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. 01, 2007
Filed:
Feb. 02, 2004
Toshihiro Otsuki, Tokyo, JP;
Nagayuki Kanaoka, Wako, JP;
Masaru Iguchi, Wako, JP;
Naoki Mitsuta, Wako, JP;
Hiroshi Soma, Wako, JP;
Toshihiro Otsuki, Tokyo, JP;
Nagayuki Kanaoka, Wako, JP;
Masaru Iguchi, Wako, JP;
Naoki Mitsuta, Wako, JP;
Hiroshi Soma, Wako, JP;
Honda Motor Co., Ltd., Tokyo, JP;
JSR Corporation, Tokyo, JP;
Abstract
Disclosed are a polymer electrolyte having improved hot water resistance and radical resistance, a proton conductive membrane comprising the polymer electrolyte, and a membrane-electrode assembly including the proton conductive membrane. The polymer electrolyte comprises at least one polymer selected from polyether, polyketone, polyetherketone, polysulfone, polyethersulfone, polyimide, polyetherimide, polybenzimidazole, polybenzothiazole, polybenzoxazole and the like. The polymer comprises a repeating structural unit with either or both of an aromatic ring and a heterocyclic ring, and a repeating structural unit represented by the formula (1): wherein X is a single bond, an electron-withdrawing group or an electron-donating group; R is a single bond, —(CH)— or —(CF)— where q ranges from 1 to 10; m is from 0 to 10; k is from 0 to 5; l is from 0 to 4; and k+1≧1.