KR102570571B1 - Thermoplastic resin composition and molded article using the same - Google Patents

Abstract

(A) 15 to 25% by weight of an acrylonitrile-butadiene-styrene graft copolymer; (B) 45 to 65% by weight of an aromatic vinyl-vinyl cyanide copolymer having a weight average molecular weight of 150,000 to 250,000 g/mol; and (C) 0.2 to 0.8 parts by weight of an ethylene-alkyl acrylate copolymer, based on 100 parts by weight of a base resin containing 20 to 30% by weight of a maleimide copolymer; and (E) a thermoplastic resin composition comprising 1 to 3 parts by weight of an ethylene-vinyl acetate copolymer, and a molded article using the same.

Description

Thermoplastic resin composition and molded article using the same {THERMOPLASTIC RESIN COMPOSITION AND MOLDED ARTICLE USING THE SAME}

It relates to a thermoplastic resin composition and a molded article using the same.

Styrene-based resins represented by acrylonitrile-butadiene-styrene copolymer (ABS) resins are widely used in automobiles, home appliances, and OA equipment due to their excellent moldability, mechanical properties, appearance, and secondary processability.

A molded article using a styrenic resin can be widely applied to various products requiring painting/non-painting, and can be applied, for example, to interior/exterior materials for automobiles.

Recently, research/development on thinning, integration, and simplification of interior/exterior materials for automobiles is in progress due to the goal of reducing the weight of vehicles. Among exterior materials for automobiles, for example, in the case of housings for automobile lamps, attempts have been made to thin and integrate the housings for automobile lamps according to the weight reduction target.

In order to satisfy this, the method of using a styrenic resin having high fluidity is effective, but if a base resin with a low molecular weight is used a lot to improve fluidity, the fusion part in the heat fusion process of the housing for an automobile lamp (string) may occur, resulting in poor appearance and a decrease in thermal fusion strength.

Therefore, it is necessary to develop a styrenic resin suitable for a housing for an automobile lamp, which has excellent fluidity and heat resistance, and does not generate silvaries during thermal fusion.

It is intended to provide a high-flow thermoplastic resin composition excellent in both heat resistance and heat-sealing properties, and a molded article using the same.

According to one embodiment, (A) 15 to 25% by weight of an acrylonitrile-butadiene-styrene graft copolymer; (B) 45 to 65% by weight of an aromatic vinyl-vinyl cyanide copolymer having a weight average molecular weight of 150,000 to 250,000 g/mol; and (C) 0.2 to 0.8 parts by weight of an ethylene-alkyl acrylate copolymer, based on 100 parts by weight of a base resin containing 20 to 30% by weight of a maleimide copolymer; and (E) 1 to 3 parts by weight of an ethylene-vinyl acetate copolymer.

The (A) acrylonitrile-butadiene-styrene graft copolymer may have a core-shell structure including a core made of butadiene-based rubbery polymer and a shell formed by graft polymerization of acrylonitrile and styrene to the core. .

The average particle diameter of the rubbery polymer may be 200 to 350 nm.

In the (B) aromatic vinyl-vinyl cyanide copolymer, the aromatic vinyl compound may be selected from the group consisting of styrene unsubstituted or substituted with a halogen or a C1 to C10 alkyl group, α-methyl styrene, and combinations thereof.

In the (B) aromatic vinyl-vinyl cyanide copolymer, the vinyl cyanide compound may be selected from the group consisting of acrylonitrile, methacrylonitrile, fumaronitrile, and combinations thereof.

The (B) aromatic vinyl-vinyl cyanide copolymer may be a copolymer of a monomer mixture including 60 to 80% by weight of an aromatic vinyl compound and 20 to 40% by weight of a vinyl cyanide compound.

The (C) maleimide-based copolymer may be an N-phenyl maleimide-styrene-maleic anhydride copolymer.

40 to 60% by weight of repeating units derived from N-phenyl maleimide may be included based on 100% by weight of the (C) maleimide-based copolymer.

