Classifications

• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L51/00—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
  • C08L51/04—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers grafted on to rubbers
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
  • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
  • C08K3/00—Use of inorganic substances as compounding ingredients
  • C08K3/02—Elements
  • C08K3/04—Carbon
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
  • C08K3/00—Use of inorganic substances as compounding ingredients
  • C08K3/02—Elements
  • C08K3/04—Carbon
  • C08K3/041—Carbon nanotubes
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
  • C08K7/00—Use of ingredients characterised by shape
  • C08K7/22—Expanded, porous or hollow particles
  • C08K7/24—Expanded, porous or hollow particles inorganic
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L25/00—Compositions of, homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Compositions of derivatives of such polymers
  • C08L25/02—Homopolymers or copolymers of hydrocarbons
  • C08L25/04—Homopolymers or copolymers of styrene
  • C08L25/08—Copolymers of styrene
  • C08L25/12—Copolymers of styrene with unsaturated nitriles
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
  • C08K2201/00—Specific properties of additives
  • C08K2201/011—Nanostructured additives
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L2205/00—Polymer mixtures characterised by other features
  • C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L2205/00—Polymer mixtures characterised by other features
  • C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
  • C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L2205/00—Polymer mixtures characterised by other features
  • C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend

Definitions

• the present invention relates to a conductive thermoplastic resin composition. More specifically, the present invention relates to a thermoplastic resin composition excellent in conductivity and impact strength.
• Electrostatic coating is performed on the thermoplastic resin after the primer treatment for imparting conductivity.
• Electrostatic painting is a method of adsorbing paint by applying charge to the paint in the sprayed state and applying a high voltage to the paint. Specifically, a positive electrode is applied to the coating material, and a negative electrode is applied to the spraying device, and the paint particles are adsorbed onto the coating material by applying (-) static electricity to the sprayed paint particles. Electrostatic coating is less paint loss than general spray method, the quality and performance of the coating film is excellent, automatic installation is possible, and coating is possible regardless of the size of the painting.
• the surface of the coating must be coated with a carbon solution before electrostatic coating to apply a primer treatment.
• additional equipment, space and cost for primer treatment are required, and the quality of the coating film varies according to the primer coating thickness, and if the primer treatment is not uniformly performed on the surface of the coating, electrostatic coating Coating efficiency is reduced.
• the present inventors add carbon nanotubes to a thermoplastic resin to impart conductivity of the resin itself, thereby enabling electrostatic coating without a primer treatment, and specifying a composition ratio of the thermoplastic resin to add carbon nanotubes.
• a thermoplastic resin composition that can prevent the deterioration of physical properties.
• An object of the present invention is to provide a thermoplastic resin composition having excellent conductivity.
• Another object of the present invention is to provide a thermoplastic resin composition excellent in impact strength.
• Another object of the present invention is to provide a thermoplastic resin composition capable of electrostatic coating without primer treatment.
• Still another object of the present invention is to provide a thermoplastic resin composition having excellent electrostatic coating efficiency.
• the conductive thermoplastic resin composition according to the present invention is (A) 15 to 35% by weight of the rubber-modified aromatic vinyl graft copolymer of the core-shell structure having an average particle diameter of 2,000 to 5,000 kPa, (B) 500 to 1,500 kPa 5 to 15% by weight of a rubber-modified aromatic vinyl graft copolymer having a phosphorus core-shell structure, and (C) a base comprising 50 to 80% by weight of an aromatic vinyl copolymer having a weight average molecular weight of 70,000 to 120,000 g / mol. It may contain 1 to 5 parts by weight of (D) carbon nanotubes based on 100 parts by weight of the resin.
• the carbon nanotubes (D) may have an average particle diameter of 5 to 100 nm and an average length of 1 to 50 ⁇ m.
