Organic composite coated steel sheet with good press formability and
perforation corrosion resistance
    4.
    发明授权
    Organic composite coated steel sheet with good press formability and perforation corrosion resistance 失效
    有机复合涂层钢板具有良好的冲压成型性和耐穿孔性

    公开(公告)号:US6015628A

    公开(公告)日:2000-01-18

    申请号:US809766

    申请日:1997-06-18

    摘要: This invention provides an organic composite coated steel sheet comprising, as the base, a zinc or zinc alloy coated steel sheet, which can be used in automobile bodies and electric appliances. The coated steel sheet has excellent press formability with oil, while having excellent perforation corrosion resistance and excellent corrosion resistance in a rust-contaminated environment. The coated steel sheet comprises a zinc or zinc alloy plated steel sheet having, on its surface, a chromate layer and an organic film formed in that order, in which the organic film has a thickness of from 0.1 to 3.0 .mu.m and comprises (i) an epoxy resin mixture composed of a base resin as prepared by adding at least one basic nitrogen atom and at least two primary hydroxyl groups to the ends of an epoxy resin, and a curing agent for the resin of a polyisocyanate compound, as mixed in a particular ratio by weight of the two, (ii) a composite lubricant comprising a polyolefin wax as prepared through coordination-anionic polymerization using a Ziegler catalyst, and fine powder of a fluorine resin, as combined in a particular ratio by weight of the two, and (iii) a rust preventive additive, as combined in a particular ratio of (i), (ii) and (iii).

    摘要翻译: PCT No.PCT / JP96 / 02156 Sec。 371日期:1997年6月18日 102(e)1997年6月18日PCT PCT 1996年7月31日PCT公布。 出版物WO97 / 04957 日期1997年2月13日本发明提供一种有机复合涂层钢板,其包含可用于汽车车身和电器的锌或锌合金涂层钢板作为基底。 涂布钢板与油的冲压成形性优异,同时在防锈污染的环境中具有优异的耐穿孔性和优异的耐腐蚀性。 涂覆钢板包括锌或锌合金电镀钢板,其表面上具有铬酸盐层和依次形成的有机膜,其中有机膜的厚度为0.1-3.0μm,并且包含(i )由通过向环氧树脂的末端添加至少一个碱性氮原子和至少两个伯羟基而制备的基础树脂的环氧树脂混合物,以及多异氰酸酯化合物的树脂固化剂 (ii)通过使用齐格勒催化剂的配位 - 阴离子聚合制备的包含聚烯烃蜡的复合润滑剂和氟树脂的细粉末,以特定的二重量比例组合, ,和(iii)以特定比例(i),(ii)和(iii)组合的防锈添加剂。