| 摘要 |
PROBLEM TO BE SOLVED: To provide a method of forming a multilayered coating film by which a coating film exhibiting excellent chipping resistance, impact resistance and appearance is formed in a 3-wet coating system aiming the reduction of coating process, cost saving and the decrease of environmental load. SOLUTION: In the multilayered coating film forming method composed of a process (1) of applying a water based intermediate coating material to form an uncured intermediate coating film on a material to be coated on which an electrodeposition coating film is formed, a process (2) of applying a water based base coating material to form an uncured base coating film, a process (3) of applying a clear coating material to form an uncured clear coating lime and a process (4) of heating and curing the intermediate coating film, the base coating film and the clear coating film simultaneously to form the multilayered coating film, a coating film obtained by applying the water based intermediate coating material on a polypropylene-made test plate and baking in a state of a single film has the stress-strain characteristic of≤27,000 kg/cm<SP>2</SP>Young's modulus and≥4.2% elongation measured at 20°C. COPYRIGHT: (C)2003,JPO
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