KR20180060699A - Engine oil composition of low rubbing - Google Patents

Engine oil composition of low rubbing Download PDF

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KR20180060699A
KR20180060699A KR1020160160496A KR20160160496A KR20180060699A KR 20180060699 A KR20180060699 A KR 20180060699A KR 1020160160496 A KR1020160160496 A KR 1020160160496A KR 20160160496 A KR20160160496 A KR 20160160496A KR 20180060699 A KR20180060699 A KR 20180060699A
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friction
sulfonate
engine oil
weight
oil composition
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KR1020160160496A
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Korean (ko)
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신경식
이승욱
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현대자동차주식회사
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Priority to KR1020160160496A priority Critical patent/KR20180060699A/en
Publication of KR20180060699A publication Critical patent/KR20180060699A/en

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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
    • 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
    • C10MLUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M125/00Lubricating compositions characterised by the additive being an inorganic material
    • C10M125/10Metal oxides, hydroxides, carbonates or bicarbonates
    • 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
    • C10M135/00Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing sulfur, selenium or tellurium
    • C10M135/08Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing sulfur, selenium or tellurium containing a sulfur-to-oxygen bond
    • C10M135/10Sulfonic acids or derivatives thereof
    • 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
    • C10N2020/00Specified physical or chemical properties or characteristics, i.e. function, of component of lubricating compositions
    • C10N2020/01Physico-chemical properties
    • C10N2020/02Viscosity; 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
    • C10N2020/00Specified physical or chemical properties or characteristics, i.e. function, of component of lubricating compositions
    • C10N2020/01Physico-chemical properties
    • C10N2020/055Particles related characteristics
    • C10N2020/06Particles of special shape or size
    • 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 properties 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
    • C10N2040/00Specified use or application for which the lubricating composition is intended
    • C10N2040/25Internal-combustion engines
    • C10N2230/06
    • C10N2240/10

Abstract

The present invention relates to a friction-reduced engine oil composition. More specifically, the present invention relates to a friction-reduced engine oil composition. By additionally using calcite, a sulfonate-based clean dispersant, a friction modifier, and an antioxidant in addition to base oil, it is possible to remarkably improve friction reduction effects and abrasion resistance under high load, thereby improving fuel efficiency of vehicles.

Description

마찰저감형 엔진오일 조성물{ENGINE OIL COMPOSITION OF LOW RUBBING}TECHNICAL FIELD [0001] The present invention relates to a friction-reducing engine oil composition,

본 발명은 마찰저감형 엔진오일 조성물에 관한 것으로, 보다 상세하게는 기유에 특히 칼사이트 및 설포네이트계 청정분산제를 최적의 적정비율로 혼합 사용함으로써 고 하중에서의 내마모성 및 마찰저감 효과를 크게 향상시킬 수 있으며, 자동차의 연비를 개선시킬 수 있는 마찰저감형 엔진오일 조성물에 관한 것이다.
The present invention relates to a friction-reducing engine oil composition, and more particularly to a friction-reducing engine oil composition capable of significantly improving abrasion resistance and friction reduction effect under high load by mixing calcite and sulfonate-based cleaner dispersant in an optimum ratio And is capable of improving the fuel economy of an automobile.

에너지의 효율적 이용과 지구온난화 방지를 위해 이산화탄소 등 자동차 배기가스에 대한 규제가 점점 엄격해지고 있으며, 이러한 환경규제에 대응하기 위해 각 자동차에서는 엔진구조의 변경 및 저마찰 엔진오일에 의한 연비향상을 목적으로 개발되고 있다.In order to efficiently use energy and to prevent global warming, regulations on automobile exhaust gas such as carbon dioxide are becoming increasingly strict. In order to cope with such environmental regulations, each automobile is designed to change the engine structure and improve fuel efficiency by low- Is being developed.

