JPH02263852A - Low lustrous thermoplastic resin composition - Google Patents

Abstract

PURPOSE:To provide a low lustrous thermoplastic resin composition comprising a specific graft copolymer, a specified copolymer having OH groups in the molecule and a specific copolymer having epoxy groups in the molecule. CONSTITUTION:A resin composition comprises (A) a copolymer prepared by graft-copolymerizing A2: 95-20 pts.wt. of one kind or more of monomers selected from aromatic vinyl monomers, cyanated vinyl monomers and unsaturated carboxylic acid alkyl esters monomers to A1: 5-80 pts.wt. of rubbery polymers, (B) a copolymer containing OH group-containing monomer residues in an amount of 0.1-20wt.% and prepared by copolymerizing an aromatic monomer, a cyanated vinyl monomer, an OH group-containing monomer and arbitrarily any other vinylic monomer, and (C) a copolymer containing 0.01-2wt.% of epoxy group- containing monomer residues and prepared by copolymerizing an aromatic monomer, a cyanated vinyl monomer, an epoxy group-containing monomer and arbitrarily any other vinylic monomer, the amounts of the components having 1-98 pts.wt., respectively, and the sum of the amounts being 100 pts.wt.

Description

Detailed Description of the Invention [Industrial Application Field] The present invention relates to a thermoplastic resin composition that has excellent matte properties and surface appearance, and is also excellent in heat resistance. , suitable as exterior parts for household electrical equipment.

[Conventional technology] Demand for thermoplastic resins has been rapidly increasing in recent years due to their characteristics such as lightness, moldability, and electrical insulation properties.
Applications in the field of metal replacement are also expanding significantly.

On the other hand, in fields such as automobile interior parts and household electrical equipment parts, there are safety problems such as blinding,
There is a growing demand for molded products with suppressed surface gloss to give a sense of calm.

Common matting methods include applying texture to the surface of the mold, applying a liquid matting agent to the surface of the molded product, and mixing an inorganic filler with the resin (Japanese Patent Publication No. 49-4458
2), a method of adding a rubbery polymer after polymerization (Japanese Patent Publication No. 48-24034, JP-A-54-14225)
9 and Japanese Patent Publication No. 62-59725), a method of adding a rubber-modified thermoplastic resin (Japanese Patent Publication No. 56-133)
353, JP 59-89346, JP 60-18536, JP 60-202143, and JP 62-101616), three-dimensionalization using crosslinkable monomers A method of adding a resin component (Japanese Unexamined Patent Publication No. 63-63740) is known.

[Problems to be Solved by the Invention] The method of improving the mold surface has problems with expensive mold production costs and compensation management, and a sufficient matting effect cannot be achieved. Furthermore, in the method of painting, the painting process is costly and there is a risk that the resin surface may deteriorate due to the solvent. Mixing an inorganic filler has the disadvantage that the mechanical properties of the resin, especially the impact strength, are greatly reduced, and the appearance of the molded product is poor.

In addition, the method of adding rubbery polymers causes a decrease in heat resistance and rigidity, and the gloss does not disappear uniformly (uneven gloss).
It causes.

The method of adding a rubber-modified thermoplastic resin has problems such as the degree of matting varying depending on molding conditions.

Furthermore, the method of adding a three-dimensional resin component using a crosslinkable monomer has problems such as deterioration of the fluidity of the composition and deterioration of the appearance of the surface of the molded product.

An object of the present invention is to provide a low-gloss thermoplastic resin composition in which the surface gloss of a molded article is reduced and, moreover, has an excellent appearance.

[Means for Solving the Problems] The present inventors have made extensive studies to solve the above problems, and as a result, have arrived at the present invention.

