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    Magnetic recording members
    1.
    发明授权
    Magnetic recording members 失效
    磁记录部件

    公开(公告)号：US4068040A

    公开(公告)日：1978-01-10

    申请号：US588936

    申请日：1975-06-20

    申请人： Yasuyuki Yamada ,  Kazuhiko Morita ,  Goro Akashi

    发明人： Yasuyuki Yamada ,  Kazuhiko Morita ,  Goro Akashi

    IPC分类号： G11B5/702 ,  H01F10/02

    CPC分类号： G11B5/7022 ,  Y10S428/90 ,  Y10T428/31576 ,  Y10T428/3158 ,  Y10T428/31609 ,  Y10T428/31855

    摘要： Magnetic recording tapes having an excellent durability are obtained by using as a binder for ferromagnetic powders on a base film or sheet an intimate mixture of (1) a vinyl chloride-vinyl acetate copolymer, (2) an organic polyisocyanate and (3) a reactive acrylic resin having a carboxyl group content of from 1 to 30% by weight which will react through the carboxyl groups with the polyisocyanate compound into a crosslinked cured state.

    摘要翻译： 通过在（1）氯乙烯 - 乙酸乙烯酯共聚物，（2）有机多异氰酸酯和（3）有机多异氰酸酯和（3）有机多异氰酸酯的紧密混合物的基础薄膜或片材上使用铁磁粉末的粘合剂，获得具有优异耐久性的磁记录带 羧基含量为1〜30重量％的丙烯酸树脂，其通过羧基与多异氰酸酯化合物反应成交联固化状态。

    Process for stabilization of ferromagnetic material and magnetic recording member
    3.
    发明授权
    Process for stabilization of ferromagnetic material and magnetic recording member 失效
    强磁性材料和磁记录元件的稳定化工艺

    公开(公告)号：US4015030A

    公开(公告)日：1977-03-29

    申请号：US591681

    申请日：1975-06-30

    申请人： Koji Sasazawa ,  Yasuyuki Yamada ,  Tatsuji Kitamoto ,  Goro Akashi

    发明人： Koji Sasazawa ,  Yasuyuki Yamada ,  Tatsuji Kitamoto ,  Goro Akashi

    IPC分类号： H01F1/11 ,  C09D5/23 ,  C09D7/12 ,  G11B5/62 ,  G11B5/706 ,  H01F10/02

    CPC分类号： G11B5/70694

    摘要： A process for stabilizing a ferromagnetic material comprising heat-treating a needle-like ferromagnetic material represented by the formula MO.sub.x wherein M is a ferromagnetic metal ion or a ferromagnetic non-metal ion and another metal ion, and x is the degree of oxidation which ranges from 1.36 to 1.47, and containing at least 0.5 atom % Co, at a temperature of at least about 40.degree. C, and a process for stabilizing a magnetic recording member comprising heat-treating a magnetic recording member produced by providing a ferromagnetic recording layer comprising (a) a ferromagnetic material represented by the formula MO.sub.x wherein M and x are the same as defined above, and containing at least 0.5 atom % Co, and (b) a binder, on a support, at a temperature of at least about 40.degree. C.

    摘要翻译： 一种用于稳定铁磁材料的方法，包括热处理由式MOx表示的针状铁磁材料，其中M是铁磁金属离子或铁磁性非金属离子和另一种金属离子，x是氧化程度 1.36至1.47，并且在至少约40℃的温度下含有至少0.5原子％的Co，以及用于稳定磁性记录元件的方法，该方法包括热处理通过提供铁磁性记录层产生的磁性记录元件，所述磁性记录元件包括 （a）由式MOx表示的铁磁材料，其中M和x与上述定义相同，并且在载体上至少包含至少约40的温度下含有至少0.5原子％的Co和（b）粘合剂 DEG C.

