CN108699482B - 润滑油组合物、润滑方法、和变速器 - Google Patents
润滑油组合物、润滑方法、和变速器 Download PDFInfo
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- CN108699482B CN108699482B CN201780013633.8A CN201780013633A CN108699482B CN 108699482 B CN108699482 B CN 108699482B CN 201780013633 A CN201780013633 A CN 201780013633A CN 108699482 B CN108699482 B CN 108699482B
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Classifications
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- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
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- C10M169/04—Mixtures of base-materials and additives
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- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
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- C10M2203/1006—Petroleum or coal fractions, e.g. tars, solvents, bitumen used as base material
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- C10M2203/1025—Aliphatic fractions used as base material
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- C10M2205/02—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers
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- C10M2209/084—Acrylate; Methacrylate
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- C10M2215/08—Amides
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- C10M2290/00—Mixtures of base materials or thickeners or additives
- C10M2290/02—Mineral base oils; Mixtures of fractions
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
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- C10M2290/00—Mixtures of base materials or thickeners or additives
- C10M2290/04—Synthetic base oils
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- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
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- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
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- C10N2020/02—Viscosity; Viscosity index
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- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
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Abstract
提供低粘度且具有省燃耗性的同时、能够在高温环境下使用、且具有优异的齿轮的耐咬粘性和抗颤振性的润滑油组合物,其包含(A)40℃运动粘度为5~15mm2/s、且闪点为180℃以上的矿物油、(B)40℃运动粘度为5~15mm2/s、且闪点为190℃以上的合成油、(C)酰胺化合物、和(D)多元醇酯化合物;使用其的润滑方法和变速器。
Description
技术领域
本发明涉及润滑油组合物、使用其的润滑方法和变速器。
背景技术
近年来,在对环境问题的意识提高的过程中,以石油资源的有效活用、CO2的排出削减为目的,在各技术领域中省燃耗化的要求逐渐严格。例如,对变速器中使用的润滑油组合物,对省燃耗化的要求也提高。
例如,专利文献1中,记载了包含至少1种具有规定性状的矿物油和聚α烯烃、至少1种另外的矿物油和聚α烯烃、聚甲基丙烯酸酯等的润滑油组合物。此外,专利文献2中,记载了包含具有规定性状的矿物油系基础油、单酯系基础油、亚磷酸酯、和硼化无灰分散剂的润滑油组合物。
现有技术文献
专利文献
专利文献1:日本特开2011-168677号公报
专利文献2:日本特开2014-159496号公报。
发明内容
发明要解决的课题
变速器之中,汽车用的变速器具备变矩器、湿式离合器、齿轮轴承机构、液压控制机构等,通过将用于这些的润滑油组合物低粘度化,减少了搅拌阻抗、摩擦阻抗,因此提高了动力的传递效率,其结果是能够实现省燃耗化。像这样,将变速器中使用的润滑油组合物低粘度化成为为了得到省燃耗化而有效的手段。
另一方面,伴随将润滑油组合物低粘度化,在金属部件表面难以形成充分的油膜,容易发生金属彼此的接触,因此有时因齿轮的咬粘而产生变速器的故障。此外,伴随低粘度化,发生闪点的降低,对于例如在变速器搭载于电动汽车、混合动力车时的高温环境下的使用,有时发生障碍。
此外,变矩器通过搅拌润滑油组合物而在吸收差速旋转的同时传递动力,但除了起动时之外,通过经由锁止离合器而直接传递动力,从而减少能量损失,实现省燃耗化。锁止离合器的控制除了直接接合之外,还进行在滑动的同时传递动力的滑动控制,如果润滑油组合物的摩擦特性不适当,则发生被称为颤振的自激振动。因此,通过提高润滑油组合物的抗颤振性,能够进行更精细的锁止离合器控制,能够实现省燃耗化,但该抗颤振性是仅通过润滑油组合物的低粘度化而无法实现的性能。
专利文献1中记载的润滑油组合物中,组合物的100℃运动粘度为5.5mm2/s以上且6.5mm2/s以下,无法称为充分低粘度化,对在省燃耗特性方面的更加严格的要求,产生无法充分应对的情况。此外,专利文献2中记载的润滑油组合物中,100℃运动粘度为2.5~4.0mm2/s,尽管实现了低粘度化,但无法同时满足锁止离合器的抗颤振性。
本发明鉴于上述情况而进行,目的在于,提供在低粘度下具有省燃耗性的同时、齿轮的耐咬粘性和高温环境下的使用性优异、且抗颤振性优异的润滑油组合物、使用其的润滑方法和变速器。
用于解决课题的手段
本发明人等进行反复深入研究的结果发现,通过下述的发明能够解决上述课题。即,本发明提供具有下述构成的润滑油组合物、使用其的润滑方法和变速器。
1.润滑油组合物,其包含(A)40℃运动粘度为5~15mm2/s、且闪点为180℃以上的矿物油、(B)40℃运动粘度为5~15mm2/s、且闪点为190℃以上的合成油、(C)酰胺化合物、和(D)多元醇酯化合物。
2.润滑方法,其中,使用上述1所述的润滑油组合物。
3.变速器,其使用上述1所述的润滑油组合物。
发明的效果