That is, the present invention provides (A) (a) in the presence of 5 to 80 parts by weight of the rubbery polymer (
b) One or more vinyl monomers or monomer mixtures selected from the group consisting of aromatic vinyl monomers, vinyl cyanide monomers, and unsaturated carboxylic acid alkyl ester monomers 95 1 to 98 parts by weight of a graft copolymer obtained by graft polymerizing ~20 parts by weight, (B) an aromatic vinyl monomer, a vinyl cyanide monomer, a monomer having a hydroxyl group in the molecule, and Obtained by polymerizing a monomer mixture to which other copolymerizable vinyl monomers are added as necessary, and the content of monomer residues having hydroxyl groups in the polymer is 0.1 to 20. Copolymer 1 to 9 in weight %
8 parts by weight, and (C) an aromatic vinyl monomer, a vinyl cyanide monomer, a monomer having an epoxy group in the molecule, and other copolymerizable vinyl monomers as necessary. 1 to 98 parts of a copolymer obtained by polymerizing a monomer mixture to which epoxy groups are added, and the content of monomer residues having epoxy groups in the polymer is 0.01 to 2% by weight. , wherein the total amount of (A) to (C) is 1
00 parts by weight of a low gloss thermoplastic resin composition.

As the rubbery polymer (CB') which is a constituent component of the graft copolymer (A) used in the present invention, those having a glass transition temperature of 0°C or less are suitable, and specifically, polybutadiene, polystyrene-butadiene, etc. , diene rubber such as polyacrylonitrile-butadiene, polyisoprene,
Acrylic rubbers such as polychloro, loprene, polybutyl acrylate, and rubbery polymers such as ethylene-propylene-diene monomer ternary electropolymers can be used. Particularly preferred are butadiene or butadiene copolymers.

(b) Examples of aromatic vinyl monomers include styrene, α-
Examples include methylstyrene, vinyltoluene, 0-ethylstyrene, op-dichlorostyrene, and styrene is particularly preferred, and one or more of these can be used.

Examples of vinyl cyanide monomers include acrylonitrile,
Examples include methacrylaterile and ethacrylonitrile, with acrylonitrile being particularly preferred.

Furthermore, as the unsaturated carboxylic acid alkyl ester monomer, acrylic esters and/or methacrylic esters having an alkyl group having 1 to 10 carbon atoms are suitable, and one or more types can be used. Examples of acrylic esters include methyl acrylate, ethyl acrylate, n-propyl acrylate, n-butyl acrylate, t-butyl acrylate, hexyl acrylate, cyclohexyl acrylate, chloromethyl acrylate, and 2-chloroethyl acrylate. Among them, methyl acrylate is particularly preferred.

In addition, methacrylic acid esters include methyl methacrylate, ethyl methacrylate, n-propyl methacrylate, n-butyl methacrylate, t-butyl methacrylate,
hexyl methacrylate, cyclohexyl methacrylate,
Examples include chloromethyl methacrylate and 2-chloroethyl methacrylate, with methyl methacrylate and ethyl methacrylate being particularly preferred.

In addition, the graft copolymer (A) includes 5 to 80 parts by weight of (a) rubbery polymer, preferably 7 to 75 parts by weight, more preferably 10 to 70 parts by weight, and 95 to 20 parts by weight of a monomer mixture. , preferably 93 to 25 parts by weight, more preferably 90 parts by weight
~30 parts by weight can be obtained by a known polymerization method, for example, a method of emulsion graft polymerization by continuously supplying a monomer mixture in the above ratio and a polymerization initiator in the presence of a rubbery polymer latex. can.

If the proportion of the rubbery polymer (a) in the graft copolymer is less than 5 parts by weight, the resulting resin will have poor impact resistance,
If it exceeds parts by weight, the rubbery polymer will have poor dispersion.
It is not practical as it spoils the appearance of the molded product.

(b) an aromatic vinyl monomer in the monomer mixture;
There is no particular restriction on the ratio of vinyl cyanide monomer and unsaturated carboxylic acid alkyl ester monomer, but aromatic vinyl monomer 40 to 90% by weight, vinyl cyanide monomer and The content of the unsaturated carboxylic acid alkyl ester monomer is preferably 60 to 10% by weight.