특히 엔진오일에 의한 연비향상은 자동차의 크랭크 기구 또는 각종 엔진 부위에 윤활, 내마모 및 마찰저감 기능을 부여하여 달성할 수 있다. 이러한 엔진오일에서 요구되는 성능을 향상시키기 위해서는 적당한 점도특성, 고 하중에서의 윤활 성능인 극압성, 산화안정성 및 마찰 특성을 모두 고려하여 기유 및 첨가제들이 알맞게 배합되어야 한다. Particularly, improvement in fuel efficiency by the engine oil can be achieved by imparting lubrication, abrasion resistance and friction reduction function to a crank mechanism or various engine parts of an automobile. In order to improve the performance required for such engine oil, base oils and additives should be appropriately blended in consideration of appropriate viscosity characteristics, extreme pressure characteristics such as lubrication performance at high load, oxidation stability, and friction characteristics.

일반적으로 엔진오일에 의한 연비 향상은 엔진오일의 전동(Drag Torque) 저감과 습동 부위의 마찰저감이다. 그러나, 엔진오일의 점도를 낮추면 전동을 저감 시킬 수 있으나 습동부위의 마찰, 마모는 증가되는 경향이 있다. 또한, 내연기관은 장시간 운행함에 따라 각 운동 부위에서 마찰이 일어나므로 실린더의 내벽, 실린더 링, 베어링, 벨트 등 엔진내부에 부분적인 혹은 집중화된 마모부위가 발생하며 심한 경우 국부적인 파손현상이 발생할 수 있다. Generally, improvement of fuel efficiency by engine oil is reduction of drag torque of engine oil and friction reduction of sliding portion. However, lowering the viscosity of the engine oil can reduce the electric power, but the friction and wear on the sliding portion tends to increase. In addition, since the internal combustion engine is operated for a long time, friction occurs at each of the moving parts, so that a partial or centralized abrasion occurs in the inner wall of the cylinder, the cylinder ring, the bearing, and the belt. have.

종래 한국공개특허 제2015-0037019호에서는 베이스 오일에 청정분산제, 산화방지제, 극압제, 소포제, 점도지수 향상제 및 마찰조정제를 포함하는 엔진오일 조성물이 개시되어 있으나, 마찰저감 효과가 떨어지는 문제점이 있으며, 금속과의 흡착력이 좋지 않아 형성된 피막이 쉽게 분리되어 첨가제 소모가 많고, 이로 인해 수명이 단축되는 문제가 있다.Korean Patent Laid-Open Publication No. 2015-0037019 discloses an engine oil composition containing a clean dispersant, an antioxidant, an extreme pressure agent, a defoamer, a viscosity index improver, and a friction modifier in a base oil. However, There is a problem that the formed film is easily separated due to poor adsorption ability with metals, consumes a large amount of additive, resulting in a shortened life span.

이러한 저점도화에 의한 습동부위의 마모발생을 보안할 수 있는 새로운 엔진오일 개발에 대한 요구가 증대되고 있는 실정이다.
There is a growing demand for the development of a new engine oil which can secure the wear on the sliding portion due to such low viscosity.

한국공개특허 제2015-0037019호Korean Patent Publication No. 2015-0037019

따라서, 본 발명은 상기와 같은 문제점을 해결하기 위하여 창출한 것으로, 기유에 특히 칼사이트 및 설포네이트계 청정분산제를 최적의 적정비율로 혼합 사용함으로써 고 하중에서의 내마모성 및 마찰저감 효과를 크게 향상시킬 수 있으며, 자동차의 연비를 개선시킬 수 있는 엔진오일 조성물을 제공하는데 그 목적이 있다.
SUMMARY OF THE INVENTION Accordingly, the present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to improve the abrasion resistance and friction reduction effect under high load by mixing calcite and sulfonate- And it is an object of the present invention to provide an engine oil composition which can improve the fuel economy of an automobile.

