Patent ID: 7163907
Filing Date: 2007-01-16
Classification: C07F,C08F

Abstract:
1. A catalyst system for the production of polyolefins comprising: (A) a Group IV B transition metal component represented by one of the two general formulae wherein M is Zr, Hf or Ti and is in its highest formal oxidation state (+4, d 0 complex); (C (JR′ each Q is independently, hydride, C “y” is 0 or 1; when “y” is 1, T is a covalent bridging group containing a Group IV-A or V-A element; L is a neutral Lewis base; and “w” is a number from 0 to 3; wherein M′ has the same meaning as M and Q′ has the same meaning as Q; and (B) an activator compound comprising (1) a cation; and (2) a compatible noncoordinating anion.