KR101263985B1

KR101263985B1 - Thermoplastic resin composition having good heat resistant coloring property

Info

Publication number: KR101263985B1
Application number: KR1020100012880A
Authority: KR
Inventors: 반형민; 최정수; 유근훈; 이원석; 장석구
Original assignee: 주식회사 엘지화학
Priority date: 2010-02-11
Filing date: 2010-02-11
Publication date: 2013-05-13
Also published as: KR20110093066A

Abstract

The present invention relates to a thermoplastic resin composition, and more specifically, (A) rubber-modified styrene-based graft copolymer resin; And (B) 0.3 to 3 parts by weight of ethylene bis stearamide (EBS) and (D) Hydroxy carboxylic acid (0.005) based on 100 parts by weight of a styrene-based thermoplastic resin formed from (B) a styrene copolymer resin. It relates to a thermoplastic resin composition excellent in heat-coloring resistance, characterized in that it comprises ~ 0.05 parts by weight.
According to the present invention, a thermoplastic resin having good transparency and color sharpness can be provided, and in particular, a thermoplastic resin having excellent heat coloring property can be provided.

Description

Thermoplastic resin composition excellent in heat-coloring resistance {THERMOPLASTIC RESIN COMPOSITION HAVING GOOD HEAT RESISTANT COLORING PROPERTY}

The present invention relates to a thermoplastic resin composition, and more particularly, to transparency, color clarity and heat resistance of a styrene-based thermoplastic resin by including lubricating ethylene bis stearamide (EBS) and a heat stability enhancer (hydroxyhydric carboxylic acid). The present invention relates to a thermoplastic resin composition having improved colorability.

Transparent thermoplastic resins, particularly acrylonitrile-butadiene-styrene resins (hereinafter referred to as " ABS thermoplastic resins ") are widely used as OA articles and home appliances as materials having excellent transparency and processability. In recent years, since these products are being enlarged, it is difficult to obtain sufficient processability with the melting characteristics of the current transparent ABS resin. Therefore, a method of using a large amount of additives to increase the processability of the resin or increasing the processing temperature has been mainly proposed.

However, when the injection of the transparent ABS resin at a high temperature for a long time, there is a problem that deteriorates the surface sharpness of the transparent resin, such as generating a mold precipitate due to the generation of gas due to decomposition of the resin.

Japanese Laid-Open Patent Publication No. 2001-81271 discloses a transparent thermoplastic resin having excellent transparency and moldability, and Japanese Laid-Open Patent Publication No. 2005-263902 also has a thermoplastic resin having excellent transparency by adding an ultraviolet absorber and a specific phosphorus compound. Although it discloses about the all, the technique of the said reference has the problem that the surface sharpness of a transparent resin falls when injecting at high temperature for a long time.

In order to solve the problems of the prior art as described above, the present invention is a thermoplastic having a more economical and excellent heat coloration, color clarity and transparency by adding together a lubricating EBS and a hydroxy carboxylic acid as a heat stability enhancer to a styrene-based thermoplastic resin It aims at providing a resin composition and its molded object.

For the purposes as described above, the present invention

(A) rubber modified styrene graft copolymer resin; And

(B) Styrene-based copolymer resin; with respect to 100 parts by weight of the styrene-based thermoplastic resin formed

(C) 0.3 to 3 parts by weight of ethylene bis stearamide (EBS) and

(D) Hydroxy carboxylic acid (Hydroxy carboxylic acid) Provides a thermoplastic resin composition excellent in heat colorability, characterized in that it comprises 0.005 to 0.05 parts by weight.

Moreover, this invention provides the molded object manufactured from the said thermoplastic resin composition.

According to the present invention, even if a small amount of an expensive thermal stability reinforcing agent is applied, it is possible to provide a thermoplastic resin having excellent color clarity and transparency in a more economical manner and not discoloring even at high temperatures.

The present invention provides a thermoplastic resin composition and its molded product comprising adding ethylene bis stearamide (EBS) and a hydroxy carboxylic acid (Hydroxy carboxylic acid) as a heat stabilizer to a styrene thermoplastic resin.

In one embodiment of the present invention

(A) rubber modified styrene graft copolymer resin; And

(C) 0.3 to 3 parts by weight of ethylene bis stearamide (EBS) and

The content of the rubber-modified styrene graft copolymer resin is 20 to 80 parts by weight, the content of the styrene copolymer resin is preferably 20 to 80 parts by weight.

