Abstract: An object achieved by the present invention is to provide a coated article having excellent appearance, corrosion resistance, weatherability, and chipping resistance obtained by a wet-on-wet coating.

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).

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).

Abstract: An object achieved by the present invention is to provide a coated article having excellent appearance, corrosion resistance, weatherability, and chipping resistance obtained by a wet-on-wet coating.

Abstract: This invention provides a water-based primer composition comprising (A) an aqueous dispersion of modified polyolefin, (B) an aqueous urethane resin and/or aqueous acrylic resin, (C) a pyrazole-blocked polyisocyanate compound and (D) an electrically conducting pigment, its (C) pyrazole-blocked polyisocyanate compound content being within a range of 5-50 mass % based on the total solid content of the components (A), (B) and (C), said electrically conducting pigment (D) containing an electrically conducting metal oxide (D-1), and the content of the electrically conducting pigment (D) being within a range of 50-200 mass parts per 100 mass parts of the total solid resin content in the composition; and also methods for coating plastic shaped articles using the composition.

Abstract: This invention discloses a coating method of plastic molded articles, which can form multilayer coating film composed of three layers of water-based primer, water-based base paint and clear paint, the film excelling in adherability to plastic molded articles, water resistance and durability, even when low-temperature baking at not higher than 100° C. is carried out in 3-coat-1-bake system.

Abstract: An aqueous primer composition comprising (A) a modified polyolefin aqueous dispersion, (B) an aqueous urethane resin and/or aqueous acrylic resin, (C) a conductive metal oxide and (D) aluminum flakes, characterized in that the solid mass ratio of component (A)/component (B) is in the range of 15/85-80/20, component (C) is present in a range of 50-300 parts by mass with respect to 100 parts by mass of the total resin solid portion in the composition, and component (D) is present in a range of 1-30 parts by mass with respect to 100 parts by mass of the total resin solid portion in the composition. It is possible to form high-brightness and high-chroma paint colors on plastic molded articles such as automobile bumpers, and to form primer coating films with sufficient conductivity and excellent water resistance and humidity resistance.

Abstract: This invention provides a water-based primer composition comprising an aqueous dispersion of modified polyolefin, aqueous urethane resin and/or aqueous acrylic resin, specific diester compound and electrically conducting pigment, the content of the diester compound being specific. The water-based primer composition excels in adhesive property to plastic substrates, and use of the water-based primer composition enables formation of multilayered coating film excelling in finished appearance and water resistance, being free of layer mixing even when the top coating of the next step is carried out after the primer's application without an intervening preheating.

Abstract: The present invention provides an aqueous intermediate coating composition comprising (A) an acrylic emulsion resin having a hydroxy value of 5 to 80 mgKOH/g and an acid value of 1 to 15 mgKOH/g, obtainable by emulsion polymerization of monomer mixture (a) comprising ethyl acrylate, a hydroxy-containing radically polymerizable unsaturated monomer and a carboxy-containing radically polymerizable unsaturated monomer, the ethyl acrylate content of the monomer mixture being 60 wt. % or more; (B) a carboxy-containing resin having a hydroxy value of more than 80 mgKOH/g but not more than 200 mgKOH/g; (C) a curing agent; and (D) a coloring pigment, and having a solids content of 60 wt. % or more. The invention also provides a method for forming a multilayer coating film using said aqueous intermediate coating composition.

Abstract: An aqueous resin composition obtained by emulsion polymerization using a polymerizable unsaturated monomer (b) in the presence of an aqueous resin dispersion (A) comprising an acid-modified polyolefin (a), an ether-based solvent and a basic substance. Also, an aqueous coating composition comprising an aqueous resin dispersion (B) obtained by emulsion polymerization of a polymerizable unsaturated monomer (b) in the presence of an aqueous resin dispersion (A) containing an acid-modified polyolefin (a), an ether-based solvent and a basic substance, with resin beads (C), wherein the content of resin beads (C) is 1-30 parts by mass with respect to 100 parts by mass of the total resin solid content of the coating material. The composition has excellent adhesion for plastic bases and allows formation of coated films with excellent water resistance, stain resistance, damage resistance and solvent resistance.

