CN103068955B - 内燃机用润滑油组合物 - Google Patents
内燃机用润滑油组合物 Download PDFInfo
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- CN103068955B CN103068955B CN201180041033.5A CN201180041033A CN103068955B CN 103068955 B CN103068955 B CN 103068955B CN 201180041033 A CN201180041033 A CN 201180041033A CN 103068955 B CN103068955 B CN 103068955B
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Abstract
本发明的内燃机用润滑油组合物,含有作为(A)成分的有机钼化合物、作为(B)成分的100℃的动力粘度为25mm2/秒以上的基油以及作为(C)成分的100℃的动力粘度小于12.5mm2/秒的基油,100℃的动力粘度为5mm2/秒~12.5mm2/秒,并且磷含量为800ppm以下。
Description
技术领域
本发明涉及内燃机用润滑油组合物,更详细地说,涉及具有优异的节省燃料费用性能、且具有防止产生高温堆积物的性能的内燃机用润滑油组合物。
背景技术
汽车等内燃机用润滑油具有对发动机内部润滑、冷却或对燃烧产物进行清洁分散等作用。近年来,为了防止地球暖化,要求减少汽车等的耗油量、抑制二氧化碳的排出量的要求日益高涨,因此,在内燃机用润滑油中,对具有减少耗油量功能的节省燃料费用型的内燃机用润滑油进行了研究并对其进行了使用。
节省燃料费用型的内燃机用润滑油通过降低发动机内部产生的摩擦,从而节省内燃机的燃料费用,具体地说,作为降低摩擦的添加剂(摩擦改进剂),通常混合二硫代氨基甲酸钼等有机钼系的摩擦改进剂。然而,混合有机钼系的摩擦改进剂的内燃机用润滑剂在高温下的氧化稳定性恶化,容易产生高温堆积物。尤其是近年来的稀燃发动机和直喷发动机等发动机比现有的发动机效率高,并存在燃烧温度上升的倾向,因此由于产生高温堆积物而导致的问题变大。
因而,提出了通过各种方法减少高温堆积物的方法。例如,在专利文献1中,公开了一种具有涡轮增压器的多级发动机油组合物,其特征在于,以动力粘度为1.5~13cSt(100℃)的矿物油和/或合成油作为基油,含有3~40质量%的(A)动力粘度为16~45cSt(100℃)的矿物油和/或合成油以及0.5~15质量%的(B)粘度指数改进剂作为必须成分。此外,在专利文献2中,公开了一种内燃机用润滑油组合物,其特征在于,以润滑油基油总质量为基准计算,含有1质量%以上在100℃下的动力粘度为2cSt~13cSt、且通过气相色谱蒸馏测定的沸点为480℃以上的重质成分的润滑油成分作为基油。此外,在专利文献2的[0021]~[0026]段落中,还公开了作为摩擦改进剂,可以使用有机钼系化合物。
现有技术文献
专利文献
专利文献1:日本专利公开公报特开昭59-122595号
专利文献2:日本专利公开公报特开平9-328694号公报
发明内容
本发明要解决的技术问题
然而,在专利文献1和2记载的组合物中,如果混合有机钼系的摩擦改进剂,则也无法充分减少高温堆积物,因此期望能进一步减少高温堆积物的节省燃料费用型的内燃机用润滑油组合物。