Here, the content of the rubber-modified styrene graft copolymer resin is preferably 20 to 80 parts by weight. If the content is less than 20 parts by weight, there is a problem that the impact strength is lowered, if more than 80 parts by weight there is a problem that the transparency is lowered.

In addition, the content of the styrene copolymer resin is preferably 20 to 80 parts by weight. This is because when the content is less than 20 parts by weight, there is a problem that the workability is lowered, and when the content is more than 80 parts by weight, transparency is lowered.

The rubber-modified styrene-based graft copolymer resin is a styrene-based transparent resin prepared by graft copolymerization of a monomer mixture of a methacrylic acid alkyl ester or an acrylic acid alkyl ester compound, an aromatic vinyl compound, and a vinyl cyan compound on a diene rubber.

Here, the diene rubber is polybutadiene, butadiene-styrene copolymer, polyisoprene, butadiene-acrylonitrile copolymer, isobutylene-isoprene copolymer, ethylene-propylene rubber, acrylic rubber, urethane rubber, silicone rubber or these A mixture of is preferred, but not limited thereto.

In addition, the rubber-modified styrene graft copolymer resin (A) is 8 to 50% by weight of the diene rubber (a1), 3 to 25% by weight of the aromatic vinyl compound (a2), 0.5 to 15% by weight of the vinyl cyan compound (a3) % And methacrylic acid alkyl ester or acrylic acid alkyl ester (a4) 10 to 88.5% by weight is preferable.

Here, the diene rubber is preferably used in 8 to 50% by weight. If the content is less than 8% by weight, there is a problem that the impact strength is lowered, and if the content is more than 50% by weight there is a problem that the transparency is lowered.

The aromatic vinyl compound is preferably used in 3 to 25% by weight. If the content is less than 3% by weight, there is a problem in not obtaining sufficient processability, and if it is more than 25% by weight, there is a problem in that transparency is lowered. The aromatic vinyl compound is preferably, but not limited to, styrene, α-methylstyrene, o-ethylstyrene, p-ethylstyrene, halogen and alkyl substituted styrene or mixtures thereof.

The vinyl cyan compound is preferably used in 0.5 to 15% by weight. If the content is less than 0.5% by weight, there is a problem that the impact strength is lowered, and when the content is more than 15% by weight, there is a problem of discoloring the color of the resin. The vinyl cyan compound is preferably acrylonitrile, methacrylonitrile, ethacrylonitrile or a mixture thereof, but is not limited thereto.

The methacrylic acid alkyl ester or acrylic acid alkyl ester compound is preferably used at 10 to 88.5% by weight. If the content is less than 10% by weight, there is a problem of lowering transparency, and if it is more than 88.5% by weight, there is a problem of lowering the impact strength. As methacrylic acid alkyl ester or acrylic acid alkyl ester, methyl methacrylate (methylmethacrylate), methyl acrylate (methylacrylate) or a mixture thereof is preferable, but is not limited thereto.

In addition, the styrene copolymer resin (B) is an aromatic vinyl compound (b1) 7 to 55% by weight, vinyl cyan compound (b2) 3 to 25% by weight and methacrylic acid alkyl ester or acrylic acid alkyl ester (b3) 20 ~ It is preferred to include 90% by weight.

Here, the aromatic vinyl compound is preferably used in 7 to 55% by weight. If the content is less than 7% by weight there is a problem that does not obtain sufficient processability, if the content is more than 55% by weight there is a problem that the transparency is lowered. The aromatic vinyl compound is preferably, but not limited to, styrene, α-methylstyrene, o-ethylstyrene, p-ethylstyrene, halogen and alkyl substituted styrene or mixtures thereof.

The vinyl cyan compound is preferably used in 3 to 25% by weight. If the content is less than 3% by weight, there is a problem that the impact strength is lowered, and when the content is more than 25% by weight, there is a problem of discoloring the color of the resin. The vinyl cyan compound is preferably acrylonitrile, methacrylonitrile, ethacrylonitrile or a mixture thereof, but is not limited thereto.

The methacrylic acid alkyl ester or acrylic acid alkyl ester compound is preferably used in 20 to 90% by weight. If the content is less than 20% by weight, there is a problem of lowering transparency, and if it is more than 90% by weight, there is a problem of lowering impact strength. As methacrylic acid alkyl ester or acrylic acid alkyl ester, methyl methacrylate (methylmethacrylate), methyl acrylate (methylacrylate) or a mixture thereof is preferable, but is not limited thereto.

