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US 6,420,580 B1Granted
Catalyst compositions and method of polymerization therewith
AssigneeUnivation Technologies, LLC
InventorsMatthew W. Holtcamp, Ching-Tai Lue
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Abstract
Catalyst compositions, systems and methods, useful in polymerization processes, are disclosed, which utilize bridged metallocene catalysts, preferably including indenyl groups, bound to the transition metal and a vinyl group bound to the bridge.
Claims17
A process for polymerizing olefin(s) in the presence of a catalyst system comprising a transition metal compound represented by the following formula:
- wherein
- Y is hydrogen or a hydrocarbyl group, a halogen or a heteroatom,
- X and Z are independently a substituted or unsubstituted bulky ligand, provided however, that X and Z may not be a cyclopentadienyl or fluorenyl group,
- M is a group 4 metal,
- n is the oxidation state of the metal, preferably 3 or 4, preferably 4,
- each Q is, independently, an anionic leaving group.
3 more elements
Dependencies are inferred from the claim text.