KR100802696B1 - Lubricating oil composition for compressed natural gas engine - Google Patents

Lubricating oil composition for compressed natural gas engine Download PDF

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KR100802696B1
KR100802696B1 KR20060076649A KR20060076649A KR100802696B1 KR 100802696 B1 KR100802696 B1 KR 100802696B1 KR 20060076649 A KR20060076649 A KR 20060076649A KR 20060076649 A KR20060076649 A KR 20060076649A KR 100802696 B1 KR100802696 B1 KR 100802696B1
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natural gas
oil composition
weight
engine oil
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KR20060076649A
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Korean (ko)
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윤원진
한남규
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에스케이에너지 주식회사
현대자동차주식회사
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    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10MLUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M133/00Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing nitrogen
    • C10M133/02Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing nitrogen having a carbon chain of less than 30 atoms
    • C10M133/04Amines, e.g. polyalkylene polyamines; Quaternary amines
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10MLUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M137/00Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing phosphorus
    • C10M137/12Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing phosphorus having a phosphorus-to-carbon bond
    • C10M137/14Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing phosphorus having a phosphorus-to-carbon bond containing sulfur
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10MLUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M141/00Lubricating compositions characterised by the additive being a mixture of two or more compounds covered by more than one of the main groups C10M125/00 - C10M139/00, each of these compounds being essential
    • C10M141/10Lubricating compositions characterised by the additive being a mixture of two or more compounds covered by more than one of the main groups C10M125/00 - C10M139/00, each of these compounds being essential at least one of them being an organic phosphorus-containing compound
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10MLUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M145/00Lubricating compositions characterised by the additive being a macromolecular compound containing oxygen
    • C10M145/02Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • C10M145/10Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing monomers having an unsaturated radical bound to a carboxyl radical, e.g. acrylate
    • C10M145/12Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing monomers having an unsaturated radical bound to a carboxyl radical, e.g. acrylate monocarboxylic
    • C10M145/14Acrylate; Methacrylate
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10MLUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M169/00Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials, thickeners or additives, covered by the preceding groups, each of these compounds being essential
    • C10M169/04Mixtures of base-materials and additives
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10NINDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2030/00Specified physical or chemical property which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
    • C10N2030/02Pour-point; Viscosity index
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10NINDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2030/00Specified physical or chemical property which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
    • C10N2030/06Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10NINDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2030/00Specified physical or chemical property which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
    • C10N2030/10Inhibition of oxidation, e.g. anti-oxidants
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10NINDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2030/00Specified physical or chemical property which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
    • C10N2030/12Inhibition of corrosion, e.g. anti-rust agents, anti-corrosives
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10NINDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2030/00Specified physical or chemical property which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
    • C10N2030/18Anti-foaming property

Abstract

An engine oil composition for a compressed natural gas engine is provided to protect an engine due to a good wear preventing function and a valve train and a piston due to a good oxidation preventing function and to extend the exchange period of engine oil. An engine oil composition for a compressed natural gas engine consists of base oil of 78~90wt.%, an anti-oxidation agent of 0.05~3wt.%, a purifying agent of 1~7wt.%, a viscosity index improving agent of 0.1~5.0wt.%, an anti-foaming agent of 0.0005~2wt.%, and a wear resistant agent of 0.5~5wt.%. The wear resistant agent is produced by mixing primary zinc-dialkyl dithiophosphate and secondary zinc-dialkyl dithiophosphate at the weight rate of 2:1. The base oil has a coefficient of kinematic viscosity of 3~10cSt at 100deg.C. Mineral oil and synthetic oil of a fixing agent with a viscosity index over 100 are individually used or mixed.

Description

압축천연가스 기관용 엔진오일 조성물{Lubricating oil composition for Compressed natural gas engine} Compressed natural gas engine oil composition institutions {Lubricating oil composition for Compressed natural gas engine}

본 발명은 압축 천연가스 기관용 엔진오일 조성물에 관한 것으로서, 더욱 상세하게는 기유와 산화방지제, 청정제, 점도지수 향상제, 내마모제 및 소포제 등을 함유하여 각 성분들이 서로 시너지 효과를 발생시켜 제조된 엔진오일 조성물은 마모방지성능이 우수하여 엔진을 보호하고, 산화 방지성이 우수하여 밸브트레인과 피스톤을 보호하며, 엔진 오일의 교환주기를 연장 시키는 압축 천연가스 기관용 엔진오일 조성물에 관한 것이다. The invention CNG institutions engine relates to oil compositions, and more particularly, the base oil and antioxidants, detergents, viscosity index improvers, antiwear agent and a defoaming agent such as a motor oil composition prepared the respective components are to each other, generates a synergistic effect by containing relates to a compressed natural gas engine oil composition institutions to protect the engine is excellent in anti-wear performance, and to prevent oxidation is excellent, it protects the valve train and the piston, to extend the replacement cycle of the engine oil.

