Catalyst obtained by prepolymerization of polyolefin and olefin polymerization method using the same
申请人:——
公开号:US20040063862A1
公开(公告)日:2004-04-01
The present invention provides a prepolymerized olefin polymerization catalyst and olefin polymerization method using the same. More particularly, the present invention provides a prepolymerized catalyst that is encapsulated with macromonomers produced by polymerizing olefin monomers with a vinyl-terminated polysiloxane compound in the presence of a solid titanium catalyst for olefin polymerization having been previously surface treated with silane compounds containing two or more vinyl groups, and a method for producing polyolefin having a high melt strength using the catalyst.
本发明提供了一种预聚合烯烃聚合催化剂和使用该催化剂的烯烃聚合方法。更具体地说,本发明提供了一种预聚合催化剂,该催化剂与大单体封装在一起,大单体是由烯烃单体与乙烯基封端聚硅氧烷化合物在固体钛催化剂存在下聚合而成的,固体钛催化剂用于烯烃聚合,之前已用含有两个或两个以上乙烯基的硅烷化合物进行过表面处理;本发明还提供了一种使用该催化剂生产具有高熔体强度的聚烯烃的方法。