Curable compositions and membranes

Patent metadata

Field	Value
Publication number	US-9487418-B2
Application number	US-201514979740-A
Country	US
Kind code	B2
Filing date	Dec 28, 2015
Priority date	Dec 16, 2009
Publication date	Nov 8, 2016
Grant date	Nov 8, 2016

Abstract

A curable composition comprising:
(i) 2.5 to 50 wt % crosslinker comprising at least two acrylamide groups; (ii) 20 to 65 wt % curable ionic compound comprising an ethylenically unsaturated group and an anionic group; (iii) 15 to 45 wt % solvent; and (iv) 0 to 10 wt % of free radical initiator; wherein the molar ratio of (i):(ii) is 0.1 to 1.5.

The compositions are useful for preparing ion exchange membranes.

First claim

The invention claimed is:

1. A device selected from the group consisting of an electrodialysis or reverse electrodialysis unit, an electrodeionization module and a flow through capacitor, the device comprising a membrane obtained by a process comprising the following steps:
applying a curable composition to a support; and
curing the composition to form a membrane;
wherein the curable composition comprises:
(i) 2.5 to 50 wt % crosslinker comprising at least two acrylamide groups;
(ii) 20 to 65 wt % curable ionic compound comprising an ethylenically unsaturated group and an anionic group;
(iii) 15 to 45 wt % solvent; and
(iv) 0 to 10 wt % of free radical initiator;
wherein the molar ratio of (i):(ii) is 0.1 to 1.5.

2. The device according to claim 1 wherein the device is an electrodialysis or reverse electrodialysis unit.

3. The device according to claim 2 which further comprises at least one anode and at least one cathode.

4. The device according to claim 3 which further comprises an inlet for providing a flow of relatively salty water along a first side of the membrane and an inlet for providing a less salty flow water along a second side of the membrane such that ions pass from the first side to the second side of the membrane.

5. The device according to claim 1 wherein the device is a flow through capacitor.

6. The device according to claim 5 which further comprises at least one anode and at least one cathode.

7. The device according to claim 1 wherein the device is an electrodeionization module.

8. The device according to claim 7 which further comprises at least one anode and at least one cathode.

9. The device according to claim 1 wherein the curable composition comprises 7.47 to 43.33 wt % crosslinker comprising at least two acrylamide groups.

10. The device according to claim 1 wherein the curable composition comprises:
(i) 8 to 16 wt % crosslinker comprising at least two acrylamide groups;
(ii) 40 to 60 wt % curable ionic compound comprising an ethylenically unsaturated group and an anionic group;
(iii) 22 to 40 wt % solvent; and
(iv) 0.01 to 2 wt % of photoinitiator;
wherein the molar ratio of (i):(ii) is 0.1 to 1.0.

11. The device according to claim 10 wherein the device is an electrodialysis or reverse electrodialysis unit.

12. The device according to claim 11 which further comprises at least one anode and at least one cathode.

13. The device according to claim 12 which further comprises an inlet for providing a flow of relatively salty water along a first side of the membrane and an inlet for providing a less salty flow water along a second side of the membrane such that ions pass from the first side to the second side of the membrane.

14. The device according to claim 10 wherein the device is a flow through capacitor.

15. The device according to claim 14 which further comprises at least one anode and at least one cathode.

16. The device according to claim 10 wherein the device is an electrodeionization module.

17. The device according to claim 16 which further comprises at least one anode and at least one cathode.

Assignees

• Fujifilm Mfg Europe Bv

Inventors

• Van Berchum Bastiaan
• Hessing Jacko
• Antheunis Harro

Classifications

• H01M8/227

  Dialytic cells or batteries; Reverse electrodialysis cells or batteries · CPC title

• H01M8/08

  Fuel cells with aqueous electrolytes · CPC title

• C02F2201/46115

  Electrolytic cell with membranes or diaphragms · CPC title

• B01J47/12

  characterised by the use of ion-exchange material in the form of ribbons, filaments, fibres or sheets, e.g. membranes (electrodialysis or electro-osmosis B01D61/42) · CPC title

• C02F1/4693

  electrodialysis · CPC title