WO2014163255A1 - Thermoplastic resin composition and moulded article having outstanding antistatic properties - Google Patents

Abstract

The antistatic thermoplastic resin composition according to the present invention comprises a base resin consisting of (A) between 30 and 95 wt% of a rubber-modified aromatic vinyl-based resin and (B) between 5 and 70 wt% of a glycol-modified polyethylene terephthalate, and, with respect to 100 parts by weight of the base resin, (C) between 1 and 3 parts by weight of carbon nanotubes. The antistatic thermoplastic resin composition is highly lustrous while having outstanding antistatic properties because of the introduction of the glycol-modified polyethylene terephthalate and the carbon nanotubes.

Description

Thermoplastic resin composition and molded article excellent in antistatic property

The present invention relates to a thermoplastic resin composition having antistatic properties. More specifically, the present invention relates to an antistatic thermoplastic resin composition which is high glossy and has excellent surface resistance.

Recently, according to the trend of large-sized, high-functionality, and high-end of household appliances, various characteristics are required for resin as an exterior material. In particular, as electrical and electronic products have high performance specifications, the appearance of exterior materials is high glossy, color is expressed with high quality texture, and it has become more important to have excellent scratch resistance. In addition, the resin for such a use is also required for the antistatic property which can in principle improve problems such as dust, moisture deposition in the air by static electricity in electrical and electronic products.

As a method of imparting antistatic property, there is a method of coating an antistatic agent on the surface of a molded article molded of resin. This method can express a surface resistance value of about 10 ⁹ Ω / □, but it requires post-processing, which has a disadvantage of cost increase.

As another method of imparting antistatic properties, an antistatic material, for example, carbon black or carbon fiber, may be added to the resin, in which case the flame retardancy tends to decrease, in particular, the content of carbon black or carbon fiber. As the fluidity increases, the flame retardancy decreases, and the conductivity changes very rapidly, when the resin composition is injected with high gloss, the color is poor and the gloss is poor. there is a problem.

In Korean Patent Publication No. 2009-0026534, in order to impart an antistatic performance to a resin, an antistatic performance is imparted by coating a multilayer film in which a thermoplastic resin composite layer in which carbon nanotubes are dispersed is laminated on a thermoplastic resin layer. Secondary and tertiary processing is required after molding, which increases the processing cost.

Korean Patent Laid-Open Publication No. 2007-0052963 discloses a resin composition having antistatic properties using carbon nanotubes, but this has a problem of poor glossiness due to the invention focused on flame retardancy and antistatic properties.

Accordingly, the present inventors have led to the development of the resin composition of the present invention, which can exhibit antistatic properties while using a small amount of carbon nanotubes, and there is no loss of antistatic properties or deterioration of mechanical properties and excellent gloss.

An object of the present invention is to provide an antistatic thermoplastic resin composition having excellent surface resistance.

Another object of the present invention is to provide an antistatic thermoplastic resin composition having excellent mechanical properties such as tensile strength and impact strength.

Still another object of the present invention is to provide a high gloss molded article manufactured using the antistatic thermoplastic resin composition.

Still another object of the present invention is to provide a molded article which does not generate dust produced using the antistatic thermoplastic resin composition.

Both the above and other objects of the present invention can be achieved by the present invention described below.

The antistatic thermoplastic resin composition according to the present invention is based on 100 parts by weight of the base resin consisting of (A) 30 to 95% by weight of rubber-modified aromatic vinyl resin and (B) 5 to 70% by weight of glycol-modified polyethylene terephthalate, ( C) 1 to 3 parts by weight of carbon nanotubes.

The rubber-modified aromatic vinyl-based resin (A) is a first rubber-modified aromatic vinyl-based graft copolymer having a core-shell structure (a1) having an average particle diameter of 2,000 to 5,000 kPa with respect to 100% by weight of (a1) to (a3). 15 to 35% by weight, (a2) 5 to 15% by weight of the second rubber-modified aromatic vinyl graft copolymer of the core-shell structure having an average particle diameter of 500 to 1,500 mm 3 and (a3) the weight average molecular weight of 70,000 to 120,000 g It may include 50 to 80% by weight of the aromatic vinyl copolymer / mol.

