Pseudo-thermosetting neutralized chitosan composition forming a hydrogel and a process for producing the same
US8835514B2 · kind B2 · utility
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4Claims
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Key dates
| Filing date | Mar 22, 2004 |
| Grant date | Sep 16, 2014 |
| Priority date | — |
| Expiry date | Nov 14, 2028 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2305/08
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The composition disclosed is a pseudo-thermosetting neutralized chitosan composition, neutralized with an hydroxylated base, forming a phosphate-free transparent hydrogel at a temperature higher than 5° C. Said composition contains a homogeneously reacetylated chitosan derived from a chitosan having a deacetylation degree of 80-90%, having a molecular weight of not smaller than 200 kDa and a deacetylation degree of 30-60%, and may further contain a diol. Said composition may be used as a drug delivery system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.