Hydrogel foams, and a process for their preparation

Abstract

Hydrogel foams a) based on gelatin and water, b) optionally containing polyvinyl alcohol, c) containing a crosslinking agent selected from the group comprising ca) the compounds of at least trivalent metals or semimetals, for example boric acid, borates, aluminium salts, titanates and alkyl titanates, and/or from the group comprising cb) organic and/or inorganic acids and/or salts thereof, for example gallic acid, gallates, phosphoric acids, phosphates, dihydroxybenzoic acid and dihydroxybenzoates, d) and optionally containing organic plasticizers, and/or auxiliary agents and/or additives.

Dependencies are inferred from the claim text.