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US 10,118,975 B2Granted
Bicyclic bridged metallocene compounds and polymers produced therefrom
AssigneeChevron Phillips Chemical Company LP
InventorsJeremy M. Praetorius, Qing Yang, Connor D. Boxell, Tony R. Crain
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Abstract
Disclosed herein are catalyst compositions containing bicyclic bridged metallocene compounds. These catalyst compositions can be used for the polymerization of olefins. For example, ethylene polymers produced using these catalyst compositions can be characterized by low molecular weights and high melt flow rates, and can be produced without the addition of hydrogen.
Claims11
A metallocene compound having the formula:
- wherein:
- M is Ti, Zr, or Hf;
- each X independently is a monoanionic ligand;
- E is a hydrocarbon bicyclic bridging group with a single carbon atom connected to Cp1 and Cp2;
- and
- Cp1 and Cp2 independently are a substituted or unsubstituted cyclopentadienyl, indenyl, or fluorenyl group.
3 more elements
Dependencies are inferred from the claim text.