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:
Sep. 28, 2010
Filed:
Oct. 15, 2004
Toru Onodera, Tsukuba, JP;
Shigeru Sasaki, Tsukuba, JP;
Daizaburo Yashiki, Tsukuba, JP;
Sumitomo Chemical Company, Limited, Tokyo, JP;
Abstract
A block copolymer comprising at least one segment having an acid group and at least one segment substantially free from acid groups is provided wherein the segment substantially free from acid groups contains a structure of the following general formula (1):Ar—Z—Ar—O—Ar—O  (1)(wherein, m represents an integer of 10 or more, Ar, Arand Arrepresent mutually independently a divalent aromatic group which may be substituted by an alkyl group having 1 to 10 carbon atoms, an alkoxy group having 1 to 10 carbon atoms, an aryl group having 6 to 10 carbon atoms or an aryloxy group having 6 to 10 carbon atoms, and Z represents —CO— or —SO—, each Z in the segments representing independently —CO— or —SO—). The block copolymer exhibits more excellent performances as a polymer electrolyte for fuel cells or the like.