Supported phosphinimine-Cp catalysts
AssigneeNOVA Chemicals (International) S.A.
InventorsDouglas W. Stephan, Jeff C. Stewart, Daryll G. Harrison
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Abstract
A catalyst component which is especially useful in so-called "slurry" or "gas phase" olefin polymerizations and which comprises an organometallic complex of a group 4 metal (having a cyclopentadienyl-type ligand and a phosphinimine ligand) and a particulate support. The catalyst component forms an excellent catalyst system when combined with an activator such as an aluminoxane or a so-called "substantially non-coordinating anion". In a preferred embodiment the organometallic complex and the activator are both deposited on the particulate support.
Claims20
A catalyst component for olefin polymerization comprising:
- (a) an organometallic complex comprising
- A) one, and only one, metal atom of a group 4 metal selected from Ti, Hf, and Zr;
- B) a cyclopentadienyl-type ligand;
- C) a phosphinimine ligand;
- and
- D) two univalent ligands;
- and
- (b) a particulate support.
Dependencies are inferred from the claim text.