Patents Assigned to Paper Manufactures Company
  • Skin adhesive hydrogel, its preparation and uses
    Patent number: 5306504
    Abstract: A skin adhesive hydrogel formed by mixing in aqueous medium: (A) major proportion of a high molecular weight water-soluble polyvinylpyrrolidone having ring opened pyrrolidone groups and (B) a minor proportion of a water-soluble multifunctional amine-containing polymer to form a water insoluble, water swellable cross-linked salt between carboxyl groups of the ring opened pyrrolidone groups and basic amine groups of the polyfunctional amine-containing polymer. The reaction is advantageously carried out in the presence of a plasticizer.
    Type: Grant
    Filed: December 9, 1992
    Date of Patent: April 26, 1994
    Assignee: Paper Manufactures Company
    Inventor: Donald H. Lorenz