根据本发明,能够提供在低粘度下具有省燃耗性的同时、齿轮的耐咬粘性和高温环境下的使用性优异、且抗颤振性优异的润滑油组合物、使用其的润滑方法和变速器。
具体实施方式
以下,针对本发明的实施方式(以下有时称为“本实施方式”)进行说明。应予说明,本说明书中,涉及数值的记载的“~”这一术语是表示其下限值以上且上限值以下的术语,这些的下限值和上限值是能够任意组合的数值。
〔润滑油组合物〕
本实施方式的变速器用润滑油组合物包含(A)40℃运动粘度为5~15mm2/s、且闪点为180℃以上的矿物油(以下有时简称为(A)矿物油)、(B)40℃运动粘度为5~15mm2/s、且闪点为190℃以上的合成油(以下有时简称为(B)合成油)、(C)酰胺化合物、和(D)多元醇酯化合物。
<(A)矿物油>
(A)矿物油要求具有40℃运动粘度为5~15mm2/s、且闪点为180℃以上这一性状的矿物油。如果(A)矿物油不具有上述40℃运动粘度、以及闪点,则无法得到同时具备省燃耗性与齿轮的耐咬粘性、高温环境下的使用性和抗颤振性的润滑油组合物。
特别地,从省燃耗性的观点出发,(A)矿物油的40℃运动粘度优选为7~13mm2/s、更优选为8~12mm2/s、进一步优选为8.5~11mm2/s。从与此相同的观点出发,(A)矿物油的100℃运动粘度优选为2~5mm2/s、更优选为2~4mm2/s、进一步优选为2~3mm2/s。此外,粘度指数优选为90以上、更优选为100以上、进一步优选为110以上。
本说明书中,运动粘度、和粘度指数是按照JIS K 2283:2000使用玻璃制毛管式粘度计而测定的值。
此外,特别地,从高温环境下的使用性的观点出发,(A)矿物油的闪点优选为182℃以上、更优选为186℃以上。本说明书中,闪点是按照JIS K2265-4:2007通过COC法测定的值。
作为(A)矿物油,只要具有上述40℃运动粘度和闪点,则没有特别限制,可以举出例如石蜡基系矿物油、环烷基系矿物油、中间基系矿物油等。作为这些的矿物油,更具体而言,可以举出例如将石蜡基系、环烷基系、中间基系等原油进行常压蒸馏而得到的常压渣油;将该常压渣油进行减压蒸馏而得到的馏出油;将该馏出油进行溶剂脱沥青、溶剂萃取、加氢裂化、溶剂脱蜡、催化脱蜡、加氢精制等之中的1种以上处理而精制得到的矿物油;通过对利用费托法等制造的蜡(GTL蜡)进行异构化而得到的矿物油等。此外,(A)矿物油可以单独使用或者组合使用多种上述各种矿物油。
此外,作为矿物油,可以为在API(美国石油协会)的基础油类别中被分类为1类、2类、3类中任一者的矿物油,优选为被分类为2类、3类的矿物油。
(A)矿物油的组合物总量基准的含量优选为50~97质量%、更优选为55~95质量%、进一步优选为60~90质量%。通过将(A)矿物油的含量设为上述范围,容易同时得到省燃耗性与齿轮的耐咬粘性、高温环境下的使用性和抗颤振性。
<(B)合成油>
(B)合成油要求具有40℃运动粘度为5~15mm2/s、且闪点为190℃以上这一性状的合成油。如果(B)合成油不具有上述的40℃运动粘度、以及闪点,则无法得到同时具备省燃耗性与齿轮的耐咬粘性、高温环境下的使用性和抗颤振性的润滑油组合物。
特别地,从省燃耗性、和齿轮的耐咬粘性的观点出发,(B)合成油的40℃运动粘度优选为5~13mm2/s、更优选为5.5~11mm2/s、进一步优选为6~10mm2/s。从与此相同的观点出发,(B)合成油的100℃运动粘度优选为1~5mm2/s、更优选为1.5~4.5mm2/s、进一步优选为2~4mm2/s。此外,粘度指数优选为120以上、更优选为140以上、进一步优选为160以上。
此外,特别地,从高温环境下的使用性的观点出发,(B)合成油的闪点优选为195℃以上、更优选为200℃以上。
作为(B)合成油,只要具有上述40℃运动粘度和闪点,则没有特别限制,可以举出例如聚丁烯、乙烯-α-烯烃共聚物、α-烯烃均聚物或共聚物等聚α-烯烃、链烷烃油等烃系油;多元醇酯、二元酸酯、磷酸酯等各种酯油;聚乙烯基醚、聚苯醚、聚氧亚烷基二醇类(PAG)等各种醚油;烷基苯、烷基萘等芳族系油;聚二醇等。合成油可以单独使用或组合使用多种上述各种合成油。
(B)合成油的组合物总量基准的含量优选为3~50质量%、更优选为5~45质量%、进一步优选为8~30质量%、特别优选为10~25质量%。通过将(B)合成油的含量设为上述范围,容易同时得到省燃耗性与齿轮的耐咬粘性、高温环境下的使用性和抗颤振性。