The rubber-modified aromatic vinyl resin (A) is acrylonitrile-butadiene rubber-styrene copolymer (ABS) resin, acrylonitrile-acrylate rubber-styrene copolymer (AAS) resin, acrylonitrile-ethylene / propylene rubber -Styrene copolymer (AES) resin, methylmethacrylate-butadiene rubber-styrene copolymer (MBS) resin, or mixtures thereof.

Carbon nanotubes (C) are multi-walled carbon nanotubes, the average particle diameter is 5 nm to 100 nm, the average length may be 1 ㎛ to 50 ㎛.

In order to achieve the above another technical problem, the present invention provides a molded article prepared from an antistatic thermoplastic resin composition.

Hereinafter, specific contents of the present invention will be described in detail below.

The antistatic thermoplastic resin composition according to the present invention has excellent antistatic properties and excellent mechanical properties such as tensile strength and impact strength, and the molded article prepared by the antistatic thermoplastic resin composition is high glossy, It has the advantage that no dust is generated.

1 is an optical profiler image showing the surface roughness of a molded product specimen prepared according to Example 1 of the present invention.

2 is an optical profiler image showing the surface roughness of a molded product specimen prepared according to Comparative Example 2.

3 is an optical microscope photograph of a magnified surface of a molded product specimen prepared in Example 1 of 20 times.

4 is an optical microscope photograph of a 20-fold magnification of the surface of a molded product specimen prepared according to Comparative Example 2. FIG.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an antistatic thermoplastic resin composition, and to a thermoplastic resin composition which is high glossy and excellent in antistatic property, tensile strength and impact strength.

Antistatic Thermoplastic Resin Composition

The antistatic thermoplastic resin composition according to the present invention is based on 100 parts by weight of the base resin consisting of (A) 30 to 95% by weight of rubber-modified aromatic vinyl resin and (B) 5 to 70% by weight of glycol-modified polyethylene terephthalate, ( C) 1 to 3 parts by weight of carbon nanotubes.

The antistatic thermoplastic resin composition of the present invention includes (A) rubber-modified aromatic vinyl resin, (B) glycol-modified polyethylene terephthalate and (C) carbon nanotube. Each component is demonstrated concretely below.

(A) Rubber modified aromatic vinyl resin

(a1) First rubber-modified aromatic vinyl graft copolymer

The thermoplastic resin composition according to the present invention is prepared by a method known to those skilled in the art, or commercially available first rubber-modified aromatic vinyl-based graft air having a large particle size core-shell structure. Union a1 can be used without limitation.

The average particle diameter of the first rubber-modified aromatic vinyl graft copolymer (a1) is 2,000 to 5,000 mm 3, and preferably 2,000 to 3,500 mm 3. When the average particle diameter of the first rubber-modified aromatic vinyl graft copolymer (a1) is less than 2,000 mm 3, the impact strength of the thermoplastic resin composition may decrease.

The first rubber-modified aromatic vinyl graft copolymer (a1) may be prepared by graft copolymerization of a rubber polymer with a monomer copolymerizable with an aromatic vinyl monomer and an aromatic vinyl monomer. In addition, it may further be prepared by graft copolymerization further comprising a monomer to impart processability and heat resistance.

The first rubber-modified aromatic vinyl graft copolymer (a1) grafts 5 to 65 wt% of the rubbery polymer, 34 to 94 wt% of the aromatic vinyl monomer and 1 to 30 wt% of the monomer copolymerizable with the aromatic vinyl monomer. It may be polymerized. In addition, in order to selectively provide heat resistance and processability, the rubbery polymer may further include 0 to 15% by weight of unsaturated carboxylic acid, unsaturated carboxylic anhydride, maleimide monomer, and mixtures thereof, and may be graft polymerized.

The rubbery polymer may be a diene rubber, a saturated rubber added with hydrogen to the diene rubber, an acrylate rubber, an ethylene-propylene-diene terpolymer rubber, a silicone rubber or a mixture thereof.

The diene rubber may be polybutadiene, poly (styrene-butadiene), poly (acrylonitrile-butadiene), polyisoprene or mixtures thereof.

