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发明公开
CN104508097A 发动机油组合物 无效 - 驳回 复审申请

发动机油组合物
摘要：
一种发动机油组合物，其含有：100℃下的运动粘度为1～5mm2/s的润滑油基础油；式(1)所示的结构单元的比率为30～90摩尔％、超声波剪切试验中的PSSI为15以下的聚(甲基)丙烯酸酯类粘度指数改进剂；和摩擦调整剂，所述发动机油组合物的100℃下的运动粘度为4～8mm2/s，150℃下的HTHS粘度小于2.6mPa·s。[R1表示氢或甲基，R2表示碳数6以下的直链状或支链状的烃基。]
摘要（英）：

An engine oil composition has a kinematic viscosity at 100 DEG C of 4-8 mm2/s, a HTHS viscosity at 150 DEG C of less than 2.6mPas, and contains: a lubricating oil base oil of which the kinematic viscosity at 100 DEG C is 1-5 mm2/s; a poly(meth)acrylate viscosity index improver of which the ratio of a structural unit represented by formula (1) is 30-90 Mol%, and of which the PSSI measured by ultrasonic shear test is at most 15; and a friction modifier. (R1 represents hydrogen or a methyl group, and R2 represents a straight-chain or branched hydrocarbon group having a carbon number of 6 or less.)

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