JPH0515743B2 - - Google Patents

Description

[Detailed description of the invention]

<Industrial Application Field> The present invention relates to a thermoplastic resin composition having excellent impact resistance, moldability, chemical resistance, and surface appearance. <Prior Art> Acrylonitrile-butadiene-styrene copolymer resin (ABS resin) has excellent impact resistance and moldability, and is widely used as a general-purpose thermoplastic resin. However, it does not have sufficient chemical resistance or heat resistance, and its use is restricted under severe conditions. In addition, aromatic polyester resin (hereinafter abbreviated as polyester) has excellent mechanical properties, electrical properties, chemical resistance, heat resistance, low moisture resistance, processability, etc., and is widely used as an engineering plastic. However, it has the disadvantage of poor impact resistance. To improve the impact resistance of polyester
Blends with ABS resin have been proposed (for example, JP-A-49-97081, JP-A-56-14549, JP-A-57-117556, JP-A-57-137350, Publication No. 60-36558, JP-A-60-
123550, etc.). Blends of polyesters and graft copolymers obtained by graft copolymerizing α,β-unsaturated dicarboxylic acid anhydrides or unsaturated carbonamides with other monomers onto rubber-like polymers have also been proposed (for example, JP-A-49-97081, JP-A-59-
138256, JP 60-144349, JP
60-262847, JP-A-61-130366, etc.). Furthermore, a method of adding an epoxy resin to a mixture of polyester and diene polymer has also been proposed (Japanese Patent Laid-Open No. 149951/1983). <Problems to be solved by the invention> However, no composition that is fully satisfactory in terms of total balance of compatibility, mechanical properties, fluidity, etc. has been obtained by the methods generally proposed so far. . For example, a simple blend of ABS resin and polyester has poor compatibility and extremely low mechanical properties. In addition, in the case of a blend of polyester and a graft copolymer obtained by graft copolymerizing a monomer having a functional group reactive or affinity with polyester together with other monomers onto a rubber-like polymer, the impact resistance is Although it can be improved, it is impractical because the compatibility is poor and the surface condition of the molded product is poor. Furthermore, when an epoxy resin is added to a mixture of polyester and diene polymer, the epoxy resin is localized and hardened, resulting in essentially poor fluidity. Therefore, the object of the present invention is to obtain a resin composition that has the chemical resistance, heat resistance, and surface appearance of polyester without impairing the moldability of ABS resin, and has impact resistance higher than that of ABS resin. shall be. <Means for Solving the Problems> The present inventors have conducted intensive studies to solve the above problems, and as a result, have arrived at the present invention. That is, the present invention includes: (A) ABS resin 1 to 98 parts by weight (B) Aromatic polyester resin 1 to 98 parts by weight (C) (a) Aromatic vinyl 50 to 90% by weight (b) Vinyl cyanide 9 to 98 parts by weight 50% by weight (c) α,β-unsaturated carboxylic acid metal salt and α,β-unsaturated carboxylic acid having the following relationship:
0.1~20wt%x/(x+y)x100=5~100
% (where x and y are α,
β-unsaturated carboxylic acid metal salts and α,β-
The percentage by weight of unsaturated carboxylic acid is indicated. ), and the total amount of (A), (B) and (C) is 1 to 70 parts by weight.
100 parts by weight of a thermoplastic resin composition. The present invention will be explained in detail below. The ABS resin (A) used in the present invention includes diene rubber (a), vinyl cyanide monomer (b), aromatic vinyl monomer (c), and if necessary, other copolymerizable monomers. A resin composition consisting of a graft copolymer in which the entire amount of the monomer is graft copolymerized with the diene rubber (i), and a copolymer in which the remaining monomer is copolymerized. be. Examples of the diene rubber (a) used in the present invention include polybutadiene rubber, acrylonitrile-butadiene copolymer rubber, styrene-butadiene copolymer rubber, polyisoprene rubber, etc., and these may be used alone or in combination of two or more. can do. In the present invention, polybutadiene and/or styrene-butadiene copolymer rubber is preferably used. Examples of vinyl cyanide (b) include acrylonitrile, methacrylonitrile, and the like, with acrylonitrile being particularly preferred. Examples of the aromatic vinyl (c) include styrene, α-methylstyrene, p-methylstyrene, and pt-butylstyrene. Among them, styrene and/or α-methylstyrene are preferably used. Other copolymerizable monomers (d) include methyl methacrylate, ethyl methacrylate, methacrylic acid-t-
α, such as butyl, cyclohexyl methacrylate, glycidyl acrylate, glycidyl methacrylate, etc.
