KR101773646B1 - Thermoplastic resin composition for outer pannel of automobile - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thermoplastic resin composition for a car body shell plate, and more particularly, to a thermoplastic resin composition for a car body shell plate having electrical conductivity and high heat resistance by reinforcing carbon nanotubes in a thermoplastic resin.
In the present invention, by reinforcing the carbon nanotubes in the thermoplastic resin composition used for the outer shell of the vehicle body, a lightweight product having excellent physical properties such as electrical conductivity and heat resistance can be produced. As a result, it is possible to replace the metal material used for the body panel of automobiles with the thermoplastic resin composition. As a result, the energy consumption efficiency through weight reduction can be increased and injection molding can be carried out, .

Description

TECHNICAL FIELD [0001] The present invention relates to a thermoplastic resin composition for an outer panel of a vehicle body,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thermoplastic resin composition for a car body shell plate, and more particularly, to a thermoplastic resin composition for a car body shell plate having electrical conductivity and high heat resistance by reinforcing carbon nanotubes in a thermoplastic resin.

Generally, the outer shell of a vehicle body is made of a metal material, and the metal material is in a disadvantage relative to the plastic in terms of processing and economy. Particularly in the case of automobiles, the outer shell of a metal body is designated as a light weight, Has been known as a technique which is very difficult in terms of physical properties, for example, electrical conductivity and heat resistance.

Fiber reinforcement plastic (FRP) is known as a resin composition that can be used for the outer shell of a vehicle body, but the physical properties of the fiber-reinforced thermoplastic resin are determined depending on the type and content of resins, reinforcing materials, Sufficient electric conductivity and heat resistance can not be ensured for use in the outer shell of a vehicle body, so that it has not been put to practical use.

A problem to be solved by the present invention is to provide a thermoplastic resin composition for a car body shell which provides sufficient electrical conductivity and heat resistance.

Another object to be solved by the present invention is to provide a body sheath obtained by employing the thermoplastic resin composition for a vehicle body sheathing.

According to an aspect of the present invention,

100 parts by weight of a thermoplastic resin;

1 to 10 parts by weight of carbon nanotubes; And

And 1 to 15 parts by weight of an impact modifier.

According to another aspect of the present invention,

There is provided a vehicle body sheath obtained by employing the above-mentioned thermoplastic resin composition for a vehicle body sheathing.

In the present invention, by reinforcing the carbon nanotubes in the thermoplastic resin composition used for the outer shell of the vehicle body, a lightweight product having excellent physical properties such as electrical conductivity and heat resistance can be produced. As a result, it is possible to replace the metal material used for the body panel of automobiles with the thermoplastic resin composition. As a result, the energy consumption efficiency through weight reduction can be increased and injection molding can be carried out, .

BRIEF DESCRIPTION OF THE DRAWINGS The present invention is capable of various modifications and various embodiments, and specific embodiments are illustrated in the drawings and described in detail in the detailed description. It is to be understood, however, that the invention is not to be limited to the specific embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

Hereinafter, the etchant composition of a copper / molybdenum-containing film according to an embodiment of the present invention will be described in more detail.

The thermoplastic resin composition for a body panel according to the present invention comprises 100 parts by weight of a thermoplastic resin; 1 to 10 parts by weight of carbon nanotubes; And 1 to 15 parts by weight of an impact reinforcement.

In order to replace the metal material used for the outer shell of a vehicle such as an automobile or a bike with plastic, electrical conductivity and high heat resistance must be secured. That is, the automobile or the bike is required to have an electric conductivity basically because it carries the grounding function of the vehicle body, and it is also required to have high heat resistance because it is exposed to the automobile painting process or the high temperature outside. In the present invention, by reinforcing carbon nanotubes in the thermoplastic resin composition, it is possible to impart electrical conductivity and high heat resistance. Particularly, when the carbon nanotubes are reinforced in the thermoplastic resin, electrical conductivity is generated by the carbon nanotubes having high conductivity. In addition, since the fine carbon nanotubes serve as a nucleating agent for causing crystal growth, the ratio of the amorphous regions in the resin And the degree of crystallization is increased. This results in an increase in the heat deflection temperature, thereby increasing the heat resistance.

