The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 26, 2001
Filed:
Dec. 30, 1998
Kersten Anne Erickson, South Charleston, WV (US);
Lewis Joe Fouts, Jr., Poca, WV (US);
Union Carbide Chemicals & Plastics Technology Corporation, Danbury, CT (US);
Abstract
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.