Patent ID: 9175107
Filing Date: 2015-11-03
Classification: C08F

Abstract:
1. A slurry polymerization method for producing a very-high or ultra-high molecular weight polyethylene composition, the method comprising contacting one or more monomers with a supported catalyst, the supported catalyst comprising: a support, a metal-ligand complex deposited on the support at a loading from about 1 μmol/gram of supported catalyst to about 100 μmol/gram of supported catalyst, the metal-ligand complex characterized by the general formula: wherein the O-AR-AR-O—B—O-AR-AR-O fragment of the general formula is defined by a ligand selected from the group consisting of wherein at least two of the bonds from the oxygens (O) to M are covalent, with the other bonds being dative; M is a metal selected from the group consisting of Hf and Zr; each L is independently a moiety that forms a covalent dative or ionic bond with M; and n′ is 1, 2, 3 or 4; and, an activator.