Acrylate rubbers include polymethyl acrylate, polyethyl acrylate, polyn-propyl acrylate, polyn-butyl acrylate, poly2-ethylhexyl acrylate, polyhexyl methacrylate, poly2-ethylhexyl methacryl Rate or mixtures thereof.

Silicone rubbers include polyhexamethyl cyclotrisiloxane, polyoctamethyl cyclosiloxane, polydecamethyl cyclosiloxane, polydodecamethyl cyclosiloxane, polytrimethyltriphenyl cyclosiloxane, polytetramethyltetrapetyl cyclotetrosiloxane, polyoctaphenyl cyclo Tetrasiloxane or mixtures thereof. As the rubbery polymer, diene rubber may be preferably selected, and butadiene rubber may be more preferably selected.

Aromatic vinyl monomers include styrene, α-methylstyrene, β-methylstyrene, p-methylstyrene, para-t-butylstyrene, ethyl styrene, vinyl xylene, monochlorostyrene, dichlorostyrene, dibromostyrene, vinyl naphthalene or Mixtures thereof.

The monomer copolymerizable with the aromatic vinyl monomer may be an unsaturated nitrile monomer, an acrylate monomer, or a mixture thereof.

The unsaturated nitrile monomer may be acrylonitrile, methacrylonitrile, ethacrylonitrile or mixtures thereof. The acrylic monomer may be methyl acrylate, methyl methacrylate, ethyl acrylate, ethyl methacrylate or mixtures thereof.

The first rubber-modified aromatic vinyl graft copolymer (a1) may contain 0 to 15% by weight of an unsaturated carboxylic acid, an unsaturated carboxylic anhydride, a maleimide monomer, or a mixture thereof in the rubbery polymer to impart heat resistance and processability. It may further comprise graft polymerization.

The unsaturated carboxylic acid may be acrylic acid or methacrylic acid. The unsaturated carboxylic anhydride may be maleic anhydride. The maleimide monomer may be alkyl or nucleosubstituted maleimide.

In the present invention, the first rubber-modified aromatic vinyl graft copolymer (a1) is the first rubber-modified aromatic vinyl graft copolymer (a1), the second rubber-modified aromatic vinyl graft copolymer (a2) and aromatic With respect to 100% by weight of the vinyl copolymer (a3), 15 to 35% by weight may be included. When the content of the first rubber-modified aromatic vinyl graft copolymer (a1) is less than 15% by weight, the impact strength of the thermoplastic resin composition may be lowered, and when the content of the first rubber-modified aromatic vinyl graft copolymer (a1) is greater than 35% by weight, the dispersibility of carbon nanotubes in the thermoplastic resin composition This can be degraded.

(a2) Second rubber-modified aromatic vinyl graft copolymer

When only the first rubber-modified aromatic vinyl graft copolymer (a1) having a core-shell structure having a large particle size is used, the dispersibility of carbon nanotubes is lowered. The second rubber-modified aromatic vinyl graft copolymer (a2) having a shell structure is used together. When the second rubber-modified aromatic vinyl graft copolymer (a2) is used, a second rubber-modified aromatic vinyl graft copolymer having a small particle size between the first rubber-modified aromatic vinyl graft copolymer (a1) having a large particle size Since (a2) may be located, dispersibility of carbon nanotubes may be improved.

The average particle diameter of the second rubber-modified aromatic vinyl graft copolymer (a2) is 500 to 1,500 mm 3, and preferably 1,000 to 1,500 mm 3.

The second rubber-modified aromatic vinyl graft copolymer (a2) may be prepared by graft copolymerization of a rubber polymer with a monomer copolymerizable with an aromatic vinyl monomer and an aromatic vinyl monomer. In addition, it may further be prepared by graft copolymerization further comprising a monomer to impart processability and heat resistance.

The second rubber-modified aromatic vinyl graft copolymer (a2) grafts 5 to 65 wt% of the rubbery polymer, 34 to 94 wt% of the aromatic vinyl monomer and 1 to 30 wt% of the copolymerizable monomer with the aromatic vinyl monomer. It may be polymerized. In addition, in order to selectively provide heat resistance and processability, the rubbery polymer may further include 0 to 15% by weight of unsaturated carboxylic acid, unsaturated carboxylic anhydride, maleimide monomer, and mixtures thereof, and may be graft polymerized.