因此,本发明要解决的问题是提供一种内燃机用润滑油组合物,其在能维持优异的节省燃料费用性能的同时,还具有防止产生高温堆积物的性能。
解决技术问题的技术方案
因此,本发明人进行了专心的研究,发现通过在内燃机用润滑油组合物中混合有机钼化合物和具有特定粘度的多种基油,能赋予优异的节省燃料费用性能和防止产生高温堆积物的性能,从而完成了本发明。
即,本发明是一种内燃机用润滑油组合物,其特征在于,所述内燃机用润滑油组合物含有作为(A)成分的有机钼化合物、作为(B)成分的100℃的动力粘度为25mm2/秒以上的基油以及作为(C)成分的100℃的动力粘度小于12.5mm2/秒的基油,100℃的动力粘度为5mm2/秒~12.5mm2/秒,并且磷含量为800ppm以下。
发明效果
本发明的效果在于提供了一种能维持优异的节省燃料费用性能、且具有防止产生高温堆积物的性能的内燃机用润滑油组合物。
附图说明
图1是TEOST33C试验机的概略图。
图2是表示在TEOST33C试验中,容器内的一个循环期间的温度变化。
具体实施方式
本发明的内燃机用润滑油组合物含有有机钼化合物作为(A)成分,作为有机钼化合物,只要是公知的有机钼化合物,就可以任意使用,作为有机钼化合物,可以例举硫代氨基甲酸钼、二硫代磷酸钼、日本专利公开公报特公平5-62639号等中列举的钼胺化合物[选自三氧化钼、钼酸或其碱金属盐中的一种或两种以上的6价钼化合物与R1R2R3N(R1、R2、R3各自是氢原子或碳原子数为1~30的烃基,可以相同或不同,R1、R2、R3的碳原子总数为4以上)的胺化合物反应得到的油溶性钼化合物]、日本专利公开公报特公平4-30959号等中列举的包含磷和硫的钼化合物[(a)至少一种6价钼化合物、(b)选自硫化氢、氢硫化碱金属或用M2S(M为碱金属或铵基)表示的硫化碱金属中的至少一种化合物、(c)用下述化学式
(X1、X2、Y1、Y2可以是氧或硫原子,可以相同或不同,n为0或1,R1、R2为有机残基,可以相同或不同)表示的化合物或其盐、以及(d)能将6价的钼化合物还原成5价或4价的还原剂(其中,不包括b、c成分)反应得到的化合物]。
在所述的有机钼化合物中,由于用下述通式(1)表示的二硫代氨基甲酸钼降低摩擦的效果大,因此优选的是用下述通式(1)表示的二硫代氨基甲酸钼:
(式中,R1~R4表示碳原子数为4~18的直链烷基或烯基或者支链烷基或烯基,X1~X4表示氧原子或硫原子。)
所述通式(1)的R1~R4是碳原子数为4~18的直链烷基或烯基或者支链烷基或烯基,作为所述的基团,可以例举丁基、异丁基、叔丁基、戊基、异戊基、新戊基、叔戊基、己基、异己基、庚基、异庚基、辛基、2-乙基己基、异辛基、壬基、异壬基、癸基、异癸基、十一烷基、异十一烷基、十二烷基、异十二烷基、十三烷基、异十三烷基、十四烷基、异十四烷基、十六烷基、异十六烷基、十八烷基、2-丁基辛基、2-丁基癸基、2-己基辛基、2-己基癸基、2-辛基癸基、2-己基十二烷基、单甲基支链-异十八烷基等烷基;丁烯基、异丁烯基、戊烯基、异戊烯基、己烯基、庚烯基、辛烯基、壬烯基、癸烯基、十一烯基、十二烯基、十四烯基、油烯基等烯基等。其中,由于降低摩擦的效果高,因此优选的是烷基,更优选的是碳原子数为6~16的烷基,进一步优选的是碳原子数为8~13的烷基。另外,R1~R4可以相同,也可以不同。
X1~X4是氧原子或硫原子,X1~X4可以全部是氧原子或硫原子,X1~X4也可以是氧原子和硫原子的混合物。然而,由于降低摩擦的效果高、且腐蚀性低,因此优选的是氧原子/硫原子=1/3~3/1(摩尔比)的比例。
