Dual metallocene catalyst for producing film resins with...

Details Dual metallocene catalyst for producing film resins with... Dual metallocene catalyst for producing film resins with...

2006-10-10

2006-10-10

Wu, David W. (Department: 1713)

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

C526S114000, C526S118000, C526S119000, C526S160000, C526S170000, C526S943000, C526S941000, C526S352000, C526S348500, C526S348600, C526S348200, C526S348000, C526S126000, C526S127000, C502S130000, C502S129000, C502S156000, C502S118000, C502S103000, C502S231000

Reexamination Certificate

active

07119153

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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PCT International Search Report, PCT/US05/002100, May 13, 2005.

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