The monomer copolymerizable with the rubbery polymer, the aromatic vinyl monomer and the aromatic vinyl monomer is copolymerizable with the rubbery polymer, the aromatic vinyl monomer and the aromatic vinyl monomer described in the first rubber-modified aromatic vinyl graft copolymer (a1). Same as the monomer, the description is omitted to avoid duplication.

In the present invention, the second rubber modified aromatic vinyl graft copolymer (a2) is a first rubber modified aromatic vinyl graft copolymer (a1), the second rubber modified aromatic vinyl graft copolymer (a2) and aromatic It may be included in 5 to 15% by weight based on 100% by weight of the vinyl copolymer (a3). When the content of the second rubber-modified aromatic vinyl graft copolymer (a2) is less than 5 wt%, the dispersibility of the carbon nanotubes may be lowered, and thus the antistatic property of the thermoplastic resin composition may be lowered.

(a3) aromatic vinyl copolymer

In the thermoplastic resin composition according to the present invention, an aromatic vinyl copolymer (a3) prepared by a method known to those skilled in the art or commercially available may be used without limitation. Examples of the aromatic vinyl copolymer (a3) include an alternating copolymer, a random copolymer, a block copolymer, and the like, and the copolymer does not include a graft copolymer.

The aromatic vinyl copolymer (a3) may have a weight average molecular weight of 70,000 to 120,000 g / mol measured by gel permeation chromatography (GPC). Preferably from 90,000 to 110,000 g / mol. When the weight average molecular weight of the aromatic vinyl copolymer (a3) is more than 120,000 g / mol, dispersibility of carbon nanotubes may be reduced.

The aromatic vinyl copolymer (a3) may be prepared by copolymerizing an aromatic vinyl monomer and a monomer copolymerizable with the aromatic vinyl monomer. In addition, it may be prepared by further copolymerizing a monomer that optionally provides processability and heat resistance.

The aromatic vinyl copolymer (a3) may be obtained by polymerizing 60 to 90 wt% of the aromatic vinyl monomer and 10 to 40 wt% of the monomer copolymerizable with the aromatic vinyl monomer.

Aromatic vinyl monomers include styrene, α-methylstyrene, β-methylstyrene, p-methylstyrene, para-t-butylstyrene, ethyl styrene, vinyl xylene, monochlorostyrene, dichlorostyrene, dibromostyrene or mixtures thereof Can be. Preferably styrene can be used.

The monomer copolymerizable with the aromatic vinyl monomer may be an unsaturated nitrile monomer, an acrylate monomer or a mixture thereof.

The unsaturated nitrile monomer may be acrylonitrile, methacrylonitrile, ethacrylonitrile or mixtures thereof. The acrylate monomer may be methyl acrylate, methyl methacrylate or mixtures thereof.

The aromatic vinyl copolymer (a3) may further polymerize an unsaturated carboxylic acid, an unsaturated carboxylic anhydride, a maleimide monomer, or a mixture thereof in order to impart heat resistance and processability.

The unsaturated carboxylic acid may be acrylic acid or methacrylic acid. The unsaturated carboxylic anhydride may be maleic anhydride. The maleimide monomer may be alkyl or nucleosubstituted maleimide.

In the present invention, the aromatic vinyl copolymer (a3) is the first rubber modified aromatic vinyl graft copolymer (a1), the second rubber modified aromatic vinyl graft copolymer (a2) and aromatic vinyl copolymer (a3) ) Based on 100% by weight, 50 to 80% by weight may be included. When the content of the aromatic vinyl copolymer (a3) is more than 80% by weight, the impact strength of the thermoplastic resin composition may decrease.

In the present invention, the rubber-modified aromatic vinyl resin (A) is used in 30 to 95% by weight relative to 100% by weight of the base resin consisting of rubber-modified aromatic vinyl resin (A) and glycol-modified polyethylene terephthalate (B). desirable. If the rubber-modified aromatic vinyl resin (A) is used at less than 30% by weight, the impact strength may be lowered, and when used in excess of 95% by weight, the tensile strength may be lowered.

