WO2012026399A1 - 内燃機関用潤滑油組成物 - Google Patents
内燃機関用潤滑油組成物 Download PDFInfo
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- WO2012026399A1 WO2012026399A1 PCT/JP2011/068747 JP2011068747W WO2012026399A1 WO 2012026399 A1 WO2012026399 A1 WO 2012026399A1 JP 2011068747 W JP2011068747 W JP 2011068747W WO 2012026399 A1 WO2012026399 A1 WO 2012026399A1
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- internal combustion
- lubricating oil
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- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M169/00—Lubricating 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
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- C10M141/00—Lubricating 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
- C10M141/10—Lubricating 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
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- C10M103/00—Lubricating compositions characterised by the base-material being an inorganic material
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- C10M105/08—Lubricating compositions characterised by the base-material being a non-macromolecular organic compound containing oxygen
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- C10M105/22—Carboxylic acids or their salts
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Definitions
- the present invention relates to a lubricating oil composition for an internal combustion engine, and more particularly to a lubricating oil composition for an internal combustion engine having excellent fuel economy and high-temperature deposit prevention performance.
- Lubricating oils for internal combustion engines such as automobiles have roles such as lubrication and cooling inside the engine, and clean dispersion of combustion products.
- Lubricants for internal combustion engines are being studied and used.
- Fuel-saving type lubricating oil for internal combustion engines improves the fuel consumption of internal combustion engines by reducing the friction generated inside the engine.
- molybdenum as an additive (friction modifier) that reduces friction.
- organic molybdenum friction modifiers such as dithiocarbamate.
- a lubricant for an internal combustion engine in which an organic molybdenum friction modifier is blended has poor oxidation stability at high temperatures, and high temperature deposits are likely to occur.
- recent lean burn engines, direct injection engines, and the like are more efficient than conventional engines, and the combustion temperature tends to rise, so the problem due to the occurrence of high-temperature deposits is increasing.
- Patent Document 1 discloses a mineral oil and / or synthetic oil having a kinematic viscosity of 1.5 to 13 cSt (100 ° C.) as a base oil, and (A) a mineral oil and / or a synthetic oil having a kinematic viscosity of 16 to 45 cSt (100 ° C.).
- a multigrade engine oil composition for a turbocharged engine is disclosed, which contains 3 to 40% by mass and (B) 0.5 to 15% by mass of a viscosity index improver as essential components.
- Patent Document 2 has a kinematic viscosity at 100 ° C.
- a lubricating oil composition for an internal combustion engine is disclosed in which a lubricating oil component is used as a base oil. Further, paragraphs [0021] to [0026] of Patent Document 2 disclose that an organic molybdenum compound can be used as a friction modifier.
- the problem to be solved by the present invention is to provide a lubricating oil composition for an internal combustion engine having high temperature deposit prevention performance while maintaining excellent fuel economy.
- the present inventors diligently studied, and by blending a lubricating oil composition for an internal combustion engine with an organic molybdenum compound and a plurality of base oils having a specific viscosity, it is possible to provide excellent fuel economy performance and high temperature deposit prevention performance.
- the headline, the present invention has been reached. That is, the present invention includes an organic molybdenum compound as the component (A), a base oil having a kinematic viscosity at 100 ° C. of 25 mm 2 / sec or more as the component (B), and a kinematic viscosity at 100 ° C. of 12.5 mm 2 as the component (C).
- a lubricating oil composition for an internal combustion engine comprising a base oil of less than / sec, a kinematic viscosity at 100 ° C. of 5 mm 2 / sec to 12.5 mm 2 / sec and a phosphorus content of 800 ppm or less is there.
- the effect of the present invention is to provide a lubricating oil composition for an internal combustion engine having high temperature deposit prevention performance while maintaining excellent fuel economy.
- the lubricating oil composition for internal combustion engines of the present invention contains an organomolybdenum compound as the component (A), and any organomolybdenum compound can be used as long as it is a known organomolybdenum compound.
