Hydrogel foams, and a process for their preparation

US5147344A · kind A · utility

Assignee

• BEIERSDORF AG · DE

Inventors

• Gunther Sachau · Norderstedt, DE
• Katrin Borgschulte · Hamburg, DE
• Hanns Pietsch · Hamburg, DE

Key dates

• Filing date: Mar 5, 1991
• Grant date: Sep 15, 1992
• Expiry date: Mar 5, 2011

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L89/06
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

Hydrogel foams PA0 a) based on gelatin and water, PA0 b) optionally containing polyvinyl alcohol, PA0 c) containing a crosslinking agent selected from the group comprising PA1 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 PA1 cb) organic and/or inorganic acids and/or salts thereof, for example gallic acid, gallates, phosphoric acids, phosphates, dihydroxybenzoic acid and dihydroxybenzoates, PA0 d) and optionally containing organic plasticizers, and/or auxiliary agents and/or additives.