公开(公告)号：US20240399319A1

公开(公告)日：2024-12-05

申请号：US18687624

申请日：2022-08-24

Applicant: ASTOM Corporation ,  TOKUYAMA CORPORATION

Inventor： Kazuo MIZUGUCHI ,  Nobuhiko OHMURA ,  Masayuki KISHINO ,  Michihito NAKATANI

IPC: B01D71/60

Abstract: The present invention provides an anion exchange membrane that has low electrical resistance when used in electrodialysis, is produced without an increase in cost, and is excellent in selective permeability to monovalent anions, and a method for producing the same. The anion exchange membrane has a tertiary amino group and a quaternary ammonium group as functional groups, such that an intensity ratio of the tertiary amino group to the quaternary ammonium group is 1.0 or more as measured by X-ray photoelectron spectroscopy on a surface of the anion exchange membrane having the tertiary amino group and the quaternary ammonium group as the functional groups.

公开(公告)号：US20170216832A1

公开(公告)日：2017-08-03

申请号：US15328673

申请日：2015-07-16

Applicant: ASTOM CORPORATION

Inventor： Tomoaki TAKAHASHI ,  Hiroshi MIYAZAWA ,  Nobuyuki TANAKA ,  Nobuhiko OHMURA ,  Kazuo MIZUGUCHI ,  Kenji FUKUTA

IPC: B01J39/20 ,  B01J41/07 ,  B01J41/14 ,  B01J47/12 ,  C08J5/22 ,  B01D71/26 ,  B32B27/08 ,  B32B27/32 ,  B32B38/00 ,  B01D67/00 ,  B01D69/12 ,  B01D69/02 ,  B01J39/05 ,  B32B3/26

Abstract: An ion exchange membrane having a structure that an ion exchange resin is filled in spaces of a porous base film, the porous base film has a structure that at least two porous olefin resin layers are laminated with a bonding strength of 100 gf/cm or more to less than 700 gf/cm and a Gurley air permeance of 500 sec/100 ml or less in terms of a 100 μm thick film. In this ion exchange membrane, base film has high air permeability though it has a multi-layer structure that a plurality of porous resin films are bonded together, and therefore a rise in electric resistance caused by the lamination of the base sheets is effectively suppressed.