Abstract: The present invention provides an aqueous coating composition comprising a carboxyl-containing, acrylic-modified polyester resin (B) neutralized and dispersed in an aqueous medium, the polyester resin (B) being obtainable by reacting a carboxyl-containing acrylic resin (c) with an epoxy-modified polyester resin (A) prepared by esterification of a carboxyl-containing polyester resin (a) having a number average molecular weight of 1,000 to 30,000 and an acid value of 5 to 200 mg KOH/g with a 1,2-epoxy-containing low-molecular-weight epoxy compound (b) having a number average molecular weight of 1,200 or less.

Abstract: The present invention provides a resin composition for coating, capable of forming a coating film excellent in electrodeposition property, coating surface smoothness and anticorrosivity in spite of small content of organic solvent and without containing a lead compound, and comprising a modified epoxy-polyamine resin (f), obtained by first reacting a diepoxide compound (a), wherein a specified amount of alkylene oxide has been introduced, and a bisphenol A type epoxy resin of an epoxy equivalent 170-500 with a bisphenol (b), reacting the epoxy resin (c) thus obtained with a cyclic ester (d), and further reacting the modified epoxy resin (e) thus obtained with an amine compound having active hydrogen.

Abstract: The present invention provides a resin composition for coating, capable of forming a coating film excellent in electrodeposition property, coating surface smoothness and anticorrosivity in spite of small content of organic solvent and without containing a lead compound, and comprising a modified epoxy-polyamine resin (f), obtained by first reacting a diepoxide compound (a), wherein a specified amount of alkylene oxide has been introduced, and a bisphenol A type epoxy resin of an epoxy equivalent 170-500 with a bisphenol (b), reacting the epoxy resin (c) thus obtained with a cyclic ester (d), and further reacting the modified epoxy resin (e) thus obtained with an amine compound having active hydrogen.

Abstract: The present invention provides an aqueous coating composition for the inner surface of a can, comprising a carboxyl-containing, acrylic-modified epoxy resin (C) prepared by reacting a high-molecular-weight epoxy resin (A) that has a number average molecular weight of 3,000 to 30,000 and is a reaction product of a specific low-molecular-weight cresol novolac epoxy resin (a) and a specific low-molecular-weight cresol novolac phenol resin (b), with a carboxyl-containing acrylic resin (B); the carboxyl-containing, acrylic-modified epoxy resin (C) being neutralized and dispersed in an aqueous medium.

Abstract: This invention relates to cationic electro-coating composition which comprises blending which an aqueous dispersion or an aqueous dispersion paste which contains an organic acid-modified bismuth compound in a non-water-soluble state, and which is obtained by mixing and grinding a bismuth compound and an organic acid in an aqueous medium. Said cationic electro-coating composition, although containing no lead compounds, is capable of forming an electrocoated film which is excellent in corrosion resistance, appearance, etc.

Abstract: The present invention provides a coating composition comprising: an epoxy resin (C) having a number average molecular weight of 2,500 to 30,000 and an epoxy equivalent of 1,500 to 20,000 g/equiv., and obtainable by reacting a specific low-molecular-weight novolak epoxy resin (A) with a specific low-molecular-weight novolak phenol resin (B); or a neutralized product of a carboxyl-containing acrylic-modified epoxy resin (H) obtainable by reacting the epoxy resin (C) with a carboxyl-containing acrylic resin (G). Also provided is a method for coating the inner surface of a can using the coating composition.

Abstract: The present invention provides a resin composition for coating, capable of forming a coating film excellent in electrodeposition property, coating surface smoothness and anticorrosivity in spite of small content of organic solvent and without containing a lead compound, and comprising a modified epoxy-polyamine resin (f), obtained by first reacting a diepoxide compound (a), wherein a specified amount of alkylene oxide has been introduced, and a bisphenol A type epoxy resin of an epoxy equivalent 170-500 with a bisphenol (b), reacting the epoxy resin (c) thus obtained with a cyclic ester (d), and further reacting the modified epoxy resin (e) thus obtained with an amine compound having active hydrogen.

Abstract: The present invention provides an aqueous coating composition comprising a carboxyl-containing, acrylic-modified polyester resin (B) neutralized and dispersed in an aqueous medium, the polyester resin (B) being obtainable by reacting a carboxyl-containing acrylic resin (c) with an epoxy-modified polyester resin (A) prepared by esterification of a carboxyl-containing polyester resin (a) having a number average molecular weight of 1,000 to 30,000 and an acid value of 5 to 200 mg KOH/g with a 1,2-epoxy-containing low-molecular-weight epoxy compound (b) having a number average molecular weight of 1,200 or less.

Abstract: The present invention provides a resin composition for coating, capable of forming a coating film excellent in electrodeposition property, coating surface smoothness and anticorrosivity in spite of small content of organic solvent and without containing a lead compound, and comprising a modified epoxy-polyamine resin (i), obtained by first reacting a diepoxide compound (a), wherein a specified amount of alkylene oxide has been introduced, and a bisphenol A type epoxy resin of an epoxy equivalent 170-500 with a bisphenol (b), reacting the epoxy resin (c) thus obtained with a cyclic ester (d), and further reacting the modified epoxy resin (e) thus obtained with an amine compound having active hydrogen.

