公开(公告)号：US6063490A

公开(公告)日：2000-05-16

申请号：US132759

申请日：1998-08-12

申请人： Kazuyuki Hayashi ,  Keisuke Iwasaki ,  Toshiharu Harada ,  Hiroko Morii

发明人： Kazuyuki Hayashi ,  Keisuke Iwasaki ,  Toshiharu Harada ,  Hiroko Morii

IPC分类号： C09C1/24 ,  G11B5/708 ,  G11B5/738 ,  B32B5/16 ,  G11B5/58

CPC分类号： B82Y30/00 ,  C09C1/24 ,  G11B5/708 ,  G11B5/738 ,  C01P2004/03 ,  C01P2004/10 ,  C01P2004/20 ,  C01P2004/38 ,  C01P2004/51 ,  C01P2004/54 ,  C01P2004/62 ,  C01P2004/64 ,  C01P2004/84 ,  C01P2004/86 ,  C01P2006/10 ,  C01P2006/12 ,  C01P2006/22 ,  C01P2006/42 ,  C01P2006/60 ,  C01P2006/90 ,  Y10T428/256 ,  Y10T428/257 ,  Y10T428/259 ,  Y10T428/2991 ,  Y10T428/2993

摘要： A magnetic recording medium of the present invention comprises: a base film; a non-magnetic undercoat layer formed on said base film and comprising a binder resin and non-magnetic acicular particles containing iron as a main component, comprising iron and titanium of 0.05 to 50% by weight, calculated as Ti, based on the total weight of the particles, which is present within the particle; and a magnetic recording layer formed on said non-magnetic undercoat layer and comprising magnetic particles and a binder resin. Such a magnetic recording medium has a low light transmittance, an excellent smooth surface, a high mechanical strength and an excellent durability.

摘要翻译： 本发明的磁记录介质包括：基膜; 形成在所述基底膜上的非磁性底涂层，其包含粘合剂树脂和以铁为主要成分的非磁性针状颗粒，所述非磁性针状颗粒包含以Ti计算的0.05至50重量％的铁和钛，基于总重量 存在于颗粒内的颗粒; 以及形成在所述非磁性底涂层上并包含磁性颗粒和粘合剂树脂的磁记录层。 这种磁记录介质具有低的透光率，优异的光滑表面，高的机械强度和优异的耐久性。

公开(公告)号：US20100035087A1

公开(公告)日：2010-02-11

申请号：US12535978

申请日：2009-08-05

申请人： Hiroko Morii ,  Keisuke Iwasaki ,  Seiji Ishitani ,  Mineko Ohsugi ,  Shinji Horie ,  Toshiharu Harada ,  Takehiro Matsuo ,  Yosuke Yamamoto ,  Kazuyuki Hayashi

发明人： Hiroko Morii ,  Keisuke Iwasaki ,  Seiji Ishitani ,  Mineko Ohsugi ,  Shinji Horie ,  Toshiharu Harada ,  Takehiro Matsuo ,  Yosuke Yamamoto ,  Kazuyuki Hayashi

IPC分类号： G11B5/712 ,  B22F9/20 ,  B32B15/02

CPC分类号： G11B5/714 ,  B22F1/0025 ,  B22F9/22 ,  B22F2998/10 ,  B82Y30/00 ,  C22C2202/02 ,  G11B5/70642 ,  Y10T428/12014 ,  B22F2201/05 ,  B22F2201/013

摘要： The present invention relates to ferromagnetic metal particles having an average major axis diameter (L) of 10 to 100 nm which satisfy a relationship between the average major axis diameter (L) and a particle SFD represented by the following formula: Particle SFD≦0.0001 L2−0.0217 L+1.75; a process for producing the ferromagnetic metal particles; and a magnetic recording medium using the ferromagnetic metal particles.