The (C) maleimide-based copolymer may have a glass transition temperature (Tg) of 180 to 200 °C.

The (D) ethylene-alkyl acrylate-based copolymer may include ethylene-methyl acrylate, ethylene-ethyl acrylate, ethylene-butyl acrylate copolymer, or a combination thereof.

The thermoplastic resin composition may further include at least one additive selected from a nucleating agent, a coupling agent, a filler, a plasticizer, a lubricant, a release agent, an antibacterial agent, an antioxidant, a UV stabilizer, an antistatic agent, a pigment, and a dye.

Meanwhile, according to another embodiment, a molded article using the thermoplastic resin composition described above is provided.

The molded article may have a melt flow index of 15 g/10 min or more measured at 220° C. and 10 kg according to ASTM D1238.

The molded article may have a Vicat softening temperature of 120° C. or higher, measured according to ISO 306/B50.

Since the thermoplastic resin composition according to one embodiment and molded articles using the same can exhibit excellent thermal fusion characteristics while having high fluidity and excellent heat resistance, they can be widely applied to molding of various products used by painting and uncoating, for example. For example, it can be usefully applied to applications requiring heat resistance and/or heat sealing properties, such as exterior materials for automobiles, in particular, housings for automobile lamps.

1 and 2 are images showing the thermal fusion evaluation results according to condition 1 (FIG. 1) and condition 2 (FIG. 2) of Example 2,
3 to 4 are images showing thermal fusion evaluation results according to condition 1 (FIG. 3) and condition 2 (FIG. 4) of Comparative Example 1.

Hereinafter, embodiments of the present invention will be described in detail. However, this is presented as an example, and the present invention is not limited thereby, and the present invention is only defined by the appended claims.

In the present invention, unless otherwise specified, the average particle diameter is the volume average diameter, and means the Z-average particle diameter measured using a dynamic light scattering analyzer.

In the present invention, unless otherwise specified, the weight average molecular weight is measured by dissolving a powder sample in tetrahydrofuran (THF) and then using gel permeation chromatography (GPC; Agilent Technologies 1200 series) (column: Shodex Company LF-804, standard sample uses Shodex's polystyrene).

According to one embodiment, (A) 15 to 25% by weight of an acrylonitrile-butadiene-styrene graft copolymer; (B) 45 to 65% by weight of an aromatic vinyl-vinyl cyanide copolymer having a weight average molecular weight of 150,000 to 250,000 g/mol; and (C) 0.2 to 0.8 parts by weight of an ethylene-alkyl acrylate copolymer, based on 100 parts by weight of a base resin containing 20 to 30% by weight of a maleimide copolymer; and (E) 1 to 3 parts by weight of an ethylene-vinyl acetate copolymer.

Hereinafter, each component included in the thermoplastic resin composition will be described in detail.

(A) acrylonitrile-butadiene-styrene copolymer

In one embodiment, (A) the acrylonitrile-butadiene-styrene graft copolymer imparts excellent impact resistance to the thermoplastic resin composition.

In one embodiment, the (A) acrylonitrile-butadiene-styrene graft copolymer has a core made of a butadiene-based rubbery polymer component and a mixture of acrylonitrile and styrene monomers grafted onto the rubbery polymer around the core. It may have a core-shell structure in which a shell is formed by a copolymerization reaction.

The (A) acrylonitrile-butadiene-styrene graft copolymer may be prepared by adding styrene and acrylonitrile to a butadiene-based rubbery polymer and graft copolymerizing it through a conventional polymerization method such as emulsion polymerization or bulk polymerization.

The butadiene-based rubbery polymer core may be included in an amount of 40 to 60 wt% based on 100 wt% of the (A) acrylonitrile-butadiene-styrene graft copolymer. Meanwhile, in the shell, styrene and acrylonitrile may be copolymerized in a weight ratio of 6:4 to 8:2.

The butadiene-based rubbery polymer may be selected from the group consisting of butadiene rubbery polymers, butadiene-styrene rubbery polymers, butadiene-acrylonitrile rubbery polymers, butadiene-acrylate rubbery polymers, and mixtures thereof.

