| abstract |
An object of the present invention is to provide a method capable of forming a multilayer coating film excellent in smoothness and sharpness. SOLUTION: A water-based intermediate coating, a water-based base coating, and a clear coating are sequentially applied onto an object to be coated, and the resulting intermediate coating, base coating, and clear coating are simultaneously heated and cured to form a multilayer coating. A method for forming a film, wherein the aqueous intermediate coating (X) comprises a base resin (A), a curing agent (B), and the following general formula (1): (In the formula, R 1 and R 2 independently represent a hydrocarbon group having 4 to 18 carbon atoms, R 3 represents an alkylene group having 2 to 4 carbon atoms, and m represents an integer of 3 to 25. The m oxyalkylene units (R 3 —O) may be the same as or different from each other.) A diester compound (C) represented by: It is a multilayer coating-film formation method whose said hardening | curing agent (B) is a polyisocyanate compound (B1) and / or a polycarbodiimide compound (B2). [Selection figure] None |