Patent ID: 8623973
Filing Date: 2014-01-07
Classification: C08F

Abstract:
1. A method for reducing a melt flow property of an olefin polymer, the method comprising: (a) contacting a catalyst composition with an olefin monomer and an optional olefin comonomer in a polymerization reactor system under polymerization conditions to produce the olefin polymer, wherein the catalyst composition comprises a metallocene compound, an activator-support, and an optional co-catalyst; and (b) introducing an amount of a transition metal-modified activator-support into the polymerization reactor system to reduce the melt flow property of the olefin polymer, wherein the transition metal-modified activator-support comprises a solid oxide treated with an electron-withdrawing anion and impregnated with a Group VIII transition metal, and wherein the electron-withdrawing anion comprises sulfate and/or fluoride.