The average particle diameter of the rubbery polymer of the (A) acrylonitrile-butadiene-styrene graft copolymer may be, for example, 200 to 350 nm, for example, 250 to 300 nm. When the above range is satisfied, the thermoplastic resin composition can secure excellent impact resistance and appearance characteristics.

On the other hand, based on 100% by weight of the base resin, the (A) acrylonitrile-butadiene-styrene graft copolymer may be included in 15% by weight or more, for example 17% by weight or more, for example 19% by weight or more , For example, 25% by weight or less, for example 23% by weight or less, for example 21% by weight or less, for example 15 to 25% by weight, for example 17 to 23% by weight, for example 19 to 21% by weight.

If the amount of the (A) acrylonitrile-butadiene-styrene graft copolymer in the thermoplastic resin composition is less than 15% by weight, it is difficult to achieve the intended impact resistance, heat sealing property, etc. of the thermoplastic resin composition, and if it exceeds 25% by weight There exists a possibility that the heat resistance of a thermoplastic resin composition may fall.

(B) Aromatic vinyl-vinyl cyanide copolymer

In one embodiment, (B) the aromatic vinyl-vinyl cyanide copolymer serves to impart excellent fluidity to the thermoplastic resin composition and maintain compatibility between components at a certain level.

In the (B) aromatic vinyl-vinyl cyanide copolymer, the aromatic vinyl compound may be at least one selected from the group consisting of styrene, α-methyl styrene, and combinations thereof unsubstituted or substituted with a halogen or a C1 to C10 alkyl group. there is.

In the (B) aromatic vinyl-vinyl cyanide copolymer, the vinyl cyanide compound may be at least one selected from the group consisting of acrylonitrile, methacrylonitrile, fumaronitrile, and combinations thereof.

The (B) aromatic vinyl-vinyl cyanide copolymer may be a copolymer of a monomer mixture including 60 to 80% by weight of an aromatic vinyl compound and 20 to 40% by weight of a vinyl cyanide compound.

Meanwhile, the (B) aromatic vinyl-vinyl cyanide copolymer may have a weight average molecular weight of 150,000 to 250,000 g/mol, eg 170,000 to 240,000 g/mol, eg 190,000 to 230,000 g/mol. In addition, the (B) aromatic vinyl-vinyl cyanide copolymer may have the above weight average molecular weight range by mixing two or more aromatic vinyl-vinyl cyanide copolymers having different weight average molecular weights.

Based on 100% by weight of the base resin, the (B) aromatic vinyl-vinyl cyanide copolymer may be included at 45% by weight or more, for example, 40% by weight or more, for example, 45% by weight or more, for example, 65% by weight % or less, for example, 45% by weight or less, for example, 45 to 65% by weight, for example, 40 to 50% by weight.

When the amount of the (B) aromatic vinyl-vinyl cyanide copolymer is less than 45% by weight, the fluidity of the thermoplastic resin composition may decrease, and when the amount exceeds 65% by weight, heat resistance of the thermoplastic resin composition may decrease.

(C) maleimide-based copolymer

(C) the maleimide-based copolymer according to one embodiment imparts excellent heat resistance to the thermoplastic resin composition. The (C) maleimide-based copolymer may be prepared by copolymerizing N-phenyl maleimide, styrene, and maleic anhydride, or may be prepared through an imidation reaction of styrene and maleic anhydride copolymer.

In one embodiment, based on 100% by weight of the (C) maleimide-based copolymer, the repeating unit derived from the N-phenyl maleimide is 40 to 60% by weight, for example 40 to 55% by weight, for example 45 to 55% by weight, for example, 45 to 50% by weight.

In the (C) maleimide-based copolymer according to one embodiment, the repeating unit derived from N-phenyl maleimide is 40% by weight If it is less than 60% by weight, it is difficult to express the effect of improving heat resistance by the maleimide-based copolymer, and if it exceeds 60% by weight, there is a concern that the appearance of a molded article using the thermoplastic resin composition will be greatly deteriorated.

