| 摘要 |
PURPOSE:To enhance the chipping resistance and end surface rust-proof property of a paint film, by successively applying a carionic electrodeposition paint compounded with pigment at high concn., a corrosion-proof pigment-containing barrier coat, an intermediate cost and a super-hard top coat to a steel plate. CONSTITUTION:A cationic electrodeposition paint, wherein 40-150 pts.wt. of pigment is compounded with 100 pts.wt. of a resin solid, is applied to a steel plate. Next, a barrier coat based on a modified polyolefinic resin forming a paint film having static glass transition temp. of -30--60 deg.C and corrosion- proof pigment is applied to the surface of the electrodoposition paint film. Further, an intermediate coat is applied to the surface of the barrier coat film and, at last, a top coat forming a super-hard paint film excellent in finishing appearance and weatherablity and having good scratch resistance is applied.
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