摘要翻译： 本发明涉及平均长轴直径（L）为10〜100nm的强磁性金属颗粒，其满足平均长轴直径（L）和由下式表示的颗粒SFD之间的关系：颗粒SFD 产生铁磁金属颗粒; 以及使用该强磁性金属粒子的磁记录介质。

公开(公告)号：US06863966B1

公开(公告)日：2005-03-08

申请号：US09710834

申请日：2000-11-14

申请人： Kazuyuki Hayashi ,  Hiroko Morii ,  Mamoru Kamigaki ,  Yasuyuki Tanaka ,  Keisuke Iwasaki

发明人： Kazuyuki Hayashi ,  Hiroko Morii ,  Mamoru Kamigaki ,  Yasuyuki Tanaka ,  Keisuke Iwasaki

IPC分类号： G11B5/712 ,  G11B5/66 ,  B32B3/00 ,  B32B3/02 ,  B32B5/16 ,  B32B9/00

CPC分类号： G11B5/712 ,  Y10S428/90 ,  Y10S428/926 ,  Y10T428/257 ,  Y10T428/26 ,  Y10T428/2995

摘要： A magnetic recording medium comprises: a non-magnetic base film; and a magnetic recording layer comprising a binder resin and black magnetic acicular composite particles having an average particle diameter of 0.051 to 0.35 μm, comprising magnetic acicular cobalt-coated iron oxide particles or magnetic acicular metal particles containing iron as a main component, a coating formed on surface of the magnetic acicular particles, comprising at least one organosilicon compound selected from the group consisting of: (1) organosilane compounds obtainable from alkoxysilane compounds, and (2) polysiloxanes or modified polysiloxanes, and a carbon black coat formed on the coating layer comprising said organosilicon compound, in an amount of from more than 10 to 40 parts by weight based on 100 parts by weight of said magnetic acicular particles. Such a magnetic recording medium exhibits not only a smooth surface, a smaller light transmittance and a lower surface electrical resistivity value, but also a small friction coefficient and an excellent running durability.

摘要翻译： 磁记录介质包括：非磁性基膜; 以及包含粘结剂树脂和平均粒径为0.051-0.35μm的黑色磁性针状复合颗粒的磁性记录层，包括磁性针状钴包覆氧化铁颗粒或以铁为主要成分的磁性针状金属颗粒，在表面上形成的涂层 包含至少一种选自以下的有机硅化合物：（1）由烷氧基硅烷化合物得到的有机硅烷化合物和（2）聚硅氧烷或改性聚硅氧烷，以及在包含所述有机硅的涂层上形成的炭黑涂层 化合物，相对于100重量份的所述磁针状颗粒，其含量为10-40重量份以上。这样的磁记录介质不仅表现出光滑的表面，较小的透光率和较低的表面电阻率值 ，而且摩擦系数小，运行耐久性好。

公开(公告)号：US06569530B2

公开(公告)日：2003-05-27

申请号：US10061357

申请日：2002-02-04

申请人： Kazuyuki Hayashi ,  Keisuke Iwasaki ,  Mamoru Kamigaki ,  Hiroko Morii

发明人： Kazuyuki Hayashi ,  Keisuke Iwasaki ,  Mamoru Kamigaki ,  Hiroko Morii

IPC分类号： G11B5706

CPC分类号： G11B5/712 ,  Y10T428/256 ,  Y10T428/257 ,  Y10T428/2991 ,  Y10T428/2993 ,  Y10T428/2995 ,  Y10T428/2998

摘要： A magnetic recording medium comprises: a non-magnetic base film; and a magnetic recording layer comprising a binder resin and magnetic composite particles having an average particle diameter of 0.02 to 0.70 &mgr;m, comprising magnetic particles as core particles, a coating formed on surface of said magnetic particle, comprising at least one organosilicon compound selected from the group consisting of: (1) organosilane compounds obtainable from alkoxysilane compounds, and (2) polysiloxanes or modified polysiloxanes, and a phthalocyanine-based pigments coat formed on said coating layer comprising said organosilicon compound, in an amount of 1 to 100 parts by weight based on 100 parts by weight of said magnetic particles.

摘要翻译： 磁记录介质包括：非磁性基膜; 以及包含粘合剂树脂的磁记录层和平均粒径为0.02-0.70μm的磁性复合颗粒，其包含作为核心颗粒的磁性颗粒，在所述磁性颗粒的表面上形成的涂层，包含至少一种选自以下的有机硅化合物： ：（1）由烷氧基硅烷化合物得到的有机硅烷化合物和（2）聚硅氧烷或改性聚硅氧烷，以及包含所述有机硅化合物的所述涂层上形成的酞菁类颜料涂层，其量为100至100重量份，基于100 所述磁性颗粒重量份。

