| abstract |
The present invention relates to a method for producing a hydrophilic polyurethane foam structure containing a silver salt, selected from the group of silver sulfate, silver citrate, silver acetate, silver carbonate, silver lactate and phosphate of silver, or a mixture of these salts. The method comprises the steps of (a) providing a water phase containing a surfactant, and at least one silver salt, wherein the at least one silver salt is dispersed in the water phase; (b) provide an isocyanate terminated polyether having functionality of more than (2); (c) mixing the water phase and the isocyanate-terminated polyether, immediately transfer the resulting mixture to a mold whereby a foam structure is obtained; and (d) drying the foam structure until it has a moisture content of at most 10% (weight). The invention also provides a hydrophilic polyurethane foam structure produced by the method and a wound bandage containing the foam structure. |