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    MAGNETIC RECORDING MEDIUM
    21.
    发明申请
    MAGNETIC RECORDING MEDIUM 审中-公开
    磁记录介质

    公开(公告)号：WO1997027582A1

    公开(公告)日：1997-07-31

    申请号：PCT/EP1997000325

    申请日：1997-01-24

    Applicant: EMTEC MAGNETICS GMBH ,  WEINGART, Franz ,  PAULUS, Wolfgang ,  BAUER, Stephan ,  KOHL, Albert

    Inventor： EMTEC MAGNETICS GMBH

    IPC: G11B05/702

    CPC classification number: G11B5/7023 ,  G11B5/7022

    Abstract: The invention concerns a magnetic recording medium comprising at least one magnetic recording layer containing magnetic pigments provided with a polymer I which is suitable as a dispersing resin and is obtained by reacting: A) a polymer II, obtained by reacting at least one ester, vinyl chloride, styrene or vinyl benzene in the presence of a compound containing an N-oxyl radical function, with: B) at least one compound X comprising: a) between 50 and 100 wt %, relative to X, of at least one compound XI selected from the group comprising an ester, an amide, an N-vinyl compound, styrene sulphonic acid or a vinyl benzene sulphonic acid; and b) between 0 and 50 wt %, relative to X, of at least one compound XIX selected from the group comprising an ester, vinyl chloride, styrene or vinyl benzenes, in the presence of a compound containing an N-oxyl radical function, the portion by weight of II in polymer I being between 10 and 90 wt % and the portion by weight of the total amount of X being between 10 and 90 wt % in polymer I.

    Abstract translation: 具有包含磁性颜料至少一个磁记录层的磁记录介质，其配备有适合作为分散聚合物我通过使A）聚合物获得的II获得的由至少一种酯，氯乙烯，苯乙烯或乙烯基苯，在化合物的存在下反应 含有N-氧基与乙基基团的功能）的一个）50-100重量％至X的至少一种化合物X，选自酯，酰胺，N-所组成的组的至少一种化合物XI 乙烯基化合物，苯乙烯或乙烯基苯磺酸，和b）0-50重量％，基于X在由酯，氯乙烯，苯乙烯或乙烯基苯的，在含有N-氧基化合物的存在下的组的至少一种化合物XIX 含自由基的功能，其中的二中聚合物的重量比I 10至90重量％，并且以重量计占总X 10至90的比例 是重量的聚合物I的％

    MAGNETIC RECORDING MEDIUM AND PRODUCTION METHOD THEREOF
    22.
    发明申请
    MAGNETIC RECORDING MEDIUM AND PRODUCTION METHOD THEREOF 审中-公开
    磁记录介质及其制作方法

    公开(公告)号：WO1994009491A1

    公开(公告)日：1994-04-28

    申请号：PCT/JP1993001485

    申请日：1993-10-15

    Applicant: TDK CORPORATION

    Inventor： TDK CORPORATION ,  KOHNO, Masahide ,  KURODA, Kazuhiro ,  ISHIKAWA, Yasushi ,  SASAKI, Hideki ,  TAKASUGI, Yasufumi ,  IKARASHI, Tsunehiko ,  INOUE, Osamu

    IPC: G11B05/702

    CPC classification number: G11B5/735 ,  G11B5/7022 ,  G11B5/7023 ,  G11B5/7026 ,  Y10S428/90 ,  Y10T428/31609 ,  Y10T428/31935

    Abstract: A magnetic recording medium comprises a nonmagnetic base, on which are formed an electron-cured magnetic resin layer containing dispersed ferromagnetic powder and an electron-cured resin backcoating. The present invention uses an electron-curable vinyl chloride resin having sulfur-containing polar group in combination with an electron-curable urethane resin having a phosphorus-containing polar group. In this way, the dispersion of ferromagnetic powder, surface flatness and electromagnetic conversion characteristics can be improved. Further, an error rate can be reduced in high density digital recording. Further, storage property is excellent.