The (C) maleimide-based copolymer may have a glass transition temperature (Tg) of, for example, 180 to 200°C, for example, 185 to 195°C.

When preparing the thermoplastic resin composition, the (C) maleimide-based copolymer may be included in an amount of 20% by weight or more, for example, 21% by weight or more, for example, 22% by weight or more, based on 100% by weight of the base resin. 30% by weight or less, for example, 29% by weight or less, for example, 28% by weight or less, for example, 20 to 30% by weight, for example, 22 to 28% by weight.

When the content of the (C) maleimide-based copolymer in the base resin satisfies the above range, heat resistance can be greatly improved while maintaining a balance with other physical properties such as fluidity and impact resistance of the thermoplastic resin composition. A molded article manufactured using it may also exhibit high heat resistance.

(D) ethylene-alkyl acrylate copolymer

(D) ethylene-alkyl acrylate-based copolymer according to one embodiment is a copolymer of ethylene and alkyl acrylate.

In the (D) ethylene-alkyl acrylate-based copolymer, the alkyl may have up to 24 carbon atoms. Examples of the alkyl acrylate include methyl acrylate, ethyl acrylate, n-butyl acrylate, isobutyl acrylate, 2-ethylhexyl acrylate, and n-octyl acrylate.

In one embodiment, the (D) ethylene-alkyl acrylate-based copolymer includes ethylene-methyl acrylate (EMA), ethylene-ethyl acrylate (EEA), ethylene-butyl acrylate (EBA) copolymer, and the like there is.

In one embodiment, the (D) ethylene-alkyl acrylate-based copolymer may have a weight average molecular weight of 100,000 to 400,000 g/mol.

In one embodiment, the (D) ethylene-alkyl acrylate-based copolymer may improve the heat sealing properties of the thermoplastic resin composition together with the ethylene-vinyl acetate copolymer to be described later.

In one embodiment, the (D) ethylene-alkyl acrylate-based copolymer is in a temperature of about 40 ° C. and / or a high humidity of about 95 RH%, which is relatively higher than room temperature and / or normal humidity. It greatly contributes to the improvement of the heat sealing properties of the thermoplastic resin composition.

Specifically, the (D) ethylene-alkyl acrylate-based copolymer prevents the formation of strings by pores that may occur in a high temperature and / or high humidity environment, thereby preventing high temperature and / or high humidity (high temperature and / or high humidity) ) It is possible to improve the heat sealing properties of the thermoplastic resin composition under the environment.

When preparing the thermoplastic resin composition, the (D) ethylene-alkyl acrylate-based copolymer may be included in an amount of 0.2 parts by weight or more, for example, 0.3 parts by weight or more, for example, 0.4 parts by weight or more, based on 100 parts by weight of the base resin. For example, it may be included in 0.8 parts by weight or less, for example 0.7 parts by weight or less, for example 0.6 parts by weight or less, for example 0.2 to 0.8 parts by weight, for example 0.3 to 0.7 parts by weight.

When the content of the (D) ethylene-alkyl acrylate-based copolymer in the thermoplastic resin composition satisfies the above-mentioned range, a molded article using the thermoplastic resin composition may exhibit excellent thermal sealing properties under generally used temperature/humidity conditions.

(E) ethylene-vinyl acetate copolymer

(E) ethylene-vinyl acetate copolymer according to one embodiment contributes to improving the thermal bonding properties of the thermoplastic resin composition by suppressing the formation of sylvari during thermal bonding of the thermoplastic resin composition.

Specifically, the (E) ethylene-vinyl acetate copolymer can improve the fluidity of the thermoplastic resin composition by properly adjusting the melt viscosity at low temperature to room temperature. Therefore, as described above, despite the relatively large weight average molecular weight of the (B) aromatic vinyl-vinyl cyanide copolymer, the (E) ethylene-vinyl acetate copolymer improves the fluidity of the thermoplastic resin composition while thermally splicing of sylvari (string) can be suppressed.

