Lubricant additive compositions having improved viscosity index increase properties
    79.
    发明授权
    Lubricant additive compositions having improved viscosity index increase properties 有权
    具有改善粘度指数的润滑添加剂组合物增加性能

    公开(公告)号:US08778857B2

    公开(公告)日:2014-07-15

    申请号:US12537029

    申请日:2009-08-06

    Applicant: Peter Growcott

    Inventor: Peter Growcott

    Abstract: A lubricant composition, additive concentrate, and method for lubricating an engine. The crankcase lubricant has less than 30 weight percent of a relatively low Noack volatility base oil and a viscosity additive. The viscosity additive has a minor effective amount of sacrificial polymeric viscosity index improver having a shear stability index (SSI) of greater than about 45 and a major amount of a viscosity index improver having an SSI of less than about 26. The minor amount of sacrificial viscosity index improver additive is effective to provide a lubricant composition having a ratio of absolute viscosity increase at 40° C. to an absolute viscosity increase at 40° C. of an RL 216 reference oil of less than about 0.8.

    Abstract translation: 润滑剂组合物,添加剂浓缩物和用于润滑发动机的方法。 曲轴箱润滑剂具有小于30重量%的相对较低的Noack挥发性基础油和粘度添加剂。 粘度添加剂具有少量有效量的牺牲聚合物粘度指数改进剂,其剪切稳定性指数(SSI)大于约45,而主要量的SSI小于约26的粘度指数改进剂。少量的牺牲 粘度指数改进剂添加剂有效地提供一种润滑剂组合物,该润滑剂组合物在40℃下的绝对粘度增加的比率与小于约0.8的RL 216参比油在40℃下的绝对粘度增加有关。

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