The thermoplastic resin used for the thermoplastic resin composition for the body panel may be any resin as long as it is used in the related art. Examples of the thermoplastic resin include polycarbonate resin, polypropylene resin, polyamide resin, aramid resin, aromatic polyester resin, polyolefin resin , A polyester carbonate resin, a polyphenylene oxide resin, a polyphenylene sulfide resin, a polysulfone resin, a polyether sulfone resin, a polyarylene resin, a cycloolefin resin, a polyetherimide resin, a polyacetal resin, A resin, a polyketone resin, a polyether ketone resin, a polyether ether ketone resin, a polyaryl ketone resin, a polyether nitrile resin, a liquid crystal resin, a polybenzimidazole resin, a polyparabanic acid resin, an aromatic alkenyl compound, , Acrylic acid esters, and vinyl cyanide , A vinyl-based polymer or copolymer resin obtained by polymerization or copolymerization of one or more vinyl monomers selected from the group consisting of vinyl aromatic monomers, aromatic vinyl monomers, aromatic vinyl monomers, aromatic vinyl monomers, Vinylidene chloride-vinylidene chloride copolymer resin, vinylidene cyanide-ethylene-diene-propylene (EPDM) -aromatic alkenyl compound copolymer resin, polyolefin, vinyl chloride resin, chlorinated vinyl chloride resin At least one selected from the group consisting of The specific types of these resins are well known in the art, and examples that can be used in the compositions of the present invention can be appropriately selected by those skilled in the art.

The polyolefin resin may be, for example, polypropylene, polyethylene, polybutylene, and poly (4-methyl-1-pentene), and combinations thereof, but is not limited thereto. In one embodiment, the polyolefins include polypropylene homopolymers (e.g., atactic polypropylene, isotactic polypropylene, and syndiotactic polypropylene), polypropylene copolymers (e.g., For example, polypropylene random copolymers), and mixtures thereof. Suitable polypropylene copolymers include but are not limited to the presence of comonomers selected from the group consisting of ethylene, but-1-ene (i.e., 1-butene), and hex-1-ene Lt; RTI ID = 0.0 > of propylene. ≪ / RTI > In such polypropylene random copolymers, the comonomer may be present in any suitable amount, but is typically present in an amount of up to about 10 wt% (e.g., from about 1 to about 7 wt%, or from about 1 to about 4.5 wt%) Can exist.

The polyester resin is a homopolyester or a copolymer polyester which is a polycondensation product of a dicarboxylic acid component skeleton and a diol component skeleton. Examples of the homopolyester include polyethylene terephthalate, polypropylene terephthalate, polybutylene terephthalate, polyethylene-2,6-naphthalate, poly-1,4-cyclohexanedimethylene terephthalate, . Particularly, since polyethylene terephthalate is inexpensive, it can be used in a wide variety of applications. The copolymer polyester is defined as a polycondensate comprising at least three or more components selected from the following components having a dicarboxylic acid skeleton and a component having a diol skeleton. Examples of the component having a dicarboxylic acid skeleton include terephthalic acid, isophthalic acid, phthalic acid, 1,4-naphthalene dicarboxylic acid, 1,5-naphthalene dicarboxylic acid, 2,6-naphthalene dicarboxylic acid, -Diphenyl dicarboxylic acid, 4,4'-diphenylsulfone dicarboxylic acid, adipic acid, sebacic acid, dimeric acid, cyclohexanedicarboxylic acid and ester derivatives thereof. Examples of the component having a glycol skeleton include ethylene glycol, 1,2-propanediol, 1,3-butanediol, 1,4-butanediol, 1,5-pentanediol, diethylene glycol, polyalkylene glycol, 2,2- 4'-p-hydroxyethoxyphenyl) propane, isosorbate, 1,4-cyclohexanedimethanol, spiroglycol and the like.

As the polyamide resin, nylon resin, nylon copolymer resin, and mixtures thereof can be used. Examples of the nylon resin include polyamide-6 (nylon 6) obtained by ring-opening polymerization of a lactam such as? -Caprolactam or? -Dodecaractam commonly known in the art; Nylon polymers obtained from amino acids such as aminocaproic acid, 11-amino undecanoic acid, and 12-aminododecanoic acid; But are not limited to, ethylenediamine, tetramethylenediamine, hexamethylenediamine, undecamethylenediamine, dodecamethylenediamine, 2,2,4-trimethylhexamethylenediamine, 2,4,4-trimethylhexamethylenediamine, , Metaxylenediamine, para-xylenediamine, 1,3-bisaminomethylcyclohexane, 1,4-bisaminomethylcyclohexane, 1-amino-3-aminomethyl-3,5,5-trimethylcyclohexane, bis Aminocyclohexyl) methane, bis (4-aminocyclohexyl) propane, bis (aminopropyl) piperazine, aminoethylpiperidine, etc. Alicyclic or aromatic dicarboxylic acids such as adipic acid, sebacic acid, azelaic acid, terephthalic acid, 2-chloroterephthalic acid and 2-methylterephthalic acid, etc. A nylon polymer obtainable from the polymerization of Copolymers or mixtures thereof may be used. Examples of the nylon copolymer include copolymers of polycaprolactam (nylon 6) and polyhexamethylene sebacamide (nylon 6,10), copolymers of polycaprolactam (nylon 6) and polyhexamethyleneadipamide (nylon 66) And copolymers of polycaprolactam (nylon 6) and polylauryl lactam (nylon 12).

