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:
Oct. 06, 2015
Filed:
Oct. 02, 2013
Applicant:
Equistar Chemicals, Lp, Houston, TX (US);
Inventors:
Chun Lee, Cincinnati, OH (US);
Dinshong Dong, Hockessin, DE;
Charles S. Holland, Springboro, OH (US);
James R. Beren, West Chester, PA (US);
Assignee:
Equistar Chemicals, LP, Houston, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08K 5/00 (2006.01); C08K 5/34 (2006.01); C08L 23/12 (2006.01); C08L 23/10 (2006.01); C08K 5/526 (2006.01);
U.S. Cl.
CPC ...
C08L 23/12 (2013.01); C08L 23/10 (2013.01); C08K 5/005 (2013.01); C08K 5/526 (2013.01); C08L 2207/02 (2013.01);
Abstract
A process of extruding a blend of an irradiated first propylene polymer and a non-irradiated second propylene polymer, where the first propylene polymer comprises a non-phenolic stabilizer. The irradiation of the first propylene polymer extrudate is conducted in a reduced oxygen environment, and the irradiated first propylene polymer and the non-irradiated second propylene polymer are blended at a temperature below their respective melting points. The blend has a viscosity retention of 20 to 35%.