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:
Jan. 31, 2012
Filed:
Sep. 20, 2007
Naoya Hayamizu, Kanagawa-ken, JP;
Yukihiro Shibata, Fukuoka-ken, JP;
Akiko Saito, Kanagawa-ken, JP;
Jun Momma, Kanagawa-ken, JP;
Hideo Oota, Tokyo, JP;
Naoya Hayamizu, Kanagawa-ken, JP;
Yukihiro Shibata, Fukuoka-ken, JP;
Akiko Saito, Kanagawa-ken, JP;
Jun Momma, Kanagawa-ken, JP;
Hideo Oota, Tokyo, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
A polyelectrolyte material includes as a main chain: a benzene ring; an ether; and a carbonyl group. A part of the benzene ring is sulfonated. A method for manufacturing a polyelectrolyte material includes: synthesizing disulfonyl difluorobenzophenone; and polymerizing the disulfonyl difluorobenzophenone, 4,4'-difluorobenzophenone, and phenolphthalein with a crown ether as a catalyst. The synthesizing is performed by reacting 4,4′-difluorobenzophenone with fuming sulfuric acid, performing salting-out the reaction product, and recrystallizing the salting-out product.