The aromatic vinyl monomer and vinyl cyanide monomer constituting the copolymer (B) are aromatic vinyl monomers and vinyl cyanide monomers that can be used in the graft copolymer <A). Something similar to the mass can be used.

Examples of monomers having a hydroxyl group in the molecule include compounds that share both a radically polymerizable vinyl group and a hydroxyl group; specific examples include 2-hydroxyethyl acrylate, 2-hydroxypropyl acrylate, and 4-hydroxypropyl acrylate. - (Meth)acrylic acid esters such as hydroxymethylbenzyl, 2-hydroxyethyl methacrylate, 2-hydroxypropyl methacrylate, and 4-hydroxymethylbenzyl methacrylate, 1-hydroxymethyl-4-vinylbenzene, 1-(2 Vinyl aromatics such as -hydroxyethyl)-4-vinylbenzene are examples of compounds with relatively small molecular weights.

On the other hand, as a compound having a relatively large molecular weight, compounds having a polyalkylene oxide group or a derivative thereof, such as compounds of the following formulas (I) and (II), are suitable.

(However, in the formula, R1 represents hydrogen or an alkyl group having 1 to 4 carbon atoms, R2 represents an alkylene group having 2 to 6 carbon atoms, and n represents 2 to 500.) Specific examples include polyethylene glycol acrylate. , polyethylene glycol methacrylate, poly(
propylene oxide) glycol acrylate, poly(
propylene oxide) methacrylate, poly(tetramethylene oxide) glycol acrylate, poly(tetramethylene oxide) glycol methacrylate, poly(hexamethylene oxide) glycol methacrylate, polyethylene glycol acrylamide, polyethylene glycol methacrylamide, poly(propylene oxide) glycol acrylamide, poly Examples include (propylene oxide) glycol methacrylamide, poly(tetramethylene oxide) glycol acrylamide, poly(tetramethylene oxide) glycol methacrylamide, and particularly polyethylene glycol methacrylate and polyethylene glycol methacrylamide are preferably used. These can be used alone or in combination of two or more.

Other copolymerizable vinyl monomers that can be added as necessary include unsaturated carbonic acid alkyl ester monomers that can be used in the graft copolymer (A), acrylamide, methacrylamide, and N-methylacrylamide. ,
(meth)acrylamide monomers such as N,N-dimethylacrylamide, dicarboxylic acid anhydrides such as maleic anhydride and itaconic anhydride, and carboxylic acid vinyl ester monomers such as vinyl acetate, vinyl propionate, and vinyl butyrate. can be mentioned.

The copolymer of the aromatic vinyl monomer in the copolymer (B) resin is preferably 40 to 90% by weight, more preferably 45 to 85% by weight. The copolymerization amount of vinyl cyanide monomer is 6
It is preferably 0 to 10% by weight, more preferably 55 to 15% by weight.

Further, the amount of copolymerization of the monomer having a hydroxyl group in the molecule is 0.
It is preferably 1 to 20% by weight, more preferably 0.2 to 15% by weight.

If the proportion of the aromatic vinyl monomer is less than 40% by weight, moldability is poor, and if it exceeds 90% by weight, the impact resistance and chemical resistance of the resulting resin will decrease, which is not preferable.

Furthermore, if the proportion of the vinyl cyanide monomer is less than 10% by weight, the resulting resin will have poor impact resistance, which is not preferable. Moreover, if it exceeds 60% by weight, the thermal stability of the copolymer will be significantly reduced, resulting in a molded product with poor color tone, which is not preferable.

Furthermore, the proportion of monomers having hydroxyl groups in the molecule is 0.1
If it is less than % by weight, the reduction in surface gloss is insufficient;
If it exceeds 20% by weight, the appearance of the molded product surface will deteriorate significantly;
It is also unfavorable because it has poor moldability.

