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    Magnetic recording medium
    2.
    发明授权
    Magnetic recording medium 失效
    磁记录介质

    公开(公告)号：US5607782A

    公开(公告)日：1997-03-04

    申请号：US105614

    申请日：1993-08-13

    申请人： Toshio Ishida ,  Masaki Satake ,  Tsutomu Okita

    发明人： Toshio Ishida ,  Masaki Satake ,  Tsutomu Okita

    IPC分类号： G11B5/66 ,  C10M105/54 ,  C10M105/72 ,  C10M105/74 ,  C10N40/18 ,  G11B5/64 ,  G11B5/72 ,  G11B5/725 ,  G11B5/73

    CPC分类号： G11B5/725 ,  Y10S428/90

    摘要： A magnetic recording medium, comprising a magnetic layer having ferromagnetic metallic thin film at least on one side of a non-magnetic support, whereby a layer is formed on the magnetic layer, said layer contains at least one type of fluorine compounds having at least two perfluoroalkyl groups given by the following general formula (1) or (2) and one or more polar groups selected from --OH, --COOM, --SO.sub.3 M, --OSO.sub.3 M, --PO.sub.3 M.sub.2 or --OPO.sub.3 M.sub.2 (M representing hydrogen atom, alkali metal or ammonium):General formula (1)CF.sub.3 CF.sub.2 (CF.sub.2).sub.n (CH.sub.2)--.sub.mGeneral formula (2)(CF.sub.3).sub.2 CF(CF.sub.2).sub.n (CH.sub.2)--.sub.mwhere n is a number of 2 to 10, m is a number of 1 to 18, and n+m are an integer of 6 to 26.

    摘要翻译： 一种磁记录介质，包括在非磁性载体的至少一侧上具有铁磁性金属薄膜的磁性层，由此在所述磁性层上形成一层，所述层包含至少一种氟化合物，所述氟化合物具有至少两个 由以下通式（1）或（2）给出的全氟烷基和一个或多个选自-OH，-COOM，-SO 3 M，-OSO 3 M，-PO 3 M 2或-OPO 3 M 2的极性基团（M代表氢原子，碱金属或铵 ）通式（1）CF 3 CF 2（CF 2）n（CH 2）-m通式（2）（CF 3）2 CF（CF 2）n（CH 2）-m其中n为2〜10的数，m为1〜 18，n + m为6〜26的整数。

    Magnetic recording medium comprising a magnetic metallic thin film and a layer containing a specified fluorine compound and a specified tetrazaindene cyclic compound or thiouracil cyclic compound
    3.
    发明授权
    Magnetic recording medium comprising a magnetic metallic thin film and a layer containing a specified fluorine compound and a specified tetrazaindene cyclic compound or thiouracil cyclic compound 失效
    包含磁性金属薄膜和含有特定的氟化合物和特定的四唑环状化合物或硫脲嘧啶环状化合物的层的磁记录介质

