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US 7,521,572 B2Granted
Polymerization catalysts and process for producing bimodal polymers in a single reactor
AssigneeChevron Phillips Chemical Company LP
InventorsKumudini C. Jayaratne, Michael D. Jensen, Qing Yang
Life of this patent
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Abstract
Catalyst compositions comprising a first metallocene compound, a second metallocene compound, an activator-support, and an organoaluminum compound are provided. An improved method for preparing cyclopentadienyl complexes used to produce polyolefins is also provided.
Claims16
A metallocene compound having the following structure:
- wherein R2 is H or —CH3;
- wherein R3 CH2═CHCH2—, CH2═CH(CH2)2—, Ph(CH2)3—, or CH3(CH2)3-;
- wherein X5 and X6 independently are a halide;
- and
- wherein M2 is Zr or Hf.
2 more elements
A metallocene compound having the following structure:
- wherein R2 is —CH3;
- wherein R3 is CH2═CHCH2—, CH2═CH(CH2)2—, Ph(CH2)3—, CH3(CH2)3-, or H;
- wherein X5 and X6 independently are a halide;
- and
- wherein M2 is Zr or Hf.
2 more elements
A metallocene compound represented by any of the following structures:
Dependencies are inferred from the claim text.