Polymerization catalysts for producing high molecular weight...

Details Polymerization catalysts for producing high molecular weight... Polymerization catalysts for producing high molecular weight...

2009-11-18

2010-06-08

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...

C526S129000, C526S133000, C526S943000, C502S103000, C502S120000, C502S152000

Reexamination Certificate

active

07732542

ABSTRACT:
This invention relates to catalyst compositions, methods, and polymers encompassing at least one Group 4 metallocene compound comprising 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 low levels of long chain branching.

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