Catalyst system for olefin polymerization

Disclosed are a process for preparing a procatalyst suitable for preparing a catalyst composition for olefin polymerization, a procatalyst obtained by or obtainable by said process; and a catalyst composition for olefin polymerization comprising the procatalyst. In particular, the activator according to formula (I) can be used to prepare a supported Ziegler-Natta type procatalyst for use in a process for preparing polyolefins. 公开了一种制备适合于制备用于烯烃聚合的催化剂组合物的主催化剂的方法，一种通过或能够通过所述方法获得的主催化剂；和一种包含所述主催化剂的用于烯烃聚合的催化剂组合物。具体而言，根据式(I)的活化剂可用于制备用于制备聚烯烃的方法的负载的齐格勒-纳塔型主催化剂。