公开(公告)号：US06432377B1

公开(公告)日：2002-08-13

申请号：US09933074

申请日：2001-08-21

申请人： Kazuyuki Hayashi ,  Keisuke Iwasaki ,  Hiroko Morii

发明人： Kazuyuki Hayashi ,  Keisuke Iwasaki ,  Hiroko Morii

IPC分类号： C01G4902

CPC分类号： B82Y30/00 ,  C01G49/06 ,  C01P2004/03 ,  C01P2004/10 ,  C01P2004/20 ,  C01P2004/51 ,  C01P2004/54 ,  C01P2004/62 ,  C01P2004/64 ,  C01P2004/82 ,  C01P2006/10 ,  C01P2006/12 ,  C01P2006/42 ,  C01P2006/80 ,  C09C1/24 ,  G11B5/733 ,  G11B5/738 ,  Y10S428/90 ,  Y10T428/25 ,  Y10T428/2982

摘要： The present invention provides particles for a non-magnetic undercoat layer of a magnetic recording medium, which comprises acicular hematite particles having an average major axial diameter of not more than 0.3 &mgr;m, a geometrical standard deviation in the major axial diameter of not more than 1.50 and a BET specific surface area of not less than 40 m2/g, and containing a total amount of sodium of not more than 50 ppm calculated as Na. The acicular hematite particles have an excellent dispersibility in a vehicle so that a non-magnetic undercoat layer containing the particles is excellent in surface smoothness and strength. A magnetic recording medium using the non-magnetic undercoat layer is excellent not only in electromagnetic performance, but in storage stability.

公开(公告)号：US06299973B1

公开(公告)日：2001-10-09

申请号：US09420008

申请日：1999-10-18

申请人： Kazuyuki Hayashi ,  Keisuke Iwasaki ,  Hiroko Morii

发明人： Kazuyuki Hayashi ,  Keisuke Iwasaki ,  Hiroko Morii

IPC分类号： G11B5738

CPC分类号： B82Y30/00 ,  C01G49/06 ,  C01P2004/03 ,  C01P2004/10 ,  C01P2004/20 ,  C01P2004/51 ,  C01P2004/54 ,  C01P2004/62 ,  C01P2004/64 ,  C01P2004/82 ,  C01P2006/10 ,  C01P2006/12 ,  C01P2006/42 ,  C01P2006/80 ,  C09C1/24 ,  G11B5/733 ,  G11B5/738 ,  Y10S428/90 ,  Y10T428/25 ,  Y10T428/2982

摘要： The present invention provides particles for a non-magnetic undercoat layer of a magnetic recording medium, which comprises particular hematite particles having an average major axial diameter of not more than 0.3 &mgr;m, a geometrical standard deviation in the major axial diameter of not more than 1.50 and a BET specific surface area of not less than 40 m2/g, and containing a total amount of sodium of not more than 50 ppm calculated as Na. The particular hematite particles have an excellent dispersibility in a vehicle so that a non-magnetic undercoat layer containing the particles is excellent in surface smoothness and strength. A magnetic recording medium using the non-magnetic undercoat layer is excellent not only in electromagnetic performance, but in storage stability.

摘要翻译： 本发明提供一种磁记录介质的非磁性底涂层用颗粒，其包含平均主轴向直径不大于0.3μm的特定赤铁矿颗粒，主轴向直径的几何标准偏差不大于1.50 BET比表面积不小于40m2 / g，并且含有以Na计算的不超过50ppm的钠的总量。 特定的赤铁矿颗粒在车辆中具有优异的分散性，使得含有该颗粒的非磁性底涂层的表面平滑度和强度是优异的。 使用非磁性底涂层的磁记录介质不仅在电磁性能方面优异，而且在储存稳定性方面是优异的。

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。

公开(公告)号：US06767611B2

公开(公告)日：2004-07-27

申请号：US10152345

申请日：2002-05-22

申请人： Kazuyuki Hayashi ,  Hiroko Morii ,  Mamoru Kamigaki ,  Yasuyuki Tanaka ,  Keisuke Iwasaki

发明人： Kazuyuki Hayashi ,  Hiroko Morii ,  Mamoru Kamigaki ,  Yasuyuki Tanaka ,  Keisuke Iwasaki

IPC分类号： G11B5706

CPC分类号： G11B5/712 ,  Y10T428/256 ,  Y10T428/257 ,  Y10T428/2991 ,  Y10T428/2993 ,  Y10T428/2995 ,  Y10T428/2996 ,  Y10T428/31663

摘要： A magnetic recording medium using black magnetic acicular composite particles produced by forming a single carbon black coat between the surface of magnetic acicular cobalt-coated iron oxide particle or magnetic acicular metal particle and a coating comprising at least one organosilicon compound, in an amount of from more than 10 to 40 parts by weight based on 100 parts by weight of the magnetic acicular particles, exhibits not only a smooth surface, a smaller light transmittance and a lower surface electrical resistivity value, but also a small friction coefficient and an excellent running durability.