    Abstract translation: 磁记录介质包括非磁性基底，在其上形成含有分散的铁磁性粉末和电子固化树脂背涂层的电子固化的磁性树脂层。 本发明使用具有含硫极性基团的电子可固化氯乙烯树脂与具有含磷极性基团的电子可固化聚氨酯树脂组合。 以这种方式，可以提高铁磁粉末的分散性，表面平坦度和电磁转换特性。 此外，在高密度数字记录中可以降低错误率。 此外，保存性优异。

    HIGH MOLECULAR WEIGHT BINDERS FOR MAGNETIC RECORDING MEDIA
    24.
    发明申请
    HIGH MOLECULAR WEIGHT BINDERS FOR MAGNETIC RECORDING MEDIA 审中-公开
    用于磁记录介质的高分子重量粘合剂

    公开(公告)号：WO1990014662A1

    公开(公告)日：1990-11-29

    申请号：PCT/US1990002792

    申请日：1990-05-21

    Applicant: MINNESOTA MINING AND MANUFACTURING COMPANY

    Inventor： MINNESOTA MINING AND MANUFACTURING COMPANY ,  PENDERGRASS, Daniel, B., Jr.

    IPC: G11B05/702

    CPC classification number: G11B5/702 ,  Y10S428/90

    Abstract: The present invention provides an improved magnetic recording medium comprising a non-magnetic support with at least one magnetic layer comprising a magnetizable pigment dispersed in a binder composition. The binder composition of the present invention comprises a block copolymer, having a hard segment, with a glass transition temperature (Tg) of greater than about 70°C, and a soft segment, having a Tg of less than about -30°C. The binder composition of the present invention has relatively stable physical properties over a range of temperatures, preferably at least 50°C and more preferably at least 100°C.

    Magnetic recording medium
    29.
    发明公开
    Magnetic recording medium 失效
    磁记录介质

    公开(公告)号：EP0146897A3

    公开(公告)日：1987-05-27

    申请号：EP84115493

    申请日：1984-12-14

    Applicant: SONY CORPORATION

    Inventor： Ninomiya, Yoshinobu c/o Sony Corp. ,  Somezawa, Masashi c/o Sony Magn. Prod. Inc. ,  Oiyama, Kiyokazu c/o Sony Corp.

    IPC: G11B05/702

    CPC classification number: G11B5/7021 ,  C08G18/0819 ,  C08G18/671 ,  C08G18/675 ,  C08G18/8158 ,  Y10S428/90 ,  Y10T428/31609

    Abstract: A magnetic recording medium has a magnetic layer consisting essentially of a binder and magnetic particles on one surface of a non-magnetic substrate. The thermoplastic polyurethane-urea resin in which unsaturated bonds sensitive to radiation are introduced is used as the binder. The thermoplastic polyurethane-urea resin in which the radiation-sensitive unsaturated bonds are introduced has both urethane and urea bonds in the molecular structure thereof. It is synthesized from long chain diol with a molecular weight of approximately 500 to 5000, a short chain diol with a molecular weight of approximately 50 to 500, an organic diisocyanate, an organic diamine, and a compound containing radiation-sensitive unsaturated double bonds, and cured by radiation. The thermoplastic polyurethane-urea resin in which not only the radiation-sensitive double bonds but also hydrophilic polar groups are introduced may also be used as the binder. These hydrophilic polar groups may for example include -S0 3 M, -OS0 3 M, -COOM, and

    Abstract translation: 磁记录介质具有基本上由粘合剂和磁性颗粒组成的磁性层，磁性颗粒位于非磁性基底的一个表面上。 引入对辐射敏感的不饱和键的热塑性聚氨酯 - 脲树脂用作粘合剂。 其中引入辐射敏感性不饱和键的热塑性聚氨酯 - 脲树脂在其分子结构中具有氨基甲酸酯和脲键。 它由分子量约500-5000的长链二醇，分子量约50-500的短链二醇，有机二异氰酸酯，有机二胺和含辐射敏感的不饱和双键的化合物合成， 并通过辐射固化。 也可以使用其中不仅引入辐射敏感性双键而且引入亲水性极性基团的热塑性聚氨酯 - 脲树脂作为粘合剂。 这些亲水极性基团可以例如包括-SO 3 M，-OSO 3 M，-COOM，和

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