KR100762064B1 - Polyolefin resin composition for automobile wheel cover - Google Patents
Polyolefin resin composition for automobile wheel cover Download PDFInfo
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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
- C08L23/10—Homopolymers or copolymers of propene
- C08L23/14—Copolymers of propene
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B7/00—Wheel cover discs, rings, or the like, for ornamenting, protecting, venting, or obscuring, wholly or in part, the wheel body, rim, hub, or tyre sidewall, e.g. wheel cover discs, wheel cover discs with cooling fins
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- 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
- C08K7/28—Glass
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
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- 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
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- 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
- C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
- C08K2003/3045—Sulfates
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
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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
- 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
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Abstract
본 발명은 자동차 휠커버용 폴리올레핀 수지조성물에 관한 것으로, 보다 상세하게는 초고결정성 올레핀계 수지 35~75중량%, 무늬점도(ML1+4(100℃))가 10~100인 폴리올레핀계 엘라스토머 수지 3-25중량%, 불포화 카르본산 또는 그 무수물을 그라프트한 변성폴리프로필렌에 의해 표면처리된 다공성 유리구정(Glass Beads) 5~15중량% 및 평균입경이 1㎛이하인 황산바륨 5~15중량%로 이루어진 것을 특징으로 하는 자동차 휠커버용 폴리올레핀 수지조성물에 관한 것이며, 본 발명에 의해 자동차 휠커버에 적용할 수 있는 강도, 내충격성, 내열성 및 강성을 가지며, 특히 웰드라인 발생 부위에 돌출현상이 발생하지 않고 경량화가 가능한 자동차 휠커버용 폴리올레핀 수지조성물을 제공할 수 있다.The present invention relates to a polyolefin resin composition for automobile wheel covers, and more particularly, to polyolefin-based elastomer resin 3 having an ultra-crystalline olefin resin 35 to 75% by weight and a pattern viscosity (ML1 + 4 (100 ° C.)) of 10 to 100. -25 wt%, 5-15 wt% of porous glass beads surface-treated with modified polypropylene grafted with unsaturated carboxylic acid or its anhydride and 5-15 wt% of barium sulfate having an average particle diameter of 1 μm or less The present invention relates to a polyolefin resin composition for automobile wheel covers, which has a strength, impact resistance, heat resistance, and rigidity applicable to automobile wheel covers according to the present invention, and in particular, does not cause protrusions at the weld line generation site and is light in weight. It is possible to provide a polyolefin resin composition for automobile wheel cover.
자동차 휠커버용, 폴리올레핀, 수지조성물, 다공성 유리구정, 황산바륨For automobile wheel cover, polyolefin, resin composition, porous glass sphere, barium sulfate
Description
본 발명은 자동차 휠커버용 폴리올레핀 수지조성물에 관한 것으로, 보다 상세하게는 자동차 휠커버에 적용할 수 있는 강도, 내충격성, 내열성 및 강성을 가지며, 특히 웰드라인 발생 부위에 돌출현상이 발생하지 않으고, 종래의 기술 보다 경량화가 가능한 자동차 휠커버용 폴리올레핀 수지조성물에 관한 것이다.The present invention relates to a polyolefin resin composition for automobile wheel covers, and more particularly, has strength, impact resistance, heat resistance and rigidity that can be applied to automobile wheel covers, and in particular, protrusions do not occur at weld line generation sites. The present invention relates to a polyolefin resin composition for a vehicle wheel cover which can be lighter than the technology of the present invention.
폴리프로필렌은 비교적 저렴한 가격, 경량화 및 기계적 강도 등이 우수하여, 각종 분야에 폭넓게 사용되고 있다. 그러나 내충격성 및 강성이 떨어져 이를 개량하기 위한 목적으로 에틸렌-프로필렌 공중합체 고무(EPM)와 탈크 등의 무기필러를 첨가한 폴리프로필렌 수지조성물이 제안되고 있다.Polypropylene has been widely used in various fields because of its relatively low price, light weight, and excellent mechanical strength. However, a polypropylene resin composition to which inorganic fillers such as ethylene-propylene copolymer rubber (EPM) and talc are added has been proposed for the purpose of improving the impact resistance and rigidity.
