公开(公告)号：US06638675B2

公开(公告)日：2003-10-28

申请号：US10141959

申请日：2002-05-10

Applicant: Kazuyuki Hayashi ,  Hiroko Morii ,  Yasuyuki Tanaka ,  Seiji Ishitani

Inventor： Kazuyuki Hayashi ,  Hiroko Morii ,  Yasuyuki Tanaka ,  Seiji Ishitani

IPC: G03G9083

CPC classification number: G03G9/083 ,  G03G9/0833 ,  G03G9/0836 ,  G03G9/0839 ,  G03G9/08773 ,  G03G9/0902 ,  G03G9/0904 ,  Y10S428/90 ,  Y10T428/2991 ,  Y10T428/2995 ,  Y10T428/2998

Abstract: Black magnetic toner comprising: a binder resin, and black magnetic composite particles comprising: magnetic iron oxide particles having an average particle diameter of 0.055 to 0.95 &mgr;m; a coating layer formed on the surface of said magnetic iron oxide particles, comprising at least one organosilicon compound selected from the group consisting of: (1) organosilane compounds obtainable from alkoxysilane compounds, (2) polysiloxanes or modified polysiloxanes, and (3) fluoroalkyl organosilane compounds obtainable from fluoroalkylsilane compounds; and a carbon black coat formed on said coating layer comprising said organosilicon compound, in an amount of 1 to 25 parts by weight based on 100 parts by weight of said magnetic iron oxide particles. Such a black magnetic toner can be free from being deteriorated in electric resistance due to the existence of the carbon black coat, and as a result, is suitable as a high-resistance or insulated magnetic toner.

Abstract translation: 黑色磁性调色剂，其包含：粘合剂树脂和黑色磁性复合颗粒，其包含平均粒径为0.055至0.95μm的磁性氧化铁颗粒;形成在所述磁性氧化铁颗粒的表面上的涂层，其包含至少一种有机硅化合物 选自：（1）可从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）可从氟代烷基硅烷化合物获得的氟烷基有机硅烷化合物; 和在包含所述有机硅化合物的所述涂层上形成的炭黑涂层，其量为基于100重量份的所述磁性氧化铁颗粒为1至25重量份。这样的黑色磁性调色剂可以没有劣化的电 由于存在炭黑涂层而导致的电阻，因此适合作为高电阻或绝缘磁性调色剂。

公开(公告)号：US06531211B1

公开(公告)日：2003-03-11

申请号：US09577939

申请日：2000-05-25

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

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

IPC: G11B5706

CPC classification number: G11B5/712 ,  Y10T428/25 ,  Y10T428/2982 ,  Y10T428/2991 ,  Y10T428/2993 ,  Y10T428/2995 ,  Y10T428/2998

Abstract: Black plate-shaped ferrite composite particles with magnetoplumbite structure, particle size of 0.01 to 0.2 &mgr;m are surface coated with an organosilicon compound(s) and a carbon black coating is applied over the organosilicon coating layer. Optionally, a coating of silicon or aluminum oxide or hydroxide is provided on the surface of the black plate-shaped composite particles and below the organosilicon layer. The particles have a high blackness and when applied to a non-magnetic substrate with a binder resin to form a magnetic medium provide low light transmittance, low surface resistivity and a smooth surface.

Abstract translation: 具有磁铅矿结构的黑色板状铁素体复合颗粒，粒径为0.01至0.2μm的表面涂覆有机硅化合物，并在有机硅涂层上施加炭黑涂层。 任选地，在黑色板状复合颗粒的表面上和有机硅层下面提供硅或氧化铝或氢氧化物的涂层。 颗粒具有高的黑度，并且当用粘合剂树脂施加到非磁性基材以形成磁性介质时，提供低的透光率，低的表面电阻率和光滑的表面。

公开(公告)号：US06511733B2

公开(公告)日：2003-01-28

申请号：US09805374

申请日：2001-03-14

Applicant: Kazuyuki Hayashi ,  Mamoru Kamigaki ,  Hiroko Morii

Inventor： Kazuyuki Hayashi ,  Mamoru Kamigaki ,  Hiroko Morii

IPC: B32B516

CPC classification number: G11B5/735 ,  Y10T428/24421 ,  Y10T428/254 ,  Y10T428/257 ,  Y10T428/265 ,  Y10T428/2991 ,  Y10T428/2995 ,  Y10T428/2998

