Abstract: The present invention provides a cationic coating composition capable of forming a coating film which is excellent in an electrodepositablly coating property and an adhesive property toward a rust preventive steel plate, a corrosion resistance and a low temperature curability. The cationic coating composition described above comprises as a vehicle component, a xylene-formaldehyde resin-modified, amino group-containing epoxy resin obtained by reacting an epoxy resin (A) having an epoxy equivalent of 180 to 2500 with a xylene-formaldehyde resin (B) and an amino group-containing compound (C).

Abstract: It is an object of the present invention to provide an electrodeposition coating composition excellent in corrosion resistance and stability of the coating. The electrodeposition coating composition comprises, based on 100 parts by weight (solid basis) of a core resin and a hardener constituting an electrodeposition coating, 1 to 100 parts by weight of (a) a zinc powder dispersed by a phosphoric-acid-group-containing dispersing resin.

Abstract: The present invention provides a cationic paint composition containing as resin component a polyol-modified amino group-containing epoxy resin obtained by reacting an epoxy resin with epoxy equivalent 180-2500 with a alkyl phenol and/or a carboxylic acid; a polyol obtained by adding a caprolactone to a compound containing a plurality of active hydrogen groups and an amino group-containing compound.

Abstract: A multi-layer electrodeposition coating film-forming method which comprises subjecting a cationic electrodeposition coating composition containing at least two emulsions to an electrodeposition coating, said cationic electrodeposition coating composition being such that a difference in an electrical quantity (a) required for deposition starting between a first coating composition comprising a first emulsion and a second coating composition comprising a second emulsion in two emulsions selected from the at least two emulsions is in the range of 50 to 400 C/m2.

Abstract: The present invention provides a plastic-coated metal plate prepared by sticking a plastic layer on one face or both faces of a metal plate via a coating film of a thermosetting adhesive comprising an amine-added epoxy resin (A) and a polyisocyanate compound (B), which is excellent in a corrosion resistance, an adhesive property and a finishing property and which is particularly useful for forming a car body.

Abstract: A method for forming an electrodeposition coating film, comprises a step of subjecting a steric metal article to be coated to electrodeposition coating, and a step of selectively heating/drying the resultant coating film by a plurality of induction heating devices.

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: This invention provides, at a low cost, a low-pollution type cationic electro-coating bath composition which contains neither lead nor chromium, and which comprises cationic electrodeposition paint and, contained therein, a bismuth oxide paste, the amount of the bismuth oxide paste being within a range of 0.1 to 0.3% by weight as metal bismuth on the basis of total solid content of said cationic electro-coating bath composition, and the bismuth oxide paste being prepared by dispersing bismuth oxide (B) in an organic acid-neutralized aqueous dispersion of diethanol amine-added alicyclic epoxy resin (A).

Abstract: According to the present invention, provided is a cationically electrodepositable coating material comprising a resin for a cationically electrodepositable coating material, a hydrotalcite-like solid solution having a specific composition and, if necessary, a basic bismuth compound and/or an organic acid salt thereof. Such cationically electrodepositable coating material forms a coating film which is excellent in performances such as an edge corrosion-preventive property, a throwing power, a chemical resistance and a smoothness without adding harmful substances such as lead compounds and chromium compound.

Abstract: A coating film-forming method that includes a first step that involves coating a cationic electrodeposition coating composition (A) containing an electrically conducting agent, followed by washing with water and heat curing and drying to form a cured cationic electrodeposition coating film. A second step that involves coating such an anionic electrodeposition coating composition (B). The coating film formed therefrom has a chromatic color or a white color as an achromatic color onto the cured cationic electrodeposition coating film. This is followed by washing with water, and removing water by preheating or air blowing to form a non-cured anionic electrodeposition coating film. A third step that involves coating a topcoating composition (C) thereonto to form a non-cured topcoating film, and heat curing and drying a resulting laminated coating film simultaneously.

Abstract: The present invention provides a cationic coating composition capable of forming a coating film which is excellent in an electrodepositablly coating property and an adhesive property toward a rust preventive steel plate, a corrosion resistance and a low temperature curability. The cationic coating composition described above comprises as a vehicle component, a xylene-formaldehyde resin-modified, amino group-containing epoxy resin obtained by reacting an epoxy resin (A) having an epoxy equivalent of 180 to 2500 with a xylene-formaldehyde resin (B) and an amino group-containing compound (C).