Abstract: There is disclosed a cationic electrodeposition coating composition containing bismuth lactate derived from a lactic acid, whose L-isomer content is at least 80% by weight, or bismuth methoxyacetate in a form of being dissolved in an aqueous medium. The electrodeposition coating composition can form a coating film having excellent anticorrosivity and finishing property without containing a lead compound.

Abstract: A self-curing cationically electrodepositable resin useful as a paint composition having in the molecule:(1) a primary hydroxyl group,(2) a cationic group, and(3) at least one epoxy group-containing functional group represented by the following structural formulas (I) and (II): ##STR1## The electrodepositable resin is obtained by the reaction of an epoxy resin with at least three epoxy group-containing functional groups of structural formulas (I) and (II), a cationizing agent such as amino compounds, and a compound having at least one phenolic hydroxyl group per molecule.

Abstract: A resin composition for a cationically electrodepositable paint comprising(A) a resin having hydroxyl groups and cationic groups,(B) an epoxy resin having at least 2 epoxy functional groups each of which comprises an epoxy group directly bound to an alicyclic ring and/or bridged alicyclic ring on average per molecule, and(C) a finely divided gelled polymer as principal components, wherein said finely divided gelled polymer is obtained by emulsion polymerizing(C-1) a polymerizable monomer containing at least two radically polymerizable unsaturated groups in the molecule, and(C-2) a radically polymerizable unsaturated monomer other than the one mentioned in (C-1), abovein the presence of a reactive emulsifier containing an allyl group in the molecule.

Abstract: A resin composition for a cationically electrodepositable paint comprising(A) a resin having hydroxyl groups and cationic groups such as tertiary amino groups prepared from the reaction product of a polyepoxide compound and an secondary amine having hydroxyl group(s), and(B) an epoxy resin having at least 2 epoxy functional groups each of which comprises an epoxy group directly bound to an alicyclic ring and/or bridged alicyclic ring on average per molecule.

Abstract: A thermosetting coating composition comprising as essential components:(a) a hydroxyl group-containing base resin,(b) an alicyclic polyepoxide crosslinking agent, and(c) a catalyst selected from the group consisting of a quaternary ammonium hydroxide and a metal chelate.

Abstract: An article coated with a cationically electrodepositable paint composition comprises (A) a resin having hydroxyl and cationic groups, (B) an epoxy resin having at least 2 epoxy groups, each directly bound to an alicyclic ring, and (C) lead hydroxide and/or lead maleate as curing catalyst(s).

Abstract: A resin composition for cationically electro-depositable paint comprising (A) a base resin containing a primary hydroxyl group and a cationic group and (B) a crosslinking agent, said crosslinking agent (B) being a product obtained by reacting (B-1) a compound containing in a molecule one hydroxyl group and at least one alicyclic epoxy group with (B-2) a polyisocyanate compound selected from aliphatic, alicyclic and aromatic-aliphatic polyisocyanates such that in principle, a free isocyanate group substantially does not remain.

Abstract: A resin composition for cationically electrodepositable paint comprising, as principal components, (A) a resin containing a hydroxyl group and a cationic group, (B) an epoxy resin containing, per molecule, on the average at least 2 epoxy group-containing functional groups with an epoxy group bound to an alicyclic skeleton and/or a bridged alicyclic skeleton, and (C) a finely divided gelled polymer, said finely divided gelled polymer (C) being obtained by, in the first step, emulsion polymerizing (I) a monomer component composed of(a) a polymerizable unsaturated vinylsilane monomer containing a vinylic double bond and a hydrolyzable alkoxysilane group,(b) a polymerizable monomer containing at least two radically polymerizable unsaturated groups in a molecule,(c) a polymerizable unsaturated monomer containing a vinylic double bond and a hydroxyl group, and(d) the other polymerizable unsaturated monomer using a cationic reactive emulsifying agent containing an allyl group in a molecule; and in the second step, e

Abstract: A cationically electrodepositable resin composition containing as main component primary hydroxyl group-containing cationic resin obtained by reacting epoxy resin (A) having at least three epoxy group-containing functional groups represented by the following structural formula (I) ##STR1## with primary or secondary amine compound (B) containing primary hydroxyl group and optionally, further phenol compound (C) having at least one phenolic hydroxyl group in one molecule, as well as a cationically electrodepositable paint composition containing as main components said cationic resin and curing agent.

Abstract: A cationically electrodepositable resin composition containing as main component primary hydroxyl group-containing cationic resin obtained by reacting epoxy resin (A) having at least three epoxy group-containing functional groups represented by the following structural formula (I) ##STR1## with primary or secondary amine compound (B) containing primary hydroxyl group and optionally, further phenol compound (C) having at least one phenolic hydroxyl group in one molecule, as well as a cationically electrodepositable paint composition containing as main components said cationic resin and curing agent.

Abstract: A cationically electrodepositable paint composition comprises (A) a resin having hydroxyl groups and cationic groups, (B) an epoxy resin having at least two epoxy groups, each directly bound to a (bridged) alicyclic ring, and (C) lead hydroxide and/or lead maleate as curing catalyst(s).