METHOD OF FORMING MULTILAYERED TOPCOAT FILM

摘要

A method of forming a multilayered topcoat film through triple coating and double baking which comprises applying a first coating material (A) and a second coating material (B) to an article to be coated, heating both coating films to cure them, subsequently applying a clear coating material (C), and heating the coating film to cure it, characterized in that the first coating material (A) is an organic-solvent-base colored coating material, that the second coating material (B) is an organic-solvent-base coating material comprising an acrylic resin (b-1) whose backbone has, bonded thereto, two or more side chains each having at least one hydroxyl group and differing in length from each other, a polyepoxide (b-2), and a crosslinking agent (b-3), and that the clear coating material (C) is a powder coating material (C-1) or an organic-solvent-base coating material (C-2) comprising a hydroxylated carboxylated resin (c-2a) and a polyepoxide (c-2b). By the method, a multilayered topcoat film can be formed which is excellent in interlaminar adhesiveness, finish, and film performances.