KR100569329B1 - Compound for outer part of vehicle - Google Patents

Compound for outer part of vehicle Download PDF

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KR100569329B1
KR100569329B1 KR1020030072830A KR20030072830A KR100569329B1 KR 100569329 B1 KR100569329 B1 KR 100569329B1 KR 1020030072830 A KR1020030072830 A KR 1020030072830A KR 20030072830 A KR20030072830 A KR 20030072830A KR 100569329 B1 KR100569329 B1 KR 100569329B1
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weight
composition
hdpe
resistance
density polyethylene
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KR20050037610A (en
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나기식
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현대자동차주식회사
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/04—Homopolymers or copolymers of ethene
    • C08L23/06—Polyethene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R13/00—Elements for body-finishing, identifying, or decorating; Arrangements or adaptations for advertising purposes
    • 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
    • C08K3/34—Silicon-containing compounds
    • 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
    • C08K5/00—Use of organic ingredients
    • C08K5/0008—Organic ingredients according to more than one of the "one dot" groups of C08K5/01 - C08K5/59
    • C08K5/005—Stabilisers against oxidation, heat, light, ozone
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/10—Homopolymers or copolymers of propene
    • C08L23/12—Polypropene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/16—Elastomeric ethene-propene or ethene-propene-diene copolymers, e.g. EPR and EPDM rubbers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2201/00—Properties
    • C08L2201/08—Stabilised against heat, light or radiation or oxydation
    • 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
    • C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2207/00—Properties characterising the ingredient of the composition
    • C08L2207/06—Properties of polyethylene
    • C08L2207/062—HDPE

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

본 발명은 자동차용 외장재 조성물에 관한 것으로서, 더욱 상세하게는 머드가드(Mud guard) 또는 스프레쉬 휀더(Splash Fender)와 같은 외장 플라스틱 부품의 내스크래치성 및 내후성을 향상시킬 수 있도록 한 자동차용 외장재 조성물에 관한 것이다.The present invention relates to an automotive exterior composition, and more particularly, to an automotive exterior composition which can improve scratch resistance and weather resistance of exterior plastic parts such as mud guard or splash fender. It is about.

이를 위해, 본 발명은 고밀도 폴리에틸렌(HDPE) 80중량%, 폴리프로필렌(PP) 10중량%, 탈크 2∼4중량%, EPDM 3∼5중량%, 안정제 1∼2중량%, 가소제 1중량% 이하로 이루어진 것을 특징으로 하는 자동차용 외장재 조성물을 제공한다.To this end, the present invention is 80% by weight of high density polyethylene (HDPE), 10% by weight of polypropylene (PP), 2 to 4% by weight of talc, 3 to 5% by weight of EPDM, 1 to 2% by weight of stabilizer, 1% by weight of plasticizer It provides a vehicle exterior material composition comprising a.

자동차용 외장재 조성물, HDPE, 내스크래치성 및 내후성, 열변형 온도, 내충격강도, 머드가드, 스프레쉬 휀더Automotive exterior composition, HDPE, scratch and weather resistance, heat deflection temperature, impact resistance, mudguard, splash fender

Description

자동차용 외장재 조성물{Compound for outer part of vehicle}Exterior material composition for automobiles {Compound for outer part of vehicle}

본 발명은 자동차용 외장재 조성물에 관한 것으로서, 더욱 상세하게는 머드가드(Mud guard) 또는 스프레쉬 휀더(Splash Fender)와 같은 외장 플라스틱 부품의 내스크래치성 및 내후성을 향상시킬 수 있도록 한 자동차용 외장재 조성물에 관한 것이다.The present invention relates to an automotive exterior composition, and more particularly, to an automotive exterior composition which can improve scratch resistance and weather resistance of exterior plastic parts such as mud guard or splash fender. It is about.

통상적으로 머드 가드 및 스프레쉬 휀더는 대형 크럭의 대표적인 외장 플라스틱 부품으로서, 내열성 및 내한성 그리고 내후성이 우수해야 한다.Typically, mud guards and splash fenders are representative of large sized exterior plastic parts and should be excellent in heat and cold resistance and weather resistance.

대형트럭의 머드가드 및 스프레쉬 휀더용 재료로 사용되는 FRP의 경우 핸드 레이 업(hand lay up) 방법으로 제작하기 때문에 생산성이 떨어지고, 부품 제작시 냄새가 심하여 작업성을 떨어뜨리는 단점이 있다.FRP, which is used as a material for mudguards and splash fenders of large trucks, has a disadvantage in that productivity is reduced due to the hand lay-up method, and the workability is reduced due to a bad smell when manufacturing parts.