• the rubber-modified aromatic vinyl graft copolymer (A) having a core-shell structure having an average particle diameter of 2,000 to 5,000 mm 3 is contained in an aromatic vinyl monomer 34 to 5 to 65 wt% of a rubbery polymer having an average particle diameter of 50 to 500 mm 3. It can be prepared by graft polymerization of 94% by weight and 1 to 30% by weight of the copolymerizable monomer with the aromatic vinyl monomer.
• the rubber-modified aromatic vinyl graft copolymer (B) having a core-shell structure having an average particle diameter of 500 to 1,500 mm 3 is contained in an aromatic vinyl monomer of 34 to 94 to 5 to 65 wt% of a rubbery polymer having an average particle diameter of 20 to 300 mm 3. It may be prepared by graft polymerization of 1% to 30% by weight and a monomer copolymerizable with the aromatic vinyl monomer.
• the rubber-modified aromatic vinyl graft copolymer (A) of the core-shell structure and the rubber-modified aromatic vinyl graft copolymer (B) of the core-shell structure include unsaturated carboxylic acid, unsaturated carboxylic anhydride, Maleimide-based monomers or mixtures thereof may be further graft polymerized to 0-15% by weight.
• the aromatic vinyl copolymer (C) having a weight average molecular weight of 70,000 to 120,000 g / mol is obtained by polymerizing 60 to 90% by weight of an aromatic vinyl monomer and 10 to 40% by weight of a monomer copolymerizable with the aromatic vinyl monomer.
• the aromatic vinyl copolymer (C) may further polymerize 0 to 30% by weight of an unsaturated carboxylic acid, an unsaturated carboxylic anhydride, a maleimide monomer, or a mixture thereof.
• 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 monomer terpolymer, a silicone rubber, or a mixture thereof.
• the aromatic vinyl monomers are styrene, ⁇ -methylstyrene, ⁇ -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 acrylic monomer, or a mixture thereof.
• the conductive thermoplastic resin composition of the present invention may further include carbon black.
• the conductive thermoplastic resin composition of the present invention may further include an impact modifier, an antidropping agent, an antioxidant, a plasticizer, a heat stabilizer, a light stabilizer, a compatibilizer, a weather stabilizer, a pigment, a dye, a colorant, an inorganic additive, or a mixture thereof as an additive.
• an impact modifier an antidropping agent, an antioxidant, a plasticizer, a heat stabilizer, a light stabilizer, a compatibilizer, a weather stabilizer, a pigment, a dye, a colorant, an inorganic additive, or a mixture thereof as an additive.
• the molded article according to the present invention is molded from the conductive thermoplastic resin composition according to the present invention.
• the conductive thermoplastic resin composition according to the present invention has excellent conductivity and impact strength, can be electrostatically coated without a primer treatment, and has excellent efficiency of electrostatic coating.
• the present invention relates to a conductive thermoplastic resin composition, and to a thermoplastic resin composition excellent in conductivity and impact strength.
• the conductive thermoplastic resin composition according to the present invention is (A) 15 to 35% by weight of the rubber-modified aromatic vinyl graft copolymer of the core-shell structure having an average particle diameter of 2,000 to 5,000 kPa, (B) 500 to 1,500 kPa 5 to 15% by weight of a rubber-modified aromatic vinyl graft copolymer having a phosphorus core-shell structure, and (C) a base comprising 50 to 80% by weight of an aromatic vinyl copolymer having a weight average molecular weight of 70,000 to 120,000 g / mol. It may include 1 to 5 parts by weight of (D) carbon nanotubes based on 100 parts by weight of the resin.
• thermoplastic resin composition a rubber-modified aromatic vinyl-based graft copolymer having a core-shell structure of a large particle diameter prepared by a method known to those skilled in the art or commercially available ( A) can be used without limitation.
• the average particle diameter of the rubber-modified aromatic vinyl graft copolymer (A) having a large particle size core-shell structure may be 2,000 to 5,000 mm 3, and preferably 2,000 to 3,000 mm 3. When the average particle diameter is less than 2,000 mm 3, the impact strength of the thermoplastic resin composition may decrease.
