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    Magnetic recording medium containing ferro magnetic powder, polar group containing resins in a specific ratio and carbon black of a specific size range
    55.
    发明授权
    Magnetic recording medium containing ferro magnetic powder, polar group containing resins in a specific ratio and carbon black of a specific size range 失效
    含有铁磁粉末，特定比例的含极性基团的树脂和特定尺寸范围的炭黑的磁记录介质

    公开(公告)号：US5126202A

    公开(公告)日：1992-06-30

    申请号：US190846

    申请日：1988-05-06

    申请人： Hiroo Inaba ,  Takeshi Kakuta ,  Koichi Yamauchi ,  Akihiro Matsufuji

    发明人： Hiroo Inaba ,  Takeshi Kakuta ,  Koichi Yamauchi ,  Akihiro Matsufuji

    IPC分类号： C09D5/23 ,  C09D127/04 ,  C09D127/06 ,  C09D175/00 ,  C09D175/04 ,  G11B5/702 ,  G11B5/708 ,  G11B5/714

    CPC分类号： G11B5/7023 ,  G11B5/708 ,  G11B5/714 ,  Y10S428/90 ,  Y10T428/2982 ,  Y10T428/31609

    摘要： A magnetic recording medium comprising a nonmagnetic support having provided thereon a magnetic layer comprising a ferromagnetic powder dispersed in a binder, wherein said ferromagnetic powder has a specific surface area of 40 m.sup.2 /g or more as measured by the BET method; said magnetic layer further comprises carbon black having an average particle diameter of from about 20 to 120 m.mu.; and said binder comprises the combination of (1) a vinyl chloride resin containing a phosphate ester group represented by ##STR1## wherein M.sub.1 and M.sub.2, which may be the same or different, each represents Na, K, Li, H, N.sym.R.sub.3, or N.sym.HR.sub.2 wherein R represents an alkyl group or a hydrogen atom, and (2) at least one resin other than said vinyl chloride resin containing at least one of --SO.sub.3 M, --OSO.sub.2 M, --COOM, and ##STR2## wherein M, M.sub.1, and M.sub.2, which may be the same or different, each represents Na, K, Li, H, N.sup.4 .sym. R.sub.3, or N.sup..sym. HR.sub.2 wherein R represents an alkyl group or a hydrogen atom; provided that the weight ratio of said resin other than said vinyl chloride resin to said vinyl chloride resin is from about 0.4 to 2.5.

    摘要翻译： 一种包含非磁性载体的磁记录介质，其上设置有包含分散在粘合剂中的铁磁性粉末的磁性层，其中所述铁磁性粉末通过BET法测量的比表面积为40m 2 / g以上; 所述磁性层还包含平均粒径为约20至120μm的炭黑; 并且所述粘合剂包含（1）含有由下式表示的磷酸酯基的氯乙烯树脂的组合，其中M1和M2可以相同或不同，各自表示Na，K，Li，H，N（+ ）R3或N（+）HR2，其中R表示烷基或氢原子，和（2）至少一种除所述氯乙烯树脂以外的至少一种树脂，其含有-SO 3 M，-OSO 2 M，-COOM， 其中M，M1和M2可以相同或不同，分别表示Na，K，Li，H，N4（+）R3或N（+）HR2，其中R表示烷基或氢原子 ; 所述氯乙烯树脂以外的所述树脂与所述氯乙烯树脂的重量比为约0.4〜2.5。

    Magnetic recording medium
    56.
    发明授权
    Magnetic recording medium 失效
    磁记录介质

