Patents Assigned to PPG, Inc.
  • Low temperature curing polyuretdione compositions
    Patent number: 9080074
    Abstract: Composition and process for low temperature curing of polyuretdione-polyol compositions in which the polyuretdione is prepared from a polyisocyanate with isocyanate groups and a polyol containing primary hydroxyl groups. The catalyst for the composition and process is an amine catalyst containing the group —N?C—N—, being aprotic, having a pKa greater than 20 and upon addition to the liquid coating composition causing a phase-change of the coating composition from liquid to solid at 25° C. and 1 atm. within one week.
    Type: Grant
    Filed: March 19, 2010
    Date of Patent: July 14, 2015
    Assignees: Bayer MaterialScience LLC, Bayer MaterialScience AG, PPG, Inc.
    Inventors: Myron W. Shaffer, Abdullah Ekin, Carol L. Kinney, Dorota Greszta-Franz, Jonathan T. Martz, Jun Deng, Deborah E. Hayes, Stephen J. Thomas