公开(公告)号：US06432508B1

公开(公告)日：2002-08-13

申请号：US09758342

申请日：2001-01-12

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

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

IPC分类号： G11B5738

摘要： High-density acicular hematite particles comprise acicular hematite particles and a coat comprising an oxide of tin or oxides of tin and antimony, formed on at least a part of surfaces of said acicular hematite particles; and have an average major axial diameter of not more than 0.3 &mgr;m, a pH value of not less than 8, a soluble sodium salt content of not more than 300 ppm, calculated as Na, and a soluble sulfate content of not more than 150 ppm, calculated as SO4. Such high-density acicular hematite particles is suitable as non-magnetic particles for a non-magnetic undercoat layer of a magnetic recording medium using magnetic particles containing iron as a main ingredient, have an excellent dispersibility in vehicle and a low volume resistivity.

公开(公告)号：US06420030B1

公开(公告)日：2002-07-16

申请号：US09521676

申请日：2000-03-08

申请人： Kazuyuki Hayashi ,  Yasuyuki Tanaka ,  Hiroko Morii

发明人： Kazuyuki Hayashi ,  Yasuyuki Tanaka ,  Hiroko Morii

IPC分类号： B32B516

CPC分类号： B82Y30/00 ,  C01P2004/03 ,  C01P2004/04 ,  C01P2004/10 ,  C01P2004/20 ,  C01P2004/30 ,  C01P2004/32 ,  C01P2004/41 ,  C01P2004/50 ,  C01P2004/51 ,  C01P2004/54 ,  C01P2004/61 ,  C01P2004/62 ,  C01P2004/64 ,  C01P2004/80 ,  C01P2004/82 ,  C01P2004/86 ,  C01P2006/12 ,  C01P2006/60 ,  C01P2006/62 ,  C01P2006/80 ,  C08K3/22 ,  C08K9/06 ,  C08K9/08 ,  C09C1/0081 ,  C09C1/24 ,  C09C3/12 ,  C09D7/62 ,  C09D7/67 ,  C09D7/68 ,  Y10T428/2998

摘要： Black iron-based composite particles of the present invention comprise: as a core particle black iron oxide particle or black iron oxide hydroxide particle having an average particle size of 0.08 to 1.0 &mgr;m; a coating layer formed on the surface of the black iron oxide particle or black iron oxide hydroxide particle, comprising at least one organosilicon compound selected from the group consisting of: (1) organosilane compounds obtained from alkoxysilane compounds, (2) polysiloxanes, or modified polysiloxanes and (3) fluoroalkyl organosilane compounds obtained from fluoroalkylsilane compounds; and carbon black coat formed on said coating comprising said organosilicon compound, in an amount of 1 to 30 parts by weight based on 100 parts by weight of said black iron oxide particles or black iron oxide hydroxide particles. Such black iron-based composite particles have an excellent dispersibility in a vehicle, or a rubber or resin composition on the basis of a small amount of the carbon black which are desorbed from the surface of the black iron-based composite particles, and a high blackness substantially identical to a blackness of carbon black fine particles used solely, even when carbon black is contained therein only in a small amount.

摘要翻译： 本发明的黑色铁系复合粒子包含平均粒径为0.08〜1.0μm的芯粒黑色氧化铁粒子或黑色铁氧化物氢氧化物粒子，形成在黑色氧化铁粒子的表面上的被覆层 或黑铁氧化物氢氧化物颗粒，其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获得的有机硅烷化合物，（2）聚硅氧烷或改性聚硅氧烷，和（3）由氟烷基硅烷化合物得到的氟代烷基有机硅烷化合物; 并且在所述包含所述有机硅化合物的涂层上形成的炭黑涂层，其量为基于100重量份的所述黑色氧化铁颗粒或黑色铁氧化物氢氧化物颗粒为1至30重量份。 这种黑色铁基复合颗粒在车辆中具有优异的分散性，或者基于从黑色铁基复合颗粒的表面解吸的少量炭黑，橡胶或树脂组合物，以及高 黑色度与单独使用的炭黑细颗粒的黑度基本相同，即使仅含有少量的炭黑也是如此。

公开(公告)号：US06352776B1

公开(公告)日：2002-03-05

申请号：US09632096

申请日：2000-08-02

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

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

IPC分类号： G11B5733

CPC分类号： B82Y30/00 ,  C01P2004/03 ,  C01P2004/04 ,  C01P2004/10 ,  C01P2004/20 ,  C01P2004/32 ,  C01P2004/38 ,  C01P2004/50 ,  C01P2004/51 ,  C01P2004/54 ,  C01P2004/62 ,  C01P2004/64 ,  C01P2004/80 ,  C01P2004/82 ,  C01P2004/84 ,  C01P2004/86 ,  C01P2006/12 ,  C01P2006/19 ,  C01P2006/22 ,  C01P2006/40 ,  C01P2006/42 ,  C01P2006/60 ,  C01P2006/62 ,  C01P2006/80 ,  C01P2006/90 ,  C09C1/24 ,  C09C3/006 ,  C09C3/12 ,  G11B5/738 ,  Y10S428/90 ,  Y10T428/2991 ,  Y10T428/2993 ,  Y10T428/2995 ,  Y10T428/2998