또한, FRP 재질을 이용하여 머드 가드 또는 스프레쉬 휀더가 일단 제작된 후에는 흑색 도장을 하기 때문에 스크래치(scratch)가 쉽게 생기게 되고 변색이 심하게 일어나는 문제점이 있다.In addition, since the mud guard or the spray fender using the FRP material is made black once, scratches are easily generated, and there is a problem in that discoloration occurs severely.

한편, SMC 재질의 경우에는 금형비가 고가이면서 상기 FRP 재질과 같이 스크 래치 발생 및 내후성에 문제점이 있다.On the other hand, in the case of the SMC material, the mold cost is expensive, there is a problem in the occurrence of the scratch and weather resistance, as in the FRP material.

본 발명은 상기와 같은 단점들을 감안하여 연구 개발된 것으로서, 원가절감, 금형비 절감, 경량화, 적용재료의 리사이클 가능 그리고 내스크래치성 및 내후성에서 우수한 HDPE(High Density Polyethylene)을 주성분으로 하는 자동차용 외장재 조성물을 제공하는데 그 목적이 있다.
The present invention has been researched and developed in view of the above drawbacks, cost reduction, mold cost reduction, light weight, the recycling of the application material possible and excellent scratch resistance and weather resistance of the automotive exterior material composition mainly composed of HDPE (High Density Polyethylene) The purpose is to provide.

상기한 목적을 달성하기 위한 본 발명은 고밀도 폴리에틸렌(HDPE) 80중량%, 폴리프로필렌(PP) 10중량%, 탈크 2∼4중량%, EPDM 3∼5중량%, 안정제 1∼2중량%, 가소제 1중량% 이하로 이루어진 것을 특징으로 하는 자동차용 외장재 조성물을 제공한다.The present invention for achieving the above object is high density polyethylene (HDPE) 80% by weight, polypropylene (PP) 10% by weight, talc 2-4% by weight, EPDM 3-5% by weight, stabilizer 1-2% by weight, plasticizer It provides an automotive exterior composition comprising 1% by weight or less.

바람직하게는, 본 발명의 외장재 조성물은 고밀도 폴리에틸렌(HDPE) 80중량%에 폴리프로필렌(PP) 10중량%, 탈크 3.5중량%, EPDM 4.5중량%, 안정제로서 히드록시 벤조피놀 0.5중량% 및 알킨 페놀 1중량%, 가소제(DOP/DOA) 0.5중량%로 이루어진 것을 특징으로 한다.Preferably, the exterior composition of the present invention comprises 80% by weight of high density polyethylene (HDPE), 10% by weight of polypropylene (PP), 3.5% by weight of talc, 4.5% by weight of EPDM, 0.5% by weight of hydroxy benzopinol and alkyne phenol as stabilizers. It is characterized by consisting of 1% by weight, 0.5% by weight of a plasticizer (DOP / DOA).

이하, 본 발명을 보다 상세히 설명한다.Hereinafter, the present invention will be described in more detail.

본 발명은 자동차용 외장재 특히, 대형트럭의 머드가드 또는 스프레쉬 휀더의 제작에 유용하게 적용할 수 있는 조성물을 제공하고자 한 것으로서, 고밀도 폴 리에틸렌(HDPE)을 주성분으로 하여, 폴리프로필렌(PP) 10중량%, 탈크 2∼4중량%, EPDM 3∼5중량%, 안정제 1∼2중량%, 가소제 1중량% 이하가 포함되어 이루어진 자동차용 외장재 조성물을 제공한다. The present invention is to provide a composition that can be usefully applied to the manufacture of automotive exterior materials, in particular, mudguards or splash fenders of large trucks, a high-density polyethylene (HDPE) as a main component, polypropylene (PP) Provided is an automotive exterior composition comprising 10% by weight, 2 to 4% by weight of talc, 3 to 5% by weight of EPDM, 1 to 2% by weight of stabilizer, and 1% by weight of plasticizer.

각 조성에 대한 함량 한정 이유는 다음과 같다.The reason for the content limitation for each composition is as follows.

1) 고밀도 폴리에틸렌(HDPE) 80중량% 및 폴리프로필렌(PP) 10중량%1) 80% by weight of high density polyethylene (HDPE) and 10% by weight of polypropylene (PP)

고밀도 폴리에틸렌 80중량%와 폴리프로필렌 10중량%를 벗어나게 되면, 강도와 충격강도가 저하되고, 90℃ 이상의 열변형 온도 확보가 불가능하다.When 80% by weight of high density polyethylene and 10% by weight of polypropylene deviate, the strength and impact strength are lowered, and it is impossible to secure a heat deformation temperature of 90 ° C or higher.

