Patent Number: 6,165,621

Title: Method for forming multi-layer metallic coating film

Abstract: A method for forming a multi-layer metallic coating film, the method being a 3-coat system comprising the steps of applying the following coating compositions (A), (B) and (C) in this order to a metal substrate coated with a cationically electrodepositable coating composition; (A) an organic solvent-based thermosetting metallic first base coating composition which comprises a neutralized carboxyl-containing resin having an acid value of 5 to 100 mg KOH/g, an amino resin and a metallic pigment, the composition having a substrate-hiding power corresponding to up to 3% transmittance of light at a wavelength of 400 to 700 nm in a 15 .mu.m-thick cured coating film, (B) an aqueous thermosetting second base coating composition which has a transparency corresponding to 10 to 95% transmittance of light at a wavelength of 400 to 700 nm in a thick cured coating film, and (C) an organic solvent-based thermosetting clear coating composition. The method of the invention gives a multi-layer metallic coating film on a metal substrate, the film being improved in esthetic property, surface smoothness and so on.

Inventors: Kasari; Akira (Hiratsuka, JP), Oda; Hiroaki (Kitakyushu, JP), Endo; Mitsugu (Ashigarakami-gun, JP), Shimakawa; Mikio (Hiratsuka, JP), Yokoyama; Tetsuya (Hiratsuka, JP)

Assignee: Kansai Paint Co., Ltd.

International Classification: B05D 5/06 (20060101); B05D 7/00 (20060101); C09D 5/38 (20060101); C25D 13/00 (20060101); B05D 007/16 (); B05D 005/06 ()

Expiration Date: 12/26/2017