Patent ID: 7001863
Filing Date: 2006-02-21
Classification: C07F,C08F

Abstract:
1. A catalyst precursor composition selected from the group consisting of those represented by: wherein T is a bridging group containing 2 or more bridging atoms; M is zirconium; Z is a coordination ligand; each L is a monovalent, bivalent, or trivalent anionic ligand; n is an integer from 1 to 6; m is an integer from 1 to 3; k has the value of 2 when X is nitrogen or phosphorus, and k has the value of 1 when X is oxygen or sulfur; X and Y are heteroatoms each independently selected from nitrogen, phosphorus, oxygen or sulfur; R is a non-bulky substituent selected from straight and branched chain alkyl groups, provided that when R is a branched or chained alkyl group, the branch point is at least 3 atoms removed from X; and R′ is a bulky substituent selected from alkyl, alkenyl, cycloalkyl, alkylaryl, arylalkyl, polymeric groups and heteroatom containing groups thereof; wherein there is branching within three atoms of Y and wherein R′ comprises from 3 to 50 non-hydrogen atoms.