KR101179906B1 - O-ring composition for oil cooler of CNG engine - Google Patents

O-ring composition for oil cooler of CNG engine Download PDF

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KR101179906B1
KR101179906B1 KR1020060132962A KR20060132962A KR101179906B1 KR 101179906 B1 KR101179906 B1 KR 101179906B1 KR 1020060132962 A KR1020060132962 A KR 1020060132962A KR 20060132962 A KR20060132962 A KR 20060132962A KR 101179906 B1 KR101179906 B1 KR 101179906B1
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natural gas
oil cooler
compressed natural
ring
fluorine rubber
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KR20080058829A (en
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강동국
정원교
정호진
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평화오일씰공업주식회사
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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
    • C08L15/00—Compositions of rubber derivatives
    • C08L15/02—Rubber derivatives containing halogen
    • 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
    • C08K5/0025—Crosslinking or vulcanising agents; including accelerators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M5/00—Heating, cooling, or controlling temperature of lubricant; Lubrication means facilitating engine starting
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/141—Feedstock

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Abstract

본 발명은 압축천연가스 엔진의 오일쿨러용 오링 조성물을 개시한다. 본 발명에 따른 압축천연가스 엔진의 오일쿨러용 오링 조성물은: 비닐리덴플로라이드와 테트라플루오로에틸렌과 퍼플루오로메틸비닐에테르를 포함하는 3원 공중합체에 큐어사이트 모노머(cure site monomer)가 함유된 3원계 불소고무와, 테트라플루오로에틸렌과 프로필렌의 공중합체를 포함하는 내화학성불소고무를 포함하여 이루어진 폴리머와; 충진제와; 폴리머를 퍼옥사이드(peroxide) 가교 시스템으로 이루어지게 하는 가교제를 포함하여 이루어진다.The present invention discloses an O-ring composition for an oil cooler of a compressed natural gas engine. The O-ring composition for an oil cooler of a compressed natural gas engine according to the present invention comprises: a cure site monomer in a terpolymer comprising vinylidene fluoride, tetrafluoroethylene and perfluoromethyl vinyl ether A polymer comprising a ternary fluorine rubber, and a chemically resistant fluorine rubber comprising a copolymer of tetrafluoroethylene and propylene; Fillers; And a crosslinking agent that makes the polymer a peroxide crosslinking system.

Description

압축천연가스 엔진의 오일쿨러용 오링 조성물{O-ring composition for oil cooler of CNG engine}O-ring composition for oil cooler of compressed natural gas engine

도 1은, 본 발명의 일 실시예에 따른 압축천연가스 엔진의 오일쿨러용 오링 조성물이 적용되는 압축천연가스 엔진오일쿨러용 오링과 엔진오일쿨러의 일부분의 일 예를 도시한 도면이다.1 is a view illustrating an example of a portion of an O-ring and an engine oil cooler for a compressed natural gas engine oil cooler to which an O-ring composition for an oil cooler of a compressed natural gas engine is applied according to an embodiment of the present invention.

〈도면의 주요 부호에 대한 간단한 설명〉<Brief description of the major symbols in the drawings>

10..엔진오일쿨러 20..쿨러몸체10. Engine oil cooler 20. Cooler body

21..오링홈 100..오링21.O-ring groove 100.O-ring

본 발명은 압축천연가스 엔진의 오일쿨러용 오링 조성물에 관한 것으로, 더욱 상세하게는 압축천연가스 엔진오일쿨러에서 엔진오일이 새는 것을 방지하는 오링을 형성하는 압축천연가스 엔진의 오일쿨러용 오링 조성물에 관한 것이다.The present invention relates to an O-ring composition for an oil cooler of a compressed natural gas engine, and more particularly, to an O-ring composition for an oil cooler of a compressed natural gas engine that forms an O-ring to prevent the engine oil from leaking in the compressed natural gas engine oil cooler. It is about.

