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    • 9. 发明申请
    • LUBRICANT OIL COMPOSITION
    • 润滑油组成
    • US20120071374A1
    • 2012-03-22
    • US13375061
    • 2010-01-25
    • Akira YaguchiShigeki MatsuiTeppei Tsujimoto
    • Akira YaguchiShigeki MatsuiTeppei Tsujimoto
    • C10M145/14
    • C10M169/041C10M2203/1006C10M2203/1025C10M2205/022C10M2209/084C10N2220/022C10N2230/02C10N2230/68C10N2240/10C10M2205/024
    • A lubricant oil composition comprising: a lubricant base oil whose kinematic viscosity at 100° C. is 1 to 6 mm2/s, % Cp is not less than 70, and % CA is not more than 2; a first viscosity index improver in which the ratio A/B of a viscosity increasing effect A in the equation (1) to a viscosity increasing effect B in the equation (2) when added to the lubricant base oil is a value of not less than 4.5, and a PSSI is not more than 30; and a second viscosity index improver in which the ratio A/B when added to the lubricant base oil is a value less than 4.5: A=X−X0   (1) B=Y−Y0   (2) wherein A represents a viscosity increasing effect of the kinematic viscosity at 100° C., B represents a viscosity increasing effect of the HTHS viscosity at 150° C., X represents a kinematic viscosity at 100° C. of a mixture of the lubricant base oil with 3% by mass of the first or second viscosity index improver, X0 represents a kinematic viscosity at 100° C. of the lubricant base oil, Y represents an HTHS viscosity at 150° C. of a mixture of the lubricant base oil with 3% by mass of the first or second viscosity index improver, and Y0 represents an HTHS viscosity at 150° C. of the lubricant base oil.
    • 1.一种润滑油组合物,其特征在于,含有100℃下的运动粘度为1〜6mm 2 / s的润滑油基础油,Cp不小于70,%CA不大于2; 在添加到润滑油基础油中时,式(1)中的粘度增加效果A与式(2)中的粘度增加效果B的比A / B的值为不小于 4.5,PSSI不超过30; 和其中添加到润滑油基础油中的比率A / B小于4.5的第二粘度指数改进剂:A = X-X0(1)B = Y-Y0(2)其中A表示增粘效果 的运动粘度为100℃,B为150℃时的HTHS粘度的粘度增加效果,X表示润滑油基油与3质量%的混合物的混合物在100℃下的运动粘度 第一或第二粘度指数改进剂,X0表示润滑剂基油的100℃下的运动粘度,Y表示润滑油基油与3质量%第一油性混合物在150℃下的HTHS粘度 或第二粘度指数改进剂,Y0表示润滑剂基础油在150℃下的HTHS粘度。