<(C)酰胺化合物>
本实施方式的润滑油组合物包含(C)酰胺化合物。如果不含(C)酰胺化合物,则无法得到同时具备省燃耗性与齿轮的耐咬粘性、高温环境下的使用性和抗颤振性的润滑油组合物。
作为(C)酰胺化合物,只要是在分子中具有酰胺键(C(=O)-N)的化合物,则没有特别限制,可以举出例如胺化合物与羧酸化合物的反应产物。
作为胺化合物,可以优选举出例如碳原子数为4~30、优选为5~24、更优选为6~20、进一步优选为6~12的脂肪族多胺。此外,胺化合物中的氮原子数(源自-NH-基、-NH2基)优选为2~16、更优选为2~12、进一步优选为3~8。
作为这样的脂肪族多胺,可以举出例如六亚甲基二胺、二氨基庚烷、二氨基辛烷、二氨基壬烷、二氨基癸烷、二氨基十一烷、二氨基十二烷、二氨基十三烷、二氨基十四烷、二氨基十五烷、二氨基十六烷、二氨基十七烷、二氨基十八烷、二氨基十九烷、二氨基二十烷、二氨基二十一烷、二氨基二十二烷、二氨基二十三烷、二氨基二十四烷、二氨基二十五烷、二氨基二十六烷、二氨基二十七烷、二氨基二十八烷、二氨基二十九烷、二氨基三十烷等亚烷基二胺;己烯基二胺、庚烯基二胺、辛烯基二胺、壬烯基二胺、癸烯基二胺、十一碳烯基二胺、十二碳烯基二胺、十三碳烯基二胺、十四碳烯基二胺、十五碳烯基二胺、十六碳烯基二胺、十七碳烯基二胺、十八碳烯基二胺、十九碳烯基二胺、二十碳烯基二胺、二十一碳烯基二胺、二十二碳烯基二胺、二十三碳烯基二胺、二十四碳烯基二胺、二十五碳烯基二胺、二十六碳烯基二胺、二十七碳烯基二胺、二十八碳烯基二胺、二十九碳烯基二胺、三十碳烯基二胺等亚烯基二胺;二亚乙基三胺、二亚丙基三胺、二(甲基亚乙基)三胺、二亚丁基三胺、三亚丙基三胺、三(2-氨基乙基)胺、三亚乙基四胺、三亚丙基四胺、三亚丁基四胺、四亚乙基五胺、四亚丙基五胺、五亚乙基六胺、五亚丙基六胺、五亚丁基六胺、六亚乙基七胺、七亚乙基八胺、八亚乙基九胺、九亚乙基十胺等聚亚烷基多胺等。
这些之中,优选为亚烷基二胺、聚亚烷基多胺,更优选为聚亚烷基多胺,进一步优选为亚烷基为碳原子数为2~4的亚烷基的聚亚烷基多胺,特别优选为亚烷基为碳原子数为2的亚烷基、且总碳原子数为6~12的聚亚乙基多胺。
此外,聚亚烷基多胺的重复单元(-NH-(CH2)n-,n表示1以上的整数)部分可以形成为直链状、支链状、环状,优选为直链状。
作为羧酸化合物,可以优选举出例如碳原子数为6~30、优选为8~24、更优选为12~24、进一步优选为16~20的羧酸。羧酸化合物可以具有直链状、支链中任一者,此外,可以是饱和、不饱和中任一者。
作为这样的羧酸化合物,可以例如代表性地举出己酸、庚酸、辛酸、2-乙基己酸、壬酸、癸酸、月桂酸、十三烷酸、肉豆蔻酸、棕榈酸、十七烷酸、硬脂酸、异硬脂酸、花生酸、山嵛酸、木蜡酸等1元的饱和羧酸;肉豆蔻油酸、棕榈油酸、顺-6-十六碳烯酸(sapienic acid)、油酸、亚油酸、亚麻酸、鳕油酸、二十碳烯酸、二十碳二烯酸、芥酸、十二碳二烯酸等1元的不饱和羧酸等。
特别地,从得到优异的齿轮的耐咬粘性的观点出发,作为羧酸化合物,优选为饱和羧酸,更优选为碳原子数为16~20的饱和羧酸,更具体而言,进一步优选为硬脂酸、异硬脂酸、油酸、亚油酸、亚麻酸,特别优选为硬脂酸、异硬脂酸、和油酸。
(C)酰胺化合物的组合物总量基准的含量优选为0.001~0.5质量%、更优选为0.005~0.3质量%、进一步优选为0.01~0.2质量%、特别优选为0.01~0.1质量%。通过将(C)酰胺化合物的含量设为上述范围,容易同时得到省燃耗性与齿轮的耐咬粘性、高温环境下的使用性和抗颤振性。
<(D)多元醇酯化合物>
作为(D)多元醇酯化合物,可以举出例如多元醇与羧酸化合物的反应产物。此外,(D)多元醇酯化合物可以为多元醇中的全部羟基被酯化的完全酯,此外也可以是多元醇的羟基中的一部分未被酯化而残留的偏酯,此外还可以是完全酯与偏酯的混合物,但从抑制酸值、提高抗颤振性的观点出发,优选为完全酯。
作为多元醇,优选为碳原子数为2~15的脂肪族多元醇、更优选为碳原子数为2~8的脂肪族多元醇。
