利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

16 条记录 (耗时 0.019 秒)

    Magnetic recording medium containing a specified ferromagnetic powder, polyurethane resin prepared from specified branched chain diols and a fatty acid ester
    4.
    发明授权
    Magnetic recording medium containing a specified ferromagnetic powder, polyurethane resin prepared from specified branched chain diols and a fatty acid ester 失效
    含有特定铁磁粉末的磁记录介质，由特定的支链二醇和脂肪酸酯制备的聚氨酯树脂

    公开(公告)号：US5116683A

    公开(公告)日：1992-05-26

    申请号：US536536

    申请日：1990-06-12

    申请人： Noboru Koyama ,  Setsuko Kawahara ,  Rieko Ren ,  Kenji Kumamoto ,  Noboru Nakajima

    发明人： Noboru Koyama ,  Setsuko Kawahara ,  Rieko Ren ,  Kenji Kumamoto ,  Noboru Nakajima

    IPC分类号： C08G18/42 ,  G11B5/702

    CPC分类号： G11B5/7021 ,  C08G18/42 ,  Y10S428/90 ,  Y10T428/2991 ,  Y10T428/31551 ,  Y10T428/3158 ,  Y10T428/31609

    摘要： There is disclosed a magnetic recording medium having excellent dispersability of ferromagnetic powder and ensuring stable production as well as excellent durability and electromagnetic conversion properties. The recording medium comprises a non-magnetic support and provided thereon at least one magnetic layer containing a ferromagnetic compound, wherein at least one of the magnetic layers contains:a fatty ester of 0.05 to 2 parts by weight per 100 parts by weight of the magnetic powder and,a binder composed of a urethane resin prepared from isocyanate and polyesterpolyol comprising carboxylic acid and diol represented by the following Formula I: ##STR1## wherein R represents a hydrocarbon group having 1 to 6 carbon atoms; and R' represents a hydrogen atom or a hydrocarbon group having 1 to 6 carbon atoms, provided that the total number of carbon atoms included in R and R' is 3 to 10 and that at least one of R and R' is a branched alkyl group having 3 or more carbon atoms.

    摘要翻译： 公开了一种具有优异的铁磁粉末分散性的磁记录介质，确保了稳定的生产以及优异的耐久性和电磁转换特性。 记录介质包括非磁性载体，并在其上提供至少一个含有铁磁性化合物的磁性层，其中至少一个磁性层含有：相对于每100重量份的磁性材料为0.05-2重量份的脂肪酸酯 粉末和由由异氰酸酯制备的聚氨酯树脂和包含羧酸和由下式I表示的二醇的聚酯多元醇组成的粘合剂：其中R表示具有1至6个碳原子的烃基; R'表示氢原子或碳原子数为1〜6的烃基，条件是R和R'中包含的碳原子数为3〜10，R和R'中的至少一个为支链烷基 具有3个以上碳原子的基团。

    Magnetic recording medium and manufacturing method thereof
    5.
    发明授权
    Magnetic recording medium and manufacturing method thereof 失效
    磁记录介质及其制造方法

    公开(公告)号：US5151323A

    公开(公告)日：1992-09-29

    申请号：US588689

    申请日：1990-09-28

    申请人： Setsuko Kawahara ,  Yasushi Nakano ,  Noboru Koyama

    发明人： Setsuko Kawahara ,  Yasushi Nakano ,  Noboru Koyama

    IPC分类号： C09C1/48 ,  C09D5/23 ,  C09D7/12 ,  G11B5/708 ,  G11B5/716 ,  G11B5/73 ,  G11B5/735 ,  G11B5/84 ,  G11B5/842

    CPC分类号： G11B5/716 ,  G11B5/708 ,  Y10S428/90 ,  Y10T428/25 ,  Y10T428/257 ,  Y10T428/30

    摘要： A magnetic recording medium and manufacturing method thereof are disclosed. The recording medium comprisesa support,a plurality of magnetic layer being provided on a surface of the support, anda backcoat layer being provided on the other surface of the support and comprising a binder and a carbon black, whereinan outermost magnetic layer being provided at the outermost portion from the support among said plurality of magnetic layers comprises, a binder, a magnetic powder and a carbon black in which the weight ratio of the carbon black to the magnetic powder is 0.1 to 0.5 percent,a magnetic layer other than the outermost magnetic layer comprises a binder, a magnetic powder different from the magnetic powder contained in the outermost layer and a carbon black in which the weight ratio of the carbon black to the magnetic powder is zero to 0.4 percent.The plurality of magnetic layers are coated on the support under a condition of wet on wet.

    摘要翻译： 公开了一种磁记录介质及其制造方法。 记录介质包括支撑体，多个磁性层设置在支撑体的表面上，背涂层设置在载体的另一个表面上，并且包括粘合剂和炭黑，其中提供最外层的磁性层 在所述多个磁性层的支撑体的最外侧部分包括粘合剂，磁性粉末和炭黑，其中炭黑与磁性粉末的重量比为0.1〜0.5％，除了 最外层的磁性层包括粘合剂，不同于最外层中所含的磁粉的磁性粉末和炭黑与磁粉的重量比为0〜0.4％的炭黑。 多个磁性层在湿润的条件下涂覆在载体上。

    Magnetic recording medium
    6.
    发明授权
    Magnetic recording medium 失效
    磁记录介质