종래 자동차의 휠커버는 철판의 프레스 성형에 의해 생산하였다. 최근 자동차 재료 개발의 최대 이슈인 경량화 관점에서 내열성이 우수한 나일론이나 폴리페닐렌 산화물 등이 사용되고 있으나, 고비용에 따른 경제적 부담을 안고 있다. 따라서 최근 저비용화의 관점에서 폴리프로필렌 등의 폴리올레핀의 강화 수지조성물에 대한 여러 가지 제안이 이루어지고 있다.The wheel cover of a conventional automobile was produced by press molding of an iron plate. Recently, nylon or polyphenylene oxide, which is excellent in heat resistance, has been used in terms of light weight, which is the biggest issue of automotive material development, but it has an economic burden due to high cost. Therefore, recently, various proposals have been made for reinforcing resin compositions of polyolefins such as polypropylene from the viewpoint of cost reduction.
예를 들면, 일본 특개평5-20561호에는 폴리프로필렌계 수지와 유기실란계 화합물에 의해 표면처리된 유리섬유로 구성된 훨커버를 제시하고 있다. 상기 폴리프로필렌계 수지에는 탈크 등의 성분이 포함되어 있어도 좋고, 무수말레산 변성 폴리프로필렌이 포함되어도 좋다.For example, Japanese Patent Laid-Open No. Hei 5-20561 discloses a mulch cover composed of a glass fiber surface-treated with a polypropylene resin and an organosilane compound. The polypropylene resin may contain a component such as talc or may contain maleic anhydride-modified polypropylene.
일본 특개평6-80839호에는 폴리프로필렌, 카르복실기를 도입한 폴리프로필렌, 실란 처리한 유리섬유 및 폴리에틸렌 왁스를 함유한 섬유강화 폴리프로필렌 수지조성물로부터 사출 성형에 의해 생산한 휠 커버를 제시하고 있다.Japanese Patent Laid-Open No. 6-80839 discloses a wheel cover produced by injection molding from a fiber-reinforced polypropylene resin composition containing polypropylene, polypropylene having a carboxyl group, glass fiber treated with silane, and polyethylene wax.
또한 일본 특개평10-44701호에는 휠 커버용 수지로서 결정성 프로필렌 에틸렌 블록 공중합체 40∼90중량부, 에틸렌-프로필렌 공중합고무, 불포화 카르본산 또는 그 유도체로 변성된 폴리프로필렌 수지, 평균 입경이 10㎛ 이하인 탈크, 및 유리섬유를 함유한 것을 특징으로 한 유리섬유강화 수지조성물을 제시하고 있다.In addition, Japanese Patent Application Laid-open No. Hei 10-44701 discloses a wheel cover resin, 40 to 90 parts by weight of a crystalline propylene ethylene block copolymer, an ethylene-propylene copolymer rubber, a polypropylene resin modified with an unsaturated carboxylic acid or a derivative thereof, and an average particle diameter of 10 A glass fiber-reinforced resin composition comprising talc having a thickness of 탆 or less and glass fiber is proposed.
그러나 상기 휠커버용 폴리프로필렌 수지조성물은 강성을 유지하기 위하여 사용된 유리섬유 및 무기필러인 탈크(Talc)에 의해 충분한 강도, 내충격성, 내열성 및 강성을 얻을 수는 있으나, 휠커버의 표면 외관의 웰드라인 부위에서 돌출현상이 나타나는 문제점과 다량의 무기필러를 함유함에 따라 제품의 경량화가 어렵다는 문제점이 있다.
However, the polypropylene resin composition for the wheel cover can obtain sufficient strength, impact resistance, heat resistance and rigidity by using talc, a glass fiber and an inorganic filler used to maintain rigidity, but the weld line of the surface appearance of the wheel cover There is a problem in that it is difficult to reduce the weight of the product by containing a large amount of inorganic filler and a problem that the protrusion phenomenon occurs in the site.
