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. 02, 2013
Filed:
Aug. 29, 2007
Shaotian Wang, Mason, OH (US);
Gregory G. Hlatky, Morrow, OH (US);
Sebastian Joseph, Mason, OH (US);
Jean A. Merrick-mack, West Chester, OH (US);
Kenneth J. Klug, Cincinnati, OH (US);
Wallace W. Yau, Pearland, TX (US);
Shaotian Wang, Mason, OH (US);
Gregory G. Hlatky, Morrow, OH (US);
Sebastian Joseph, Mason, OH (US);
Jean A. Merrick-Mack, West Chester, OH (US);
Kenneth J. Klug, Cincinnati, OH (US);
Wallace W. Yau, Pearland, TX (US);
Equistar Chemicals, LP, Houston, TX (US);
Abstract
Resin blends useful for pipe and blow-molded articles are disclosed. The blends comprise a low-molecular-weight, high-density polyethylene and a high-molecular-weight, low-density ethylene copolymer. The high-molecular-weight component is made with a bridged indenoindolyl Group 4 metal complex having open architecture. Blends of the invention uniquely have high molecular weight (M>200,000) and low levels of long-chain branching. A quick, convenient approach for estimating levels of long-chain branching in polyethylenes from gel permeation chromatography and dynamic oscillatory rheometry ('viscosity enhancement factor') is disclosed.