To provide an efficient method for forming a three coat and one bake type multilayer coating film capable of yielding an excellent finish appearance.
The three coat and one bake type coating method comprising steps of applying an intermediate-coat paint, applying a base topcoat paint, applying a clear topcoat paint, and heating the resulting layers employs a two-component type intermediate-coat paint comprising an isocyanate compound as a cross-linking agent, whereby the surface of the intermediate coat can be made flat and smooth with the flowability of its surface being improved and the intermixing thereof with the upper layer and the volume shrinkage of the intermediate coat caused by components detached and separated therefrom in the step of the cross-linking reaction can be avoided, and thereby a painted article having an excellent finish appearance can be obtained.
COPYRIGHT: (C)2007,JPO&INPIT
TAKAHASHI MASAKI
NODA SHINJI
TAKAYANAGI MAKOTO
MINAMI TATSURO
NAKAZONO DAISUKE
IGARASHI KAZUO
IHARA OSAMU
