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    Non-magnetic undercoating layer for magnetic recording medium, magnetic recording medium and non-magnetic particles
    2.
    发明授权
    Non-magnetic undercoating layer for magnetic recording medium, magnetic recording medium and non-magnetic particles 失效
    用于磁记录介质的非磁性底涂层，磁记录介质和非磁性颗粒

    公开(公告)号：US5830557A

    公开(公告)日：1998-11-03

    申请号：US392199

    申请日：1995-02-22

    申请人： Kazuyuki Hayashi ,  Keisuke Iwasaki ,  Yasuyuki Tanaka ,  Minoru Ohsugi ,  Hiroko Morii ,  Mineko Sakoda ,  Norio Sugita ,  Masaaki Maekawa

    发明人： Kazuyuki Hayashi ,  Keisuke Iwasaki ,  Yasuyuki Tanaka ,  Minoru Ohsugi ,  Hiroko Morii ,  Mineko Sakoda ,  Norio Sugita ,  Masaaki Maekawa

    IPC分类号： G11B5/733 ,  G11B5/738 ,  G11B5/66 ,  G11B5/70

    CPC分类号： G11B5/738 ,  G11B5/733 ,  Y10S428/90 ,  Y10T428/24372 ,  Y10T428/2438 ,  Y10T428/24388 ,  Y10T428/265 ,  Y10T428/2991 ,  Y10T428/2993 ,  Y10T428/2995

    摘要： The disclosure describes a non-magnetic undercoating layer for a magnetic recording medium, coated on the surface of a non-magnetic substrate comprising: non-magnetic particles selected from the group consisting of particles (1) and (2): (1) coated acicular or spindle-shaped .alpha.-Fe.sub.2 O.sub.3 particles which are produced by adhering not less than 0.01 to 20 wt % (calculated as Al, SiO.sub.2 or Al and SiO.sub.2, and based on acicular or spindle-shaped .alpha.-Fe.sub.2 O.sub.3 particles as a core material) of an oxide or a hydroxide containing Al, Si or both Al and Si to the surfaces of acicular or spindle-shaped .alpha.-Fe.sub.2 O.sub.3 particles as a core material, and have a molecular weight-dependent parameter .alpha. represented by the following formula of not less than 0.5: As=K.sub.1 .multidot.M.sup..alpha. wherein M represents the number-average molecular weight of a binder resin, As represents the saturation adsorption of said binder resin, and K.sub.1 represents a constant used for measuring As and dependent on the binder resin and a solvent, (2) BaO.multidot.4.5Fe.sub.2 O.sub.3 particles having an average particle diameter of not more than 0.1 .mu.m; and a binder resin.

    摘要翻译： 本发明描述了一种涂覆在非磁性基材表面上的用于磁记录介质的非磁性底涂层，包括：选自颗粒（1）和（2）的非磁性颗粒：（1）涂覆 通过粘附不小于0.01至20重量％（以Al，SiO 2或Al和SiO 2计算，并以针状或纺锤形α-Fe2O3颗粒为核心材料）制备的针状或纺锤状α-Fe2O3颗粒， 含有Al，Si或Al和Si的氧化物或氢氧化物作为核心材料的针状或纺锤形α-Fe2O3颗粒的表面，并且具有不低于下列公式的分子量依赖参数α 比0.5：As =K1xMα其中M表示粘合剂树脂的数均分子量，As表示所述粘合剂树脂的饱和吸附，K1表示用于测量As的常数，并且取决于粘合剂树脂和溶剂， （ 2）平均粒径不大于0.1μm的BaO x 4.5 Fe 2 O 3粒子; 和粘合剂树脂。

    Non-magnetic undercoat layer for magnetic recording medium, magnetic recording medium and non-magnetic particles
    3.
    发明授权
    Non-magnetic undercoat layer for magnetic recording medium, magnetic recording medium and non-magnetic particles 失效
    用于磁记录介质的非磁性底涂层，磁记录介质和非磁性颗粒

    公开(公告)号：US5604015A

    公开(公告)日：1997-02-18

    申请号：US240512

    申请日：1994-05-10

    申请人： Kazuyuki Hayashi ,  Keisuke Iwasaki ,  Yasuyuki Tanaka ,  Minoru Ohsugi ,  Hiroko Morii ,  Mineko Sakoda ,  Norio Sugita ,  Masaaki Maekawa