본 발명은 상기와 같은 종래기술의 문제점을 해결하기 위한 것으로, 자동차 휠커버에 적용가능한 정도로 우수한 강도, 내충격성, 내열성 및 강성을 가지는 동시에, 경량화가 가능하고, 특히 웰드라인 발생 부위의 돌출 현상이 발생하지 않는 수지조성물을 제공하는 것을 목적으로 한다.
The present invention is to solve the problems of the prior art as described above, and has excellent strength, impact resistance, heat resistance and rigidity to the extent that can be applied to the automobile wheel cover, and at the same time can be reduced in weight, especially the occurrence of protrusion of the weld line generation site It is an object to provide a resin composition that does not.
이하에서 본 발명을 보다 상세하게 설명한다.Hereinafter, the present invention will be described in more detail.
본 발명의 수지조성물은 초고결정성 올레핀계 수지 35~75중량%, 무늬점도(ML1+4(100℃))가 10~100인 폴리올레핀계 엘라스토머 수지 3-25중량%, 불포화 카르본산 또는 그 무수물을 그라프트한 변성폴리프로필렌에 의해 표면처리된 다공성 유리구정(Glass Beads) 5~15중량% 및 평균입경이 1㎛이하인 황산바륨 5~15중량%를 포함하는 것을 특징으로 한다.The resin composition of the present invention is 35 to 75% by weight of ultra high crystalline olefin resin, 3 to 25% by weight polyolefin elastomer resin having a pattern viscosity (ML1 + 4 (100 ° C)) of 10 to 100, unsaturated carboxylic acid or anhydride thereof It characterized in that it comprises 5 to 15% by weight of porous glass spheres (Glass Beads) surface-treated with modified polypropylene grafted to 5 to 15% by weight of barium sulfate having an average particle diameter of 1㎛ or less.
본 발명의 수지조성물에 사용된 초고결정성 올레핀계 수지는 용융지수가 10∼60g/10분(ASTM D1238, 230℃, 2.16kg), 바람직하게는 20∼45g/10분이고, 초고결정성 올레핀계 수지중 호모부분의 아이소탁틱 펜타드분율이 96% 이상인 수지이다. 상기 초고결정성 올레핀계 수지는 올레핀계 엘라스토머의 흐름성을 향상시키고 내열성, 강성 및 열변형성을 높이는 역할을 한다. 초고결정성 올레핀계 수지가 35중량% 미만으로 사용되면 올레핀계 수지의 흐름성과 성형성에 문제를 발생하며 초고결성 올레핀계 수지가 75중량%을 초과하여 사용되면 내열성, 강성 및 열변형성을 높이는데 한계가 있으며 충격성을 저하시킨다. 프로필렌 호모부분의 아이소탁틱 펜타드분율이 96% 미만이면 초고결정성 올레핀계 수지의 강도, 내충격성, 내열성 및 강성 등의 기계적인 특성이 저하되고 얻어지는 휠커버 성형품의 내열성 및 강성이 낮아진다.The ultra high crystalline olefin resin used in the resin composition of the present invention has a melt index of 10 to 60 g / 10 minutes (ASTM D1238, 230 ° C., 2.16 kg), preferably 20 to 45 g / 10 minutes, and an ultra high crystalline olefin resin. It is a resin whose isotactic pentad fraction of the homo part of resin is 96% or more. The ultra-crystalline olefin resin serves to improve the flowability of the olefin elastomer and to enhance heat resistance, rigidity and thermal deformation. If the ultra-high olefin resin is used below 35% by weight, there is a problem in the flowability and formability of the olefin resin. If the ultra-high olefin resin is used in excess of 75% by weight, it is limited to increase the heat resistance, rigidity and thermal deformation. And impact resistance. If the isotactic pentad fraction of the propylene homo portion is less than 96%, the mechanical properties such as strength, impact resistance, heat resistance and rigidity of the ultra-high crystalline olefin resin are lowered, and the heat resistance and rigidity of the resulting wheel cover molded article are lowered.
