Shikoku Research Institute Incorporated

Kansai Paint Company, Ltd.

Shuji Nishimori

Hideki Matsuda

Yoshimitsu Adachi

Tsuyoshi Miyashita

Hideki Otori

Masanori Akita

Makoto Kasuya

Provided is a coating composition capable of forming a coating film which exhibits excellent durability and is suitable for repair. It is a coating composition containing a resin component and a pigment, in which a linear expansion coefficient at a temperature equal to or less than a glass transition temperature of a nonvolatile component is 3.2&#xd7;10/K or less.

Coating composition, coating film, and coating method

The present invention provides an anticorrosion coating method for a galvanized steel structure, the method comprising applying an undercoating composition (I) to a cured thickness of 10 to 200 &#x3bc;m to a surface of a galvanized steel structure, and then applying thereto an overcoating composition (II) to a cured thickness of 100 to 1,500 &#x3bc;m; the undercoating composition (I) comprising an epoxy resin (A) having two or more epoxy groups per molecule, a specific amount of a resin (B) such as a urethane-modified epoxy resin, and an amine-based curing agent (C); the undercoating composition (I) having a shrinkage stress of 20 kg/cmor less when it is in the form of a 50 &#x3bc;m-thick cured coating film; and the overcoating composition (II) comprising an epoxy resin (D) having two or more epoxy groups per molecule, a specific amount of a flaky pigment (E), and an amine-based curing agent (F).

Anticorrosion coating method for zinc-plated steel structure

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Takamatsu, Japan

Shuji Nishimori