Patent ID: 8598284

Claim:
A polymerization process comprising contacting at least one monomer with a bimetallic catalyst, the bimetallic catalyst comprising (a) the oxygen-bridged bimetallic complex of the general formula (I): Cp 2 R 1 M 1 -O-M 2 R 2 2Cp (I) wherein Cp is independently a cyclopentadienyl, indenyl or fluorenyl ligand that can be substituted, R 1 , R 2 independently are halide, linear or branched or cyclic alkyl, aryl, amido, phosphido, alkoxy or aryloxy groups that can be substituted, M 1 is Zr, Ti or Hf, and M 2 is Ti or Zr; and, (b) an activator selected from an alumoxane, trialkylaluminum, or a fluoroorganoborate compound, or a mixture of two or more of these, wherein the contacting is under conditions sufficient to cause polymerization of the at least one monomer.