Abstract: A magnetic recording medium comprises: a non-magnetic base film; a magnetic recording layer formed on one surface of the non-magnetic base film, comprising a binder resin and magnetic particles; and a back coat layer formed on a surface opposite of the non-magnetic base film to the surface on which the magnetic recording layer is formed, comprising a binder resin and plate-shaped non-magnetic composite particles having an average plate surface diameter of 0.1 to 5.0 &mgr;m, an average thickness of 0.001 to 0.1 &mgr;m and a plate ratio (average plate surface diameter/average thickness) of 5:1 to 100:1, wherein the plate-shaped non-magnetic composite particles comprise: plate-shaped hematite particles as core particles; a coating layer formed on surface of said plate-shaped hematite particle, comprising at least one organosilicon compound selected from the group consisting of: (1) organosilane compounds obtained from an alkoxysilane compounds, and (2) polysiloxanes or modified polysiloxanes; and a carbon black coat formed on said coating layer comprising at least one organosilicon compound, in an amount of from more than 1 to 30 parts by weight based on 100 parts by weight of said plate-shaped hematite particles.

Abstract translation: 磁记录介质包括：非磁性基膜;在非磁性基膜的一个表面上形成的磁记录层，包括粘合剂树脂和磁性颗粒; 和在与非磁性基膜相对的表面上形成的背涂层与形成有磁记录层的表面形成，包括粘合剂树脂和板状非磁性复合材料颗粒，其平均板表面直径为0.1至 5.0μm，平均厚度为0.001〜0.1μm，板比（平均板面直径/平均厚度）为5:1〜100:1，其中板状非磁性复合颗粒包括：板状赤铁矿颗粒 作为核心颗粒; 所述板状赤铁矿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; 和基于100重量份的所述板状赤铁矿颗粒，在包含至少一种有机硅化合物的所述涂层上形成的炭黑涂层的量为大于1至30重量份。

公开(公告)号：US06475687B2

公开(公告)日：2002-11-05

申请号：US09887512

申请日：2001-06-25

Applicant: Kazuyuki Hayashi ,  Yusuke Shimohata ,  Keisuke Iwasaki ,  Hiroko Morii

Inventor： Kazuyuki Hayashi ,  Yusuke Shimohata ,  Keisuke Iwasaki ,  Hiroko Morii

IPC: G03G900

CPC classification number: G03G9/0835 ,  G03G9/0838 ,  G03G9/0839 ,  Y10T428/2995 ,  Y10T428/2998

Abstract: Magnetic composite particles having an average particle diameter of 0.06 to 1.0 &mgr;m and a coercive force value of less than 39.790 kA/m, comprising: magnetic core particles, a coating formed on surface of said magnetic core 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 an organic blue-based pigment coat formed on said coating layer comprising said organosilicon compound, in an amount of from 1 to 50 parts by weight based on 100 parts by weight of said magnetic core particles. The magnetic composite particles are suitable for black magnetic toner not only exhibiting a deep black color but also having excellent light resistance and fluidity.

Abstract translation: 平均粒径为0.06〜1.0μm，矫顽力值小于39.790kA / m的磁性复合颗粒包括：磁性核颗粒，形成在所述磁芯颗粒的表面上的涂层，其包含至少一种选自下列的有机硅化合物 由（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所述包含所述有机硅化合物的涂层上形成的有机蓝基颜料涂层，其量为1〜 50重量份，基于100重量份的所述磁芯颗粒。磁性复合颗粒适用于黑色磁性调色剂，不仅表现出深黑色，而且具有优异的耐光性和流动性。

公开(公告)号：US06458452B1

公开(公告)日：2002-10-01

申请号：US09465936

申请日：1999-12-17

Applicant: Kazuyuki Hayashi ,  Keisuke Iwasaki ,  Yasuyuki Tanaka ,  Hiroko Morii

Inventor： Kazuyuki Hayashi ,  Keisuke Iwasaki ,  Yasuyuki Tanaka ,  Hiroko Morii

IPC: G11B5733

CPC classification number: G11B5/738 ,  C01G23/047 ,  C01P2004/62 ,  C01P2006/12 ,  C01P2006/80 ,  C09C1/3661 ,  Y10S428/90 ,  Y10T428/25 ,  Y10T428/256 ,  Y10T428/257 ,  Y10T428/265 ,  Y10T428/2982 ,  Y10T428/2991