버스와 택시와 전철 등이 대중교통으로 널리 이용되고 있다. 이러한 다양한 대중교통 중 버스는 그 동력원으로 디젤(Diesel)엔진이 주로 사용되었다. 그러나 자동차 배기가스에 의해 환경문제를 발생시키고, 특히 디젤 버스는 매연과 소음이 심한 문제점이 있어서 최근에는 천연가스를 연료로 사용하는 천연가스버스(NGV : Natural Gas Vehicle)로 대체되고 있다.Buses, taxis and trains are widely used for public transportation. Among these various public transports, buses were mainly diesel engines. However, due to the exhaust of automobiles, environmental problems, especially diesel buses have a lot of smoke and noise problems have recently been replaced by natural gas bus (NGV: Natural Gas Vehicle) that uses natural gas as fuel.

초기의 천연가스버스에 사용되는 연료는 액화천연가스(LNG : Liquefied Natural Gas)가 사용되었으나, 현재에는 액화천연가스를 압축한 압축천연가스(CNG : Compressed Natural Gas, 이하 "CNG" 라 함)가 주로 사용된다. CNG는 천연가스에 비해 부피가 200분의 1 정도로 작다. 따라서 CNG 버스는 액화천연가스 버스에 비해 더욱 많은 양의 연료를 저장시킬 수 있고, 한 번의 연료주입으로 더욱 먼 거리를 운행할 수 있다.Liquefied Natural Gas (LNG) was used as a fuel for the natural gas bus. However, Compressed Natural Gas (CNG), which is liquefied natural gas, is now used. Mainly used. CNG is about a hundredth smaller than natural gas. Therefore, CNG buses can store more fuel than liquefied natural gas buses, and can travel longer distances with a single fuel injection.

한편, CNG 엔진에는 가솔린엔진이나 디젤엔진처럼 엔진오일쿨러가 구비된다. 그리고, CNG 엔진오일쿨러에는 엔진오일이 새는 것을 방지하는 오링이 형성된다. 이 경우 오링은 실리콘 재질로 이루어진 것이 주로 사용된다.On the other hand, the CNG engine is equipped with an engine oil cooler like a gasoline engine or a diesel engine. The CNG engine oil cooler is provided with an O-ring to prevent the engine oil from leaking. In this case, the o-ring is mainly made of silicon.

여기서, CNG 엔진용 엔진오일은 질소 산화물(NOx)에 의한 산화 열화를 받기 쉽기 때문에, 디젤엔진용 오일과는 다르게 아민(Amine) 산화방지제가 포함되어 있고, 아민 산화방지제는 실리콘 재질로 이루어진 오링의 주쇄를 끊게 된다. 따라서, 상기 오링은 내유성이 떨어지게 되어 CNG 엔진오일의 오링으로 사용하기에 부적합하다. 또한, CNG 엔진오일에 의해 오링의 주쇄가 끊어짐에 따라, 팽윤 및 눌림현상이 발생하여, 오링이 CNG 엔진오일쿨러로부터 엔진오일이 새는 것을 방지하는 역할을 정상적으로 하지 못하는 문제점이 있다.Here, since the engine oil for CNG engines is susceptible to oxidation deterioration by nitrogen oxides (NOx), unlike the diesel engine oil, an amine antioxidant is included, and the amine antioxidant is made of an O-ring made of silicon. The main chain is broken. Therefore, the O-ring is inferior in oil resistance and is not suitable for use as an O-ring of CNG engine oil. In addition, as the main chain of the O-ring is cut off by the CNG engine oil, swelling and swelling occur, and the O-ring does not normally play a role of preventing the engine oil from leaking from the CNG engine oil cooler.

본 발명은 내유성이 강화되고, 팽윤 및 눌림현상이 거의 발생하지 않는 압축 천연가스 엔진의 오일쿨러용 오링 조성물을 제공하는 것을 목적으로 한다.An object of the present invention is to provide an O-ring composition for an oil cooler of a compressed natural gas engine in which oil resistance is enhanced and swelling and swelling hardly occur.