상기 초고결정성 올레핀계 수지로는 구체적으로 아이소탁틱 폴리프로필렌, 프로필렌-에틸렌 코폴리머, 프로필렌-1-부텐 코폴리머, 프로필렌-1-헥센 코폴리머, 프로필렌-4-메틸-1-펜텐 코폴리머 등과 같은 소량의 다른 알파 올레핀과 프로필렌의 공중합체, 랜덤공중합체 또는 이들의 혼합물을 들 수 있다.
Specifically, the ultrahigh crystalline olefin resin may include isotactic polypropylene, propylene-ethylene copolymer, propylene-1-butene copolymer, propylene-1-hexene copolymer, propylene-4-methyl-1-pentene copolymer, and the like. Same small amount of other alpha olefins and copolymers of propylene, random copolymers or mixtures thereof.
본 발명의 수지조성물에 사용된 폴리올레핀계 엘라스토머는 무니점도 (ML1+4, 100℃)가 10∼100, 바람직하게는 20∼70이고, 용융지수(230℃, 2.16Kg)가 0.5∼10g/10분이며, 10∼40중량%의 코모노머의 함량, 바람직하게는 20∼30중량%의 코모노머의 함량을 가진다. 상기 폴리올레핀계 엘라스토머는 수지 조성물에 엘라스틱한 성질을 부여하기 위한 것으로서 탄성과 유연성을 나타내며, 초고결정성 올레핀계 수지와의 혼합에 의해 충격성을 개선하고, 분산성, 도장성 및 밀착성을 향상시킨다. 무니점도(ML1+4,100℃)가 10 미만인 엘라스토머를 사용하면 흐름성은 향상되나 기계적 물성이 저하되며, 100을 초과하는 엘라스토머를 사용하면 기계적 물성은 향상되나 흐름성이 저하되어 성형이 어려워진다.The polyolefin elastomers used in the resin composition of the present invention have a Mooney viscosity (ML1 + 4, 100 ° C) of 10 to 100, preferably 20 to 70, and a melt index (230 ° C, 2.16Kg) of 0.5 to 10 g / 10. And a content of 10-40% by weight of comonomer, preferably 20-30% by weight of comonomer. The polyolefin elastomer is intended to impart elastic properties to the resin composition, exhibits elasticity and flexibility, improves impact properties by mixing with ultra-high crystalline olefin resin, and improves dispersibility, paintability and adhesion. The use of an elastomer having a Mooney viscosity (ML1 + 4,100 ° C.) of less than 10 improves flowability but lowers mechanical properties. If an elastomer of more than 100 is used, mechanical properties improve, but flowability decreases, making molding difficult.
상기 폴리올레핀계 엘라스토머는 구체적으로 에틸렌 프로필렌 코폴리머 고무, 에틸렌 프로필렌 디사이클로 펜타디엔 고무, 에틸렌 프로필렌 1,4-헥사디엔 고무, 에틸렌 프로필렌 시클로 펜타디엔 고무, 에틸렌 프로필렌 메틸렌 노보넨 고무, 에틸렌 프로필렌 에틸리덴 노보덴 고무 또는 이들의 혼합물을 들 수 있다. 또한 수소화된 스티렌-부타디엔 블럭코폴리머(SEBS), 수소화된 스티렌 부타디엔 고무(HSBR), 스티렌 에틸렌-부틸렌 블럭코폴리머(SEBC) 및 결정성 에틸렌-부틸렌 블럭코폴리머(CEBC) 등을 사용할 수도 있다. Specific examples of the polyolefin-based elastomers include ethylene propylene copolymer rubber, ethylene propylene dicyclo pentadiene rubber, ethylene propylene 1,4-hexadiene rubber, ethylene propylene cyclopentadiene rubber, ethylene propylene methylene norbornene rubber, ethylene propylene ethylidene furnace Bowden rubber or mixtures thereof. Hydrogenated styrene-butadiene block copolymers (SEBS), hydrogenated styrene butadiene rubbers (HSBR), styrene ethylene-butylene block copolymers (SEBC) and crystalline ethylene-butylene block copolymers (CEBC) may also be used. have.