所述有机钼化合物可以是一种,也可以是两种以上的混合物,在本发明的内燃机用润滑油组合物中的添加量虽然没有规定,但是如果添加量较少,则有时无法获得降低摩擦的效果,如果添加量过多,则有时会产生超出本发明的内燃机用润滑油组合物所具有的防止产生高温堆积物的性能的高温堆积物,因此所述有机钼化合物相对于本发明的内燃机用润滑油组合物的总量,以钼量计,优选的是添加200~2000ppm,进一步优选的是200~1500ppm,更优选的是300~1000ppm。
本发明中使用的(B)成分是100℃的动力粘度为25mm2/秒以上的基油,作为该基油,可以使用矿物油系基油、合成系基油或它们的混合油。作为矿物油系基油,可以使用例如石蜡系矿物油、环烷系矿物油等,也可以使用所述矿物油系基油的溶剂精制油、氢化处理油或蜡异构化油等。作为合成系基油,可以使用例如聚α烯烃、聚异丁烯、二酯、聚油基酯、聚苯醚等。其中,优选的是光亮油等石蜡系矿物油、高粘度的聚α烯烃。
作为(B)成分,所述的基油可以单独使用,也可以混合使用,但是100℃的动力粘度必须为25mm2/秒以上,优选的是25~100mm2/秒,进一步优选的是25~80mm2/秒,更优选的是30~60mm2/秒。如果100℃的动力粘度小于25mm2/秒,则无法充分发挥防止产生高温堆积物的性能。此外,如果粘度过高,则存在有时处理困难,需要花费更多的用于均匀混合的时间等问题,因此动力粘度优选的是100mm2/秒以下。
(B)成分的混合量虽然没有特别规定,但是混合量如果过少,则有时无法充分发挥防止产生高温堆积物的性能,此外,混合量如果过多,则会导致下述问题:有时难以使本发明内燃机组合物用润滑油组合物的100℃的动力粘度成为12.5mm2/秒以下;有时低温粘度上升,导致节省燃料费用的效果降低。因此,(B)成分的混合量相对于本发明内燃机用润滑油组合物的总量,优选的是1~30质量%,进一步优选的是3~25质量%,更优选的是5~20质量%。
本发明中使用的(C)成分是100℃的动力粘度小于12.5mm2/秒的基油,作为该基油,可以使用矿物油系基油、合成系基油或它们的混合油,作为所述基油,可以列举石蜡系矿物油、环烷系矿物油、这些矿物油的溶剂精制处理油、氢化处理油或蜡异构处理油、或组合多种这些处理得到的矿物油等矿物油系基油;聚α烯烃、聚异丁烯等合成油。
(C)成分的动力粘度如果为12.5mm2/秒以上,则无法制造本发明中规定动力粘度范围内的润滑油组合物。此外,即使(C)成分的动力粘度小于12.5mm2/秒,但如果是过高粘度的基油,则会导致下述问题:由于能添加的高粘度基油的添加量减少,所以有时无法有效地降低高温堆积物的产生,有时本发明的内燃机用润滑油组合物的低温粘度上升导致节省燃料费用的效果降低。因此,(C)成分的100℃的动力粘度优选的是1~11mm2/秒,进一步优选的是2~8mm2/秒,更优选的是2~5mm2/秒。
此外,从提高节省燃料费用性能的观点出发,(C)成分的粘度指数优选的是100以上,进一步优选的是110以上,更优选的是120以上。低粘度基油的粘度指数如果小于100,则作为最终产品的内燃机用润滑油组合物的低温粘度上升,导致有时无法获得节省燃料费用的效果。
(C)成分的混合量只要能使混合了其它添加剂的本发明的内燃机用润滑油组合物100℃的动力粘度成为5mm2/秒~12.5mm2/秒就可以,具体地说,(C)成分的混合量相对于本发明的润滑油组合物总量,混合50~95质量%即可,优选的是混合60~85质量%。