The lubricant is preferably ethylene bis stearamide (EBS).

In addition, the hydroxyl carboxylic acid (C) is hydroxypaphan-1,2,3-tricarboxylic acid (Hydroxypaopane-1,2,3-tricarboxylic acid (citric acid), 1-hydroxypaphan-1 , 2,3-tricarboxylic acid (1-Hydroxypaopane-1,2,3-tricarboxylic acid; isocitric acid), 2,2-bis (hydroxymethyl) butyric acid (2,2-Bis (hydroxymethyl) butyric acid; dimethylolbutanoic acid), hydroxy (diphenyl) acetic acid (α, α-diphenylglycolic acid), 2,4-hydroxyphenylacetic acid (2,4- Hydroxyphenylacetic acid (p-hydroxyphenylacetic acid), 4-hydroxyphenylacetic acid (4-Hydroxyphenylacetic acid), DL-hydroxybutanedioic acid (DL-Hydroxybutanedioic acid (malic acid), α-hydroxyphenylacetic acid (α-Hydroxyphenylacetic acid; mandelic acid), 2,3-dihydroxybutanedioic acid (tartaric acid), 2-hydroxybenzoic acid (salicylic acid) and 3-hydroxy Roxy-2 It is preferably at least one selected from the group consisting of -phenyl propionic acid (3-Hydroxy-2-phenylpropionic acid; tropic acid).

At this time, the melting point of the hydroxide carboxylic acid is preferably 100 ~ 180 ℃.

The introduction amount of the EBS and the hydroxide carboxylic acid preferably includes 0.3 to 3.0 parts by weight and 0.005 to 0.05 parts by weight based on 100 parts by weight of the styrene-based thermoplastic resin. If the content of the EBS is less than 0.3 parts by weight, there is a problem that can not be obtained sufficient processability, if it is more than 3.0 parts by weight there is a problem of lowering the transparency, when the content of hydroxide carboxylic acid is less than 0.005 parts by weight to obtain sufficient thermal stability This is because there is a problem that can not be, and if there is more than 0.05 parts by weight there is a problem that worsens the thermal stability.

In addition, the thermoplastic resin composition may further include one or more selected from the group consisting of UV absorbers, antioxidants, light stabilizers, dyes, and pigments.

That is, the thermoplastic resin composition of the present invention may further include additives such as known ultraviolet absorbers, antioxidants, light stabilizers, dyes, and pigments as necessary.

In addition, in another embodiment of the present invention

Provided is a molded article made of the thermoplastic resin composition.

Here, the completed thermoplastic resin composition may provide a molded article having excellent transparency and color clarity by extrusion molding, injection molding, extrusion-blow molding, etc. which are commonly used. .

Hereinafter, preferred examples are provided to aid the understanding of the present invention, but the following examples are merely to illustrate the present invention, and the scope of the present invention is not limited to the following examples.

Preparation Example 1 Preparation of Rubber-Modified Styrene-Based Graft Copolymer Resin (I)

50 parts by weight of polybutadiene rubber latex, 100 parts by weight of ion-exchanged water, 1.0 part by weight of sodium oleate emulsifier, 35 parts by weight of methyl methacrylate, 12 parts by weight of styrene, 3 parts by weight of acrylonitrile, and tertiary dodecyl mercaptan 0.5 Parts by weight, 0.048 parts by weight of sodium pyrophosphate, 0.012 parts by weight of dextrose, 0.001 parts by weight of ferrous sulfide, and 0.04 parts by weight of cumene hydroperoxide were continuously administered at 75 ° C. for 5 hours and reacted. After the reaction, the temperature was raised to 80 ° C., and aged for 1 hour to complete the reaction to obtain latex. At this time, the polymerization conversion rate was 99.8%, and the solid coagulation content was 0.1%. The latex was coagulated with an aqueous calcium chloride solution, washed, and graft copolymer powder was obtained. The refractive index of the obtained graft copolymer was 1.518.

Preparation Example 2 Preparation of Styrene Copolymer Resin (II)

63.4 parts by weight of methyl methacrylate, 24.6 parts by weight of styrene, and 12 parts by weight of acrylonitrile were mixed with 30 parts by weight of toluene as a solvent and 0.15 parts by weight of differential dodecyl mercaptan as a molecular weight regulator so that the average reaction time was 3 hours. Continuously added to the reactor to maintain the reaction temperature at 150 ℃. The polymer solution discharged from the reactor was heated in a preheating bath, the unreacted monomer was volatilized in the volatilization tank, and the temperature of the polymer was maintained at 210 ° C., so that the copolymer resin was processed into pellets using a polymer transfer pump extrusion machine. The final refractive index of the obtained styrene copolymer resin was 1.518.