• the rubber-modified aromatic vinyl graft copolymer (A) having a core-shell structure having a large particle diameter is a graft copolymer of an aromatic vinyl monomer and a monomer copolymerizable with the aromatic vinyl monomer in a rubbery polymer having an average particle diameter of 50 to 500 mm 3.
• the rubber-modified aromatic vinyl graft copolymer (A) having a large particle diameter core-shell structure is 5 to 65% by weight of a rubbery polymer having an average particle diameter of 50 to 500 mm 3, 34 to 94% by weight of an aromatic vinyl monomer and the aromatic vinyl 1 to 30% by weight of the monomer copolymerizable with the monomer is graft polymerized.
• 0-15% by weight of further grafted unsaturated carboxylic acid, unsaturated carboxylic anhydride, maleimide monomer and mixtures thereof may be further graft polymerized to the rubbery polymer to provide heat resistance and processability.
• 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 monomer terpolymer, 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.
• diene rubber may be preferably selected, and butadiene rubber may be more preferably selected.
• the rubbery polymer may have an average particle diameter of 50 to 500 mm 3. When the average particle diameter of the rubbery polymer is included in the above range, the impact strength and appearance are excellent.
• Aromatic vinyl monomers are styrene, ⁇ -methylstyrene, ⁇ -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 acrylic monomer, or a mixture thereof.
• the nitrile-based monomer may be acrylonitrile, methacrylonitrile, ethacrylonitrile or mixtures thereof.
• the acrylic monomers may be methyl acrylate, methyl methacrylate, or mixtures thereof.
• the rubber-modified aromatic vinyl graft copolymer (A) of the core-shell structure having a large particle diameter is a unsaturated carboxylic acid, an unsaturated carboxylic anhydride, a maleimide monomer, or a carboxylic acid in order to impart heat resistance and workability.
• the mixture can be further graft polymerized from 0 to 15% by weight.
• the unsaturated carboxylic acid may be acrylic acid or methacrylic acid.
• Unsaturated carboxylic anhydride is maleic anhydride.
• the maleimide monomer may be alkyl, or nuclear substituted maleimide.
• the rubber-modified aromatic vinyl graft copolymer (A) of the core-shell structure having a large particle size is a rubber-modified aromatic vinyl graft copolymer (A) of the core-shell structure having a large particle size, a core-shell having a small particle size.
• the rubber-modified aromatic vinyl graft copolymer (B) and the aromatic vinyl copolymer (C) of the structure may include 15 to 35% by weight.
• the content of the rubber-modified aromatic vinyl graft copolymer (A) of the core-shell structure having a large particle size is less than 15% by weight, the impact strength of the thermoplastic resin composition is lowered, and when the content is more than 35% by weight, carbon in the thermoplastic resin composition Dispersibility of the nanotubes may be reduced.
• a core having a small particle size between the rubber-modified aromatic vinyl graft copolymer (A) having a large particle size core-shell structure may be located, and thus dispersibility of carbon nanotubes may be improved.
• the average particle diameter of the rubber-modified aromatic vinyl graft copolymer (B) having a small particle size core-shell structure may be 500 to 1,500 mm 3, and preferably 1,000 to 1,500 mm 3.
• the rubber-modified aromatic vinyl graft copolymer (B) having a small particle size core-shell structure is graft copolymerized with a rubber polymer having an average particle diameter of 20 to 300 mm 3 and a monomer copolymerizable with an aromatic vinyl monomer and an aromatic vinyl monomer.
• a rubber polymer having an average particle diameter of 20 to 300 mm 3 and a monomer copolymerizable with an aromatic vinyl monomer and an aromatic vinyl monomer.