- organomolybdenum compound such as carbamate, molybdenum dithiophosphate, JP-B-5-62639, etc.
- R 1 R 2 R 3 N are each a hydrogen atom or a hydrocarbon group having 1 to 30 carbon atoms and may be the same or different, and R 1 , R 2 , R 3 Oil-soluble molybdenum compounds obtained by reacting amino compounds having a total number of carbon atoms of 4 or more), JP-B-4-30959, etc.
- a phosphorus compound containing phosphorus and sulfur [(a) at least one hexavalent molybdenum compound; and (b) an alkali sulfide represented by hydrogen sulfide, alkali hydrosulfide or M 2 S (M is an alkali metal or ammonium group) At least one selected compound; (c) (X 1 , X 2 , Y 1 and Y 2 may be the same or different at an oxygen or sulfur atom, n is 0 or 1, and R 1 and R 2 may be the same or different at an organic residue.
- molybdenum dithiocarbamate represented by the following general formula (1) is preferable because of its large friction reducing effect: (Wherein R 1 to R 4 represent a linear or branched alkyl group or alkenyl group having 4 to 18 carbon atoms, and X 1 to X 4 represent an oxygen atom or a sulfur atom.)
- R 1 to R 4 in the general formula (1) are linear or branched alkyl or alkenyl groups having 4 to 18 carbon atoms.
- Examples of such groups include butyl, isobutyl, and tertiary butyl groups.
- R 1 to R 4 may be the same or different.
- the organic molybdenum compound may be one kind or a mixture of two or more kinds, and the amount of the lubricating oil composition for an internal combustion engine of the present invention is not specified, but if the amount is small, the friction reducing effect may not be obtained. Yes, and if the addition amount is too large, high temperature deposits exceeding the effect of the high temperature deposit prevention performance of the lubricating oil composition for internal combustion engines of the present invention may occur, so the lubricating oil composition for internal combustion engines of the present invention It is preferable to add molybdenum in an amount of 200 to 2000 ppm, more preferably 200 to 1500 ppm, and still more preferably 300 to 1000 ppm.
- the component (B) used in the present invention is a base oil having a kinematic viscosity at 100 ° C. of 25 mm 2 / sec or more.
- a base oil a mineral base oil, a synthetic base oil, or a mixed oil thereof is used.
- the mineral oil base oil include paraffinic mineral oil and naphthenic mineral oil, and these solvent refined oil, hydrotreated oil, wax isomerized oil and the like may be used.
- the synthetic base oil for example, poly ⁇ olefin, polyisobutylene (polybutene), diester, polyol ester, polyphenyl ether and the like can be used.
- paraffinic mineral oils such as bright stock and high-viscosity polyalphaolefins are preferable.
- the kinematic viscosity at 100 ° C. must be 25 mm 2 / sec or more, preferably 25 to 100 mm 2 / sec, more preferably Is 25 to 80 mm 2 / sec, more preferably 30 to 60 mm 2 / sec.
- the kinematic viscosity at 100 ° C. is less than 25 mm 2 / sec, the high-temperature deposit prevention performance is not sufficiently exhibited.
- the viscosity is too high, handling may be difficult, and it may take time to mix uniformly, so the kinematic viscosity is preferably 100 mm 2 / sec or less.
- the blending amount of the component (B) is not particularly specified, but if the blending amount is too small, the effect of preventing high-temperature deposits may not be exhibited. If the blending amount is too large, the lubricating oil composition for an internal combustion engine of the present invention may be used. In some cases, it becomes difficult to make the kinematic viscosity at 100 ° C. of the product 12.5 mm 2 / sec or less, or the low temperature viscosity increases and the fuel saving effect may be reduced. Therefore, the blending amount of component (B) is preferably 1 to 30% by mass, more preferably 3 to 25% by mass, and more preferably 5 to 20% by mass with respect to the total amount of the lubricating oil composition for internal combustion engines of the present invention. Further preferred.
