Ion exchange membrane, method for producing same, and electrodialyzer
US10125036B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jun 23, 2015 |
| Grant date | Nov 13, 2018 |
| Priority date | — |
| Expiry date | May 15, 2037 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2329/04
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Provided is an ion exchange membrane including an ionic vinyl alcohol polymer having a cation exchange group or an anion exchange group. The ion exchange membrane 1 includes a porous support 3 and the ionic vinyl alcohol polymer. The porous support is provided, in a thickness direction from one surface thereof, with an impregnated layer 2 at least a part of which is impregnated with the ionic vinyl alcohol polymer. The ionic vinyl alcohol polymer includes an ionic vinyl alcohol polymer having an ion exchange group selected from a cation exchange group or an anion exchange group. The ion exchange membrane has a zeta potential value (ζ1) at one surface and a zeta potential value (ζ2) at the other surface, which are represented by the formula (1). (|ζ1|)−|ζ2|)/|ζ1|<0.5 (|ζ1|)≥|ζ2|) (1)
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.