Abstract: The present invention relates to titanium oxide particles having an average particle size of not more than 0.3 &mgr;m, and a BET specific surface area of 15 to 200 m2/g, containing a soluble sodium salt of not more than 230 ppm, calculated as Na, and a soluble sulfate of not more than 150 ppm, calculated as SO4, and having a pH value of not less than 8. The titanium oxide particles of the present invention are suitable as non-magnetic particles for a non-magnetic undercoat layer of a magnetic recording medium which uses magnetic particles containing iron as a main ingredient, and even more particularly, are suitable as non-magnetic particles for a non-magnetic undercoat layer of a magnetic recording medium which uses magnetic particles containing iron as a main ingredient, show an excellent dispersibility in a binder resin, contain only a small amount of soluble sodium salt and soluble sulfate, and have a pH value of not less than 8.

Abstract translation: 本发明涉及平均粒径不大于0.3μm，BET比表面积为15-200m2 / g的氧化钛颗粒，其含有以Na计算的不大于230ppm的可溶性钠盐， 和不超过150ppm的可溶性硫酸盐，以SO 4计算，pH值不小于8.本发明的氧化钛颗粒适合作为非磁性颗粒用于非磁性底涂层 使用以铁为主成分的磁性粒子的磁记录介质，更具体地说，适合作为使用以铁为主要成分的磁性粒子的磁记录介质的非磁性底涂层的非磁性粒子， 在粘合剂树脂中具有优异的分散性，仅含有少量的可溶性钠盐和可溶性硫酸盐，并且具有不小于8的pH值。

公开(公告)号：US06416864B1

公开(公告)日：2002-07-09

申请号：US09541725

申请日：2000-04-03

Applicant: Kazuyuki Hayashi ,  Hiroko Morii ,  Yasuyuki Tanaka ,  Seiji Ishitani

Inventor： Kazuyuki Hayashi ,  Hiroko Morii ,  Yasuyuki Tanaka ,  Seiji Ishitani

IPC: B32B516

CPC classification number: G03G9/083 ,  G03G9/0833 ,  G03G9/0836 ,  G03G9/0839 ,  G03G9/08773 ,  G03G9/0902 ,  G03G9/0904 ,  Y10S428/90 ,  Y10T428/2991 ,  Y10T428/2995 ,  Y10T428/2998

Abstract: Black magnetic toner comprising: a binder resin, and black magnetic composite particles comprising: magnetic iron oxide particles having an average particle diameter of 0.055 to 0.95 &mgr;m; a coating layer formed on the surface of said magnetic iron oxide particles, comprising at least one organosilicon compound selected from the group consisting of: (1) organosilane compounds obtainable from alkoxysilane compounds, (2) polysiloxanes or modified polysiloxanes, and (3) fluoroalkyl organosilane compounds obtainable from fluoroalkylsilane compounds; and a carbon black coat formed on said coating layer comprising said organosilicon compound, in an amount of 1 to 25 parts by weight based on 100 parts by weight of said magnetic iron oxide particles. Such a black magnetic toner can be free from being deteriorated in electric resistance due to the existence of the carbon black coat, and as a result, is suitable as a high-resistance or insulated magnetic toner.

Abstract translation: 黑色磁性调色剂，其包含：粘合剂树脂和黑色磁性复合颗粒，其包含平均粒径为0.055至0.95μm的磁性氧化铁颗粒;形成在所述磁性氧化铁颗粒的表面上的涂层，其包含至少一种有机硅化合物 选自：（1）可从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）可从氟代烷基硅烷化合物获得的氟烷基有机硅烷化合物; 和在包含所述有机硅化合物的所述涂层上形成的炭黑涂层，其量为基于100重量份的所述磁性氧化铁颗粒为1至25重量份。这样的黑色磁性调色剂可以没有劣化的电 由于存在炭黑涂层而导致的电阻，因此适合作为高电阻或绝缘磁性调色剂。