The aromatic vinyl monomer, vinyl cyanide monomer, and other copolymerizable vinyl monomers that are added as necessary are included in the copolymer (B). Usable aromatic vinyl monomers, vinyl cyanide monomers,
The same copolymerizable vinyl monomers can be used.

Monomers having an epoxy group in the molecule are compounds that share both a radically polymerizable vinyl group and an epoxy group, and specific examples include glycidyl acrylate, glycidyl methacrylate, glycidyl ethacrylate, and glycidyl itaconate. Examples include glycidyl esters of unsaturated organic acids such as, glycidyl ethers such as allyl glycidyl ether, and the above-mentioned derivatives such as 2-methylglycidyl methacrylate. Among them, glycidyl acrylate and glycidyl methacrylate are preferably used. Further, these can be used alone or in combination of two or more.

The copolymerized amount of the aromatic vinyl monomer in the copolymer (C) resin is preferably 40 to 90% by weight, more preferably 45 to 85% by weight. The copolymerization amount of vinyl cyanide monomer is 6
It is preferably 0 to 10% by weight, more preferably 55 to 15% by weight.

Further, the copolymerization amount of the monomer having an epoxy group in the molecule is preferably 0.01 to 2% by weight, particularly preferably 0.03 to 1% by weight.

If the copolymerization m of the aromatic vinyl polymer and vinyl cyanide monomer in the copolymer (C) resin is outside the above range, mechanical properties such as impact resistance may be insufficient. or have insufficient thermal stability, making them impractical.

Copolymerization amount of monomer having epoxy group in molecule is 0.0
When the amount is less than 1% by weight, no effect of reducing gloss due to copolymerization of this monomer appears. Moreover, if it exceeds 2% by weight, the surface appearance of the molded article will deteriorate, which is not preferable.

Furthermore, the amount of monomer residues having an epoxy group in the molecule in the resin composition of the present invention is 10-3 to 0.1% by weight.
is preferable, and 3×10 −3 to 0.1% by weight is more preferable. If it is outside this range, it will not be possible to satisfy both the degree of gloss reduction and the surface appearance, which is not preferable.

There are no particular restrictions on the method for producing copolymers (B) and (C), and commonly known methods such as bulk polymerization, solution polymerization, bulk-suspension polymerization, suspension polymerization, and emulsion polymerization can be used. There are no particular restrictions on the method of charging the copolymer components; they may be charged all at once at the initial stage, or some or all of the monomers may be continuously charged to prevent compositional distribution of the copolymer. Alternatively, polymerization may be carried out while charging in portions.

The composition of the present invention further includes an aromatic vinyl monomer, a vinyl cyanide monomer, a maleimide monomer, and, if necessary, other copolymerizable vinyl monomers. It is preferable to include a copolymer (D) obtained by polymerizing a polymer mixture because heat resistance is improved.

The aromatic vinyl monomer, vinyl cyanide monomer, and other copolymerizable vinyl monomers that are added as necessary for the copolymer (D) include the copolymer (D). B
) The same aromatic vinyl monomers, cyanated vinyl monomers, and other copolymerizable vinyl monomers added as necessary can be used.

Maleimide monomers include maleimide, N-methylmaleimide, N-ethylmaleimide, N-isopropylmaleimide, N-t-butylmaleimide, N-phenylmaleimide, N-m-methylphenylmaleimide, N-
o-methylphenylmaleimide, N-p-methylphenylmaleimide, N-cyclohexylmaleimide, N-0
-Hydroxyphenylmaleimide, N-m-hydroxyphenylmaleimide, N-p-hydroxyphenylmaleimide, N-o-methoxyphenylmaleimide, N-m
-methoxyphenylmaleimide, N-p-methoxyphenylmaleimide, N-chlorophenylmaleimide, N-m-chlorophenylmaleimide, N-p-chlorophenylmaleimide, N-naphthylmaleimide, and the like.