상기 폴리올레핀계 엘라스토머 수지는 5∼25중량%를 사용하며, 바람직하게는 10∼20중량%를 사용한다. 5중량% 미만으로 사용되면 혼합에 의한 효과가 거의 나타나지 않아 낙구충격강도 및 저온충격강도가 낮아져 제품성형 후 외부충격에 의한 깨짐 발생으로 바람직하지 않으며 25중량%을 초과하면 충격성은 향상되나 내열성 및 강성이 떨어지는 문제가 발생된다.
The polyolefin elastomer resin is used 5 to 25% by weight, preferably 10 to 20% by weight. If it is used below 5% by weight, the effect of mixing is hardly shown, so falling impact strength and low temperature impact strength are lowered, which is not preferable to breakage caused by external impact after molding.If it exceeds 25% by weight, the impact resistance is improved, but the heat resistance and rigidity are increased. This falling problem occurs.
본 발명의 수지조성물에 사용되는 다공성 유리구정은 웰드라인 부위 돌출현상을 개선하기 위한 것으로 레이저회절 산란법에 의한 중량 평균입경이 15∼45㎛이고 비중이 1.7이하인 것을 5∼15중량% 사용하는 것이 바람직하다. 상기 다공성 비드의 사용량이 10중량% 미만이면 자동차 휠커버 성형시 내열성과 강성이 저하되며, 15중량%를 초과하면 내열성과 강성은 우수하나 충격강도가 저하되며 휠커버 성형품의 중량이 높아지는 문제점이 발생된다. 또한 유리구정의 평균입경이 15㎛ 미만이면 웰드라인 부위 돌출현상의 개선효과가 적으며 유리구정의 평균입경이 45㎛ 이상이면 강성 및 내열성이 향상되나 충격강도가 저하되는 문제가 있다. 다공이 없는 유리구정은 경량화의 효과가 미미하므로, 특히 유리구정의 비중이 1.7이하의 제품을 사용시 경량화의 효과가 탁월하다. Porous glass spheres used in the resin composition of the present invention is to improve the weld line region protrusion phenomenon, the use of 5 to 15% by weight of the average particle diameter of 15 ~ 45㎛ and specific gravity of 1.7 or less by laser diffraction scattering method desirable. If the amount of the porous bead is less than 10% by weight, the heat resistance and rigidity is lowered when forming the automobile wheel cover, and if it exceeds 15% by weight, the heat resistance and the rigidity are excellent, but the impact strength is lowered and the weight of the wheel cover molded article is increased. In addition, if the average particle diameter of glass spheres is less than 15㎛, the improvement effect of the protrusion of the weld line portion is less. If the average particle diameter of glass spheres is 45㎛ or more, the stiffness and heat resistance are improved, but impact strength is lowered. Glass spheres without porosity have a minimal effect on weight reduction, and especially when a product with a specific gravity of glass spheres of 1.7 or less is used, the weight reduction effect is excellent.
상기 다공성 유리구정은 휠 커버의 도장성을 개선하고, 그 계면의 접착성 향 상을 통해 내충격성 및 내열성을 개선하고자 불포화 카르본산 또는 그 무수물을 그라프트한 변성폴리프로필렌에 의해 표면 처리된 유리구정을 사용한다. 다공성 유리구정을 표면처리하기 위한 변성 폴리프로필렌은 결정성 폴리프로필렌에 불포화 카르본산 또는 그 무수물 및 촉매를 이축 압출기에 투입하여 180∼220℃의 온도에서 가열하여 용융혼련하여 제조된 것을 사용한다. 다공성 유리구정의 표면처리 공정은 일정량의 유리구정을 투입한 이후 중량 평균입경이 15∼45㎛인 다공성의 유리구정을 선별하여 최종 공정에서 변성 폴리프로필렌을 용융상태에서 유리구정과 1:9의 비율로 표면처리를 실시한다.