따라서 본 발명의 실시예에 따른 압축천연가스 엔진의 오일쿨러용 오링 조성물은: 비닐리덴플로라이드와 테트라플루오로에틸렌과 퍼플루오로메틸비닐에테르를 포함하는 3원 공중합체에 큐어사이트 모노머(cure site monomer)가 함유된 3원계 불소고무와, 테트라플루오로에틸렌과 프로필렌의 공중합체를 포함하는 내화학성불소고무를 포함하여 이루어진 폴리머와; 충진제와; 상기 폴리머를 퍼옥사이드(peroxide) 가교 시스템으로 이루어지게 하는 가교제를 포함하여 이루어진다.Therefore, the O-ring composition for the oil cooler of the compressed natural gas engine according to the embodiment of the present invention is a cure site monomer (cure site) in a terpolymer comprising vinylidene fluoride, tetrafluoroethylene and perfluoromethyl vinyl ether. a polymer comprising a ternary fluorine rubber containing a monomer) and a chemically resistant fluorine rubber including a copolymer of tetrafluoroethylene and propylene; Fillers; And a crosslinking agent which makes the polymer a peroxide crosslinking system.

한편, 상기 충진제는 상기 폴리머 100 중량부에 대하여 50 이하 중량부로 이루어진 것이 바람직하다.On the other hand, the filler is preferably made of 50 parts by weight or less based on 100 parts by weight of the polymer.

한편, 상기 가교제는 상기 폴리머 100 중량부에 대하여 20 이하의 중량부로 이루어진 것이 바람직하다.On the other hand, the crosslinking agent is preferably made of 20 parts by weight or less based on 100 parts by weight of the polymer.

또한, 상기 내화학성불소고무와 상기 3원계 불소고무가 60~99:1~40의 비율로 포함되어 이루어진 것이 바람직하다.In addition, the chemical resistance fluorine rubber and the ternary fluorine rubber is preferably comprised in a ratio of 60 ~ 99: 1 ~ 40.

이하, 도면을 참조하며 본 발명의 바람직한 실시예에 따른 압축천연가스 엔진의 오일쿨러용 오링 조성물을 상세히 설명한다.Hereinafter, an O-ring composition for an oil cooler of a compressed natural gas engine according to a preferred embodiment of the present invention will be described in detail.

도 1은, 본 발명의 일 실시예에 따른 압축천연가스 엔진의 오일쿨러용 오링 조성물이 적용되는 압축천연가스 엔진오일쿨러용 오링(100)과 엔진오일쿨러(10)의 일부분의 일 예를 도시한 도면이다. 이러한 압축천연가스 엔진오일쿨러용 오링(100)은 쿨러몸체(20)의 오링홈(21)에 수용되고, 결합봉(22)에 미도시된 관이 결 합된다. 오링(100)은, 상기 관이 쿨러몸체(20)에 결합된 상태에서 상기 관의 단부와 오링홈(21)상에 개재되어 엔진오일쿨러(10)로부터 엔진오일이 새는 것을 방지하는 역할을 한다.1 illustrates an example of a portion of an O-ring 100 and an engine oil cooler 10 for a compressed natural gas engine oil cooler to which an O-ring composition for an oil cooler of a compressed natural gas engine is applied according to an embodiment of the present invention. One drawing. The O-ring 100 for the compressed natural gas engine oil cooler is accommodated in the O-ring groove 21 of the cooler body 20, and a tube not shown in the coupling rod 22 is coupled. O-ring 100 is interposed on the end of the tube and the O-ring groove 21 in a state where the tube is coupled to the cooler body 20 serves to prevent the engine oil from leaking from the engine oil cooler 10. .

이러한 압축천연가스 엔진오일쿨러용 오링(100)을 형성하는 오링 조성물은 폴리머와, 충진제와, 가교제를 포함하여 이루어진다.The O-ring composition forming the O-ring 100 for the compressed natural gas engine oil cooler includes a polymer, a filler, and a crosslinking agent.

