Patents Assigned to Callaway Chemical Corp.
  • Polyester water-based defoamer
    Patent number: 6464828
    Abstract: Polyester water-based defoamers are prepared by reaction of a dimer fatty acid, a fatty acid and two different polyalkylene polyols, e.g. polypropylene glycol and polyethylene glycol. The resulting polyesters are readily dispersible in water to form a water-based macroemulsion in the absence of any oil or short chain alcohols. The macroemulsion is an effective defoamer in ground-wood and thermomechanical pulping operations.
    Type: Grant
    Filed: March 1, 2000
    Date of Patent: October 15, 2002
    Assignee: Callaway Chemical Corp.
    Inventor: Robert Furman