β-unsaturated carboxylic acid esters, αβ-unsaturated dicarboxylic anhydrides such as maleic anhydride and itaconic anhydride, α, β such as N-phenylmaleimide, N-methylmaleimide, N-t-butylmaleimide, etc. - Imide compounds of unsaturated dicarboxylic acids, etc. can be mentioned. There is no particular restriction on the composition ratio of ABS resin (A), but from the viewpoint of moldability and impact resistance of the resulting thermoplastic resin composition, diene rubber (A) is It is preferably 5 to 85 parts by weight, more preferably 15 to 75 parts by weight. Also,
Similarly, vinyl cyanide (b) is preferably 5 to 50 parts by weight, particularly 7 to 45 parts by weight, and more preferably 8 to 40 parts by weight. The aromatic vinyl (c) is preferably 10 to 90 parts by weight, particularly preferably 13 to 83 parts by weight, and more preferably 17 to 77 parts by weight.
It can be preferably used within a range of parts by weight. In addition, diene rubber in all thermoplastic resin compositions
The content of (a) is preferably in the range of 1 to 60% by weight, particularly 3 to 55% by weight, more preferably 5 to 50% by weight.
It is preferable that it is in the range of . Furthermore, if the weight of the diene rubber in the resin composition is 15% by weight or more, especially 15% or more,
If it is 25% by weight, the impact resistance of the resin composition will be dramatically improved compared to that of the graft copolymer composition and the aromatic polyester resin alone. In this case, particularly significant effects occur when polybutylene terephthalate is selected as the aromatic polyester. There are no particular limitations on the method for producing the ABS resin (A), and commonly known methods such as bulk polymerization, solution polymerization, bulk suspension polymerization, suspension polymerization, and emulsion polymerization are used. It is also possible to obtain the above compositions by blending separately (graft) copolymerized resins. The aromatic polyester (B) used in the present invention is a polyester having an aromatic ring in the chain unit of the polymer,
It is a polymer or copolymer obtained by a polycondensation reaction containing an aromatic dicarboxylic acid (or its ester-forming derivative) as a main component. The aromatic dicarboxylic acids mentioned here include terephthalic acid, isophthalic acid, orthophthalic acid, 1,
5-naphthalene dicarboxylic acid, 2,5-naphthalene dicarboxylic acid, 2,6-naphthalene dicarboxylic acid, 2,2'-biphenyldicarboxylic acid, 3,3'-
Biphenyldicarboxylic acid, 4,4'-biphenyldicarboxylic acid, 4,4'-diphenyl etherdicarboxylic acid, 4,4'-diphenylmethanedicarboxylic acid, 4,4'-diphenylsulfondicarboxylic acid, 4 , 4'-diphenylisopropylidene dicarboxylic acid, 1,2-bis(phenoxy)ethane-
4,4'-dicarboxylic acid, 2,5-anthracenedicarboxylic acid, 2,6-anthracenedicarboxylic acid, 4,4'-p-terphenylenedicarboxylic acid,
Examples include 2,5-pyridinedicarboxylic acid,
Terephthalic acid can be preferably used. Two or more of these aromatic dicarboxylic acids may be used in combination. In addition, if the amount is small, one or more types of aliphatic dicarboxylic acids such as adipic acid, azelaic acid, dodecanedioic acid, and sebacic acid, and alicyclic dicarboxylic acids such as cyclohexanedicarboxylic acid may be used in combination with these aromatic dicarboxylic acids. can do. In addition, as diol components, ethylene glycol, propylene glycol, butylene glycol, hexylene glycol, neopentyl glycol, 2-methyl-1,3-propanediol,
Examples include aliphatic diols such as diethylene glycol and triethylene glycol, alicyclic diols such as 1,4-cyclohexane dimethonol, and mixtures thereof. In addition, if it is a small amount, a long chain diol with a molecular weight of 400 to 6000, i.e.
