IPC분류정보
| 국가/구분 |
United States(US) Patent
등록
|
| 국제특허분류(IPC7판) |
|
| 출원번호 |
UP-0405583
(2009-03-17)
|
| 등록번호 |
US-7794839
(2010-10-04)
|
|
발명자
/ 주소 |
- Schmidt, Mattias
- Meyer, Axel
- Ehrnsperger, Bruno Johannes
- Goldman, Stephen Allen
- Urankar, Edward Joseph
|
| 출원인 / 주소 |
- The Procter & Gamble Company
|
| 대리인 / 주소 |
|
| 인용정보 |
피인용 횟수 :
15 인용 특허 :
100 |
초록
▼
This invention is directed to coated water-swellable materials, typically solid, particulate, water-swellable materials, i.e. materials that comprise hydrogel-forming polymers, whereof at least a part is coated with a coating, which substantially does not break when the polymers swell, as set out in
This invention is directed to coated water-swellable materials, typically solid, particulate, water-swellable materials, i.e. materials that comprise hydrogel-forming polymers, whereof at least a part is coated with a coating, which substantially does not break when the polymers swell, as set out in the method herein. Said coating is present at a level of at least 1% by weight of the water-swellable material. The coating comprises preferably an elastomeric polymeric material. The invention also relates products, e.g., disposable absorbent articles, comprising such coated water-swellable material.
대표청구항
▼
What is claimed is: 1. A water-swellable material that comprises hydrogel forming polymers in the form of particles, the water-swellable material having less than 20% weight of water, the hydrogel forming polymers being coated by a coating formed from a coating agent comprising an elastomeric polym
What is claimed is: 1. A water-swellable material that comprises hydrogel forming polymers in the form of particles, the water-swellable material having less than 20% weight of water, the hydrogel forming polymers being coated by a coating formed from a coating agent comprising an elastomeric polymeric material, whereby said coating is present at a level of at least 1% by weight of the water-swellable material, and wherein the water swellable material has a CCRC of at least 10 g/g and wherein, for at least a part of the coated hydrogel forming polymers, said coating is non-breaking, when the water-swellable material is swollen to equilibrium in 0.9% saline solution and wherein said part of the coated hydrogel forming polymers that has a non-breaking coating of an elastomeric polymeric material is at least 60% by weight of the material having a coating with an elastomeric, polymeric material. 2. A water-swellable material according to claim 1, wherein the coating has an average thickness of at least 5 μm. 3. A water-swellable material according to claim 1, wherein the coating has an average thickness of at least 10 μm. 4. The water-swellable material according to claim 1, wherein the coating covers at least about 80% of the surface of the hydrogel forming polymer. 5. The water-swellable material according to claim 1, wherein the coating is completely continuous. 6. The water-swellable material according to claim 1, wherein the coating is completely connected. 7. The water-swellable material according to claim 1, wherein the coating completely circumscribes the hydrogel forming polymer. 8. The water-swellable material according to claim 1, wherein the hydrogel forming polymer has a mass median particle size of from about 10 μm to about 1 mm. 9. A water-swellable material that comprises hydrogel forming polymers in the form of particles, the water-swellable material having less than 20% weight of water, the hydrogel forming polymer being coated by a coating formed from a coating agent comprising a polyurethane, whereby said coating is present at a level of at least 1% by weight of the water-swellable material, and wherein the water swellable material has a CCRC of at least 10 g/g and wherein, for at least a part of the coated hydrogel forming polymers, said coating is non-breaking, when the water-swellable material is swollen to equilibrium in 0.9% saline solution and wherein said part of the coated hydrogel forming polymers that has a non-breaking coating of an elastomeric polymeric material is at least 60% by weight of the material having a coating with an elastomeric, polymeric material. 10. A water-swellable material according to claim 9, wherein the coating has an average thickness of at least 5 μm. 11. A water-swellable material according to claim 9, wherein the coating has an average thickness of at least 10 μm. 12. The water-swellable material according to claim 9, wherein the coating covers at least about 80% of the surface of the hydrogel forming polymer. 13. The water-swellable material according to claim 9, wherein the coating is completely continuous. 14. The water-swellable material according to claim 9, wherein the coating is completely connected. 15. The water-swellable material according to claim 9, wherein the coating completely circumscribes the hydrogel forming polymer. 16. The water-swellable material according to claim 9, wherein the hydrogel forming polymer has a mass median particle size of from about 10 μm to about 1 mm.
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