Back to results
US 7,001,962 B2Granted
Olefin polymerization catalyst system
AssigneeNOVA Chemicals (International) S.A.
InventorsXiaoliang Gao, Jessie Leighton, Matthew Gerald Kowalchuk, P. Scott Chisholm
Life of this patent
Estimating the term…
Abstract
A catalyst system comprises 1) a group 4 organometallic catalyst and 2) an activator comprising a solid zirconium acid component and a metal alkyl. The catalyst system is inexpensive and is highly active for the polymerization of olefins. Preferred organometallic catalysts contain a cyclopentadienyl ligand, a phosphinimine ligand and or a ketimide ligand.
Claims4
A catalyst system comprising:
- a) group 4 organometallic catalyst having at least one halide ligand;
- k) a solid zirconium acid component;
- and
- c) a metal alkyl,
- wherein said solid zirconium acid comprises zirconium, oxygen and at least one of sulphur or phosphorus.
2 more elements
A process for the polymerization of olefins in the presence of a catalyst system comprising:
- a) a group 4 organometallic catalyst having at least one halide ligand;
- b) a solid zirconium acid component;
- and
- c) a metal alkyl,
- wherein said solid zirconium acid comprises zirconium, oxygen and at least one of sulphur or phosphorus.
2 more elements
Dependencies are inferred from the claim text.