The present invention provides star-shaped polymers comprising cores of polymerised diisopropenylbenzene and at least three polymeric arms connected to each core, the polymeric arms comprising polyisobutylene; a process for their preparation; and lubricating oil compositions containing them.
本发明提供星形聚合物,包括聚合
二异丙苯的芯和连接到每个芯的至少三个聚合物臂,聚合物臂包括聚
异丁烯;本发明还提供了制备工艺和含有本发明的润滑油组合物。