In one embodiment, the (E) ethylene-vinylacetate copolymer is not particularly limited, and those commonly used in the art may be used.

In the (E) ethylene-vinyl acetate copolymer, the weight ratio of each of the ethylene and vinyl acetate is not particularly limited, but, for example, based on 100% by weight of the ethylene-vinyl acetate copolymer, repeating units derived from vinyl acetate It may be included in 10 to 20% by weight.

When preparing the thermoplastic resin composition, the (E) ethylene-vinyl acetate copolymer may be included in an amount of 1 part by weight or more, for example, 1.5 parts by weight or more, for example, 3 parts by weight or less, for example, based on 100 parts by weight of the base resin. For example, it may be included in 2.5 parts by weight or less, for example, 1 to 3 parts by weight, for example, 1.5 to 2.5 parts by weight.

When the amount of the (E) ethylene-vinyl acetate copolymer in the thermoplastic resin composition is less than 1 part by weight, there is a risk of silvariation occurring during thermal fusion of the thermoplastic resin composition, and when it exceeds 3 parts by weight, the fusion strength and heat resistance of the thermoplastic resin composition are lowered There is a possibility that the molded product may be peeled off during injection molding.

(F) other additives

In addition to the components (A) to (E), the thermoplastic resin composition according to an embodiment is used to balance each physical property under the condition of maintaining excellent fluidity, heat resistance, and heat-sealing properties, or of the thermoplastic resin composition. It may further include one or more additives required depending on the end use.

Specifically, as the additives, nucleating agents, coupling agents, fillers, plasticizers, lubricants, release agents, antibacterial agents, antioxidants, UV stabilizers, antistatic agents, pigments, dyes, etc. may be used, and these may be used alone or in combination of two or more. there is.

These additives may be appropriately included within a range that does not impair the physical properties of the thermoplastic resin composition, and specifically, may be included in an amount of 20 parts by weight or less based on 100 parts by weight of the base resin, but is not limited thereto.

The thermoplastic resin composition according to the present invention can be prepared by a known method for preparing a thermoplastic resin composition.

For example, the thermoplastic resin composition according to the present invention may be prepared in the form of pellets by simultaneously mixing the components of the present invention and other additives and then melt-kneading them in an extruder.

A molded article according to one embodiment of the present invention may be prepared from the thermoplastic resin composition described above.

In one embodiment, the molded article has a melt-flow index of 15 g / 10 min or more, for example, 15.5 g / 10 min or more, for example, 16 g/10 min or more.

In one embodiment, the molded article may have a Vicat softening temperature of 120° C. or higher as measured according to ISO 306/B50.

Since the thermoplastic resin composition satisfies high fluidity and high heat resistance properties and exhibits excellent heat-sealing properties at the same time, it can be widely applied to the molding of various products used in painting and uncoating, for example, exterior materials for automobiles, in particular, automobiles. Lamp housings, more specifically automotive head lamp housings and/or rear lamp housings, require heat resistance and thermal bonding with other plastic materials such as polymethyl methacrylate (PMMA) resin. It can be usefully applied to the intended use.

Hereinafter, the present invention will be described in more detail through Examples and Comparative Examples, but the following Examples and Comparative Examples are for the purpose of explanation and are not intended to limit the present invention.

Example 1, Example 2 and Comparative Examples 1 to 3

The thermoplastic resin compositions of Examples 1 and 2 and Comparative Examples 1 to 3 were prepared according to the component content ratios shown in Table 1 below.

In Table 1, (A), (B), (B'), and (C) are included in the base resin and are expressed in weight% based on the total weight of the base resin, and (D), (E), and ( E′) is added to the base resin and is expressed in parts by weight based on 100 parts by weight of the base resin.