Among these, N-phenylmaleimide, N-cyclohexylmaleimide, N-t-butylmaleimide,
N-isopropylmaleimide and N-m-methylphenylmaleimide are preferred.

These can be used alone or in combination of two or more.

There is no particular restriction on the copolymerization amount of aromatic vinyl monomer and vinyl cyanide monomer in the copolymer (D) resin, but 30 to 90% by weight of aromatic vinyl monomer, cyanide The vinyl monomer content is preferably 10 to 60% by weight. Moreover, the copolymerization amount of the maleimide monomer is preferably 2 to 60% by weight, particularly preferably 5 to 55% by weight.

If the copolymerization amount of the aromatic vinyl monomer, vinyl cyanide monomer, and maleimide monomer is outside the above range, mechanical properties such as impact resistance may be insufficient. It is not practical due to insufficient thermal stability.

There are no particular restrictions on the method for producing the copolymer (D),
Solution polymerization, bulk-suspension polymerization, suspension polymerization, emulsion polymerization, etc.
Generally known methods can be used. There are no particular restrictions on the method of charging the copolymer components; they may be charged all at once at the initial stage, or some or all of the monomers may be continuously charged to prevent the formation of a compositional distribution of the copolymer. Alternatively, polymerization may be carried out while charging in portions.

The resin composition of the present invention has a total amount of (A) to (C) of 100
(A) Graft copolymer 1 to 98 parts by weight, preferably 2 to 90 parts by weight, more preferably 5 to 9 parts by weight
0 parts by weight, and 1 to 98 parts by weight of (B) copolymer, preferably 3 to 50 parts by weight, more preferably 5 to 30 parts by weight,
and (C) copolymer 1 to 98 parts by weight, preferably 3 to 98 parts by weight
It is composed of 50 parts by weight, more preferably 5 to 30 parts by weight. The composition of the present invention further comprises (D) copolymer 0-
It may be blended in an amount of 90 parts by weight, or 0 to 70 parts by weight, more preferably 1 to 65 parts by weight.

If the proportion of (A) is less than 1 part by weight, the impact resistance of the molded article will be low, while if it exceeds 98 parts by weight, a sufficiently low gloss resin will not be obtained. If the proportion of (B) or (C) is less than 1 part by weight, a sufficient low gloss resin cannot be obtained;
If the amount exceeds the weight part, molding processability will be poor and the appearance of the molded product will be impaired.

Furthermore, heat resistance is improved by blending (D),
If it exceeds 90 parts by weight, moldability is poor and impact resistance is poor, which is not preferable.

Furthermore, the rubbery polymer in the resin composition of the present invention is 1
~40% by weight is suitable, and 2-35% by weight is particularly preferred. If the above range is exceeded, impact resistance, rigidity,
This is not preferred because it is difficult to obtain a composition with an excellent balance of thermal stability.

There are no particular limitations on the method for producing the resin composition of the present invention; for example, graft copolymer (A), copolymer (B)
, copolymer (C), and copolymer (D) in the form of pellet powder, repieces, etc., are mixed uniformly using a high-speed stirrer, etc., and then
Various methods can be employed, such as a method of melt-kneading using a single-screw or multi-screw extruder with sufficient mixing capacity.

In addition, graft copolymer (A) and copolymer (B), graft copolymer (A) and copolymer (B), and copolymer (D
), it is also possible to pre-knead two or three of the four components in advance, and then adjust the blending ratio to a predetermined ratio and knead.

The resin composition of the present invention may contain other thermoplastic polymers, such as
Styrene/acrylonitrile copolymer, α-methylstyrene/acrylonitrile copolymer, α-methylstyrene/styrene/acrylonitrile copolymer, styrene/methyl methacrylate/acrylonitrile copolymer, styrene/acrylamide copolymer, polymethacrylic acid By mixing methyl or the like, it is also possible to further improve the balance of melt fluidity, heat resistance, and impact resistance.