Example 1

30 parts by weight of the rubber-modified styrene-based graft copolymer resin (I) and 70 parts by weight of the styrene-based copolymer resin (II), 0.3 parts by weight of ethylene bis stearamide (EBS) and carboxylic acid hydroxy acid (TA). (Tartaric acid) After mixing 0.02 parts by weight, melt kneading at 190 ~ 220 ℃ by a 40 ° single screw extruder to prepare a pellet, and then to produce a specimen by injection, it is shown in Table 1 to measure the physical properties.

Example 2

30 parts by weight of the rubber-modified styrene-based graft copolymer resin (I) and 70 parts by weight of the styrene-based copolymer resin (II), 0.3 parts by weight of ethylene bis stearamide (EBS) and carboxylic acid hydroxy acid (TA). (Tartaric acid) After mixing 0.05 parts by weight, melt kneading at 190 ~ 220 ℃ by a 40 ° single screw extruder to prepare a pellet, and then to produce a specimen by injection, it is shown in Table 1 to measure the physical properties.

Example 3

30 parts by weight of the rubber-modified styrene-based graft copolymer resin (I) and 70 parts by weight of the styrene-based copolymer resin (II), 0.3 parts by weight of ethylene bis stearamide (EBS), and carboxylic acid (CA) as hydroxides. (Citric acid) After mixing 0.02 parts by weight, melt kneading at 190 ~ 220 ℃ by a 40 ° single screw extruder to prepare a pellet, and then to produce a specimen by injection, it is shown in Table 1 to measure the physical properties.

Example 4

30 parts by weight of the rubber-modified styrene-based graft copolymer resin (I) and 70 parts by weight of the styrene-based copolymer resin (II) prepared by using 0.3 parts by weight of ethylene bis stearamide (EBS) and carboxylic acid hydroxide. (Malic acid) After mixing 0.02 parts by weight, melt kneading at 190 ~ 220 ℃ by a 40 ° single screw extruder to prepare a pellet, and then to produce a specimen by injection, it is shown in Table 1 to measure the physical properties.

Example 5

30 parts by weight of the rubber-modified styrene graft copolymer resin (I) prepared above and 70 parts by weight of the styrene copolymer resin (II), 0.3 parts by weight of ethylene bis stearamide (EBS) and HPAA as carboxylic acid hydroxide (p-Hydroxyphenylacetic acid) After mixing 0.02 parts by weight, melt kneading at 190 ~ 220 ℃ by a 40 ° single screw extruder to prepare a pellet, and then to produce a specimen by injection, it is shown in Table 1 to measure the physical properties.

Example 6

Based on 30 parts by weight of the rubber-modified styrene graft copolymer resin (I) prepared above and 70 parts by weight of styrene copolymer resin (II), 0.3 parts by weight of ethylene bis stearamide (EBS) and carboxylic acid hydroxide were used as SA. (Salicylic acid) After mixing 0.02 parts by weight, melt kneading at 190 ~ 220 ℃ by 40 ° single screw extruder to prepare a pellet, and then injection molded to produce a specimen, measured in the physical properties are shown in Table 1 below.

Comparative Example 1

After mixing 30 parts by weight of the rubber-modified styrenic graft copolymer resin (I) prepared above and 0.3 parts by weight of ethylene bis stearamide (EBS) based on 70 parts by weight of the styrene copolymer resin (II), 40 ° Melt kneading at 190 ~ 220 ℃ by a single screw extruder to produce a pellet, and then injection molded to produce a specimen, measured in physical properties are shown in Table 1 below.

Comparative Example 2

30 parts by weight of the rubber-modified styrene-based graft copolymer resin (I) and 70 parts by weight of the styrene-based copolymer resin (II), 0.3 parts by weight of ethylene bis stearamide (EBS) and carboxylic acid hydroxy acid (TA). (Tartaric acid) After mixing 0.001 parts by weight, melt kneading at 190 ~ 220 ℃ by a 40 ° single screw extruder to prepare a pellet, and then to produce a specimen by injection, it is shown in Table 1 to measure the physical properties.

