| 摘要 |
PROBLEM TO BE SOLVED: To provide a method of forming a multi-layer coating film having a good finish appearance in the three-coat one-bake coating. SOLUTION: The method has a process of applying a cation electrodeposition coating composition to an article to be coated by electrodeposition and heat-hardening the electrodeposition coating composition to form a hardened electrodeposition coating film on the surface of the article, a process of applying an intermediate coating composition onto the electrodeposition coating film to form an unhardened intermediate coating film, a process of applying a top-coat base coating composition onto the unhardened intermediate coating film to form an unhardened top-coat base coating film, a process of applying a top-coat clear coating composition onto the unhardened top-coat base coating film to form an unhardened top-coat clear coating film and a process of baking the unhardened coating films to harden simultaneously. The hardened electrodeposition coating film has a center line average height Ra of the coarseness curve of 0.05-0.25μm and a center line average height Pa of the cross-section curve of 0.05-0.30μm. COPYRIGHT: (C)2005,JPO&NCIPI
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