For example, when the rubbery polymer concentration in (A) in the graft copolymer is high, a common method is to add one or more of the above copolymers such as styrene/acrylonitrile/methyl methacrylate copolymer. It is.

In addition, depending on the purpose, reinforcing agents and fillers such as pigments and dyes, glass fibers, metal fibers, metal flakes, and carbon fibers, heat stabilizers, antioxidants, ultraviolet absorbers, light stabilizers, lubricants, plasticizers, Antistatic agents, flame retardants, etc. can also be added.

[Examples] In order to explain the present invention more specifically, Examples and Comparative Examples will be described below, but these Examples do not limit the present invention. Here, unless otherwise specified, "parts" represent parts by weight, and "%" represent weight %. In addition, after the finally obtained resin composition was molded by an injection molding method, its resistance was measured by the following test method.

Izot impact strength: ASTM D-256% inch, notched, 23℃ (kg * cm/cm) Heat distortion temperature: ASTM D-648, 1> inch, 18.6 kg/cd load (''C) Surface gloss: Suga Manufactured by Test Instruments, digital bending gloss needle UGV-5D
The surface reflected light of the mirror surface of the molded product was measured at an incident angle of 60 degrees.

Surface appearance: The molded product was visually evaluated.

◎; Very good 0; Good 25μ, gel content 80%)
65 parts of a monomer mixture consisting of 70% styrene and 30% acrylonitrile was emulsion polymerized in the presence of 35 parts (in terms of solid content). The obtained graft copolymer was coagulated with sulfuric acid,
A powdery graft copolymer (A-1) was prepared by neutralizing with caustic soda, washing, filtering, and drying.

A-2: Polybutadiene latex 3 used in A-1
65 parts of a monomer mixture consisting of 65% styrene, 30% acrylonitrile, and 5% methyl methacrylate was emulsion polymerized in the presence of 5 parts (solid content equivalent) and treated in the same manner as A-1 to obtain a powdery graft. A copolymer (A-2) was prepared.

Reference Example 2 (Production of copolymer (B)) B-1: 71% styrene, 24% acrylonitrile, and 5% 2-hydroxyethyl methacrylate were suspension polymerized to produce a bead-shaped copolymer (B-1). was prepared.

B-2: Bead-shaped copolymer (B-2) obtained by suspension polymerization of 68% styrene, 24% acrylonitrile, 4% 2-hydroxyethyl methacrylate, and 4% methyl methacrylate.
was prepared.

B-3: Suspension polymerization of 74% styrene, 25% acrylonitrile, and 1% 2-hydroxypropyl methacrylate,
A bead-shaped copolymer (B-3) was prepared.

B-4: 66% styrene, 22% acrylonitrile, polyethylene glycol methacrylate (molecular weight: n-7
~8) 12% was suspended and polymerized to form a bead-shaped copolymer (B-
4) was prepared.

Reference Example 3 (Production of Copolymer (C)) C-1: 76% styrene, 23% acrylonitrile, and 1% glycidyl acrylate were suspension polymerized to prepare a bead-shaped copolymer (C-1).

C-2 = 69% styrene, 30.5% acrylonitrile
, 0.5% glycidyl methacrylate was subjected to suspension polymerization to prepare a bead-shaped copolymer (C-2).

C-3: 68% styrene, 26.7% acrylonitrile
, 0.3% glycidyl methacrylate, and 5% methyl methacrylate were suspended to form a bead-shaped copolymer (C-3
) was prepared.

C-4: A bead-shaped copolymer (C-4) was prepared by suspension polymerization of 75% styrene and 25% acrylonitrile.

C-5: A bead-shaped copolymer (C-5) was prepared by suspension polymerization of 70% styrene, 25% acrylonitrile, and 5% glycidyl acrylate.

