Gelling agent resulting from the combination of a chitosan and of an alginate of alkyl or hydroxyalkyl and its use in the preparation of cosmetic compositions and pharmaceutical particulars.

摘要

Gelling agents comprising at least one chitosan and at least one partial alkyl or hydroxy alkyl alginate pref. where the hydroxy alkyl group is derived from propylene glycol in which the esterification level is at least 70%, are new.The chitosan is prepd. by deacetylation of natural chitin, 50% and preferably 80-100% deacetylation being effected. The chitosan may be substituted by carboxymethyl, carboxybutyl, or succinyl groups.