2) 탈크 2∼4중량%2) Talc 2-4 wt%

탈크 2중량% 미만이면 열변형 온도를 90℃ 이상으로 얻을 수 없으며, 4중량%를 초과하게 되면 친화성이 나빠져 수지에 잘 분산되지 않아 성형시 백화 현상이 발생하며, 또한 신율이 저하되어 성형성에 불리하다.If the talc is less than 2% by weight, the heat deformation temperature cannot be obtained above 90 ° C, and if it exceeds 4% by weight, the affinity deteriorates and the resin is not well dispersed in the resin. It is disadvantageous.

3) EPDM(Ethylene Propylene Diene Copolymer) 3∼5중량%3) EPDM (Ethylene Propylene Diene Copolymer) 3 ~ 5 wt%

EPDM 3중량% 미만이면 만족스런 내충격성(Izod 충격강도 40kg-cm/cm)을 얻을 수 없으며, 5중량%를 초과하면 열변형 온도가 85℃로 저하되는 현상이 발생한다.If the EPDM is less than 3% by weight, satisfactory impact resistance (Izod impact strength of 40kg-cm / cm) cannot be obtained. If the content is more than 5% by weight, the heat deformation temperature is lowered to 85 ° C.

4) 안정제 1∼2중량%4) Stabilizer 1-2 wt%

하한값일 경우 물성에 미치는 영향은 거의 없으나, 2중량%를 초과하면 기본 물성 및 열변형 온도가 교호작용에 의해 부분적으로 저하된다.If the lower limit value has little effect on the physical properties, but if it exceeds 2% by weight, the basic physical properties and the heat deformation temperature are partially lowered by the interaction.

5) 가소제 1중량% 이하5) Plasticizer 1 wt% or less

가소제 1중량%를 초과하면 소재의 연화 온도를 저하시켜 성형 수축율이 커지고, 성형 후에 변형이 발생하게 된다.When the plasticizer exceeds 1% by weight, the softening temperature of the raw material is lowered to increase the molding shrinkage ratio, and deformation occurs after molding.

이하, 본 발명을 실시예에 의하여 더욱 상세히 설명하고자 한다.Hereinafter, the present invention will be described in more detail with reference to Examples.

하기의 실시예는 오로지 본 발명을 보다 구체적으로 설명하기 위한 것으로, 이들 실시예에 의하여 본 발명의 범위가 한정되지 않는다는 것은 본 발명이 속하는 기술분야에서 통상의 지식을 가진 자에게 있어서 자명할 것이다.The following examples are only for illustrating the present invention in more detail, it will be apparent to those skilled in the art that the scope of the present invention is not limited by these examples.

실시예 및 시험예Examples and Test Examples

본 발명에 따른 실시예로서, 고밀도 폴리에틸렌(HDPE) 80중량%에 폴리프로필렌(PP) 10중량%, 탈크 3.5중량%, EPDM 4.5중량%, 안정제로서 히드록시 벤조피놀 0.5중량% 및 알킨 페놀 1중량%, 가소제(DOP/DOA) 0.5중량%를 혼합하여 자동차용 외장재 조성물을 제조하였다.In an embodiment according to the invention, 80% by weight of high density polyethylene (HDPE), 10% by weight of polypropylene (PP), 3.5% by weight of talc, 4.5% by weight of EPDM, 0.5% by weight of hydroxy benzopinol and 1% of alkyne phenol as stabilizers %, Plasticizer (DOP / DOA) 0.5% by weight was mixed to prepare a vehicle exterior material composition.

이렇게 제조된 자동차용 외장재 조성물을 이용하여 머드가드(Mud guard) 또는 스프레쉬 휀더(Splash Fender)와 같은 외장 플라스틱 부품을 성형 제작한 다음, 통상의 장비로 인장강도, Izod 충격강도, 열변형 온도, 치수 안정성, 내스크래치성 등을 측정하여 그 결과를 표 1에 나타내었다.Using the automotive exterior composition thus prepared, molded plastic parts such as mud guards or splash fenders are molded and then tensile strength, Izod impact strength, thermal deformation temperature, Dimensional stability, scratch resistance and the like were measured and the results are shown in Table 1.

