Patents Assigned to Hercules Corporation
  • Synthesis of high solids resins from amine terminated polyamides
    Patent number: 6908983
    Abstract: The present invention contemplates a process for forming polyaminoamide polymers formed by the reaction of a dibasic acid/ester with excess amounts of an amine; the intermediate polymer resulting therefrom; a process for synthesizing effective, high solids resins resulting from the reaction of intermediate polymers with an epihalohydrin; and the resultant high, solids resin. These resins may be used as wet strength resins in the papermaking industry.
    Type: Grant
    Filed: April 1, 2003
    Date of Patent: June 21, 2005
    Assignee: Hercules Corporation
    Inventor: William W. Maslanka
  • Use of graphite fibers to augment propellant burning rate
    Patent number: 4072546
    Abstract: Solid propellant compositions having graphite fibers dispersed throughout the propellant are provided. The graphite fibers augment the burning rate of the solid propellant.
    Type: Grant
    Filed: November 5, 1975
    Date of Patent: February 7, 1978
    Assignees: Hercules Incorporated, Hercules Corporation
    Inventor: Richard Winer