Patent ID: 6090740
Filing Date: 2000-07-18
Classification: C08F,Y10S

Abstract:
A method for preparing a supported metallocene catalyst system, said method comprising combining inorganic porous support material having an average particle size of from about 30.mu. to about 40.mu., metallocene, and alumoxane wherein the amount of metallocene is in the range of from 0.06 mmoles transition metal/g support material to about 0.005 mmoles transition metal/g support material, wherein the ratio of the aluminum from the alumoxane component to the transition metal of the metallocene component applied to the support is in the range between about 10:1 to about 300:1, and wherein the metallocene comprises an unbridged or achiral bridged component represented by the formula Cp.sub.m MR.sub.n X.sub.q wherein Cp is an unsubstituted or substituted cyclopentadienyl groups, M is zirconium or hafnium, and R and X are selected from the group consisting of a halogen atom hydrogen and an alkyl group, m+n+q=the valence of M, m is at least one and each of n and q equals 0, 1, 2, or 3.