In the present invention, non-limiting examples of the rubber-modified aromatic vinyl resin (A) include acrylonitrile-butadiene rubber-styrene copolymer (ABS) resin, acrylonitrile-acrylate rubber-styrene copolymer (AAS) Resin, acrylonitrile-ethylene / propylene rubber-styrene copolymer (AES) resin, methyl methacrylate-butadiene rubber-styrene copolymer (MBS) resin, or a mixture thereof.

(B) glycol modified polyethylene terephthalate

The glycol-modified polyethylene terephthalate (B) of the present invention can be easily prepared or commercially obtained by those skilled in the art.

The glycol-modified polyethylene terephthalate (B) may be a thermoplastic resin copolymerized by adding a large amount of CHDM (1,6-cyclohexanedimethanol) based on terephthalic acid (TPA) and ethylene glycol (Ethylent Glycol, EG).

Glycol-modified polyethylene terephthalate (B) of the present invention can increase the dispersing force of the carbon nanotubes (C) to lower the surface resistance of the thermoplastic resin composition to increase the antistatic properties, the surface roughness of the molded article is improved to a high gloss surface Can be obtained.

In the present invention, the glycol-modified polyethylene terephthalate (B) is preferably contained 5 to 70% by weight relative to 100% by weight of the base resin consisting of a rubber-modified aromatic vinyl resin (A) and glycol-modified polyethylene terephthalate (B). Do. When the glycol-modified polyethylene terephthalate (B) is included in less than 5% by weight, the surface resistance of the thermoplastic resin composition is increased, the antistatic property is lowered, the surface roughness of the molded article using the same may be increased, and exceeds 70% by weight When included, the impact strength of the thermoplastic resin composition may be lowered.

(C) carbon nanotubes

The present invention uses carbon nanotubes (C) to improve the antistatic properties of the thermoplastic resin. Carbon nanotubes according to the present invention is a single-walled carbon nanotube (single-walled carbon nanotube), double-walled carbon nanotube (double-walled carbon nanotube), multi-walled carbon nanotube (multi-walled carbon nanotube), It may include a tube (rope carbon nanotube), preferably a multi-walled carbon nanotube may be used. It is commercially advantageous to use multi-walled carbon nanotubes, which are relatively inexpensive and high purity, compared to single-walled carbon nanotubes, which are expensive and have a relatively high impurity content.

The carbon nanotubes (C) may have an average particle diameter of 5 nm to 100 nm and an average length of 1 μm to 50 μm. Preferably the average particle diameter may be 5 nm to 30 nm, the average length is 1 ㎛ to 25 ㎛. When the carbon nanotubes (C) have a diameter in the above range, it is easy to disperse into the thermoplastic resin composition, and the antistatic properties can be improved by the network between the carbon nanotubes, so that even when a trace amount is improved. It can be effective.

In the present invention, the carbon nanotube (C) is based on 100 parts by weight of the base resin consisting of a rubber-modified aromatic vinyl resin (A) and a glycol-modified polyethylene terephthalate (B), 1 to 3 by weight of carbon nanotubes (C) It is preferable to use it by wealth. When the content of the carbon nanotubes (C) is less than 1 part by weight, it is difficult to express the antistatic properties of the thermoplastic resin composition, and when it is more than 3 parts by weight, the impact strength of the thermoplastic resin composition may be lowered.

(D) additive

The antistatic thermoplastic resin composition of the present invention may further include an additive (D) according to each use. The antistatic thermoplastic resin composition may further include, as an additive (D), a flame retardant, a flame retardant aid, an antidrip agent, an antioxidant, a plasticizer, a weather stabilizer, a pigment, a dye, a colorant, an inorganic additive, and / or a mixture thereof. It is not limited to this.

In the present invention, the additive (D) is preferably used 0.1 to 75 parts by weight based on 100 parts by weight of the base resin consisting of rubber-modified aromatic vinyl resin (A) and glycol-modified polyethylene terephthalate (B).

The antistatic thermoplastic resin composition according to the present invention can be produced by a known method for producing a resin composition. For example, the components of the present invention and other additives may be mixed at the same time and then melt-extruded in an extruder to produce pellets or chips.