    发明人： Kazuyuki Hayashi ,  Keisuke Iwasaki ,  Yasuyuki Tanaka ,  Minoru Ohsugi ,  Hiroko Morii ,  Mineko Sakoda ,  Norio Sugita ,  Masaaki Maekawa

    IPC分类号： G11B5/733 ,  G11B5/738 ,  B32B33/00 ,  G11B5/66 ,  G11B5/70

    CPC分类号： G11B5/738 ,  G11B5/733 ,  Y10S428/90 ,  Y10T428/24372 ,  Y10T428/2438 ,  Y10T428/24388 ,  Y10T428/265 ,  Y10T428/2991 ,  Y10T428/2993 ,  Y10T428/2995

    摘要： The disclosure describes a non-magnetic undercoating layer for a magnetic recording medium, coated on the surface of a non-magnetic substrate comprising:non-magnetic particles selected from the group consisting of particles (1) and (2):(1) coated acicular or spindle-shaped .alpha.-Fe.sub.2 O.sub.3 particles which are produced by adhering not less than 0.01 to 20 wt % (calculated as Al, SiO.sub.2 or Al and SiO.sub.2, and based on acicular or spindle-shaped .alpha.-Fe.sub.2 O.sub.3 particles as a core material) of an oxide or a hydroxide containing Al, Si or both Al and Si to the surfaces of acicular or spindle-shaped .alpha.-Fe.sub.2 O.sub.3 particles as a core material, and have a molecular weight-dependent parameter .alpha. represented by the following formula of not less than 0.5:As=K.sub.1 .multidot.M.sup..alpha.wherein M represents the number-average molecular weight of a binder resin, As represents the saturation adsorption of said binder resin, and K.sub.1 represents a constant used for measuring As and dependent on the binder resin and a solvent,(2) BaO.4.5Fe.sub.2 O.sub.3 particles having an average particle diameter of not more than 0.1 .mu.m; anda binder resin.

    摘要翻译： 本发明描述了一种涂覆在非磁性基材表面上的用于磁记录介质的非磁性底涂层，包括：选自颗粒（1）和（2）的非磁性颗粒：（1）涂覆 通过粘附不小于0.01至20重量％（以Al，SiO 2或Al和SiO 2计算，并以针状或纺锤形α-Fe2O3颗粒为核心材料）制备的针状或纺锤状α-Fe2O3颗粒， 含有Al，Si或Al和Si的氧化物或氢氧化物作为核心材料的针状或纺锤形α-Fe2O3颗粒的表面，并且具有不低于下列公式的分子量依赖参数α 比0.5：As =K1xMα其中M表示粘合剂树脂的数均分子量，As表示所述粘合剂树脂的饱和吸附，K1表示用于测量As的常数，并且取决于粘合剂树脂和溶剂， （ 2）平均粒径不大于0.1μm的BaO.4.5Fe2O3颗粒; 和粘合剂树脂。

    Non-magnetic coated particles having a defined parameter .alpha. of not less than 0.5
    4.
    发明授权
    Non-magnetic coated particles having a defined parameter .alpha. of not less than 0.5 失效
    具有不小于0.5的限定参数α的非磁性涂覆颗粒

    公开(公告)号：US5882795A

    公开(公告)日：1999-03-16

    申请号：US392259

    申请日：1995-02-22

    申请人： Kazuyuki Hayashi ,  Keisuke Iwasaki ,  Yasuyuki Tanaka ,  Minoru Ohsugi ,  Hiroko Morii ,  Mineko Sakoda ,  Norio Sugita ,  Masaaki Maekawa

    发明人： Kazuyuki Hayashi ,  Keisuke Iwasaki ,  Yasuyuki Tanaka ,  Minoru Ohsugi ,  Hiroko Morii ,  Mineko Sakoda ,  Norio Sugita ,  Masaaki Maekawa

    IPC分类号： G11B5/733 ,  G11B5/738 ,  B32B1/00

    CPC分类号： G11B5/738 ,  G11B5/733 ,  Y10S428/90 ,  Y10T428/24372 ,  Y10T428/2438 ,  Y10T428/24388 ,  Y10T428/265 ,  Y10T428/2991 ,  Y10T428/2993 ,  Y10T428/2995