摘要： A magnetic recording medium of the present invention comprises: a non-magnetic base film; a non-magnetic undercoat layer formed on the non-magnetic base film, comprising a binder resin and non-magnetic acicular black iron-based composite particles; and a magnetic coating film comprising a binder resin and magnetic particles, the non-magnetic acicular black iron-based composite particles comprising: acicular hematite particles or acicular iron oxide hydroxide particles (core particles) having an average major axis diameter of 0.01 to 0.3 &mgr;m; a coating layer formed on the surface of the particles, comprising a specific organosilicon compound; and a carbon black coat composed of at least two carbon black layers integrally formed on the coating layer, adhered with each other through an adhesive on the coating layer.

摘要翻译： 本发明的磁记录介质包括：非磁性基膜;在非磁性基膜上形成的非磁性底涂层，包含粘合剂树脂和非磁性针状黑铁基复合颗粒; 和包含粘合剂树脂和磁性颗粒的磁性涂膜，所述非磁性针状黑色铁基复合颗粒包括：平均长径为0.01至0.3μm的针状赤铁矿颗粒或针状铁氧化物氢氧化物颗粒（核心颗粒）; 形成在颗粒表面上的涂层，其包含特定的有机硅化合物; 以及由涂覆层一体形成的至少两个碳黑层构成的炭黑涂层，通过涂层上的粘合剂彼此粘合。

公开(公告)号：US06251555B1

公开(公告)日：2001-06-26

申请号：US09291198

申请日：1999-04-14

申请人： Kazuyuki Hayashi ,  Seiji Ishitani ,  Yasuyuki Tanaka ,  Hiroko Morii

发明人： Kazuyuki Hayashi ,  Seiji Ishitani ,  Yasuyuki Tanaka ,  Hiroko Morii

IPC分类号： G90

CPC分类号： G03G9/0839 ,  G03G9/0833 ,  Y10T428/2991 ,  Y10T428/2995

摘要： Black magnetic composite particles for black magnetic toner according to the present invention comprise: magnetite particle as core particle; fine particles which are adhered or exist on at least a part of the surface of each magnetite particle, and comprise oxides, oxide hydroxides or oxides and oxide hydroxides composed of at least one element selected from the group consisting of Si, Zr, Ti, Al and Ce; and a methyl hydrogen polysiloxane coating layer formed on said fine particles or said fine particles and the exposed surface of the magnetite particle, the average particle size of said black magnetic composite particles being 0.08 to 1.0 &mgr;m. Such black magnetic composite particles are suitable for a black magnetic toner which can exhibit not only an excellent flowability but also a high volume resistivity.

摘要翻译： 根据本发明的用于黑色磁性调色剂的黑色磁性复合颗粒包括：作为核心颗粒的磁铁矿颗粒;附着或存在于每个磁铁矿颗粒表面的至少一部分上的细颗粒，并且包含氧化物，氧化物氢氧化物或氧化物，以及 由选自Si，Zr，Ti，Al和Ce中的至少一种元素组成的氧化物氢氧化物; 和在所述细颗粒或所述细颗粒和磁铁矿颗粒的暴露表面上形成的甲基氢聚硅氧烷涂层，所述黑色磁性复合颗粒的平均粒度为0.08至1.0μm。这种黑色磁性复合颗粒适合于黑色 不仅具有优异的流动性，而且还具有高体积电阻率的磁性调色剂。

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。

公开(公告)号：US06689452B2

公开(公告)日：2004-02-10

申请号：US10128569

申请日：2002-04-24

申请人： Mamoru Kamigaki ,  Seiji Ishitani ,  Hiroko Morii

发明人： Mamoru Kamigaki ,  Seiji Ishitani ,  Hiroko Morii

IPC分类号： G11B5706

CPC分类号： G11B5/712 ,  G11B5/708 ,  G11B5/738 ,  Y10T428/2995

摘要： A magnetic recording medium including a non-magnetic base film; and a magnetic recording layer formed on the non-magnetic base film. The magnetic recording layer contains a filler, a binder resin and surface-modified magnetic particles having an average particle diameter of 0.01 to 0.7 &mgr;m and contains magnetic particles and a silane monomer coat formed on surface of the magnetic particle by a dry-mixing method.

摘要翻译： 一种包括非磁性基膜的磁记录介质; 以及形成在非磁性基膜上的磁记录层。 磁记录层含有平均粒径为0.01〜0.7μm的填料，粘合剂树脂和表面改性磁性粒子，并含有通过干式混合法形成在磁性颗粒的表面上的磁性粒子和硅烷单体涂层。