Synthetic membrane composition comprising a fluorinated polyurethane

Patent metadata

Field	Value
Publication number	US-11649353-B2
Application number	US-201816642049-A
Country	US
Kind code	B2
Filing date	Aug 28, 2018
Priority date	Aug 28, 2017
Publication date	May 16, 2023
Grant date	May 16, 2023

Abstract

Disclosed are compositions that may be useful for forming synthetic membranes, methods of forming membranes therefrom, and membranes. In an embodiment, a membrane comprises a free hydrophilic polymer and a polyurethane, the polyurethane comprising a backbone comprising the reaction product of a diisocyanate, a polymeric aliphatic diol, and, optionally, a chain extender, wherein the backbone comprises a C 2 -C 16 fluoroalkyl or C 2 -C 16 fluoroalkyl ether, or the polyurethane comprises an endgroup comprising a C 2 -C 16 fluoroalkyl or C 2 -C 16 fluoroalkyl ether.

First claim

The invention claimed is:

1. A method of forming a membrane comprising the steps of:
a. forming a film from a composition comprising from 80 to 99.5 wt %, based on the total weight of the composition, of a solvent and from 0.5 to 20 wt %, based on the total weight of the composition, of a polymer mixture, the polymer mixture comprising:
i. from 65 to 90 wt %, based on the total weight of the polymer mixture, of a polyurethane comprising a backbone comprising the reaction product of:
1. a diisocyanate,
2. a polymeric aliphatic diol component comprising a polycarbonate diol or a polysiloxane diol, and
3. a chain extender, and

wherein the polyurethane comprises an endgroup comprising a C 2 -C 16 fluoroalkyl or C 2 -C 16 fluoroalkyl ether,
ii. from 10 to 35 wt %, based on the total weight of the polymer mixture, of a free hydrophilic polymer having a number average molecular weight of from 5,000 to 5,000,000 g/mol, and

b. evaporating the solvent, thereby forming a membrane.

2. The method according to claim 1 , wherein the polyurethane comprises from 0.1 wt % to 3 wt %, based on the total weight of the polyurethane, of an endgroup comprising a C 2 -C 16 fluoroalkyl or C 2 -C 16 fluoroalkyl ether.

3. The method according to claim 1 , wherein the polymeric aliphatic diol component consists of a polycarbonate diol.

4. The method according to claim 1 , wherein the polymeric aliphatic diol component comprises a polycarbonate diol and a polysiloxane diol.

5. The method according to claim 1 , wherein the polymeric aliphatic diol component consists of a polycarbonate diol and a polysiloxane diol.

6. The method according to claim 1 , wherein the polymeric aliphatic diol component comprises a polycarbonate diol and a poly(tetramethylene oxide) diol.

7. The method according to claim 1 , wherein the polymeric aliphatic diol component consists of a polycarbonate diol and a poly(tetramethylene oxide) diol.

8. The method according to claim 1 , wherein the polymeric aliphatic diol component comprises a polysiloxane diol and a poly(tetramethylene oxide) diol.

9. The method according to claim 1 , wherein the polymeric aliphatic diol component consists of a polysiloxane diol and a poly(tetramethylene oxide) diol.

10. The method according to claim 1 , wherein the diisocyanate is an aliphatic diisocyanate.

11. The method according to claim 1 , wherein the polymeric aliphatic diol component is devoid of hydrophilic polymeric aliphatic diol.

12. The method according to claim 1 , wherein the solvent comprises tetrahydrofuran (THF), methyl-tetrahydrofuran (methyl-THF), or a mixture thereof.

13. The method according to claim 1 , wherein the solvent comprises tetrahydrofuran (THF), methyl-tetrahydrofuran (methyl-THF), or a mixture thereof and wherein a co-solvent is present and comprises methanol, ethanol, isobutanol, propanol, methyl ethyl ketone, or a mixture thereof.

14. The method according to claim 1 , wherein the solvent consists of tetrahydrofuran (THF), methyl-tetrahydrofuran (methyl-THF), or a mixture thereof and optionally a co-solvent consisting of methanol, ethanol, isobutanol, propanol, methyl ethyl ketone, or a mixture thereof.

15. The method according to claim 1 , wherein the solvent comprises 40 wt % or more of tetrahydrofuran (THF), methyl-tetrahydrofuran (methyl-THF), or a mixture thereof, and methanol, ethanol, isobutanol, propanol, methyl ethyl ketone, or a mixture thereof at an amount of from 1 to 60 wt %, based on the total amount of solvent in the composition.

16. The method according to claim 1 , wherein the solvent is present in an amount of 90 wt % to 99 wt %, based on the total weight of the composition.

Assignees

• Dsm Ip Assets Bv

Inventors

• Al-Rashid Jennifer
• Zupancich John
• Sugiyama Chad

Classifications

• C08L79/06

  Polyhydrazides; Polytriazoles; Polyamino-triazoles; Polyoxadiazoles · CPC title

• A61B5/14532

  for measuring glucose, e.g. by tissue impedance measurement · CPC title

• A61B2562/0295

  Strip shaped analyte sensors for apparatus classified in A61B5/145 or A61B5/157 · CPC title

• B01D71/54

  Polyureas; Polyurethanes · CPC title

• B01D67/0011

  Casting solutions therefor · CPC title