Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Plural component system comprising a - group i to iv metal...
Reexamination Certificate
2006-05-09
2006-05-09
Wu, David W. (Department: 1713)
Catalyst, solid sorbent, or support therefor: product or process
Catalyst or precursor therefor
Plural component system comprising a - group i to iv metal...
C502S119000, C502S227000, C502S231000, C526S119000, C526S118000, C526S116000
Reexamination Certificate
active
07041617
ABSTRACT:
This invention relates to the field of olefin polymerization catalyst compositions, and methods for the polymerization and copolymerization of olefins, including polymerization methods using a supported catalyst composition. In one aspect, the present invention encompasses a catalyst composition comprising the contact product of a first metallocene compound, a second metallocene compound, at least one chemically-treated solid oxide, and at least one organoaluminum compound. The new resins were characterized by useful properties in impact, tear, adhesion, sealing, extruder motor loads and pressures at comparable melt index values, and neck-in and draw-down.
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Anneli Malmberg, et al., “Long-Chain Branched Polyethene Polymerized by metallocene Catalysts . . . ” Macromolecules vol. 31, No. 24, Dec. 1, 1998, pp. 8448-8454.
Benham Elizabeth A.
Jensen Michael D.
Jerdee Gary
Martin Joel L.
McDaniel Max P.
Chevron Phillips Chemical Company, L.P.
Lee Rip A.
Womble Carlyle Sandridge & Rice PLLC
Wu David W.
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