Reference example 4 (manufacture of copolymer (D)) D-1; 50% styrene, 20% acrylonitrile, N
- Suspension polymerize 30% phenylmaleimide to form a copolymer (
D-1) was prepared.

D-2: 30% styrene, 20% α-methylstyrene,
A copolymer (D-2) was prepared by suspension polymerization of 20% acrylonitrile and 30% N-cyclohexylmaleimide.

D-3: 40% styrene, 10% α-methylstyrene,
Acrylonitrile 20%, N-phenylmaleimide 30%
% was subjected to suspension polymerization to prepare a copolymer (D-3).

D-4: 40% styrene, 20% acrylonitrile, N
-35% phenylmaleimide, 5% methyl methacrylate
% was subjected to suspension polymerization to prepare a copolymer (D-4).

Examples 1 to 13, Comparative Examples 1 to 5 Table 1 shows the graft copolymers (A), copolymers (B), copolymers (C), and copolymers (D) prepared in the above reference examples, respectively. The mixture was mixed using a Henschel mixer at the compounding ratio shown in , and then extruded using a 40 mmφ extruder at an extrusion temperature of 270°C to form pellets. Each pellet was then injection molded at a molding temperature of 270°C and a mold temperature of 80°C. Each test piece was prepared and its physical properties were evaluated. These results are shown in Table-1.

The following is clear from the following margin examples and comparative examples. That is, in all of the molded products made of the thermoplastic resin composition obtained according to the present invention, the gloss on the surface of the molded products was uniformly reduced, and the molded products were matted to a high quality. On the other hand, a copolymer (B) containing a hydroxyl group in the molecule was not blended (Comparative Example 1), a copolymer containing an epoxy group in the molecule (
In the case where C) is not blended (Comparative Example 2.3), the surface gloss of the molded product does not decrease, which is not preferable.

In addition, compositions in which the amount of monomer residues having an epoxy group in the molecule exceeds 0.1% by weight (Comparative Example 4)
, and a copolymer (C) with a large amount of copolymerized monomer having an epoxy group in the molecule (Comparative Example 5), although the surface gloss decreased, the surface appearance deteriorated significantly.
It is not possible to obtain a satisfactory molded product.

[Effects of the Invention] The thermoplastic resin composition obtained by the present invention shows a remarkable improvement in surface gloss reduction without impairing the mechanical properties of molded products, and is suitable for use in automobile interior parts and exteriors of household electrical appliances. It is suitable as a molding material for parts, etc., and this effect is exhibited by the graft copolymer (A), the copolymer having a hydroxyl group in the molecule (B), and the copolymer having an epoxy group in the molecule (C).
) in a predetermined ratio.

Claims (1)

[Scope of Claims] (A) (a) In the presence of 5 to 80 parts by weight of a rubbery polymer, (
b) One or more vinyl monomers or monomer mixtures selected from the group consisting of aromatic vinyl monomers, vinyl cyanide monomers, and unsaturated carboxylic acid alkyl ester monomers 95 1 to 98 parts by weight of a graft copolymer obtained by graft polymerizing ~20 parts by weight, (B) an aromatic vinyl monomer, a vinyl cyanide monomer, a monomer having a hydroxyl group in the molecule, and Obtained by polymerizing a monomer mixture to which other copolymerizable vinyl monomers are added as necessary, and the content of monomer residues having hydroxyl groups in the polymer is 0.1 to 20. Copolymer 1 to 9 in weight %
8 parts by weight, and (C) an aromatic vinyl monomer, a vinyl cyanide monomer, a monomer having an epoxy group in the molecule, and other copolymerizable vinyl monomers as necessary. 1 to 98 parts by weight of a copolymer obtained by polymerizing a monomer mixture to which epoxy group is added, and the content of monomer residues having an epoxy group in the polymer is 0.01 to 2% by weight, A composition consisting of a total amount of (A) to (C) of 1
00 parts by weight of a low gloss thermoplastic resin composition.