Bis-phosphinimine catalyst
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United States of America Patent
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May 29, 2001
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N/A
app pub date -
Jun 15, 1999
filing date -
Jul 21, 1998
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Abstract
Organometallic complexes having two phosphinimine ligands and at least one activatable ligand are catalyst components for olefin polymerization. Preferred polymerization systems are prepared by combining the organometallic complexes with an ionic activator and/or an alumoxane. Preferred catalyst components contain titanium, zirconium, or hafnium and are activated with an ionic activator to form catalysts for ethylene polymerization.
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