Hot-melt composition comprising hydrocolloids
US9012529B2 · kind B2 · utility
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14Claims
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Key dates
| Filing date | Jun 22, 2005 |
| Grant date | Apr 21, 2015 |
| Priority date | — |
| Expiry date | Mar 8, 2026 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61L15/60
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A hot-melt formulation useful as a wound dressing comprises a chemically crosslinked polymer matrix obtainable from prepolymers crosslinkable by means of photopolymerization. Hydrocolloids are embedded in the chemically crosslinked polymer, matrix. The formulation is obtainable by combining the prepolymers and hydrocolloids, and heating and processing the mixture through a slot die, wherein the mixture has a viscosity of less than 100 Pa*s and a processing temperature of less than 150° C. The prepolymers are crosslinked by means of photopolymerization by irradiation with UV light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.