申请人:Univation Technologies, LLC
公开号:US10982024B2
公开(公告)日:2021-04-20
Embodiments of the present disclosure directed towards polymerization catalysts having improved ethylene enchainment and/or improved catalyst productivity. As an example, the present disclosure provides a polymerization catalyst of Formula (I), wherein each of R1 to R12 is independently a C1 to C20 alkyl, aryl or aralkyl group, or a hydrogen, wherein at least one of R4 to R7 is not a hydrogen, wherein M is a Group 4 metal, and wherein, each X is independently a halide, C1 to C20 alkyl, aralkyl or hydrogen.
本公开的实施方案针对具有改进的乙烯链化和/或改进的催化剂生产率的聚合催化剂。作为一个例子,本公开提供了一种式(I)的聚合催化剂,其中 R1 至 R12 中的每一个都独立地为 C1 至 C20 烷基、芳基或芳烷基或氢,其中 R4 至 R7 中的至少一个不是氢,其中 M 为第 4 族金属,并且其中每一个 X 都独立地为卤化物、C1 至 C20 烷基、芳烷基或氢。