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US 2016/0017069 A1Published application
Catalyst System With Three Metallocenes For Producing Broad Molecular Weight Distribution Polymers
AssigneeChevron Phillips Chemical Company LP
InventorsQing Yang, Max P. McDaniel, Tony R. Crain, Youlu Yu, Yongwoo Inn
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Abstract
Disclosed herein are polymerization processes for the production of olefin polymers. These polymerization processes use a catalyst system containing three metallocene components, often resulting in polymers having a reverse comonomer distribution and a broad and non-bimodal molecular weight distribution.
Claims21
1-13. (canceled)
A catalyst composition comprising:
- catalyst component I comprising an unbridged zirconium or hafnium based metallocene compound and/or an unbridged zirconium and/or hafnium based dinuclear metallocene compound;
- catalyst component II comprising a bridged zirconium based metallocene compound with a fluorenyl group, and with no aryl groups on the bridging group;
- catalyst component III comprising a bridged zirconium or hafnium based metallocene compound with a fluorenyl group, and an aryl group on the bridging group;
- an activator;
- and
- optionally, a co-catalyst.
3 more elements
16-20. (canceled)
Dependencies are inferred from the claim text.