Method for forming multilayer coating film
AssigneeKansai Paint Co., Ltd.
InventorsKeitaro YAMAMOTO, Masahiro TADA, Hirohisa TSUDA, Hideaki KATSUTA
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Abstract
The present invention provides the following method for forming a multilayer coating film. The method comprises forming an uncured coating film of a specific primer paint composition (A) on a substrate, forming a top coating film of a specific top paint composition (B) on the uncured coating film, and simultaneously drying the films. The primer paint composition (A) is a paint composition comprising an epoxy resin (a1), a rust preventive pigment (a2), a color pigment (a3), and an extender pigment (a4); and the top paint composition (B) is a paint composition comprising an acrylic resin (b1) and an active methylene blocked polyisocyanate compound (b2).
Claims6
A method for forming a multilayer coating film comprising forming an uncured coating film of a primer paint composition (A) as defined below on a substrate, forming a top coating film of a top paint composition (B) as defined below on the uncured coating film, and simultaneously drying the films;
- Primer paint composition (A):
- a paint composition comprising an epoxy resin (a1), a rust preventive pigment (a2), a color pigment (a3), and an extender pigment (a4), the composition containing the rust preventive pigment (a2) in an amount of 1 to 70 parts by mass, the color pigment (a3) in an amount of 40 to 150 parts by mass, and the extender pigment (a4) in an amount of 40 to 150 parts by mass, per 100 parts by mass of the total solids content of the epoxy resin (a1);
- Top paint composition (B):
- a paint composition comprising an acrylic resin (b1) and an active methylene blocked polyisocyanate compound (b2), the composition containing the acrylic resin (b1) and the active methylene blocked polyisocyanate compound (b2) in a proportion of 60 to 80 parts by mass to 20 to 40 parts by mass, per 100 parts by mass of the total solids content of the acrylic resin (b1) and the active methylene blocked polyisocyanate compound (b2).
Dependencies are inferred from the claim text.