Molded article

The present invention also provides a molded article prepared from the thermoplastic resin composition. There is no particular limitation on the method of molding the molded article, and extrusion, injection, casting molding, etc. may be applied. Such molding can be easily carried out by those skilled in the art.

In accordance with ASTM D638, the molded article of the present invention may have a tensile strength of 350 to 500 kgf / cm 2 measured at a tensile speed of 50 mm / min for a 1/8 inch thick specimen.

The molded article of the present invention may have a glossiness of 95% or more measured at an angle of 60 ° using SUGA's UGV-6P digital variable glossmeter.

In accordance with ASTM D257, the molded article of the present invention may have a surface resistance of 10 ⁷ to 10 ¹³ Ω / □ measured using Wolfgang Warmbler's SRM-100.

In the molded article of the present invention, the impact strength of the 1/8 inch specimen measured according to ASTM D256 may be 9 to 20 kgf · cm / cm.

In accordance with ASTM D1238, the molded article of the present invention may have a melt flow index (MI) of 10 to 80 g / 10 min measured at a temperature of 220 ° C. and a load of 10 kg.

The molded article of the present invention may have a surface roughness of 35 nm to 38 nm measured by NT1100 of Vecco, an optical profiler.

The invention can be better understood by the following examples, which are intended for the purpose of illustration of the invention and are not intended to limit the scope of protection defined by the appended claims.

Examples and Comparative Examples

Each component used in the Example and the comparative example is as follows.

(A) Rubber modified aromatic vinyl resin

(a1) First rubber-modified aromatic vinyl graft copolymer

The acrylonitrile-butadiene rubber-styrene (ABS) graft copolymer of Cheil Industries, with an average particle diameter of 2,600 mm 3 was used.

(a2) Second rubber-modified aromatic vinyl graft copolymer

An acrylonitrile-butadiene rubber-styrene (ABS) graft copolymer of Cheil Industries, having an average particle diameter of 1,300 mm 3 was used.

(a3) aromatic vinyl copolymer

A styrene-acrylonitrile (SAN) copolymer of Cheil Industries, Ltd., having a weight average molecular weight of 100,000 g / mol, as measured by GPC, was used.

(B) glycol modified polyethylene terephthalate

SK Chemical's SKYGREEN PETG S2008 was used.

(C) carbon nanotubes

Nanocyl NC7000 was used as a multi-walled carbon nanotube having an average particle diameter of 5 nm to 30 nm and an average length of 1 μm to 25 μm.

Example 1-3 and Comparative Example 1-3

After mixing in a conventional mixer according to the contents shown in Table 1, the mixture was melted / kneaded through a twin screw extruder having L / D = 36 and ø = 45 mm at 240 to 260 ° C., respectively, to form a thermoplastic resin composition in pellet form. Prepared. Each prepared pellet was dried at 80 ° C. for 4 hours, and then injected at 240-260 ° C. using a Woojin SELEX TE 150 injection machine to prepare specimens for evaluation of physical properties. In addition, high gloss specimens for high gloss, surface resistance and surface roughness were prepared by using a mold having a high mirror surface at a temperature of 240 to 260 ° C., an injection speed of 1 to 30 mm / s, and a holding pressure of 50 to 250 MPa. .

In the following Table 1, the mixing ratios of (A), (B) and (C) are expressed in parts by weight based on (A) and (B) 100 parts by weight.

Table 1

The physical properties of the prepared specimens were measured by the following method, and the results are shown in Table 2.

(1) Tensile Strength (kgf / cm 2): Tensile strength was measured at a tensile speed of 50 mm / min on a 1/8 inch thick specimen in accordance with ASTM D638.

(2) Glossiness (%): Measured at 60 ° using a SUGA UGV-6P digital variable glossmeter.

(3) Surface resistance (Ω / □): For high-surface mirror specimens, measured using Wolfgang Warmbler's SRM-100 according to ASTM D257.

(4) Izod impact strength (kgf · cm / cm): Measured on a 1/8 inch thick specimen in accordance with ASTM D256.

(5) Melt Flow Index (g / 10min): The melt flow index (MI) was measured on a dried pellet at a temperature of 220 ° C. and a load of 10 kg according to ASTM D1238.