본 발명은 기유 90~98 중량%; 칼사이트(calcite) 0.15~0.45 중량%; 설포네이트계 청정분산제 1~5 중량%; 마찰조정제 0.01~3 중량%; 및 산화방지제 0.1~5 중량%;를 포함하는 엔진오일 조성물을 제공한다.
The present invention relates to a composition comprising 90 to 98% by weight of a base oil; From 0.15 to 0.45% by weight of calcite; 1 to 5% by weight of a sulfonate-based clean dispersant; 0.01 to 3% by weight of a friction modifier; And 0.1 to 5% by weight of an antioxidant.

본 발명에 따른 엔진오일 조성물은 기유에 특히 칼사이트 및 설포네이트계 청정분산제를 최적의 적정비율로 혼합 사용함으로써 고 하중에서의 내마모성 및 마찰저감 효과를 크게 향상시킬 수 있으며, 이로 인해 자동차의 연비를 개선할 수 있다.
INDUSTRIAL APPLICABILITY The engine oil composition according to the present invention can greatly improve the wear resistance and friction reduction effect at high loads by mixing the base oil and the clean dispersant, particularly the calcite and sulfonate based dispersant at an optimum ratio, Can be improved.

이하에서는 본 발명을 하나의 실시예로 더욱 상세하게 설명한다.Hereinafter, the present invention will be described in more detail with reference to one embodiment.

본 발명은 고 하중에서의 윤활성능을 향상시킬 수 있는 가솔린, 혹은 디젤용 엔진오일의 조성물에 관한 것으로써, 윤활성능을 향상시켜 내마모성 및 마찰저감 효과를 향상시키고, 자동차의 연비향상을 증대시키기 위해 기존의 엔진오일에 칼사이트(Calcite) 및 설포네이트계 청정분산제를 최적의 적정비율로 혼합 사용한 마찰저감형 엔진오일 조성물을 제공하고자 하는 것이다. The present invention relates to a composition of an engine oil for gasoline or diesel which can improve lubrication performance under a high load, thereby improving lubricating performance and improving abrasion resistance and friction reduction effect, And to provide a friction-reduction type engine oil composition using a mixture of Calcite and a sulfonate-based cleaner dispersant at an optimum ratio in an existing engine oil.

본 발명의 마찰저감형 엔진오일 조성물은 기유, 칼사이트(calcite), 설포네이트계 청정분산제, 마찰조정제 및 산화방지제를 포함한다. The friction-reducing engine oil composition of the present invention includes a base oil, calcite, a sulfonate-based clean dispersant, a friction modifier, and an antioxidant.

보다 상세하게는 본 발명은 기유 90~98 중량%; 칼사이트(calcite) 0.15~0.45 중량%; 설포네이트계 청정분산제 1~5 중량%; 마찰조정제 0.01~3 중량%; 및 산화방지제 0.1~5 중량%;를 포함하는 엔진오일 조성물을 제공한다.More particularly, the present invention relates to a composition comprising 90 to 98% by weight of a base oil; From 0.15 to 0.45% by weight of calcite; 1 to 5% by weight of a sulfonate-based clean dispersant; 0.01 to 3% by weight of a friction modifier; And 0.1 to 5% by weight of an antioxidant.

본 발명의 바람직한 구현예에 의하면, 상기 기유는 100 ℃ 동점도가 3 ~ 10 cSt이고, 점도지수가 100~145인 광유 또는 합성유인 것을 단독 또는 혼합 사용할 수 있다. 상기 기유의 동점도가 3 cSt 보다 낮으면 고온 조건하에서 증발량이 과대하여 오일 사용량을 증대시키는 문제가 있고, 10 cSt 보다 높으면 저온에서의 점도 증가가 심해 저온 시 동성을 저하시키는 문제가 될 수 있다.According to a preferred embodiment of the present invention, the base oil may be a mineral oil or a synthetic oil having a kinematic viscosity at 100 ° C. of 3 to 10 cSt and a viscosity index of 100 to 145, alone or in combination. When the kinematic viscosity of the base oil is lower than 3 cSt, the amount of oil used is increased due to excessive evaporation under high temperature conditions. When the base oil viscosity is higher than 10 cSt, the increase in viscosity at low temperature may cause a problem of lowering the viscosity at low temperature.