One or more types of polyethine glycol, poly-1,3-propylene glycol, polytetramethylene glycol, etc. may be copolymerized. Specific aromatic polyesters include polyethylene terephthalate, polypropylene terephthalate, polybutylene terephthalate, polyethylene Phthalate, polybutylene naphthalate, polyethylene-1,2-bis(phenoxy)ethane-4,4'-dicarboxylate, etc., as well as polyethylene isophthalate/terephthalate, polybutylene terephthalate/isophthalate, polybutylene terephthalate/decane dicarboxylate, etc. Among these, which include copolymerized polyesters such as carboxylates, polybutylene terephthalate and polyethylene terephthalate can be preferably used. The aromatic polyester used in the present invention is
It is preferable that the relative viscosity of a 0.5% o-chlorophenol solution measured at 25° C. is 1.15 to 3.0, particularly 13 to 2.5. If the relative viscosity is less than 1.15, the resulting molded product will have low impact strength, and if it is greater than 3.0, the surface of the molded product will have poor gloss, which is not preferred. The modified vinyl polymer (C) (hereinafter referred to as copolymer (C)) used in the present invention is (a) Aromatic vinyl 50 to 90% by weight (b) Vinyl cyanide 9 to 50% by weight (c) α,β-unsaturated carboxylic acid metal salt and α,β-unsaturated carboxylic acid having the following relationship:
0.1 to 20% by weight x/(x+y)×100 = 5 to 100% (where x and y are α, β of the copolymer
- indicates the weight percent of unsaturated carboxylic acid metal salts and α,β-unsaturated carboxylic acids. ) is a modified vinyl polymer made by copolymerizing monomers consisting of: Examples of the aromatic vinyl (a) include styrene, α-methylstyrene, p-methylstyrene, and pt-butylstyrene. Among them, styrene and α-methylstyrene are preferred. Examples of vinyl cyanide (b) include acrylonitrile and methacrylonitrile. Among them, acrylonitrile is preferred. The α,β-unsaturated carboxylic acid metal salt and α,β-unsaturated carboxylic acid (c) in the monomer mixture (C) include acrylic acid, methacrylic acid, ethacrylic acid,
Examples include maleic acid, fumaric acid, itaconic acid, crotonic acid, cinnamic acid, and metal salts thereof. Among them, acrylic acid, methacrylic acid, and metal salts thereof are preferred. Moreover, two or more of these can be used in combination. Metal species include IA, IB, and IA in the periodic table of elements.
A, B, group A and group 4 metals such as Na, K, Cu, Mg, Ca, Ba, Zn,
Examples include Cd, Al, Fe, Co, and Ni, among which Na, K, Mg, Ca, Ba, and Zn are preferred. The α,β-unsaturated carboxylic acid metal salt in the copolymer (C) may be introduced by directly polymerizing the α,β-unsaturated carboxylic acid metal salt, or the aromatic vinyl, After polymerizing a copolymer consisting of vinyl cyanide and α,β-unsaturated carboxylic acid, a neutralization reaction is performed in an organic solvent or in an extruder, or
Or aromatic vinyl, vinyl cyanide, α,
It may be introduced by polymerizing a copolymer consisting of a β-unsaturated carboxylic acid ester and then carrying out a saponification reaction in an organic solvent or in an extruder. The neutralization reaction or saponification reaction is carried out using basic compounds of the metals listed above, such as sodium hydroxide,
Hydroxides such as potassium hydroxide, magnesium hydroxide, calcium hydroxide, barium hydroxide, zinc hydroxide, alkoxides such as sodium methoxide, sodium ethoxide, magnesium ethoxide, and sodium oxide, potassium oxide,
This can be carried out using oxides such as magnesium oxide and zinc oxide. The amount of these basic compounds added can be arbitrarily selected depending on the amount of the desired α,β-unsaturated carboxylic acid metal salt in the copolymer. As the organic solvent used in the neutralization reaction, aliphatic alcohols, aromatic hydrocarbons, halogenated hydrocarbons, ketones, etc. can be used alone or in any combination. It is also possible to copolymerize 0 to 70 parts by weight of other copolymerizable monomers with respect to 100 parts by weight of the monomers (a), (b), and (c). Other copolymerizable monomers include methyl methacrylate, ethyl methacrylate, methacrylic acid-t
α, β-unsaturated carboxylic acid esters such as butyl, cyclohexyl methacrylate, glycidyl acrylate, glycidyl methacrylate, α, β-unsaturated dicarboxylic acid anhydrides such as maleic anhydride, itaconic anhydride, N- phenylmaleimide,
Examples include imide compounds of α,β-unsaturated dicarboxylic acids such as N-methylmaleimide and Nt-butylmaleimide. α,β-unsaturated carboxylic acid metal salts and α,β
- The proportion of unsaturated carboxylic acid has the following relationship: x/(x+y)×100=5 to 100%, where x and y are the weight percentages in each copolymer. In the copolymer (C) composed of the above copolymer components, α, β-unsaturated carboxylic acid metal salt and α,
The copolymerization amount occupied by β-unsaturated carboxylic acid (c) is preferably 0.1 to 28% by weight, more preferably 0.2 to 10% by weight.
