Patent ID: 7951882
Filing Date: 2011-05-31
Classification: C08F,C08L,Y10T

Abstract:
1. 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 T M 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.