Polyurethane gel foams

US8673992B2 · kind B2 · utility

Assignee

• PAUL HARTMANN AG · DE

Inventors

• Axel Eckstein · Heidenheim, DE
• Christian Schneider · Lörrach, DE

Key dates

• Filing date: Oct 21, 2009
• Grant date: Mar 18, 2014
• Expiry date: Nov 29, 2029

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08J2405/00
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

Polyurethane gel foams are proposed as is their use in modern wound treatment. In particular, wound dressings comprise polyurethane gel foams for treating moderately to severely exuding wounds. The polyurethane gel foams are thereby produced from an isocyanate component A having a functionality f of fB≦3, a polymeric polyol component B having a functionality f of fB≦6, and a polysaccharide C, comprising at least one uronic acid or a salt thereof, wherein the ratio of the number of isocyanates groups of the isocyananate component A to the total number of hydroxyl groups, carboxy groups and carboxylate groups in the polymeric polyol component B and the polysaccharide C corresponds to the ratio 1:2 to 1:30.