폴리머(polymer)는 비닐리덴플로라이드(vinylidenen fluoride) 단량체와 테트라플루오로에틸렌(tetrafluoroethylene) 단량체와 퍼플루오로메틸비닐에테르(perfluoromethylvinylether) 단량체를 포함하는 3원 공중합체에 큐어사이트 모노머(cure site monomer)가 함유된 3원계 불소고무와, 테트라플루오로에틸렌과 프로필렌의 공중합체를 포함하는 내화학성불소고무가 혼합되어 이루어진다.The polymer is a cure site monomer in a terpolymer comprising a vinylidene fluoride monomer, a tetrafluoroethylene monomer and a perfluoromethylvinylether monomer. The ternary fluorine rubber containing and the chemical-resistant fluorine rubber containing the copolymer of tetrafluoroethylene and propylene are mixed.

상기 큐어사이트 모노머의 일예로서는 trifluoro-monobromo-ethylene (- CF2 - CFBr -) 같은 화합물이 사용될 수 있다. 또한, 상기 내화학성불소고무와 상기 3원계 불소고무가 60~99:1~40의 비율로 포함되어 이루어진 것이 바람직하다.As an example of the curesite monomer, a compound such as trifluoro-monobromo-ethylene (-CF 2 -CFBr-) may be used. In addition, the chemical resistance fluorine rubber and the ternary fluorine rubber is preferably comprised in a ratio of 60 ~ 99: 1 ~ 40.

충진제(filler)는 폴리머의 접착성을 향상시키는 한편, 가공성, 및 보강성을 높이기 위한 것이다. 이러한 충진제로서 일반적인 카본 블랙이 사용될 수 있다. 상기 카본 블랙은 천연가스, 석유계, 또는 석탄타아르계 중질유 등의 함탄소 물질을 불완전 연소 또는 열분해시켜서 만든 물질로서, 보강성 및 내화학성이 우수하다. 이 경우 상기 카본 블랙은 ASTM 분류법의 경우 N900에 포함되는 MT 블랙일 수 있다. 여기서, 상기 충진제는 상기 폴리머 100 중량부에 대하여 50 이하 중량부로 이루어진 것이 바람직하다.Fillers are intended to improve the adhesion of the polymer while improving processability and reinforcement. As such a filler, general carbon black may be used. The carbon black is a material made by incomplete combustion or pyrolysis of a carbon-containing material such as natural gas, petroleum, or coal tar-based heavy oil, and has excellent reinforcement and chemical resistance. In this case, the carbon black may be MT black included in N900 in the case of ASTM classification. Here, the filler is preferably made of 50 parts by weight or less based on 100 parts by weight of the polymer.

가교제(cross-linking agent)는 상기 각각의 단량체들을 가교(cross-link)하는 기능을 한다. 가교란 수지에 굳기[硬度]나 탄력성 등 기계적 강도와 화학적 안정성을 주는 것을 말한다. 본 발명에 적용되는 가교제로는 과산화물(peroxide) 가황제로 이루어진다. 즉, 본 발명은 과산화물 가교 시스템을 사용한다. 과산화물 가황제는 아민 화합물에 대한 내성 및 메탄올에 대한 내성이 우수하다. 이 경우 본 발명에서는 가교제로 DBPH(2,5-dimethyl-2,5-di(t-butylperoxy)hexane)을 사용할 수 있다. 상기 가교제는 상기 폴리머 100 중량부에 대하여 20 이하의 중량부로 이루어진 것이 바람직하다.The cross-linking agent functions to cross-link each of the monomers. Crosslinking means giving mechanical strength and chemical stability, such as hardness and elasticity, to a resin. The crosslinking agent applied to the present invention comprises a peroxide vulcanizing agent. That is, the present invention uses a peroxide crosslinking system. Peroxide vulcanizing agents are excellent in resistance to amine compounds and resistance to methanol. In this case, DBPH (2,5-dimethyl-2,5-di ( t- butylperoxy) hexane) may be used as the crosslinking agent in the present invention. The crosslinking agent is preferably composed of 20 parts by weight or less based on 100 parts by weight of the polymer.