The polycarbonate resin may be prepared by reacting a diphenol with phosgene, a halogen formate, a carbonic ester, or a combination thereof. Specific examples of the diphenols include hydroquinone, resorcinol, 4,4'-dihydroxydiphenyl, 2,2-bis (4-hydroxyphenyl) propane (also referred to as bisphenol- (4-hydroxyphenyl) methane, 1,1-bis (4-hydroxyphenyl) cyclohexane, 2,2-bis Bis (3,5-dimethyl-4-hydroxyphenyl) propane, 2,2-bis Bis (4-hydroxyphenyl) sulfone, bis (4-hydroxyphenyl) ketone, bis (4-hydroxyphenyl) Ether, and the like. Of these, 2,2-bis (4-hydroxyphenyl) propane, 2,2-bis (3,5-dichloro-4-hydroxyphenyl) propane or 1,1- Cyclohexane may be used, and more preferably 2,2-bis (4-hydroxyphenyl) propane may be used.

The polycarbonate resin may be a mixture of copolymers prepared from two or more diphenols. The polycarbonate resin may be a linear polycarbonate resin, a branched polycarbonate resin, or a polyester carbonate copolymer resin.

Examples of the linear polycarbonate resin include a bisphenol-A polycarbonate resin and the like. Examples of the branched polycarbonate resin include those prepared by reacting a polyfunctional aromatic compound such as trimellitic anhydride, trimellitic acid and the like with a diphenol and a carbonate. The polyfunctional aromatic compound may be contained in an amount of 0.05 to 2 mol% based on the total amount of the branched polycarbonate resin. Examples of the polyester carbonate copolymer resin include those prepared by reacting a bifunctional carboxylic acid with a diphenol and a carbonate. As the carbonate, diaryl carbonate such as diphenyl carbonate, ethylene carbonate and the like can be used.

Examples of the cycloolefin-based polymer include a norbornene polymer, a monocyclic olefin polymer, a cyclic conjugated diene polymer, a vinyl alicyclic hydrocarbon polymer, and hydrides thereof. Specific examples thereof include APEL (an ethylene-cycloolefin copolymer produced by Mitsui Chemicals, Inc.), Aton (a norbornene-based polymer manufactured by JSR Corporation), and Zeonoa (a norbornene-based polymer manufactured by Nippon Zeon).

The polyphenylene oxide resin is also referred to as polyphenylene ether, and has a structure in which -O- is bonded to a phenylene group as a repeating unit. The phenylene group may have various substituents such as a methyl group, an ethyl group, a halogen group, a hydroxy group and the like.

The thermoplastic resin according to the present invention may preferably use an alloy of polyphenylene oxide and polyamide.

According to one aspect, a carbon nanotube (CNT) used in the thermoplastic resin composition is a material in which carbon atoms arranged in a hexagonal shape form a tube, and has a diameter of about 1 to 100 nm. Carbon nanotubes exhibit nonconductive, conductive or semiconducting properties due to their inherent chirality. The carbon atoms are connected by a strong covalent bond. The tensile strength of the carbon nanotubes is about 100 times greater than that of steel. The carbon nanotubes are excellent in flexibility and elasticity, It is chemically stable.

Examples of such carbon nanotubes include single-walled carbon nanotubes (SWCNTs) composed of one layer and having a diameter of about 1 nm, double-walled carbon nanotubes composed of two layers and having a diameter of about 1.4 to 3 nm There is a multi-walled carbon nanotube (MWCNT) having a diameter of about 5 to 100 nm consisting of a plurality of layers of a double-walled carbon nanotube (DWCNT) Can be used without any particular limitation.

The term " bundle " used in the present invention refers to a bundle or a rope shape in which a plurality of carbon nanotubes are arranged or intertwined in parallel, unless otherwise specified. The term 'non-bundle or entangled type' means a form without any uniform shape such as a bundle or a rope shape.