Comparative Example 3

30 parts by weight of the rubber-modified styrene-based graft copolymer resin (I) and 70 parts by weight of the styrene-based copolymer resin (II), 0.3 parts by weight of ethylene bis stearamide (EBS) and carboxylic acid hydroxy acid (TA). (Tartaric acid) After mixing 0.1 parts by weight, melt kneading at 190 ~ 220 ℃ with a 40 ° single screw extruder to prepare a pellet, and then to produce a specimen by injection, it is shown in Table 1 to measure the physical properties.

Comparative Example 4

30 parts by weight of the rubber-modified styrene-based graft copolymer resin (I) and 70 parts by weight of the styrene-based copolymer resin (II), 0.3 parts by weight of ethylene bis stearamide (EBS) and carboxylic acid hydroxide, After mixing 0.05 parts by weight of GA (Gallic acid) having a high point at 250 ° C., melt kneading at 190-220 ° C. with a 40 ° single screw extruder to produce pellets, and injecting the specimen to measure the physical properties thereof. Shown in

Comparative Example 5

30 parts by weight of the rubber-modified styrene graft copolymer resin (I) prepared above and 70 parts by weight of the styrene copolymer resin (II), 4.0 parts by weight of ethylene bis stearamide (EBS), and TTA as carboxylic acid hydroxide. (Tartaric acid) After mixing 0.02 parts by weight, melt kneading at 190 ~ 220 ℃ by a 40 ° single screw extruder to prepare a pellet, and then to produce a specimen by injection, it is shown in Table 1 to measure the physical properties.

division EBS Hydroxide carboxylic acid Properties content
(Parts by weight) Kinds content
(Parts by weight) transparency(%) Color Sharpness (L) Heat colorability (ΔE) Example 1

0.3 TTA 0.02 1.8 95.4 2.7 Example 2 TTA 0.05 1.9 95.6 2.5 Example 3 CA 0.02 1.8 94.9 3.1 Example 4 MA 0.02 2.0 95.1 3.0 Example 5 HPAA 0.02 2.1 95.2 2.8 Example 6 SA 0.02 1.9 95.0 3.2 Comparative Example 1 0.3 - - 1.8 95.3 4.5 Comparative Example 2 0.3 TTA 0.001 1.8 95.2 4.6 Comparative Example 3 0.3 TTA 0.1 2.2 90.4 4.9 Comparative Example 4 0.3 GA 0.05 2.2 93.4 4.3 Comparative Example 5 4.0 TTA 0.02 3.5 92.1 7.5

* Transparency (Haze): Measured according to ASTM D1003. The smaller the value of the transparency, the more transparent.

Color clarity (L): Table 1 shows the L value measured using Hunter Lab's Color Quest II. The color clarity L may have a value of 0 to 100, the closer to 0, the blacker, and the closer to 100, the whiter. Accordingly, the closer the value of the color sharpness L to 100, the greater the color sharpness.

* Heat-resistant colorability (ΔE): After injection for 15 minutes at 250 ℃ in an injection molding machine to obtain an injection molded product, the ΔE value with the molded article not retained by using Hunter Color's Color Quest II calculated by the following equation (1) Compared.

In the above formula 1, the subscript 2 represents the injection molded article after staying in the injection molding machine, and the subscript 1 represents a molded article not remaining.

In Equation 1, L, a, and b denote values of a coordinate axis representing intrinsic colors, respectively, and L may have a value of 0 to 100, and the closer to 0, the blacker the color, and the closer to 100, the white color. Indicates. a may have a positive value and a negative value with respect to 0, which means that a color larger than 0 is red, and a color smaller than 0 is green. b may have a positive number and a negative number based on 0, which means that a color larger than 0 is yellow, and a color smaller than 0 is blue.

Accordingly, the smaller the value of the heat-coloring property (ΔE), the less the heat discoloration during the injection stay, indicating that the heat-coloring property is excellent.

It was found that the thermoplastic resin compositions of Examples 1 to 6 were transparent and were excellent in color sharpness and heat resistance colorability.

On the other hand, Comparative Example 1, which does not use the hydroxide carboxylic acid, the transparency is 1.8%, the color sharpness is 95.3, the heat colorability is 4.5, so that the thermoplastic resin composition is transparent and excellent color sharpness, but the heat colorability It was found to be low.

In Comparative Example 2, the hydroxide carboxylic acid was used in an amount less than the allowable range of the present invention, and the transparent resin composition is transparent and excellent in color sharpness because the transparency is 1.8%, the color sharpness is 95.2, and the heat colorability is 4.6. However, it turned out that heat resistance colorability is inferior.

