Patent ID: 6630545
Filing Date: 2003-10-07
Classification: C07F,C08F,Y10S

Abstract:
A process for the polymerization of addition polymerizable monomers, comprising contacting an olefin monomer or mixture of olefin monomers under addition polymerization conditions with a catalyst composition comprising the reaction product or admixture of:(A) a metal complex corresponding to the formula: CpZMxL1Xâ€²xâ€², (IA); where Cp is an anionic, polycyclic, fused ring ligand system containing at least 4 fused rings, and bonded to M by means of delocalized &pgr;-electrons; M is titanium, zirconium or hafnium in the +2, +3 or +4 formal oxidation state; Z is either a cyclic or noncyclic ligand group containing delocalized &pgr;-electrons, including a second polycyclic ring system group as herein previously disclosed for Cp, said Z being bonded to M by means of delocalized &pgr;-electrons and optionally covalently bonded to Cp through a divalent bridging group, or Z is a divalent moiety lacking in delocalized &pgr;-electrons that is covalently bonded to Cp and M, or such a moiety comprising one &sgr;-bond by which it is bonded to Cp, and a neutral two electron pair able to form a coordinate-covalent bond to M; X is a monovalent anionic ligand group having up to 60 atoms other than hydrogen; L independently each occurrence is a neutral ligating compound having up to 20 atoms; Xâ€² is a divalent anionic ligand group having up to 60 atoms; x is 0, 1, 2, or 3; l is a number from 0 to 2, and xâ€² is 0 or 1, (B) a cocatalyst able to form an active polymerization catalyst species in combination with (A); and (C) a conjugated diene having 4 or 5 carbons; the molar ratio of (A):(B) being from 1:10,000 to 100:1 and the molar ratio of (C) to addition polymerizable compound being from 1:100,000 to 1:4.