KR20190080560A - Rubber composition of O-ring for hydrogen tank of fuel cell electric vehicle - Google Patents

Rubber composition of O-ring for hydrogen tank of fuel cell electric vehicle Download PDF

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KR20190080560A
KR20190080560A KR1020170183088A KR20170183088A KR20190080560A KR 20190080560 A KR20190080560 A KR 20190080560A KR 1020170183088 A KR1020170183088 A KR 1020170183088A KR 20170183088 A KR20170183088 A KR 20170183088A KR 20190080560 A KR20190080560 A KR 20190080560A
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polymer
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ring
rubber composition
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강영임
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평화오일씰공업주식회사
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    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09KMATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K3/00Materials not provided for elsewhere
    • C09K3/10Materials in mouldable or extrudable form for sealing or packing joints or covers
    • C09K3/1006Materials in mouldable or extrudable form for sealing or packing joints or covers characterised by the chemical nature of one of its constituents
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08KUse of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00Use of organic ingredients
    • C08K5/0008Organic ingredients according to more than one of the "one dot" groups of C08K5/01 - C08K5/59
    • C08K5/0025Crosslinking or vulcanising agents; including accelerators
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08KUse of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00Use of organic ingredients
    • C08K5/0008Organic ingredients according to more than one of the "one dot" groups of C08K5/01 - C08K5/59
    • C08K5/005Stabilisers against oxidation, heat, light, ozone
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08KUse of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00Use of organic ingredients
    • C08K5/04Oxygen-containing compounds
    • C08K5/14Peroxides
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    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08KUse of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00Use of organic ingredients
    • C08K5/36Sulfur-, selenium-, or tellurium-containing compounds
    • C08K5/37Thiols
    • C08K5/372Sulfides, e.g. R-(S)x-R'
    • C08K5/3725Sulfides, e.g. R-(S)x-R' containing nitrogen
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    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08KUse of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00Use of organic ingredients
    • C08K5/36Sulfur-, selenium-, or tellurium-containing compounds
    • C08K5/37Thiols
    • C08K5/378Thiols containing heterocyclic rings
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    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02Compositions 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
    • C08L23/16Elastomeric ethene-propene or ethene-propene-diene copolymers, e.g. EPR and EPDM rubbers
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    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09KMATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K3/00Materials not provided for elsewhere
    • C09K3/10Materials in mouldable or extrudable form for sealing or packing joints or covers
    • C09K2003/1087Materials or components characterised by specific uses
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09KMATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K2200/00Chemical nature of materials in mouldable or extrudable form for sealing or packing joints or covers
    • C09K2200/06Macromolecular organic compounds, e.g. prepolymers
    • C09K2200/0615Macromolecular organic compounds, e.g. prepolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • C09K2200/0617Polyalkenes
    • C09K2200/062Polyethylene

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Abstract

The present invention provides a rubber composition for an O-ring of a hydrogen storage tank for a hydrogen fuel cell vehicle, capable of reducing cost and providing excellent rigidity and durability. According to the present invention, the rubber composition for an O-ring of a hydrogen storage tank for a hydrogen fuel cell vehicle comprises: polymer maximized without processing oil and made of an ethylene propylene diene monomer (EPDM) material including 55 to 60 wt% of an ethylene component; a cross-linking agent including 5 to 10 parts by weight of dicumyl peroxide with respect to 100 parts by weight of the polymer; an anti-aging agent including 2 to 3 parts by weight of 2-mercaptobenzimidazole with respect to 100 parts by weight of the polymer; a filler including 5 to 40 parts by weight of carbon black with respect to 100 parts by weight of the polymer; and an additive including triallyl isocyanate.

Description

수소전지차량의 수소저장탱크용 오링의 고무 조성물{Rubber composition of O-ring for hydrogen tank of fuel cell electric vehicle}BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a rubber composition for a hydrogen storage tank,

본 발명은 수소저장탱크용 오링의 고무 조성물에 관한 것으로서, 보다 상세하게는 수소전지차량의 수소저장탱크용 오링의 고무 조성물에 관한 것이다. The present invention relates to a rubber composition for an O-ring for a hydrogen storage tank, and more particularly to a rubber composition for an O-ring for a hydrogen storage tank of a hydrogen battery vehicle.

