申请人:NIPPON OIL CO. LTD.
公开号:EP0781834A2
公开(公告)日:1997-07-02
A lubricating oil composition comprises (A) a base oil, (B) a 3-methyl-5-tert-butyl-4-hydroxyphenyl substituted fatty acid ester in an amount of 0.1 - 5 percent by mass and (C) an auxiliary component, said auxiliary component being one member of the group of (a) a nitrogen-containing compound in an amount of 0.001 - 1 percent by mass, (b) a sulfur and/or phosphorus-containing compound in an amount of 0.1 - 5.0 percent by mass or (c) a phenolic compound in an amount of 0.1 - 5.0 percent by mass. This composition features the combination with a base oil of these specified components whereby there is provided synergistic effect conducive to inhibition or prevention of both oxidation and sludge formation while in use under elevated temperature conditions over extended periods of time.
一种润滑油组合物包括:(A)基础油;(B)3-甲基-5-叔丁基-4-羟基苯基取代脂肪酸酯,其质量百分比为 0.1 - 5%;(C)辅助组分,所述辅助组分为以下组中的一种:(a)含氮化合物,其质量百分比为 0.001 - 1%;(b)含硫和/或磷化合物,其质量百分比为 0.1 - 5.0%;或(c)酚类化合物,其质量百分比为 0.001 - 1%(质量百分比),(b) 含硫和/或磷化合物,含量为 0.1 - 5.0%(质量百分比),或 (c) 酚类化合物,含量为 0.1 - 5.0%(质量百分比)。这种组合物的特点是将这些特定成分与基础油结合在一起,从而产生协同效应,有利于在高温条件下长时间使用时抑制或防止氧化和油泥的形成。