The components listed in Table 1 were dry mixed and quantitatively and continuously introduced into the feed section of a twin screw extruder (L/D = 36, φ = 45 mm) to melt/knead. Then, after drying the pelletized thermoplastic resin composition through a twin-screw extruder at about 80 ° C. for about 4 hours, a specimen for physical property evaluation was prepared using a 6 oz injection molding machine with a cylinder temperature of about 240 to 250 ° C and a mold temperature of about 60 ° C. did

division Example 1 Example 2 Comparative Example 1 Comparative Example 2 Comparative Example 3 base resin (A) 19 19 19 19 19 (B) 55 55 - 56 55 (B') - - 54 - - (C) 26 26 27 25 26 (D) 0.5 0.5 0 0.5 0 (E) 1.5 2.5 0 0 2.5 (E') 0 0 0 1.5 0

A description of each component described in Table 1 is as follows.

(A) acrylonitrile-butadiene-styrene graft copolymer

It includes 58% by weight of a core made of butadiene rubbery polymer having an average particle diameter of 260 nm, and the shell grafted to the core is an acrylonitrile-butadiene-styrene graft in which styrene and acrylonitrile are grafted at a weight ratio of 7.5: 2.5 Polymer (Lotte Advanced Materials)

(B) Aromatic vinyl-vinyl cyanide copolymer

A styrene-acrylonitrile copolymer with a weight average molecular weight of about 210,000 g/mol obtained by copolymerizing a monomer mixture composed of 73% by weight of styrene and 27% by weight of acrylonitrile (Lotte Advanced Materials)

(B') Aromatic vinyl-vinyl cyanide copolymer

A styrene-acrylonitrile copolymer with a weight average molecular weight of about 90,000 g/mol obtained by copolymerizing a monomer mixture consisting of 75% by weight of styrene and 25% by weight of acrylonitrile (Lotte Advanced Materials)

(C) maleimide-based copolymer

N-phenyl maleimide-styrene-maleic anhydride copolymer (Denka, MS-NJ) having 50% by weight of repeating units derived from N-phenyl maleimide and having a glass transition temperature (Tg) of about 185 ° C.

(D) ethylene-alkyl acrylate copolymer

Ethylene-methyl acrylate copolymer (DuPont, Elvaloy AC1330)

(E) ethylene-vinyl acetate copolymer

Ethylene-vinyl acetate copolymer containing about 15% by weight of repeating units derived from vinyl acetate (Hanwha Total Petrochemical, E153F)

(E') Olefin Wax

High Density Polyethylene Wax (Mitsui Petrochem, HI-WAX 400P)

Experimental example

The experimental results are shown in Table 2 below.

(1) Heat resistance (° C.): Vicat softening temperature (VST) was measured according to ISO 306/B50.

(2) Flowability (g/10min): The melt-flow index (MI) was measured under the condition of 220° C. and 10 kg according to ASTM D1238.

(3) Thermal welding properties: Specimens of 40 mm x 50 mm x 3.2 mm (width x length x height) are treated under the following two conditions, respectively.

Condition 1 (room temperature/humidity conditions): left for 2 hours under conditions of a temperature of about 23°C and a humidity of 50 RH%.

Condition 2 (humidification condition): temperature of about 40 ° C, humidity of 95 RH% condition for 24 hours.

Thereafter, a 450 mm x 300 mm x 1 mm (width x length x height) Teflon film is placed on a hot plate, each specimen treated under the above two conditions is brought into contact with the Teflon film, and then the heater The temperature was raised to about 250° C. and maintained for about 30 seconds.

Thereafter, the degree of occurrence of strings and pores on the surface of the specimen in contact with the Teflon film was classified according to the following criteria.

○: Silvari is not observed, and the generated stomata are also insignificant.

△: Some silvaries are observed, and there are many stomata.

X: Significantly observed both sylvari and developed stomata

Meanwhile, images of specimens used to evaluate thermal welding properties according to Examples and Comparative Examples are shown in FIGS. 1 to 4, respectively.