지구온난화 등의 환경문제 대응을 위하여 친환경 자동차의 개발이 가속화되고 있으며, 현재 상용화 단계에 접어든 것이 수소연료전지 자동차이다.In order to respond to environmental problems such as global warming, the development of environmentally friendly vehicles is accelerating, and the hydrogen fuel cell vehicle is now in the commercialization stage.

수소연료전지 자동차는 자동차에 석유 대신 수소를 에너지로 하여 달리는 자동차를 의미한다. 차내 수소탱크에서 수소와 공기공급기 (컴프레셔) 에서 전달 받은 산소를 연료전지에 보내 전기를 생산하고 그 전기를 이용하여 모터를 돌려 구동하는 방식이다. 양극에 산소를 흘리고 음극에 수소를 흘리면 전기가 발생하고 부산물로 물 (수증기)이 나온다. Hydrogen fuel cell cars are cars that run on hydrogen as energy instead of oil. In a hydrogen tank in a car, hydrogen and oxygen supplied from an air supply (compressor) are sent to a fuel cell to produce electricity, and the motor is turned by using the electricity. When oxygen is supplied to the anode and hydrogen is supplied to the cathode, electricity is generated and water (water vapor) is produced as a byproduct.

수소연료전지 차량의 수소 저장 탱크에서는 고압(Max. 87.5MPa)으로 액화 수소를 저장한다. 수소 저장 탱크에 장착되는 오링은 해당 압력에 대한 씰링 (수소 가스 씰링) 역할을 수행한다. In a hydrogen storage tank of a hydrogen fuel cell vehicle, liquefied hydrogen is stored at a high pressure (Max. 87.5 MPa). The O-ring mounted on the hydrogen storage tank serves as a sealing (hydrogen gas sealing) for the pressure.

이 경우, 상기 오링은 수소에 대한 재료의 안정성, 탱크내 고압력(Max. 87.5MPa)에 대해 형상 변형 등이 없어야 한다. 그리고 기체를 액화시킬 경우 발생하는 저온 상태에 대한 성능도 가지고 있어야 한다.In this case, the O-ring should be free of shape deformation with respect to the stability of the material against hydrogen and the high pressure (Max. 87.5 MPa) in the tank. It should also have performance against low temperature conditions that occur when the gas is liquefied.

종래에는 상기 오링의 재료로, 고압 상태에서 씰링 역할을 수행하기 위해 강성을 가지는 TPU 소재를 사용하고 있다. Conventionally, as a material of the O-ring, a TPU material having rigidity is used to perform sealing at high pressure.

TPU소재는 열가소성 폴리우레탄 수지(Thermoplastic PolyUrethane)로 열가소성을 가진 우레탄 엘라스트머 소재로서, 강성 및 내구성이 우수하다는 장점이 있다. The TPU material is a thermoplastic polyurethane resin, which is a thermoplastic urethane elastomer material and has an advantage of being excellent in rigidity and durability.

그러나, 상기 TPU소재는 재료비가 비싸고, 저온성이 우수하지 않다는 문제점이 있다.However, the TPU material has a problem that the material cost is high and the low temperature property is not excellent.

한국특허 공개공보 제10-2004-0106369호Korean Patent Laid-Open Publication No. 10-2004-0106369

본 발명은 상기 문제점을 비롯한 여러 문제점을 해결하기 위한 것으로서, TPU소재와 대비하여 비용이 저감되고, 강성 및 내구성이 우수한 수소전지차량의 수소저장탱크용 오링의 고무 조성물을 제공하는 것을 목적으로 한다.It is an object of the present invention to provide a rubber composition for an O-ring for a hydrogen storage tank of a hydrogen-powered vehicle, which has a reduced cost compared to a TPU material and has excellent rigidity and durability.