엔진오일의 성능을 개선시키기 위하여 SAE(자동차 기술협회 : Society of Automotive Engineers), ASTM(미국 재료 시험 협회 : formly the American Society for Testing and Materials) 및 API(미국 석유 기구 : American Petroleum Institute) 등의 여러 기관이 끊임없이 노력하고 있고, 엔진오일에 관한 여러 표준들이 설정되고 개량되어 왔다. (: Society of Automotive Engineers Automotive Technology Association), ASTM (American Society for Testing and Materials: formly the American Society for Testing and Materials) and the API SAE to improve the performance of the engine oil: many such (American Petroleum Agency American Petroleum Institute) and the agency is constantly working and has several standards for engine oils have been established and improved.

엔진오일은 크랭크 기구, 각종 엔진 부위의 윤활 기능 및 냉각 기능을 수행 하기 위하여 적당한 점도 특성, 고하중에서의 윤활 성능인 극압성, 산화안정성 및 마찰 특성이 요구되는데, 이러한 성능을 향상시키기 위해서는 적당한 특성을 가지는 기유와 첨가제 들이 알맞게 배합 되어야 한다. Engine oil is the lubricating performance of extreme pressure, oxidation stability, and friction characteristics in a suitable viscosity characteristics, and high loads in order to perform the lubricating function and cooling function of the crank mechanism, and various engine parts are required, the appropriate characteristics in order to improve this performance It has to be properly blended to the base oil and additives.

현재 에너지의 효율적 이용과 지구온난화 방지를 위해 이산화탄소 등 자동차 배기가스에 대한 규제가 점점 엄격해지고 있으며, 이러한 환경규제에 대응하기 위해 압축 천연가스(CNG) 기관으로 엔진구조 변경과 함께 사용하는 엔진 오일에 의한 연비향상을 목적으로 개발이 진행되고 있다. The engine oil for use with the efficient use and there are regulations on automobile exhaust gas, such as carbon dioxide, becoming more stringent in order to prevent global warming, the engine structure changed to compressed natural gas (CNG) engine in order to respond to such environmental regulations of the current energy It has developed and conducted for the purpose of improving fuel efficiency by.

또한 최근 엔진의 단위배기량당 출력이 지속적으로 늘어나고 있고, 차량형상의 공기저항 계수가 낮아져 엔진 오일에 미치는 열적 부하가 증가하는데 통상 윤활유의 온도가 10 ℃ 상승하면 산화속도는 2 배 상승하여 엔진오일의 수명을 단축시킨다. More recently, and increasing the output per unit of engine displacement of the engine is continued, and the drag coefficient of the vehicle-shaped low when the temperature of the conventional lubricant oil rises 10 ℃ to increase the thermal load on the engine oil oxidation rate is twice the increase in the engine oil shorten the life.

그리하여 통상적으로 엔진 오일을 제조하는데 있어서 기유에 산화방지제를 혼합하며 보통 메르캅토계 및 페놀계를 산화방지제로 사용하는데 산화 방지 성능에 한계가 있다. Thus, typically in the manufacture of a motor oil mixed in the base oil and the antioxidant is usually mercapto togye and limitations of phenolic anti-oxidation performance for use as an antioxidant.

이에, 본 발명자들은 엔진 오일의 산화 방지 및 마모방지 성능의 문제점을 해결 하고자 노력 하였다. The present inventors have tried to solve the problem of anti-oxidation and anti-wear performance of the engine oil.

