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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 8642722 B1

PDFFull Text
Date of Patent:
Feb. 04, 2014

Filed:

May. 15, 2009

Preparation method of polybenzimidazole

Applicants:

Chul-ho Jung, Gwangju, KR;

Sang-hoon Han, Seoul, KR;

Jae-eun Lee, Seoul, KR;

Young-moo Lee, Seoul, KR;

Ho-bum Park, Ulsan, KR;

Inventors:

Chul-Ho Jung, Gwangju, KR;

Sang-Hoon Han, Seoul, KR;

Jae-Eun Lee, Seoul, KR;

Young-Moo Lee, Seoul, KR;

Ho-Bum Park, Ulsan, KR;

Assignee:

IUCF-HYU (Industry-University Cooperation Foundation Hanyang University), Seoul, KR;

Attorney:

Lexyoume IP Meister, PLLC.

Primary Examiner:

Melissa Rioja

Int. Cl.
CPC ...
C08G 63/02 (2006.01); C08G 69/26 (2006.01); C08G 69/28 (2006.01); C08G 73/00 (2006.01); C08G 64/00 (2006.01); C08G 73/06 (2006.01); C08C 1/14 (2006.01);
U.S. Cl.
CPC ...
Abstract

Disclosed is a method of preparing porous polybenzimidazole. The method includes providing polyaminoimide by reacting aromatic amine including at least two ortho-positioned amino groups and acid dianhydride, obtaining polypyrrolone from the polyaminoimide, subjecting the polypyrrolone to alkaline treatment, and subjecting the alkaline-treated polypyrrolone to heat treatment. The polybenzimidazole shows permeability and selectivity for various gases due to a fractional free volume and well-connected picopores.

Find Patent Forward Citations

Jung, Chul-Ho. (2014). Preparation method of polybenzimidazole (U.S. Patent No. 8642722). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/8642722

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