Abstract: 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.

Abstract: This invention offers a method for forming multilayer coating film by successively applying onto a coating object a water-based first coloring paint, water-based second coloring paint and clear paint, and simultaneously baking the resultant first coloring coating film, second coloring coating film and clear coating film, in which the water-based first coloring paint (A) comprises polyester resin and curing agent, the polyester resin containing benzene ring and cyclohexane ring in its molecules, their combined content in the polyester resin being within a range of 1.0-2.2 mols/kg (solid resin content); and that the curing agent is at least one compound selected from the group consisting of isocyanate group-containing compound, oxazoline group-containing compound, carbodiimide group-containing compound, hydrazide group-containing compound and semicarbazide group-containing compound.

Abstract: The present invention provides an aqueous intermediate coating composition comprising: (A) a resin containing hydroxyl and carboxyl groups with a hydroxyl value of 100 to 200 mg KOH/g and an acid value of 20 to 50 mg KOH/g; (B) at least one curing agent selected from the group consisting of melamine resins and blocked polyisocyanate compounds; and (C) flat pigment particles; the molecular weight distribution of a curable resin component comprising component (A) and component (B) including from 30 to 50% by weight of a component with a molecular weight of less than 1,000, and 10% by weight or less of a component with a molecular weight exceeding 100,000; the proportion of component (C) being from 2 to 15 parts by weight based on 100 parts by weight of the resin component; and when the intermediate coating composition is applied to an undercoating film, pre-dried at 100° C. for 30 minutes and then heat-cured at 145° C.

Abstract: The present invention provides an aqueous intermediate coating composition comprising: (A) a resin containing hydroxyl and carboxyl groups with a hydroxyl value of 100 to 200 mg KOH/g and an acid value of 20 to 50 mg KOH/g; (B) at least one curing agent selected from the group consisting of melamine resins and blocked polyisocyanate compounds; and (C) flat pigment particles; the molecular weight distribution of a curable resin component comprising component (A) and component (B) including from 30 to 50% by weight of a component with a molecular weight of less than 1,000, and 10% by weight or less of a component with a molecular weight exceeding 100,000; the proportion of component (C) being from 2 to 15 parts by weight based on 100 parts by weight of the resin component; and when the intermediate coating composition is applied to an undercoating film, pre-dried at 100° C. for 30 minutes and then heat-cured at 145° C.

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: This invention offers a method for forming multilayer coating film by successively applying onto a coating object a water-based first coloring paint, water-based second coloring paint and clear paint, and simultaneously baking the resultant first coloring coating film, second coloring coating film and clear coating film, in which the water-based first coloring paint (A) comprises polyester resin and curing agent, the polyester resin containing benzene ring and cyclohexane ring in its molecules, their combined content in the polyester resin being within a range of 1.0-2.2 mols/kg (solid resin content); and that the curing agent is at least one compound selected from the group consisting of isocyanate group-containing compound, oxazoline group-containing compound, carbodiimide group-containing compound, hydrazide group-containing compound and semicarbazide group-containing compound.

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: The present invention provides a method for improving the smoothness of a film formed from a thermosetting liquid coating composition, comprising making adjustments in the application and heat curing of the coating composition onto a substrate, in such a manner that, at a temperature at which the thermal fluidity of the film reaches a maximum before the start of the curing reaction, the film has a storage modulus G′ of about 0.5 to about 20 Pa at a stress of 0.5 Pa and a frequency of 0.1 Hz, a loss modulus G″ of about 1.0 to about 20 Pa at a stress of 0.5 Pa and a frequency of 0.1 Hz, and a ratio of the storage modulus G′ to the loss modulus G″ (G′/G″) of about 0.3 to about 1.0.

Abstract: The present invention provides a method for improving the smoothness of a film formed from a thermosetting liquid coating composition, comprising making adjustments in the application and heat curing of the coating composition onto a substrate, in such a manner that, at a temperature at which the thermal fluidity of the film reaches a maximum before the start of the curing reaction, the film has a storage modulus G′ of about 0.5 to about 20 Pa at a stress of 0.5 Pa and a frequency of 0.1 Hz, a loss modulus G″ of about 1.0 to about 20 Pa at a stress of 0.5 Pa and a frequency of 0.1 Hz, and a ratio of the storage modulus G′ to the loss modulus G″ (G′/G″) of about 0.3 to about 1.0.

Abstract: The present invention provides an aqueous solder resist composition comprising: (a) A water-soluble or water-dispersible, photopolymerizable resin containing at least one polymerizable unsaturated group and at least one carboxyl group, the carboxyl group being neutralized with an amine compound, (b) a photoinitiator, (c) an amino resin, and (d) a low reactivity epoxy compound free of an epoxy group represented by the formula  wherein Y is oxygen or nitrogen.

Abstract: A photopolymerizable composition suitable as a solder resist and capable of forming a resist film having characteristics in no way inferior to those of the conventional heat-curable type or organic solvent developed type solder resist, with the use of water or a dilute aqueous solution which is completely innocuous and higher in safety than the aqueous alkaline solution, and a method for producing a cured coated film pattern using the photopolymerizable composition.