    摘要： The disclosure describes a non-magnetic undercoating layer for a magnetic recording medium, coated on the surface of a non-magnetic substrate comprising:non-magnetic particles selected from the group consisting of particles (1) and (2):(1) coated acicular or spindle-shaped .alpha.-Fe.sub.2 O.sub.3 particles which are produced by adhering not less than 0.01 to 20 wt % (calculated as Al, SiO.sub.2 or Al and SiO.sub.2, and based on acicular or spindle-shaped .alpha.-Fe.sub.2 O.sub.3 particles as a core material) of an oxide or a hydroxide containing Al, Si or both Al and Si to the surfaces of acicular or spindle-shaped .alpha.-Fe.sub.2 O.sub.3 particles as a core material, and have a molecular weight-dependent parameter .alpha. represented by the following formula of not less than 0.5:As=K.sub.1 .multidot.M.sup..alpha. wherein M represents the number-average molecular weight of a binder resin, As represents the saturation adsorption of said binder resin, and K.sub.1 represents a constant used for measuring As and dependent on the binder resin and a solvent,(2) BaO.4.5Fe.sub.2 O.sub.3 particles having an average particle diameter of not more than 0.1 .mu.m; anda binder resin.

    摘要翻译： 本发明描述了一种涂覆在非磁性基材表面上的用于磁记录介质的非磁性底涂层，包括：选自颗粒（1）和（2）的非磁性颗粒：（1）涂覆 通过粘附不小于0.01至20重量％（以Al，SiO 2或Al和SiO 2计算，并以针状或纺锤形α-Fe2O3颗粒为核心材料）制备的针状或纺锤状α-Fe2O3颗粒， 含有Al，Si或Al和Si的氧化物或氢氧化物作为核心材料的针状或纺锤形α-Fe2O3颗粒的表面，并且具有不低于下列公式的分子量依赖参数α 比0.5：As =K1xMα其中M表示粘合剂树脂的数均分子量，As表示所述粘合剂树脂的饱和吸附，K1表示用于测量As的常数，并且取决于粘合剂树脂和溶剂， （ 2）平均粒径不大于0.1μm的BaO.4.5Fe2O3颗粒; 和粘合剂树脂。

    Rubber or resin composition
    5.
    发明授权
    Rubber or resin composition 失效
    橡胶或树脂组合物

    公开(公告)号：US5693690A

    公开(公告)日：1997-12-02

    申请号：US628018

    申请日：1996-04-04

    申请人： Kazuyuki Hayashi ,  Minoru Ohsugi ,  Hiroko Morii ,  Koso Aoki

    发明人： Kazuyuki Hayashi ,  Minoru Ohsugi ,  Hiroko Morii ,  Koso Aoki

    IPC分类号： C08K3/08 ,  B32B15/02 ,  C08K3/00 ,  C08K3/18 ,  C08K3/22 ,  C08K9/02 ,  C08L21/00 ,  C09C1/22 ,  C09C1/24 ,  C09C1/34 ,  C08K9/06 ,  C08K3/36 ,  C08K9/10

    CPC分类号： C08K3/22 ,  C08K9/02 ,  C09C1/24 ,  C01P2004/03 ,  C01P2004/04 ,  C01P2004/32 ,  C01P2004/38 ,  C01P2004/51 ,  C01P2004/61 ,  C01P2006/10 ,  C01P2006/12 ,  C01P2006/19 ,  C01P2006/60 ,  C01P2006/80 ,  Y10T428/2991 ,  Y10T428/2993

    摘要： A rubber or resin composition comprises: 0.1 to 10.0 parts by weight of iron oxide particles composed of iron oxide core which contains 0.21 to 2.14 wt % of silicon, calculated as SiO.sub.2, and 0.01 to 10.0 wt %, calculated as SiO.sub.2, of a precipitate composed of silicon, which adheres to the surfaces of said iron oxide core, a sphere ratio, maximum diameter/minimum diameter, of said iron oxide particles being of 0.7 to 1.0, an average particle diameter of said iron oxide particles being 0.05 to 1.0 .mu.m, a geometric standard deviation .sigma.g of said iron oxide particles which shows the particle size distribution being not more than 1.40, a bulk density of said iron oxide particles being 0.80 to 1.5 g/cm.sup.3, and a surface activity of said iron oxide particles which is indicated by the number of cyclohexanone molecules adsorbed to the surfaces of the iron oxide particles, number of molecules/nm.sup.2, being not more than 1.70; and 90 to 99.9 parts by weight of rubber or thermoplastic resin.