公开(公告)号：US06294242B1

公开(公告)日：2001-09-25

申请号：US09557631

申请日：2000-04-21

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

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

IPC: G11B5706

CPC classification number: B82Y30/00 ,  C01P2004/03 ,  C01P2004/10 ,  C01P2004/50 ,  C01P2004/54 ,  C01P2004/62 ,  C01P2004/64 ,  C01P2004/80 ,  C01P2004/82 ,  C01P2004/84 ,  C01P2006/12 ,  C01P2006/40 ,  C01P2006/42 ,  C01P2006/60 ,  C01P2006/62 ,  C01P2006/80 ,  C09C3/006 ,  C09C3/12 ,  G11B5/712 ,  Y10S428/90 ,  Y10T428/256 ,  Y10T428/257 ,  Y10T428/2991 ,  Y10T428/2993 ,  Y10T428/2995 ,  Y10T428/31663

Abstract: A magnetic recording medium of the present invention 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 0.72 &mgr;m, comprising: magnetic acicular core particles; a coating formed on surface of said magnetic acicular core particles, comprising at least one organosilicon compound selected from the group consisting of: (1) organosilane compounds obtainable from alkoxysilane compounds, (2) polysiloxanes or modified polysiloxanes, and (3) fluoroalkyl organosilane compounds obtainable from fluoroalkylsilane compounds; and a carbon black coat formed on said coating layer comprising said organosilicon compound, in an amount of 0.5 to 10 parts by weight based on 100 parts by weight of said magnetic acicular particles. Such a magnetic recording medium capable of not only showing a low light transmittance and a low surface resistivity even when the amount of carbon black fine particles added to a magnetic recording layer thereof is as small as possible, but also having a smooth surface.

Abstract translation: 本发明的磁记录介质包括：非磁性基膜; 以及包含粘结剂树脂和平均粒径为0.051〜0.72μm的黑色磁性针状复合粒子的磁记录层，其特征在于，包括：针状核心粒子; 包含至少一种有机硅化合物，所述有机硅化合物选自：（1）由烷氧基硅烷化合物得到的有机硅烷化合物，（2）聚硅氧烷或改性聚硅氧烷，和（3）氟代烷基有机硅烷化合物 可从氟代烷基硅烷化合物获得; 以及基于100重量份的所述磁性针状颗粒，在包含所述有机硅化合物的所述涂层上形成的炭黑涂层，其量为0.5至10重量份。这样的磁记录介质不仅可以显示低光 即使当添加到其磁记录层中的炭黑细颗粒的量尽可能小时，也具有平滑的表面时，透光率和低的表面电阻率。

公开(公告)号：US06248437B1

公开(公告)日：2001-06-19

申请号：US09577334

申请日：2000-05-23

Applicant: Kazuyuki Hayashi ,  Keisuke Iwasaki ,  Hiroko Morii ,  Yasuyuki Tanaka

Inventor： Kazuyuki Hayashi ,  Keisuke Iwasaki ,  Hiroko Morii ,  Yasuyuki Tanaka

IPC: B32B516

CPC classification number: B82Y30/00 ,  C01G49/06 ,  C01P2002/52 ,  C01P2004/10 ,  C01P2004/54 ,  C01P2004/62 ,  C01P2004/64 ,  C01P2006/12 ,  C01P2006/22 ,  C01P2006/42 ,  G11B5/738 ,  Y10S428/90 ,  Y10T428/256 ,  Y10T428/257 ,  Y10T428/2982 ,  Y10T428/2991

Abstract: The present invention relates to acicular hematite particles containing aluminum of 0.05 to 50% by weight, calculated as Al, having an average major axial diameter of not more than 0.3 &mgr;m and a pH value of the particles of not less than 8, and containing soluble sodium salts of not more than 300 ppm soluble sodium, calculated as Na, and soluble sulfates of not more than 150 ppm soluble sulfate, calculated as SO4, which have an excellent dispersibility in a binder resin, and a magnetic recording medium which uses the hematite particles as non-magnetic particles for a non-magnetic undercoat layer, which has small light transmittance, smooth surface, high strength and high durability, and which is capable of suppressing the deterioration in the magnetic properties caused by a corrosion of the magnetic particles containing as a main ingredient in the magnetic recording layer.