    公开(公告)号：US5051291A

    公开(公告)日：1991-09-24

    申请号：US464344

    申请日：1990-01-12

    申请人： Setsuko Kawahara ,  Yasushi Nakano ,  Noboru Koyama

    发明人： Setsuko Kawahara ,  Yasushi Nakano ,  Noboru Koyama

    IPC分类号： G11B5/716

    CPC分类号： G11B5/716 ,  Y10S428/90 ,  Y10T428/24355 ,  Y10T428/25 ,  Y10T428/265

    摘要： A magnetic recording medium is disclosed. The medium comprises a non-magnetic support and, provided thereon in order, a first magnetic layer and a second magnetic layer each containing a magnetic material and a binder. Rmax, a maximum roughness, and Ra, a center line average roughness, of a surface of the support on the magnetic layer side, d.sub.1, a thickness of the first magnetic layer, and d.sub.2, a thickness of the second magnetic layer, have the following relation,4.times.10.sup.-3 .ltoreq.Ra/d.sub.1 .ltoreq.1.8.times.10.sup.-24.times.10.sup.-2 .ltoreq.Rmax/d.sub.1 .ltoreq.4.5.times.10.sup.-1d.sub.2 .ltoreq.1.0 .mu.m

    摘要翻译： 公开了一种磁记录介质。 介质包括非磁性支撑体，并且依次设置有分别含有磁性材料和粘合剂的第一磁性层和第二磁性层。 磁极层侧的载体表面的最大粗糙度Rmax，中心线平均粗糙度，d1，第一磁性层的厚度，d2，第二磁性层的厚度， 4×10 -3≤Ra/ d1×1.8×2-2-2×××××××××××R /

    Magnetic recording medium and method of making it
    9.
    发明授权
    Magnetic recording medium and method of making it 失效
    磁记录媒体及其制作方法

    公开(公告)号：US5093193A

    公开(公告)日：1992-03-03

    申请号：US498327

    申请日：1990-03-23

    申请人： Noboru Koyama ,  Setsuko Kawahara ,  Yasushi Nakano

    发明人： Noboru Koyama ,  Setsuko Kawahara ,  Yasushi Nakano

    IPC分类号： G11B5/706 ,  C09D5/23 ,  C09D127/04 ,  C09D127/06 ,  C09D175/00 ,  C09D175/04 ,  G11B5/716 ,  G11B5/84 ,  G11B5/842

    CPC分类号： G11B5/716 ,  Y10S428/90 ,  Y10T428/265

    摘要： A magnetic recording medium and its manufacturing method are disclosed. The medium comprises a non-magnetic support and, provided thereon, a first magnetic layer coated by a first magnetic coating solution and a second magnetic layer coated by a second magnetic coating solution in this order, wherein a dry thickness of the first magnetic layer represented by .mu.m, t.sub.1, a dry thickness of the second magnetic layer represented by .mu.m, t.sub.2, the solid content of the first magnetic coating solution represented by weight %, W.sub.1, and the solid content of the second magnetic coating solution represented by weight %, W.sub.2 have the following relation,2.0.ltoreq.(t.sub.1 /W.sub.1) / (t.sub.2 /W.sub.2).ltoreq.15.0

    摘要翻译： 公开了一种磁记录介质及其制造方法。 所述介质包括非磁性载体，并且在其上设置由第一磁性涂层溶液涂覆的第一磁性层和由第二磁性涂层溶液涂覆的第二磁性层，其中所述第一磁性层的干燥厚度表示为 以μm为单位，以μm为单位表示第二磁性层的干燥厚度，t2，以重量％表示的第一磁性涂层溶液的固体含量，W1和以重量计的第二磁性涂层溶液的固体含量 ％，W2具有以下关系：2.0

    Magnetic recording medium
    10.
    发明授权
    Magnetic recording medium 失效
    磁记录介质

    公开(公告)号：US5336559A

    公开(公告)日：1994-08-09

    申请号：US931898

    申请日：1992-08-18

    申请人： Hiroaki Yamagishi ,  Yasushi Nakano ,  Setsuko Kawahara ,  Noboru Koyama

    发明人： Hiroaki Yamagishi ,  Yasushi Nakano ,  Setsuko Kawahara ,  Noboru Koyama

    IPC分类号： G11B5/738 ,  G11B5/842 ,  B32B5/16 ,  G11B5/66

    CPC分类号： G11B5/738 ,  G11B5/842 ,  Y10T428/257 ,  Y10T428/265

    摘要： A magnetic recording medium is disclosed which is excellent in the electro-magnetic conversion efficiency and inhibited drop-out. The magnetic recording medium cpomprises a non-magnetic support; a non-magnetic layer comprising a carbon black and a binder and being provided on the non-magnetic support; and a magnetic layer containing ferromagnetic metal particles comprising iron and aluminum or a magnetic layer containing tabular-shaped magnetic particles having an axis of easy magnetization with the direction perpendicular to the tabular surface, in which the magnetic layer is provided on the side of the non-magnetic layer farther fron the support by wet-on-wet coating procedure and has a dry thickness of from 0.3 .mu.m to 4.0 .mu.m.

    摘要翻译： 公开了一种电磁转换效率优异且抑制脱落的磁记录介质。 磁记录介质采用非磁性支撑; 非磁性层，其包含炭黑和粘合剂，并且设置在所述非磁性载体上; 以及包含铁和铝的铁磁金属颗粒的磁性层或含有具有垂直于平板状表面的方向具有易磁化轴线的片状磁性颗粒的磁性层，其中磁性层设置在非磁性层的侧面上， 磁性层通过湿式湿法涂布方法进一步提供，并且具有0.3μm至4.0μm的干厚度。