作为多元醇的具体例,可以举出乙二醇、丙二醇(propylene glycol)、丙二醇(propanediol)、丁二醇、2-甲基-1,3-丙二醇、戊二醇、新戊二醇、己二醇、2-乙基-2-甲基-1,3-丙二醇、庚二醇、2-甲基-2-丙基-1,3-丙二醇、2,2-二乙基-1,3-丙二醇、辛二醇、壬二醇、癸二醇、十一烷二醇、十二烷二醇、十三烷二醇、十四烷二醇、十五烷二醇等脂肪族二醇;三羟甲基乙烷、二(三羟甲基乙烷)、三(三羟甲基丙烷)、二(三羟甲基丙烷)、丙三醇、季戊四醇、二季戊四醇、三季戊四醇、山梨醇等3元以上的脂肪族多元醇等。这些之中,特别地,从得到优异的抗颤振性的观点出发,优选为3元以上的脂肪族多元醇,更优选为丙三醇。
作为羧酸化合物,可以优选地举出例如碳原子数为12~24、优选为12~20、更优选为16~20的羧酸。羧酸化合物可以在分子中具有直链状、支链中任一者,此外,可以是饱和、不饱和中任一者。
作为这样的羧酸化合物,可以例如代表性地举出月桂酸、十三烷酸、肉豆蔻酸、棕榈酸、十七烷酸、硬脂酸、异硬脂酸、花生酸、山嵛酸、木蜡酸等1元的饱和羧酸;肉豆蔻油酸、棕榈油酸、顺-6-十六碳烯酸(sapienic acid)、油酸、亚油酸、亚麻酸、鳕油酸、二十碳烯酸、二十碳二烯酸、芥酸、二十二碳二烯酸等1元的不饱和羧酸等。
这些羧酸之中,优选为硬脂酸、异硬脂酸、油酸、亚油酸、亚麻酸,更优选为硬脂酸和油酸。
(D)多元醇酯化合物的组合物总量基准的含量优选为0.001~3质量%、更优选为0.01~2质量%、进一步优选为0.03~1质量%、特别优选为0.05~0.5质量%。通过将(D)多元醇酯化合物的含量设为上述范围,容易同时得到省燃耗性与齿轮的耐咬粘性、高温环境下的使用性和抗颤振性。
此外,特别地从抗颤振性的观点出发,(C)酰胺化合物与(D)多元醇酯化合物的总计含量以组合物总量为基准计优选为0.01~3质量%、更优选为0.03~2质量%、进一步优选为0.05~1质量%、特别优选为0.05~0.5质量%。
<其他添加剂>
本实施方式的润滑油组合物在不阻碍发明目的的范围内,可以适当选择配合除了(A)矿物油、(B)合成油、(C)酰胺化合物、和(D)多元醇酯化合物之外的其他添加剂,例如粘度指数改进剂、摩擦调节剂、抗氧化剂、分散剂、降凝剂、消泡剂等其他添加剂。这些的添加剂可以单独使用或组合使用多种上述各种合成油。本实施方式的润滑油组合物可以由上述(A)矿物油、(B)合成油、(C)酰胺化合物、和(D)多元醇酯化合物构成,此外,也可以由(A)矿物油、(B)合成油、(C)酰胺化合物、(D)多元醇酯化合物、和其他添加剂构成。
这些的其他添加剂的总计含量只要是不违反发明的目的的范围,则没有特别限制,考虑到添加其他添加剂的效果,以组合物总量为基准计优选为0.1~20质量%、更优选为1~15质量%、进一步优选为5~13质量%。
(粘度指数改进剂)
本实施方式的润滑油组合物为了提高上述基础油(A)的粘度指数,可以含有粘度指数改进剂。作为粘度指数改进剂,可以举出例如非分散型聚甲基丙烯酸酯、分散型聚甲基丙烯酸酯、烯烃系共聚物(例如乙烯-丙烯共聚物等)、分散型烯烃系共聚物、苯乙烯系共聚物(例如苯乙烯-二烯共聚物、苯乙烯-异戊二烯共聚物等)等聚合物。
作为这些的粘度指数改进剂的质均分子量(Mw),根据其种类适当设定,从粘度特性的观点出发,通常为500~1,000,000、优选为5,000~800,000、更优选为10,000~600,000。
非分散型和分散型聚甲基丙烯酸酯的情况中,优选为5,000~500,000、更优选为10,000~300,000、进一步优选为20,000~100,000。此外,烯烃系共聚物的情况中,优选为800~300,000、更优选为10,000~200,000。
在此,质均分子量可以通过凝胶渗透色谱(GPC)法测定,由使用聚苯乙烯制作的标准曲线而求出。例如,上述各聚合物的质均分子量可以通过以下的GPC法作为聚苯乙烯换算值而算出。
<GPC测定装置>
・柱:TOSO GMHHR-H(S)HT
・检测器:液相色谱用RI检测器 WATERS 150C
<测定条件等>
・溶剂:1,2,4-三氯苯
・测定温度:145℃
・流速:1.0毫升/分钟
・试样浓度:2.2mg/毫升
・注入量:160微升
・标准曲线:Universal Calibration
・分析软件:HT-GPC(Ver,1.0)。
粘度指数改进剂的含量从粘度特性的观点出发,以组合物总量为基准计优选为0.5~15质量%、更优选为1~10质量%、进一步优选为1.5~8质量%。