1 and 2 are images showing thermal fusion evaluation results according to condition 1 (FIG. 1) and condition 2 (FIG. 2) of Example 2, and FIGS. 3 and 4 are condition 1 (FIG. 3) of Comparative Example 1. , This is an image showing the thermal fusion evaluation result according to condition 2 (FIG. 4).

division Example 1 Example 2 Comparative Example 1 Comparative Example 2 Comparative Example 3 VST
(℃) 120 121 122 121 120 MI
(g/10min) 16.0 16.5 17.5 18.5 17.5 Thermal welding properties condition 1 ○ ○ X △ ○ condition 2 △ ○ X X △

From Tables 1 to 2 and FIGS. 1 to 4, as in Examples 1 to 2, acrylonitrile-butadiene-styrene graft copolymer, aromatic vinyl-vinyl cyanide copolymer, maleimide copolymer, ethylene -By using an alkyl acrylate-based copolymer and an ethylene-vinyl acetate copolymer in optimal amounts, it is possible to provide a high-flow thermoplastic resin composition with excellent heat resistance and heat-sealing properties compared to comparative examples and a molded article using the same You can check.

Although the present invention has been described through preferred embodiments as described above, the present invention is not limited thereto and various modifications and variations are possible without departing from the concept and scope of the claims described below. Those working in the technical field to which the invention belongs will readily understand.

Claims (14)

(A) 15 to 25% by weight of an acrylonitrile-butadiene-styrene graft copolymer;
(B) 45 to 65% by weight of an aromatic vinyl-vinyl cyanide copolymer having a weight average molecular weight of 150,000 to 250,000 g/mol; and
(C) 20 to 30% by weight of a maleimide-based copolymer;
Regarding 100 parts by weight of the base resin containing,
(D) 0.2 to 0.8 parts by weight of an ethylene-alkyl acrylate copolymer; and
(E) 1.5 to 2.5 parts by weight of an ethylene-vinyl acetate copolymer;
As a molded article made from a thermoplastic resin composition comprising,
The Vicat softening temperature measured according to ISO 306 / B50 is 120 ° C or higher,
A molded article having a melt flow index of 15 g/10min or more measured at 220°C and 10 kg according to ASTM D1238. In paragraph 1,
The (A) acrylonitrile-butadiene-styrene graft copolymer
A core made of a butadiene-based rubbery polymer, and
A molded article having a core-shell structure including a shell formed by graft polymerization of acrylonitrile and styrene to the core. In paragraph 2,
The average particle diameter of the rubbery polymer is 200 to 350 nm, the molded article. In paragraph 1,
In the (B) aromatic vinyl-vinyl cyanide copolymer, the aromatic vinyl compound is selected from the group consisting of styrene unsubstituted or substituted with a halogen or a C1 to C10 alkyl group, α-methyl styrene, and combinations thereof. In paragraph 1,
In the (B) aromatic vinyl-vinyl cyanide copolymer, the vinyl cyanide compound is selected from the group consisting of acrylonitrile, methacrylonitrile, fumaronitrile, and combinations thereof. In paragraph 1,
The (B) aromatic vinyl-vinyl cyanide copolymer is 60 to 80% by weight of an aromatic vinyl compound and a monomer mixture comprising 20 to 40% by weight of a vinyl cyanide compound. In paragraph 1,
The (C) maleimide-based copolymer is an N-phenyl maleimide-styrene-maleic anhydride copolymer. In paragraph 7,
A molded article comprising 40 to 60% by weight of repeating units derived from N-phenyl maleimide based on 100% by weight of the (C) maleimide-based copolymer. In paragraph 1,
The (C) maleimide-based copolymer has a glass transition temperature (Tg) of 180 to 200 ° C., a molded article. In paragraph 1,
The (D) ethylene-alkyl acrylate-based copolymer includes ethylene-methyl acrylate, ethylene-ethyl acrylate, ethylene-butyl acrylate copolymer, or a combination thereof, molding. In paragraph 1,
The thermoplastic resin composition further comprises at least one additive selected from a nucleating agent, a coupling agent, a filler, a plasticizer, a lubricant, a release agent, an antibacterial agent, an antioxidant, an ultraviolet stabilizer, an antistatic agent, a pigment, and a dye.

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