상기와 같은 성분으로 이루어진 본 발명에 따른 압축천연가스 엔진의 오일쿨러용 오링 조성물에서 3원계 불소고무와 내화학성불소고무를 혼합한 것에 의해 발생되는 효과는 다음 실시예에 의해 더욱 명확히 이해될 수 있다.In the O-ring composition for the oil cooler of the compressed natural gas engine according to the present invention having the above components, the effect generated by mixing the ternary fluorine rubber and the chemically resistant fluorine rubber can be more clearly understood by the following examples. .

(실시예)(Example)

본 실시예에 있어서, 압축천연가스 엔진의 오일쿨러용 오링 조성물은 3원계 불소고무와 내화학성불소고무의 혼합물로 이루어진 것이다.In this embodiment, the O-ring composition for the oil cooler of the compressed natural gas engine is composed of a mixture of ternary fluorine rubber and chemical resistant fluorine rubber.

이와 대비되는 비교예 1의 압축천연가스 엔진의 오일쿨러용 오링 조성물은 실리콘 고무이고, 비교예 2는 비닐리덴플로라이드 단량체와 테트라플루오로에틸렌 단량체 와 퍼플루오로메틸비닐에테르 단량체로 이루어진 3원계 불소고무이며, 비교예 3은 테트라플루오로에틸렌과 프로필렌의 공중합체로 이루어진 내화학성불소고무 이다.In contrast, the O-ring composition for the oil cooler of the compressed natural gas engine of Comparative Example 1 is silicone rubber, and Comparative Example 2 is a ternary fluorine composed of vinylidene fluoride monomer, tetrafluoroethylene monomer, and perfluoromethyl vinyl ether monomer. Rubber, and Comparative Example 3 is a chemical-resistant fluorine rubber composed of a copolymer of tetrafluoroethylene and propylene.

표 1는 본 실험에서 사용된 비교예 1 내지 3과 실시예에 대하여, 크랙 시험과, 압축영구줄음율 시험과, 내화학성 시험을 시험한 결과를 비교하여 나타낸 것이다. 이 경우 압축영구줄음율 시험은 KS 규격인 KS M 6518(가황고무의 물리적특성 시험방법)의 11항의 규격에 준하여 CNG 엔진오일에 침지하여 실시하였고, 내화학성 시험은 KS 규격인 KS M 6518의 침지시험의 규격에 맞추어 실시하였다. 크랙시험은 표면의 크랙 발생 유무를 육안으로 식별하였다.Table 1 shows the comparative examples 1 to 3 and the examples used in this experiment in comparison with the results of the crack test, compression set test and chemical resistance test. In this case, the compressive permanent shrinkage test was conducted by immersing in CNG engine oil according to KS M 6518 (Physical Properties Test Method of Vulcanized Rubber) of KS standard, and chemical resistance test was immersed in KS M 6518, KS standard. It carried out to the specification of the test. Crack test visually identified the presence of cracks on the surface.

시험항목Test Items 비교예 1
(실리콘 고무)Comparative Example 1
(Silicone rubber) 비교예 2
(3원계
내화학성불소고무)Comparative Example 2
(Three circle system
Chemical-resistant fluorine rubber) 비교예 3
(내화학성불소고무)Comparative Example 3
(Chemical resistant fluorine rubber) 실시예Example 크랙시험Crack Test 크랙crack 無Nil 有With 無Nil 無Nil 압축영구줄음율시험
(175℃×70hr)Compressive permanent shrinkage test
(175 ℃ × 70hr) 압축영구줄음율(%)Compressed permanent reduction rate (%) 6565 2828 4040 3232 내화학성
(175℃×70hr)Chemical resistance
(175 ℃ × 70hr) 경도변화(point)Hardness change (point) -14-14 00 00 -4-4 인장강도 변화율(%)Tensile Strength Change (%) -1-One -55-55 -55-55 -2-2 신율 변화율(%)Elongation Change Rate (%) 1010 -43-43 -48-48 44 체적 변화율(%)Volume change rate (%) 1818 1One 22 44

