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    Use and method of lubricating a four-stoke engine
    75.
    发明授权
    Use and method of lubricating a four-stoke engine 有权
    润滑四冲程发动机的用途和方法

    公开(公告)号：EP2268778B1

    公开(公告)日：2018-03-21

    申请号：EP09733861.0

    申请日：2009-04-17

    申请人： CRODA INTERNATIONAL PLC

    发明人： KITCHING, Jane ,  RANDLES, Steven, James ,  BOYDE, Stephen ,  LEFEVRE, Josephine

    IPC分类号： C10M105/34 ,  C10M169/04 ,  C10N40/25 ,  C10N20/02

    CPC分类号： C10M105/34 ,  C10M169/04 ,  C10M2207/2815 ,  C10M2207/282 ,  C10N2220/022 ,  C10N2240/10

    摘要： An engine lubricant, especially an SAE OW engine lubricant is described. The engine lubricant has at least 15 wt % of at least one monoester and not more than 15 wt % of additives, wherein said at least one monoester, or mixture of said monoesters if more than one is present, has a kinematic viscosity at 100° C. of not more than 3.3, a viscosity index of at least 130 and a Noack evaporation loss of not more than 15 wt %. The monoester is preferably the reaction product of a monohydric alcohol and a monocarboxylic acid wherein said monohydric alcohol is at least one saturated branched-chain aliphatic monohydric alcohol having between 16 and 36, carbon atoms and wherein said monocarboxylic acid is at least one saturated straight-chain aliphatic monocarboxylic acid having between 5 and 10, preferably 5 and 7, carbon atoms. In preferred lubricants, the monoester, or mixtures of monoesters, have a pour point of not more than -30° C. and a non-polarity index of at least 80.