The bundle-type carbon nanotube basically has a shape in which a plurality of carbon nanotube strands are bundled together to form a bundle, and the plurality of strands have a shape of a straight line, a curved line, or a mixture thereof. The bundle-type carbon nanotubes may also have a linear, curvilinear or mixed form thereof. According to one embodiment, such a bundle-type carbon nanotube may have a thickness of 50 nm to 100 탆.

According to one embodiment, the average diameter of the carbon nanotube strands may be, for example, 1 nm to 20 nm.

The bundle-type carbon nanotubes used in the composition may have a length of about 1 탆 or more. Carbon nanotubes in the form of a bundle having such a range of lengths are more advantageous in improving the conductivity of the thermoplastic resin. Since the carbon nanotubes have a network structure in a matrix of a thermoplastic resin, carbon nanotubes having a longer length are more advantageous in forming such a network, and as a result, the frequency of inter-network contact is reduced, Thereby contributing to an increase in conductivity.

In addition, the carbon nanotubes having such a microstructure serve as a nucleating agent for inducing crystal growth in the resin, so that the ratio of the amorphous region can be reduced. As a result, it is possible to improve the degree of crystallization of the resin and increase the heat resistance so as to induce an increase in the heat distortion temperature.

The bundle-type carbon nanotubes used in the composition have a relatively high bulk density, which may be more advantageous for improving the conductivity of the thermoplastic resin composition. The bulk density of the carbon nanotubes may range from 80 to 250 kg / m ³ , for example, 100 to 220 kg / m ³ .

As used herein, the term "bulk density" means the apparent density of the carbon nanotubes in the raw material state, and the weight of the carbon nanotubes can be expressed by a value divided by the volume.

According to one embodiment, the bundle-type carbon nanotube may be used in an amount of 1 to 10 parts by weight, or 1 to 5 parts by weight based on 100 parts by weight of the thermoplastic resin. In this range, sufficient conductivity can be obtained while maintaining mechanical properties.

According to one aspect, the thermoplastic resin composition includes an impact reinforcing material, and natural and synthetic polymer materials that are elastic materials at room temperature may be used as the impact reinforcing material. The impact stiffener may comprise one or two alkenyl aromatic blocks A (blocks with alkenyl aromatic repeat units) which are alkenyl aromatic repeat units, for example typically styrene blocks, and rubber blocks B, typically isoprene or butadiene blocks ≪ / RTI > and an ABA triblock copolymer. The butadiene block may be partially or fully hydrogenated. Mixtures of these diblock and triblock copolymers may also be used in conjunction with a mixture of a non-hydrogenated copolymer, a partially hydrogenated copolymer, a fully hydrogenated copolymer, and combinations of two or more thereof.

AB and ABA block copolymers include but are not limited to polystyrene-polybutadiene, polystyrene-poly (ethylene-propylene), polystyrene-polyisoprene, poly SBS), polystyrene-poly (ethylene-propylene) -polystyrene, polystyrene-poly (ethylene-butylene) -polystyrene, polystyrene-polyisoprene-polystyrene, poly ), Polystyrene-poly (ethylene-propylene-styrene) -polystyrene, and the like. A mixture of the block copolymers may be used.

In one embodiment, the impact stiffener comprises polystyrene-poly (ethylene-butylene) -polystyrene, polystyrene-poly (ethylene-propylene), or mixtures thereof.

Another type of impact reinforcement essentially comprises no alkenyl aromatic repeat units and includes one or more moieties selected from the group consisting of carboxylic acid, anhydride, epoxy, oxazoline, and orthoester. Essentially not including is defined as having an alkenyl aromatic unit present in an amount of less than 5% by weight, more specifically less than 3% by weight and more specifically less than 2% by weight, based on the total weight of the block copolymer. do. If the impact reinforcement comprises a carboxylic acid moiety, the carboxylic acid moiety may be neutralized with an ion of a metal, such as zinc or sodium. The impact modifier may be an alkylene-alkyl (meth) acrylate copolymer, the alkylene group may have from 2 to 6 carbon atoms, and the alkyl group of the alkyl (meth) acrylate has from 1 to 8 carbon atoms . Polymers of this type can be prepared by copolymerizing an olefin such as ethylene and / or propylene with various (meth) acrylate monomers and / or various maleic acid based monomers. The term (meth) acrylate refers to both acrylates and the corresponding methacrylate equivalents. The term (meth) acrylate monomer includes not only alkyl (meth) acrylate monomers, but also various (meth) acrylate monomers containing one or more of the reactive moieties mentioned above.

