Acute care cover for severe injuries

Patent metadata

Field	Value
Publication number	US-11639412-B2
Application number	US-201916567681-A
Country	US
Kind code	B2
Filing date	Sep 11, 2019
Priority date	Mar 9, 2016
Publication date	May 2, 2023
Grant date	May 2, 2023

Abstract

A compound made by copolymerizing a poly(N-isopropylacrylamide) chain transfer agent, an acrylate salt, and a polyethylene glycol diacrylate. A compound made by copolymerizing a polyethylene glycol, a glycerol ethoxylate, and an aliphatic diisocyanate.

First claim

What is claimed is:

1. A compound made by a method consisting of:
copolymerizing a polyethylene glycol, an ethoxylated glycerol, an aliphatic diisocyanate, and optionally a poloxamer in the presence of water, optionally a solvent, and optionally a catalyst;
wherein the water reacts with the diisocyanate to form an amine and carbon dioxide forming a foam; and
wherein the amine copolymerizes with the diisocyanate.

2. The compound of claim 1 , wherein the polyethylene glycol has a weight average molecular weight of up to 4000.

3. The compound of claim 1 , wherein the ethoxylated glycerol has a number average molecular weight of 500-2000.

4. The compound of claim 1 , wherein the polyethylene glycol and the ethoxylated glycerol in the copolymerization have a molar ratio of 0.5-6.0.

5. The compound of claim 1 , wherein the aliphatic diisocyanate is hexamethylene diisocyanate.

6. The compound of claim 1 , wherein the isocyanate groups and the hydroxyl groups used in the copolymerization have a molar ratio of 1.0-1.2.

7. The compound of claim 1 , wherein the copolymerizing includes the poloxamer.

8. A bandage comprising the compound of claim 1 .

9. A method consisting of:
copolymerizing a polyethylene glycol, an ethoxylated glycerol, an aliphatic diisocyanate, and optionally a poloxamer in the presence of water, optionally a solvent, and optionally a catalyst;
wherein the water reacts with the diisocyanate to form an amine and carbon dioxide forming a foam; and
wherein the amine copolymerizes with the diisocyanate.

10. The method of claim 9 , wherein the copolymerizing includes the poloxamer.

11. The compound of claim 1 , wherein the ethoxylated glycerol has the structure

wherein each n is a positive integer.

12. The method of claim 9 , wherein the ethoxylated glycerol has the structure

wherein each n is a positive integer.

Assignees

• Us Gov Sec Navy

Inventors

• Wynne James H
• Lundin Jeffrey G
• Mcgann Christopher L
• Streifel Benjamin C
• Stockelman Michael G
• Watters Chaselynn M
• Bentley Timothy B
• Santee Christopher J

Classifications

• C08J2353/00

  Characterised by the use of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers · CPC title

• C08J2375/04

  Polyurethanes · CPC title

• C08J9/28

  by elimination of a liquid phase from a macromolecular composition or article, e.g. drying of coagulum · CPC title

• C08G18/4833

  Polyethers containing oxyethylene units · CPC title

• C08J2201/028

  Foaming by preparing of a high internal phase emulsion · CPC title