FOAM AND COMPOSITION FOR FOAM

• US 20190322795A1
• Filed: 12/28/2017
• Published: 10/24/2019
• Est. Priority Date: 12/29/2016
• Status: Active Grant

• Current Assignee: ALCARE Co., Ltd.
• Original Assignee: ALCARE Co., Ltd.
• Inventors: KUBO, Takabumi, TANAKA, Tomoya, WATANABE, Ryota
• Granted Patent: US 11,952,455 B2
• Time in Patent Office: Days
• CPC Class Codes: A61L 15/26 Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives thereof A61L15/225 takes precedence
• CPC Class Codes: A61L 15/42 Use of materials characterised by their function or physical properties liquid bandages A61L26/00
• CPC Class Codes: A61L 15/425 Porous materials, e.g. foams or sponges
• CPC Class Codes: A61L 27/26 Mixtures of macromolecular compounds
• CPC Class Codes: A61L 27/56 Porous materials, e.g. foams or sponges
• CPC Class Codes: A61L 28/00 Materials for colostomy devices adhesives for colostomy devices A61L24/00
• CPC Class Codes: A61L 28/0015 obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
• CPC Class Codes: A61L 28/0053 Porous materials, e.g. foams or sponges
• CPC Class Codes: C08G 18/00 Polymeric products of isocyanates or isothiocyanates
• CPC Class Codes: C08G 18/14 Manufacture of cellular products
• CPC Class Codes: C08G 18/42 Polycondensates having carboxylic or carbonic ester groups in the main chain
• CPC Class Codes: C08G 18/48 Polyethers
• CPC Class Codes: C08G 18/73 acyclic
• CPC Class Codes: C08G 18/76 aromatic
• CPC Class Codes: C08G 2110/0008 flexible
• CPC Class Codes: C08L 1/286 substituted with acid radicals, e.g. carboxymethyl cellulose [CMC] C08L1/282 takes precedence
• CPC Class Codes: C08L 5/06 Pectin; Derivatives thereof
• CPC Class Codes: C08L 75/04 Polyurethanes

Abstract

The present invention provides a foam having a surface which solates or gelates after absorption of water and appropriately absorbs the water. The foam is prepared by a foam reaction of a mixture comprising at least one polyol, a compound having at least one isocyanate group, and a hydrophilic polymer.

Claims

1. :

A foam prepared by a foam reaction of a mixture comprising;

at least one polyol;

a compound having at least one isocyanate group; and

a hydrophilic polymer.

2. :

The foam according to claim 1,

wherein surfaces of the foam solate after water absorption.

3. :

The foam according to claim 1,

wherein the foam has a water release rate of 0 to 30%.

4. :

The foam according to claim 1,

wherein the hydrophilic polymer contains 10 mass % or more water.

5. :

The foam according to claim 1,

wherein the foam has an expansion rate of 110% to 500%.

6. :

The foam according to claim 1,

wherein the surfaces of the foam have tackiness before and/or after the water absorption.

7. :

The foam according to claim 1,

wherein the foam has a water absorption rate of 40% or more after immersion in water for six hours.

8. :

The foam according to claim 1,

wherein the mixture comprises;

25 to 80 mass % polyol;

5 to 30 mass % compound having at least one isocyanate group; and

5 to 50 mass % hydrophilic polymer.

9. :

The foam according to claim 1, further comprising a bioactive substance.

10. :

The foam according to claim 1,

wherein the foam has a thickness of 1.5 mm or more.

11. :

The foam according to claim 1,

wherein the polyol has an OH equivalent of 1000 or more, and polyisocyanate has an NCO equivalent of 100 or more.

16. :

A wound dressing, comprising the foam according to claim 1.

17. :

A skin protector for ostomy appliances, comprising the foam according to claim 1.

18. :

A skin tape, comprising the foam according to claim 1.

19. :

A hemostatic material, comprising the foam according to claim 1.

12. :

A composition for a foam comprising;

at least one polyol;

a compound having at least one isocyanate group; and

a hydrophilic polymer.

13. :

The composition for a foam according to claim 12,

wherein a content of the polyol is 25 to 85 mass %,

a content of the compound having at least one isocyanate group is 5 to 30 mass %, and

a content of the hydrophilic polymer is 5 to 50 mass %.

14. :

The composition for a foam according to claim 12, wherein the hydrophilic polymer contains 10 mass % or more water.

15. :

The composition for a foam according to claim 12,

wherein the polyol has an OH equivalent of 1000 or more, and polyisocyanate has an NCO equivalent of 100 or more.