따라서, 본 발명의 수소전지차량의 수소저장탱크용 오링의 고무 조성물에틸렌 성분이 55w% 내지 60w%인 EPDM 소재로 이루어지며 무가공유 배합된 폴리머와, 상기 폴리머 100 중량부 대비 5 내지 10 중량부를 갖는 디큐밀 퍼옥사이드(Dicumyl peroxide)로 이루어진 가교제와, 상기 폴리머 100 중량부 대비 2 내지 3 중량부를 갖는 2-메르캡토벤지미다졸 으로 이루어진 내열노화방지제와, 상기 폴리머 100 중량부 대비 5 내지 40 중량부를 갖는 카본 블랙으로 이루어진 충진제와, 트리알릴 이소사이안네이트(TRIALLYL ISOCYANATE)로 이루어진 첨가제를 포함한다. Therefore, the rubber composition of the O-ring for hydrogen storage tank of the hydrogen cell vehicle of the present invention is composed of an EPDM material having an ethylene content of 55w% to 60w%, and a polymer blended with no hydrogenation, and 5 to 10 parts by weight A heat-resistant antioxidant consisting of a cross-linking agent consisting of dicumyl peroxide and 2-mercaptobenzimidazole having 2 to 3 parts by weight relative to 100 parts by weight of the polymer; and 5 to 40 parts by weight, based on 100 parts by weight of the polymer, , And an additive composed of triallyl isocyanate.

상기 폴리머의 무니 (Mooney) 점도가 25 MU(ML 1 + 4/100 ℃)인 것이 바람직하다.The Mooney viscosity of the polymer is preferably 25 MU (ML 1 + 4/100 ° C).

또한, 상기 EPDM은 에틸렌 성분이 56w%이고, ENB(ethylidene norbornene) 성분이 4.7 wt%인 것이 바람직하다.The EPDM preferably has an ethylene content of 56% by weight and an ENB (ethylidene norbornene) content of 4.7% by weight.

상기 충진제는, 상기 폴리머 100phr 대비 5 내지 40phr인 세라믹(SiO2Al2O3)을 더 포함할 수 있다.The filler may further include a ceramic (SiO2Al2O3) having 5 to 40 phr of 100 phr of the polymer.

또한, 상기 트리알릴 이소사이안네이트의 중량비는 폴리머 100 중량부 대비 0.2 내지 1.0 중량부 일 수 있다.The weight ratio of the triallyl isocyanate may be 0.2 to 1.0 part by weight based on 100 parts by weight of the polymer.

본 발명에 따르면, EPDM 고무를 적용하여 비용이 저감되고, 금속성분이 외부로 누출되지 않아서 강성 및 내구성이 우수한 수소전지차량의 수소저장탱크용 오링이 제작될 수 있다. According to the present invention, the EPDM rubber is applied to reduce the cost and the O-ring for the hydrogen storage tank of the hydrogen battery vehicle, which is excellent in rigidity and durability because the metal component does not leak to the outside, can be manufactured.

이하, 본 발명의 바람직한 실시예를 상세히 설명한다. Hereinafter, preferred embodiments of the present invention will be described in detail.

본 발명의 바람직한 실시예에 따른 수소전지차량의 수소저장탱크용 오링의 고무 조성물은, 폴리머와, 가교제와, 내열노화방지제와, 충진제를 포함한다. The rubber composition of the O-ring for the hydrogen storage tank of the hydrogen cell vehicle according to the preferred embodiment of the present invention includes a polymer, a cross-linking agent, a heat resistant antioxidant, and a filler.

폴리머는 에틸렌 성분이 55wt% 내지 60wt%, 보다 바람직하게는 56w%인 EPDM 소재로 이루어지며, 가공유 없이 배합된다. 이 경우, 상기 EPDM의 무니(Mooney) 점도는 15 내지 35 MU(ML 1 + 4/100 ℃)인 EPDM 소재로 이루어질 수 있다. The polymer is composed of an EPDM material having an ethylene content of 55 wt% to 60 wt%, more preferably 56 wt%, and is blended without processing oil. In this case, the EPDM may have an Mooney viscosity of 15 to 35 MU (ML 1 + 4/100 ° C).