(6) Surface roughness (nm): The surface roughness of the specimen was measured with a NT1100 manufactured by Vecco, an optical profiler, for the high specular specimen.

(7) Surface roughness: The surface roughness of the specimens was magnified by 20 times with Keyence VHX-500F optical microscope.

TABLE 2

As shown in Table 2, Examples 1 to 3 have a high gloss surface, maintain excellent tensile strength and impact strength, and the melt flow index is not too low or high, the moldability is good, showing excellent antistatic properties It was. 1 and 3, the molded article using the resin composition according to the present invention (Example 1) was found to exhibit a high gloss surface because of the excellent surface roughness.

On the other hand, Comparative Example 2, which does not use the glycol-modified polyethylene terephthalate (B) of the present invention, as shown in Table 2, Figure 2 and Figure 4, the surface roughness is reduced, the glycol-modified polyethylene terephthalate (B) Comparative Example 3 does not use the preferred content range can be seen that the impact strength is lowered.

In addition, Comparative Example 1, which does not use the carbon nanotubes (C) of the present invention, can be seen that the surface resistance is not measured and thus antistatic property does not appear.

Simple modifications or changes of the present invention can be easily carried out by those skilled in the art, and all such modifications or changes can be seen to be included in the scope of the present invention.

Claims (11)

1. (A) 30 to 95% by weight of a rubber modified aromatic vinyl resin; And

   (B) 5 to 70% by weight glycol modified polyethylene terephthalate;

   Based on 100 parts by weight of the base resin consisting of,

   (C) 1 to 3 parts by weight of carbon nanotubes;

   Antistatic thermoplastic resin composition comprising a.
2. According to claim 1, wherein the rubber-modified aromatic vinyl resin (A) (a1) 15 to 35% by weight of the first rubber-modified aromatic vinyl graft copolymer of the core-shell structure having an average particle diameter of 2,000 to 5,000 mm 3, (a2) 5 to 15% by weight of the second rubber-modified aromatic vinyl graft copolymer having a core-shell structure having an average particle diameter of 500 to 1,500 mm 3, and (a3) Aromatic vinyl having a weight average molecular weight of 70,000 to 120,000 g / mol. Antistatic thermoplastic resin composition comprising 50 to 80% by weight of the copolymer.
3. The method of claim 1, wherein the rubber modified aromatic vinyl resin (A) is acrylonitrile-butadiene rubber-styrene copolymer (ABS) resin, acrylonitrile-acrylate rubber-styrene copolymer (AAS) resin, acrylic An antistatic thermoplastic resin selected from the group consisting of ronitrile-ethylene / propylene rubber-styrene copolymer (AES) resins, methylmethacrylate-butadiene rubber-styrene copolymer (MBS) resins and mixtures thereof Composition.
4. The antistatic thermoplastic resin composition according to claim 1, wherein the carbon nanotubes (C) are multi-walled carbon nanotubes.
5. The antistatic thermoplastic resin composition according to claim 1, wherein the carbon nanotubes (C) have an average particle diameter of 5 nm to 100 nm, and an average length of 1 μm to 50 μm.
6. The charging method of claim 1, further comprising an additive selected from the group consisting of flame retardants, flame retardant aids, anti-dripping agents, antioxidants, plasticizers, weather stabilizers, pigments, dyes, colorants, inorganic additives, and mixtures thereof. Preventive thermoplastic resin composition.
7. A molded article prepared from the antistatic thermoplastic resin composition according to any one of claims 1 to 6.
8. The molded article according to claim 7, wherein the glossiness measured at an angle of 60 ° using a SUGA UGV-6P digital variable glossmeter is 95% or more.
9. The molded article according to claim 7, wherein the surface roughness measured by Vecco NT1100, an optical profiler, is from 35 nm to 38 nm.
10. The molded article according to claim 7, wherein the surface resistance measured by using Wolfgang Warmbler's SRM-100 according to ASTM D257 is 10 ⁷ to 10 ¹³ Pa / □.
11. The molded article according to claim 7, wherein the melt flow index is 10 to 80 g / 10 min, measured at a temperature of 220 ° C. and a load of 10 kg according to ASTM D1238.

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