Univation Technologies, LLC

Tae Hoon Kwack

Frederick John Karol

John Francis Szul

David James Schreck

Simon Mawson

Kersten Anne Erickson

David H McConville

Donald R Loveday

Rex Eugene Murray

The present invention is directed to a bimodal polyethylene comprising ethylene derived units and units derived from at least one of a Cto Colefin; wherein the polyethylene has a density of from 0.940 to 0.970 g/cm; an I/Iof 80 or more; a residual Group 4 metal content of 2.0 ppm or less: a Mw/Mn of from 20 to 60; and wherein the polyethylene comprises a high molecular weight component and a low molecular weight component, the high molecular weight component present from 40 to 60 weight percent based on the total polyethylene, and wherein the bimodal polyethylene has a weight avenge molecular weight Mw of 180,000 a.m.u. or more.

Bimodal high density polyethlyene

Catalyst compositions and methods useful in polymerization processes utilizing at least two metal compounds are disclosed. At least one of the metal compounds is a Group 15 containing metal compound and the other metal compound is preferably a bulky ligand metallocene-type catalyst. The invention also discloses a new polyolefin, generally polyethylene, particularly a multimodal polymer and more specifically, a bimodal polymer, and its use in various end-use applications such as film, molding and pipe. The Group 15 containing metal compound is represented in one embodiment by the formulae:

Catalyst composition, method of polymerization, and polymer therefrom

Catalyst compositions and methods, useful in polymerization processes, utilizing at least two metal compounds are disclosed. At least one of the metal compounds is a Group 15 containing metal compound and the other metal compound is preferably a bulky ligand metallocene-type catalyst. The invention also discloses a new polyolefin, generally polyethylene, particularly a multimodal polymer and more specifically, a bimodal polymer, and its use in various end-use applications such as film, molding and pipe.

This invention relates to a process to polymerize olefins comprising reacting olefins with a catalyst system comprising an activator, a metallocene and a second metal compound based on bidentate ligands containing heterocycle moieties.

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Belle Mead, NJ, United States of America

Tae Hoon Kwack