OLEFIN POLYMERIZATION CATALYST COMPONENT AND CATALYST SYSTEM AND POLYMERIZATION PROCESS USING SUCH A CATALYST SYSTEM

摘要

The invention relates to a catalyst component and a catalyst system for the preparation of high molecular weight ethylene or α-olefin homopolymers, ethylene-α-olefin copolymers, terpolymers or tetrapolymers, in a polymerization process, which is expediently effected in solution, at elevated temperature, preferably at least 80 °C. The catalyst system comprises a group 4-6 metal, preferably group 4 metal, a cyclic ligand (such as a cyclopentadienyl-type ligand), which forms a delocalized π-bond with the metal M, a monohapto bonded 1,3-diaza-2-imino heterocyclic ligand (such as an iminoimidazolidine-type ligand) and anionic ligands and a catalyst activator coupound.