Polyurethane foams for use in wound dressings
US6509388B1 · kind B1 · utility
13Cited by
7References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 15, 2001 |
| Grant date | Jan 21, 2003 |
| Priority date | — |
| Expiry date | Nov 15, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G2110/0083
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The invention provides a method of forming a polyurethane foam suitable for use as a wound-contacting layer, said method comprising: mixing 1 part by weight of an isocyanate-capped prepolymer having from 0.5 to 4.8 meq. NCO groups/g with from 0.4 to 1.0 parts by weight of water and an effective amount of a nonvolatile pharmaceutically acceptable acid to form a prepolymer mixture; allowing said prepolymer mixture to cure to form a foamed product; followed by drying the foamed product. The invention also provides acidified polyurethane foams obtainable by this method, and wound dressings comprising such foams.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.