% by weight. When the copolymerization amount is less than 0.1% by weight, the impact strength of the composition is low, and when it exceeds 28% by weight, the copolymer tends to gel, making it impossible to obtain a molded article with a good surface condition. There are no particular limitations on the method for producing the copolymer (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 (a), (b), and (c), and they may be charged all at once at the initial stage. Polymerization may be carried out while part or all of the mixture is continuously or dividedly charged. In the thermoplastic resin composition of the present invention, the blending ratio of ABS resin (A), polyester (B) and copolymer (C) is 1 to 98 parts by weight, preferably 2 to 92 parts by weight, particularly preferably (B) is 5 to 90 parts by weight, (B) is 98 to 1 part by weight, preferably 94 to 2 parts by weight, particularly preferably
90 to 5 parts by weight, and (C) is 1 to 70 parts by weight, preferably 2 to 65 parts by weight, particularly preferably 5 to 60 parts by weight, and the total amount of (A), (B) and (C) is 100 parts by weight. If (A) is less than 1 part by weight and (B) is more than 98 parts by weight, if (C) is less than 1 part by weight, the resulting resin composition will have poor impact resistance; If the amount exceeds 1 part by weight (B), the chemical resistance and mold transferability will be poor, and if the amount (C) exceeds 70 parts by weight, the molding processability will be poor, which is not preferable. The ratio of α,β-unsaturated carboxylic acid metal salt and α,β-unsaturated carboxylic acid in copolymer (C) is when x and y are the weight percent of each copolymer,
If x/(x+y)×100<5%, the surface appearance of the molded product will be poor, which is not preferable. There are no particular limitations on the method for producing the thermoplastic resin composition of the present invention, and generally known methods can be employed. That is, after uniformly mixing ABS resin (A), polyester (B), and copolymer (C) in the form of pellet powder or small pieces using high-speed stirring, etc., Various methods can be employed, such as melt-kneading using an extruder. In addition, ABS resin (A) and polyester (B), polyester (B) and copolymer (C), ABS resin (A) and copolymer (C), etc. are pre-kneaded in advance.
It is also possible to adjust the blending ratio to a predetermined ratio and knead afterwards. In addition to ABS resin (A), polyester (B), and copolymer (C), the thermoplastic resin composition of the present invention may optionally contain polystyrene (PS), styrene/acrylonitrile copolymer (SAN), and polyester. Methyl methacrylate (PMMA), styrene/methyl methacrylate/
Acrylonitrile copolymer, α-methylstyrene/acrylonitrile copolymer α-methylstyrene/styrene/acrylonitrile copolymer, α-
Vinyl polymers such as methylstyrene/methyl methacrylate/acrylonitrile copolymer, p-methylstyrene/acrylonitrile copolymer, styrene/N-phenylmaleimide copolymer, methacrylic acid-butadiene-styrene terpolymer ( MBS) resin, AES resin, AAS resin, polycarbonate, polycaproamide (nylon 6), polyhexamethylene adipamide (nylon 66), and other thermoplastic resins may be mixed as appropriate, or polyethylene,
Polypropylene, ethylene/propylene copolymer, ethylene/butene-1 copolymer, ethylene/
Propylene/dicyclopentadiene copolymer, ethylene/propylene/5-ethylidene-2-norbornene copolymer, ethylene/propylene/1,
By appropriately mixing polyolefin rubbers such as 4-hexadiene copolymer, ethylene/vinyl acetate copolymer, and ethylene/butyl acrylate copolymer, it is also possible to adjust the physical properties and characteristics to more desirable ones. . Depending on the purpose, pigments, dyes, glass fibers, metal fibers, metal flakes,
Reinforcing materials and fillers such as carbon fibers, heat stabilizers, antioxidants, ultraviolet absorbers, light stabilizers, lubricants, plasticizers, antistatic agents, flame retardants, and the like can be added. <Examples> The present invention will be explained in more detail below using Examples and Comparative Examples. Impact resistance rating: 1/
2" Izot impact strength was measured in accordance with ASTM D256-56. As an evaluation of moldability, the melt viscosity was measured using a high-performance flow tester at a resin temperature of 250 to 280.
