Curable Compositions and Membranes

Patent metadata

Field	Value
Publication number	US-2017037206-A1
Application number	US-201515303294-A
Country	US
Kind code	A1
Filing date	Apr 21, 2015
Priority date	Apr 28, 2014
Publication date	Feb 9, 2017
Grant date	—

Abstract

A method for preparing an ionically-charged membrane comprising the steps (1) applying a film of curable composition to a support; (2) curing the film of curable composition to give anionically-charged membrane; and (3) removing the ionically-charged membrane from the support; wherein the curable composition comprises a) 5 to 50 wt % of curable compound comprising one ethylenically unsaturated group and anionic group; b) 10 to 70 wt % of crosslinking agent comprising at least two ethylenically unsaturated groups and having a molecular weight of at least 500 dalton per ethylenically unsaturated group; and c) 5 to 60 wt % of inert solvent.

First claim

1 . A method for preparing an ionically-charged membrane comprising the steps:
(1) applying a film of curable composition to a support; (2) curing the film of curable composition to give an ionically-charged membrane; and (3) removing the ionically-charged membrane from the support; wherein the curable composition comprises: a) 5 to 50 wt % of curable compound comprising one ethylenically unsaturated group and an ionic group; b) 10 to 70 wt % of crosslinking agent comprising at least two ethylenically unsaturated groups and having a molecular weight of at least 500 dalton per ethylenically unsaturated group; and c) 5 to 60 wt % of inert solvent.

2 . The method according to claim 1 wherein the crosslinking agent comprising at least two ethylenically unsaturated groups having a molecular weight of at least 700 dalton per ethylenically unsaturated group.

3 . The method according to claim 1 wherein the crosslinking agent comprising at least two ethylenically unsaturated groups having a molecular weight below 10,000 dalton.

4 . The method according to claim 1 wherein the said crosslinking agent has a solubility in water of less than 0.01 mol/l, when measured at 25° C.

5 . The method according to claim 1 wherein the film is applied to the support by a method comprising curtain coating, blade coating, air-knife coating, knife-over-roll coating, slide coating, slot die coating, nip roll coating, forward roll coating, reverse roll coating, micro-roll coating, dip coating, foulard coating, kiss coating, rod bar coating or spray coating.

6 . The method according to claim 1 wherein the curing is performed by a method comprising radical polymerisation using electromagnetic radiation.

7 . The method according to claim 1 wherein the ionically-charged membrane is removed from the support by a method comprising peeling the ionically-charged membrane from the support.

8 . The method according to claim 1 wherein the support is non-porous.

9 . The method according to claim 1 wherein the composition further comprises d) an organic compound which can form a salt with component a).

10 . (canceled)

11 . The method according to claim 1 wherein the molar ratio of component b) to a) is at least 0.05.

12 . The method according to claim 9 wherein the molar ratio of d) to the total number of cationic and anionic groups in component a) is at least 0.8.

13 . A curable composition comprising:
a) 5 to 50 wt % of curable compound comprising one ethylenically unsaturated group and an ionic group; b) 10 to 70 wt % of crosslinking agent comprising at least two acrylic groups and having a molecular weight of at least 500 dalton per ethylenically unsaturated group; and c) 5 to 60 wt % of inert solvent.

14 . The curable composition according to claim 13 wherein the molar ratio of component b) to a) is at least 0.05.

15 . The curable composition according to claim 13 comprising:
a) 8 to 40 wt % of curable compound comprising one ethylenically unsaturated group and a cationic or anionic group;
b) 15 to 60 crosslinking agent comprising at least two acrylic groups and having a molecular weight of at least 500 dalton per acrylic group;
c) 8 to 40 wt % inert solvent;
d) an organic compound which can form a salt with component a); and
e) 0.05 to 5 wt % radical initiator.

16 . The curable composition according to claim 15 wherein the molar ratio of d) to the total number of cationic and anionic groups in component a) is at least 0.8.

17 . The curable composition according to claim 13 wherein the molecular weight of component a) is less than 500 dalton.

18 . (canceled)

19 . An ionically-charged membrane obtained by the method according to claim 1 .

20 . A method of using the membrane according to claim 19 for the separation or purification of liquids, vapours or gases or for the generation of energy.

21 . (canceled)

22 . The method according to claim 9 wherein the organic compound which can form a salt with component a) is a tertiary amine having a molecular weight of less than 1000 dalton or an organic acid anion having a molecular weight of less than 1000 dalton.

23 . The curable composition according to claim 13 further comprising d) an organic compound which can form a salt with component a).

24 . The curable composition according to claim 23 wherein the organic compound which can form a salt with component a) is a tertiary amine having a molecular weight of less than 1000 dalton or an organic acid anion having a molecular weight of less than 1000 dalton.

Assignees

• Fujifilm Mfg Europe Bv

Inventors

• Antheunis Harro

Classifications

• C08J5/2231

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

• B01D53/228

  characterised by specific membranes · CPC title

• B01D2323/345

  UV-treatment · CPC title

• B01D2325/42

  Ion-exchange membranes · CPC title

• C08F222/10

  Esters · CPC title