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:
Nov. 27, 2012
Filed:
Dec. 17, 2008
Bruce J. Savatsky, Kingwood, TX (US);
John H. Oskam, Flemington, NJ (US);
Mark W. Blood, Hurricane, WV (US);
Mark B. Davis, Lake Jackson, TX (US);
Douglas H. Jackson, Flatwoods, KY (US);
Timothy R. Lynn, Glen Gardner, NJ (US);
Daniel P. Zilker, Jr., Charleston, WV (US);
Bruce J. Savatsky, Kingwood, TX (US);
John H. Oskam, Flemington, NJ (US);
Mark W. Blood, Hurricane, WV (US);
Mark B. Davis, Lake Jackson, TX (US);
Douglas H. Jackson, Flatwoods, KY (US);
Timothy R. Lynn, Glen Gardner, NJ (US);
Daniel P. Zilker, Jr., Charleston, WV (US);
Univation Technologies, LLC, Houston, TX (US);
Abstract
A method of performing a polymerization reaction in a gas phase polymerization reactor to produce a bimodal polymer while controlling activity of a bimodal polymerization catalyst composition in the reactor by controlling concentration of at least one induced condensing agent ('ICA') in the reactor is provided. In some embodiments, the ICA is isopentane (or another hydrocarbon compound) and the bimodal catalyst composition includes a Group 15 and metal containing catalyst compound (or other HMW catalyst for catalyzing polymerization of a high molecular weight fraction of the product), and a metallocene catalyst compound (or other LMW catalyst for catalyzing polymerization of a low molecular weight fraction of the product).