Polymerization of alpha -olefins with transition metal catalysts based on bidentate ligands containing pyridine or quinoline moiety

摘要

Disclosed is a novel bidentate pyridine transition metal catalyst having the general formula where Y is O, S, NR, each R is independently selected from hydrogen or C1 to C6 alkyl, each R' is independently selected from C1 to C6 alkyl, C1 to C6 alkoxy, C6 to C16 aryl, halogen, or CF3, M is titanium, zirconium, or hafnium, each X is independently selected from halogen, C1 to C6 alkyl, C1 to C6 alkoxy, or L is X, cyclopentadienyl, C1 to C6 alkyl substituted cyclopentadienyl, indenyl, fluorenyl, or and "n" is 1 to 4. Also disclosed is a method of making a poly- alpha -olefin comprising polymerizing an alpha -olefin monomer using that catalyst or a catalyst that has the general formula where Y, M, L, X, and R' were previously defined.