    公开(公告)号：US5112680A

    公开(公告)日：1992-05-12

    申请号：US185214

    申请日：1988-04-25

    申请人： Hiroo Inaba ,  Takeshi Kakuta ,  Koichi Yamauchi ,  Akihiro Matsufuji

    发明人： Hiroo Inaba ,  Takeshi Kakuta ,  Koichi Yamauchi ,  Akihiro Matsufuji

    IPC分类号： C09D5/23 ,  C09D127/04 ,  C09D127/06 ,  C09D175/00 ,  C09D175/04 ,  G11B5/702 ,  G11B5/708 ,  G11B5/714

    CPC分类号： G11B5/7085 ,  G11B5/7023 ,  G11B5/714 ,  Y10S428/90 ,  Y10T428/257 ,  Y10T428/30

    摘要： A magnetic recording medium comprising a nonmagnetic support having provided thereon a magnetic layer comprising a ferromagnetic powder dispersed in a binder, wherein said ferromagnetic powder has a specific surface area of 40 m.sup.2 /g or more as measured by the BET method; said magnetic layer further comprises Al.sub.2 O.sub.3 particles having an average particle diameter of from about 0.1 to 0.5 .mu.m; and said binder comprises the combination of (1) a vinyl chloride resin containing a phosphate ester group represented by ##STR1## wherein M.sub.1 and M.sub.2, which may be the same or different, each represents Na, K, Li, H, N.sym.R.sub.3, or N.sym.HR.sub.2 wherein R represents an alkyl group or a hydrogen atom, and (2) at least one resin other than said vinyl chloride resin containing at least one of --SO.sub.3 M, --OSO.sub.2 M, --COOM, and ##STR2## wherein M, M.sub.1, and M.sub.2, which may be the same or different, each represents Na, K, Li, H, N.sym.R.sub.3, or N.sym.HR.sub.2 wherein R represents an alkyl group or a hydrogen atom; provided that the weight ratio of said resin other than said vinyl chloride resin to said vinyl chloride resin is from about 0.4 to 2.5.

    摘要翻译： 一种包含非磁性载体的磁记录介质，其上设置有包含分散在粘合剂中的铁磁性粉末的磁性层，其中所述铁磁性粉末通过BET法测量的比表面积为40m 2 / g以上; 所述磁性层还包含平均粒径为约0.1至0.5μm的Al 2 O 3颗粒; 并且所述粘合剂包含（1）含有由下式表示的磷酸酯基的氯乙烯树脂的组合，其中M1和M2可以相同或不同，各自表示Na，K，Li，H，N（+ ）R3或N（+）HR2，其中R表示烷基或氢原子，和（2）至少一种除了含有-SO 3 M，-OSO 2 M，-COOM和 其中M，M1和M2可以相同或不同，分别表示Na，K，Li，H，N（+）R3或N（+）HR2，其中R表示烷基或氢原子 ; 所述氯乙烯树脂以外的所述树脂与所述氯乙烯树脂的重量比为约0.4〜2.5。

    Magnetic recording medium
    58.
    发明授权
    Magnetic recording medium 失效
    磁记录介质

    公开(公告)号：US5013602A

    公开(公告)日：1991-05-07

    申请号：US247211

    申请日：1988-09-21

    申请人： Nobuo Yamazaki ,  Hiroo Inaba ,  Kouichi Masaki

    发明人： Nobuo Yamazaki ,  Hiroo Inaba ,  Kouichi Masaki

    IPC分类号： C09D5/23 ,  G11B5/702 ,  G11B5/708

    CPC分类号： G11B5/7023 ,  G11B5/702 ,  Y10S428/90 ,  Y10T428/25 ,  Y10T428/257

    摘要： A magnetic recording medium is described, comprising a nonmagnetic support having thereon a single magnetic layer or plural magnetic layers containing ferromagnetic particles dispersed in a binder, wherein said ferromagnetic particles are ferromagnetic particles of the magnetic iron oxide type having an adsorption amount of stearic acid of from 3.times.10.sup.-6 to 6.times.10.sup.-6 mol/m.sup.2 per a surface area thereof; said binder contains at least one polymer having at least one polar group selected from the group consisting of --SO.sub.3 M, --OSO.sub.3 M, --OPO(OM').sub.2, --COOM and --PO(OM').sub.2, in which M represents Na, Li, K, a hydrogen atom, NR.sub.4 or NHR.sub.3, M' represents Na, Li, K, a hydrogen atom, NR.sub.4, NHR.sub.3 or an alkyl group, and R.sub.3 and R.sub.4 represent a lower alkyl group; and said magnetic layer further contains at least one fatty acid.

