Patent ID: 6417129
Filing Date: 2002-07-09
Classification: C08F

Abstract:
A catalyst composition for polymerization of olefins comprising:(ia) a catalyst precursor corresponding to the formula: MgdTi(ORe)eXf(ED)g, wherein Reis an aliphatic or aromatic hydrocarbon radical having 1 to 14 carbon atoms or Corâ€² wherein Râ€² is an aliphatic or aromatic hydrocarbon radical having 1 to 14 carbon atoms; each ORe group is the same or different; X is independently chlorine, bromine or iodine; ED is an organic Lewis base electron donor; d is 0.5 to 56;e is 0, 1, or 2; f is 2 to 116; and g is 1.5d+2 (ib) a cocatalyst compound of the formula RnAlX3-n wherein each R is independently a saturated aliphatic hydrocarbon radical having 1 to 14 carbon atoms; each X is a halogen, and n is 1 to 3; and (ii) a lanthanide compound represented by the following formula: CpaLnRbbLc wherein Cp is a cyclopentadienyl or substituted cyclopentadienyl ligand; Ln is a lanthanide metal; Rb is a hydride, alkyl, silyl, halide, or aryl group; L is an electron donor; a+b is the valence of the lanthanide metal; and c is a number from 1 to 8.