公开(公告)号：US06666914B2

公开(公告)日：2003-12-23

申请号：US10162689

申请日：2002-06-06

申请人： Kazuyuki Hayashi ,  Hiroko Morii ,  Keisuke Iwasaki

发明人： Kazuyuki Hayashi ,  Hiroko Morii ,  Keisuke Iwasaki

IPC分类号： C08K500

CPC分类号： C09D11/324 ,  C01P2004/04 ,  C01P2006/10 ,  C01P2006/12 ,  C01P2006/62 ,  C01P2006/63 ,  C01P2006/64 ,  C09C1/027 ,  C09C1/24 ,  C09C1/3054 ,  C09C1/3081 ,  C09C1/309 ,  C09C1/407 ,  Y10T428/2991

摘要： A black colorant for ink-jet printing ink, has an average particle diameter of 0.001 to 0.15 &mgr;m, and comprises: extender pigments as core particles; a gluing agent-coating layer formed on at least a part or the surface of said core particles; and a black pigment coat uniformly formed on at least a part of said gluing agent-coating layer. The black colorant for ink-jet printing ink exhibits not only a high blackness and an excellent tinting strength, but also excellent dispersibility and light resistance in spite of fine particles.

摘要翻译： 用于喷墨印刷油墨的黑色着色剂具有0.001至0.15μm的平均粒径，并且包括：作为芯颗粒的增量颜料;在所述芯颗粒的至少一部分或表面上形成的胶粘剂涂层; 和在所述胶粘剂涂层的至少一部分上均匀形成的黑色颜料涂层。喷墨印刷油墨的黑色着色剂不仅具有高的黑度和优异的着色强度，而且还表现出优异的分散性和耐光性 细颗粒。

公开(公告)号：US06623557B2

公开(公告)日：2003-09-23

申请号：US10160297

申请日：2002-06-04

申请人： Kazuyuki Hayashi ,  Hiroko Morii ,  Keisuke Iwasaki

发明人： Kazuyuki Hayashi ,  Hiroko Morii ,  Keisuke Iwasaki

IPC分类号： C08K500

CPC分类号： B82Y30/00 ,  C01P2004/01 ,  C01P2004/03 ,  C01P2004/10 ,  C01P2004/20 ,  C01P2004/30 ,  C01P2004/32 ,  C01P2004/50 ,  C01P2004/51 ,  C01P2004/61 ,  C01P2004/62 ,  C01P2004/64 ,  C01P2004/82 ,  C01P2004/84 ,  C01P2006/12 ,  C01P2006/60 ,  C01P2006/62 ,  C01P2006/63 ,  C01P2006/64 ,  C01P2006/65 ,  C01P2006/66 ,  C01P2006/80 ,  C09C1/027 ,  C09C1/309 ,  C09C1/3692 ,  C09C1/407 ,  C09C3/006 ,  C09C3/12 ,  C09D11/32 ,  Y10T428/2991

摘要： A colorant for ink-jet printing ink of the present invention, has an average particle diameter of 0.001 to 0.15 &mgr;m, and comprises: extender pigments as core particles; a gluing agent coating layer formed on at least a part of surface of said core particle; and an organic pigment coat uniformly formed on at least a part of said gluing agent coating layer. The colorant for ink-jet printing ink exhibits not only a high tinting strength and a clear hue, but also excellent dispersibility and light resistance in spite of fine particles.

摘要翻译： 本发明的喷墨印刷用油墨的着色剂的平均粒径为0.001〜0.15μm，包括：作为核心粒子的增量颜料; 形成在所述芯粒子表面的至少一部分上的胶粘剂涂层; 和均匀地形成在所述胶粘剂涂层的至少一部分上的有机颜料涂层。 用于喷墨印刷油墨的着色剂不仅具有高的着色强度和清晰的色调，而且还表现出优异的分散性和耐光性，尽管细颗粒。