그 결과, 기유에 아민계 산화방지제 및 1 차 아연-디알킬디티오포스페이트 및 2 차 아연-디알킬디티오포스페이트를 최적의 비로 혼합하고 점도지수향상제, 청 정제, 분산제, 금속불활성제, 및 소포제 등을 함유하여 각 성분들이 서로 시너지 효과를 발생시켜 제조된 엔진오일 조성물은 마모방지성능이 우수하여 엔진을 보호하고 산화 방지성이 우수하여 엔진 오일의 교환주기를 연장 시킨다는 것을 알게 되었다. As a result, the amine-based antioxidant and primary zinc in the base oil-dialkyl dithio phosphate and secondary zinc dialkyl dithio mixture of O-phosphate at a ratio of optimal and viscosity index improvers, blue tablets, dispersant, metal deactivator, and a defoaming agent and the like containing components that engine oil composition prepared by each other occurs a synergistic effect has been discovered that sikindaneun is excellent in anti-wear performance to protect the engine and has excellent oxidation resistance to extend the exchange cycle of the engine oil.

따라서, 본 발명은 내마모성과 내산화성이 우수한 압축 천연가스 기관용 엔진 오일 조성물을 제공하는데 목적이 있다. Accordingly, the present invention aims to provide a wear resistance and oxidation resistance is excellent compressed natural gas engine oil composition institutions.

본발명은 기유, 산화방지제, 청정제, 점도지수 향상제, 소포제를 포함하여 이루어진 압축 천연가스 기관용 엔진오일 조성물에 있어서, The present invention relates to a base oil, antioxidants, detergents, viscosity index improvers, compressed natural gas institutions engine oil composition comprising an anti-foaming agent,

상기 천연가스 엔진오일 조성물에, 1차 아연-디알킬디티오포스페이트와 2차 아연-디알킬디티오포스페이트가 2 : 1 중량비로 혼합된 내마모제 0.5 ~ 5 중량%를 함유하여 이루어진 압축 천연가스 기관용 엔진오일 조성물에 특징이 있다. To the natural gas engine oil composition, a primary zinc dialkyl dithio phosphate as a secondary zinc dialkyl dithio phosphate, 2: Compressed made in containing antiwear agent 0.5 to 5% by weight of mixture to 1 weight ratio of natural gas institutions engine the oil composition is characterized.

이와 같은 본 발명을 더욱 상세하게 설명하면 다음과 같다. Hereunder is provided a detailed description of the present invention.

종래 엔진 오일 제조는 기유에 각종 첨가물을 혼합 제조하며 엔진 오일의 특성은 첨가물에 영향을 많이 받는다. Preparation conventional engine oils are blended to prepare a variety of additives in the base oil and the properties of the engine oil receives a lot of effect on the additive. 본 발명은 내마모제, 산화방지제, 및 청정제를 조합하여 애쉬(Ash)에 의한 부작용을 최소화 하고 산화방지성과 내마모성이 유지되는 엔진 오일 조성물이다. The present invention is an engine oil composition which minimizes the adverse effects caused by Ash (Ash) by combining the antiwear agent, an antioxidant, and a detergent to maintain the anti-oxidation resistance and wear resistance.

본 발명에서 사용하는 기유는 기어장치의 윤활에 사용하는 윤활유의 총칭이며, 치면간의 급속접촉을 방지하고, 마찰, 마모를 저하시켜 녹아붙는 것을 방지하는 기능을 갖는다. Base oil used in the present invention is a general term for the lubricating oil used for the lubrication of the gear unit, and has a function of preventing the rapid contact between the tooth surface and prevent sticking melt to lower the friction and wear. 상기 기유는 100 ℃ 에서 동점도가 3 ~ 10 센티스톡(cSt) 범위인 것을 사용하며 3 센티스톡(cSt) 미만인 것은 고온 사용 조건하에서 증발량이 과대하여 오일사용량을 증대 시키고, 10 센티스톡(cSt) 초과 시 저온에서의 점도증가가 심해 저온시동성을 저하시키는 문제점이 발생한다. The base oil used in that the kinematic viscosity of 3 to 10 cm Stock (cSt) range from 100 ℃ and not less than 3 inches long stock (cSt) to increase the oil amount by evaporation is excessive under high temperature operating conditions, greater than 10 inches stock (cSt) when a problem arises that the increased viscosity decreases the deep cold start at low temperatures. 상기 기유는 고정제 광유 및 합성유를 단독 또는 혼합 사용하고, 사용 함량은 78 ~ 90 중량% 범위로 사용하는 바, 상기 78 중량% 미만으로 사용 시 첨가제의 양이 과대하여 점도증가가 심하고, 특히 저온에서의 점도증가가 심한 문제점이 있으며, 90 중량% 초과 시 첨가제의 양이 과소하여 엔진오일로서의 제 기능을 발휘할 수 없다는 단점이 있다. The base oil is severe and the fixing agent in mineral oil and the use of single or mixed synthetic oils, the use amount is 78 to 90% by weight bars used in the range, increase in viscosity to the amount of the additive when used in less than the 78 wt.% Excess, in particular low-temperature there are severe problems increased viscosity at, there is a disadvantage to underestimate the amount of additive when more than 90% by weight can not exert the function of engine oil.