- the component (C) used in the present invention is a base oil having a kinematic viscosity at 100 ° C. of less than 12.5 mm 2 / sec.
- base oils mineral base oils, synthetic base oils or mixed oils thereof can be used.
- base oils include paraffinic mineral oils, naphthenic mineral oils, and solvent refined treated oils of these mineral oils. , Hydrotreated oils or wax isomerized treated oils, or mineral oil base oils such as mineral oils obtained by combining a plurality of these treatments; synthetic oils such as poly- ⁇ -olefins and polyisobutylenes.
- the kinematic viscosity of component (C) is 12.5 mm 2 / sec or more, a lubricating oil composition within the kinematic viscosity range defined in the present invention cannot be produced. Moreover, even if the kinematic viscosity of component (C) is less than 12.5 mm 2 / sec, if the base oil is too high, the amount of high-viscosity base oil that can be added is reduced, so the generation of high-temperature deposits is efficient. In some cases, it cannot be reduced well, or the low-temperature viscosity of the lubricating oil composition for an internal combustion engine of the present invention increases to reduce the fuel saving effect. Therefore, the kinematic viscosity at 100 ° C. of component (C) is preferably 1 to 11 mm 2 / sec, more preferably 2 to 8 mm 2 / sec, and further preferably 2 to 5 mm 2 / sec. .
- the viscosity index of component (C) is preferably 100 or more, more preferably 110 or more, and even more preferably 120 or more.
- the viscosity index of the low-viscosity base oil is less than 100, the low-temperature viscosity of the lubricating oil composition for internal combustion engines, which is the final product, may increase, and the fuel saving effect may not be obtained.
- Component (C) is blended so that the kinematic viscosity at 100 ° C. of the lubricating oil composition for internal combustion engines of the present invention blended with other additives is 5 mm 2 / sec to 12.5 mm 2 / sec. Specifically, it may be blended in an amount of 50 to 95% by mass, preferably 60 to 85% by mass, based on the total amount of the lubricating oil composition of the present invention.
- the lubricating oil composition for an internal combustion engine of the present invention containing the components (A) to (C) must have a phosphorus content of 800 ppm or less. Phosphorus may be present in a trace amount in the base oil, but most is derived from a phosphorus-based additive added to the lubricating oil composition for internal combustion engines.
- phosphorus additives include metal-containing additives such as molybdenum dithiophosphate and zinc dithiophosphate; monooctyl phosphate, dioctyl phosphate, monooleyl phosphate, dioleyl phosphate, tributyl phosphate, triphenyl phosphate, tricresyl Extreme pressure agents such as phosphate, triphenyl phosphite, tributyl phosphite, tricresyl phosphite, thiophosphate ester; detergents such as calcium phosphate, magnesium phosphate, barium phosphate.
- metal-containing additives such as molybdenum dithiophosphate and zinc dithiophosphate
- phosphorus additives may be added alone or in combination of two or more, but the amount added must be 800 ppm or less as the amount of phosphorus. If it is 800 ppm or less, the amount of high-temperature deposit generated is hardly affected by the phosphorus concentration, but if the phosphorus concentration exceeds 800 ppm, the amount of high-temperature deposit generated will increase rapidly. However, if the phosphorus concentration is too low, it may be inferior in wear resistance and antioxidant properties as a lubricating oil for internal combustion engines. Therefore, it is preferable that phosphorus is present in a certain amount or more, and the specific phosphorus amount is 300 to 800 ppm. Preferably, 500 to 800 ppm is more preferable.
- the most suitable phosphorus compound to be added is zinc dithiophosphate having excellent wear resistance and antioxidant properties.
- the lubricating oil composition for internal combustion engines of the present invention has a kinematic viscosity at 100 ° C. of 5 mm 2 / sec to 12.5 mm 2 / sec. If it is less than 5 mm 2 / sec, the oil film may not be sufficiently formed and there is a risk of wear on the sliding surface. If it exceeds 12.5 mm 2 / sec, the oil film becomes too thick and friction loss increases, resulting in fuel saving performance. The problem that damages is generated.
