申请人:JX Nippon Oil & Energy Corporation
公开号:EP2690164A1
公开(公告)日:2014-01-29
A viscosity index improver of the present invention contains a star polymer obtained by a reaction of divinylbenzene with alkyl methacrylate containing stearyl methacrylate, the star polymer having a core part and an arm part, wherein the core part is derived from the divinylbenzene and the ann part is a polymer chain of the alkyl methacrylate. A lubricant oil additive and a lubricant oil composition of the present invention contain the above viscosity index improver.
本发明的一种粘度指数改进剂含有一种星形聚合物,该聚合物是由二乙烯基苯与含有甲基丙烯酸硬脂酯的甲基丙烯酸烷基酯反应而得,该星形聚合物具有芯部和臂部,其中芯部来自二乙烯基苯,臂部是甲基丙烯酸烷基酯的聚合物链。本发明的润滑油添加剂和润滑油组合物含有上述粘度指数改进剂。