상기 기유는 기어장치의 윤활에 사용하는 윤활유의 총칭이며, 부품간의 급속접촉을 방지하고, 마찰 및 마모를 저하시키는 것을 방지하는 역할을 할 수 있다.The base oil is a general term of lubricant used for lubricating the gear device, and can prevent rapid contact between parts and prevent friction and wear from being lowered.

상기 기유는 엔진오일 조성물 전체 중량에 대하여, 90~98 중량%를 함유할 수 있다. 이때, 그 함량이 90 중량% 보다 낮으면 다른 첨가제 성분들의 함량이 증가하여 점도증가 및 슬러지가 발생할 수 있고, 저온 및 고온에서의 점도가 과다하게 증가할 수 있다. 또한 98 중량% 보다 높으면 다른 첨가제 성분들의 함유량이 적어 엔진마모를 증가시키는 문제가 있다.The base oil may contain 90 to 98% by weight based on the total weight of the engine oil composition. If the content is less than 90% by weight, the content of other additive components may increase to increase viscosity and sludge, and the viscosity at low temperature and high temperature may increase excessively. On the other hand, if it is higher than 98% by weight, there is a problem that the content of other additive components is small and the engine wear is increased.

본 발명의 바람직한 구현예에 의하면, 상기 칼사이트(calcite)는 판상형의 구조로 전단에 강한 특성이 있어 엔진오일과 엔진 금속 부품과의 마찰면 표면에서 마모를 저감시킬 수 있으며, 마찰계수를 저감시킬 수 있다. 상기 칼사이트는 비정질(amorphous)의 탄산칼슘(CaCO3)이 미립화된 판상형 구조로 이루어지고, 평균 입자크기가 1~10 nm인 것을 사용할 수 있다. According to a preferred embodiment of the present invention, the calcite is a plate-like structure and has a strong shear property, so that wear on the surface of the friction surface between the engine oil and the engine metal part can be reduced and the friction coefficient can be reduced . The calcite site is composed of a plate-like structure in which amorphous calcium carbonate (CaCO 3 ) is finely divided, and an average particle size of 1 to 10 nm can be used.

이때, 평균 입자크기가 1 nm 보다 작으면 마찰면 표면에서의 마모 저감효과가 미비할 수 있고, 10 nm 보다 크면 엔진 오일 내에 분산이 되지 않고 침전될 수 있다. 바람직하게는 평균 입자크기가 2~6 nm인 것을 사용할 수 있으며, 더욱 바람직하게는 3~4 nm인 것을 사용할 수 있다.If the average particle size is less than 1 nm, the effect of reducing wear on the surface of the friction surface may be insufficient. If the average particle size is larger than 10 nm, the dispersion may not be dispersed in the engine oil. Preferably having an average particle size of 2 to 6 nm, more preferably 3 to 4 nm.

상기 칼사이트는 엔진오일 조성물 전체 중량에 대하여, 0.15~0.45 중량%를 함유할 수 있다. 이때, 그 함량이 0.15 중량% 보다 낮으면 마찰마모 개선효과가 미미할 수 있고, 0.45 중량% 보다 높으면 분산성에 악영향을 미쳐 마찰계수 및 마모가 급격하게 증가하여 내구성에 악영향을 줄 수 있다. 이러한 현상은 과도한 칼사이트 입자가 엔진 부품과의 마찰면 표면에서 마모를 저감시키는 것이 아닌 엔진오일 조성물 내부에서 불순물로 작용하여 오히려 내마모성을 악화시키는 경향이 있다. The knife site may contain 0.15 to 0.45% by weight based on the total weight of the engine oil composition. If the content is less than 0.15% by weight, the effect of improving friction and wear may be insignificant. If the content is higher than 0.45% by weight, the dispersibility may be adversely affected, and the coefficient of friction and abrasion may increase sharply, adversely affecting durability. This phenomenon tends to cause the excessive knife-edge particles to act as impurities in the engine oil composition rather than to reduce the wear on the friction surface with the engine component, rather than to deteriorate the wear resistance.

