Patent ID: 7312283

Claim:
A catalyst composition comprising a first metallocene compound, an unbridged second metallocene compound, an activator-support, and an organoaluminum compound, wherein: (a) the first metallocene compound has the formula: (X 1 )(X 2 R 1 2 )(X 3 )(X 4 )M 1 ; wherein (X 1 ) is cyclopentadienyl, indenyl, or fluorenyl; (X 2 ) is fluorenyl; (X 1 ) and (X 2 ) are connected by a disubstituted bridging group comprising one atom bonded to both (X 1 ) and (X 2 ), wherein the atom is carbon or silicon; a first substituent of the disubstituted bridging group is an aliphatic or aromatic group having from 1 to about 20 carbon atoms; a second substituent of the disubstituted bridging group is an unsaturated aliphatic group having from 3 to about 10 carbon atoms; R 1 is H, an alkyl group having from 1 to about 12 carbon atoms, or an aryl group having from 1 to about 12 carbon atoms; (X 3 ) and (X 4 ) are independently an aliphatic group, an aromatic group, a cyclic group, a combination of aliphatic and cyclic groups, or a substituted derivative thereof, having from 1 to about 20 carbon atoms, or a halide; M 1 is Zr or Hf; (b) the second metallocene has the formula: (X 5 )(X 6 )(X 7 )(X 8 )M 2 ; wherein (X 5 ) is a substituted or unsubstituted cyclopentadienyl, or substituted or unsubstituted indenyl, any substituent on (X 5 ) is independently a linear or branched substituted or unsubstituted alkyl group, or a linear or branched substituted or unsubstituted alkenyl group, having from 1 to about 20 carbon atoms; (X 6 ) is a substituted or unsubstituted cyclopentadienyl, or substituted or unsubstituted indenyl, any substituent on (X 6 ) is independently a substituted linear alkyl group, a branched substituted or unsubstituted alkyl group, or a linear or branched substituted or unsubstituted alkenyl group, having from 1 to about 20 carbon atoms; (X 7 ) and (X 8 ) are independently an aliphatic group, an aromatic group, a cyclic group, a combination of aliphatic and cyclic groups, or a substituted derivative thereof, having from 1 to about 20 carbon atoms, or a halide; and M 2 is Zr or Hf.