Patents Examined by Duc Truons
  • Synthesis of high solids-content wet-strength resin
    Patent number: 5644021
    Abstract: Disclosed is an improvement in a method of making a water-soluble epichlorohydrin resin involving reacting epichlorohydrin with a polyaminoamide. The improvement involves preparing the polyaminoamide in the presence of an acid catalyst (low temperature condensation) followed by reaction with epichlorohydrin.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: July 1, 1997
    Assignee: Hercules Incorporated
    Inventor: William Ivalter Maslanka