公开(公告)号：US11447881B2

公开(公告)日：2022-09-20

申请号：US15491272

申请日：2017-04-19

Applicant: AGC Inc.

Inventor： Yasushi Yamaki ,  Takayuki Kaneko ,  Hiromitsu Kusano ,  Takuo Nishio ,  Kazuo Umemura

IPC: C25B1/46 ,  C25B13/08 ,  B01D69/10 ,  C25B9/23 ,  B01D71/32 ,  C08J5/22 ,  B01D71/82

Abstract: To provide an ion exchange membrane for alkali chloride electrolysis for which membrane strength is increased while membrane resistance is reduced to reduce electrolysis voltage during alkali chloride electrolysis and which prevents peeling between layers (S) and a layer (C). The ion exchange membrane for alkali chloride electrolysis comprises a layer (C) which comprises a fluorinated polymer having carboxylic acid functional groups, at least two layers (S) which comprise a fluorinated polymer having sulfonic acid functional groups, and a reinforcing material, wherein the layers (S) include a layer (Sa) and a layer (Sb), the layer (Sa) is a layer which is adjacent to the layer (C), the layer (Sb) is a layer which is not adjacent to the layer (C), the reinforcing material is disposed in the layer (Sb) substantially in parallel to the layer (Sb) in a state not in contact with the layer (Sa), and the ion exchange capacity of the layer (Sa) is lower than the ion exchange capacity of the layer (Sb).