본 발명에서 사용하는 산화방지제는 엔진 오일의 산화 방지를 하는 특성이 있으며, 구체적으로 3-히드록시디페닐아민, 및 페닐-알파-나프틸아민 등 중에서 선택된 1 종 또는 2 종의 혼합물을 사용한다. Antioxidants used in the present invention and the characteristics of the anti-oxidation of the engine oil, in particular 3-hydroxydiphenyl-phenyl amine, and phenyl-a-naphthylamine is used alone or in mixture of two kinds selected from among alpha . 이러한 산화방지제는 0.05 ~ 3 중량% 범위를 사용하며, 0.05 중량% 미만으로 사용하면 산화방지성능이 약해지는 문제점이 발생하며, 3 중량% 초과하면 경쟁흡착, 금속부식 등의 부작용이 발생한다. These antioxidants are used, and a 0.05 to 3% by weight, 0.05% by weight, and when used under the problem becomes the oxidation preventing performance around occurs, if it exceeds 3% by weight and causes side effects such as competitive adsorption, metal corrosion.

본 발명에서 사용하는 청정제는 1 ~ 7 중량% 범위로 사용하며, 1 중량% 미만 사용 시 청정성이 미미하고, 7 중량% 경쟁 흡착 및 애쉬 생성 등의 문제점이 발생한다. The detergent used in the present invention, problems such as 1-7 and used as a weight% of 1 wt% to less than when using a minimal purity, and 7% by weight of competitive adsorption and ash generation occurs. 상기 청정제는 전염기가 400 이상인 칼슘술포네이트 또는 마그네슘술포네이트을 사용하며 전염기가가 400 미만 시 유효한 청정성을 발휘하기 위한 청정제의 양이 과다하여 애쉬의 양이 증대되는 문제점이 발생한다. The detergent used is calcium sulfonate or magnesium sulfonate or more infectious neyiteueul group 400, and the amount of detergent over to exert effective cleanliness during transmission group is less than 400 a problem arises that the amount of the ash increases.

본 발명에서 사용하는 점도지수향상제는 점도지수의 향상과 저온에서의 유동성 증대를 하는 특성이 있으며, 에틸렌-프로필렌 코폴리머, 폴리이소프렌-폴리스틸렌 코폴리머 및 수소화 스타이렌-아이소프렌 등 중에서 선택된 1 종 또는 2 종 이상의 혼합물을 사용하며, 그 사용량은 0.1 ~ 5.0 중량% 범위로 사용하고, 0.1 중량% 미만이면 저온유동성이 나빠져 저온에서의 시동성이 저하하고 5.0 중량% 초과 시 점도지수향상제의 전단에 의한 점도저하 및 산화에 의하여 점도가 상승하는 문제점이 발생한다. The viscosity index improver used in the present invention, the viscosity and the characteristic of the fluid increase in improving the low temperature of the indices, the ethylene-propylene copolymer, polyisoprene-polystyrene copolymer and hydrogenated styrene-ah one selected from such as isoprene or using two or more of the mixture, and the amount of use thereof is 0.1 to 5.0% by weight used in the range and, if it is less than 0.1% by weight deteriorates the low-temperature fluid viscosity due to the shear of the viscosity index improver degrade the startability at low temperature and more than 5.0% by weight a problem that the viscosity increases caused by oxidation and deterioration.

