic resin, and the appearance of a molded article is beautiful,
A resin excellent in transparency and sharpness can be obtained.

Continuation of the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) C08L 51/04 C08K 5/10 C08K 5/17 C08K 5/55

Claims (2)

(57) [Claims] 1. A method comprising hydrogenating a polymer comprising 50 to 100% by weight of a conjugated diene and 0 to 50% by weight of an aromatic vinyl compound to obtain at least 70% by weight of olefinically unsaturated bonds of the polymer.
Can be copolymerized with 30 to 100% by weight of a monomer (B) composed of an aromatic vinyl compound and / or an alkyl (meth) acrylate in the presence of a hydrogenated diene polymer (A) obtained by hydrogenation of To the rubber-modified thermoplastic resin obtained by graft copolymerization of 0 to 70% by weight of a monomer (C), alkylamine ethoxylate, glyceride and a mono- or a monomer represented by the following general formula (I) One or more compounds selected from borate esters of diglycerides
An antistatic resin composition, which is contained in an amount of 0.05 to 10 parts by weight. General formula (I) _{[(RCOO) m -XO n BOH)} p (R is an alkyl group having 8 to 24 carbon atoms, X is glycerol residue, m is 1 to 2, n is 1 to 3, p is 3 n) 2. The rubber-modified thermoplastic resin has a glass transition temperature of 50 ° C. or higher when converted into a homopolymer in the presence of the hydrogenated diene polymer (A) according to claim 1 (meth). An acrylic acid ester monomer (D) and another vinyl monomer compound (E) copolymerizable with the acrylic acid ester monomer (D) are combined with the refractive index of the hydrogenated diene polymer (A) and the monomer (D). A rubber-modified thermoplastic resin obtained by copolymerization such that the difference between the copolymer and the monomer compound (E) is 0.01 or less.
The antistatic resin composition according to the above.