Patent ID: 6376406
Filing Date: 2002-04-23
Classification: C07F,C08F,Y10S

Abstract:
A composition comprising:A) a Group 4 transition metal complex corresponding to the following formula: wherein:M is titanium, zirconium, or hafnium in the +4, +3, or +2 oxidation state; Y1 and Y2 are independently an anionic, cyclic or non-cyclic, &pgr;-bonded group, NR1, PR1; NR12 or PR12; Z is boron; Q is a neutral, anionic or dianionic ligand group depending an the oxidation state of M; j is 1, 2 or 3 depending on the oxidation state of M and the electronic charge on Q; T independently each occurrence is: R1 is independently each occurrence hydrogen, a hydrocarbyl group, a tri(hydrocarbyl)silyl group, or a tri(hydrocarbyl)silylhydrocarbyl group, said R1 groups containing up to 20 atoms not counting hydrogen; R5 is R1 or N(R1)2; and two R1 groups together or one or more R1 groups together with R5 may optionally be joiled to form a ring structure; and A B) an activating cocatalyst.