비교예 1∼5 및 시험예Comparative Examples 1 to 5 and Test Examples

비교예 1은 고밀도 폴리에틸렌 80중량%에 폴리프로필렌 20중량%를 혼합하여 자동차용 외장재 조성물을 제조하였다.In Comparative Example 1, a vehicle exterior material composition was prepared by mixing 20% by weight of polypropylene with 80% by weight of high density polyethylene.

비교예 2는 고밀도 폴리에틸렌(HDPE) 80중량%에 폴리프로필렌(PP) 10중량%, 무기질 크레이 4중량%, EPDM 4중량%, 안정제로서 히드록시 벤조피놀 1중량% 및 알킨 페놀 0.5중량%, 가소제(DOP/DOA) 0.5중량%를 혼합하여 자동차용 외장재 조성물 을 제조하였다. In Comparative Example 2, 80% by weight of high density polyethylene (HDPE), 10% by weight of polypropylene (PP), 4% by weight of inorganic cray, 4% by weight of EPDM, 1% by weight of hydroxy benzopinol and 0.5% by weight of alkyne phenol as a stabilizer, a plasticizer (DOP / DOA) 0.5 wt% was mixed to prepare a vehicle exterior material composition.

비교예 3은 고밀도 폴리에틸렌 100중량%를 외장재 제작에 단독으로 사용하였다.In Comparative Example 3, 100% by weight of high density polyethylene was used alone for the exterior material.

비교예 4는 고밀도 폴리에틸렌(HDPE) 50중량%에 폴리프로필렌(PP) 40중량%, 무기질 크레이 3중량%, EPDM 5중량%, 안정제로서 히드록시 벤조피놀 1중량%, 가소제(DOP/DOA) 1중량%를 혼합하여 자동차용 외장재 조성물을 제조하였다. Comparative Example 4 is 50% by weight of high density polyethylene (HDPE) 40% by weight of polypropylene (PP), 3% by weight of inorganic crayfish, 5% by weight of EPDM, 1% by weight of hydroxy benzopinol as a stabilizer, plasticizer (DOP / DOA) 1 Mixing the weight percent to prepare a vehicle exterior material composition.

비교예 5는 폴리프로필렌(PP)만을 외장재 제작에 단독으로 사용하였다.In Comparative Example 5, only polypropylene (PP) was used alone for fabrication of the exterior material.

이와 같은 비교예 1내지 5의 조성을 사용하여 머드가드(Mud guard) 또는 스프레쉬 휀더(Splash Fender)와 같은 외장 플라스틱 부품을 성형 제작한 다음, 통상의 장비로 인장강도, Izod 충격강도, 열변형 온도, 치수 안정성, 내스크래치성 등을 측정하여 그 결과를 표 1에 나타내었다.Using the composition of Comparative Examples 1 to 5, molded plastic parts such as mud guards or splash fenders are molded, and then tensile strength, Izod impact strength, and heat deflection temperature using conventional equipment. , Dimensional stability, scratch resistance and the like were measured and the results are shown in Table 1.

Figure 112003038870946-pat00001
Figure 112003038870946-pat00001

위의 표 1에서 보는 바와 같이, 본 발명에 따른 실시예가 비교예들에 비하여 내충격성, 인장강도, 열변형 온도, 내마모성, 내스크래치성 등 모든 면에서 우수함을 알 수 있었다.As shown in Table 1 above, it can be seen that the embodiment according to the present invention is excellent in all aspects, such as impact resistance, tensile strength, heat deformation temperature, wear resistance, scratch resistance, compared to the comparative examples.

비교예 1에 따르면, 상기 고밀도 폴리에틸렌(HDPE)은 자체 강성은 우수하나 내충격성(Izod 충격강도 20kg-cm/cm)이 취약하고 열변형 온도(80℃)가 낮아 일반 플라스틱에 비하여 뒤지는 결점이 있다. 이러한 고밀도 폴리에틸렌(HDPE)의 결점을 보완하기 위하여 폴리프로필렌 20중량%를 혼합하면 강도는 유지되나, 내충격성(Izod 충격강도 15kg-cm/cm)이 불리해지는 반면에, 열변형 온도(90℃)는 호전되어 치수안정성이 다소 개선되는 효과를 얻을 수 있다. According to Comparative Example 1, the high-density polyethylene (HDPE) is excellent in its own rigidity, but the impact resistance (Izod impact strength 20kg-cm / cm) is weak and the heat deformation temperature (80 ℃) is low compared to the general plastics . When 20% by weight of polypropylene is mixed to compensate for the defect of the high density polyethylene (HDPE), the strength is maintained, but the impact resistance (Izod impact strength 15kg-cm / cm) is disadvantageous, while the heat deformation temperature (90 ° C) Can be improved and the dimensional stability is somewhat improved.

