Ion exchange membrane and method for manufacturing the same

Patent metadata

Field	Value
Publication number	US-9790338-B2
Application number	US-201615248541-A
Country	US
Kind code	B2
Filing date	Aug 26, 2016
Priority date	Feb 28, 2014
Publication date	Oct 17, 2017
Grant date	Oct 17, 2017

Abstract

An ion exchange membrane obtained by using an ionic monomer having at least two or more polymerizable functional groups, in which a hydrophobicity index H obtained by an expression below from a monomer for forming an ion exchange resin and a material fixed to the resin in the ion exchange membrane is 1.6 or greater, and a manufacturing method therefor. Hydrophobicity index H=Σ{(log P of each component)×(molar ratio of each material in resin)}.

First claim

What is claimed is:

1. An ion exchange membrane obtained by using an ionic monomer having at least two or more polymerizable functional groups,
wherein a hydrophobicity index H obtained by an expression below from a monomer for forming an ion exchange resin in the ion exchange membrane and a material fixed to the resin is 1.6 or greater;
Hydrophobicity index H =EΣ{(log P of each component)×(molar ratio of each material in resin)}.

2. The ion exchange membrane according to claim 1 ,
wherein the ionic monomer includes quaternary ammonium.

3. The ion exchange membrane according to claim 1 ,
wherein the ionic monomer includes a sulfonic acid group or a salt thereof.

4. The ion exchange membrane according to claim 1 ,
wherein the ionic monomer includes an alkylamide group as the polymerizable functional group.

5. The ion exchange membrane according to claim 1 ,
wherein the ionic monomer includes a styrene structure as the polymerizable functional group.

6. The ion exchange membrane according to claim 1 obtained by optically polymerizing and curing the ionic monomer.

7. The ion exchange membrane according to claim 1 obtained by thermally polymerizing and curing the ionic monomer.

8. The ion exchange membrane according to claim 1 , obtained by polymerizing and curing a composition,
wherein a moisture content of the composition including the ionic monomer is 35 mass % or less.

9. A method for manufacturing an ion exchange membrane, by using an ionic monomer having at least two or more polymerizable functional groups, comprising:
polymerizing and curing a monomer for forming an ion exchange resin in the ion exchange membrane and a material fixed to the resin such that a hydrophobicity index H obtained by an expression below is 1.6 or greater;
Hydrophobicity index H =ΣE{(log P of each component)×(molar ratio of each material in resin)}.

10. The method for manufacturing an ion exchange membrane according to claim 9 , comprising:
optically polymerizing and curing the ionic monomer.

11. The method for manufacturing an ion exchange membrane according to claim 9 , comprising:
thermally polymerizing and curing the ionic monomer.

12. The method for manufacturing an ion exchange membrane according to claim 9 , comprising:
polymerizing and curing a composition,
wherein a moisture content of the composition including the ionic monomer is 35 mass % or less.

Assignees

• Fujifilm Corp

Inventors

• Kaminaga Kuniyuki
• Takamoto Tetsufumi
• Kodama Keisuke
• Inoue Kazuomi

Classifications

• C08J2333/24

  Homopolymers or copolymers of amides or imides · CPC title

• B01D61/48

  having one or more compartments filled with ion-exchange material {, e.g. electrodeionisation} · CPC title

• C08J5/2231

  based on macromolecular compounds obtained by reactions involving unsaturated carbon-to-carbon bonds · CPC title

• C08J2325/18

  Homopolymers or copolymers of aromatic monomers containing elements other than carbon and hydrogen · CPC title

• C08J5/2243 Primary

  obtained by introduction of active groups capable of ion-exchange into compounds of the type C08J5/2231 · CPC title