(摩擦调节剂)
作为摩擦调节剂,可以举出例如在分子中具有至少1个碳原子数为6~30的烷基或烯基、特别是碳原子数为6~30的直链烷基或直链烯基的脂肪酸胺、脂肪酸酯、脂肪酸酰胺、脂肪酸、脂肪族醇、和脂肪酸醚等无灰摩擦调节剂;二硫代氨基甲酸钼(MoDTC)、二硫代磷酸钼(MoDTP)、和钼酸的胺盐等钼系摩擦调节剂等。
使用无灰摩擦调节剂时,其组合物总量基准的含量优选为0.01~3质量%、更优选为0.1~2质量%。此外,使用钼系摩擦调节剂时,其组合物总量基准的含量以钼原子换算计优选为60~1,000质量ppm、更优选为80~1,000质量ppm。如果含量为上述范围内,则可以得到优异的省燃耗性、耐摩耗特性,能够抑制清净性的降低。
(抗氧化剂)
作为抗氧化剂,可以举出例如二苯基胺系抗氧化剂、萘基胺系抗氧化剂等胺系抗氧化剂;单酚系抗氧化剂、二酚系抗氧化剂、受阻酚系抗氧化剂等酚系抗氧化剂;使三氧化钼和/或钼酸与胺化合物反应而得到的钼胺络合物等钼系抗氧化剂;吩噻嗪、二(十八烷基)硫化物、3,3'-硫代二丙酸二月桂基酯、2-巯基苯并咪唑等硫系抗氧化剂;亚磷酸三苯酯、亚磷酸二异丙基单苯基酯、亚磷酸单丁基二苯基酯等磷系抗氧化剂等。
(分散剂)
作为分散剂,可以举出例如不含硼的丁二酰亚胺类、含硼的丁二酰亚胺类、苯甲基胺类、含硼的苯甲基胺类、丁二酸酯类、脂肪酸或者丁二酸所代表的一元或二元羧酸酰胺类等无灰系分散剂。
(降凝剂)
作为降凝剂,可以举出例如乙烯-乙酸乙烯酯共聚物、氯化石蜡与萘的缩合物、氯化石蜡与苯酚的缩合物、聚甲基丙烯酸酯、聚烷基苯乙烯等。
(消泡剂)
作为消泡剂,可以举出例如硅酮油、氟硅酮油、和氟烷基醚等。
(润滑油组合物的各种物性)
本实施方式的润滑油组合物的100℃运动粘度优选为2~5mm2/s、更优选为2.25~4.75mm2/s、进一步优选为2.5~4.5mm2/s。40℃运动粘度优选为5~17mm2/s、更优选为6~17mm2/s、进一步优选为8~17mm2/s。
此外,粘度指数从在广泛的温度区域内发挥出稳定的效果的观点出发,优选为130以上、更优选为135以上、进一步优选为140以上。
本实施方式的润滑油组合物的闪点优选为184℃以上、更优选为186℃以上、进一步优选为190℃以上。
像这样,本实施方式的润滑油组合物是低粘度、且闪点高,因此在具有省燃耗性的同时,能够在高温环境下使用。此外,通过在除了具有特定的性状的(A)矿物油、(B)合成油之外还包含(C)酰胺化合物、和(D)多元醇酯化合物,同时具备省燃耗性与齿轮的耐咬粘性、高温环境下的使用性和抗颤振性。
本实施方式的润滑油组合物活用这样的特性,可以用作例如汽油车、混合动力车、电动汽车等的变速器用润滑油组合物。特别地,高温环境下的使用性优异,因此能够适合用作混合动力车、电动汽车用的润滑油组合物。此外,作为针对本实施方式的润滑油组合物能够应用的其他用途,还可以优选地举出例如内燃机油、液压致动油、涡轮机油、压缩机油、机床用润滑油、切削油、齿轮油、流体轴承油组合物、滚动轴承油等。
〔润滑方法和变速器〕
本实施方式的润滑方法是使用上述本实施方式的润滑油组合物的润滑方法。本实施方式的润滑方法中使用的润滑油组合物同时具备省燃耗性与齿轮的耐咬粘性、高温环境下的使用性和抗颤振性。因此,本实施方式的润滑方法例如适合用于汽油车、混合动力车、电动汽车等的变速器。特别地,由于高温环境下的使用性优异,因此适合用作混合动力车、电动汽车的变速器中的润滑方法。此外,还适合用于其他用途、例如具备内燃机、液压机械、涡轮机、压缩机、机床、切削机械、齿轮(齿轮gears)、流体轴承、滚动轴承的机械等。
此外,本实施方式的变速器使用本实施方式的润滑油组合物。本实施方式的变速器由于使用同时具备省燃耗性与齿轮的耐咬粘性、高温环境下的使用性和抗颤振性的润滑油组合物,因此广泛适合应用于汽油车、混合动力车、电动汽车等各种各样的车辆。特别地,由于高温环境下的使用性优异,因此适合用作混合动力车、电动汽车的变速器。此外,还适合用于其他用途、例如具备内燃机、液压机械、涡轮机、压缩机、机床、切削机械、齿轮(齿轮gears)、流体轴承、滚动轴承的机械等。
实施例
结合,通过实施例对本发明进行进一步详细说明,但本发明不因这些例子而受到任何限定。
实施例1~5、比较例1~4