Abstract: An aqueous primer composition comprising (A) a modified polyolefin aqueous dispersion, (B) an aqueous urethane resin and/or aqueous acrylic resin, (C) a conductive metal oxide and (D) aluminum flakes, characterized in that the solid mass ratio of component (A)/component (B) is in the range of 15/85-80/20, component (C) is present in a range of 50-300 parts by mass with respect to 100 parts by mass of the total resin solid portion in the composition, and component (D) is present in a range of 1-30 parts by mass with respect to 100 parts by mass of the total resin solid portion in the composition. It is possible to form high-brightness and high-chroma paint colors on plastic molded articles such as automobile bumpers, and to form primer coating films with sufficient conductivity and excellent water resistance and humidity resistance.

Abstract: An automobile body-used light-colored water based coating composition containing a water dispersion (A1) prepared by water-dispersing a block copolymer resin (A) comprising a copolymer (a1) obtained by copolymerizing a monomer component containing an olefin monomer and a copolymer (a2) obtained by copolymerizing a monomer component containing a carboxyl group or carboxylic anhydride group-containing vinyl monomer, a hydroxyl group-containing resin (B), a curing agent (C) and a color pigment, a resulting coating film having a lightness L* value in accordance with a L*a*b* color system as defined in JIS Z 8729 in the range of 80 or more.

Abstract: A water based intercoat coating composition containing (A) a polyester resin comprising, as essential components, an alicyclic polybasic acid (a1) and/or an alicyclic polyhydric alcohol (a2), other polybasic acid (a3) and other polyhydric alcohol (a4), (B) a crosslinking agent, and (C) a water based urethane resin emulsion.

Abstract: The present invention provides an aqueous intermediate coating composition comprising (A) an acrylic emulsion resin having a hydroxy value of 5 to 80 mgKOH/g and an acid value of 1 to 15 mgKOH/g, obtainable by emulsion polymerization of monomer mixture (a) comprising ethyl acrylate, a hydroxy-containing radically polymerizable unsaturated monomer and a carboxy-containing radically polymerizable unsaturated monomer, the ethyl acrylate content of the monomer mixture being 60 wt. % or more; (B) a carboxy-containing resin having a hydroxy value of more than 80 mgKOH/g but not more than 200 mgKOH/g; (C) a curing agent; and (D) a coloring pigment, and having a solids content of 60 wt. % or more. The invention also provides a method for forming a multilayer coating film using said aqueous intermediate coating composition.

Abstract: A light-colored water based intercoat coating composition containing a hydroxyl group-containing resin (A), a curing agent (B) and a color pigment (C), a resulting coating film having a lightness index or a L value of 80 or more, the curing agent (B) being a blocked polyisocyanate curing agent (B1) blocked with a pyrazole blocking agent.

Abstract: An automobile body-used light-colored water based coating composition containing a water dispersion (A1) prepared by water-dispersing a block copolymer resin (A) comprising a copolymer (a1) obtained by copolymerizing a monomer component containing an olefin monomer and a copolymer (a2) obtained by copolymerizing a monomer component containing a carboxyl group or carboxylic anhydride group-containing vinyl monomer, a hydroxyl group-containing resin (B), a curing agent (C) and a color pigment, a resulting coating film having a lightness L* value in accordance with a L*a*b* color system as defined in JIS Z 8729 in the range of 80 or more.

Abstract: An automobile body external panel-used water based coating composition containing, as essential components, (A) a resin particle containing an olefin polymer and an acrylic polymer in the same particle, (B) a hydroxyl group-containing resin, (C) a curing agent, and (D) a pigment, and a multi-layer coating film-forming method by use of the water based coating composition.

Abstract: A light-colored water based intercoat coating composition containing a hydroxyl group-containing resin (A), a curing agent (B) and a color pigment (C), a resulting coating film having a lightness index or a L value of 80 or more, the curing agent (B) being a blocked polyisocyanate curing agent (B1) blocked with a pyrazole blocking agent.

Abstract: A water based intercoat coating composition containing (A) a polyester resin comprising, as essential components, an alicyclic polybasic acid (a1) and/or an alicyclic polyhydric alcohol (a2), other polybasic acid (a3) and other polyhydric alcohol (a4), (B) a crosslinking agent, and (C) a water based urethane resin emulsion.

Abstract: A water based intercoat coating composition containing (A) a polyester resin comprising, as essential components, an alicyclic polybasic acid (a1) and/or an alicyclic polyhydric alcohol (a2), other polybasic acid (a3) and other polyhydric alcohol (a4), (B) a blocked polyisocyanate curing agent, and preferably (C) a water-dispersible blocked polyisocyanate curing agent.