A method for forming a multilayer coated film on an electrodeposition-coated alloyed hot-dip galvanized steel plate include step (1) of applying an aqueous intermediate coating composition (X), step (2) of applying an aqueous base coating composition (Y), step (3) of applying a clear coating composition (Z) containing an epoxide, and step (4) of heat-curing each coated film. The coating composition (X) contains a hydroxyl group-containing acrylic resin (A), a polyurethane resin (B), a hydroxyl group-containing polyester resin (C), a melamine resin (D), and an active methylene-blocked polyisocyanate compound (E). The ratio of (A) to (B) is controlled to a specific range, and an elongation at break, Young's modulus and Tukon hardness of the coated film of the coating composition (X) are controlled to specific ranges.

Disclosed is a method for forming a multilayer coating film, including applying a first and second aqueous base coat, and a clear coat to an object, and thereafter simultaneously heating and curing the three-layer coating film. The first aqueous base coat includes a water-soluble or water-dispersible polyurethane resin having a glass transition temperature of 20 C. or below and a weight average molecular weight of 30,000 to 500,000, and a crosslinkable resin having a weight average molecular weight of 600 or more. The first aqueous base coat-coated film has a breaking strength of 2050 N/cm2 or more and a loss tangent (tan ) at 20 C. of 0.075 or more. The migration amount of a melamine resin from the second aqueous base coat-coated film layer to the first aqueous base coat-coated film layer is within 3% by mass of a total resin solid content of the first aqueous base coat.

A method of forming a multilayer coating on a substrate is provided. The multilayer coating exhibits reduced strike-in and mottling. The method includes the steps of providing the substrate including a primer disposed thereon, applying a basecoat composition on the primer, applying a clearcoat composition on the basecoat composition, and curing the basecoat composition and the clearcoat composition to form the multilayer coating on the substrate. The basecoat composition includes a film forming resin, a pigment, and about 5% to about 75% by weight on binder of a cyclic lactone modified branched acrylic polymer having a hydroxyl monomer content of about 1% to 65% by weight, all or part of which has been reacted with a cyclic lactone, and having a weight average molecular weight (Mw) of about 10,000 to about 150,000 g/mol.

A method for forming a multilayer coating film is provided. The method includes coating at least one object with an aqueous primer coating composition, an aqueous first colored coating composition, an aqueous second colored coating composition, and a clear coating composition, in that order. The aqueous primer coating composition contains a component (A) which contains a polyolefin resin, a component (B) which contains a polyurethane resin, a curing agent (C) and electrically conductive carbon (D). The aqueous first colored coating composition and aqueous second colored coating composition each contain a core/shell emulsion. The clear coating composition contains a hydroxyl group-containing acrylic resin, a polyisocyanate and a melamine resin. The method improves the appearance, chipping resistance, adhesive properties and low temperature impact properties of a coating film.

An object is to provide an aqueous coating material composition having high viscosity expression property as well as a viscosity property of decreasing viscosity with increase in shear velocity; in particular, to provide an aqueous coating material composition that can form a multilayer coating film having excellent smoothness, clarity, flip-flop property, adhesion, and water resistance; in addition, to provide a method for forming a multilayer coating film using such aqueous coating material composition, as well as a coated article that has been coated with such aqueous coating material composition. As a solution, an aqueous coating material composition is provided that contains a polyester resin (A), acrylic resin particles (B), a curing agent (C), and a coloring pigment (D), wherein the polyester resin (A) is a resin containing a trifunctional or higher polyfunctional polycarboxylic acid (a1) and a polyol (a2) as monomer components.

A method for forming a multilayer coated film on an electrodeposition-coated alloyed hot-dip galvanized steel plate include step (1) of applying an aqueous intermediate coating composition (X), step (2) of applying an aqueous base coating composition (Y), step (3) of applying a clear coating composition (Z) containing an epoxide, and step (4) of heat-curing each coated film. The coating composition (X) contains a hydroxyl group-containing acrylic resin (A), a polyurethane resin (B), a hydroxyl group-containing polyester resin (C), a melamine resin (D), and an active methylene-blocked polyisocyanate compound (E). The ratio of (A) to (B) is controlled to a specific range, and an elongation at break, Young's modulus and Tukon hardness of the coated film of the coating composition (X) are controlled to specific ranges.

This disclosure is directed to a multilayered laminate, comprising (a) a support substrate having at least one releasable major surface; (b) a transparent overcoat formed of a first coating composition on the releasable major surface of the support substrate, wherein the first coating composition comprises an aqueous polymer dispersion having a particle size in the range of 30 to 400 nm; (c) a stone-like topcoat system on the transparent overcoat, wherein the stone-like topcoat system comprises a multicolored spot layer and a background color layer; (d) an adhesive primer coat formed of a second coating composition on the stone-like topcoat system, wherein the second coating composition comprises an aqueous polymer dispersion selected from aqueous acrylic dispersions, aqueous organic silicone dispersions and aqueous vinyl acetate dispersions, wherein the transparent overcoat in the multilayered laminate, when released from the support substrate, a gloss of at least 60% at 60.

A coating method for forming a laminated coating film including: preparing a thermosetting coating material as a lower layer-coating material, an intermediate layer-coating material, and as an upper layer-coating material; forming an uncured laminated coating film by applying the lower layer-coating, the intermediate layer-coating, and the upper layer-coating materials on the base material using a wet-on-wet technique; and simultaneously curing the lower layer-coating, the intermediate layer-coating, and upper layer-coating materials by baking the uncured laminated coating film. In the preparation step, the lower layer-coating, the intermediate layer-coating, and the upper layer-coating materials are selected so a sum of an absolute value of a difference in shrinkage ratio between the lower layer-coating and the intermediate layer-coating materials and an absolute value of a difference in shrinkage ratio between the intermediate layer-coating and the upper layer-coating materials at the late stage of the baking is 3.0% or smaller.

The present disclosure is to provide a laminated film for decorating a three-dimensional molded product by vacuum forming which has a crack and strain-free uneven design on the clear coating film layer being an outermost layer at the time of use and provide a good design property to a molded product.

A laminated film for decorating a three-dimensional molded product by vacuum forming, having a base material film layer (A), a clear coating film layer (B), and a design layer (C), wherein at least one face of the base material film layer (A) bordering the clear coating film layer (B) has an uneven design.

A method of forming a multilayer coating on a substrate is provided. The multilayer coating exhibits reduced strike-in and mottling. The method includes the steps of providing the substrate including a primer disposed thereon, applying a basecoat composition on the primer, applying a clearcoat composition on the basecoat composition, and curing the basecoat composition and the clearcoat composition to form the multilayer coating on the substrate. The basecoat composition includes a film forming resin, a pigment, and about 5% to about 75% by weight on binder of a cyclic lactone modified branched acrylic polymer having a hydroxyl monomer content of about 1% to 65% by weight, all or part of which has been reacted with a cyclic lactone, and having a weight average molecular weight (Mw) of about 10,000 to about 150,000 g/mol.