표 1에 나타난 바와 같이, 크랙시험에서 3원계 불소고무는 크랙이 발생하여 압축천연가스 엔진오일쿨러용 오링(100)으로 사용하기에 부적합했지만 본 실시예는 크랙이 발생하지 않았다.As shown in Table 1, in the crack test, the ternary fluorine rubber was not suitable for use as the O-ring 100 for the compressed natural gas engine oil cooler due to cracking, but this example did not generate cracks.

압축영구줄음율시험 결과를 보면, 본 발명에 따른 압축천연가스 엔진의 오일쿨러용 오링 조성물의 압축영구줄음율이 32%이고, 내화학성불소고무와 실리콘 고무는 그 이상이었다. 따라서, 본 발명에 따른 압축천연가스 엔진의 오일쿨러용 오링 조성물의 압축영구줄음 물성이 내화학성불소고무와 실리콘 고무의 압축영구줄음 물성보다 우수하다는 것을 알 수 있다. 여기서 3원계 불소고무의 압축영구줄음율은 28% 정도로 본 발명에 따른 압축천연가스 엔진의 오일쿨러용 오링 조성물의 압축영구줄음율 보다 낮지만, 크랙시험에서 크랙이 발생하였으므로 제외하기로 한다.Compressive permanent shrinkage test results, the compressive permanent shrinkage of the O-ring composition for the oil cooler of the compressed natural gas engine according to the present invention was 32%, chemical resistance fluorine rubber and silicone rubber was more than that. Therefore, it can be seen that the compression set of the O-ring composition for oil cooler of the compressed natural gas engine according to the present invention is superior to the compression set of the fluorine-resistant rubber and silicone rubber. Here, the compression permanent shrinkage of the ternary fluorine rubber is about 28% lower than that of the O-ring composition for the oil cooler of the compressed natural gas engine according to the present invention, but it is excluded because a crack has occurred in the crack test.

내화학성 시험 결과를 보면, 실리콘 고무는 경도변화가 크고, 압축영구줄음율이 높고, 체적변화율도 높다. 이는 실리콘 고무에는 팽윤이나 눌림현상이 발생하기가 쉽기 때문에 압축천연가스 엔진오일쿨러용 오링(100)으로 사용하기에 부적합하다는 것을 알 수 있다.According to the chemical resistance test results, silicone rubber has a large hardness change, a high compression set, and a high volume change rate. It can be seen that the silicone rubber is not suitable for use as the O-ring 100 for the compressed natural gas engine oil cooler because swelling or swelling easily occurs.

내화학성불소고무는, 인장강도 변화율이 본 발명의 인장강도 변화율보다 높고, 신율변화율도 본 발명의 본 발명의 신율변화율보다 높기 때문에 압축천연가스 엔진오일쿨러용 오링(100)으로 사용하기에 부적합하다.Chemical resistant fluorine rubber is not suitable for use as O-ring 100 for compressed natural gas engine oil cooler because the tensile strength change rate is higher than the tensile strength change rate of the present invention, and the elongation change rate is higher than the elongation change rate of the present invention. .

반면, 본 발명에 따른 압축천연가스 엔진의 오일쿨러용 오링 조성물은 경도변화와, 인장강도 변화율과, 신율 변화율과, 체적 변화율 모두 다른 물질들보다 낮은 값을 나타내었다. 이는 본 발명에 따른 압축천연가스 엔진의 오일쿨러용 오링 조성물이 CNG용 엔진오일에 거의 영향을 받지 않거나, 영향을 받는다 하더라도 미세하게 받는 것이므로, 압축천연가스 엔진오일쿨러용 오링으로 사용하기에 적합하다는 것을 알 수 있다.On the other hand, the O-ring composition for the oil cooler of the compressed natural gas engine according to the present invention showed a hardness change, a tensile strength change rate, an elongation change rate, and a volume change rate lower than those of other materials. This is because the O-ring composition for the oil cooler of the compressed natural gas engine according to the present invention is hardly affected by the engine oil for CNG or finely affected even if it is affected, so that it is suitable for use as the O-ring for the compressed natural gas engine oil cooler. It can be seen that.