The porous glass sphere is a glass sphere surface-treated with modified polypropylene grafted unsaturated carboxylic acid or its anhydride to improve the paintability of the wheel cover, and to improve impact resistance and heat resistance through improved adhesion of the interface. Use The modified polypropylene for surface-treating porous glass spheres is prepared by injecting unsaturated carboxylic acid or its anhydride and catalyst into crystalline polypropylene in a twin screw extruder, and heating and melting at 180-220 ° C. to melt kneading. In the surface treatment process of porous glass spheres, after adding a certain amount of glass spheres, a porous glass sphere having a weight average particle diameter of 15 to 45 μm is selected. Surface treatment with
본 발명의 수지조성물에 사용되는 황산바륨은 레이저회절 산란법에 의한 평균입경이 1㎛ 이하인 것을 5∼15중량%을 사용한다. 황산바륨은 변성 폴리프로필렌에 의해 표면처리된 다공성 유리구정과 혼합 사용시 자동차용 휠커버의 웰드라인 부위 돌출현상 개선에 탁월한 효과를 나타낸다. 황산바륨을 5중량% 미만으로 혼합하면 웰드라인 부위의 돌출현상 개선효과가 없으며, 15중량%을 초과하면 웰드라인 부위 돌출현상이 개선되고, 강성 및 내열성은 향상되나 부품의 경량화 효과가 떨어지며 내충격성이 저하된다.
As for barium sulfate used for the resin composition of this invention, 5-15 weight% of things whose average particle diameter by a laser diffraction scattering method are 1 micrometer or less are used. Barium sulfate has an excellent effect on the improvement of the weld line area protrusion phenomenon of the automobile wheel cover when mixed with porous glass spheres surface-treated by modified polypropylene. If barium sulfate is mixed at less than 5% by weight, there is no effect of improving the protrusion of the weld line portion, and if it exceeds 15% by weight, the protrusion of the weld line portion is improved, and the rigidity and heat resistance are improved, but the lightening effect of the part is reduced and the impact resistance is reduced. Is lowered.
본 발명의 조성물에서는 각종 첨가제, 보강재, 충진제, 예를들면 내열안정제, 내후안정제, 대전방지제, 활제, 슬립제(SLIP제), 핵제, 난연제, 규회석, 탄산칼슘, 마이카, 카올린, 클레이, 황산칼슘 등을 본 발명의 목적에 어긋나지 않는 범 위에서 첨가하는 것이 가능하다.
In the composition of the present invention, various additives, reinforcing agents, fillers, for example, heat stabilizers, weather stabilizers, antistatic agents, lubricants, slip agents (SLIP), nucleating agents, flame retardants, wollastonite, calcium carbonate, mica, kaolin, clay, calcium sulfate It is possible to add the above in the range which does not deviate from the objective of this invention.
이하, 실시예를 통하여 본 발명을 더욱 상세하게 설명하고자 하나, 하기 실시예는 설명의 목적을 위한 것으로 본 발명을 제한하고자 하는 것은 아니다.
Hereinafter, the present invention will be described in more detail with reference to Examples, but the following Examples are for the purpose of explanation and are not intended to limit the present invention.
실시예 및 비교예에 있어서 약호는 다음의 내용을 의미한다.In the examples and comparative examples, the symbol means the following contents.
