Patent ID: 9555120
Date: 2017-01-31
CPC Classifications: A61K,C08B,C08J,C08L,C09K

Claim:
1. A composition comprising: (i) a chitosan hydrogel comprising a chitosan component consisting of cross-linked chitosan as the sole chitosan component; and water; (ii) a liquid dispersed in the hydrogel; and (iii) an emulsifier, wherein the cross-linked chitosan is prepared from chitosan consisting of a randomly deacetylated linear polysaccharide consisting of 1,4-beta-linked D-glucosamine and N-acetyl-D-glucosamine residues having a degree of deacetylation of above 35 to 75%, and a bi-functional cross-linking agent, where the molar ratio of the cross-linking agent to the chitosan is 0.2:1 or less based on the number of functional groups in the bi-functional cross-linking agent and the number of deacetylated amino groups in the chitosan.