• Rubber-modified aromatic vinyl graft copolymer (B) having a small particle size core-shell structure is 5 to 65% by weight of a rubbery polymer having an average particle diameter of 20 to 300 mm 3, 34 to 94% by weight of an aromatic vinyl monomer and aromatic vinyl 1 to 30% by weight of the monomer copolymerizable with the monomer is graft polymerized.
• 0-15% by weight of further grafted unsaturated carboxylic acid, unsaturated carboxylic anhydride, maleimide monomer, or mixtures thereof may be further graft polymerized to the rubbery polymer to impart heat resistance and processability.
• the monomer copolymerizable with the rubbery polymer, the aromatic vinylic monomer and the aromatic vinylic monomer includes the rubbery polymer, the aromatic vinylic monomer and the aromatic vinyl described in the rubber-modified aromatic vinyl-based graft copolymer (A) having the above-mentioned core-shell structure. It is the same as the monomer copolymerizable with the monomer and the description is omitted in order to avoid duplication.
• the rubber-modified aromatic vinyl graft copolymer (B) having a core-shell structure of a small particle size is a rubber-modified aromatic vinyl graft copolymer (A) having a core-shell structure of a large particle size, and a core- of a small particle size. 5 to 15 wt% of the rubber-modified aromatic vinyl graft copolymer (B) and the aromatic vinyl copolymer (C) having a shell structure may be included.
• the content of the rubber-modified aromatic vinyl graft copolymer (B) having a small particle size core-shell structure is less than 5% by weight, the dispersibility of carbon nanotubes may be lowered, thereby lowering the conductivity of the thermoplastic resin composition.
• an aromatic vinyl copolymer (C) prepared by a method known to those skilled in the art or commercially available may be used without limitation.
• the aromatic vinyl copolymer (C) 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 (C) may have a weight average molecular weight of 70,000 to 120,000 g / mol, preferably 90,000 to 110,000 g / mol. When the weight average molecular weight of the aromatic vinyl copolymer (C) is more than 120,000 g / mol, dispersibility of the carbon nanotubes may decrease.
• the aromatic vinyl copolymer (C) may be prepared by copolymerizing an aromatic vinyl monomer and a monomer copolymerizable with the aromatic vinyl monomer. It can also be prepared by further copolymerizing monomers which optionally provide processability and heat resistance.
• the aromatic vinyl copolymer (C) may be prepared by polymerizing 60 to 90% by weight of an aromatic vinyl monomer and 10 to 40% by weight of a monomer copolymerizable with the aromatic vinyl monomer.
• the aromatic vinyl monomers are styrene, ⁇ -methylstyrene, ⁇ -methylstyrene, p-methylstyrene, para t-butylstyrene, ethyl styrene, vinyl xylene, monochlorostyrene, dichlorostyrene, dibromostyrene, or mixtures thereof Can be.
• styrene can be used.
• the monomer copolymerizable with the aromatic vinyl monomer may be an unsaturated nitrile monomer, an acrylic monomer, or a mixture thereof.
• the unsaturated nitrile monomer may be acrylonitrile, methacrylonitrile, ethacrylonitrile, or a mixture thereof.
• the acrylic monomers may be methyl acrylate, methyl methacrylate, or mixtures thereof.
• the aromatic vinyl copolymer (C) may further polymerize 0 to 30% by weight of 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 nuclear substituted maleimide.
• the aromatic vinyl copolymer (C) is a rubber-modified aromatic vinyl graft copolymer (A) having a core-shell structure of a large particle size, and a rubber-modified aromatic vinyl graft copolymer having a core-shell structure of a small particle size.
• (B) 50 to 80% by weight based on 100% by weight of the aromatic vinyl copolymer (C).
• the content of the aromatic vinyl copolymer (C) is more than 80% by weight, the impact strength of the thermoplastic resin composition may decrease.
