Patent ID: 7081506

Claim:
An ethylene polymerization process comprising: providing a transition metal catalyst component characterized by the formula: wherein M is a transition metal selected from Groups 4–11 of the Periodic Table of Elements; n is an integer of from 1–3; Q is a halogen or a C 1 –C 2 alkyl group; PY is a pyridinyl group, which is coordinated with M through the nitrogen atom of said pyridinyl group; A is a methyl group, a phenyl group, or a substituted phenyl group; wherein: said catalyst component has C 2 symmetry and B 1 and B 2 are the same and are a 1-naphthyl group, a substituted 1-naphthyl group, a 5,6,7,8-tetrahydro-1-naphthyl group or an anthracenyl group; or said catalyst component exhibits C2v symmetry and B1 and B2 are the same and are a phenyl group or a substituted phenyl group; or said catalyst exhibits Cs symmetry and B 1 is a phenyl or substituted phenyl group and B 2 is different from B 1 and is a polyphenyl group or terphenyl group, providing an activating co-catalyst component; contacting said catalyst component and said co-catalyst component with ethylene in a polymerization reaction zone which is free of hydrogen or contains hydrogen in an amount which is less than 5 mol % of said ethylene under polymerization conditions to produce a polymer product by the polymerization of said ethylene; and recovering said polymer product from said reaction zone.