Patents Examined by W. R. M. Clarke
  • Patent number: 5214101
    Abstract: A thermosetting powder coating composition which has good handling properties and which has a good bland of physical properties such as appearance, flexibility, hardness, solvent resistance, corrosion resistance and exterior durability is disclosed. The composition comprises a co-reactable particulate mixture of a carboxylic acid group-containing acrylic polymer, a second carboxylic acid group-containing polyurethane having sufficient crystallinity to assist in flow of the powder coating compositions, a beta-hydroxyalkylamide crosslinking agent and an amorphous acid group-containing polyurethane.
    Type: Grant
    Filed: August 24, 1992
    Date of Patent: May 25, 1993
    Assignee: PPG Industries, Inc.
    Inventors: Paul H. Pettit, Jr., Debra L. Singer, Marvin L. Kaufman