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:
Apr. 24, 2007
Filed:
Nov. 23, 2004
Elizabeth A. Benham, Bartlesville, OK (US);
Paul J. Deslauriers, Bartlesville, OK (US);
Max P. Mcdaniel, Bartlesville, OK (US);
AL R. Wolfe, Bartlesville, OK (US);
Elizabeth A. Benham, Bartlesville, OK (US);
Paul J. DesLauriers, Bartlesville, OK (US);
Max P. McDaniel, Bartlesville, OK (US);
Al R. Wolfe, Bartlesville, OK (US);
Chevron Philips Chemical Company LP, The Woodlands, TX (US);
Abstract
A copolymer of ethylene and a higher alpha olefin, preferably 1-hexene, can be produced using an activated chromium containing catalyst system and a cocatalyst selected from the group consisting of trialkylboron, trialkylsiloxyalutninum, and a combination of trialkylboron and thalkylaluminum compounds. The polymerization process must be carefully controlled to produce a copolymer resin having an exceptionally broad molecular weight distribution, extremely high PENT ESCR values, and a natural branch profile that impacts branching preferably into the high molecular weight portion of the polymer. The resulting copolymer resin is especially useful in high stiffness pipe applications.