In one embodiment, the copolymer comprises ethylene, propylene, octene or a mixture of ethylene and propylene, a mixture of ethylene and octene as the alkylene component; (I.e., carboxylic acid, anhydride, epoxy) with butyl acrylate, hexyl acrylate, or propyl acrylate and the corresponding alkyl (methyl) acrylate for the alkyl (meth) acrylate monomer component Derived from acrylic acid, maleic anhydride, glycidyl methacrylate or a combination thereof as monomers.

The above-described impact reinforcements may be used alone or in combination.

According to one embodiment, the thermoplastic resin composition may contain a combination of an impact reinforcement or an impact reinforcement in an amount of 1 to 15 parts by weight. Within this range, the impact modifier may be present in an amount of at least 1.5 parts by weight, more particularly at least 2 parts by weight, or more particularly at least 4 parts by weight. Also within this range, the impact modifier may be present in an amount of up to 13 parts by weight, more specifically up to 12 parts by weight, or even more specifically up to 10 parts by weight. The weight portion is based on 100 parts by weight of the thermoplastic resin in the thermoplastic composition.

According to one embodiment, the thermoplastic resin composition is at least one selected from the group consisting of a flame retardant, a flame retardant, a lubricant, a plasticizer, a heat stabilizer, a dripping inhibitor, an antioxidant, a compatibilizer, a light stabilizer, a pigment, a dye, And may be used in an amount of 0.1 to 10 parts by weight based on 100 parts by weight of the thermoplastic resin. The specific types of these additives are well known in the art, and examples that can be used in the compositions of the present invention can be appropriately selected by those skilled in the art.

According to one aspect, the method for producing the thermoplastic resin composition is not particularly limited. However, the raw material mixture may be supplied to a commonly known melt mixer such as a single shaft or a biaxial extruder, a Banbury mixer, a kneader, , Or a method of kneading at a temperature of 200 to 400 ° C.

The mixing order of the raw materials is not particularly limited and the thermoplastic resin, the carbon nanotubes and the impact reinforcing material described above, and the additives, if necessary, are blended in advance, and then the single-screw or twin-screw extruder , A method of removing the solvent after mixing in a solution, and the like are used. Of these, from the viewpoint of productivity, a method of homogeneously melt-kneading with a single-screw or twin-screw extruder is preferred. In particular, a method of uniformly melt-kneading at a melting point or higher of the thermoplastic resin using a twin screw extruder is preferably used.

Examples of the kneading method include a method of collectively kneading components such as a thermoplastic resin, a carbon nanotube, and an impact reinforcement, a resin composition (master pellet) containing a high concentration of carbon nanotubes and an impact reinforcement in a thermoplastic resin, Next, a method of melting and kneading the carbon nanotubes, the impact reinforcing material or the thermoplastic resin so as to have a predetermined concentration (master pellet method), and the like, and any kneading method may be used. As another method, a thermoplastic resin and other additives necessary for suppressing the breakage of the carbon nanotube and / or the impact reinforcement are introduced from the extruder side, and the carbon nanotube and / or the impact reinforcement are used by using a side feeder To the extruder to prepare a thermoplastic resin composition is preferably used.

The composite having the form of pellets or the like can be produced through the above kneading method.

According to one embodiment, the length of the carbon nanotubes used as the raw material in the composition can be measured using a scanning electron microscope (SEM) or a transmission electron microscope (TEM) photograph. That is, after photographs of powdered carbon nanotubes as a raw material are obtained through these measuring devices, they are analyzed through an image analyzer, for example, Scandium 5.1 (Olympus soft Imaging Solutions GmbH, Germany) Can be obtained. In the case of the carbon nanotubes contained in the composition, the resin solids are dissolved in an organic solvent such as acetone, ethanol, n-hexane, chloroform, p-xylene, 1-butanol, petroleum ether, 1,2,4-trichloro Benzene, and dodecane in a predetermined concentration, and then the result of measurement by SEM or TEM using this dispersion is analyzed using the image analyzer to obtain an average length and a distribution state.

The composite obtained by the above method has no problem in the production process and secondary processability as well as the mechanical strength is not lowered and a composite having electrical conductivity and high heat resistance can be obtained by adding an impact stiffener together with a small amount of carbon nanotubes .

