| abstract |
(57) [Abstract] [Purpose] An aqueous coating composition in which gas generation is reduced or prevented by containing a predetermined compound, To provide an organic solvent-based coating composition with improved color stability and a powder coating composition with improved pigment dispersibility. A water-based coating composition, an organic solvent-based coating composition, or a powder coating composition containing a film-forming polymer, a metal pigment, and a predetermined compound. Here, the predetermined compound is a reaction product of at least one phosphonic acid group of α-aminomethylenephosphonic acid and an epoxy group of a compound containing at least one epoxy group. This α- Aminomethylenephosphonic acid contains at least one group corresponding to the formula: [Chemical 1] |