EPDM은 에틸렌과 프로필렌 및 약간의 디엔 성분과의 3원 중합체로서, 내노화성, 내오존성, 내약품성 및 내열성이 우수하다. 이 경우, 상기 EPDM은 이온이 용출되지 않고, 전기절연성이 우수하여야 한다. 이를 위하여, 본 발명에 적용되는 EPDM은 무니 (Mooney) 점도가 15 내지 35 MU(ML 1 + 4/100 ℃), 보다 바람직하게는 25 MU(ML 1 + 4/100 ℃)일 수 있다. EPDM is a ternary polymer of ethylene, propylene and some diene components, and is excellent in resistance to aging, ozone resistance, chemical resistance and heat resistance. In this case, the EPDM should not dissolve ions and have excellent electrical insulation. For this, the EPDM to be applied to the present invention may have Mooney viscosity of 15 to 35 MU (ML 1 + 4/100 ° C), more preferably 25 MU (ML 1 + 4/100 ° C).

(ML 1+4/100℃)은 고무의 점도 (Mooney viscosity) 측정 하는 시험 조건을 의미하는 것으로서, 100℃에서 큰 로터(100M)를 사용하여 1분간 예열하여 로터 시동 후 4분의 값을 읽은 값을 의미한다. (ML 1 + 4/100 ° C) means the test conditions for measuring the Mooney viscosity of the rubber. It is preheated at 100 ° C for 1 minute using a large rotor (100M) Lt; / RTI >

EPDM의 점도가 25 MU로서 낮은 점도를 가진다. 이에 따라서 가공유없이 배합이 가능하게 됨으로써, 금속 또는 이온 용출 성분을 포함하지 않게 된다. EPDM has a low viscosity of 25 MU. As a result, it is possible to formulate without processing oil, so that it does not contain metal or ion eluted components.

이 경우, 상기 EPDM은 에틸렌(ethylene) 성분이 50wt% 내지 65wt%, 보다 바람직하게는 55w% 내지 60w%이고, ENB(ethylidene norbornene) 성분이 3wt% 내지 6wt%일 수 있다. , ENB(ethylidene norbornene) 성분이 4.7 wt%인 것이 보다 바람직하다.In this case, the EPDM may have an ethylene content of 50 wt% to 65 wt%, more preferably 55 wt% to 60 wt%, and an ethylenene norbornene (ENB) content of 3 wt% to 6 wt%. , And an ethylenene norbornene (ENB) component of 4.7 wt%.

ENB는 디엔의 모노머의 일종으로서 황 가황이 가능하도록 소량 첨가된다. 이러한 성분으로 제조시에, 저온 특성 및 전기적 특성이 우수하게 된다. ENB is a kind of monomers of dienes and added in a small amount to enable sulfur vulcanization. Such components are excellent in low-temperature characteristics and electrical characteristics at the time of production.

이 경우, EPDM으로 ㈜금호폴리켐의 KEP330 제품을 사용할 수 있다. 상기 ㈜금호폴리켐의 KEP330 제품은 에틸렌 성분이 56wt%이다. In this case, KEP330 product of Kumho Polychem Co., Ltd. can be used as EPDM. The KEP 330 product of Kumho Polychem Co., Ltd. has an ethylene content of 56 wt%.

배합제는 이온 용출 성분을 가지지 않는 성분으로 이루어질 수도 있다. 이는 수소탱크 내의 수소와 반응하여 나오는 이온 용출에 의하여 씰링력의 성능이 저하되는 것을 방지할 수 있다. The compounding agent may be composed of a component having no ion elution component. This can prevent deterioration of the sealing performance due to ion elution resulting from reaction with hydrogen in the hydrogen tank.

이 경우, 상기 배합제는, 순도가 95% 이상의 퍼옥사이드(peroxide) 계열의 가교제와, 입자경이 70 내지 100 nm인 카본블랙 SRF로 이루어진 충진제를 포함할 수 있다.In this case, the compounding agent may include a peroxide-based crosslinking agent having a purity of 95% or more and a filler consisting of carbon black SRF having a particle diameter of 70 to 100 nm.

