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:
Jul. 03, 2012
Filed:
Sep. 24, 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 which is represented by the following formula (1) and at least one segment substantially free from acid groups which comprises repeating units represented by the following formula (2) is provided: (wherein, m represents an integer of 10 or more, Ar, Arand Arrepresent each independently a divalent aromatic group which is optionally substituted by an alkyl group having 1 to 10 carbon atoms, alkoxy group having 1 to 10 carbon atoms, aryl group having 6 to 10 carbon atoms or aryloxy group having 6 to 10 carbon atoms, at least one of Arand Arhaving an acid group, and Armay have an acid group or may be free from acid groups. Y represents —CO— or —SO—, and Y's may be different from each other.) (wherein, n represents an integer of 10 or more, Arand Arrepresent each independently a divalent aromatic group which is optionally substituted by an alkyl group having 1 to 10 carbon atoms, alkoxy group having 1 to 10 carbon atoms, aryl group having 6 to 10 carbon atoms, aryloxy group having 6 to 10 carbon atoms or flouro group. Z represents —CO— or —SO—, and Z's may be different from each other). The block copolymer exerts more excellent performances as the polymer electrolyte in fuel cells and the like.