Kansai Paint USPTO patents

The multilayer coating film formation method for forming a multilayer coating film on a substrate comprises the steps of: applying an undercoat paint composition (X) comprising an antioxidant (a1) to a substrate to form at least one layer of an uncured first coating film; applying a topcoat paint composition (Y) containing a carboxy-containing polymer (b1) and an epoxy-containing acrylic resin (b2) to the first coating film to form an uncured second coating film; and simultaneously heating the uncured first coating film and the uncured second coating film to cure the films.

Provided is a method for forming a multilayer coating film, the method being capable of forming a high-brightness white multilayer coating film which is excellent in terms of brilliant feeling, smoothness, and weather resistance and with which white stains are suppressed.

The problem to be solved by the present invention is to provide an aqueous coating composition having an excellent finished appearance, such as smoothness and distinctness of image, as well as metallic feel and no metallic mottling when the composition comprises an effect pigment; excellent coating film performance, such as water resistance; and excellent storage stability.

Provided are: a method for producing a polymer composition containing a modified chlorinated polyolefin, which exhibits excellent production stability; and a coating material which contains a polymer composition containing a modified chlorinated polyolefin.

The present invention provides the following method for forming a multilayer coating film.

A laminate containing a metallic base layer and a transparent colored layer formed on the metallic base layer.

This invention relates to a paint composition comprising (A) a binder component and (B) a rheology control agent, the binder component (A) comprising an alkoxysilyl-containing acrylic resin (A1) and the rheology control agent (B) comprising a reaction product of (b1) a polyisocyanate compound, (b2) a primary monoamine having a number average molecular weight of 300 or less, and (b3) a polyether amine having a number average molecular weight of more than 300 but less than 6000.

This invention relates to a coating method comprising sequentially applying a paint (X) and a paint (Y) to a substrate, and thermally curing two layers simultaneously, wherein the paint (X) contains a binder (XA), the paint (Y) contains a binder (YA) and an alkoxysilyl-containing organopolysiloxane (YB), the alkoxysilyl-containing organopolysiloxane (YB) has a solids content of 0.01 to 20 mass % based on the resin solids content of the binder (YA), and at least one of the paint (X) and the paint (Y) contains a catalyst (C) that promotes hydrolysis condensation of alkoxysilyl.

The problem to be solved by the present invention is to provide an aqueous coating composition that can form a multilayer coating film having excellent storage stability, excellent adhesion to plastic base materials, excellent finish, and excellent coating film performance, such as water resistance; and to also provide a coating method using the composition.

The present invention relates to an effect pigment dispersion comprising water, a flake aluminum pigment, and a cellulose-based rheology control agent, wherein the effect pigment dispersion contains 0.1 to 10 parts by mass of solids based on 100 parts by mass of all components thereof, the viscosity measured using a Brookfield type viscometer is 400 to 10000 mPa·sec at a rotational speed of 6 revolutions per minute, and the solids content of the flake aluminum pigment is 30 to 200 parts by mass based on 100 parts by mass of the total amount of components other than the flake aluminum pigment in the total solids content.

The present invention relates to a multi-layer coating film formation method in which the following are performed: a step in which a primer coating film is formed; a step in which a base coating film is formed; a step in which a clear coating film is formed; and a step in which these coating films are caused to harden simultaneously.

A method for forming a multilayer coating film, the method including the following steps (1) to (3): (1) applying a colored paint (X) to a substrate to form a colored coating film whose lightness L* value in the L*a*b* color space is 5 or less, (2) applying an effect pigment dispersion (Y) to the colored coating film formed in step (1) to form an effect coating film, and (3) applying a clear paint (Z) to the effect coating film formed in step (2) to form a clear coating film, wherein the effect pigment dispersion (Y) contains water, a rheology control agent (A), and a flake-effect pigment (B), the flake-effect pigment (B) being an effect pigment in which a transparent or translucent base material is coated with a metal oxide, and the effect pigment dispersion (Y) having a solids content of 0.1 to 15 mass %; the obtained multilayer coating film has a Y value (Y5) of 50 or more, the Y value (Y5) representing a luminance in the XYZ color space based on spectral reflectance when light illuminated at an angle of 45 degrees with respect to the multilayer coating film is received at an angle of 5 degrees deviated from specular reflection light in the incident light direction; and the obtained multilayer coating film has a lightness L* value (L*25) of 25 or less in the L*a*b* color space when light illuminated at an angle of 45 degrees with respect to the multilayer coating film is received at an angle of 25 degrees deviated from specular reflection light in the incident light direction.

A coating method for a cationic electrodeposition coating material includes: a step of immersing a metallic article to be coated in a first solution bath, a step of immersing the article in a second solution bath and a step of immersing the article in a third solution bath; and at least one of the three steps includes a cationic electrodeposition coating in which a current is applied.

A method for producing an acrylic resin-coated silica particle dispersion by (1), mixing and heating silica particles (A), an organic solvent (B) and a monomer having a polymerizable unsaturated group and a hydrolyzable silyl group (C) to obtain a polymerizable unsaturated group-containing silica particle dispersion (i), (2) adding a tertiary amine (D) with a molecular weight of 120 to 380 and having a terminal alkyl and/or aryl group, to the component (i) dispersion, to obtain a polymerizable unsaturated group-containing silica particle dispersion (ii), and (3) reacting the component (ii) dispersion with a polymerizable unsaturated monomer (E), in a solid mass ratio of (ii):(E)=20:80 to 90:10, to obtain an acrylic resin-coated silica particle dispersion.