    公开(公告)号：US5496645A

    公开(公告)日：1996-03-05

    申请号：US371672

    申请日：1995-01-12

    申请人： Toshio Ishida ,  Masaki Satake ,  Tsutomu Okita

    发明人： Toshio Ishida ,  Masaki Satake ,  Tsutomu Okita

    IPC分类号： G11B5/66 ,  C10M105/54 ,  C10M105/68 ,  C10N40/18 ,  G11B5/72 ,  G11B5/725 ,  G11B5/84 ,  G11B5/00

    CPC分类号： G11B5/725 ,  Y10S428/90 ,  Y10T428/3154 ,  Y10T428/31678

    摘要： A magnetic recording medium having a magnetic layer on a non-magnetic support, whereby an organic fluorine compound given by the following general formulae (1) or (2) is formed on said magnetic layer: ##STR1## where Rf.sup.1, Rf.sup.2 and Rf.sup.3 each represents a fluoroalkyl group, Y.sup.1, Y.sup.2 and Y.sup.3 each represents --O--, --OCO--, --COO, --NHCO--, or --CONH--and may be the same or different;R.sup.1 represents .dbd.CH.sub.2, .dbd.CH(CH.sub.2).sub.k CH.sub.3, or .dbd.CHCH.dbd.CH.sub.2, and k is a number from 0 to 2;R.sup.2 and R.sup.5 each represents H, and R.sup.2 is not present in case the carbon to which R.sup.2 is bonded has double bond.R.sup.3, R.sup.4 or R.sup.6 each represents H or a hydrocarbon group, which may have double bond.A, B and X each represents (CH.sub.2).sub.k, and k is a number from 0 to 2, and b is a number of 0 or one or higher.Rf.sup.1, Rf.sup.2, Rf.sup.3, Y.sup.1, Y.sup.2, Y.sup.3, A, B, X, R.sup.4, R.sup.5, R.sup.6, k, n, and m may be the same or different, and these may be cis type or trans type.

    摘要翻译： 一种在非磁性载体上具有磁性层的磁记录介质，由此在所述磁性层上形成由以下通式（1）或（2）给出的有机氟化合物：其中Rf1，Rf2和 Rf 3各自表示氟烷基，Y 1，Y 2和Y 3各自表示-O-，-OCO-，-COO，-NHCO-或-CONH-，可以相同或不同; R1表示= CH2，= CH（CH2）kCH3或= CHCH = CH2，k表示0〜2的数。 R2和R5各自表示H，R2键合的碳为双键时不存在。 R3，R4或R6各自表示H或可具有双键的烃基。 A，B和X各自表示（CH 2）k，k为0〜2的数，b为0以上1以上的数。 Rf1，Rf2，Rf3，Y1，Y2，Y3，A，B，X，R4，R5，R6，k，n和m可以相同或不同，它们可以是顺式或反式。

    Magnetic recording medium having a cobalt thin film magnetic layer, carbon protective layer, and fluorolubricant layer
    4.
    发明授权
    Magnetic recording medium having a cobalt thin film magnetic layer, carbon protective layer, and fluorolubricant layer 失效
    具有钴薄膜磁性层，碳保护层和氟润滑剂层的磁记录介质

    公开(公告)号：US5567524A

    公开(公告)日：1996-10-22

    申请号：US379931

    申请日：1995-01-27

    申请人： Toshio Ishida ,  Masaki Satake ,  Hideomi Watanabe ,  Tadashi Yasunaga ,  Tsutomu Okita

    发明人： Toshio Ishida ,  Masaki Satake ,  Hideomi Watanabe ,  Tadashi Yasunaga ,  Tsutomu Okita

    IPC分类号： G11B5/66 ,  C10M105/54 ,  C10N40/18 ,  G11B5/64 ,  G11B5/65 ,  G11B5/72 ,  G11B5/725 ,  G11B5/735

    CPC分类号： G11B5/725 ,  Y10S428/90 ,  Y10T428/30 ,  Y10T428/3154 ,  Y10T428/31678

    摘要： A magnetic recording medium having a ferromagnetic metal thin film formed over at least one surface of a non-magnetic support, wherein the improvement has a lubricant layer consisting essentially of at least one of unsaturated bond-containing fluoroalkyl carboxylic acid esters which are represented by the following formulae (1) to (3):Rf--R.sub.1 --COO--R.sup.2 Formula (1)R.sup.3 --COO--R.sub.4 --Rf Formula (2)Rf--R.sup.5 --COO--R.sup.6 Rf Formula (3)where Rf: (CF.sub.3).sub.a CF.sub.3-a (CF.sub.2).sub.ba: 1 to 3 a+b: 1 to 17R.sup.1 is an alkyl group having from 2 to 18 carbon atoms, or a hydrocarbon group having from 2 to 18 carbon atoms and containing at least one double or triple bond, and R.sup.2 is an alkyl group having from 4 to 22 carbon atoms, or a hydrocarbon group having from 4 to 22 carbon atoms and containing at least one double or triple bond. At least either one of R.sup.1 and R.sup.2 contains at least one double or triple bond. R.sup.3 is an alkyl group having from 3 to 21 carbon atoms, and R.sup.4 is a hydrocarbon group having from 4 to 18 carbon atoms and containing at least one double or triple bond. R.sup.5 and R.sup.6 are each an alkyl group having from 2 to 18 carbon atoms, or a hydrocarbon group having from 2 to 18 carbon atoms and containing at least one double or triple bond. At least either one of R.sup.5 and R.sup.6 contains at least one double or triple bond. R.sup.5 and R.sup.6 have from 20 to 44 carbon atoms in total.

