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US 2019/0322795 A1Published application
Foam and composition for foam
AssigneeAlcare Co., Ltd.
InventorsTakabumi KUBO, Tomoya TANAKA, Ryota WATANABE
Life of this patent
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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.
Claims19
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 more elements
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.
3 more elements
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.
12:
- A composition for a foam comprising:
- at least one polyol;
- a compound having at least one isocyanate group;
- and
- a hydrophilic polymer.
2 more elements
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 %.
1 more element
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.
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.