Measured under the conditions of temperature and load of 50 kg. As an evaluation of heat resistance, the Vikato softening temperature was measured according to ASTM D-1525. Chemical resistance was determined by immersing an injection-molded square plate in methanol and gasoline at 23°C for 24 hours and visually observing the surface of the square plate. The surface appearance was determined by measuring the glossiness of the surface of the molded product. Note that the following parts and percentages represent parts by weight and percentages by weight, respectively. Reference Example 1 ABS resins A-1 to A-3 were manufactured according to the following formulations. A-1: Polybutadiene latex (rubber particle size
0.25μ, gel content 80%) 70% styrene, 30% acrylonitrile in the presence of 60 parts (solids equivalent)
40 parts of a monomer mixture consisting of the following were subjected to emulsion polymerization. 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: After emulsion polymerization of 60 parts of a monomer mixture consisting of 15% methyl methacrylate, 65% styrene, and 20% acrylonitrile in the presence of 40 parts (solid content equivalent) of the polybutadiene latex used in A-1. , A-1 was prepared to prepare a powdery graft copolymer (A-2). A-3: Polybutadiene rubber (“Diene” NF35A
(manufactured by Asahi Kasei Corporation) was dissolved in 70 parts of styrene and 10 parts of acrylonitrile, followed by bulk polymerization to prepare a graft copolymer (A-3). Reference Example 2 Modified vinyl copolymer C-1~
C-7 and vinyl copolymer C-8 were prepared. C-1: 70 parts of styrene, 24 parts of acrylonitrile,
A bead-shaped modified vinyl copolymer (C'-1) was prepared by suspension polymerization of 6 parts of methacrylic acid.
Subsequently, 4 parts of a 50% aqueous sodium hydroxide solution was added to 100 parts of this copolymer, and the mixture was extruded at a temperature of 220°C to form a copolymer (C-1).
was prepared. The ratio of α,β-unsaturated carboxylic acid metal salt (sodium methacrylate) determined by acid determination is the ratio of α,β-unsaturated carboxylic acid metal salt (sodium methacrylate) and
It is 85.1% of the total amount of unsaturated carboxylic acid (methacrylic acid), and α,
The proportions of β-unsaturated carboxylic acid metal salt (sodium methacrylate) and α,β-unsaturated carboxylic acid (methacrylic acid) were 5.07% and 1.88%, respectively. C-2: 20 parts of methyl methacrylate, 65 parts of styrene
After carrying out suspension polymerization of a monomer mixture consisting of 15 parts of acrylonitrile and 15 parts of acrylonitrile, a bead-shaped copolymer (C'-2) was obtained in the same manner as C-2. Subsequently, 15 parts of a 50% aqueous sodium hydroxide solution was added to 100 parts of this copolymer, and the mixture was extruded at a temperature of 220°C to prepare a copolymer (C-2). The proportions of each component in the copolymer determined by IR measurement, NMR measurement, and acid calibration are 2.4/64.1/14.8/18.7 for methyl methacrylate, stingle, acrylonitrile, and sodium methacrylate.
The weight ratio was . C-3: 58 parts of styrene, 15 parts of α-methylstyrene
1 part, 25 parts of acrylonitrile, and 2 parts of magnesium acrylate were subjected to bulk polymerization to prepare a bead-shaped modified vinyl copolymer (C-3). C-4: 58 parts of styrene, 15 parts of α-methylstyrene
1 part, 25 parts of asrylonitrile, 1 part of magnesium acrylate, and 1 part of acrylic acid,
A bead-shaped modified vinyl copolymer (C-4) was prepared. C-5: 58 parts of styrene, 15 parts of α-methylstyrene
A bead-shaped modified vinyl copolymer (C-
5) was prepared. C-6: After suspension polymerization of a monomer mixture consisting of 95 parts of styrene and 5 parts of methacrylic acid, a bead-shaped copolymer (C'-6) was obtained in the same manner as C-2. Subsequently, a concentration of 50% was added to 100 parts of this copolymer.
