Patents by Inventor Raymond H. Gunning

Raymond H. Gunning has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Polyester granules and process
    Patent number: 4137380
    Abstract: Aqueous slurries of vesiculated cross-linked polyester resin granules which show a shrinkage of less than 5% on drying are prepared by a double-emulsion process in the presence of polyamine having a pKa value of 8.5-10.5 at a concentration of 0.3 to 1.4 amine groups per carboxyl group of the polyester, the acid value of which is limited to 10-45 mgm KOH per gm.The granules are of particular use as opacifying matting agents in latex paints and avoid the defect observed hitherto of cracking at high film builds.
    Type: Grant
    Filed: December 17, 1974
    Date of Patent: January 30, 1979
    Assignee: Dulux Australia Ltd.
    Inventors: Raymond H. Gunning, Bruce C. Henshaw, Frederick J. Lubbock