    摘要翻译： 一种具有在非磁性载体的至少一个表面上形成的强磁性金属薄膜的磁记录介质，其中所述改进具有基本上由至少一种含不饱和键的氟烷基羧酸酯组成的润滑层，所述不饱和键的氟烷基羧酸酯由 （1）至（3）：Rf-R1-COO-R2（1）R3-COO-R4-Rf（2）Rf-R5-COO-R6RfFormula（3）其中Rf：（CF3）aCF3-a CF 2）ba：1〜3 a + b：1〜17 R 1为碳原子数2〜18的烷基或碳原子数为2〜18的含有至少一个双键或三键的烃基，R 2 是具有4至22个碳原子的烷基或具有4至22个碳原子并且含有至少一个双键或三键的烃基。 R1和R2中至少有一个含有至少一个双键或三键。 R3是具有3至21个碳原子的烷基，R4是具有4至18个碳原子并含有至少一个双键或三键的烃基。 R 5和R 6各自为具有2至18个碳原子的烷基或具有2至18个碳原子且含有至少一个双键或三键的烃基。 R5和R6中的至少一个含有至少一个双键或三键。 R5和R6总共具有20至44个碳原子。

    Magnetic recording medium having a lower layer containing a specified polyurethane binder
    6.
    发明授权
    Magnetic recording medium having a lower layer containing a specified polyurethane binder 失效
    具有含有特定聚氨酯粘合剂的下层的磁记录介质

    公开(公告)号：US5908691A

    公开(公告)日：1999-06-01

    申请号：US772575

    申请日：1996-12-26

    申请人： Yuichiro Murayama ,  Masaki Satake ,  Hiroshi Hashimoto ,  Tsutomu Okita

    发明人： Yuichiro Murayama ,  Masaki Satake ,  Hiroshi Hashimoto ,  Tsutomu Okita

    IPC分类号： C09D5/23 ,  C09D175/04 ,  G11B5/702 ,  G11B5/738

    CPC分类号： G11B5/738 ,  G11B5/7021 ,  Y10S428/90 ,  Y10T428/265 ,  Y10T428/31609

    摘要： The present invention provides a magnetic recording medium having high durability and excellent electromagnetic transfer characteristics and having a lower coating layer, which contains a binder and has high dispersion property and durability. The magnetic recording medium comprises a lower coating layer where non-magnetic powder or ferromagnetic power is dispersed in a binder and an upper magnetic layer where ferromagnetic powder is dispersed in a binder, said two layers being placed on a non-magnetic support member, whereby the binder of the lower coating layer comprises polyurethane resin, which is a reaction product using diol and organic diisocyanate as major materials, the polyurethane resin contains short-chain diol having cyclic structure by 17 to 40 weight %, and the polyurethane resin contains long-chain diol, containing ether groups by 1.0 to 5.0 mmol/g to the entire polyurethane resin, by 10 to 50 weight %.

    摘要翻译： 本发明提供一种具有高耐久性和优异的电磁传递特性的磁记录介质，并具有包含粘合剂并具有高分散性和耐久性的下涂层。 磁记录介质包括其中非磁性粉末或铁磁力分散在粘合剂中的下涂层和将铁磁性粉末分散在粘合剂中的上磁性层，所述两层位于非磁性支撑构件上，由此 下涂层的粘合剂包含聚氨酯树脂，其是使用二醇和有机二异氰酸酯作为主要材料的反应产物，所述聚氨酯树脂包含具有17至40重量％的环状结构的短链二醇，并且所述聚氨酯树脂包含长链， 链状二醇，含有醚基团，1.0〜5.0mmol / g，相对于整个聚氨酯树脂，为10〜50重量％。

    Magnetic recording medium
    7.
    发明授权
    Magnetic recording medium 失效
    磁记录介质

