Hydrogel wound dressing and method of preparing the same
US11571491B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 18, 2019 |
| Grant date | Feb 7, 2023 |
| Priority date | — |
| Expiry date | Aug 13, 2041 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61L26/008
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Disclosed herein is a hydrogel wound dressing produced by the steps of a) providing an hydrophobic polyol which has six hydroxyl groups, b) providing an hydrophilic diisocyanate obtained by reacting a second diisocyanate with a hydrophilic polyether diol, c) reacting the hydrophobic polyol with the hydrophilic diisocyanate to obtain a first prepolymer which includes 3 to 6 isocyanate groups, d) partially crosslinking the first prepolymer using a crosslinking agent to obtain a second prepolymer, and e) subjecting the second prepolymer to an end-capping reaction with a silane-containing compound to obtain the hydrogel wound dressing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.