18918618. METHOD FOR FORMING MULTILAYER COATING FILM (TOYOTA JIDOSHA KABUSHIKI KAISHA)
METHOD FOR FORMING MULTILAYER COATING FILM
Organization Name
TOYOTA JIDOSHA KABUSHIKI KAISHA
Inventor(s)
Takao Tsukimori of Aichi-ken JP
METHOD FOR FORMING MULTILAYER COATING FILM
This abstract first appeared for US patent application 18918618 titled 'METHOD FOR FORMING MULTILAYER COATING FILM
Original Abstract Submitted
An object of the present invention is to provide a method for forming a multilayer coating film, the method being capable of providing a multilayer coating film with excellent finished appearance and luster. The aqueous base paint (X) comprises: a hydroxy-containing acrylic resin particle (X1) having a core-shell structure wherein the shell has an acid value of 90 to 100 mg KOH/g; and a hydroxy-containing acrylic resin particle (X2) having a core-shell structure wherein the shell has an acid value of 110 to 120 mg KOH/g; and an associative thickener (X3), wherein the proportions of the hydroxy-containing acrylic resin particle (X1) and the hydroxy-containing acrylic resin particle (X2) contained in the aqueous base paint (X) are such that the ratio by mass of the hydroxy-containing acrylic resin particle (X1) to the hydroxy-containing acrylic resin particle (X2) (X1/X2) is in the range of 70/30 to 30/70. The effect pigment dispersion (Y) contains a flake-aluminum pigment (Y1), a cellulose-based rheology control agent (Y2), a surface-adjusting agent (Y3), and water, and has a solids content within the range of 2 to 6 mass %. The effect coating film formed using the effect pigment dispersion (Y) has a cured film thickness of 0.5 to 1.5 μm.