1) 폴리프로필렌1) polypropylene
PPI-1 : 용융지수 30g/10분(230℃), 에틸렌 단위함량 10.5몰% PPI-1: Melt Index 30g / 10min (230 ° C), Ethylene Unit Content 10.5mol%
NMR법에 의한 아이소탁틱 펜타드분율이 96% 이하 Isotactic pentad fraction by NMR method is 96% or less
PPI-2 : 용융지수 30g/10분(230℃), 에틸렌 단위함량 10.5몰%PPI-2: Melt Index 30g / 10min (230 ℃), Ethylene Unit Content 10.5mol%
NMR법에 의한 아이소탁틱 펜타드분율이 96% 이상 Isotactic pentad fraction by NMR method is 96% or more
2) 폴리올레핀계 엘라스토머(EPM) 2) Polyolefin Elastomer (EPM)
EB-1 : 에틸렌-프로필렌계 공중합고무, 무늬점도(ML1+4, 100℃) 70, EB-1: Ethylene-propylene copolymer rubber, pattern viscosity (ML1 + 4, 100 ° C) 70,
프로필렌 함량 27중량% Propylene Content 27% By Weight
EB-2 : 에틸렌-부텐계 공중합고무, 무늬점도(ML1+4. 100℃) 44EB-2: Ethylene-butene copolymer rubber, pattern viscosity (ML1 + 4.100 ° C) 44
부텐 함량 20중량% Butene content 20% by weight
EB-3 : 에틸렌-옥텐계 공중합고무, 무늬점도(ML1+4, 100℃) 35, EB-3: ethylene-octene copolymer rubber, pattern viscosity (ML1 + 4, 100 ° C) 35,
옥텐 함량 25중량% Octene content 25% by weight
3) 변성폴리프로필렌수지에 의해 표면처리된 유리구정(Glassbeads)3) Glass Beads Surface-treated by Modified Polypropylene Resin
GBPC-1 : 변성폴리프로필렌수지:유리구정=1:9에 의해 표면처리된 GBPC-1: modified polypropylene resin: surface treatment by glass sphere = 1: 9
다공성의 유리구정(Glassbeads) (비중 1.66) Porous GlassBeads (1.66 Specific Gravity)
GB-2 : 변성폴리프로필렌수지:유리구정=1:9에 의해 표면처리된GB-2: Modified Polypropylene Resin: Surface Treatment by Glass Sphere = 1: 9
유리구정(Glassbeads) (비중 2.56) Glassbeads (weight 2.56)
GB-3 : 유리구정(Glassbeads)GB-3: Glassbeads
4) 황산바륨(BaSO4)4) Barium Sulfate (BaSO4)
BaSO4 : 평균입경 1㎛BaSO 4 : Average particle size 1㎛
7)변성폴리프로필렌수지7) Modified Polypropylene Resin
CP : 무수말렌인산에 의해 그라프트된 변성폴리프로필렌 수지(변성율 = 0.4)
CP: modified polypropylene resin grafted with maleic anhydride (modification ratio = 0.4)
실시예 및 비교예Examples and Comparative Examples
혼련압출기에 표 1에 기재된 각성분의 소정량을 일괄투입하여 혼련후 수지조성물을 제조하였다(유리구정은 압출기 사이드부에서 투입하였다). 실시예 및 비교예 모두 조성물 내 수분 흡습에 의한 물성의 약화를 고려하여 80℃ 오븐에서 2시간동안 건조하였다. 이 조성물을 삼성클뢰크너 FCM-110(형체력=110톤) 사출기를 사용하여 사출온도는 피딩 호퍼부에서 노즐 순으로 30/200/200/200/200℃, 금형온도는 60℃, 사출압력은 60∼100bar로 사출성형하여 물성측정용 성형품 및 웰드라인 돌출현상 측정용 시험편을 제작하였다. A predetermined amount of each component shown in Table 1 was collectively introduced into the kneading extruder to prepare a resin composition after kneading (glass spheres were introduced from the extruder side part). Both Examples and Comparative Examples were dried for 2 hours in an oven at 80 ℃ considering the weakening of the physical properties by moisture absorption in the composition. This composition was used for Samsung Kleukner FCM-110 (molding force = 110 tons) injection machine, and the injection temperature was 30/200/200/200/200 ℃ from the feeding hopper to the nozzle, the mold temperature was 60 ℃, and the injection pressure was 60 ℃. Injection molding was performed at ˜100 bar to prepare molded articles for measuring physical properties and test pieces for measuring weld line protrusion.
