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36 条记录 (耗时 0.02 秒)

    Magnetic recording media
    4.
    发明授权
    Magnetic recording media 失效
    磁记录媒体

    公开(公告)号：US4666781A

    公开(公告)日：1987-05-19

    申请号：US759298

    申请日：1985-07-26

    申请人： August Lehner ,  Guenter Heil ,  Jenoe Kovacs ,  Werner Balz ,  Werner Lenz

    发明人： August Lehner ,  Guenter Heil ,  Jenoe Kovacs ,  Werner Balz ,  Werner Lenz

    IPC分类号： C09D5/23 ,  C09D175/04 ,  C09D175/14 ,  G11B5/702

    CPC分类号： G11B5/702 ,  Y10S428/90 ,  Y10T428/31609

    摘要： Magnetic recording media comprising a non-magnetic substrate and a magnetic layer comprising a finely divided magnetic material dispersed in an organic solvent soluble, crosslinkable, essentially linear, thermoplastic polyurethane which possesses acrylate side and terminal groups wherein said polyurethane is prepared by reacting poly- and/or diisocyanates with a mixture of (a) methacrylate - or acrylate - diols having molecular weights of from 146 to 3,000, (b) monoesters of methacrylic or acrylic acid and a diol having a molecular weight of from 116 to 300, and (c) other organic polydiol compounds which have molecular weights of from 400 to 5,000.

    摘要翻译： 包含非磁性基底和磁性层的磁性记录介质包括分散在有机溶剂可溶性，可交联的，基本上线性的热塑性聚氨酯中的细碎磁性材料，其具有丙烯酸酯侧和端基，其中所述聚氨酯通过聚 （a）分子量为146〜3000的（a）甲基丙烯酸酯或丙烯酸酯 - 二醇的混合物的二异氰酸酯，（b）甲基丙烯酸或丙烯酸的单酯和分子量为116〜300的二醇和（c ）分子量为400至5,000的其它有机聚二醇化合物。

    Magnetic recording discs
    8.
    发明授权
    Magnetic recording discs 失效
    磁记录盘

    公开(公告)号：US4046932A

    公开(公告)日：1977-09-06

    申请号：US656182

    申请日：1976-02-09

    申请人： Hans-Joerg Hartmann ,  Roland Falk ,  Peter Gawlik ,  Werner Balz ,  Karl Uhl ,  Dieter Schaefer ,  Herbert Motz

    发明人： Hans-Joerg Hartmann ,  Roland Falk ,  Peter Gawlik ,  Werner Balz ,  Karl Uhl ,  Dieter Schaefer ,  Herbert Motz

    IPC分类号： G11B5/702 ,  H01F10/02

    CPC分类号： G11B5/7023 ,  Y10S428/90 ,  Y10T428/254 ,  Y10T428/257 ,  Y10T428/269 ,  Y10T428/31529

    摘要： The invention relates to a process for the manufacture of improved magnetic discs by applying a thin layer of a liquid dispersion of magnetic pigments and optionally further, non-magnetic, pigments in a binder mixture to a non-magnetic rigid base, and curing the magnetic coating which has been applied. The binder used is a mixture of polycondensates comprising 60 to 70% by weight of a solid curable polycondensate of 2,2-bis(4-hydroxyphenyl)-propane and epichlorohydrin having an epoxy equivalent weight from about 400 to 2,500 and a melting point from about 50.degree. to 150.degree. C, 10 to 30% by weight of a curable allyloxybenzene-formaldehyde condensate of the resol type with free methylol groups or with methylol groups etherified with a lower alcohol, and having a molecular weight of less than 1,000, and 10 to 30% by weight of a curable melamine-formaldehyde condensate with more than two methylol groups etherified with n-butanol or iso-butanol, and having a molecular weight of less than 2,500. A magnetic dispersion using such a binder allows the application of a firmly adhering magnetic coating, even in thicknesses of less than 4 .mu., to aluminum discs or pre-coated aluminum discs, and the magnetic coating produced has high resistance to mechanical wear.

    摘要翻译： 本发明涉及通过将粘性混合物中的磁性颜料和任选的另外的非磁性颜料的液体分散体的薄层施加到非磁性刚性基底上来制造改进的磁盘的方法，以及固化磁性 已涂覆的涂层。 使用的粘合剂是包含60至70重量％的环氧当量为约400至2,500的2,2-双（4-羟基苯基） - 丙烷和表氯醇的固体可固化缩聚物的缩聚物混合物，熔点为 约50〜150℃，10〜30重量％的甲阶型固化性烯丙氧基苯 - 甲醛缩合物与游离羟甲基或与低级醇醚化的羟甲基，分子量小于1,000，以及 10至30重量％的可固化的三聚氰胺 - 甲醛缩合物，其具有用正丁醇或异丁醇醚化的两个以上羟甲基，分子量小于2500。 使用这种粘合剂的磁性分散体允许对铝盘或预涂铝盘施加甚至厚度小于4微米的牢固粘附的磁性涂层，并且所产生的磁性涂层具有高的耐机械磨损性。