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:
Aug. 06, 2024
Filed:
Nov. 06, 2019
Applicant:
Asahi Kasei Kabushiki Kaisha, Tokyo, JP;
Inventors:
Assignee:
ASAHI KASEI KABUSHIKI KAISHA, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01J 47/127 (2017.01); C08J 5/22 (2006.01); C25B 1/46 (2006.01); C25B 9/23 (2021.01); C25B 13/02 (2006.01); C25B 13/08 (2006.01);
U.S. Cl.
CPC ...
B01J 47/127 (2017.01); C08J 5/2243 (2013.01); C25B 1/46 (2013.01); C25B 9/23 (2021.01); C25B 13/02 (2013.01); C25B 13/08 (2013.01);
Abstract
A cation-exchange membrane includes layer (I) containing repeating units (A) each represented by formula (1) and repeating units (S) each containing a sulfonic acid-type ion-exchange group, wherein the mass proportion of repeating units (A) based on the total mass proportion of repeating units (A) and repeating units (S) being 100% by mass is 53% by mass or more and 70% by mass or less; and layer (II) containing a fluorine-containing polymer containing a carboxylic acid-type ion-exchange group and disposed on layer (I), wherein the water content of layer (I) is 26% or more and 35% or less:CF—CF (1)