본 발명에서 사용하는 소포제는 0.0005 ~ 2 중량% 범위로 사용하며 0.005 미만으로 사용 시 유효하게 윤활유내의 기포발생의 억제를 할 수 없는 문제점이 있으며, 2 중량% 초과 하여 사용 시 소포성이 오히려 감소하거나, 윤활유에서 석출되는 문제점이 발생하며 상기 소포제로 실리콘, 및 폴리메타아크릴레이트 등 중에서 선택된 1 종 또는 2 종의 혼합물을 사용한다. Anti-foaming agent used in the present invention is 0.0005 ~ 2 as a weight percent and effectively when using a less than 0.005, and the problem can not be the suppression of the bubbling in the lubricating oil, 2 weight% to a vesicular during use but rather decreases or , caused a problem of precipitation in the lubricating oil and uses a mixture of one or two kinds selected from the group consisting of such as silicon, and poly-acrylates to the anti-foaming agent.

본 발명에서 사용하는 내마모제는 0.5 ~ 5 중량% 범위로 사용하며 0.5 중량% 미만으로 사용 시 하고 유효한 내마모 성능을 발휘할 수 없고, 5 중량% 초과 하여 사용 시 청정분산제와의 경쟁흡착으로 슬러지 발생, 내마모성 저하등의 문제점이 발생하며, 1차 아연-디알킬디티오포스페이트와 2차 아연-디알킬디티오포스페이트를 2 : 1 중량비로 혼합하여 사용하는데 상기 중량비가 2 : 1 미만 시 초기 내마모방지성능이 저하되며, 2 : 1 초과 시 경쟁흡착으로 슬러지 생성 및 열화로 인해 내마모성이 조기에 저하되는 문제점이 발생한다. Antiwear agent used in the present invention is 0.5 to 5 can not exert during and abrasion resistance effective use to below and 0.5 weight% as a% by weight, the sludge generated by competitive adsorption of the cleaning dispersing agents when used in excess of 5% by weight, generating a problem such as wear resistance decreases, and the primary zinc dialkyl dithio phosphate as a secondary zinc dialkyl dithio phosphate to 2: the weight ratio in mixed using a 1 weight ratio of 2: 1 is less than when preventing initial wear-resistant this performance is lowered, 2: 1 and is a problem in that due to the degradation of sludge generation and the competitive adsorption wear resistance is reduced at an early stage it occurs when excess.

본 발명의 조성물의 제조 방법은 먼저 기유를 준비한 후 활성도가 낮은 첨가제부터, 동일 활성도라면 투여량이 적은 첨가제부터 투입한다. Production method of the present composition is first introduced from After preparing the base oil additives with low activities, from small amount of additive, if the same activity administration. 본 조성물의 경 우 준비한 기유에 소포제, 유동점강하제, 점도지수향상제, 산화방지제, 청정제의 순으로 투입한다. If anti-foaming agents, pour point depressants in base oils prepared by the present composition, the viscosity index improver will be added to, an antioxidant, an order of the detergent. 투입 후 70 ℃ 이상의 온도에서 교반기를 이용하여 교반하는데, 교반기의 크기와 설계치에 따라 교반기의 속도를 조정할 수가 있다. In After stirring for using a stirrer at a temperature of at least 70 ℃, it is possible to adjust the speed of the stirrer depending on the size and design values ​​of the agitator. 소형교반기의 경우 300 ~ 500 rpm으로 대형교반기의 경우는 100 ~ 400 rpm으로 교반하여 조성물을 제조 한다. On the small agitator for a large stirrer to 300 ~ 500 rpm was prepared by stirring the composition into 100 ~ 400 rpm.

이하, 본 발명을 다음의 실시예에 의거하여 더욱 상세히 설명하겠는바 본 발명이 실시예에 한정되는 것은 아니다. Or less, on the basis of the present invention the following examples are not according to the present invention hagetneun bar described in detail as limited to the embodiments.

실시예 1 ~ 2 및 비교예 1 ~ 3 Examples 1-2 and Comparative Examples 1-3

아래 표 1에 나타낸 성분들을 온도 70 ℃, 교반기의 속도 400 rpm인 조건하에서 혼합하여 조성물을 제조하였다. Below the temperature of the components shown in Table 1 70 ℃, the a mixture under the conditions of the stirrer speed 400 rpm composition was prepared. 실시예 1 ~ 2, 및 비교예 1 ~ 3 의 물성을 측정하여 그 결과를 표 2 에 나타내었다. Examples 1-2 and Comparative Examples 1-3 The physical properties by measuring the results are shown in Table 2.

