| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for forming a multilayer composite coating on a base material. SOLUTION: The method includes a process in which an electrodeposited coating layer is formed on a base material by electrically depositing a hardenable and electrodepositable coating composition at least on a part of the base material. The coated base material is heated at a sufficient temperature for a sufficient period of time to harden the electrodeposited coating layer, if necessary. An undercoat layer is formed on the electrodeposited coating layer by directly depositing an aqueous hardenable undercoat composition at least on a part of the electrodeposited coating layer. The undercoat layer is dehydrated, if necessary. A top coating layer is formed on the undercoat layer by directly depositing a hardenable top coating composition, which substantially contains no pigment, at least on a part of the undercoat layer. The top coating layer and the undercoat layer, and, if necessary, the electrodeposited coating layer are simultaneously hardened. COPYRIGHT: (C)2009,JPO&INPIT
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