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:
Jan. 25, 2011
Filed:
Jun. 25, 2007
Blair Alfred Graham, Bright's Grove, CA;
Mark P. Ossowski, Bridgewater, NJ (US);
James M. Farley, League City, TX (US);
Rainer Kolb, Kingwood, TX (US);
Blair Alfred Graham, Bright's Grove, CA;
Mark P. Ossowski, Bridgewater, NJ (US);
James M. Farley, League City, TX (US);
Rainer Kolb, Kingwood, TX (US);
Univation Technologies, LLC, Houston, TX (US);
Abstract
A process for the production of an ethylene alpha-olefin copolymer is disclosed. The process includes polymerizing ethylene and at least one alpha-olefin by contacting the ethylene and the at least one alpha-olefin with a metallocene catalyst in at least one gas phase reactor at a reactor pressure of from 0.7 to 70 bar and a reactor temperature of from 20° C. to 150° C. to form an ethylene alpha-olefin copolymer. The resulting ethylene alpha-olefin copolymer may have a density of 0.927 g/cc or greater and environmental stress crack resistance (ESCR) of 500 hr or more when measured according to ASTM 1693/B in 10% Igepal.