Patent ID: 6670432
Filing Date: 2003-12-30
Classification: C07F,C08F,C08L,Y10S

Abstract:
A copolymer according to formula prepared by polymerizing a monomer mixture comprising ethylene and styrene in the presence of a catalyst comprising the following components: a) a metal coordination complex corresponding to the formula: â€ƒwherein: M is a metal of Group 4 or the Lanthanide Series of the Periodic Table of the Elements; Cp* is a cyclopentadienyl or a substituted cyclopentadienyl group wherein one or more carbons of the cyclopentadienyl group are substituted with a C1-20 hydrocarbyl radical, C1-20 halohydrocarbyl radical, C1-20 hydrocarbyl substituted Group 14 metalloid radical, or halogen radical, or optionally two or more such substituents together form a fused ring system; said Cp* being bound in an &eegr;5 bonding mode to M; Z is a moiety comprising boron, or a member of Group 14 of the Periodic Table of the Elements, and optionally sulfur or oxygen, said moiety having up to 20 non-hydrogen atoms, and optionally Cp* and Z together form a fused ring system; X independently each occurrence is an anionic ligand group having up to 30 non-hydrogen atoms; n is 1 or 2 depending on the valence of M; and Y is an anionic ligand group bonded to Z and M comprising nitrogen, phosphorus, oxygen or sulfur and having up to 20 non-hydrogen atoms, optionally Y and Z together form a fused ring system; and b) an activating cocatalyst.