以表1所示的配合量(质量%)制备润滑油组合物。针对所得润滑油组合物,通过以下的方法进行各种试验,评价其物性。评价结果示于表1。应予说明,本实施例中使用的表1所示的各成分的详情如下所述。
・矿物油-1:石蜡系矿物油,40℃运动粘度9.5mm2/s,100℃运动粘度2.7mm2/s,粘度指数117,闪点186℃,
・矿物油-2:石蜡系矿物油,40℃运动粘度9.3mm2/s,100℃运动粘度2.6mm2/s,粘度指数112,闪点186℃
・矿物油-3:石蜡系矿物油,40℃运动粘度9.9mm2/s,100℃运动粘度2.7mm2/s,粘度指数116,闪点170℃
・合成油:酯油,40℃运动粘度7.5mm2/s,100℃运动粘度2.5mm2/s,粘度指数197,闪点206℃
・酰胺化合物:异硬脂酸与脂肪族多胺(四亚乙基五胺)的反应产物
・多元醇酯化合物:油酸甘油单酯与油酸甘油二酯的混合物
・粘度指数改进剂1:烯烃系共聚物
・粘度指数改进剂2:聚甲基丙烯酸酯(数均分子量:50000)
・其他添加剂:摩擦调节剂、抗氧化剂、分散剂、降凝剂、消泡剂。
润滑油组合物的性状的测定、和评价通过以下的方法进行。
(1)运动粘度
按照JIS K 2283:2000,测定40℃、100℃下的运动粘度。
(2)粘度指数(VI)
按照JIS K 2283:2000测定。
(3)闪点
按照JIS K2265-4:2007,通过COC法测定。
(3)齿轮的耐咬粘性的评价
按照ASTM D5182-9,使用FZG齿轮试验机,在90℃、1500rpm、15分钟的条件下进行试验,依照规定阶段性地提高载重,用齿轮面上发生咬粘(胶合)的载重的阶段来表示。载重的阶段越高,则表示耐咬粘性越优异。
(4)抗颤振性的评价
按照JASO M349:2012,在以下的条件下进行试验,取0.9m/s的滑动速度下的dμ/dV×1000的数值,记作抗颤振性的指标。该数值越大,则表示抗颤振性越优异,该数值为负的数值时,表示颤振发生。
・摩擦材料:纤维素制盘/钢板
・油量:150ml
・性能测定:磨合运转后在油温40℃、和120℃的条件下,评价达到0.9m/s的滑动速度时的μ-V摩擦特性(面压:1MPa、250至0rpm的转速的下降扫描(sweep down)时的dV/dV0)。
・磨合运转的条件如下所述。
油温为80℃,面压为1MPa,滑动速度为0.6m/s,时间为30分钟。
[表1]
根据表1的结果确认到,实施例1~5的润滑油组合物的40℃运动粘度、100℃运动粘度低,因此省燃耗性优异,闪点高达194℃以上,因此高温环境下的使用性也优异,且齿轮的耐咬粘性和抗颤振性也优异。另一方面确认到,包含闪点低达170℃的矿物油-3的比较例1的润滑油组合物的闪点低,高温环境下的使用性方面不具有充分的性能,不含(B)合成油的比较例2的润滑油组合物的闪点低,高温环境下的使用性方面、此外齿轮的耐咬粘性方面也不具有充分的性能,不含(C)多酰胺的比较例3的润滑油组合物、和不含(D)多元醇酯化合物的比较例4的润滑油组合物在抗颤振性方面不具有充分的性能,因此不能称为同时满足省燃耗性、高温环境下的使用性、齿轮的耐咬粘性和抗颤振性。
工业实用性
本实施方式的润滑油组合物同时具备省燃耗性、高温环境下的使用性、齿轮的耐咬粘性、和抗颤振性。因此,本实施方式的润滑油组合物、使用该润滑油组合物的润滑方法、和变速器适合用于汽油车、混合动力车、电动汽车等的变速器。特别地,由于高温环境下的使用性优异,因此适合用于混合动力车、电动汽车的变速器。
Claims (38)
1.润滑油组合物,其包含(A)40℃运动粘度为5~15mm2/s、且闪点为180℃以上的矿物油、(B)40℃运动粘度为5~15mm2/s、且闪点为190℃以上的合成油、(C)酰胺化合物、和(D)多元醇酯化合物,
所述(C)酰胺化合物为碳原子数为6~12的脂肪族多胺与碳原子数为16~20的饱和羧酸化合物的反应产物,所述脂肪族多胺的氮原子数为2~16,
所述(D)多元醇酯化合物为碳原子数为2~8的脂肪族多元醇与碳原子数为16~20的羧酸化合物的反应产物,
所述(A)矿物油的含量以组合物总量为基准计为60~90质量%,
所述(B)合成油的含量以组合物总量为基准计为5~25质量%,
所述(C)酰胺化合物与所述(D)多元醇酯化合物的总计含量以组合物总量为基准计为0.05~0.5质量%。
