Solvent composition comprising a mixture of a molecule having a sulphoxide function and a molecule having an amide function

Patent metadata

Field	Value
Publication number	US-2018201784-A1
Application number	US-201615757990-A
Country	US
Kind code	A1
Filing date	Sep 15, 2016
Priority date	Sep 15, 2015
Publication date	Jul 19, 2018
Grant date	—

Abstract

The invention relates to a solvent composition containing a mixture of at least one molecule having at least one sulphoxide function and at least one molecule having at least one amide function wherein the nitrogen atom supports a hydrogen atom. The invention also relates to the use of the solvent composition in order to stabilise polymer solutions. The invention also relates to a polymer solution containing the solvent composition and to a filtering membrane and an artificial leather obtained from the polymer solution.

First claim

1 . A solvent composition comprising a mixture of at least one molecule having at least one sulfoxide functional group and of at least one molecule having at least one amide functional group where the nitrogen atom carries a hydrogen atom (—NH—C(O)—), wherein said solvent composition comprises less than 1% by weight of polyethersulfones.

2 . The solvent composition according to claim 1 , wherein the molecule having the amide functional group is cyclic.

3 . The solvent composition according to claim 1 , wherein the molecule having a sulfoxide functional group is dimethyl sulfoxide.

4 . The solvent composition according to claim 1 , wherein the molecule having an amide functional group is 2-pyrrolidone.

5 . The solvent composition according to claim 1 , comprising dimethyl sulfoxide and 2-pyrrolidone.

6 . The solvent composition according to claim 1 , comprising:
from 21% to 75% by weight of the molecule having a sulfoxide functional group, from 25% to 80% by weight of the molecule carrying an amide functional group where the nitrogen atom carries a hydrogen atom, with respect to the total weight of the solvent composition.

7 . A method for improving the stability of solutions of polymers comprising sulfone or urethane functional groups, wherein the method comprises a step of combining the solvent composition according to claim 1 with polymer comprising sulfone functional groups or urethane functional groups.

8 . The method according to claim 7 , wherein the polymer comprises polysulfone or polyethersulfone or polyphenylsulfone.

9 . A polymer solution, said polymer solution comprising a solvent composition comprising a mixture of at least one molecule having at least one sulfoxide functional group and of at least one molecule having at least one amide functional group where the nitrogen atom carries a hydrogen atom (—NH—C(O)—), said polymer solution comprising less than 1% by weight of polyethersulfones.

10 . The polymer solution according to claim 9 , wherein the polymer comprises sulfone or urethane functional groups.

11 . The polymer solution according to claim 9 wherein the solvent composition comprises a mixture of at least one molecule having at least one sulfoxide functional group and of at least one molecule which is cyclic and which has at least one amide functional group where the nitrogen atom carries a hydrogen atom (—NH—C(O)—).

12 . The polymer solution according to claim 9 , comprising:
from 5% to 50% by weight of polymers, and from 50% to 95% by weight of the solvent composition, with respect to the total weight of the polymer solution.

13 . A filtration membrane obtained from the polymer solution according to claim 9 .

14 . An artificial leather obtained from the polymer solution according to claim 9 .

15 . A method of manufacturing an article selected from the group consisting of films, artificial leather, polymeric suede, polymeric fibers, coatings, membranes, batteries, and electronic circuits, or for protecting electric cables, wherein the method comprises a step of dissolving a polymer in a solvent composition according to claim 1 .

Assignees

• Arkema France

Inventors

• Schmitt Paul Guillaume

Classifications

• C08J3/11

  from solid polymers · CPC title

• C08L81/06

  Polysulfones; Polyethersulfones · CPC title

• C08J3/097

  Sulfur containing compounds · CPC title

• B01D69/08

  Hollow fibre membranes (manufacture of hollow fibres D01D5/24, D01F1/08) · CPC title

• C08J2381/06

  Polysulfones; Polyethersulfones · CPC title