Color stabilized hydrogel dressing and process
US4646730A · kind A · utility
69Cited by
8References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 23, 1986 |
| Grant date | Mar 3, 1987 |
| Priority date | — |
| Expiry date | May 23, 2006 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61L2300/404
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A polyvinylpyrrolidone(PVP)/Silver Sulfadiazine (SSD) hydrogel dressing in which the gel is formed by the use of electron beam (E-Beam) radiation to cross-link the polyvinylpyrrolidone (PVP); in which the color of the hydrogel dressing has been stabilized by the addition thereto of magnesium trisilicate and, optionally but preferably, also hydrogen peroxide and/or polyacrylic acid is disclosed; and also the process of stabilizing the color by adding magnesium trisilicate, to a water dispersion of PVP and SSD before it is exposed to E-Beam radiation is disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.