Figure 112006057853031-pat00001

시험예 Test Example

1. 동점도: ASTM D 445 방법에 의해 측정하였다. It was measured by the ASTM D 445 method: 1. kinematic viscosity.

2. 전산가: ASTM D 664방법에 의해 측정하였다. It was measured by the ASTM D 664 method: 2. jeonsanga.

3. 전알칼리가: ASTM D 2893방법에 의해 측정하였다. 3. Before the alkali was measured by the ASTM D 2893 method.

4. 금속 마모분 : ASTM D 4951방법에 의해 측정하였다. It was measured by the ASTM D 4951 method: 4. The metal abrasion.

Figure 112006057853031-pat00002

상기 시험결과로부터 1차 아연-디알킬디티오포스페이트, 2차 아연-디알킬디티오포스페이트, 산화방지제를 적절히 조합하여 사용한 결과 신유대비 동점도의 변화량이 작고 전산가의 상승폭도 작다는 것을 알 수 있다. From the test results primary zinc dialkyl dithio phosphate, secondary zinc-a dialkyl dithio phosphate, the amount of change in the result healing compared with by appropriately combining the antioxidant dynamic viscosity can be seen that smaller and smaller also rise in jeonsanga. 또한 금속마모분 분석결과 실시예 1,2의 경우 현저히 낮은 수준으로 벨브 웨어에도 우수한 성능을 나타내고 있다. Also shows excellent performance, even with much lower in the case of Example 1 and 2 result metal abrasion analysis valve wear. 특히 실시예 2의 마모가 실시예 1번보다 더 낮은 결과를 보여주고 있다. In particular, the wear of the embodiment example 2 show a lower result than in Example 1. 그리고 기존의 페놀계를 산화방지제로 사용한 비교예 1 ~ 3의 경우 전산가가 100 %이상 증가되고 전알카리가의 경우도 급격히 떨어져 사용불가능한 수준 이며, 철 및 구리 마모분도 200 ppm 이상으로 마모가 심하게 진행됨을 알 수 있다. And in the case of conventional comparative example in which the phenolic in the antioxidant 1-3 jeonsanga is more than 100% and before the case of the alkali is a diagram level not available drops significantly, a minute iron and copper wear proceeds badly worn more than 200 ppm the can be seen.

따라서 본 발명으로 엔진오일을 제조하면 내산화력이 크게 향상되어 수명이 늘어나며 벨브 시트 마모방지성능이 우수해 최적의 벨브 리세션 성능을 유지하는 천연가스 기관 엔진에 사용되는 윤활유에 적용할 수 있다. Therefore, it is possible to manufacture by the invention when the engine oil significantly increases this leads to greater visibility within the oxidizing power is excellent in valve seat wear-resistant life performance as applied to a lubricating oil used in the natural gas combustion engine to maintain the optimum valve recession performance.

상기에서 상술한 바와 같이, 본 발명에 따르면, 천연가스 기관용 엔진오일 조성물은 내산화력이 크게 향상 되고, 내마모성이 뛰어나 자동차 등 천연가스 기관에 사용하는 엔진 오일에 적용 할 수 있다. As described above, in the above, according to the present invention, a natural gas engine oil institutions composition can be applied to the motor oil used in the natural gas engine, such as within the oxidizing power is greatly improved, and excellent wear resistance car.

Claims (7)

