Patent ID: 6919413
Filing Date: 2005-07-19
Classification: C07F,C08F

Abstract:
1. A method of polymerizing olefins comprising combining under polymerization conditions a catalyst precursor composition and an activator with one or more olefins selected from the group consisting of ethylene, propylene, 1-butene, 1-octene, and 1-decene; the catalyst precursor composition represented by one or more: wherein T is a bridging group containing 2 or more bridging atoms; M is an atom selected from Groups 3 to 7 of the Periodic Table of the Elements, Z is a coordination ligand; each L is a monovalent, bivalent, or trivalent anionic ligand; n is an integer from 1 to 6; X is nitrogen or phosphorus; Y is a heteroatom selected from the group consisting of nitrogen, phosphorus, oxygen, and sulfur; R is a C R′ is a bulky substituent having from 3 to 50 non-hydrogen atoms that is sterically hindering with respect to Y.