Abstract: According to the present invention, provided is a coated metal plate characterized by comprising a metal plate and laminated at least on one surface of a metal plate, a conductive plastic coated film and an electrodeposition coated film, which is useful as an outer plate part for car bodies and electrical appliances.

Abstract: The present invention provides a plastic-coated metal plate for an automobile exterior plate which is a laminate metal plate coated on both faces or one face of the metal plate with a plastic layer, wherein the plastic layer has a surface tension of at least 30 mN/m, an elongation percentage of at least 30% at a tensile rate of 20 mm/minute/20° C. and a rupture strength of at least 600 kg/cm2 at a tensile rate of 20 mm/minute/20° C., and a part for a major external face side in a car body, wherein the above plastic-coated metal plate is cut, molded and joined to form the part for a major external face side in a car body, and a metal-exposed part thereof is coated by electrodeposition.

Abstract: The present invention provides a plastic-coated metal plate for an automobile exterior plate which is a laminate metal plate coated on both faces or one face of the metal plate with a plastic layer, wherein the plastic layer has a surface tension of at least 30 mN/m, an elongation percentage of at least 30% at a tensile rate of 20 mm/minute/20° C. and a rupture strength of at least 600 kg/cm2 at a tensile rate of 20 mm/minute/20° C., and a part for a major external face side in a car body, wherein the above plastic-coated metal plate is cut, molded and joined to form the part for a major external face side in a car body, and a metal-exposed part thereof is coated by electrodeposition.

Abstract: This invention provides a car body coating process wherein the metal-exposed portion of a shell body, a part or whole of which has been made of plastics-covered metal plates, is electrocoated with use of an electrodeposition paint which contains no coloring pigment and has a bath solid content of at most 10% by weight and which is capable of forming a clear coating film.

Abstract: The present invention provides a cationic coating composition capable of forming a coating film which is excellent in a corrosion resistance and an adhesive property and an electrodepositably coating property toward a rust preventive steel plate (zinc-plated steel plate). The cationic coating composition described above comprises as a vehicle component, a polyol-modified, amino group-containing epoxy resin prepared by reacting an epoxy resin (A) having an epoxy equivalent of 180 to 2500 with a polyol compound (B) obtained by adding caprolactone to a compound having plural active hydrogen groups and an amino group-containing compound (C).

Abstract: This invention provides, at a low cost, a low-pollution type cationic electro-coating bath composition which contains neither lead nor chromium, and which comprises cationic electrodeposition paint and, contained therein, a bismuth oxide paste, the amount of the bismuth oxide paste being within a range of 0.1 to 0.3% by weight as metal bismuth on the basis of total solid content of said cationic electro-coating bath composition, and the bismuth oxide paste being prepared by dispersing bismuth oxide (B) in an organic acid-neutralized aqueous dispersion of diethanol amine-added alicyclic epoxy resin (A).

Abstract: The present invention provides a cationic resin composition capable of forming a cationically electrodepositable coating film which is excellent in corrosion resistance, an aptitude for the cationic electrodepositable coating of a rust preventive steel plate and in adhesion to substrate, which cationic resin composition is characterized by comprising the following components: (A) an amino group-containing epoxy resin which is prepared by adding an amino group-containing compound to an epoxy resin having an epoxy equivalent of 400 to 3000, (B) a polyol-modified amino group-containing epoxy resin which is prepared by making an epoxy resin having an epoxy equivalent of 180 to 2500 react with an amino group-containing compound and with a polyol compound obtained by adding caprolactone to a compound having plural active hydrogen groups, and (C) a blocked polyisocyanate curing agent, component (A) being 40 to 70% by weight, component (B) being 4 to 40% by weight, and component (C) being 10 to 40% by weight, base

Abstract: This invention provides a car body coating process wherein the metal-exposed portion of a shell body, a part or whole of which has been made of plastics-covered metal plates, is electrocoated with use of an electrodeposition paint which contains no coloring pigment and has a bath solid content of at most 10% by weight and which is capable of forming a clear coating film.

Abstract: The present invention provides a plastic-coated metal plate for an automobile exterior plate which is a laminate metal plate coated on both faces or one face of the metal plate with a plastic layer, wherein the plastic layer has a surface tension of at least 30 mN/m, an elongation percentage of at least 30% at a tensile rate of 20 mm/minute/20° C. and a rupture strength of at least 600 kg/cm2 at a tensile rate of 20 mm/minute/20° C., and a part for a major external face side in a car body, wherein the above plastic-coated metal plate is cut, molded and joined to form the part for a major external face side in a car body, and a metal-exposed part thereof is coated by electrodeposition.