    Magnetic recording medium
    4.
    发明授权
    Magnetic recording medium 失效
    磁记录介质

    公开(公告)号：US4444838A

    公开(公告)日：1984-04-24

    申请号：US387129

    申请日：1982-06-10

    申请人： Yasuyuki Yamada ,  Goro Akashi ,  Nobuo Tsuji ,  Yoshito Mukaida

    发明人： Yasuyuki Yamada ,  Goro Akashi ,  Nobuo Tsuji ,  Yoshito Mukaida

    IPC分类号： C08G18/64 ,  C09D5/23 ,  G11B5/702 ,  G11B5/70

    CPC分类号： C08G18/6484 ,  G11B5/7022 ,  Y10S428/90 ,  Y10T428/264 ,  Y10T428/265 ,  Y10T428/31609 ,  Y10T428/31826 ,  Y10T428/31931

    摘要： A magnetic recording medium which comprises on a support base having coated thereon a magnetic layer containing a binder and a ferromagnetic fine powder dispersed in the binder is disclosed. The binder is comprised of a cellulose derivative having a residual OH group in a proportion of 7.5 to 40%, a diolefin or olefin series synthetic rubber and a polyisocyanate compound. The medium has excellent video sensitivity and video signal to noise ratio. The medium of the invention also have improved abrasion resistance.

    摘要翻译： 公开了一种磁记录介质，其包括在其上涂覆有包含粘合剂的磁性层的支撑基底和分散在粘合剂中的铁磁细粉末。 粘合剂由具有7.5〜40％的残留OH基的纤维素衍生物，二烯烃或烯烃系合成橡胶和多异氰酸酯化合物构成。 该介质具有出色的视频灵敏度和视频信噪比。 本发明的介质也具有改善的耐磨性。

    Process for producing magnetic recording device
    6.
    发明授权
    Process for producing magnetic recording device 失效
    磁记录装置的制造方法

    公开(公告)号：US4368237A

    公开(公告)日：1983-01-11

    申请号：US38620

    申请日：1979-05-14

    申请人： Yasuyuki Yamada ,  Tatsuji Kitamoto ,  Goro Akashi

    发明人： Yasuyuki Yamada ,  Tatsuji Kitamoto ,  Goro Akashi

    IPC分类号： C09D5/23 ,  G11B5/702 ,  G11B5/842 ,  H01F10/02

    CPC分类号： G11B5/7022 ,  Y10S428/90 ,  Y10T428/31511 ,  Y10T428/31609 ,  Y10T428/31725 ,  Y10T428/31935

    摘要： A magnetic recording material having superior abrasion resistance and thermal stability is produced by coating a magnetic coating composition consisting essentially of aqueous emulsions of at least two resin binders capable of reacting with each other upon mixing, and being present therein in the separated state, and a ferromagnetic powder on a non-magnetic support, drying the coating, and curing the resulting magnetic recording layer where drying is insufficient to effect curing. Hazards ascribable to the use of organic solvents in conventional techniques can be obviated by this invention.

    摘要翻译： 具有优异的耐磨性和热稳定性的磁记录材料通过涂覆基本上由至少两种混合后能够彼此反应并且以分离状态存在的树脂粘合剂的水乳液组成的磁性涂料组合物， 铁磁粉末在非磁性载体上，干燥涂层，并固化所得到的磁记录层，其中干燥不足以实现固化。 本发明可以避免归因于常规技术中使用有机溶剂的危害。

    Process for producing a magnetic recording medium
    7.
    发明授权
    Process for producing a magnetic recording medium 失效
    磁记录介质的制造方法

    公开(公告)号：US4391851A

    公开(公告)日：1983-07-05

    申请号：US353791

    申请日：1982-03-02

    申请人： Yasuyuki Yamada ,  Goro Akashi ,  Nobuo Tsuji ,  Yoshito Mukaida ,  Masaaki Fujiyama

    发明人： Yasuyuki Yamada ,  Goro Akashi ,  Nobuo Tsuji ,  Yoshito Mukaida ,  Masaaki Fujiyama

    IPC分类号： G11B5/842 ,  G11B5/702 ,  G11B5/84 ,  H01F10/02

    CPC分类号： G11B5/84 ,  G11B5/7021

    摘要： A process for producing a magnetic recording medium is disclosed. The process involves coating a non-magnetic base with magnetic coating solution containing fine ferromagnetic particles and a binder comprising nitrocellulose, polyol and an isocyanate having at least two isocyanato groups. In the process, the web having 0.3 to 3 wt % of the residual solvent in the magnetic layer is calendered, and the calendered web is then dried thoroughly.

    摘要翻译： 公开了一种制造磁记录介质的方法。 该方法包括用含有细铁磁颗粒的磁性涂层溶液和包含硝化纤维素，多元醇和具有至少两个异氰酸酯基的异氰酸酯的粘合剂涂覆非磁性碱。 在该方法中，将磁性层中的残留溶剂的0.3〜3重量％的纤维网压延，然后将压延纤维网彻底干燥。