发明名称 |
PRECOATED STEEL SHEET AND METHOD FOR PRODUCING SAME |
摘要 |
<p>The main purpose of the present invention is to provide a low-cost white precoated steel sheet which has excellent degree of whiteness, adhesion, chemical resistance and corrosion resistance. The present invention is a precoated steel sheet which has a zinc-based plating layer and a chemical conversion coating film on at least one surface of a steel sheet. The chemical conversion coating film does not contain titanium oxide and a chromium compound. The precoated steel sheet additionally comprises only a single layer of a white coating film that is formed on the chemical conversion coating film and contains titanium oxide, a rust preventive pigment, a polyester resin and an epoxy resin. The titanium oxide is contained in the white coating film in an amount of 30-60% by mass, and the rust preventive pigment is composed of a calcium-modified silica. The calcium-modified silica is contained in the white coating film in an amount of 0.5-10% by mass. The epoxy resin is contained in the white coating film in an amount of 0.5-5% by mass, and the white coating film has a film thickness of 8-24μm.</p> |
申请公布号 |
WO2014175420(A1) |
申请公布日期 |
2014.10.30 |
申请号 |
WO2014JP61686 |
申请日期 |
2014.04.25 |
申请人 |
NIPPON STEEL & SUMITOMO METAL CORPORATION |
发明人 |
SHIBAO, FUMIO;INOUE, IKUYA;KOURA, NORITAKE |
分类号 |
B32B15/08;B05D7/14;B05D7/24;C23C28/00 |
主分类号 |
B32B15/08 |
代理机构 |
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