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. 06, 2009
Filed:
Sep. 02, 2005
Venki Chandrashekar, Houston, TX (US);
Mark P. Mack, West Chester, OH (US);
Charles H. Gates, Jr., Lake Jackson, TX (US);
Charles S. Holland, Coal City, IL (US);
Natalia Nagy, Naperville, IL (US);
Sandor M. Nagy, Naperville, IL (US);
Edward S. Vargas, Loveland, OH (US);
Jean A. Merrick-mack, West Chester, OH (US);
Venki Chandrashekar, Houston, TX (US);
Mark P. Mack, West Chester, OH (US);
Charles H. Gates, Jr., Lake Jackson, TX (US);
Charles S. Holland, Coal City, IL (US);
Natalia Nagy, Naperville, IL (US);
Sandor M. Nagy, Naperville, IL (US);
Edward S. Vargas, Loveland, OH (US);
Jean A. Merrick-Mack, West Chester, OH (US);
Equistar Chemicals, LP, Houston, TX (US);
Abstract
Disclosed is a polyethylene composition. The composition comprises single-site multimodal resin A and single-site multimodal resin B, wherein resin A differs from resin B in molecular weight, in monomeric composition, in density, in long chain branch concentration or distribution, or in combinations thereof. Disclosed is also a method for making the polyethylene composition. The method comprises polymerizing, in the presence of two or more single-site catalysts, ethylene or its mixture with a C-Cα-olefin to form a first multimodal resin and continuing the polymerization in the presence of the same catalysts but in a different hydrogen concentration, in a different monomer composition, or at a different temperature to form a second multimodal resin.