Kansai Paint Company, Ltd.

Toyota Jidosha Kabushiki Kaisha

Minoru Hanatani

Koji Kamikado

Hideki Iijima

Akihiko Shimasaki

Eisaku Okada

Motohide Mori

Takeo Yamaguchi

Hirokazu Hayashi

Masahiro Nakamura

Shigetaka Setodoi

An object of the present invention is to find a cationic electrodeposition coating composition excellent in throwing power, anti-GA gas pinhole properties, and anti-corrosion properties, and to provide a coated article excellent in these coating film properties. The present invention provides a cationic electrodeposition coating composition containing an amino-containing epoxy resin (A), a blocked polyisocyanate curing agent (B), and a pigment (C), the amino-containing epoxy resin (A) being obtained by reacting an epoxy resin (A1), a polyphenol compound (A2), a dimer acid diglycidyl ester (A3), and an amine compound (A4).

Cationic electrodeposition coating composition

This invention concerns a method for forming a coating film on a metallic substrate by a multistage energization method at no less than two stages using an electrodeposition bath which comprises a water-based film-forming agent comprising zirconium compound and, as the base resin, an amino group-containing modified epoxy resin which is obtained through reaction of an epoxy resin with an amino group-containing compound, said epoxy resin having been obtained through reaction of a diepoxide compound, a bisphenol epoxy resin and bisphenols; whereby coated articles excelling in corrosion resistance are offered.

Method for forming coating film

A coating film-forming method, which method comprises coating a cationic electrodeposition coating composition onto a substrate, followed by heat curing to form a cured electrodeposition coating film, said cationic electrodeposition coating composition containing a base resin consisting of an amine-added epoxy resin (A) obtained by reacting an epoxy resin (a) with at least one modifying agent selected from the group consisting of a polyhydric polyol (a), an epoxy compound (a) of the polyhydric polyol and a cyclic ester compound (a), a polyphenol compound (a) and an amino group-containing compound (a), and a curing agent consisting of a blocked polyisocyanate curing agent (B) obtained by reacting at least one polyisocyanate compound (b) selected from the group consisting of an aromatic polyisocyanate compound and an alicyclic polyisocyanate compound with at least one blocking agent (b) selected from the group consisting of an oxime compound, aliphatic alcohols, aromatic alkyl alcohols and ether alcohols.

Coating film-forming method

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Aichi, Japan

Minoru Hanatani