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:
May. 31, 2011
Filed:
Dec. 04, 2009
Sameer D. Mehta, Mason, OH (US);
Harilaos Mavridis, Lebanon, OH (US);
Jeffrey C. Haley, Cincinnati, OH (US);
Philip J. Garrison, Houston, TX (US);
Jeffrey S. Borke, Middletown, OH (US);
Sameer D. Mehta, Mason, OH (US);
Harilaos Mavridis, Lebanon, OH (US);
Jeffrey C. Haley, Cincinnati, OH (US);
Philip J. Garrison, Houston, TX (US);
Jeffrey S. Borke, Middletown, OH (US);
Equistar Chemicals, LP, Houston, TX (US);
Abstract
Disclosed is a multimodal, high density, homopolyethylene barrier resin. The resin is preferably made by a multistage process. The process comprises a first stage in which ethylene is homopolymerized in the presence of a Ziegler-Natta catalyst, organoaluminum cocatalyst, alkoxysilane modifier, and hydrogen. The reaction mixture from the first stage is devolatilized to remove all or substantially all of the hydrogen. The polymerization continues in a second stage wherein ethylene is added to the devolatilized reaction mixture to produce the barrier resin. The barrier resin provides films with improved barrier properties.