Magnetic paint and objects coated with same
    3.
    发明公开
    Magnetic paint and objects coated with same 无效
    Magnetischer Austrich und mit ihm beschichtete Objekte。

    公开(公告)号:EP0549849A1

    公开(公告)日:1993-07-07

    申请号:EP92108012.3

    申请日:1992-05-12

    IPC分类号: G11B5/702

    摘要: A magnetic paint and objects coated with same are disclosed, where the magnetic paint is characterized by comprising, as its essential components, a block copolymer and magnetic powder, said block copolymer having polyurethane and vinyl polymer segments.
    The magnetic paint of the present invention exhibits good dispersability of the magnetic powder, and good surface smoothness, durability, and wear resistance of the magnetic recording medium. Objects which may be appropriately coated with the magnetic paint of the present invention include high-quality magnetic recording media, such as magnetic tapes, magnetic cards, prepaid cards, magnetic disks and so on.

    摘要翻译: 公开了一种磁性涂料和涂覆有该涂料的物体,其中磁性涂料的特征在于包括作为其主要组分的嵌段共聚物和磁性粉末,所述嵌段共聚物具有聚氨酯和乙烯基聚合物链段。 本发明的磁性涂料表现出良好的磁粉分散性,并且表现出良好的磁记录介质的表面平滑度,耐久性和耐磨性。 可以适当地涂覆本发明的磁性涂料的物体包括高品质的磁记录介质,例如磁带,磁卡,预付卡,磁盘等。

    Magnetischer Aufzeichnungsträger
    4.
    发明公开
    Magnetischer Aufzeichnungsträger 失效
    磁记录介质

    公开(公告)号:EP0486820A3

    公开(公告)日:1992-06-03

    申请号:EP91117883.8

    申请日:1991-10-19

    IPC分类号: G11B5/702

    摘要: Eine magnetische Dispersion, bestehend aus feinteiligem Eisenpulver oder Eisenlegierungspulver mit einem BET-Wert von mehr als 35 m 2 /g, welches in einem polymeren Bindemittel und einem organischen Lösungsmittel dispergiert ist und wobei die Filtrierbarkeit markant verbessert ist, wird dadurch erhalten, daß bestimmte niedermolekulare Phosphorsäureester der allgemeinen Formel 1 oder II

    in Kombination mit einer dispergieraktiven Verbindung, welche wenigstens eine polare, zur Absorption am magnetischen Pigment befähigte Gruppe enthält, eingesetzt wird. Die polare Gruppe der dispergieraktiven Verbindung kann eine saure oder alkalische oder amphotere Gruppe, eine zur Wasserstoffbrückenbildung befähigte oder polarisierbare Gruppe sein. Die dispergieraktive Verbindung kann ein Polykondensat, ein Polyadditionsprodukt oder ein Copolymerisat sein, welches auch in Kombination mit üblichen anderen polymeren Bindemitteln in der magnetischen Dispersion eingesetzt werden kann.

    摘要翻译: 由细碎铁粉或铁合金粉的具有超过35平方米/克,其分散在聚合物粘合剂和一种有机溶剂和可滤性在某些低分子量有机磷酸酯得到的显著改善的BET值的磁性分散体 通式1或II的化合物与含有至少一个能够吸附在磁性颜料上的极性基团的分散化合物组合。 分散化合物的极性基团可以是酸性或碱性或两性基团,氢键键合或可极化基团。 分散化合物可以是缩聚物,加聚产物或共聚物,其也可以与磁性分散体中的常规其他聚合物粘合剂组合使用。

    Magnetic recording medium
    8.
    发明公开
    Magnetic recording medium 失效
    磁记录介质

    公开(公告)号:EP0360175A2

    公开(公告)日:1990-03-28

    申请号:EP89117162.1

    申请日:1989-09-16

    IPC分类号: G11B5/716 G11B5/702

    摘要: A magnetic recording medium improved in the magnetic recording characteristics, running properties and durability is disclosed. The magnetic recording medium comprises a non-­magnetic support having on a side of the support an upper magnetic layer positioned farther from the support and a lower magnetic layer positioned closer to the support. The upper magnetic layer comprises a binder, a magnetic powder having an original BET specific surface area of not less than than 30 m²/g and at least one abrasive selected from alumina, silicon carbide, Cr₂O₃, silica, α-Fe₂O₃, TiO₂ and zilconia in a portion of 3 to 20 parts per 100 parts by weight of the magnetic powder, and the lower magnetic layer comprises a binder and a magnetic powder having an original BET specific surface area of less than 30 m²/g, and kinds of the binders each contained in the upper magnetic layer and the lower magnetic layer are the same.