따라서, 본 발명의 실시예에 따른 압축천연가스 엔진의 오일쿨러용 오링 조성물로 압축천연가스 엔진오일쿨러용 오링을 형성하게 되면, 엔진오일쿨러로부터 엔진오일이 새는 현상을 방지할 수 있다.Therefore, when the O-ring for the compressed natural gas engine oil cooler is formed from the O-ring composition for the oil cooler of the compressed natural gas engine according to the embodiment of the present invention, the engine oil may be prevented from leaking from the engine oil cooler.

표 2은 본 발명과 상기 물질들을 방치시간만 다르게 하여 시험한 결과를 나타내고 있다.Table 2 shows the results of the test of the present invention and the above materials by differently leaving time.

표 2에서 실시한 시험은 본 발명과 상기 물질들을 CNG 엔진오일 안에 넣고 175℃ 온도에서 24시간 방치해두고 압축영구줄음률을 테스트하였다.In the test performed in Table 2, the present invention and the materials were placed in a CNG engine oil and left at 175 ° C. for 24 hours to test the compression set.

비교예 1
(실리콘 고무)Comparative Example 1
(Silicone rubber) 비교예 2
(3원계 불소고무)Comparative Example 2
(Ternary fluorine rubber) 비교예 3
(내화학성불소고무)Comparative Example 3
(Chemical resistant fluorine rubber) 실시예Example 압축영구줄음율(%)
(175℃×24hr)Compressed permanent reduction rate (%)
(175 ℃ × 24hr) 1717 99 1212 1010

표 2에서 나타난 봐와 같이, 본 발명에 따른 압축천연가스 엔진의 오일쿨러용 오링 조성물은 압축영구줄음율이 10% 이고, 실리콘 고무나, 내화학성불소고무의 압축영구줄음율은 그 이상이기 때문에 본 발명에 따른 압축천연가스 엔진의 오일쿨러용 오링 조성물의 압축영구줄음 물성이 실리콘 고무나, 내화학성불소고무의 압축영구줄음 물성보다 우수하여, 압축천연가스 엔진오일쿨러용 오링으로 사용하기에 적합하다.As shown in Table 2, the O-ring composition for the oil cooler of the compressed natural gas engine according to the present invention has a compressive permanent shrinkage of 10%, and the compressive permanent shrinkage of silicone rubber or chemically resistant fluorine rubber is higher than that. Compressive permanent reduction properties of the O-ring composition for oil coolers of the compressed natural gas engine according to the present invention is superior to the compression permanent reduction properties of silicone rubber or chemically resistant fluorine rubber, suitable for use as an O-ring for compressed natural gas engine oil cooler Do.

본 발명에 따르면, 압축천연가스 엔진오일쿨러용 오링을 3원계 불소고무와 내화학성불소고무로 형성하여 상기 오링이 CNG 엔진오일에 거의 반응을 하지않음으로써, 상기 오링에 팽윤이나 눌림현상이 발생하지 않기 때문에, 본 발명의 실시예에 따른 압축천연가스 엔진의 오일쿨러용 오링 조성물로 이루어진 상기 오링이 CNG 엔진오일쿨러로부터 CNG 엔진오일이 새는 것을 방지하는 효과가 있다.According to the present invention, the O-ring for compressed natural gas engine oil cooler is formed of ternary fluorine rubber and chemical-resistant fluorine rubber so that the O-ring hardly reacts with CNG engine oil, so that swelling or swelling does not occur in the O-ring. Since the O-ring made of the O-ring composition for the oil cooler of the compressed natural gas engine according to the embodiment of the present invention has an effect of preventing the CNG engine oil from leaking from the CNG engine oil cooler.