% sodium hydroxide aqueous solution, extrusion was carried out at a temperature of 220°C to obtain a copolymer (C
-6) was prepared. α, β determined by acid calibration
- The ratio of unsaturated carboxylic acid metal salt (sodium methacrylate) is α, β-unsaturated carboxylic acid metal salt (sodium methacrylate) and α,
It is 65.5% of the total amount of β-unsaturated carboxylic acid (methacrylic acid), and α,β-unsaturated carboxylic acid metal salt (sodium methacrylate) and α,β-unsaturated carboxylic acid (sodium methacrylate) in the copolymer. methacrylic acid) is 3.75% each.
and 1.97%. C-7: 72 parts of styrene, 24 parts of acrylonitrile,
A bead-shaped modified birylic copolymer (C-7) was prepared by suspension polymerization of 4 parts of methacrylic acid. C-8: A bead-shaped modified vinyl copolymer (C-8) was prepared by suspension polymerization of 76 parts of styrene and 24 parts of acrylonitrile. Examples 1 to 8 A-1 to A-3 manufactured in Reference Example 1 and Reference Example 2
C-1 to C-5 produced in the above and PBT-1200L (polybutylene terphthalate manufactured by Toray Industries, Inc.) as a polyester were mixed in a Henschel mixer at the mixing ratio shown in Table 1, and then using a 40 mmφ extruder, After extruding at an extrusion temperature of 250℃ and pelletizing each pellet, the molding temperature was 250℃ for each pellet.
Each test piece was prepared by injection molding at a mold temperature of 60°C, and its physical properties were evaluated.
These results are shown in Table-1. Comparative Examples 1 to 5 A-1 to A-3 manufactured in Reference Example 1, Reference Example 2
C-1 to C-8 produced in the above and PBT-1200L (polybutylene terphthalate manufactured by Toray Industries, Inc.) as a polyester were mixed in a Henschel mixer at the mixing ratio shown in Table 1, and then mixed in a 40 mmφ extruder. After extruding at an extrusion temperature of 250℃ and pelletizing each pellet, the molding temperature was 250℃ and
Each test piece was prepared by injection molding at a mold temperature of 60°C, and its physical properties were evaluated.
These results are also shown in Table-1.

[Table] Examples 9 to 16 Except for using PET-J-135 (polyethylene terephthalate manufactured by Mitsui PET Resin Co., Ltd.) as the polyester, the extrusion temperature was 280°C, the molding temperature was 280°C, and the mold temperature was 80°C. , under the same conditions as in Examples 1-8. The blending ratio and measurement results of physical properties are shown in Table-2. Comparative Examples 6 to 10 Comparative examples except that PET-J-155 (polyethylene terephthalate manufactured by Mitsui PETJIN Co., Ltd.) was used as the polyester, the extrusion temperature was 280°C, the molding temperature was 280°C, and the mold temperature was 80°C. Tests 1 to 5 were conducted under the same conditions. The blending ratio and measurement results of physical properties are also shown in Table-2.

[Table] The following is clear from the Examples and Comparative Examples. That is, the products obtained according to the present invention are excellent in impact resistance, moldability, heat resistance, chemical resistance, and surface appearance. On the other hand, α, β−
A vinyl copolymer (C-8) that does not contain an unsaturated carboxylic acid metal salt and an α,β-unsaturated carboxylic acid as a copolymerization component has poor impact resistance, and a modified vinyl copolymer that does not contain vinyl cyanide (C-6) has insufficient impact resistance, high melt viscosity, and poor moldability. <Effects of the invention> The thermoplastic resin composition of the invention includes ABS resin (A),
Polyester (B) and a specific modified vinyl copolymer (C) containing an α,β-unsaturated carboxylic acid metal salt and an α,β-unsaturated carboxylic acid are blended in a specific ratio. The compatibility of (A) and (B) is extremely good due to the presence of the α,β-unsaturated carboxylic acid metal salt and the α,β-unsaturated carboxylic acid. In addition, the thermoplastic resin composition of the present invention has moldability and impact resistance equivalent to that of ABS resin, and heat resistance and chemical resistance of polyester, so it can be used in various molded products that take advantage of these properties. can.

Claims (1)

[Claims] 1 (A) ABS resin 1 to 98 parts by weight (B) Aromatic polyester resin 1 to 98 parts by weight (C) (a) Aromatic vinyl 50 to 90 parts by weight (b) Vinyl cyanide 9 ~50% by weight (c) α,β-unsaturated carboxylic acid metal salt and α,β-unsaturated carboxylic acid having the relationship of the following formula
0.1~20wt%x/(x+y)x100=5~100
% (where x and y are α,
β-unsaturated carboxylic acid metal salts and α,β-
The percentage by weight of unsaturated carboxylic acid is indicated. ), and the total amount of (A), (B) and (C) is 1 to 70 parts by weight.
100 parts by weight of a thermoplastic resin composition.