CYCLIC ORGANOSILICON COMPOUNDS AS ELECTRON DONORS IN ZEIGLER-NATTA CATALYST SYSTEMS FOR PRODUCING PROPYLENE POLYMER HAVING HIGH MELT-FLOWABILITY
申请人:Zhang Lei
公开号:US20130109820A1
公开(公告)日:2013-05-02
Cyclic organosilicon compounds having a structure represented by the general formula
and a method for using thereof as a component of catalysts for producing propylene polymer having a very high melt-flowability are disclosed. The cyclic organosilicon compounds are employed as external electron donors in Ziegler-Natta catalyst systems to dramatically improve the hydrogen response, and therefore the catalyst systems can be used to prepare polymer having high melt-flowability and high isotacticity at high yield.
本发明公开了一种具有以下通式的结构的环状有机硅化合物及其用作生产具有非常高熔体流动性的丙烯聚合物催化剂组分的方法。这些环状有机硅化合物被用作Ziegler-Natta催化剂体系中的外部电子给体,以显著提高氢响应,因此可以使用该催化剂体系制备高产量、高熔体流动性和高异构度的聚合物。