    摘要翻译： 橡胶或树脂组合物包含：0.1至10.0重量份由氧化铁芯组成的氧化铁颗粒，其含有0.21至2.14重量％的硅，以SiO 2计，和0.01至10.0重量％，以SiO 2计，沉淀物 由氧化铁芯的表面附着的硅构成，所述氧化铁粒子的球体比，最大直径/最小直径为0.7〜1.0，所述氧化铁粒子的平均粒径为0.05〜1.0μm m，所述氧化铁颗粒的几何标准偏差σg，其显示出不大于1.40的粒度分布，所述氧化铁颗粒的堆积密度为0.80至1.5g / cm 3，所述氧化铁颗粒的表面活性 其由吸附在氧化铁颗粒表面上的环己酮分子的数目表示，分子数/ nm 2不大于1.70; 和90〜99.9重量份的橡胶或热塑性树脂。

    Iron oxide particles
    6.
    发明授权
    Iron oxide particles 失效
    氧化铁颗粒

    公开(公告)号：US5922464A

    公开(公告)日：1999-07-13

    申请号：US908984

    申请日：1997-08-08

    申请人： Kazuyuki Hayashi ,  Minoru Ohsugi ,  Hiroko Morii ,  Koso Aoki

    发明人： Kazuyuki Hayashi ,  Minoru Ohsugi ,  Hiroko Morii ,  Koso Aoki

    IPC分类号： C08K3/08 ,  B32B15/02 ,  C08K3/00 ,  C08K3/18 ,  C08K3/22 ,  C08K9/02 ,  C08L21/00 ,  C09C1/22 ,  C09C1/24 ,  C09C1/34

    CPC分类号： C08K3/22 ,  C08K9/02 ,  C09C1/24 ,  C01P2004/03 ,  C01P2004/04 ,  C01P2004/32 ,  C01P2004/38 ,  C01P2004/51 ,  C01P2004/61 ,  C01P2006/10 ,  C01P2006/12 ,  C01P2006/19 ,  C01P2006/60 ,  C01P2006/80 ,  Y10T428/2991 ,  Y10T428/2993

    摘要： A rubber or resin composition comprises:0.1 to 10.0 parts by weight of iron oxide particles composed of iron oxide core which contains 0.21 to 2.14 wt % of silicon, calculated as SiO.sub.2, and 0.01 to 10.0 wt %, calculated as SiO.sub.2, of a precipitate composed of silicon, which adheres to the surfaces of said iron oxide core, a sphere ratio, maximum diameter/ minimum diameter, of said iron oxide particles being of 0.7 to 1.0, an average particle diameter of said iron oxide particles being 0.05 to 1.0 .mu.m, a geometric standard deviation .sigma.g of said iron oxide particles which shows the particle size distribution being not more than 1.40, a bulk density of said iron oxide particles being 0.80 to 1.5 g/cm.sup.3, and a surface activity of said iron oxide particles which is indicated by the number of cyclohexanone molecules adsorbed to the surfaces of the iron oxide particles, number of molecules/nm.sup.2, being not more than 1.70; and90 to 99.9 parts by weight of rubber or thermoplastic resin.

    摘要翻译： 橡胶或树脂组合物包含：0.1至10.0重量份由氧化铁芯组成的氧化铁颗粒，其含有0.21至2.14重量％的硅，以SiO 2计，和0.01至10.0重量％，以SiO 2计，沉淀物 由氧化铁芯的表面附着的硅构成，所述氧化铁粒子的球体比，最大直径/最小直径为0.7〜1.0，所述氧化铁粒子的平均粒径为0.05〜1.0μm m，所述氧化铁颗粒的几何标准偏差σg，其显示出不大于1.40的粒度分布，所述氧化铁颗粒的堆积密度为0.80至1.5g / cm 3，所述氧化铁颗粒的表面活性 其由吸附在氧化铁颗粒表面上的环己酮分子的数目表示，分子数/ nm 2不大于1.70; 和90〜99.9重量份的橡胶或热塑性树脂。