    公开(公告)号：US06376083B1

    公开(公告)日：2002-04-23

    申请号：US08532976

    申请日：1995-09-22

    申请人： Yuichiro Murayama ,  Masaki Satake ,  Hiroshi Hashimoto ,  Tsutomu Okita

    发明人： Yuichiro Murayama ,  Masaki Satake ,  Hiroshi Hashimoto ,  Tsutomu Okita

    IPC分类号： G11B5702

    CPC分类号： G11B5/7021 ,  Y10S428/90 ,  Y10T428/31609

    摘要： The present invention provides a magnetic recording medium having high dispersion property, good running durability and good preservation property, and it comprises at least one magnetic layer having ferromagnetic powder dispersed by a binder placed on a non-magnetic support member, whereby a polyurethane resin or a polyurethane urea resin consisting of 5 mol % or less of a long chain diol having weight average molecular weight of 800 to 5,000, a short chain diol having weight average molecular weight of 50 to 500 and/or a short chain diamine and an organic diisocyanate is contained as the binder, said long chain diol has one polar group selected from —COOM, —SO3M, —OSO3M, —OPO(OM)2, or —PO(OM)2 (where M represents a hydrogen atom, an alkali metal ion, or an ammonium ion) in the molecule, and the polar group is contained in the polyurethane by 1 to 5 mol %.

    摘要翻译： 本发明提供了具有高分散性，良好的运行耐久性和良好保存性的磁记录介质，并且它包括至少一个磁性层，该磁性层具有通过放置在非磁性支撑构件上的粘合剂分散的铁磁性粉末，由此聚氨酯树脂或 由5重量％以下的重均分子量为800〜5000的长链二醇，重均分子量为50〜500的短链二醇和/或短链二胺和有机二异氰酸酯组成的聚氨酯脲树脂 所述长链二醇具有一个选自-COOM，-SO3M，-OSO3M，-OPO（OM）2或-PO（OM）2的极性基团（其中M表示氢原子，碱金属 离子或铵离子），聚氨酯中的极性基团含有1〜5摩尔％。

    Magnetic recording medium
    9.
    发明授权
    Magnetic recording medium 失效
    磁记录介质

    公开(公告)号：US5747157A

    公开(公告)日：1998-05-05

    申请号：US705268

    申请日：1996-08-29

    申请人： Hiroshi Hashimoto ,  Yuichiro Murayama ,  Masaki Satake ,  Tsutomu Okita

    发明人： Hiroshi Hashimoto ,  Yuichiro Murayama ,  Masaki Satake ,  Tsutomu Okita

    IPC分类号： C09D5/23 ,  C09D175/08 ,  G11B5/702 ,  G11B5/738

    CPC分类号： G11B5/7021 ,  Y10S428/90 ,  Y10T428/26 ,  Y10T428/265

    摘要： The invention relates to a binder which improves the dispersibility of ferromagnetic powders and makes it possible to achieve a magnetic recording medium excellent in operation durability and storability, and a magnetic recording medium using such a binder. The invention provides a magnetic recording medium including a non-magnetic support substrate and a magnetic layer formed on said support substrate, said magnetic layer comprising a dispersion of ferromagnetic fine powders in a binder, wherein said binder comprises a polyurethane resin that is a reaction product obtained by using a polyol and an organic diisocyanate as main starting materials, said polyurethane resin containing as components of said polyol 15 to 40% by weight of a short-chain diol component having a cyclic structure, and 10 to 50% by weight of a long-chain polyether polyol component, and further including a polar group-containing long-chain polyol component having a molecular weight of 500 to 5,000.

    摘要翻译： 本发明涉及一种提高铁磁性粉末的分散性的粘合剂，能够实现操作耐久性和保存性优异的磁记录介质，以及使用这种粘合剂的磁记录介质。 本发明提供了一种磁记录介质，其包括非磁性支撑基板和形成在所述支撑基板上的磁性层，所述磁性层包含铁磁细粉末在粘合剂中的分散体，其中所述粘合剂包括作为反应产物的聚氨酯树脂 通过使用多元醇和有机二异氰酸酯作为主要原料，所述聚氨酯树脂作为所述多元醇的组分含有15〜40重量％的具有环状结构的短链二醇组分和10〜50重量％的 长链聚醚多元醇成分，还含有分子量为500〜5000的含极性基团的长链多元醇成分。