Patents by Inventor Han B. Yun

Han B. Yun 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).

  • Rheological additive for coating compositions
    Patent number: 5034444
    Abstract: A rheological additive for non-aqueous coating compositions is disclosed. The additive may be the reaction product of an alkoxylated aliphatic nitrogen-containing compound, an aliphatic diamine or mixtures thereof, and an organic polycarboxylic anhydride or acid, an alkanediol polyepoxide ether, or mixtures thereof. The additive provides excellent anti-sag and storage stability properties, particularly for high solids coating compositions, without causing a significant increase in viscosity. Also disclosed are coating compositions containing the additive.
    Type: Grant
    Filed: June 18, 1990
    Date of Patent: July 23, 1991
    Assignee: Rheox, Inc.
    Inventors: Han B. Yun, Alan Smith
  • Synthetic polymer
    Patent number: 4226754
    Abstract: There is provided a synthetic polymer useful as a thickener in aqueous compositions. The polymer preferably comprises the reaction product of methacrylic acid, methyl methacrylate and vinyl acetate in certain specified proportions. The thickener is particularly effective in latex paint formulations.
    Type: Grant
    Filed: June 8, 1978
    Date of Patent: October 7, 1980
    Assignee: NL Industries, Inc.
    Inventors: Han B. Yun, Alfred J. Whitton