Kansai Paint Company, Ltd.

Tooru Fukuda

Toshiaki Nagano

Hideo Sugai

Koki Chiga

This invention provides a multilayer coating film-forming method which comprises applying a first clear paint onto a coating object, applying onto so formed first clear coating film which is either uncured or cured by heating, a second clear paint such that its heat-cured film thickness falls within a range of 2-15 &#x3bc;m, and forming the second clear coating film, (a) the first clear paint and second clear paint comprising hydroxyl-containing resin as the base resin and polyisocyanate compound as the crosslinking agent, and (b) when the coating film formed by applying a paint to a cured film thickness of 40 &#x3bc;m and curing it by heating at 140&#xb0; C. for 30 minutes is measured of its dynamic viscoelasticity at a frequency of 11 Hz, the first clear paint forming the first clear coating film having a glass transition temperature of lower than 70&#xb0; C. and tan&#x3b4; (=loss elastic modulus/storage elastic modulus) at 80&#xb0; C. of less than 0.4, and the second clear paint forming the second clear coating film having a glass transition temperature of at least 70&#xb0; C.

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Hiratsuka, Japan

Tooru Fukuda