- the high temperature deposit in the present invention refers to an insoluble matter resulting from the lubricating oil composition for an internal combustion engine, which is generated at a high temperature of 300 ° C. or 400 ° C. or higher. If such a high temperature deposit adheres to or accumulates on the inside of the engine or on the bearings of the turbocharger, there is a risk that the performance of the engine or the turbocharger may deteriorate or trouble may occur.
- the greatest feature of the lubricating oil composition for internal combustion engines of the present invention is that the amount of high-temperature deposit generated is small.
- any test can be used as long as it is a publicly known test.
- the TEOST33C test (ASTM D6335) adopted in ILSAC (International Lubricant Standardization and Approval Committee) It is preferable to evaluate.
- the lubricating oil composition for an internal combustion engine of the present invention is a viscosity index improver, pour point depressant, extreme pressure agent, oiliness improver, antioxidant, metallic detergent, It is preferable to add one or more additives such as an ash dispersant, a metal deactivator, a rust inhibitor and an antifoaming agent. When these additives are blended, special care must be taken so that the phosphorus content with respect to the total amount of the lubricating oil composition for an internal combustion engine is 800 ppm or less, preferably 300 to 800 ppm.
- viscosity index improver examples include poly (C1-18) alkyl methacrylate, (C1-18) alkyl acrylate / (C1-18) alkyl methacrylate copolymer, diethylaminoethyl methacrylate / (C1-18) alkyl methacrylate copolymer And ethylene / (C1-18) alkyl methacrylate copolymer, polyisobutylene, polyalkylstyrene, ethylene / propylene copolymer, styrene / maleic ester copolymer, styrene / isoprene hydrogenated copolymer, and the like. .
- a dispersion type or multifunctional viscosity index improver imparted with a dispersion performance may be used.
- the weight average molecular weight is about 10,000 to 1,500,000, preferably about 30,000 to 1,000,000.
- the preferred blending amount of these viscosity index improvers is 0.1 to 20% by mass with respect to the lubricating oil composition for internal combustion engines. More preferably, it is 0.3 to 15% by mass.
- pour point depressant examples include polyalkyl methacrylate, polyalkyl acrylate, polyalkyl styrene, polyvinyl acetate and the like, and the weight average molecular weight is about 1000 to 100,000, preferably about 3,000 to 80,000. .
- a preferred blending amount of these pour point depressants is 0.005 to 3% by mass, more preferably 0.01 to 2% by mass, based on the lubricating oil composition for an internal combustion engine.
- extreme pressure agents include sulfur additives such as sulfurized fats and oils, olefin polysulfides, and dibenzyl sulfide; phosphorus compounds such as monooctyl phosphate, tributyl phosphate, triphenyl phosphite, tributyl phosphite, and thiophosphate
- An organic metal compound such as a thiophosphate metal salt, a thiocarbamic acid metal salt, and an acidic phosphate metal salt;
- a preferable blending amount of these extreme pressure agents is 0.01 to 2% by mass, more preferably 0.05 to 1% by mass with respect to the lubricating oil composition for an internal combustion engine.
- oiliness improvers include higher alcohols such as oleyl alcohol and stearyl alcohol; fatty acids such as oleic acid and stearic acid; esters such as oleyl glycerin ester, steryl glycerin ester and lauryl glycerin ester; lauryl amide and oleyl Amides such as amide and stearylamide; amines such as laurylamine, oleylamine and stearylamine; ethers such as laurylglycerol ether and oleylglycerol ether.
- a preferred blending amount of these oiliness improvers is 0.1 to 5% by mass, more preferably 0.2 to 3% by mass, based on the lubricating oil composition for an internal combustion engine.
