Patent ID: 7842763
Filing Date: 2010-11-30
Classification: C08F,Y10S,Y10T

Abstract:
1. A method of polymerizing olefins comprising contacting an olefin monomer and optionally at least one olefin comonomer with a catalyst composition under polymerization conditions, wherein the catalyst composition comprises the contact product of at least one first metallocene compound, at least one second metallocene compound, at least one chemically-treated solid oxide, and at least one organoaluminum compound, wherein: a) the at least one first metallocene compound is selected from an ansa-metallocene having the following formula: wherein M wherein (X wherein (X b) the at least one second metallocene compound is an ansa-metallocene having the following formula: wherein M wherein (X wherein (X wherein (X wherein (X c) the at least one chemically-treated solid oxide comprises a solid oxide treated with an electron-withdrawing anion; and d) the at least one organoaluminum compound has the following formula: wherein (X 9 ) is a hydrocarbyl having from 1 to about 20 carbon atoms; (X 10 ) is selected from alkoxide or aryloxide having from 1 to about 20 carbon atoms, halide, or hydride; and n is a number from 1 to 3, inclusive.