04794096 is referenced by 318 patents and cites 14 patents.

The present invention provides a catalyst system for the polymerization and copolymerization of olefins with the system comprising a chiral, stereorigid hafnium metallocene catalyst in combination with an aluminum compound. The aluminum compound is preferably an alumoxane and may be a mixture of alumoxane and trimethyl aluminum. It was discovered that this mixture causes a transformation of the catalyst over time. The catalyst system may also include a solvent to increase the solubility of the metallocene catalyst. It was discovered that these catalyst systems produce useful polymer products with molecular weights greater than 10,000.

Title
Hafnium metallocene catalyst for the polymerization of olefins
Application Number
34341
Publication Number
4794096
Application Date
September 11, 1987
Publication Date
December 27, 1988
Inventor
John A Ewen
Houston
TX, US
Agent
M Norwood Cheairs
Stuart L Watt
John K Abokhair
Assignee
Fina Technology
TX, US
IPC
C08F 4/64
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