申请人:Mitsubishi Chemical Corporation
公开号:US05942459A1
公开(公告)日:1999-08-24
The object of the present invention is to provide a polyolefin having a good particle property in a high yield without use of an expensive alumoxane. The present invention comprises a catalyst for olefin polymerization comprising the following ingredients (A), (B) and (C), and a process for preparing an olefin polymer with use of the catalyst: Component (A): a transition metal compound having at least one conjugated five-membered ring ligand, the transition metal being in the Groups IV-VI of the Periodic Table, Component (B): an organoaluminum compound, and Component (C): a finely divided particle composition comprising 0.1-99.9% by weight of boric acid.
本发明的目的是提供一种聚烯烃,其具有良好的颗粒特性,且不需要使用昂贵的氧化铝。本发明包括用于烯烃聚合的催化剂,该催化剂包括以下成分(A)、(B)和(C),以及使用该催化剂制备烯烃聚合物的方法:组分(A):至少具有一个共轭五元环配体的过渡金属化合物,该过渡金属位于周期表的IV-VI族,组分(B):有机铝化合物,以及组分(C):包含0.1-99.9重量%硼酸的细粉末组成。