• thermoplastic resin composition according to the present invention may be prepared by a method known to those skilled in the art, or commercially available carbon nanotubes (D) may be used without limitation. Since carbon nanotubes (D) lower the surface resistance of the thermoplastic resin composition and increase the conductivity of the thermoplastic resin composition, the carbon nanotube (D) enables electrostatic coating even without a primer treatment.
• the method of synthesizing carbon nanotubes is arc-discharge, pyrolysis, laser vaporization, plasma chemical vapor deposition, and thermal chemical vapor deposition. , Electrolysis, flame synthesis, and the like, but the carbon nanotubes (D) used in the present invention may use all of the obtained carbon nanotubes regardless of the synthesis method.
• Carbon nanotubes can be divided into single wall carbon nanotubes, double wall carbon nanotubes, multi wall carbon nanotubes, and truncated cones depending on the number of walls. It can be divided into a cup-stacked carbon nanofiber having a hollow tube shape in which a plurality of truncated graphenes are stacked. Carbon nanotubes (D) used in the present invention is not limited to the kind, it is economically preferable to use multi-walled carbon nanotubes.
• the carbon nanotubes (D) may have an average particle diameter of 5 to 100 nm, an average length of 1 to 50 ⁇ m, preferably an average particle diameter of 5 to 30 nm, and an average length of 1 to 50 ⁇ m.
• the carbon nanotube (D) is a rubber-modified aromatic vinyl graft copolymer (A) of a core-shell structure of a large particle size, a rubber-modified aromatic vinyl graft copolymer (B) of a core-shell structure of a small particle size (B) ), 1 to 5 parts by weight based on 100 parts by weight of the aromatic vinyl copolymer (C).
• the content of the carbon nanotubes (D) is less than 1 part by weight, the conductivity of the thermoplastic resin composition is lowered, and when it is more than 5 parts by weight, the impact strength of the thermoplastic resin composition may be lowered.
• carbon black may be further used as a conductive agent.
• the carbon black has a specific surface area of 50 to 1500 m 2 / g and an average particle size of 10 to 100 nm in order to implement excellent electrical conductivity.
• the carbon black may be ketjen black, acetylene balck, furnace black, channel black, timcal carbon black, or mixtures thereof. It is preferable to use Ketjen Black which is excellent in electrical conductivity among these.
• Carbon black has excellent electrical conductivity, but has a property that carbon particles are likely to fall off due to scratches or friction, and thus, a large amount of wear occurs.
• an excessive amount of carbon black is used, there is a problem that the extrudability of the molded article is reduced.
• a fine conductive three-dimensional network structure can be formed between the carbon fibrils of the carbon nanotubes, thereby achieving stabilization of the surface resistance value and stabilization of carbon particle dropping.
• the conductive agent (E) is a rubber-modified aromatic vinyl graft copolymer (A) having a core-shell structure of a large particle size, and a rubber-modified aromatic vinyl graft copolymer (B) having a core-shell structure of a small particle size.
• aromatic vinyl copolymer (C) Based on 100 parts by weight of the aromatic vinyl copolymer (C), 0.5 to 10 parts by weight may be included.
• the content of the conductive agent (E) is less than 0.5 parts by weight, the electrical conductivity is lowered, and when it is more than 10 parts by weight, mechanical properties and extrudability may be lowered.
• thermoplastic resin composition of the present invention may further include an additive (F) according to each use of the resin composition.
• the thermoplastic resin composition may further include an impact modifier, an antidropping agent, an antioxidant, a plasticizer, a heat stabilizer, a light stabilizer, a compatibilizer, a weather stabilizer, a pigment, a dye, a colorant, an inorganic additive, or a mixture thereof.
• the additive (F) is a rubber-modified aromatic vinyl graft copolymer (A) of a core-shell structure of a large particle size, a rubber-modified aromatic vinyl graft copolymer (B) of a core-shell structure of a small particle size, 10 parts by weight or less, preferably 0.0001 parts by weight to 10 parts by weight or less based on 100 parts by weight of the aromatic vinyl copolymer (C).