2.根据权利要求1所述的润滑油组合物,其中,所述脂肪族多胺为碳原子数为6~12的聚亚烷基多胺。
3.根据权利要求1或2所述的润滑油组合物,其中,所述脂肪族多胺的氮原子数为2~12。
4.根据权利要求1或2所述的润滑油组合物,其中,所述脂肪族多胺的氮原子数为3~8。
5.根据权利要求1或2所述的润滑油组合物,其中,所述脂肪族多胺为直链状。
6.根据权利要求1或2所述的润滑油组合物,其中,所述(A)矿物油的40℃运动粘度为8.5~11mm2/s。
7.根据权利要求1或2所述的润滑油组合物,其中,所述(A)矿物油的闪点为186℃以上。
8.根据权利要求1或2所述的润滑油组合物,其中,所述(A)矿物油的100℃运动粘度为2~5mm2/s。
9.根据权利要求1或2所述的润滑油组合物,其中,所述(A)矿物油的100℃运动粘度为2~3mm2/s。
10.根据权利要求1或2所述的润滑油组合物,其中,所述(A)矿物油的粘度指数为90以上。
11.根据权利要求1或2所述的润滑油组合物,其中,所述(A)矿物油的粘度指数为110以上。
12.根据权利要求1或2所述的润滑油组合物,其中,所述(B)合成油的40℃运动粘度为6~10mm2/s。
13.根据权利要求1或2所述的润滑油组合物,其中,所述(B)合成油的闪点为200℃以上。
14.根据权利要求1或2所述的润滑油组合物,其中,所述(B)合成油的100℃运动粘度为1~5mm2/s。
15.根据权利要求1或2所述的润滑油组合物,其中,所述(B)合成油的100℃运动粘度为2~4mm2/s。
16.根据权利要求1或2所述的润滑油组合物,其中,所述(B)合成油的粘度指数为120以上。
17.根据权利要求1或2所述的润滑油组合物,其中,所述(B)合成油的粘度指数为160以上。
18.根据权利要求1或2所述的润滑油组合物,其中,所述(B)合成油的含量以组合物总量为基准计为8~25质量%。
19.根据权利要求1或2所述的润滑油组合物,其中,所述(B)合成油的含量以组合物总量为基准计为10~25质量%。
20.根据权利要求1或2所述的润滑油组合物,其中,所述(C)酰胺化合物的含量以组合物总量为基准计为0.001~0.5质量%。
21.根据权利要求1或2所述的润滑油组合物,其中,所述(C)酰胺化合物的含量以组合物总量为基准计为0.01~0.1质量%。
22.根据权利要求1或2所述的润滑油组合物,其中,所述(D)多元醇酯化合物的含量以组合物总量为基准计为0.001~3质量%。
23.根据权利要求1或2所述的润滑油组合物,其中,所述(D)多元醇酯化合物的含量以组合物总量为基准计为0.05~0.5质量%。
24.根据权利要求1或2所述的润滑油组合物,其100℃运动粘度为2~5mm2/s。
25.根据权利要求1或2所述的润滑油组合物,其闪点为184℃以上。
26.根据权利要求1或2所述的润滑油组合物,其40℃运动粘度为5~17mm2/s。
27.根据权利要求1或2所述的润滑油组合物,其100℃运动粘度为2~5mm2/s、且闪点为184℃以上。
28.根据权利要求1或2所述的润滑油组合物,其40℃运动粘度为5~17mm2/s、且闪点为184℃以上。
29.根据权利要求1或2所述的润滑油组合物,其100℃运动粘度为2.5~4.5mm2/s。
30.根据权利要求1或2所述的润滑油组合物,其闪点为190℃以上。
31.根据权利要求1或2所述的润滑油组合物,其40℃运动粘度为8~17mm2/s。
32.根据权利要求1或2所述的润滑油组合物,其中,还包含选自粘度指数改进剂、摩擦调节剂、抗氧化剂、分散剂、降凝剂和消泡剂中的至少一种。
33.根据权利要求32所述的润滑油组合物,其中,所述粘度指数改进剂选自非分散型聚甲基丙烯酸酯、分散型聚甲基丙烯酸酯和烯烃系共聚物中的至少一种。
34.根据权利要求1或2所述的润滑油组合物,其用于变速器。
35.根据权利要求1或2所述的润滑油组合物,其用于电动汽车或混合动力车。
36.润滑方法,其中,使用权利要求1~34中任一项所述的润滑油组合物。
37.根据权利要求36所述的润滑方法,其中,对变速器进行润滑。
38.变速器,其使用权利要求1~34中任一项所述的润滑油组合物。
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