    Magnetic particles for magnetic recording medium and process for producing the same
    7.
    发明授权
    Magnetic particles for magnetic recording medium and process for producing the same 失效
    用于磁记录介质的磁性颗粒及其制造方法

    公开(公告)号：US5543069A

    公开(公告)日：1996-08-06

    申请号：US509607

    申请日：1995-07-31

    申请人： Kazuyuki Hayashi ,  Minoru Ohsugi ,  Hiroko Morii ,  Norio Sugita

    发明人： Kazuyuki Hayashi ,  Minoru Ohsugi ,  Hiroko Morii ,  Norio Sugita

    IPC分类号： B22F1/02 ,  C01G49/00 ,  G11B5/712 ,  H01F1/11 ,  C04B35/26

    CPC分类号： G11B5/712 ,  Y10T428/2993

    摘要： Disclosed herein magnetic particles for magnetic recording which comprise acicular or plate-like magnetic particles and not less than 0.01 wt % (calculated as Al, SiO.sub.2 or Al and SiO.sub.2 and based on the acicular or plate-like magnetic particles) of an oxide or hydroxide containing Al, Si or both Al and Si and adhered to the surfaces of the acicular or plate-like magnetic particles, and which have not less than 0.50 of a molecular-weight-dependent parameter .alpha. represented by the following formula (I):As=K.sub.1 .multidot.M.sup..alpha. (I)wherein M represents a number-average molecular weight of a binder, As represents a saturation adsorption of said binder, and K.sub.1 represents a constant dependent on the binder and a solvent used for measuring As.

    摘要翻译： 本文公开了包含针状或板状磁性颗粒的磁性颗粒，并且不少于0.01重量％（以Al，SiO 2或Al和SiO 2计算，并且基于针状或板状磁性颗粒）氧化物或氢氧化物 含有Al，Si或Al和Si两者，并且粘附到针状或板状磁性颗粒的表面，并且具有不低于0.50的由下式（I）表示的分子量依赖性参数α：As =K1xMα（I）其中M表示粘合剂的数均分子量，As表示所述粘合剂的饱和吸附，K1表示取决于粘合剂和用于测量As的溶剂的常数。

    Magnetic particles for magnetic recording medium and process for producing the same
    8.
    发明授权
    Magnetic particles for magnetic recording medium and process for producing the same 失效
    用于磁记录介质的磁性颗粒及其制造方法

    公开(公告)号：US5484545A

    公开(公告)日：1996-01-16

    申请号：US149834

    申请日：1993-11-10

    申请人： Kazuyuki Hayashi ,  Minoru Ohsugi ,  Hiroko Morii ,  Norio Sugita

    发明人： Kazuyuki Hayashi ,  Minoru Ohsugi ,  Hiroko Morii ,  Norio Sugita

    IPC分类号： B22F1/02 ,  C01G49/00 ,  G11B5/712 ,  H01F1/11 ,  C04B35/26 ,  B32B18/00

    CPC分类号： G11B5/712 ,  Y10T428/2993

    摘要： Disclosed herein magnetic particles for magnetic recording which comprise acicular or plate-like magnetic particles and not less than 0.01 wt % (calculated as Al, SiO.sub.2 or Al and SiO.sub.2 and based on the acicular or plate-like magnetic particles) of an oxide or hydroxide containing Al, Si or both Al and Si and adhered to the surfaces of the acicular or plate-like magnetic particles, and which have not less than 0.50 of a molecular-weight-dependent parameter .alpha. represented by the following formula (I):As=K.sub.1 .multidot.M.sup..alpha. (I)wherein M represents a number-average molecular weight of a binder, As represents a saturation adsorption of said binder, and K.sub.1 represents a constant dependent on the binder and a solvent used for measuring As.

    摘要翻译： 本文公开了包含针状或板状磁性颗粒的磁性颗粒，并且不少于0.01重量％（以Al，SiO 2或Al和SiO 2计算，并且基于针状或板状磁性颗粒）氧化物或氢氧化物 含有Al，Si或Al和Si两者，并且粘附到针状或板状磁性颗粒的表面，并且具有不低于0.50的由下式（I）表示的分子量依赖性参数α：As =K1xMα（I）其中M表示粘合剂的数均分子量，As表示所述粘合剂的饱和吸附，K1表示取决于粘合剂和用于测量As的溶剂的常数。