The resin composition or composite according to one embodiment can be molded by any known method such as injection molding, extrusion molding, blow molding, press molding, and spinning, and can be processed into various molded articles. The molded article can be used as an injection molded article, an extrusion molded article, and the like.

The resin composition can be used for producing a molded article having various shapes, for example, a shell of a vehicle body or a bike. The outer shell of such a body may have the form of a door, a bonnet, a top plate, a door, a trunk, and a pendant of a vehicle body.

Hereinafter, the present invention will be described in detail with reference to Examples and Comparative Examples, but it should be understood by those skilled in the art that the present invention is not limited thereto and is only illustrative of the present invention in more detail.

Example

In the following examples and comparative examples, the abbreviations refer to the following:

≪ PO / PAA: polyphenylene oxide / polyamide alloy >

≪ SBS: styrene-butadiene-styrene copolymer resin >

<MAH-EOR: maleic anhydride-ethylene octene copolymer>

<CNT: Carbon nanotube>

Examples 1 to 5 and Comparative Example 1

First, the components listed in Table 1 were blended in a blender for 5 minutes according to the content ratio, and then extruded using a twin screw extruder. Specimens for the measurement of physical properties were prepared using an injection machine.

division Comparative Example 1 Example 1 Example 2 Example 3 Example 4 Example 5 PO / PAA (%) 94 93 92 91 90 90 SBS (%) 6 6 6 6 6 - MAH-EOR (%) - - - - - 6 CNT (%) 0 One 2 3 4 4

Experimental Example

The specimens prepared in Examples 1 to 5 and Comparative Example 1 were tested by the following test methods, and the results are shown in Table 2 below.

* Volume resistivity: A 100 mm x 100 mm x 3 mm square specimen was measured at room temperature using a Quadtech 1865 Megohmmeter / IR tester according to ASTM D257.

Heat Deflection Temperature (HDT): Measured according to ASTM D648 at a load of 18.6 kgf.

division Comparative Example 1 Example 1 Example 2 Example 3 Example 4 Example 5 Volume resistance
(ohm · cm) > 10 ¹⁵ > 10 ¹⁵ > 10 ¹⁴ > 10 ¹³ 10 ¹² ~ 10 ¹³ 10 ¹² ~ 10 ¹³ HDT (° C) > 185 > 185 > 191 > 193 > 196 > 200

As shown in Table 2, in Examples 1 to 5 of the present invention, it can be seen that as the content of the carbon nanotubes serving as the nucleating agent increases, the heat distortion temperature (HDT) increases and the volume resistance decreases. From these results, it can be seen that the plastic as the nonconductor is made conductive. In addition, it can be seen that the heat distortion temperature is the highest in Example 5 using EOH-MOR as an impact reinforcing material, so that heat resistance superior to SBS can be secured.

While the present invention has been particularly shown and described with reference to specific embodiments thereof, those skilled in the art will appreciate that such specific embodiments are merely preferred embodiments and that the scope of the present invention is not limited thereby. something to do. It is therefore intended that the scope of the invention be defined by the claims appended hereto and their equivalents.

Claims (17)

100 parts by weight of a thermoplastic resin;
1 to 10 parts by weight of carbon nanotubes; And
1 to 15 parts by weight of an impact modifier,
Wherein the thermoplastic resin is an alloy of polyphenylene oxide and polyamide, and the impact reinforcing material comprises a maleic anhydride-ethylene octene copolymer. The method according to claim 1,
Wherein the carbon nanotube is a nucleating agent causing crystal growth. delete delete The method according to claim 1,
Wherein the carbon nanotubes are of the bundle type or non-bundle type. delete The method according to claim 1,
Wherein the carbon nanotubes have a length of 1 占 퐉 or more. The method according to claim 1,
Wherein the carbon nanotubes include a network structure in the matrix of the thermoplastic resin. delete delete delete delete A thermoplastic resin for outer shell of a body panel obtained from the thermoplastic resin composition according to any one of claims 1, 2, 5, 7, and 8. A molded article obtained by processing the thermoplastic resin composition according to any one of claims 1, 2, 5, 7, and 8. 15. The method of claim 14,
Wherein the processing step is an extrusion step, an injection step, or an extrusion and injection step. A car body outer plate obtained by processing the thermoplastic resin composition according to any one of claims 1, 2, 5, 7, and 8. 17. The method of claim 16,
Wherein the vehicle body sheathing is a door, a bonnet, an upper plate, a trunk, or a pendulum of a vehicle body.