- antioxidants examples include 2,6-di-tert-butylphenol (hereinafter, tertiary butyl is abbreviated as t-butyl), 2,6-di-t-butyl-p-cresol, 2,6 -Di-t-butyl-4-methylphenol, 2,6-di-t-butyl-4-ethylphenol, 2,4-dimethyl-6-t-butylphenol, 4,4'-methylenebis (2,6- Di-t-butylphenol), 4,4′-bis (2,6-di-t-butylphenol), 4,4′-bis (2-methyl-6-t-butylphenol), 2,2′-methylenebis ( 4-methyl-6-t-butylphenol), 2,2'-methylenebis (4-ethyl-6-t-butylphenol), 4,4'-butylidenebis (3-methyl-6-t-butylphenol), 4,4 ' Isopropylidenebis (2,6-di-t-buty
- metal detergents examples include sulfonates such as calcium, magnesium, and barium, phenates, salicylates, phosphates, and overbased salts thereof.
- overbased salts are preferable, and among the overbased salts, those having a TBN (total basic number) of 30 to 500 mgKOH / g are more preferable.
- salicylate-based detergents having no phosphorus and sulfur atoms are preferred.
- a preferable blending amount of these metallic detergents is 0.5 to 10% by mass, more preferably 1 to 8% by mass, based on the lubricating oil composition for an internal combustion engine.
- ashless dispersant examples include succinimides, succinic acid esters, benzylamines, and boron-modified products thereof to which an alkyl group or alkenyl group having a weight average molecular weight of about 500 to 3000 is added.
- the preferred blending amount of these ashless dispersants is 0.5 to 10% by mass, more preferably 1 to 8% by mass, based on the lubricating oil composition for internal combustion engines.
- metal deactivator examples include benzotriazole, benzimidazole, benzothiazole, tetraalkylthiuram disulfide and the like.
- the preferred compounding amount of these metal deactivators is 0.01 to 3% by mass, more preferably 0.02 to 2% by mass, based on the lubricating oil composition for internal combustion engines.
- rust preventive examples include sodium nitrite, oxidized paraffin wax calcium salt, oxidized paraffin wax magnesium salt, beef tallow fatty acid alkali metal salt, alkaline earth metal salt or amine salt, alkenyl succinic acid or alkenyl succinic acid half ester (alkenyl Group having a molecular weight of about 100 to 300), sorbitan monoester, nonylphenol ethoxylate, lanolin fatty acid calcium salt and the like.
- a preferable blending amount of these rust preventives is 0.01 to 3% by mass, more preferably 0.02 to 2% by mass with respect to the lubricating oil composition for internal combustion engines.
- antifoaming agent examples include polydimethyl silicone, trifluoropropylmethyl silicone, colloidal silica, polyalkyl acrylate, polyalkyl methacrylate, alcohol ethoxy / propoxylate, fatty acid ethoxy / propoxylate, and sorbitan partial fatty acid ester.
- a preferable blending amount of these antifoaming agents is 0.001 to 0.1% by mass, more preferably 0.001 to 0.01% by mass with respect to the lubricating oil composition for an internal combustion engine.
- the lubricating oil composition for an internal combustion engine of the present invention can be used as a lubricating oil for any internal combustion engine such as a gasoline engine, a diesel engine, or a gas engine, and in particular, an engine for a gasoline engine. It can be suitably used as an oil.
- FIG. 1 is a schematic diagram of a TEOST33C testing machine.
- a specific test method is as follows. The rod (metal rod) (2) in the case (1) of the apparatus shown in FIG. 1 is heated and cooled to the temperature shown in FIG. A certain amount of test oil was allowed to flow into the rod (2) using a pump (3) from the reaction chamber (4) in which the test oil was stored.
- This process is defined as one cycle, and after repeating this cycle 12 times, the mass of the deposit (deposited matter) and the total amount of the test oil deposited by removing the rod are filtered through a filter, and the mass of the deposit in the test oil is measured. The total value of this mass was defined as the high temperature deposit amount.