• thermoplastic resin composition according to the present invention can be produced by a known method for producing a resin composition.
• the thermoplastic resin composition according to the present invention may be prepared in the form of pellets by a method of simultaneously mixing the components of the present invention and other additives and then melt extrusion in an extruder.
• thermoplastic resin composition there is no particular limitation on the method for producing a molded article by molding the thermoplastic resin composition according to the present invention.
• an extrusion, injection or cast molding method may be applied. Molding method can be easily carried out by those skilled in the art.
• the molded article of the present invention has an Izod impact strength of 15 to 40 kgf ⁇ cm / cm for a molded article of 1/8 ′′ thickness measured at 23 ° C. in accordance with ASTM D256.
• the molded article of the present invention has a surface resistance of 10 ⁇ 1 to 10 11 ⁇ s / ⁇ measured using Wolfgang Warmbler's SRM-100 according to ASTM D257.
• the molded article of the present invention has a volume resistivity ( ⁇ ⁇ cm) of 10 ⁇ 1 to 10 8 ⁇ ⁇ cm measured using MY40 manufactured by YOKOGAWA Co., Ltd. in accordance with ASTM D257.
• Cheil Industries AB03-CHA was used as g-ABS with an average particle diameter of 2,570 mm3.
• Cheil Industries AB03-CHT was used as g-ABS with an average particle diameter of 1,300 mm 3.
• Cheil Industries' CA03-AP-70 was used as a SAN having a weight average molecular weight of 95,000 g / mol.
• VGCF-X As a carbon nanotube having an average particle diameter of 5 to 30 nm and an average length of 1 to 50 ⁇ m, VGCF-X, a multi-walled carbon nanotube manufactured by ShowaDenko, was used.
• the mixing ratios of (A), (B) and (C) are represented by weight percent with respect to 100% by weight of (A), (B) and (C), and (D) is (A), (B) ) And (C) it is shown as a middle part with respect to 100 weight part of total.
• Izod impact strength (kgfcm / cm): measured in 1/8 "thickness at 23 °C according to ASTM D 256.
• volume resistivity ( ⁇ cm) It measured using MY40 by YOKOGAWA company based on ASTMD257.
• the rubber-modified aromatic vinyl graft copolymer (A) of the core-shell structure of the large particle size and the rubber-modified aromatic vinyl graft air of the core-shell structure of the small particle diameter included in the scope of the present invention In Example 1 using the copolymer (B), the aromatic vinyl copolymer (C) and the carbon nanotubes (D), the surface resistance was reduced according to the use of the carbon nanotubes (D), thereby improving the conductivity.
• a rubber-modified aromatic vinyl graft copolymer (A) having a large particle size core-shell structure and a rubber-modified aromatic vinyl graft copolymer (B) having a small particle size core-shell structure are used together and have a specific range of weight.
• An aromatic vinyl copolymer (C) having an average molecular weight was used to prevent a decrease in impact strength due to the use of carbon nanotubes (D).
• Comparative Example 1 without using carbon nanotubes (D) was too high surface resistance could not be measured
• Comparative Example 2 using an aromatic vinyl copolymer (C) having a large weight average molecular weight is conductive and Both impact strengths were reduced.
• Comparative Example 3 using a rubber-modified aromatic vinyl-based graft copolymer (B) having a small particle size core-shell structure, and a rubber-modified aromatic vinyl-based graphene having a core-shell structure having a small particle size, out of the content range of the present invention.
• Comparative Example 4 without using the copolymer (B) the impact strength was lowered.
• Comparative Example 5 used out of the range of the weight average molecular weight of the aromatic vinyl copolymer (C) both the conductivity and the impact strength were reduced.
• Example 1 included in the scope of the present invention was superior in volume resistance and coating efficiency compared to Comparative Examples 1 and 2 not included in the scope of the present invention.

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• 2013
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