Patent ID: 6884747

Claim:
A mixed metallocene catalyst system comprising: a) a dimethylsilyl-bridged bis-indenyl zirconocene dichloride, wherein said indenyl is saturated; and b) a dimethylsilyl-bridged bis-indenyl zirconocene dichloride, wherein said indenyl is unsaturated wherein said a) is dimethylsilylbis(tetrahydro-1-indenyl) zirconium dichloride, b) is rac-dimethylsilyibis(1-indenyl)zirconium dichloride, and wherein said a) and said b) are present in said mixed metallocene catalyst system in a ratio of 90:10, 10:90, 80:20, 20:80, 60:40, 40:60, or 50:50, and wherein said mixed metallocene catalyst system is activated b one of methylalumoxane, modified methylalumoxane, non-coordinating anions, or mixtures thereof.