- a certain amount of air containing moisture and nitrogen monoxide gas was blown into the test oil in the reaction chamber (4). As the moisture-containing air, air bubbled into 30 ml of water contained in a 50 ml flask was used.
- Test conditions Temperature: 200-480 ° C
- Test cycle 12 cycles
- Test time 9.5 minutes / 1 cycle (total test time 114 minutes)
- Test oil volume 106ml
- Catalyst Iron naphthenate (added to 100ppm test oil as iron content)
- Pump speed 0.49 ml / min
- N 2 O gas flow rate 3.5 ml / min
- Air flow rate 3.5 ml / min
- Viscosity index improver Polymethacrylate viscosity index improver
- Detergent Calcium salicylate (TBN280)
- Dispersant Polyalkenyl succinimide antioxidant: 1: 1 (mass ratio) of benzenepropanoic acid-3,5-bis (1,1-dimethyl-ethyl) -4-hydroxyoctyl ester and dioctyldiphenylamine
- Zinctyldiphenylamine Mixture zinc dithiophosphate: di-linear alkyl (mixture of 4 to 6 carbon atoms) zinc dithiophosphate (phosphorus content: 8.67%)
- Molybdenum dithiocarbamate R 1 to R 4 in the general formula (1) are a mixture of 8 or 13 carbon atoms, X 1 and X 2 are oxygen atoms, X 3 and X 4 are sulfur atoms (molybdenum content 17.5%)
- Table 3 The base oil used and its properties are as described in Table 3 below
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Abstract
Description
即ち、本発明は、(A)成分として有機モリブデン化合物、(B)成分として100℃の動粘度が25mm2/秒以上の基油、(C)成分として100℃の動粘度が12.5mm2/秒未満の基油を含有し、100℃の動粘度が5mm2/秒~12.5mm2/秒で、且つリン含量が800ppm以下であることを特徴とする内燃機関用潤滑油組成物である。
下記の表1および表2に示した配合表に従い、試験に使用した内燃機関用潤滑油組成物(試験油)を作成し、以下に示した方法でTEOST33C試験および省燃費性試験を実施し、結果を表1および表2に示した。なお、配合に使用した基油及びその性状は表3に示した。
ASTM D6335の試験方法に準拠し、TEOST33C試験機(Tannas Co.社製)を使用して試験を行った。図1は、TEOST33C試験機の概略図である。具体的な試験方法は、図1に示した装置のケース(1)内のロッド(金属棒)(2)を図2に示した温度になるように加熱および冷却しながら、ケース(1)内のロッド(2)に、試験油を貯留した反応室(4)からポンプ(3)を用いて一定量の試験油を流した。この工程を1サイクルとし、このサイクルを12回繰り返した後、ロッドを取り出して付着したデポジット(付着物)の質量並びに試験油全量をフィルターでろ過して試験油中のデポジットの質量を測定し、この質量の合計値を高温デポジット量とした。なお、反応室(4)内の試験油には、水分を含んだ空気と一酸化窒素ガスを一定量吹き込んだ。なお、水分を含んだ空気としては、空気を50mlのフラスコに入った30mlの水にバブリングさせたものを使用した。
詳しい試験条件を下記に示した:
(試験条件)
温度:200~480℃
テストサイクル:12サイクル
テスト時間:9.5分/1サイクル(全テスト時間114分)
試験油量:106ml
触媒:ナフテン酸鉄(鉄量として100ppm試験油に添加)
ポンプ速度:0.49ml/分
N2Oガス流量:3.5ml/分
空気流量:3.5ml/分
各試験油について、SRV試験機を用いて以下の条件で摩擦係数を測定した。摩擦係数が低いほど省燃費性が高いことを示す。
上部試験片:円柱状試験片(φ15×22mm、材質SUJ-2)
下部試験片:円盤状試験片(φ24×6.85mm、材質SUJ-2)
荷重:200N
振幅:1.0mm
サイクル:50Hz
測定温度:80℃
測定時間:15分
粘度指数向上剤:ポリメタクリレート系粘度指数向上剤
清浄剤:カルシウムサリシレート(TBN280)
