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:
Jul. 21, 2009
Filed:
Aug. 11, 2005
Kevin J Cann, Rocky Hill, NJ (US);
Minghui Zhang, Hillsborough, NJ (US);
Jose Fernando Cevallos-candau, Charleston, WV (US);
John Moorhouse, Kendall Park, NJ (US);
Mark Gregory Goode, Hurricane, WV (US);
Daniel Paul Zilker, Jr., Charleston, WV (US);
Maria Apecetche, Piscataway, NJ (US);
Kevin J Cann, Rocky Hill, NJ (US);
Minghui Zhang, Hillsborough, NJ (US);
Jose Fernando Cevallos-Candau, Charleston, WV (US);
John Moorhouse, Kendall Park, NJ (US);
Mark Gregory Goode, Hurricane, WV (US);
Daniel Paul Zilker, Jr., Charleston, WV (US);
Maria Apecetche, Piscataway, NJ (US);
Univation Technologies, LLC, Houston, TX (US);
Abstract
The present invention is directed to the use of aluminum alkyl activators and co-catalysts to improve the performance of chromium-based catalysts. The aluminum alkyls allow for the variable control of polymer molecular weight, control of side branching while possessing desirable productivities, and may be applied to the catalyst directly or separately to the reactor. Adding the alkyl aluminum compound directly to the reactor (in-situ) eliminates induction times.