본 발명의 바람직한 구현예에 의하면, 상기 설포네이트계 청정분산제는 엔진오일의 산화 등에 의해 엔진 내부에 슬러지가 퇴적하여 윤활불량을 발생하는 것을 방지하기 위해 퇴적된 열화 생성물을 긁어내어 유중에 분산시키는 역할을 할 수 있다. 상기 설포네이트계 청정분산제는 칼슘설포네이트(Calcium Sulfonate), 붕산칼슘계 설포네이트 및 마그네슘설포네이트로 이루어진 군에서 선택된 1종 이상인 것을 사용할 수 있다. 특히 상기 설포네이트계 청정분산제를 사용하는 경우 설포네이트의 S 성분이 저마찰 첨가제인 몰리브덴계 화합물에 공급되어 금속 표면에 MoS 막을 더욱 용이하게 형성해줄 수 있으며, 이로써 마찰계수 및 마모흔을 저감하는 효과를 가져올 수 있다.According to a preferred embodiment of the present invention, the sulfonate-based clean dispersant has a role of scraping off the deposited deteriorated product and dispersing it in the oil in order to prevent sludge from accumulating in the engine due to oxidation of the engine oil or the like, can do. The sulfonate-based clean dispersant may be at least one selected from the group consisting of calcium sulfonate, calcium borate-based sulfonate, and magnesium sulfonate. In particular, when the sulfonate-based clean dispersant is used, the S component of the sulfonate is supplied to the molybdenum compound as the low-friction additive, so that the MoS film can be more easily formed on the metal surface, thereby reducing the friction coefficient and the abrasion marks Lt; / RTI >

본 발명의 바람직한 구현예에 의하면, 상기 마찰조정제는 엔진오일에 내구성을 부여하여 마찰을 저감시키기 위해 사용될 수 있다. 특히, 상기 마찰조정제로 몰리브데늄 디티오카바메이트(MoDTC), 몰리브데늄 디티오포스페이트(MoDTP) 또는 이들의 혼합물인 것을 사용할 수 있다. 상기 마찰조정제는 경계, 극압 윤활에서 금속과 반응하여 MoS 형태의 피막을 형성시켜 마찰계수를 낮추는 역할을 할 수 있다. 또한, 특히 다른 첨가제들과 반응하여 금속 표면에 윤활막 형성을 더욱 용이하게 하여 마찰마모 효과를 더욱 개선시킬 수 있다.According to a preferred embodiment of the present invention, the friction modifier can be used to reduce friction by imparting durability to engine oil. In particular, the friction modifier may be molybdenum dithiocarbamate (MoDTC), molybdenum dithiophosphate (MoDTP), or a mixture thereof. The friction modifier reacts with the metal in the boundary and extreme pressure lubrication to form a MoS type coating to lower the friction coefficient. In addition, it is possible to further improve the effect of friction and wear by making it easier to form a lubricating film on the metal surface by reacting with other additives.

상기 마찰조정제는 엔진오일 조성물 전체 중량에 대하여, 0.01~3 중량%을 함유할 수 있다. 이때, 함량이 0.01 중량% 보다 낮으면 내구성이 저하되어 마찰저감 효과가 미미할 수 있고, 3 중량% 보다 많으면 불순물이 많아 내구성을 악화 할 수 있다.The friction modifier may contain 0.01 to 3% by weight based on the total weight of the engine oil composition. If the content is less than 0.01% by weight, the durability may be lowered and the friction reducing effect may be insignificant. If the content is more than 3% by weight, impurities may be abundant and durability may be deteriorated.

본 발명의 바람직한 구현예에 의하면, 상기 산화방지제는 엔진오일의 산화를 방지하고, 마찰마모 효과를 향상시키기 위해 사용될 수 있다. 상기 산화방지제는 아릴아민계, 특히 C6~C12 알킬아릴 아민계 산화방지제를 사용하는 것이 바람직하다. According to a preferred embodiment of the present invention, the antioxidant can be used to prevent the oxidation of the engine oil and to improve the friction wear effect. The antioxidant is preferably an arylamine-based antioxidant, particularly a C 6 to C 12 alkylarylamine-based antioxidant.