가교제(cross-linking agent)는 상기 폴리머를 구성하는 단량체들을 상호 가교하는 기능을 하는 것으로, 가황제라고도 불린다. 퍼옥사이드 계열의 가교제의 순도가 95%이상이다. 이에 따라서 순도가 낮은 퍼옥사이드 계열의 가교제를 사용하여 제작된 EPDM 고무에서 용출되는 칼슘, 규소 이온이 용출되지 않는다. 가교제의 순도가 98% 이상인 것이 보다 바람직하다. The cross-linking agent cross-links the monomers constituting the polymer and is also called a vulcanizing agent. The purity of the peroxide-based crosslinking agent is 95% or more. As a result, the calcium and silicon ions eluted from the EPDM rubber produced using the peroxide-based crosslinking agent having low purity are not eluted. The purity of the crosslinking agent is more preferably 98% or more.

상기 가교제는 디큐밀 퍼옥사이드(Dicumyl peroxide)일 수 있다. 디규밀퍼옥사이드는 황과 달리 가교 온도에서 분해되어 자유 라디칼(free radicals : R·)을 형성한다. 이들 자유 라디칼은 고분자 사슬(PH)에서 수소 원자를 빼내어 RH를 만들고 고분자 라디칼(P·)을 형성한다. 인접하는 고분자 라디칼들이 서로 결합하여 고분자간의 탄소-탄소 가교 결합(P-P)을 형성하게 된다.The cross-linking agent may be dicumyl peroxide. Unlike sulfur, dimethylsilicone oxide decomposes at the crosslinking temperature to form free radicals (R ·). These free radicals pull hydrogen atoms from the polymer chain (PH) to form RH and form polymer radicals (P ·). Adjacent polymer radicals bind to each other to form a carbon-carbon bridge (P-P) between the polymers.

이 경우, 본 발명은 디큐밀 퍼옥사이드로서 ㈜NOF의 PERCUMYL D제품을 사용할 수 있다. 이 경우, 상기 주 가교제는 폴리머 100phr 대비 5 내지 10 phr일 수 있다. 가교제의 함량이 10 phr를 초과하면 과가교가 이루어지고, 5 phr 미만이면 미가교가 이루어질수 있다.In this case, PERCUMYL D product of NOF Corporation may be used as the dicumyl peroxide in the present invention. In this case, the main crosslinking agent may be 5 to 10 phr based on 100 phr of the polymer. When the content of the crosslinking agent exceeds 10 phr, over-crosslinking is effected, and when the content of the crosslinking agent is less than 5 phr, uncrosslinked can be achieved.

한편, 충진제는, 입자경이 70nm 내지 100nm인 카본블랙 SRF로 이루어질 수 있다. 카본 블랙은 수소저장탱크용 오링으로서의 요구 물성치, 예를 들어 경도, 인장강도 등을 조절하기 위함이다. 여기서 카본 블랙이란 천연가스, 석유계, 또는 석탄타아르계 중질유 등의 함탄소 물질을 불완전 연소 또는 열분해하여 만든 물질로서, 탄소원자들이 무질서한 육각형 꼴로 배열되어 있어서 보강성이 우수하다. On the other hand, the filler may be composed of carbon black SRF having a particle diameter of 70 nm to 100 nm. Carbon black is used to control required physical properties such as hardness, tensile strength and the like as an O-ring for a hydrogen storage tank. Here, carbon black is a substance made by incomplete combustion or pyrolysis of a carbonaceous material such as natural gas, petroleum, or coal tar-based heavy oil, and the carbon atoms are arranged in disordered hexagons, which is excellent in reinforcement.

이 경우 카본블랙은 입자경이 클 것이 요구된다. 상기 충진제는 폴리머 100phr 대비 100 내지 120phr일 수 있다.In this case, the carbon black is required to have a large diameter. The filler may be 100 to 120 phr of 100 phr of the polymer.