此外,含有所述(A)~(C)成分的本发明的内燃机用润滑油组合物的磷量必须为800ppm以下。磷有时也会微量存在于基油中,但本发明的内燃机用润滑油组合物中的磷几乎都是来自向内燃机用润滑油组合物中添加的磷系添加剂的磷。作为所述磷系添加剂,可以例举二硫代磷酸钼、二硫代磷酸锌等含金属的添加剂;磷酸单辛酯、磷酸二辛酯、磷酸单油基酯、磷酸二油基酯、磷酸三丁酯、磷酸三苯酯、磷酸三甲苯酯、亚磷酸三苯酯、亚磷酸三丁酯、亚磷酸三甲苯酯、硫代磷酸酯等极压剂;磷酸钙、磷酸镁、磷酸钡等清洁剂。
所述磷系添加剂可以添加一种或两种以上,所述磷系添加剂的添加量以磷量计,必须为800ppm以下。只要在800ppm以下,则高温堆积物的产生量基本不受磷浓度的影响,如果磷浓度超过800ppm,则高温堆积物的产生量会急剧增大。然而,磷浓度如果过低,则有时作为内燃机用润滑油的耐磨损性和防氧化性会恶化,因此,优选的是磷为规定量以上,作为具体的磷量,优选的是300~800ppm,更优选的是500~800ppm。另外,用于添加的最佳磷化合物是耐磨损性和防氧化性优异的二硫代磷酸锌。
本发明的内燃机用润滑油组合物在100℃下的动力粘度为5mm2/秒~12.5mm2/秒。如果小于5mm2/秒,则无法充分形成油膜,存在滑动面会产生磨损的问题,如果大于12.5mm2/秒,则会产生油膜过厚、磨损损失增大从而造成节省燃料费用的性能降低的问题。
本发明中的高温堆积物是指在300℃或400℃以上的高温下产生的、来自内燃机用润滑油组合物的不溶解物。该高温堆积物如果附着、堆积在发动机内部及增压器的轴承等上,则会导致发动机及增压器的性能降低、发生故障。
本发明的内燃机用润滑油组合物最大的特征是高温堆积物的产生量少。为了确认高温堆积物,只要是用公知的试验进行评价,就可以使用任意的试验,由于能进行更严格的评价,因此优选的是通过由ILSAC(国际润滑油标准委员会(InternationalLubricantStandardizationandApprovalCommittee))采用的TEOST33C试验(ASTMD6335)进行评价。高温堆积物的量越少越好,具体地说,由于在实际使用中基本上不会造成发动机性能及增压器的性能降低,所以在TEOST33C试验中,高温堆积物的量优选的是40mg以下,更优选的是30mg以下。
本发明的内燃机用润滑油组合物在不损害本发明效果的范围内,优选的是添加有粘度指数改进剂、倾点降低剂、极压剂、油性改进剂、防氧化剂、金属系清洁剂、无灰分散剂、金属钝化剂、防锈剂和消泡剂等添加剂中的任意一种以上。另外,在混合了所述添加剂的情况下,需要特别注意的是,相对于内燃机用润滑油组合物总量的磷量为800ppm以下,优选的是300~800ppm。
作为粘度指数改进剂,可以例举聚甲基丙烯酸(C1~C18)烷基酯、丙烯酸(C1~C18)烷基酯/甲基丙烯酸(C1~C18)烷基酯共聚物、二乙基氨基乙基甲基丙烯酸酯/甲基丙烯酸(C1~C18)烷基酯共聚物、乙烯/甲基丙烯酸(C1~C18)烷基酯共聚物、聚异丁烯、聚烷基苯乙烯、乙烯/丙烯共聚物、苯乙烯/马来酸酯共聚物、苯乙烯/异丁烯氢化共聚物等。此外,也可以使用赋予了分散性能的分散型或多功能型粘度指数改进剂。重均分子量为10000~1500000,优选的是30000~1000000左右。所述的粘度指数改进剂的混合量,优选的是相对于内燃机用润滑油组合物为0.1~20质量%,更优选的是相对于内燃机用润滑油组合物为0.3~15质量%。
