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:
Feb. 04, 2014
Filed:
May. 15, 2009
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;
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;
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.