  1. 기유, 산화방지제, 청정제, 점도지수 향상제, 소포제를 포함하여 이루어진 압축 천연가스 기관용 엔진오일 조성물에 있어서, In the base oil, antioxidants, detergents, viscosity index improvers, compressed natural gas institutions engine oil composition comprising an anti-foaming agent,
    상기 천연가스 엔진오일 조성물에, 1차 아연-디알킬디티오포스페이트와 2차 아연-디알킬디티오포스페이트가 2 : 1 중량비로 혼합된 내마모제 0.5 ~ 5 중량%를 함유하여 이루어진 것을 특징으로 하는 압축 천연가스 기관용 엔진오일 조성물. To the natural gas engine oil composition, a primary zinc dialkyl dithio phosphate as a secondary zinc dialkyl dithio phosphate, 2: an antiwear agent compression, characterized in that made in containing 0.5 to 5% by weight mixed with 1 weight ratio natural gas engine oil composition institutions.
  2. 제 1 항에 있어서, According to claim 1,
    기유 78 ~ 90 중량%, 산화방지제 0.05 ~ 3 중량%, 청정제 1 ~ 7 중량%, 점도 지수 향상제 0.1 ~ 5.0 중량%, 소포제 0.0005 ~ 2 중량% 및 1차 아연-디알킬디티오포스페이트와 2차 아연-디알킬디티오포스페이트가 2 : 1 중량비로 혼합된 내마모제 0.5 ~ 5 중량%를 포함하여 이루어지는 것을 특징으로 하는 압축 천연가스 기관용 엔진오일 조성물. Base Oil 78 to 90% by weight, 0.05 to 3% by weight antioxidant, detergent 1 ~ 7% by weight, a viscosity index improver 0.1 to 5.0% by weight, anti-foaming agents 0.0005 to 2% by weight and a primary zinc dialkyl dithio phosphate as a secondary zinc dialkyl dithio phosphate, 2: 1 by weight antiwear agent mixed in compression, characterized in that comprises a 0.5 to 5% by weight of natural gas engine oil composition institutions.
  3. 제 1 항 또는 제 2 항에 있어서, According to claim 1 or 2,
    상기 기유는 100 ℃ 에서 동점도가 3 ~ 10 cSt 이고, 점도지수가 100 이상인 고정제 광유 및 합성유를 단독 또는 혼합하여 사용하는 것을 특징으로 하는 압축 천연가스 기관용 엔진오일 조성물. The base oil having a kinematic viscosity is 3 ~ 10 cSt, and a viscosity CNG institutions engine oil composition characterized in that the index is used alone or in mixture of 100 or more fixatives mineral oil and synthetic oil in 100 ℃.
  4. 제 1 항 또는 제 2 항에 있어서, According to claim 1 or 2,
    상기 산화방지제는 3-히드록시디페닐아민, 및 페닐-알파-나프틸아민 중에서 선택된 1 종 또는 2종의 혼합물인 것을 특징으로 하는 압축 천연가스 기관용 엔진오일 조성물. The antioxidants include 3-hydroxydiphenyl-phenyl amine, and phenyl-alpha-naphthyl CNG institutions engine oil composition according to one or characterized in that the mixture of two kinds selected from amine.
  5. 제 1 항 또는 제 2 항에 있어서, According to claim 1 or 2,
    상기 청정제는 전염기가가 400 이상인 칼슘술포네이트, 및 마그네슘 중에서 선택된 1 종 또는 2종의 혼합물인 것을 특징으로 하는 압축 천연가스 기관용 엔진오일 조성물. The detergent is compressed natural gas institutions engine oil composition, characterized in that the transmission groups are calcium sulfonate, and a mixture of one kind or two kinds selected from not less than 400 magnesium.
  6. 제 1 항 또는 제 2 항에 있어서, According to claim 1 or 2,
    상기 점도지수 향상제는 에틸렌-프로필렌 코폴리머, 폴리이소프렌-폴리스틸렌 코폴리머 , 및 수소화 스타이렌-아이소프렌 중에서 선택된 1 종 또는 2 종 이상의 혼합물인 것을 특징으로 하는 압축 천연가스 기관용 엔진오일 조성물. The viscosity index improver is an ethylene-propylene copolymer, polyisoprene-polystyrene copolymers, and hydrogenated styrene-o compression according to one or characterized in that two or more kinds of mixtures selected from a polyisoprene natural gas engine oil composition institutions.
  7. 제 1 항 또는 제 2 항에 있어서, According to claim 1 or 2,
    상기 소포제는 실리콘, 및 폴리메타아크릴레이트 중에서 선택된 1 종 또는 2 종의 혼합물인 것을 특징으로 하는 압축 천연가스 기관용 엔진오일 조성물. The antifoaming agent is silicone, and poly-compressed natural gas to the one or characterized in that the mixture of two kinds selected from the group consisting of acrylate institutions engine oil composition.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101080784B1 (en) * 2008-11-03 2011-11-07 현대자동차주식회사 Gasoline engine oil compositions

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08302378A (en) * 1995-04-28 1996-11-19 Nippon Oil Co Ltd Engine oil composition

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08302378A (en) * 1995-04-28 1996-11-19 Nippon Oil Co Ltd Engine oil composition

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101080784B1 (en) * 2008-11-03 2011-11-07 현대자동차주식회사 Gasoline engine oil compositions

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