Comparative Example 3 is used as a content exceeding the allowable range of the carboxylic acid of the present invention, the transparency is 2.2%, the color sharpness is 90.4, heat resistance colorability is 4.9, but the thermoplastic resin composition is transparent, but the color sharpness and heat resistance It was found that the colorability was low.

Comparative Example 4 is a hydroxyl carboxylic acid using a GA (Gallic acid; mp 250 ℃) that exceeds the allowable range of the melting point of the present invention, the transparency is 2.2%, the color sharpness is 93.4, and the heat colorability is 4.3 Although the thermoplastic resin composition was transparent, it turned out that color vividness and heat resistance colorability are inferior.

Comparative Example 5 is used as the content of the lubricant EBS (ethylene bis stearamide) beyond the allowable range of the present invention, the transparency is 3.5%, the color clarity is 92.1, the heat-resistant colorability is 7.5, so that the thermoplastic resin composition transparency and color It was found that the sharpness was low and the heat resistance colorability was very low.

The foregoing description is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be interpreted by the following claims, and all technical ideas falling within the scope of the present invention should be construed as being included in the scope of the present invention.

Claims

(A) Rubber-modified butadiene rubber styrene graft copolymer resin containing 0.5 to 15 wt% of vinyl cyan compound (a3) and 10 to 88.5 wt% of methacrylic acid alkyl ester or acrylic acid alkyl ester (a4) ; And
(B) Styrene-based copolymer resin; with respect to 100 parts by weight of the styrene-based thermoplastic resin formed
(C) 0.3 to 3 parts by weight of ethylene bis stearamide (EBS) and
(D) A thermoplastic resin composition having excellent heat coloring resistance, comprising 0.005 to 0.05 parts by weight of a hydroxy carboxylic acid having a melting point of 100 to 180 ° C.

The method of claim 1, wherein the hydroxide carboxylic acid (C) is hydroxypaopane-1,2,3-tricarboxylic acid (Hydroxypaopane-1,2,3-tricarboxylic acid (citric acid), 1-hydroxy Phapan-1,2,3-tricarboxylic acid (1-Hydroxypaopane-1,2,3-tricarboxylic acid; isocitric acid), 2,2-bis (hydroxymethyl) butyric acid (2,2- Bis (hydroxymethyl) butyric acid; dimethylolbutanoic acid), hydroxy (diphenyl) acetic acid (α, α-diphenylglycolic acid), 2,4-hydroxyphenylacetic acid ( 2,4-Hydroxyphenylacetic acid; p-hydroxyphenylacetic acid), 4-hydroxyphenylacetic acid, 4-hydroxybutanedioic acid (DL-Hydroxybutanedioic acid; malic acid), α-hydroxy Hydroxyphenylacetic acid (α-Hydroxyphenylacetic acid; mandelic acid), 2,3-dihydroxybutanedioic acid (2,3-dihydroxybutanedioic acid; tartaric acid), 2-hydroxybenzoic acid (2-Hydroxybenzoic acid; salicylic acid) And 3-ha De-hydroxy-2-phenyl-propionic acid (3-Hydroxy-2-phenylpropionic acid; tropic acid) to heat coloring resistance are excellent thermoplastic resin composition, characterized in that at least one member selected from the group consisting of.

delete

According to claim 1, wherein the rubber-modified styrene-based graft copolymer resin content is 20 to 80 parts by weight, the content of the styrene-based copolymer resin is 20 to 80 parts by weight of thermoplastic resin excellent heat resistance Composition.

The method of claim 1,
The rubber-modified styrene-based graft copolymer resin (A) is 0.5 to 15% by weight of the vinyl cyan compound (a3) 8 to 50% by weight of the diene rubber (a1), and 3 to 25% by weight of the aromatic vinyl compound (a2) A thermoplastic resin composition having excellent heat coloring resistance, comprising%.

The method of claim 1,
The styrene-based copolymer resin (B) is 7 to 55% by weight of an aromatic vinyl compound (b1), 3 to 25% by weight of a vinyl cyan compound (b2) and 20 to 90 weight of an alkyl methacrylate or an alkyl acrylate (b3). A thermoplastic resin composition having excellent heat coloring resistance, comprising%.

The method of claim 1,
The thermoplastic resin composition further comprises at least one member selected from the group consisting of ultraviolet absorbers, antioxidants, light stabilizers, dyes, and pigments.

A molded article made of the thermoplastic resin composition according to any one of claims 1 to 2 and 4 to 7.