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:
Feb. 13, 1990
Filed:
Mar. 28, 1988
Applicant:
Inventors:
Yasuhiro Kurauchi, Shin-nanyo, JP;
Toru Seita, Shin-nanyo, JP;
Kiyohide Matsui, Sagamihara, JP;
Kikuo Sugimoto, Kanagawa, JP;
Assignee:
Tosoh Corporation, Shin-nanyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B01D / ; C08D / ; C08F / ;
U.S. Cl.
CPC ...
204296 ; 204301 ; 521 27 ; 521 32 ; 526248 ;
Abstract
A process for preparing an anion exchange membrane, which comprises subjecting a carboxylate membrane made of a copolymer having repeating units of the formula: ##STR1## wherein X is F or CF.sub.3, l is an integer of from 0 to 5, m is 0 or 1, n is an integer of from 1 to 5, and p/q is from 4 to 16, and R is an alkyl group, to an acid or base treatment, and then introducing anion exchange groups thereinto.