Patents Assigned to Pacemaker, Ltd.
  • Spray drying method for preparing kaolin as a pigment extender
    Patent number: 5078793
    Abstract: Composite white pigments composed of titanium dioxide (TiO.sub.2) and kaolin are prepared by subjecting kaolin slurry to spray drying with injected gas to promote droplet fluffing and fragmentation. The slurry contains a hydrocolloid suspending agent and a cationic reagent for making the kaolin particles cationic. The frangible dry material thus produced can be blended with TiO.sub.2 particles to produce an extended TiO.sub.2 pigment.
    Type: Grant
    Filed: January 26, 1990
    Date of Patent: January 7, 1992
    Assignee: Pacemaker, Ltd.
    Inventor: Dennis W. Caton