MULTILAYER FILM FORMING METHOD FOR PLASTIC MATERIAL, AND COATED MATERIAL THEREOF

摘要

PROBLEM TO BE SOLVED: To provide a coating method of a plastic material for automobile by which the curability of a water base paint is enhanced while keeping a film performance required for a clear layer by increasing the transfer of polyisocyanate compound to a base layer from the clear layer than heretofore. SOLUTION: The coating method of the plastic material for automobile is carried out by burning and curing a water base primer coating material, the water base paint and a high solid clear coating material used for a metallic material for the automobile by a three-coat one-bake system at 70-100°C. The high solid coating material consists essentially of a hydroxide group-containing resin and a polyisocyante compound in a specific constitution, and when the high solid clear coating material is applied, the non-volatile portion of the two layer coating film of the base primer coating material and the base paint is≥75 wt.%. COPYRIGHT: (C)2008,JPO&INPIT