| 摘要 |
PROBLEM TO BE SOLVED: To provide a resin-coated, surface-treated steel sheet which is excellent in lubricity, alkali resistance, corrosion resistance, water resistance, adhesive properties, after-coating properties, and blocking resistance, has a colorless, transparent, good appearance, and indicates good corrosion resistance in a severe processing part. SOLUTION: In the resin-coated, surface-treated steel sheet having a resin membrane on the surface of a zinc-plated steel sheet or an aluminum-plated steel plate, the resin membrane is formed from a coating composition containing an emulsion resin of a mixture of a silica-modified acrylic emulsion resin and an acrylic emulsion resin, a solid lubricant, and a cyclic organic compound having a mercapto group. The acrylic emulsion resin is a core-shell type emulsion resin in which the Tg of the outermost shell part of a particle is higher than the Tg of the central part of the particle, and the amount of the adherent resin membrane is 0.5-8.0 g/m<SP>2</SP>. The coating composition can additionally contain 0.1-10 mass% of a phosphate and/or 0.1-10 mass% of a vanadate based on the total solid content of the composition. COPYRIGHT: (C)2006,JPO&NCIPI |
