Kansai Paint Company, Ltd.

Masanobu Kudoh

Hidehiko Haneishi

Koji Kamikado

Akimasa Nakahata

Masafumi Kume

Masaru Mitsuji

Tadayoshi Tatsuno

Toshio Ohkoshi

Takahisa Kasukawa

Kyoichi Horibe

The present invention provides a cationic electrodepositable coating composition comprising:

Cationic electrodepositable coating composition and coating method using

An aqueous resin dispersion which comprises as the chief component acrylic-modified epoxy-polyamine resin composed of a bisphenolic epoxy resin containing at least two epoxy groups per molecule; and, as bound to at least a part of said epoxy groups, an acrylic resin having on the average at least one functional group which is capable of reacting with said epoxy group, per molecule, the molecular weight distribution of said acrylic resin as expressed by its weight average molecular weight (Mw)/number average molecular weight (Mn) being within a range of 1 to 1.2, and an active hydrogen-containing amino compound. Said aqueous resin dispersion may further optionally contain non-ionic, film-forming resin. Such dispersions are useful for cationic electrodeposition paint which can form a coating excelling in weatherability and corrosion resistance.

Acrylic resin-modified epoxy-polyamine composition

Aqueous resin dispersion containing an epoxy resin, an amine and an

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Hiratsuka, Japan

Masanobu Kudoh