비교예 2에 따르면 외장재의 강성은 다소 떨어지는 경향이 있을 수 있으나, 내충격성(Izod 충격강도 40kg-cm/cm)이 향상되고, 열변형 온도는 90℃보다 더 이상 개선되지 않았으며, HDPE에 비하여 내마모성 및 내스크래치성이 다소 불리한 점이 있었다.According to Comparative Example 2, the stiffness of the exterior material may tend to be somewhat reduced, but the impact resistance (Izod impact strength 40kg-cm / cm) is improved, and the heat deformation temperature is no longer improved than 90 ° C., compared to HDPE. Wear resistance and scratch resistance were somewhat disadvantageous.

비교예 3과 비교예 4에 따르면, 내충격성(Izod 충격강도 20kg-cm/cm)이 떨어지고, 열변형 온도는 80℃보다 더 이상 개선되지 않았다.According to Comparative Example 3 and Comparative Example 4, the impact resistance (Izod impact strength 20kg-cm / cm) fell, and the heat deformation temperature did not improve more than 80 ℃.

비교예 5에 의하면, 폴리프로필렌만을 사용하여 외장재를 제조한 경우로서, 열변형 온도는 100℃로 우수하지만, 내충격성(Izod 충격강도 20kg-cm/cm)이 크게 떨어지는 단점이 있었다. According to Comparative Example 5, when the packaging material was manufactured using only polypropylene, the heat deformation temperature was excellent at 100 ° C., but the impact resistance (Izod impact strength 20 kg-cm / cm) was greatly reduced.

반면에, 본 발명에 따른 실시예는 고밀도 폴리에틸렌(HDPE)과 동등한 강성을 유지하면서 내충격성(Izod 충격강도 58kg-cm/cm)이 크게 향상되고, 열변형 온도는 98℃까지 향상되었으며, 특히 내마모성 및 내스크래치성도 현저하게 향상되었으며, 성형성도 HDPE 또는 PP 단독보다 우수함을 알 수 있었다.On the other hand, the embodiment according to the present invention is greatly improved in impact resistance (Izod impact strength 58kg-cm / cm) while maintaining the same rigidity as the high-density polyethylene (HDPE), heat deformation temperature up to 98 ℃, in particular wear resistance And scratch resistance was also significantly improved, it was found that the moldability is superior to HDPE or PP alone.

이상에서 본 바와 같이, 본 발명에 따른 자동차용 외장재 조성물에 의하면, 내스크래치성 및 내후성 그리고 성형성이 우수하고, 내충격성 및 높은 열변형 온도를 보유함에 따라, 머드가드(Mud guard) 또는 스프레쉬 휀더(Splash Fender)와 같은 외장 플라스틱 부품에 유용하게 적용할 수 있다.As described above, according to the automotive exterior composition according to the present invention, as it has excellent scratch resistance and weather resistance and moldability, and has impact resistance and high heat deformation temperature, mud guard or splash It is useful for exterior plastic parts such as splash fenders.

Claims (2)

고밀도 폴리에틸렌(HDPE) 80중량%, 폴리프로필렌(PP) 10중량%, 탈크 2∼4중량%, EPDM 3∼5중량%, 안정제 1∼2중량%, 가소제 1중량% 이하로 이루어진 것을 특징으로 하는 자동차용 외장재 조성물.80% by weight of high density polyethylene (HDPE), 10% by weight of polypropylene (PP), 2 to 4% by weight of talc, 3 to 5% by weight of EPDM, 1 to 2% by weight of stabilizer, and 1% by weight of plasticizer. Automobile exterior material composition. 청구항 1에 있어서, 고밀도 폴리에틸렌(HDPE) 80중량%, 폴리프로필렌(PP) 10중량%, 탈크 3.5중량%, EPDM 4.5중량%, 안정제로서 히드록시 벤조피놀 0.5중량% 및 알킨 페놀 1중량%, 가소제(DOP/DOA) 0.5중량%로 이루어진 것을 특징으로 하는 자동차용 외장재 조성물.The method of claim 1, wherein 80% by weight of high density polyethylene (HDPE), 10% by weight of polypropylene (PP), 3.5% by weight of talc, 4.5% by weight of EPDM, 0.5% by weight of hydroxy benzopinol and 1% by weight of alkyne phenol, plasticizer as stabilizer (DOP / DOA) Exterior composition for automobiles, characterized in that consisting of 0.5% by weight.
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