Disclosed are metallocene compounds, catalyst compositions comprising at least one metallocene compound, processes for polymerizing olefins, methods for making catalyst compositions, olefin polymers and articles made from olefin polymers. In an aspect, a metallocene compound and catalyst composition are disclosed in which the metallocene contains at least one indenyl ligand, the indenyl ligand containing at least one halogenated substituent, such as a fluorinated substituent. These metallocene compounds and catalyst compositions can produce polyethylene having unexpectedly low levels of short chain branching.
公开了茂
金属化合物、包含至少一种茂
金属化合物的催化剂组合物、聚合烯烃的工艺、制造催化剂组合物的方法、烯烃聚合物和由烯烃聚合物制成的物品。在一个方面,公开了茂
金属化合物和催化剂组合物,其中茂
金属含有至少一个
茚基配位体,
茚基配位体含有至少一个卤化取代基,例如
氟化取代基。这些茂
金属化合物和催化剂组合物可以生产出具有意想不到的低短链支化
水平的聚
乙烯。