각 실시예 및 비교예의 물성측정은 다음과 같은 시험방법에 의해 실시하였고, 그 결과를 표 2에 나타내었다. Measurement of the physical properties of each Example and Comparative Example was carried out by the following test method, the results are shown in Table 2.
(1) 굴곡탄성율(MPa) : ASTM D790(1) Flexural modulus (MPa): ASTM D790
(2) IZOD충격강도(Kg·㎝/㎝) : ASTM D256(2) IZOD impact strength (Kgcm / cm): ASTM D256
(3) 열변형온도(℃) : ASTM D656(3) Heat Deflection Temperature (℃): ASTM D656
(4) 저온낙구시험 : 저온상태(-30℃)에서 500g의 추를 자연낙하하여 깨짐현(4) Low temperature falling test: Cracks due to spontaneous drop of 500 g weight at low temperature (-30 ℃)
상 판정 Award
(5) 휠커버 탈착시험 : 자동차 휠에 장착후 30회 탈착시험후 깨짐현상판정(5) Wheel cover desorption test: Determination of cracking phenomenon after 30 times desorption test after installation on automobile wheel
(6) 휠커버 외관 판단방법 : 휠커버 성형후 도장품을 일정거리(1M) 내에서(6) How to judge the appearance of the wheel cover: After molding the wheel cover, paint the product within a certain distance (1M)
검사자의 육안으로 판단하여 웰드라인 발생부위의 Visually determined by the inspector
외관불량현상을 한도견본으로 판단 Judging the appearance defect as a limit sample
(7) 웰드라인 돌출현상 : 시편의 웰드라인 부위 두께를 측정하여 판정(7) Weld line protrusion phenomenon: Determination by measuring the thickness of weld line part of specimen
(편차가 10㎛ 이상인 경우 불합격 판정) (If the deviation is 10㎛ or more, rejection determination)
본 발명에 따른 수지조성물은 우수한 강도, 내충격성, 내열성 및 강성을 가지는 동시에, 웰드라인 발생 부위의 돌출 현상이 발생하지 않으며, 경량화 효과가 탁월하여 자동차용 휠커버에 적용하기에 적당한다. The resin composition according to the present invention has excellent strength, impact resistance, heat resistance, and rigidity, and does not cause protrusion of weld line generation sites, and is excellent in lightening effect, which is suitable for application to automobile wheel covers.
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|---|---|---|---|---|
| JPH0732401A (en) * | 1992-07-16 | 1995-02-03 | Mitsubishi Motors Corp | Injection molded article and wheel cap for vehicle |
| JPH07118488A (en) * | 1993-10-20 | 1995-05-09 | Nissan Motor Co Ltd | Olefin resin composition for exterior trim part of automobile |
| KR20010105088A (en) * | 2000-05-19 | 2001-11-28 | 이계안 | Polypropylene resin composition |
| KR20020096342A (en) * | 2001-06-19 | 2002-12-31 | 현대자동차주식회사 | Polyolefin resin composition for wheel cover of automobile |
-
2001
- 2001-08-01 KR KR1020010046476A patent/KR100762064B1/en active IP Right Grant
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0732401A (en) * | 1992-07-16 | 1995-02-03 | Mitsubishi Motors Corp | Injection molded article and wheel cap for vehicle |
| JPH07118488A (en) * | 1993-10-20 | 1995-05-09 | Nissan Motor Co Ltd | Olefin resin composition for exterior trim part of automobile |
| KR20010105088A (en) * | 2000-05-19 | 2001-11-28 | 이계안 | Polypropylene resin composition |
| KR20020096342A (en) * | 2001-06-19 | 2002-12-31 | 현대자동차주식회사 | Polyolefin resin composition for wheel cover of automobile |
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| Publication number | Publication date |
|---|---|
| KR20030012453A (en) | 2003-02-12 |
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