Patent ID: 7951882

Claim:
A copolymer formed by polymerizing propylene, 4-methyl-1-pentene, styrene, or another C 4-20 α-olefin, and a copolymerizable comonomer in the presence of a composition comprising the admixture or reaction product resulting from combining: (A) a first olefin polymerization catalyst comprising a complex corresponding to the formula R 20 is an aromatic or inertly substituted aromatic group containing from 5 to 20 atoms not counting hydrogen, or a polyvalent derivative thereof; T 3 is a hydrocarbylene or silane group having from 1 to 20 atoms not counting hydrogen, or an inertly substituted derivative thereof; M 3 is a Group 4 metal; G is an anionic, neutral or dianionic ligand group; g is a number from 1 to 5 indicating the number of G groups; and bonds and electron donative interactions are represented by lines and arrows respectively; (B) a second olefin polymerization catalyst capable of preparing polymers differing in chemical or physical properties from the polymer prepared by catalyst (A) under equivalent polymerization conditions; and (C) a chain shuttling agent.