公开(公告)号：US06458452B1

公开(公告)日：2002-10-01

申请号：US09465936

申请日：1999-12-17

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： 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

摘要： 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.

摘要翻译： 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

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

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

IPC分类号： B32B516

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

摘要： 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.

摘要翻译： 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

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： 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

摘要： 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.

摘要翻译： 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：US06263148B1

公开(公告)日：2001-07-17

申请号：US09428651

申请日：1999-10-28

申请人： Taizou Hori ,  Yasuyuki Tanaka

发明人： Taizou Hori ,  Yasuyuki Tanaka

IPC分类号： H04N592

CPC分类号： H04N9/7921 ,  G11B15/087 ,  G11B15/125 ,  G11B15/1875 ,  G11B15/4678 ,  H04N5/78266

摘要： A reproduction apparatus reproduces information signals recorded in a plurality of recording modes having different information sizes of an information signal to be recorded per unit time, discriminates the recording mode of the reproduced information signal, and controls tracking between a recording medium and head in accordance with the discrimination result.

摘要翻译： 再现装置再现以每单位时间记录的信息信号的信息大小不同的多种记录模式记录的信息信号，对再生信息信号的记录方式进行识别，并按照 歧视结果。

公开(公告)号：US06248437B1

公开(公告)日：2001-06-19

申请号：US09577334

申请日：2000-05-23

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

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

IPC分类号： B32B516

CPC分类号： 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

摘要： 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.

摘要翻译： 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

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： B32B1502

CPC分类号： 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

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.

摘要翻译： 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

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

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

IPC分类号： B32B516

CPC分类号： 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

摘要： 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.

摘要翻译： 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。

公开(公告)号：US6130017A

公开(公告)日：2000-10-10

申请号：US293057

申请日：1999-04-16

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： G03G9/087 ,  G03G9/09

CPC分类号： G03G9/08773 ,  G03G9/0902 ,  Y10T428/2991

摘要： Black non-magnetic composite particles for black toner according to the present invention, comprise:black hematite particles or black iron oxide hydroxide particles as core particles;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; anda 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 non-magnetic composite particles being 0.08 to 1.0 .mu.m.Such black non-magnetic composite particles are suitable for a black toner which can exhibit not only an excellent flowability but also a high volume resistivity.

摘要翻译： 本发明黑色调色剂黑色非磁性复合颗粒包括黑色赤铁矿颗粒或黑色铁氧化物氢氧化物颗粒作为核心颗粒; 附着或存在于每个磁铁矿颗粒的表面的至少一部分上的细颗粒，并且包含由选自Si，Zr，Ti，Al中的至少一种元素组成的氧化物，氧化物氢氧化物或氧化物和氧化物氢氧化物 和Ce; 和形成在所述微粒或所述微粒上的甲基氢聚硅氧烷涂层和所述磁铁矿粒子的露出面，所述黑色非磁性复合粒子的平均粒径为0.08〜1.0μm。 这种黑色非磁性复合颗粒适用于黑色调色剂，其不仅具有优异的流动性，而且还具有高的体积电阻率。

公开(公告)号：US6120898A

公开(公告)日：2000-09-19

申请号：US4720

申请日：1998-01-08

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

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

IPC分类号： C01G49/06 ,  G11B5/738 ,  C09C1/24

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

摘要： 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 .mu.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 SO.sub.4, 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.

摘要翻译： 本发明涉及铝的0.05〜50重量％的针状赤铁矿粒子，Al计算，平均主轴径为0.3μm以下，粒子的pH值为8以上，含有 以Na计算的不超过300ppm可溶性钠的可溶性钠盐和以粘结剂树脂具有优异分散性的SO4计算的不超过150ppm可溶性硫酸盐的可溶性硫酸盐，以及使用 赤铁矿颗粒作为非磁性底涂层的非磁性颗粒，其透光率小，表面光滑，强度高，耐久性高，能够抑制由磁性颗粒的腐蚀引起的磁特性的劣化 在磁记录层中含有主要成分。

公开(公告)号：US6042937A

公开(公告)日：2000-03-28

申请号：US990880

申请日：1997-12-15

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： C01G23/00 ,  C01G23/04 ,  C01G23/047 ,  C09C1/36 ,  G11B5/73 ,  G11B5/738 ,  G11B5/68

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

摘要： The present invention relates to titanium oxide particles having an average particle size of not more than 0.3 .mu.m, and a BET specific surface area of 15 to 200 m.sup.2 /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 SO.sub.4, 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.

摘要翻译： 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，其含有不大于230ppm的可溶性钠盐，其计算为Na ，以SO4计算的不大于150ppm的可溶性硫酸盐，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， 在粘合剂树脂中显示出优异的分散性，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。