Dual metallocene catalysts for polymerization of bimodal...

Details Dual metallocene catalysts for polymerization of bimodal... Dual metallocene catalysts for polymerization of bimodal...

2006-02-22

2009-11-17

Lu, Caixia (Department: 1796)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

C526S114000, C526S129000, C526S160000, C526S943000, C502S113000, C502S120000, C502S152000

Reexamination Certificate

active

07619047

ABSTRACT:
This invention relates to catalyst compositions, methods, and polymers encompassing at least one first Group 4 metallocene compound comprising bridging η5-cyclopentadienyl-type ligands, in combination with at least one second Group 4 metallocene with non-bridging η5-cyclopentadienyl-type ligands, typically in combination with at least one cocatalyst, and at least one activator. The compositions and methods disclosed herein provide ethylene polymers with a bimodal molecular weight distribution.

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