    摘要翻译: 公开了磁记录特性,运行性能和耐用性得到改善的磁记录介质。 所述磁记录介质包括非磁性支撑件,所述非磁性支撑件在所述支撑件的一侧上具有远离所述支撑件定位的上磁性层和定位成更靠近所述支撑件的下磁性层。 上磁层包含粘合剂,原始BET比表面积不小于30m 2 / g的磁粉和至少一种选自氧化铝,碳化硅,Cr 2 O 3,二氧化硅,α-Fe 2 O 3,TiO 2和紫草的磨料 相对于100重量份磁性粉末为3〜20重量份,下部磁性层含有BET比表面积小于30m 2 / g的粘结剂和磁性粉末,粘结剂种类 包含在上磁层和下磁层中的每个都是相同的。

    MAGNETIC RECORDING MEDIUM
    9.
    发明授权
    MAGNETIC RECORDING MEDIUM 无效
    磁记录介质

    公开(公告)号:EP0112925B1

    公开(公告)日:1989-01-25

    申请号:EP83902125.0

    申请日:1983-07-01

    申请人: SONY CORPORATION

    IPC分类号: G11B5/70

    摘要: A magnetic recording medium comprising a non-magnetic support having provided thereon a magnetic layer mainly composed of needle-like magnetic powder and a binder, the magnetic powder being ferromagnetic metal powder having a coercive force of 1,000 Oe or more and a specific surface area of 45 m2/g (BET method) or more and the binder containing 50 wt % or more resin having high dispersibility due to the presence of at least one polar group selected from the group consisting of (I), (wherein M represents H, Li, Na or K, and M1 and M2 each represent H, Li, Na, K or an alkyl group) to attain excellent magnetic properties required for short-wave recording and improve durability.

    摘要翻译: 1,一种磁记录介质,其特征在于,在非磁性支撑体上设置有以针状磁性粉末和粘合剂为主成分的磁性层,该磁性粉末是强磁性金属粉末,其矫顽力为1000Oe以上,比表面积 由于存在选自(I),(其中M表示H,Li)和(II)的至少一种极性基团而具有高分散性的含有50重量%或更多树脂的粘合剂(BET方法) ,Na或K,并且M1和M2各自表示H,Li,Na,K或烷基)以获得短波记录所需的优异磁性,并提高耐久性。

    Magnetic recording medium
    10.
    发明公开
    Magnetic recording medium 失效
    MagnetischerAufzeichnungsträger。

    公开(公告)号:EP0297915A2

    公开(公告)日:1989-01-04

    申请号:EP88306041.0

    申请日:1988-06-30

    IPC分类号: G11B5/70 G11B5/706 G11B5/702

    摘要: A magnetic recording medium is disclosed which is produced by applying to a non-magnetic substrate a magnetic coating material containing a ferromagnetic powder and a resinous binder. The coating formed of the magnetic coating material exhibits a deformation ratio (in the direction perpendicular to the film surface from the magnetic layer side) is not more than 1 x 10⁻² µm³/mgf. This magnetic recording medium possesses a high surface accuracy, retains a highly desirable runnability for a long period of time, and excels in durability.

    摘要翻译: 公开了一种磁记录介质,其通过向非磁性基底施加含有铁磁性粉末和树脂粘合剂的磁性涂层材料而制造。 由磁性涂料形成的涂层表现出的变形率(在与磁性层侧的膜表面垂直的方向上)不超过1×10 -3 m 2 / m 3。 该磁记录介质具有高的表面精度,长时间保持非常理想的运行性能,并且耐久性优异。