Inventors:
Lawrence G. Anderson - Pittsburgh PA
Gerald W. Gruber - Gibsonia PA
Kurt A. Humbert - Allison Park PA
Gregory J. McCollum - Gibsonia PA
Karen A. Barkac - Murrysville PA
John W. Burgman - Gibsonia PA
Robert D. Lippert - Butler PA
Assignee:
PPG Industries Ohio, Inc. - Cleveland OH
International Classification:
C08F28300
Abstract:
Curable film-forming compositions containing epoxy functional copolymers, polycarboxylic acid crosslinking agents, and triaryltin compound having the chemical structure of (Ar). sub. 3 SnOR wherein the aryl groups are the same or different and at least one aryl group is substituted with at least one atom or group selected from the group consisting of carbon, nitrogen, oxygen, sulfur, phosphorous, silicon and halogen and R is selected from the group consisting of hydrogen, alkyl, and acyl groups are disclosed. The compositions do not release benzene during cure. The compositions may be powder or liquid and are useful as clear coats, particularly in a color-plus-clear composite coating system.