본 발명은 도면에 도시된 실시예를 참고로 설명되었으나 이는 예시적인 것에 불과하며, 본 발명이 속하는 기술 분야의 통상의 지식을 가진 자라면 누구든지 이 로부터 다양한 변형 및 균등한 다른 실시예가 가능하다는 점을 이해할 것이다. 따라서, 본 발명의 진정한 기술적 보호 범위는 첨부된 특허청구범위의 기술적 사상에 의하여 정해져야 할 것이다.Although the present invention has been described with reference to the embodiments illustrated in the drawings, this is merely exemplary, and any person skilled in the art to which the present invention pertains may have various modifications and equivalent other embodiments. Will understand. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

Claims (4)

비닐리덴플로라이드(vinylidenen fluoride) 단량체와 테트라플루오로에틸렌(tetrafluoroethylene) 단량체와 퍼플루오로메틸비닐에테르(perfluoromethylvinylether) 단량체를 포함하는 3원 공중합체에 트리플루로-모노브로모-에틸렌(trifluoro-monobromo-ethylene)이 함유된 3원계 불소고무와, 테트라플루오로에틸렌과 프로필렌의 공중합체를 포함하는 내화학성불소고무를 포함하여 이루어진 폴리머;Trifluoro-monobromo- ethylene in a terpolymer comprising a vinylidene fluoride monomer, a tetrafluoroethylene monomer and a perfluoromethylvinylether monomer polymers comprising ethylene) -containing tertiary fluorine rubber and chemical-resistant fluorine rubber including a copolymer of tetrafluoroethylene and propylene; 충진제; 및Fillers; And 상기 폴리머를 퍼옥사이드(peroxide) 가교 시스템으로 이루어지게 하는 가교제;를 포함하고,And a crosslinking agent for making the polymer into a peroxide crosslinking system. 상기 내화학성불소고무와 상기 3원계 불소고무가 60~99:1~40의 중량비로 포함되어 이루어진 것을 특징으로 하는 압축천연가스 엔진의 오일쿨러용 오링 조성물.O-ring composition for the oil-cooler of the compressed natural gas engine, characterized in that the chemical resistance fluorine rubber and the ternary fluorine rubber is contained in a weight ratio of 60 ~ 99: 1 ~ 40. 제 1 항에 있어서,The method of claim 1, 상기 충진제는 상기 폴리머 100 중량부에 대하여 50 이하 중량부로 이루어진 것을 특징으로 하는 압축천연가스 엔진의 오일쿨러용 오링 조성물.The filler O-ring composition for an oil cooler of a compressed natural gas engine, characterized in that consisting of 50 parts by weight or less based on 100 parts by weight of the polymer. 제 1 항에 있어서,The method of claim 1, 상기 가교제는 상기 폴리머 100 중량부에 대하여 20 이하의 중량부로 이루어진 것을 특징으로 하는 압축천연가스 엔진의 오일쿨러용 오링 조성물.The cross-linking agent O-ring composition for an oil cooler of a compressed natural gas engine, characterized in that consisting of 20 parts by weight or less based on 100 parts by weight of the polymer. 삭제delete
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JP2002179808A (en) 2000-10-06 2002-06-26 Daikin Ind Ltd Vulcanized form for phosphorus-based additive- containing oil
KR100441071B1 (en) * 1995-11-15 2004-10-08 바이엘 악티엔게젤샤프트 Fluororubber capable of crosslinking with peroxide, method and use for its production

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KR100441071B1 (en) * 1995-11-15 2004-10-08 바이엘 악티엔게젤샤프트 Fluororubber capable of crosslinking with peroxide, method and use for its production
JP2002179808A (en) 2000-10-06 2002-06-26 Daikin Ind Ltd Vulcanized form for phosphorus-based additive- containing oil

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