한편, 본 발명은 내열노화방지제를 더 포함할 수 있다. 내열노화방지제는 노화현상의 주요 인자인 산소에 의해서 자동 산화되는 연쇄반응을 정지시키는 작용을 한다. 본 발명에서는 내열노화방지제가 2-메르캡토벤지미다졸(2-Mercaptobenzimidazole)일 수 있다. 상기 2-메르캡토벤지미다졸은 내열성과 내굴곡성 및 내오존성이 우수하고, 고무와 상용성도 좋아 블루밍(BLOOMING)이 없고, 고무의 스코치(Scorch)에 대한 영향이 없다는 장점이 있다. 상기 2-메르캡토벤지미다졸은 폴리머 100phr 대비 2 내지 3 phr일 수 있다.On the other hand, the present invention may further comprise a heat aging inhibitor. The anti-aging agent acts to stop the chain reaction, which is autoxidized by oxygen, which is a major factor of the aging phenomenon. In the present invention, the heat aging inhibitor may be 2-mercaptobenzimidazole. The 2-mercaptobenzimidazole is excellent in heat resistance, bending resistance and ozone resistance, has good compatibility with rubber and has no blooming and has no effect on the scorch of the rubber. The 2-mercaptobenzimidazole may be 2 to 3 phr based on 100 phr of the polymer.

한편, 본 발명은 가류 조제로 산화아연(징크옥사이드)를 적용할 수 있다. 상기 산화아연의 중량부는 폴리머 100phr 대비 5 내지 10 phr일 수 있다.On the other hand, zinc oxide (zinc oxide) can be applied as a curing agent in the present invention. The weight percentage of the zinc oxide may be 5 to 10 phr based on 100 phr of the polymer.

산소탱크에 적용되는 오링의 고무 성분이 산소탱크내의 공간으로 빠져나가면 되지 않는다. 이 경우, 내유성 및 내열성이 약화되기 때문이다. The rubber component of the O-ring applied to the oxygen tank does not escape into the space in the oxygen tank. In this case, oil resistance and heat resistance are weakened.

본 발명에 적용된 산화아연은 상기 고무 성분이 외부로 빠져나가지 않도록 한다. 또한, 상기 산화아연은 배합 시간을 단축시키는 장점이 있다. The zinc oxide applied to the present invention prevents the rubber component from escaping to the outside. In addition, the zinc oxide has an advantage of shortening the mixing time.

이 경우, 금속 성분이 빠져나가지 않도록 첨가제가 더 구비될 수 있다. 상기 첨가제는 트리알릴 이소사이안네이트(TRIALLYL ISOCYANATE)일 수 있다. In this case, an additive may be further added so that the metal component does not escape. remind The additive may be TRIALLYL ISOCYANATE.

상기 트리알릴 이소사이안네이트를 적용하면, 알릴 컴파운드에서 생성된 라디칼이 알릴 공명에 의하여 안정이 되고, 라디칼의 밀도가 높은 레벨에서 유지될 수 있다. 또한, 상호 단위체간의 폴리머화 공정이 쉽게 일어나지 않게 되어서, 결합 반응이 효과적으로 된다. 이를 통하여 트리알릴 이소사이안네이트는 가류 밀도를 높이고 금속 성분 등이 빠져나가지 않도록 방지하는 역할을 한다. When the triallyl isocyanate is applied, the radicals generated in the allyl compound are stabilized by allyl resonance, and the density of the radicals can be maintained at a high level. Further, the polymerizing process between the mutual units is not easily performed, and the binding reaction is effective. Through this, triallyl isocyanate enhances the vulcanization density and prevents metal components from escaping.

상기 첨가제의 중량비는 0.2 내지 1.0wt%, 보다 바람직하게는 0.5wt%일 수 있다.The weight ratio of the additive may be 0.2 to 1.0 wt%, more preferably 0.5 wt%.

본 발명의 오링 고무 조성물은, 저온 특성이 우수한 EPDM을 폴리머로 함과 동시에, 충진제, 가류제, 가류조제를 최적화하여서 TPU소재와 거의 동등한 성질을 가지도록 하였다. 따라서, 제조 비용이 저감되는 장점을 가진다.The oily rubber composition of the present invention is made of EPDM excellent in low-temperature characteristics as a polymer and has almost the same properties as the TPU material by optimizing a filler, a vulcanizing agent and a vulcanizing aid. Therefore, the manufacturing cost is reduced.

