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:
Jun. 22, 2010
Filed:
Dec. 20, 2005
Takashi Yamashita, Tsukuba, JP;
Shinji Nakai, Tsukuba, JP;
Hiroyuki Ogi, Tsukuba, JP;
Tomohiro Ono, Tsukuba, JP;
Masahiro Rikukawa, Chiyoda-ku, JP;
Takashi Yamashita, Tsukuba, JP;
Shinji Nakai, Tsukuba, JP;
Hiroyuki Ogi, Tsukuba, JP;
Tomohiro Ono, Tsukuba, JP;
Masahiro Rikukawa, Chiyoda-ku, JP;
Kuraray Co., Ltd., Kurashiki-shi, JP;
Abstract
This invention relates to an ion-conducting binder used for a membrane electrode assembly for polymer electrolyte fuel cells, the assembly consisting of a polymer electrolyte membrane and two gas diffusion electrodes stuck to the polymer electrolyte membrane with the membrane put between the electrodes, which binder comprises a block copolymer which comprises a polymer block (A) having as a main unit an aromatic vinyl compound unit whose α-carbon is quaternary carbon, and a flexible polymer block (B), and has ion-conducting groups on the polymer block (A), and a solution or suspension thereof, and a membrane electrode assembly and a polymer electrolyte fuel cell. The ion-conducting binder, membrane electrode assembly and polymer electrolyte fuel cell of this invention are economical, mild to the environment and excellent in moldability and oxidation stability.