Organic composite coated steel sheet and a process for manufacturing the
same
    33.
    发明授权
    Organic composite coated steel sheet and a process for manufacturing the same 失效
    有机复合涂层钢板及其制造方法

    公开(公告)号:US5429880A

    公开(公告)日:1995-07-04

    申请号:US988947

    申请日:1993-03-09

    摘要: An organic composite coated steel sheet having a high cosmetic corrosion resistance and excellent image clarity which is desired on, for example, the outside of an outer plate forming an automobile body. The steel sheet has a chromate layer formed on the surface of a zinc or a zinc alloy plate steel sheet, and containing a specific weight of chromium, and an organic resin film formed on the chromate layer from a mixture in specific proportions of a blocked urethane-modified epoxy resin and a rust-preventing additive, and having a thickness of 0.2 to 2 microns. The resin is a mixture in specific proportions of a modified epoxy resin (A) which consists of an epoxy resin and a polyfunctional amine, and may further contain a monoisocyanate, or phosphoric acid, and a blocked urethane (B) which consists of a high molecular weight polyol having a molecular weight of 400 or more, a polyisocyanate and a blocking agent. A process for manufacturing the strip is also disclosed.

    摘要翻译: PCT No.PCT / JP92 / 00891 Sec。 371日期1993年3月9日 102(e)日期1993年3月9日PCT提交1992年7月10日PCT公布。 公开号WO93 / 01004 日本1993年1月21日。在例如形成汽车车体的外板的外侧,期望具有高耐化妆品腐蚀性和优异的图像清晰度的有机复合涂层钢板。 该钢板在锌或锌合金板钢的表面上形成铬酸盐层,并且含有比重为铬的铬酸盐层和由特定比例的阻挡聚氨酯形成在铬酸盐层上的有机树脂膜 改性环氧树脂和防锈添加剂,其厚度为0.2至2微米。 树脂是由环氧树脂和多官能胺组成的改性环氧树脂(A)的特定比例的混合物,并且还可以含有单异氰酸酯或磷酸,和由高分子组成的封端的聚氨酯(B) 分子量为400以上的分子量多元醇,多异氰酸酯和封端剂。 还公开了一种制造带材的方法。