    摘要翻译： 描述了一种磁记录介质，其包括其上具有单个磁性层的非磁性载体或包含分散在粘合剂中的铁磁性颗粒的多个磁性层，其中所述铁磁性颗粒是磁性氧化铁类型的铁磁性颗粒，其具有 每个表面积为3×10 -6至6×10 -6 mol / m 2; 所述粘合剂含有至少一种具有选自-SO 3 M，-OSO 3 M，-OPO（OM'）2，-COOM和-PO（OM'）2中的至少一个极性基团的聚合物，其中M表示Na， Li，K，氢原子，NR4或NHR3，M'表示Na，Li，K，氢原子，NR4，NHR3或烷基，R3和R4表示低级烷基; 并且所述磁性层还含有至少一种脂肪酸。

    Resin used for magnetic recording media and a method for the production of the same
    59.
    发明授权
    Resin used for magnetic recording media and a method for the production of the same 失效
    用于磁记录介质的树脂及其制造方法

    公开(公告)号：US4996272A

    公开(公告)日：1991-02-26

    申请号：US371400

    申请日：1989-06-26

    申请人： Takeshi Nakachi ,  Akio Hata ,  Yoshihisa Watanabe

    发明人： Takeshi Nakachi ,  Akio Hata ,  Yoshihisa Watanabe

    IPC分类号： C08F2/06 ,  G11B5/702

    CPC分类号： G11B5/7023 ,  Y10S428/90 ,  Y10T428/31797

    摘要： A resin used for magnetic recording media, comprising a vinyl chloride copolymer containing vinyl monomers with hydroxyl groups and vinyl monomers with quaternary ammonium salt groups as component units. The resin is made by a method which comprises polymerizing an organic solvent solution containing vinyl chloride, vinyl monomers with hydroxyl groups and vinyl monomers with quaternary ammonium salt groups in a reacting apparatus to thereby precipitate a vinyl chloride copolymer, the interior surface of said reacting apparatus, which comes into contact with said organic solvent solution being coated with a fluororesin.

    摘要翻译： 用于磁记录介质的树脂，其包含含有具有羟基的乙烯基单体的氯乙烯共聚物和具有季铵盐基团的乙烯基单体作为组分单元。 该树脂通过包括在反应设备中聚合含有氯乙烯的有机溶剂溶液，具有羟基的乙烯基单体和乙烯基单体与季铵盐基团以使氯乙烯共聚物沉淀出来的方法制成，所述反应设备的内表面 其与所述涂覆有氟树脂的有机溶剂溶液接触。

    Magnetic coating and magnetic recording medium
    60.
    发明授权
    Magnetic coating and magnetic recording medium 失效
    磁性涂层和磁记录介质

    公开(公告)号：US4983311A

    公开(公告)日：1991-01-08

    申请号：US425963

    申请日：1989-10-24

    申请人： Eitaro Nakamura ,  Masahiro Yamakawa ,  Akira Nakayama ,  Fumio Takano

    发明人： Eitaro Nakamura ,  Masahiro Yamakawa ,  Akira Nakayama ,  Fumio Takano

    IPC分类号： C09D5/23 ,  G11B5/702

    CPC分类号： G11B5/7023 ,  Y10S428/90 ,  Y10T428/2991 ,  Y10T428/31938

    摘要： A magnetic coating comprising magnetic powder, a binder and an organic solvent, characterized in that at least one component of the binder is a vinyl chloride copolymer having hydroxyl group, and carboxylic acid groups or sulfur- or phosphorus-containing strong acid radicals, and the comonomer supplying the hydroxyl groups is a monoallyl ether of polyhydroxy compound, and a magnetic recording medium made by coating a substrate with the magnetic coating.

    摘要翻译： 一种包含磁性粉末，粘合剂和有机溶剂的磁性涂层，其特征在于粘合剂的至少一种组分是具有羟基的氯乙烯共聚物和羧酸基团或含硫或磷的强酸基，和 供给羟基的共聚单体是多羟基化合物的单烯丙基醚，以及通过用磁性涂层涂布基材而制成的磁记录介质。