作为倾点降低剂,可以例举聚甲基丙烯酸烷基酯、聚丙烯酸烷基酯、聚烷基苯乙烯、聚乙酸乙烯酯等,重均分子量为1000~100000,优选的是3000~80000左右。所述的倾点降低剂的混合量,优选的是相对于内燃机用润滑油组合物为0.005~3质量%,更优选的是相对于内燃机用润滑油组合物为0.01~2质量%。
作为极压剂,可以例举硫化油脂、烯烃聚硫化物、二苄基硫醚等硫系添加剂;磷酸单辛酯、磷酸三丁酯、亚磷酸三苯酯、亚磷酸三丁酯、硫代磷酸酯等磷系化合物;硫代磷酸金属盐、硫代氨基甲酸金属盐、酸性磷酸酯金属盐等有机金属化合物等。所述的极压剂的混合量,优选的是相对于内燃机用润滑油组合物为0.01~2质量%,更优选的是相对于内燃机用润滑油组合物为0.05~1质量%。
作为油性改进剂,可以例举油醇、硬脂醇等高级醇类;油酸、硬脂酸等脂肪酸类;油基甘油酯、硬脂基甘油酯、月桂基甘油酯等酯类;月桂酰胺、油酰胺、硬脂酰胺等酰胺类;月桂胺、油胺、硬脂胺等胺类;月桂基甘油醚、油基甘油醚等醚类。所述的油性改进剂的混合量,优选的是相对于内燃机用润滑油组合物为0.1~5质量%,更优选的是相对于内燃机用润滑油组合物为0.2~3质量%。
作为防氧化剂,可以例举2,6-二叔丁基苯酚、2,6-二叔丁基对甲酚、2,6-二叔丁基-4-甲基苯酚、2,6-二叔丁基-4-乙基苯酚、2,4-二甲基-6-叔丁基苯酚、4,4’-亚甲基二(2,6-二叔丁基苯酚)、4,4’-二(2,6-二叔丁基苯酚)、4,4’-二(2-甲基-6-叔丁基苯酚)、2,2’-亚甲基二(4-甲基-6-叔丁基苯酚)、2,2’-亚甲基二(4-乙基-6-叔丁基苯酚)、4,4’-亚丁基二(3-甲基-6-叔丁基苯酚)、4,4’-异亚丙基二(2,6-二叔丁基苯酚)、2,2’-亚甲基二(4-甲基-6-环己基苯酚)、2,2’-亚甲基二(4-甲基-6-壬基苯酚)、2,2’-异亚丁基二(4,6-二甲基苯酚)、2,6-二(2’-羟基-3’-叔丁基-5’-甲基苄基)-4-甲基苯酚、3-叔丁基-4-羟基茴香醚、2-叔丁基-4-羟基茴香醚、3-(4-羟基-3,5-二叔丁基苯基)丙酸辛酯、3-(4-羟基-3,5-二叔丁基苯基)丙酸硬脂基酯、3-(4-羟基-3,5-二叔丁基苯基)丙酸油基酯、3-(4-羟基-3,5-二叔丁基苯基)丙酸十二烷基酯、3-(4-羟基-3,5-二叔丁基苯基)丙酸癸酯、3-(4-羟基-3,5-二叔丁基苯基)丙酸辛酯、四{3-(4-羟基-3,5-二叔丁基苯基)丙酰氧基甲基}甲烷、3-(4-羟基-3,5-二叔丁基苯基)丙酸甘油单酯、3-(4-羟基-3,5-二叔丁基苯基)丙酸与甘油基单油基醚的酯、3-(4-羟基-3,5-二叔丁基苯基)丙酸丁二醇二酯、3-(4-羟基-3,5-二叔丁基苯基)丙酸硫代二甘醇二酯、4,4’-硫代二(3-甲基-6-叔丁基苯酚)、4,4’-硫代二(2-甲基-6-叔丁基苯酚)、2,2’-硫代二(4-甲基-6-叔丁基苯酚)、2,6-二叔丁基-α-二甲基氨基对甲酚、2,6-二叔丁基-4-(N,N’-二甲基氨基甲基苯酚)、二(3,5-二叔丁基-4-羟基苄基)硫醚、三{(3,5-二叔丁基-4-羟基苯基)丙酰氧基乙基}异氰脲酸酯、三(3,5-二叔丁基-4-羟基苯基)异氰脲酸酯、1,3,5-三(3,5-二叔丁基-4-羟基苄基)异氰脲酸酯、二{2-甲基-4-(3-正烷基硫代丙酰氧基)-5-叔丁基苯基}硫醚、1,3,5-三(4-叔丁基-3-羟基-2,6-二甲基苄基)异氰脲酸酯、四邻苯二甲酰基-二(2,6-二甲基-4-叔丁基-3-羟基苄基硫醚)、6-(4-羟基-3,5-二叔丁基苯胺基)-2,4-二(辛基硫基)-