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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.:

US 11414526 B1

PDFFull Text
Date of Patent:
Aug. 16, 2022

Filed:

Jun. 25, 2015

High melt strength polypropylene and extrusion process for preserving melt strength

Applicants:

Exxonmobil Chemical Patents Inc., Baytown, TX (US);

Basf SE, Ludwigshafen, DE;

Inventors:

George J. Pehlert, Houston, TX (US);

Mosha H. Zhao, Houston, TX (US);

Roswell E. King, Pleasantville, NY (US);

Assignee:

EXXONMOBIL CHEMICAL PATENTS INC., Baytown, TX (US);

Attorney:

Lowenstein Sandler LLP

Primary Examiner:

Angela C Scott

Int. Cl.
CPC ...
C08J 3/20 (2006.01); C08L 23/10 (2006.01); C08K 5/00 (2006.01); C08L 23/02 (2006.01); C08K 5/526 (2006.01); C08K 5/134 (2006.01); B29C 48/92 (2019.01); B29C 48/76 (2019.01); B29C 48/875 (2019.01); C08L 23/12 (2006.01); B29B 7/00 (2006.01); B29B 7/48 (2006.01); B29B 7/72 (2006.01); B29B 7/82 (2006.01); B29B 13/10 (2006.01); C08K 5/1545 (2006.01); C08K 5/52 (2006.01); B29C 48/69 (2019.01);
U.S. Cl.
CPC ...
C08J 3/203 (2013.01); B29B 7/002 (2013.01); B29B 7/489 (2013.01); B29B 7/726 (2013.01); B29B 7/823 (2013.01); B29B 13/10 (2013.01); B29C 48/76 (2019.02); B29C 48/875 (2019.02); B29C 48/92 (2019.02); C08K 5/005 (2013.01); C08K 5/134 (2013.01); C08K 5/1545 (2013.01); C08K 5/52 (2013.01); C08K 5/526 (2013.01); C08L 23/02 (2013.01); C08L 23/10 (2013.01); C08L 23/12 (2013.01); B29C 48/69 (2019.02); B29C 2948/92704 (2019.02); C08J 2323/12 (2013.01);
Abstract

A method of melt blending a polypropylene and the melt blended polypropylene therefrom, comprising providing a base-polypropylene having a MFR of less than 15 g/10 min and a molecular weight distribution (Mw/Mn) within the range from 5 to 16, and comprising hindered phenol and phosphorous-type antioxidants, and within the range from 5 ppm to 4000 ppm of an alkyl radical scavenger relative to the total weight of the components to form a melt blended polypropylene; melt blending the melt blended polypropylene at a temperature of at least 210° C.; and isolating a melt blended, melt blended polypropylene.

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