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. 09, 2007
Filed:
May. 31, 2002
Takuya Hasegawa, Yokohama, JP;
Yuichi Inoue, Yokohama, JP;
Takuya Hasegawa, Yokohama, JP;
Yuichi Inoue, Yokohama, JP;
Asahi Kasei Kabushiki Kaisha, Osaka, JP;
Abstract
An ion exchange fluorocarbon resin membrane having a storage modulus (JIS K-7244), when substituted with tributyl ammonium ions, at a temperature of not less than Tc represented by the following general equations (1-1) to (1-3) of 0.8×10Pa or more, and a heat of crystal fusion at 270 to 350° C. of 1 J/g or less:(° C.)=55+(750)  (1-1)(° C.)=0.444×278+(750≦930)  (1-2)(° C.)=135+(930)  (1-3)where Tg designates the peak temperature of loss tangent in the dynamic viscoelasticity measure-ment of the ion exchange fluorocarbon resin membrane (having SOH as the ends of the side chains).