1,3,5-三嗪、2,2-硫代-{二乙基-二-3-(3,5-二叔丁基-4-羟基苯基)}丙酸酯、N,N’-六亚甲基二(3,5-二叔丁基-4-羟基-氢化氨基氰)、3,5-二叔丁基-4-羟基-苄基-磷酸二酯、二(3-甲基-4-羟基-5-叔丁基苄基)硫醚、3,9-二[1,1-二甲基-2-{β-(3-叔丁基-4-羟基-5-甲基苯基)丙酰氧基}乙基]-2,4,8,10-四氧杂螺[5,5]十一烷、1,1,3-三(2-甲基-4-羟基-5-叔丁基苯基)丁烷、1,3,5-三甲基-2,4,6-三(3,5-二叔丁基-4-羟基苄基)苯、二{3,3’-二-(4’-羟基-3’-叔丁基苯基)丁酸}二醇酯等酚系防氧化剂;1-萘胺、苯基-1-萘胺、对辛基苯基-1-萘胺、对壬基苯基-1-萘胺、对十二烷基苯基-1-萘胺、苯基-2-萘胺等萘胺系防氧化剂;N,N’-二异丙基对苯二胺、N,N’-二异丁基对苯二胺、N,N’-二苯基对苯二胺、N,N’-二-β-萘基对苯二胺、N-苯基-N’-异丙基对苯二胺、N-环己基-N’-苯基对苯二胺、N-1,3-二甲基丁基-N’-苯基对苯二胺、二辛基对苯二胺、苯基己基对苯二胺、苯基辛基对苯二胺等苯二胺系防氧化剂;二吡啶胺、二苯胺、p,p’-二正丁基二苯胺、p,p’-二叔丁基二苯胺、p,p’-二叔戊基二苯胺、p,p’-二辛基二苯胺、p,p’-二壬基二苯胺、p,p’-二癸基二苯胺、p,p’-二(十二烷基)二苯胺、p,p’-二苯乙烯二苯胺、p,p’-二甲氧基二苯胺、4,4’-二(4-α,α-二甲基苯甲酰基)二苯胺、对异丙氧基二苯胺、二吡啶胺等二苯胺系防氧化剂;吩噻嗪、N-甲基吩噻嗪、N-乙基吩噻嗪、3,7-二辛基吩噻嗪、吩噻嗪二羧酸酯、吩硒嗪等吩噻嗪系防氧化剂;二硫代磷酸锌等。所述的防氧化剂的混合量,优选的是相对于内燃机用润滑油组合物为0.01~5质量%,更优选的是相对于内燃机用润滑油组合物为0.05~4质量%。
作为金属系清洁剂,可以例举钙、镁、钡等的磺酸盐、苯酚盐、水杨酸盐、磷酸盐和它们的过碱性盐。其中,优选的是过碱性盐,在过碱性盐中,更优选的是TBN(总碱值)为30~500mgKOH/g的物质。此外,优选的是没有磷和硫原子的水杨酸系清洁剂。所述的清洁剂的混合量,优选的是相对于内燃机用润滑油组合物为0.5~10质量%,更优选的是相对于内燃机用润滑油组合物为1~8质量%。
作为无灰分散剂,可以例举加成了重均分子量约500~3000的烷基或烯基的琥珀酰亚胺、琥珀酸酯、苄胺或它们的硼改性物等。所述的无灰分散剂的混合量,优选的是相对于内燃机用润滑油组合物为0.5~10质量%,更优选的是相对于内燃机用润滑油组合物为1~8质量%。
作为金属钝化剂,可以例举苯并三唑、苯并咪唑、苯并噻唑、二硫化四烷基秋兰姆等。所述的金属钝化剂的混合量,优选的是相对于内燃机用润滑油组合物为0.01~3质量%,更优选的是相对于内燃机用润滑油组合物为0.02~2质量%。
作为防锈剂,可以例举亚硝酸钠、氧化石蜡钙盐、氧化石蜡镁盐、牛脂脂肪酸碱金属盐、碱土类金属盐或胺盐、烯基琥珀酸或烯基琥珀酸半酯(烯基的分子量为100~300左右)、脱水山梨糖醇单酯、壬基酚聚氧乙烯醚(ノニルフェノールエトキシレート)、羊毛脂脂肪酸钙盐等。所述的防锈剂的混合量,优选的是相对于内燃机用润滑油组合物为0.01~3质量%,更优选的是相对于内燃机用润滑油组合物为0.02~2质量%。
