Univation Technologies, LLC

Simon Mawson

John Francis Szul

Mark Gregory Goode

David James Schreck

David H McConville

Matthew Gary McKee

Timothy Todd Wenzel

Kersten Anne Terry

Kersten Anne Erickson

Tae Hoon Kwalk

Frederick John Karol

Rex Eugene Murray

Timothy R Lynn

Sun-Chueh Kao

Robert J Jorgensen

Clark Curtis Williams

John Henry Oskam

Robert Harold Vogel

Tae Hoon Kwack

Donald R Loveday

Thomas Henry Peterson

Paul T Daniell

Dick Alan Nagaki

D James Schreck

James D Schreck

Gregory T Whiteker

Jose Fernando Cevallos-Candau

Eric Lucas

Daniel E Wente

John Chirillo, Jr

Dan E Wente

Jose Fernadoi Cevallos-Candau

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.

Catalyst composition, method of polymerization, and polymer therefrom

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

The present invention relates to the use of at least one acid and at least one base and/or at least one reductant and at least one oxidant that when used with a polymerization catalyst in a polymerization process results in the controllable generation of a catalyst inhibitor that renders the polymerization catalyst substantially or completely inactive.

Catalyst modifiers and their use in the polymerization of olefin(s)

The invention provides for polymerization catalyst compositions, and for methods for introducing the catalyst compositions into a polymerization reactor. More particularly, the method combines a catalyst component containing slurry and a catalyst component containing solution to form the completed catalyst composition for introduction into the polymerization reactor. The invention is also directed to methods of preparing the catalyst component slurry, the catalyst component solution and the catalyst compositions, to methods of controlling the properties of polymer products utilizing the catalyst compositions, and to polymers produced therefrom.

Bimodal polyolefin

Polymerization process

This invention relates to a process to polymerize olefin(s) comprising combining a solution, slurry or solid comprising one or more bulky ligand metallocene catalyst compounds, an optional support, and or one or more activator(s) with a solution comprising one or more phenoxide catalyst compounds, and thereafter, introducing one or more olefin(s) and the combination into a polymerization reactor. This invention also relates to a polymer of ethylene wherein the polymer has a density of 0.910 to 0.930 g/cc, a melt index of 0.3 to 2.0 dg/min, and a 15 to 35 &#x3bc;m thick film of the polymer has a 45&#xb0; gloss of 60 or more, a haze of 7% or less, and a dart impact of 600 g or more.

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. The Group 15 containing metal compound is represented in one embodiment by the formulae:

Processes for transitioning among polymerization catalyst systems, preferably catalyst systems, which are incompatible with each other. Particularly, processes for transitioning among olefin polymerization reactions utilizing silyl-chromate catalyst systems and metallocene catalyst systems.

Processes for transitioning between chrome-based and mixed polymerization catalysts

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Charleston, WV, United States of America

Simon Mawson