Abstract translation: 本发明涉及铝的0.05〜50重量％的针状赤铁矿颗粒，Al计算，平均主轴径不大于0.3μm，颗粒的pH值不小于8，并含有可溶性 以Na计算的不超过300ppm的可溶性钠的钠盐和在粘合剂树脂中具有优异分散性的以SO 4计算的不超过150ppm可溶性硫酸盐的可溶性硫酸盐和使用赤铁矿的磁记录介质 颗粒作为非磁性底涂层的非磁性颗粒，其具有小的透光率，光滑的表面，高强度和高耐久性，并且能够抑制由含有 作为磁记录层中的主要成分。

公开(公告)号：US06207279B1

公开(公告)日：2001-03-27

申请号：US09048179

申请日：1998-03-26

Applicant: Kazuyuki Hayashi ,  Keisuke Iwasaki ,  Yasuyuki Tanaka ,  Hiroko Morii

Inventor： Kazuyuki Hayashi ,  Keisuke Iwasaki ,  Yasuyuki Tanaka ,  Hiroko Morii

IPC: B32B1502

CPC classification number: B82Y30/00 ,  C01G49/06 ,  C01P2004/10 ,  C01P2004/54 ,  C01P2004/62 ,  C01P2004/64 ,  C01P2004/84 ,  C01P2006/12 ,  C01P2006/22 ,  C01P2006/40 ,  C01P2006/42 ,  C01P2006/80 ,  G11B5/708 ,  G11B5/738 ,  Y10T428/24355 ,  Y10T428/257 ,  Y10T428/265 ,  Y10T428/2991

Abstract: 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.

Abstract translation: 高密度针状赤铁矿颗粒包括针状赤铁矿颗粒和在所述针状赤铁矿颗粒的至少一部分表面上形成的包含锡或锡和氧化物的氧化物的涂层; 平均主轴径不大于0.3μm，pH值不小于8，可溶性钠盐含量不超过300ppm，以Na计算，可溶性硫酸盐含量不大于150ppm， 以SO4计算。 这种高密度针状赤铁矿颗粒适用于使用以铁为主要成分的磁性颗粒的磁记录介质的非磁性底涂层的非磁性颗粒，在车辆中具有优异的分散性和低体积电阻率。

公开(公告)号：US06207253B1

公开(公告)日：2001-03-27

申请号：US09220356

申请日：1998-12-24

Applicant: Kazuyuki Hayashi ,  Yasuyuki Tanaka ,  Keisuke Iwasaki ,  Hiroko Morii

Inventor： Kazuyuki Hayashi ,  Yasuyuki Tanaka ,  Keisuke Iwasaki ,  Hiroko Morii

IPC: B32B516

CPC classification number: B82Y30/00 ,  C01G49/06 ,  C01P2004/04 ,  C01P2004/10 ,  C01P2004/39 ,  C01P2004/50 ,  C01P2004/51 ,  C01P2004/54 ,  C01P2004/61 ,  C01P2004/62 ,  C01P2004/64 ,  C01P2004/86 ,  C01P2006/12 ,  C01P2006/22 ,  C01P2006/42 ,  C01P2006/80 ,  C09C1/24 ,  G11B5/733 ,  G11B5/738 ,  Y10T428/256 ,  Y10T428/257 ,  Y10T428/259 ,  Y10T428/2991 ,  Y10T428/2993

Abstract: Acicular hematite particles of the present invention comprise an average major axis diameter of 0.004 to 0.295 &mgr;m, a geometrical standard deviation of minor axis diameter of not more than 1.35 and a pH value of not less than 8, and containing not more than 300 ppm of soluble sodium salt, calculated as Na and not more than 150 ppm of soluble sulfate, calculated as SO4. Such acicular hematite particles are suitable as non-magnetic particles for a non-magnetic undercoat layer of a magnetic recording medium which exhibits a low light transmittance, an excellent smooth surface and a high strength, and can be prevented from being deteriorated in magnetic properties due to the corrosion of magnetic acicular metal particles containing iron as a main component which are dispersed in a magnetic recording layer thereof.

Abstract translation: 本发明的针状赤铁矿颗粒包括平均长轴直径为0.004至0.295μm，短轴直径的几何标准偏差不大于1.35，pH值不小于8，并且包含不大于300ppm的 可溶性钠盐，以Na计，不超过150ppm的可溶性硫酸盐，以SO4计算。这种针状赤铁矿颗粒适合作为磁性记录介质的非磁性底涂层的非磁性颗粒，其表现出低的透光率 ，具有优异的光滑表面和高强度，并且可以防止由于分散在其磁记录层中的以铁为主要成分的磁针状金属颗粒的腐蚀而导致的磁特性劣化。