作为消泡剂,可以例举聚二甲基硅氧烷、三氟丙基甲基硅氧烷、胶体二氧化硅、聚丙烯酸烷基酯、聚甲基丙烯酸烷基酯、醇乙氧化物/丙氧化物、脂肪酸乙氧化物/丙氧化物、脱水山梨糖醇部分脂肪酸酯等。所述的消泡剂的混合量,优选的是相对于内燃机用润滑油组合物为0.001~0.1质量%,更优选的相对于内燃机用润滑油组合物为0.001~0.01质量%。
只要是汽油发动机、柴油发动机、气体发动机等内燃机,本发明的内燃机用润滑油组合物就可以作为任意的内燃机的润滑油使用,其中,优选的是作为汽油发动机的发动机油使用。
实施例
下面通过实施例对本发明进行具体说明。另外,在以下的实施例中,除非有特别的说明,“%”是以质量作为基准。
按照下述表1和表2所示的混合表,制备了试验中使用的内燃机用润滑油组合物(试验油),并通过下述的方法进行了TEOST33C试验和节省燃料费用性能的试验,结果在表1和表2中示出。另外,在表3中示出了混合中使用的基油及其性状。
<TEOST33C试验:高温堆积物试验>
基于ASTMD6335的试验方法,使用TEOST33C试验机(TannasCo.公司制造)进行了试验。图1为TEOST33C试验机的概略图。具体的试验方法是:边对图1所示的装置的容器1内的杆(金属棒)2进行加热或冷却,使得容器1内的杆2变成图2所示的温度,边使用泵3从储存试验油的反应室4使一定量的试验油流过容器1内的杆2。将所述工序作为一个循环,重复12次所述循环之后,取出杆,测量附着在杆上的堆积物(附着物)的质量,并用过滤器过滤全部试验油来测量试验油中的堆积物的质量,将所述质量的总值作为高温堆积物量。另外,在反应室4内的试验油中吹入了规定量的含水分的空气以及一氧化氮气体。另外,作为含水分的空气,使用了将空气在加入有30ml水的50ml的烧瓶中鼓泡得到的含水分的空气。
详细的试验条件如下所示:
(试验条件)
温度:200~480℃
测试循环:12次循环
测试时间:9.5分钟/1循环(全部测试时间为114分钟)
试验油量:106ml
催化剂:萘酸铁(以铁量计,在试验油中添加了100ppm)
泵速度:0.49ml/分钟
N2O气体流量:3.5ml/分钟
空气流量:3.5ml/分钟
<节省燃料费用的性能的试验>
对于各试验油,使用SRV试验机,按照以下的条件测定了摩擦系数。摩擦系数越低显示出节省燃料费用的性能就越好。
上部试验片:圆柱状试验片(φ15×22mm,材料SUJ-2)
下部试验片:圆盘状试验片(φ24×6.85mm,材料SUJ-2)
负荷:200N
振幅:1.0mm
周期:50Hz
测定温度:80℃
测定时间:15分钟
表1
*使用所述的被记载为余量的基油将整体调整为100。
表2
*使用所述的被记载为余量的基油将整体调整为100。
另外,在所述的本发明产品和比较品中使用的各成分的详细内容如
下所述:
粘度指数改进剂:聚甲基丙烯酸酯系粘度指数改进剂
清洁剂:水杨酸钙(TBN280)
分散剂:聚烯基琥珀酰亚胺
防氧化剂:苯丙酸-3,5-二(1,1-二甲基-乙基)-4-羟基辛基酯与二辛基二苯胺的1:1(质量比)混合物
二硫代磷酸锌:二直链烷基(碳原子数为4~6的混合物)二硫代磷酸锌(磷含量:8.67%)
二硫代氨基甲酸钼:通式(1)的R1~R4是碳原子数为8或13的混合、X1和X2为氧原子,X3和X4为硫原子(钼含量17.5%)
此外,使用的基油及其性状如下表3所示。
表3
PAO:聚α烯烃。
Claims (4)
1.一种内燃机用润滑油组合物,其特征在于,所述内燃机用润滑油组合物由作为(A)成分的有机钼化合物、作为(B)成分的100℃的动力粘度为25mm2/秒以上的矿物油系基油或聚α烯烃、作为(C)成分的100℃的动力粘度小于12.5mm2/秒的矿物油系基油或聚α烯烃以及任选的添加剂组成,