이하에서는 본 발명의 실시예에 따른 수소전지차량의 수소저장탱크용 오링의 고무 조성물의 성질을 각종 테스트한 결과를 설명한다.Hereinafter, the results of various tests for the properties of the rubber composition of the O-ring for the hydrogen storage tank of the hydrogen battery vehicle according to the embodiment of the present invention will be described.

표 1은 본 발명에 적용된 오링의 고무 조성물(이하, "실시예")의 구성 성분을 나타낸다.Table 1 shows the constituents of the rubber composition of the O-ring (hereinafter "Examples") applied to the present invention.

구성성분(중량부)Components (parts by weight) 비교예Comparative Example 실시예Example 폴리머Polymer TPUTPU 100100 00 Ethylene content 56% EPDM POLYMEREthylene content 56% EPDM POLYMER 00 4848 충진보강제Filler SRF 1) SRF 1) 00 4646 가류제Vulcanizing agent DCP 2) DCP 2) 00 22 내열노화방지제Heat aging inhibitor MB 3) MB 3) 00 1One 가교조제Crosslinking auxiliary ZINC OXIDE 4) ZINC OXIDE 4) 00 22 가공조제Processing aid STEARIC ACID 5) STEARIC ACID 5) 00 0.50.5 촉진제accelerant TRIALLYL ISOCYANATE 6) TRIALLYL ISOCYANATE 6) 0
0
0.50.5
1) SRF : Carbon black (N-774) , OCI 社
2) DCP : Percumyl D (DCP), NOF 社
3) MB : 2-Mercaptobenzimidiazole, 대내신흥 社
4) ZINC OXIDE : Zinc Oxide, 삼보아연 社
5) STEARIC ACID : Stearic Acid, NATOLEO 社
6) TRIALLYL ISOCYANATE : TRIALLYL ISOCYANATE (TAIC), NIPPON KASEI CHEM 社
1) SRF: Carbon black (N-774), OCI
2) DCP: Percumyl D (DCP), NOF
3) MB: 2-Mercaptobenzimidiazole, in-house emerging company
4) ZINC OXIDE: Zinc Oxide, Sambo Zinc Corporation
5) STEARIC ACID: Stearic Acid, NATOLEO
6) TRIALLYL ISOCYANATE: TRIALLYL ISOCYANATE (TAIC), NIPPON KASEI CHEM

그 결과 표 2에 도시된 바와 같이, 실시예의 경도가 92 (shore A), 인장강도가 237kgf/㎠, 신율이 124%, 150℃ 70시간 평가 기준 압축영구줄음율 10% 미만으로 내열성 및 내부동액성 및 압축영구줄음율이 우수한 것으로 나타났다. As a result, as shown in Table 2, the hardness of the example was 92 (shore A), the tensile strength was 237 kgf / cm 2, the elongation was 124%, the compression set at 150 ° C for 70 hours was less than 10% And excellent permanent compression ratios.

CompoundCompound 실시예Example 기본물성Basic Properties 경도(Shore A)Hardness (Shore A) 9292 인장강도(kgf/㎠)Tensile strength (kgf / cm2) 237237 신율(%)Elongation (%) 124124 압축영구줄음률(%) 150℃ 70hCompression Permanent Row Tone (%) 150 ° C 70h 공기중In the air 1010 내열성
150℃ 70h
Heat resistance
150 ℃ 70h
경도변화(point)Hardness change (point) +1+1
인장강도 변화율(%)Tensile strength change rate (%) -10-10 신율변화율(%)Elongation rate (%) -3-3 내부동액성(LLC:H2O=5:5)
130℃ 70h
The anti-freeze property (LLC: H 2 O = 5: 5)
130 ℃ 70h
경도변화(point)Hardness change (point) -2-2
인장강도 변화율(%)Tensile strength change rate (%) -6-6 신율변화율(%)Elongation rate (%) -4-4 체적변화율(%)Volume change rate (%) +2.6+2.6 저온성Low temperature TR-10 (℃)TR-10 (占 폚) -48-48

