| abstract |
Disclosed is a method for forming a multilayer coating film wherein an aqueous first colored coating composition, an aqueous second colored coating composition, and a clear coating composition are sequentially applied to an object to be coated, and then the thus-obtained first colored coating film, second colored coating film and clear coating film are baked at a time. The aqueous first colored coating composition (A) contains a polyester resin and a curing agent, and the polyester resin contains a benzene ring and a cyclohexane ring in a molecule in an amount of 1.0-2.2 mol/kg (resin solid content) in total, while the curing agent is composed of at least one compound selected from the group consisting of isocyanate group-containing compounds, oxazoline group-containing compounds, carbodiimide group-containing compounds, hydrazide group-containing compounds and semicarbazide group-containing compounds. By this method, a coating film excellent in smoothness, sharpness, chipping resistance and water resistance can be formed by a three-coat one-bake system. |