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| 국가/구분 | United States(US) Patent 등록 |
|---|---|
| 국제특허분류(IPC7판) |
|
| 출원번호 | US-0989270 (1992-12-11) |
| 발명자 / 주소 |
|
| 출원인 / 주소 |
|
| 인용정보 | 피인용 횟수 : 546 인용 특허 : 0 |
Relatively thin, collapsed, i.e. unexpanded, polymeric foam materials that, upon contact with aqueous body fluids, expand and absorb such fluids, are disclosed. A process for consistently obtaining such relatively thin, collapsed polymeric foam materials by polymerizing a specific type of water-in-o
Relatively thin, collapsed, i.e. unexpanded, polymeric foam materials that, upon contact with aqueous body fluids, expand and absorb such fluids, are disclosed. A process for consistently obtaining such relatively thin, collapsed polymeric foam materials by polymerizing a specific type of water-in-oil emulsion, commonly known as High Internal Phase Emulsions or “HIPE”, is also disclosed.
A collapsed polymeric foam material which, upon contact with aqueous body fluids, expands and absorbs said fluids, said polymeric foam material comprising a hydrophilic, flexible, nonionic polymeric foam structure of interconnected open cells, which foam structure has: A) a specific surface area per
A collapsed polymeric foam material which, upon contact with aqueous body fluids, expands and absorbs said fluids, said polymeric foam material comprising a hydrophilic, flexible, nonionic polymeric foam structure of interconnected open cells, which foam structure has: A) a specific surface area per foam volume of at least about 0.025 m2/cc; B) at least about 0.1% by weight of said polymeric foam material of a toxicologically acceptable hygroscopic, hydrated salt incorporated therein: C) in its collapsed state, an expansion pressure of about 30 kPa or less; and D) in its expanded state, a density when saturated at 88°F. (31.1°C.) to its free absorbent capacity with synthetic urine having a surface tension of 65±5 dynes/cm of from about 10 to about 50% of its dry basis density in its collapsed state.
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