分散剤:ポリアルケニルコハク酸イミド
酸化防止剤:ベンゼンプロパン酸-3,5-ビス(1,1-ジメチル-エチ
ル)-4-ヒドロキシオクチルエステルとジオクチルジフェニ
ルアミンの1:1(質量比)混合物
亜鉛ジチオホスフェート:ジ直鎖アルキル(炭素数4~6の混合物)ジチオ
リン酸亜鉛(リン含量:8.67%)
モリブデンジチオカルバメート:一般式(1)のR1~R4は炭素数8または
13の混合物、X1およびX2は酸素原子、
X3およびX4は硫黄原子(モリブデン含量
17.5%)
また、使用した基油およびその性状は以下の表3に記載の通りである:
Claims (5)
- (A)成分として有機モリブデン化合物、(B)成分として100℃の動粘度が25mm2/秒以上の基油、(C)成分として100℃の動粘度が12.5mm2/秒未満の基油を含有し、100℃の動粘度が5mm2/秒~12.5mm2/秒で、且つリン含量が800ppm以下であることを特徴とする内燃機関用潤滑油組成物。
- 内燃機関用潤滑油組成物全量に対して、(A)成分をモリブデン量として200~2000ppm、(B)成分を1~30質量%、(C)成分を50~95質量%含有していることを特徴とする請求項1に記載の内燃機関用潤滑油組成物。
- 粘度指数向上剤、流動点降下剤、極圧剤、油性向上剤、酸化防止剤、金属系清浄剤、無灰分散剤、金属不活性剤、防錆剤および消泡剤からなる群から選択される1種または2種以上の添加剤を含有してなることを特徴とする請求項1ないし3のいずれか1項に記載の内燃機関用潤滑油組成物。
- 極圧剤として亜鉛ジチオホスフェートを内燃機関用潤滑油組成物全量に対してリン含量として300~800ppm含有することを特徴とする請求項4記載の内燃機関用潤滑油組成物。
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US20040087452A1 (en) * | 2002-10-31 | 2004-05-06 | Noles Joe R. | Lubricating oil composition |
EP2479249B1 (en) * | 2003-02-21 | 2014-01-01 | Nippon Oil Corporation | Lubricating oil composition for transmissions |
US7465696B2 (en) * | 2005-01-31 | 2008-12-16 | Chevron Oronite Company, Llc | Lubricating base oil compositions and methods for improving fuel economy in an internal combustion engine using same |
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- 2011-08-19 CN CN201180041033.5A patent/CN103068955B/zh active Active
- 2011-08-19 EP EP11819862.1A patent/EP2610331B1/en active Active
- 2011-08-19 WO PCT/JP2011/068747 patent/WO2012026399A1/ja active Application Filing
- 2011-08-19 US US13/818,329 patent/US20130310289A1/en not_active Abandoned
- 2011-08-19 KR KR1020137003028A patent/KR20130108532A/ko not_active Application Discontinuation
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EP2832831A4 (en) * | 2012-03-26 | 2015-12-02 | Jx Nippon Oil & Energy Corp | LUBRICATING OIL COMPOSITION FOR INTERNAL COMBUSTION ENGINE |
US9359576B2 (en) | 2012-03-26 | 2016-06-07 | Jx Nippon Oil & Energy Corporation | Lubricating oil composition for internal combustion engine |
Also Published As
Publication number | Publication date |
---|---|
EP2610331A4 (en) | 2014-05-21 |
CN103068955A (zh) | 2013-04-24 |
JP2012046555A (ja) | 2012-03-08 |
CN103068955B (zh) | 2016-04-06 |
EP2610331B1 (en) | 2019-04-17 |
KR20130108532A (ko) | 2013-10-04 |
EP2610331A1 (en) | 2013-07-03 |
US20130310289A1 (en) | 2013-11-21 |
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