Precoated steel sheet having improved corrosion resistance and
formability
    1.
    发明授权
    Precoated steel sheet having improved corrosion resistance and formability 失效
    具有改善的耐腐蚀性和成形性的预涂钢板

    公开(公告)号:US5141822A

    公开(公告)日:1992-08-25

    申请号:US620449

    申请日:1990-12-03

    摘要: A precoated steel sheet having improved corrosion resistance and formability is disclosed, which comprises a Zn- or Zn alloy-plated steel sheet having on the plated surface either a colloidal silica-containing chromate undercoat layer and a polyhydroxypolyether resin-based topcoat of 0.3 to 10 .mu.m in thickness in which resin is derived by polycondensation of a dihydric phenol component selected from a mononuclear dihydric phenol, dinuclear dihydric phenol, and a mixture of both, with an epihalohydrin or a non-colloidal material-containing chromate underlayer and an epoxy resin based topcoat containing colloidal silica of a thickness of from 0.3-1.6 .mu.m in thickness. In spite of the absence of zinc powder, the precoated steel sheet can be satisfactorily welded by resistance welding when the thickness of the topcoat layer is not greater than 2.5 .mu.m, and even with such a thin topcoat, the precoated steel sheet retains its improved corrosion resistance and formability. The precoated steel sheet can be satisfactorily finish-coated by electrodeposition. The undercoat layer is produced by a two stage reduction of Cr.sup.+6 to Cr.sup.+3 in an aqueous suspension containing chromic acid.

    摘要翻译: 公开了一种具有改进的耐腐蚀性和可成形性的预涂钢板,其包括在镀覆表面上具有含胶体二氧化硅的铬酸盐底涂层和聚羟基聚醚树脂基面涂层为0.3至10的镀Zn钢或Zn合金 通过将选自单核二元酚,双核二元酚和二者的混合物的二元酚成分与表卤代醇或非胶体材料的铬酸盐底层和环氧树脂缩聚得到树脂的厚度μm 含有厚度为0.3-1.6μm厚度的胶体二氧化硅的基面涂层。 尽管不存在锌粉,但是当顶涂层的厚度不大于2.5μm时,预涂钢板可以通过电阻焊接令人满意地焊接,并且即使使用这种薄的顶涂层,预涂钢板保持其改进 耐腐蚀性和成型性。 预涂钢板可以通过电沉积令人满意地完成涂层。 底涂层是通过在含有铬酸的含水悬浮液中将Cr +6还原为Cr + 3来进行的。

    Metal-resin-metal sandwich laminates suitable for use in press forming
    2.
    发明授权
    Metal-resin-metal sandwich laminates suitable for use in press forming 失效
    适用于压制成型的金属 - 树脂 - 金属夹层板

    公开(公告)号:US4594292A

    公开(公告)日:1986-06-10

    申请号:US658917

    申请日:1984-10-09

    IPC分类号: B32B15/08

    摘要: A rigid metal-resin-metal sandwich laminate capable of withstanding 180.degree. bending with a threshold bending inner diameter of less than or equal to twice the total laminate thickness and suitable for use in the manufacture of building materials, containers, and particularly automotive parts including automotive outer panels is disclosed. The laminate comprises a resin layer sandwiched between and bonded to outer metal layers wherein the resin layer is comprised of a core sheet sandwiched between outer resin sheets, said core sheet being made of a resin which exhibits plastic behavior and which is bonded to said outer resin sheets with or without an adhesive layer, and said outer resin sheets being made of a ductile resin which does not exhibit yielding behavior or necking when stretched.

    摘要翻译: 一种刚性金属 - 树脂 - 金属夹心层压板,能够承受180度弯曲,弯曲内径小于或等于总层压板厚度的两倍,适用于制造建筑材料,容器,特别是汽车部件,包括 公开了汽车外板。 层压体包括夹在外部金属层之间并与外部金属层接合的树脂层,其中树脂层由夹在外部树脂片之间的芯片构成,所述芯片由表现出塑性行为的树脂制成并且与所述外部树脂 具有或不具有粘合剂层的片材,并且所述外部树脂片材由延展性不显示屈服行为或缩颈的延性树脂制成。

    Anticorrosive primer composition
    7.
    发明授权
    Anticorrosive primer composition 失效
    防腐底漆组合物

    公开(公告)号:US5468461A

    公开(公告)日:1995-11-21

    申请号:US294812

    申请日:1994-08-25

    摘要: An anticorrosive primer composition comprises (1) 100 parts by weight of an epoxy resin having a number-average molecular weight of from 500 to 10,000, (2) from 10 to 60 parts by weight of an aromatic polyamine containing from 2% to 30% by weight, based on the aromatic polyamine, of a promoter selected from the group consisting of phenol compounds and cresol compounds, (3) from 10 to 60 parts by weight of a polyisocyanate, (4) from 10 to 40 phr, based on the sum of components (1), (2), and (3), of silica particles of colloidal silica or fumed silica or a mixture of these, (5) from 0.5 to 5 phr of a lubricant, and (6) an organic solvent. The composition is particularly suitable for use to apply onto the chromate coating of a chromated, zinc-plated steel sheet.

    摘要翻译: 防腐底漆组合物包含(1)100重量份的数均分子量为500至10,000的环氧树脂,(2)10至60重量份的含有2至30重量%的芳族多胺, 基于芳族多胺,选自苯酚化合物和甲酚化合物的促进剂,(3)10至60重量份的多异氰酸酯,(4)10至40phr,基于 胶体二氧化硅或热解二氧化硅的二氧化硅颗粒或其混合物的组分(1),(2)和(3)的总和,(5)0.5至5phr的润滑剂,和(6)有机溶剂 。 该组合物特别适合用于镀铬铬镀锌钢板的铬酸盐涂层上。

    Cross-linking and foaming injection molding process for ethylenic
polymers
    8.
    发明授权
    Cross-linking and foaming injection molding process for ethylenic polymers 失效
    乙烯聚合物的交联和发泡注塑成型工艺

    公开(公告)号:US4048275A

    公开(公告)日:1977-09-13

    申请号:US627409

    申请日:1975-10-30

    摘要: An injection molding process for forming cross-linked, foamed moldings of an ethylenic polymer by passing a molding composition comprising an ethylenic polymer/cross-linking agent/foaming agent blend through the cylinder of an injection molding machine without substantially decomposing the cross-linking agent and the foaming agent, introducing the molding composition into a molding composition holding chamber provided at the exit end of the cylinder of the injection molding machine to decompose the cross-linking agent and the foaming agent therein, and injecting the molding composition into a mold.The invention also provides apparatus for carrying out the process comprising an injection molding cylinder for conveying and plasticizing the molding composition and a molding composition holding chamber provided at the exit end of the cylinder.

    摘要翻译: 一种用于通过使包含乙烯性聚合物/交联剂/发泡剂混合物的模塑组合物通过注射成型机的圆筒通过而形成交联的乙烯类聚合物的发泡模制品的注射成型方法,而基本上不分解交联剂 和发泡剂,将成型组合物引入设置在注射成型机的圆筒的出口端的成型组合物保持室中,以将交联剂和发泡剂分解,并将模塑组合物注入模具中。