Ethylene homopolymers or copolymers having good machine...

Details Ethylene homopolymers or copolymers having good machine... Ethylene homopolymers or copolymers having good machine...

2006-06-05

2009-08-11

Wu, David (Department: 1796)

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

C526S352000, C528S396000

Reexamination Certificate

active

07572875

ABSTRACT:
This invention relates to catalyst compositions comprising a first metallocene compound, a second metallocene compound, at least one chemically-treated solid oxide, and at least one organoaluminum compound. This invention also relates to methods to prepare and use the catalyst compositions and new polyolefins. The compositions and methods disclosed herein provide ethylene polymers and copolymers with lower MI, increased melt strength, and good MD tear properties.

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