상술한 바와 같이, 본 발명의 바람직한 실시예를 참조하여 설명하였지만 해당 기술분야의 숙련된 당업자라면 하기의 청구범위에 기재된 본 발명의 사상 및 영역으로부터 벗어나지 않는 범위 내에서 본 발명을 다양하게 수정 및 변경시킬 수 있음을 이해할 수 있을 것이다.Although the present invention has been described with reference to the preferred embodiments thereof, it will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention as defined in the following claims. It can be understood that

Claims (5)

에틸렌 성분이 55w% 내지 60w%인 EPDM 소재로 이루어지며 무가공유 배합된 폴리머;
상기 폴리머 100 중량부 대비 5 내지 10 중량부를 갖는 디큐밀 퍼옥사이드(Dicumyl peroxide)로 이루어진 가교제;
상기 폴리머 100 중량부 대비 2 내지 3 중량부를 갖는 2-메르캡토벤지미다졸 으로 이루어진 내열노화방지제;
상기 폴리머 100 중량부 대비 5 내지 40 중량부를 갖는 카본 블랙으로 이루어진 충진제; 및
트리알릴 이소사이안네이트(TRIALLYL ISOCYANATE)로 이루어진 첨가제;
를 포함하는 수소전지차량의 수소저장탱크용 오링의 고무 조성물.
A non-covalently-blended polymer consisting of an EPDM material having an ethylene content of 55w% to 60w%;
A crosslinking agent composed of dicumyl peroxide having 5 to 10 parts by weight based on 100 parts by weight of the polymer;
A heat resistant antioxidant comprising 2-mercaptobenzimidazole having 2 to 3 parts by weight based on 100 parts by weight of the polymer;
A filler comprising carbon black having 5 to 40 parts by weight based on 100 parts by weight of the polymer; And
An additive comprising TRIALLYL ISOCYANATE;
Wherein the hydrogen storage tank comprises a hydrogen storage tank.
제1항에 있어서,
상기 폴리머의 무니 (Mooney) 점도가 25 MU(ML 1 + 4/100 ℃)인 것을 특징으로 하는 수소전지차량의 수소저장탱크용 오링의 고무 조성물.
The method according to claim 1,
Wherein the Mooney viscosity of the polymer is 25 MU (ML 1 + 4/100 ° C).
제1항에 있어서,
상기 EPDM은 에틸렌 성분이 56w%이고, ENB(ethylidene norbornene) 성분이 4.7 wt%인 것을 특징으로 하는 수소전지차량의 수소저장탱크용 오링의 고무 조성물.
The method according to claim 1,
Wherein the EPDM has an ethylene content of 56 wt% and an ENB (ethylidene norbornene) content of 4.7 wt%.
제1항 내지 제3항 중 어느 하나의 항에 있어서,
상기 충진제는, 상기 폴리머 100phr 대비 5 내지 40phr인 세라믹(SiO2Al2O3)을 더 포함하는 것을 특징으로 하는 수소전지차량의 수소저장탱크용 오링의 고무 조성물.
4. The method according to any one of claims 1 to 3,
Wherein the filler further comprises a ceramic (SiO2Al2O3) having 5 to 40 phr of 100 phr of the polymer.
제1항 내지 제3항 중 어느 하나의 항에 있어서,
상기 트리알릴 이소사이안네이트 의 중량비는 폴리머 100 중량부 대비 0.2 내지 1.0 중량부인 것을 특징으로 하는 수소전지차량의 수소저장탱크용 오링의 고무 조성물.
4. The method according to any one of claims 1 to 3,
Wherein the weight ratio of the triallyl isocyanate to the polymer is 0.2 to 1.0 part by weight based on 100 parts by weight of the polymer.
KR1020170183088A 2017-12-28 2017-12-28 Rubber composition of O-ring for hydrogen tank of fuel cell electric vehicle KR20190080560A (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20040106369A (en) 2002-04-25 2004-12-17 아사히 가세이 케미칼즈 가부시키가이샤 Rubber Composition and Process for Production Thereof

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