所述润滑油组合物的100℃的动力粘度为5mm2/秒~12.5mm2/秒,并且磷含量为300~800ppm,
相对于内燃机用润滑油组合物总量,(A)成分以钼量计含有200~2000ppm,(B)成分含有1~30质量%,(C)成分含有50~95质量%。
2.如权利要求1所述的内燃机用润滑油组合物,其特征在于,(A)成分为用下述通式(1)表示的化合物,
在通式(1)中,R1~R4表示碳原子数为4~18的直链或支链的烷基或者直链或支链的烯基,X1~X4表示氧原子或硫原子。
3.如权利要求1或2所述的内燃机用润滑油组合物,其特征在于,所述添加剂为选自于由如下添加剂所组成的组中的一种或两种以上:粘度指数改进剂、倾点降低剂、极压剂、油性改进剂、防氧化剂、金属系清洁剂、无灰分散剂、金属钝化剂、防锈剂以及消泡剂。
4.如权利要求3所述的内燃机用润滑油组合物,其特征在于,作为极压剂,二硫代磷酸锌相对于内燃机用润滑油组合物总量,以磷含量计算,含有300~800ppm。
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2010
- 2010-08-24 JP JP2010186834A patent/JP2012046555A/ja active Pending
-
2011
- 2011-08-19 US US13/818,329 patent/US20130310289A1/en not_active Abandoned
- 2011-08-19 CN CN201180041033.5A patent/CN103068955B/zh active Active
- 2011-08-19 WO PCT/JP2011/068747 patent/WO2012026399A1/ja active Application Filing
- 2011-08-19 KR KR1020137003028A patent/KR20130108532A/ko not_active Application Discontinuation
- 2011-08-19 EP EP11819862.1A patent/EP2610331B1/en active Active
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CN100567467C (zh) * | 2003-02-27 | 2009-12-09 | 新日本石油株式会社 | 四冲程机油基油及组合物 |
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JP2012046555A (ja) | 2012-03-08 |
US20130310289A1 (en) | 2013-11-21 |
CN103068955A (zh) | 2013-04-24 |
WO2012026399A1 (ja) | 2012-03-01 |
EP2610331B1 (en) | 2019-04-17 |
KR20130108532A (ko) | 2013-10-04 |
EP2610331A4 (en) | 2014-05-21 |
EP2610331A1 (en) | 2013-07-03 |
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