Kansai Paint Company, Ltd.

Hidefumi Takanashi

Yugen Kawamoto

Kazuhiko Ohnishi

The present invention provide a method for color matching of a thermosetting powder coating composition, the method comprising the steps of: (1) dryblending two or more kinds of starting colored thermosetting powder coating compositions of different colors having an average particle size of 20 &mgr;m or less to achieve color matching, and (2) granulating the dryblend to a particle size in the range suitable for powder coating, by heating and agitating the dryblend, or by adding a specific solid binder, or by grinding and classifying a sheet or grains formed by compressing the dryblend. According to the present invention, color matching can be easily made, and a color-matched powder coating composition is obtained which is excellent in application characteristics, finished appearance and film properties.

Method for color matching of powder coating composition

This invention provides a method for color matching of a thermosetting powder coating composition, the method comprising the steps of: dryblending two or more kinds of starting colored thermosetting powder coating compositions of different colors having an average particle size of 10 &mgr;m or less to achieve color matching, and granulating the dryblend to a particle size in the range which is suitable for coating, by adding at least one binder selected from the group consisting of an aqueous solution of polyethylene glycol and an aqueous dispersion of paraffin wax; and a production process therefor. According to the present invention, color matching can be easily made, and a film of the obtained color-matched powder coating composition is excellent in finished appearance and outstanding in properties.

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Hiratsuka, Japan

Hidefumi Takanashi