Metallocene compounds, processes for the preparation thereof, catalyst components for olefin polymerization, and processes for the production of olefin polymers
Metallocene compounds, processes for the preparation thereof, catalyst components for olefin polymerization, and processes for the production of olefin polymers
申请人:Chisso Corporation
公开号:US06326493B1
公开(公告)日:2001-12-04
A metallocene compound is provided wherein to a transition metal compound is bonded a multidentate compound wherein a substituted cycloalkadienyl ring CA1 having therein a heteroaromatic group Ra containing an oxygen, sulfur or nitrogen atom on a cycloalkadienyl ring, preferably the five-membered ring thereof, and an unsubstituted or substituted cycloalkadienyl group CA2 or —(R1)N—, —O—, —S— or —(R1)P—, preferably CA2, more preferably a substituted cycloalkadienyl group identical with CA1 are bonded through a divalent linking group. The metallocene compound is suitable as a principal ingredient of a catalyst for the polymerization of olefins, particularly achieving a very high effect in making the molecular weight of a polypropylene higher.