이와 같이, 본 발명의 엔진오일 조성물은 기유에 특히 칼사이트 및 설포네이트계 청정분산제를 최적의 적정비율로 혼합 사용함으로써 고 하중에서의 내마모성 및 마찰저감 효과를 크게 향상시킬 수 있으며, 이로 인해 자동차의 연비를 개선할 수 있다.
As described above, the engine oil composition of the present invention can remarkably improve the abrasion resistance and friction reducing effect at high load by mixing the base oil and especially the calcite and sulfonate clean dispersant at an optimum proper ratio, Fuel efficiency can be improved.

이하 본 발명을 실시예에 의거하여 더욱 구체적으로 설명하겠는 바, 본 발명이 다음 실시예에 의해 한정되는 것은 아니다.
Hereinafter, the present invention will be described in more detail with reference to Examples, but the present invention is not limited by the following Examples.

실시예 1~12 및 비교예 1~13Examples 1 to 12 and Comparative Examples 1 to 13

하기 표 1, 2에 나타낸 조성성분과 함량비로 엔진오일을 제조하였다. 또한 상기 엔진오일에 대해 다음과 같은 방법으로 물성을 측정하였다.Engine oils were prepared with the compositional components and content ratios shown in Tables 1 and 2 below. The properties of the engine oil were measured in the following manner.

[물성측정방법][Measurement of physical properties]

(1) SRV 마찰평가: ASTM D6425 측정방법을 이용하여 측정하였다.(1) SRV Friction Evaluation: Measured using ASTM D6425 measurement method.

(2) 동점도 측정방법: ASTM D 445 측정방법을 이용하여 측정하였다.(2) Method of measuring kinetic viscosity: ASTM D 445 measurement method was used.

(3) 고온도전단점도 측정방법: ASTM D 4683 측정방법을 이용하여 측정하였다.
(3) High-temperature conductivity Disconnection degree measurement method: Measured using ASTM D 4683 measurement method.

Figure pat00001
Figure pat00001

Figure pat00002
Figure pat00002

상기 표 1, 2의 결과에 의하면, 상기 비교예 1~4, 11의 경우 칼사이트 입자의 함량이 0.15 중량% 보다 적거나, 0.45 중량% 보다 많은 경우 마찰계수의 수치가 과도하게 증가되거나, 마찰계수 및 마모흔의 수치가 동시에 급격히 증가하는 경향성을 보임을 확인하였다. 이는 과도한 함량의 칼사이트 입자로 인해 엔진오일 내부에서 불순물로 작용하여 내구성을 악화시키는 것을 알 수 있었다.According to the results of Tables 1 and 2, in the case of Comparative Examples 1 to 4 and 11, when the content of the knife-edge particles is less than 0.15 wt% or more than 0.45 wt%, the value of the friction coefficient is excessively increased, The coefficient and the number of the abrasive sharply increase at the same time. It was found that the excessive amount of calcite particles acted as impurities in the engine oil to deteriorate durability.

또한, 상기 비교예 6~10, 12 및 13의 경우 청정분산제의 사용량과 구성성분에 따라 마찰계수 및 마찰마모가 저하된 것을 확인하였다. 또한 청정분산제로 살리실레이트계를 사용하였을 때, 마찰 및 마모 특성에서 향상된 결과를 보이지 않는 것을 확인하였다.Further, in the case of Comparative Examples 6 to 10, 12 and 13, it was confirmed that the friction coefficient and the frictional wear were lowered depending on the amount and composition of the clean dispersant. In addition, when salicylate system was used as a clean dispersant, it was confirmed that no improved results were obtained in the friction and wear characteristics.

