Patent ID: 7144964

Claim:
A process which comprises polymerizing ethylene in solution at a temperature greater than 120° C. in the presence of an aluminum compound and a preassembled bimetallic Ziegler-Natta catalyst having the general formula: wherein M′ is a Group 4–6 transition metal different from V; each L is independently selected from the group consisting of halide, oxy, alkoxy, aryloxy, mercapto, siloxy, aluminoxy, borate, alkylamino, and C 1 –C 30 hydrocarbyl; L′ is selected from the group consisting of halide, oxy, alkoxy, aryloxy, mercapto, siloxy, aluminoxy, borate, alkylamino, arylamino, and —OGO— wherein G is a linking group containing silicon, boron, aluminum, or two pi-bonded carbons; x satisfies the valence of M′ and y satisfies the valence of V.