Dow Global Technolgoies LLC

Union Carbide Chemicals & Plastics Technology Corporation

Lewis J Fouts, Jr

Paul C Vosejpka

Jan Willem Van Egmond

Roger B Painter

Joseph N Coalter, Iii

Kersten Anne Erickson

A supported catalyst composition and process for preparing high molecular weight polymers of one or more addition polymerizable monomers, especially propylene, said composition comprising:

Supported catalysts for manufacture of polymers

A supported catalyst composition and process for preparing high molecular weight polymers of one or more addition polymerizable monomers, especially propylene, said composition comprising: 1) a substrate comprising the reaction product of a solid, particulated, high surface area, metal oxide, metalloid oxide, or a mixture thereof and an organoaluminum compound, 2) a Group 4 metal complex of a polyvalent, Lewis base ligand; and optionally, 3) an activating cocatalyst for the metal complex.

Preactivated unsupported catalysts are prepared by contacting an unsupported olefin polymerization catalyst precursor with an activator, or co-catalyst in a suitable reaction medium and then contacting the mixture with additional solvent to form a preactivated unsupported olefin polymerization catalyst composition. The preactivated unsupported olefin polymerization catalyst composition is useful in a method of polymerizing an olefin monomer by adding it, in solution or slurry, to a gas phase polymerization reactor together with one or more olefins to form a polymer, copolymer, terpolymer, or the like. The use of the preactivated unsupported olefin polymerizaiton catalysts compositions does not plug the catalyst injection nozzle or feed tube when feeding the solution to the gas phase reactor.

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Poca, WV, United States of America

Lewis J Fouts, Jr