| abstract |
Provided is a method for forming a multi-layer coating film capable of forming a multi-layer coating film having excellent low-temperature curability, hardness, and finished appearance. A step of (1) coating an aqueous two-component first coloring paint (X) on an object to be coated to form an uncured first colored coating film, and (2) an uncured step (1) obtained in the step (1). A step of coating the water-based one-component second colored coating material (Y) on the first colored coating film to form an uncured second colored coating film, and the uncured step (3) obtained in step (2). A step of applying a two-component clear coating material (Z) on the second colored coating film to form an uncured clear coating film, and an uncured first step (4) formed in steps (1) to (3). A method for forming a multi-layer coating film, which sequentially performs a step of simultaneously curing a colored coating film, an uncured second colored coating film, and an uncured clear coating film by heating the above-mentioned aqueous coating film. A multi-layer in which the one-component second coloring paint (Y) contains a specific hydroxyl group-containing acrylic resin (Y1), a specific hydroxyl group-containing polyester resin (Y2), a blocked polyisocyanate compound, and / or a melamine resin (Y3). Coating film forming method. |