Patent ID: 7199073

Claim:
A catalyst composition comprising a first metallocene compound, a second metallocene compound, a third metallocene compound, a chemically-treated solid oxide, and an organoaluminum compound, wherein: (a) the first metallocene compound and the second metallocene compound are different from each other and have the formula: (RCpR′) 2 (X 1 )(X 2 )M 1 ; wherein each R is an aliphatic group having from about 3 to about 10 carbon atoms; wherein each R′ independently is H or an aliphatic group having up to 2 carbon atoms; wherein (X 1 ) and (X 2 ) independently are a halide; wherein M 1 is Zr or Hf; and (b) the third metallocene compound has the formula: (Cp) 2 (X 3 )(X 4 )M 2 ; 1) wherein (X 3 ) and (X 4 ) independently are a halide; wherein M 2 is Zr or Hf; or (X 5 )(X 6 )(X 7 )(X 8 )M 3 ; 2) wherein (X 5 ) and (X 6 ) independently are a cyclopentadienyl or an indenyl group; wherein (X 5 ) and (X 6 ) are connected by a methylene, an ethylene, or a dimethyl silicon bridging group; wherein (X 7 ) and (X 8 ) independently are a halide; wherein M 3 is Zr or Hf; and wherein Cp is a cyclopentadienyl group.