Patent ID: 6166154
Filing Date: 2000-12-26
Classification: C08F,Y10S

Abstract:
A process for the polymerization of olefins, which comprises contacting at least one olefin monomer under polymerization conditions with an activated catalyst composition prepared by contacting outside of a polymerization reactor a single site catalyst precursor selected from the croup consisting of a) metallocenes, b) complexes of transition metals, cycloalkadienyl ligands and one or more heteroallyl moieties, c) constrained geometry catalysts, and d) di(imine) metal complexes with an activating cocatalyst before, during, or after contacting the single site catalyst precursor with 1-hexene that does not polymerize during either contacting, wherein the activity of the activated catalyst composition is at least 10 percent greater than the activity of a second activated catalyst-composition prepared by contacting the same single site catalyst precursor with the same activating cocatalyst but without contacting the 1-hexene.