이에 반해, 상기 실시예 1~12의 엔진오일은 특히 마찰계수 및 마모흔의 수치가 상기 비교예 1~11에 비해 현저히 낮은 것으로 보아 연비 및 내구성측면에서 기존 엔진오일 대비 우수함을 확인할 수 있었다. On the other hand, the engine oils of Examples 1 to 12 were found to be superior to the conventional engine oils in terms of fuel economy and durability because the values of friction coefficient and abrasion marks were significantly lower than those of Comparative Examples 1 to 11.

이를 통해 칼사이트 입자만을 혼합하여도 약간의 마찰저감 및 내마모성 효과가 있음을 알 수 있으나, 설포네이트계 청정분산제를 혼합 사용할 때, 그 효과가 현저하게 향상되는 것을 알 수 있었다.As a result, it can be seen that even if only the calcite particles are mixed, there is little friction reduction and abrasion resistance effect, but it is found that the effect is remarkably improved when the sulfonate-based clean dispersant is mixed and used.

Claims (6)

기유 90~98 중량%;
칼사이트(calcite) 0.15~0.45 중량%;
설포네이트계 청정분산제 1~5 중량%;
마찰조정제 0.01~3 중량%; 및
산화방지제 0.1~5 중량%;
를 포함하는 엔진오일 조성물.
90 to 98 wt.% Base oil;
From 0.15 to 0.45% by weight of calcite;
1 to 5% by weight of a sulfonate-based clean dispersant;
0.01 to 3% by weight of a friction modifier; And
0.1 to 5% by weight of an antioxidant;
≪ / RTI >
제1항에 있어서,
상기 기유는 100 ℃ 동점도가 3~10 cSt이고, 점도지수가 100~145인 광유 또는 합성유인 것을 단독 또는 혼합 사용하는 것을 특징으로 하는 엔진오일 조성물.
The method according to claim 1,
Wherein the base oil is a mineral oil or a synthetic oil having a kinematic viscosity at 100 占 폚 of 3 to 10 cSt and a viscosity index of 100 to 145, either singly or in combination.
제1항에 있어서,
상기 칼사이트(calcite)는 비정질(amorphous)의 탄산칼슘(CaCO3)이 미립화된 판상형 구조로 이루어지고, 평균 입자크기가 1~10 nm인 것을 특징으로 하는 엔진오일 조성물.
The method according to claim 1,
The engine oil composition according to claim 1, wherein the calcite has a plate-like structure in which amorphous calcium carbonate (CaCO 3 ) is finely divided and has an average particle size of 1 to 10 nm.
제1항에 있어서,
상기 설포네이트계 청정분산제는 칼슘설포네이트(Calcium Sulfonate), 붕산칼슘계 설포네이트 및 마그네슘설포네이트로 이루어진 군에서 선택된 1종 이상인 것을 특징으로 하는 엔진오일 조성물.
The method according to claim 1,
Wherein the sulfonate-based clean dispersant is at least one selected from the group consisting of calcium sulfonate, calcium borate-based sulfonate, and magnesium sulfonate.
제1항에 있어서,
상기 마찰조정제는 몰리브데늄 디티오카바메이트(MoDTC), 몰리브데늄 디티오포스페이트(MoDTP) 또는 이들의 혼합물인 것을 특징으로 하는 엔진오일 조성물.
The method according to claim 1,
Wherein the friction modifier is molybdenum dithiocarbamate (MoDTC), molybdenum dithiophosphate (MoDTP) or a mixture thereof.
제1항에 있어서,
상기 산화방지제는 아릴아민계 산화방지제인 것을 특징으로 하는 엔진오일 조성물.
The method according to claim 1,
Wherein the antioxidant is an arylamine-based antioxidant.
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Publication number Priority date Publication date Assignee Title
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Publication number Priority date Publication date Assignee Title
KR20150037019A (en) 2013-09-30 2015-04-08 황기순 Composition of engine oil

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108102769A (en) * 2016-11-25 2018-06-01 现代自动车株式会社 The axle fluid composition of fuel efficiency and low viscosity with raising

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