Patent ID: 6365169
Filing Date: 2002-04-02
Classification: A01N,A61L,C08F

Abstract:
A method of preparing a substrate coating containing polyvinyl alcohol wherein said coating is insoluble in boiling water, comprising:(i) coating said substrate with polyvinyl alcohol, or mixtures of polyvinyl/alcohol and starch wherein said substrate is selected from the group consisting of urethane sponge, cellulose sponge, paper, cloth, non-woven material, polyvinyl chloride coated urethane, polyester foam, washcloth, cheesecloth pad, gauze woven rayon, gauze non-woven rayon, polyester non-woven wound healing material, dressing, polyesters, metal screens, fiberglass, urethane foam filter, mixed fibers, cellulose, fibrous matrixes, yarn, cotton gauze, felts, paper towelettes, napkins, surgical masks, surgical drapes, surgical dressings, abrasive pot scrubbing pads, polyester urethane foam, and combinations thereof; (ii) cross-linking said polyvinyl alcohol on the surface of said substrate in the presence of a non-mineral acid catalyst and optionally in the presence of a cross-linking agent; and (iii) complexing said coating with an antimicrobial agent selected from the group consisting of iodine and borate-containing compounds and mixtures thereof whereby said coating exhibits antimicrobial activity.