公开(公告)号：US06723456B2

公开(公告)日：2004-04-20

申请号：US10022818

申请日：2001-12-20

申请人： Kazuyuki Hayashi ,  Keisuke Iwasaki ,  Seiji Ishitani ,  Hiroko Morii

发明人： Kazuyuki Hayashi ,  Keisuke Iwasaki ,  Seiji Ishitani ,  Hiroko Morii

IPC分类号： B32B516

CPC分类号： G11B5/738 ,  G11B5/733 ,  Y10T428/256

摘要： Hematite particles aggregates as non-magnetic particles of the present invention are capable of forming a non-magnetic undercoat layer of a magnetic recording medium having a more excellent surface smoothness, which can exhibit not only an excellent dispersibility but also have an improving ability of a surface smoothness of a coating film produced therefrom by calendering treatment, a non-magnetic undercoat layer for magnetic recording medium which contains the hematite particles aggregates is exhibits a more excellent surface smoothness, and a magnetic recording medium having the non-magnetic undercoat layer, is exhibits a more excellent surface smoothness.

摘要翻译： 作为本发明的非磁性粒子的赤铁矿颗粒聚集体能够形成具有更优异的表面平滑性的磁记录介质的非磁性底涂层，其不仅具有优异的分散性，而且还具有改善的 通过压延处理制成的涂膜的表面光滑度，含有赤铁矿颗粒聚集体的磁记录介质的非磁性底涂层表现出更优异的表面平滑度，并且具有非磁性底涂层的磁记录介质是 表现出更优异的表面平滑度。

公开(公告)号：US06544647B1

公开(公告)日：2003-04-08

申请号：US09625404

申请日：2000-07-25

申请人： Kazuyuki Hayashi ,  Keisuke Iwasaki ,  Hiroko Morii ,  Mineko Ohsugi

发明人： Kazuyuki Hayashi ,  Keisuke Iwasaki ,  Hiroko Morii ,  Mineko Ohsugi

IPC分类号： B32B530

CPC分类号： B82Y30/00 ,  C01P2004/03 ,  C01P2004/10 ,  C01P2004/50 ,  C01P2004/51 ,  C01P2004/54 ,  C01P2004/62 ,  C01P2004/64 ,  C01P2004/86 ,  C01P2006/12 ,  C01P2006/40 ,  C01P2006/42 ,  C01P2006/90 ,  C09C1/22 ,  G11B5/738 ,  Y10T428/2991 ,  Y10T428/2993 ,  Y10T428/2995 ,  Y10T428/2998

摘要： Non-magnetic composite particles composed of non-magnetic core particles having an average particle size of 0.01 to 0.3 &mgr;m, and inorganic fine particles having an average particle size of 0.001 to 0.07 &mgr;m. The fine particles are present in an amount of 0.1 to 20% by weight based on the weight of the non-magnetic particles are on the surface of each non-magnetic particle, and are fixed or anchored on the surface of each non-magnetic particle through a silicon compound.The non-magnetic composite particles have a high polishing effect and a high dispersibility, and are useful as a non-magnetic undercoat layer for a magnetic recording medium.

摘要翻译： 由平均粒径为0.01〜0.3μm的非磁性核粒子和平均粒径为0.001〜0.07μm的无机细颗粒构成的非磁性复合粒子。 相对于每个非磁性颗粒的表面上的非磁性颗粒的重量，细颗粒以0.1至20重量％的量存在，并且固定或锚定在每个非磁性颗粒的表面上 通过硅化合物。非磁性复合颗粒具有高抛光效果和高分散性，并且可用作磁记录介质的非磁性底涂层。

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：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：US07767034B2

公开(公告)日：2010-08-03

申请号：US11629976

申请日：2005-09-29

申请人： Toru Maeda ,  Naoto Igarashi ,  Haruhisa Toyoda ,  Hirokazu Kugai ,  Kazuyuki Hayashi ,  Hiroko Morii ,  Seiji Ishitani

发明人： Toru Maeda ,  Naoto Igarashi ,  Haruhisa Toyoda ,  Hirokazu Kugai ,  Kazuyuki Hayashi ,  Hiroko Morii ,  Seiji Ishitani

IPC分类号： H01F1/20 ,  H01F1/24 ,  B32B5/00

CPC分类号： B22F1/02 ,  B22F2998/10 ,  H01F1/24 ,  H01F1/26 ,  H01F41/0246 ,  Y10T428/2991 ,  B22F3/02 ,  B22F3/24

摘要： A soft magnetic material is a soft magnetic material including a composite magnetic particle (30) having a metal magnetic particle (10) mainly composed of Fe and an insulating coating (20) covering metal magnetic particle (10), and insulating coating (20) contains an iron phosphate compound and an aluminum phosphate compound. The atomic ratio of Fe contained in a contact surface of insulating coating (20) in contact with metal magnetic particle (10) is larger than the atomic ratio of Fe contained in the surface of insulating coating (20). The atomic ratio of Al contained in the contact surface of insulating coating (20) in contact with metal magnetic particle (10) is smaller than the atomic ratio of Al contained in the surface of insulating coating (20). Thus, iron loss can be reduced.

摘要翻译： 软磁性材料是包括具有主要由Fe构成的金属磁性粒子（10）和覆盖金属磁性粒子（10）的绝缘涂层（20）的复合磁性体（30）和绝缘涂层（20）的软磁性材料， 含有磷酸铁化合物和磷酸铝化合物。 包含在与金属磁性颗粒（10）接触的绝缘涂层（20）的接触表面中的Fe的原子比大于绝缘涂层（20）表面中所含的Fe的原子比。 绝缘涂层（20）与金属磁性颗粒（10）接触的接触表面中所含的Al的原子比小于绝缘涂层（20）表面中的Al的原子比。 因此，可以减少铁损。

公开(公告)号：US20090042064A1

公开(公告)日：2009-02-12

申请号：US12188343

申请日：2008-08-08

申请人： Seiji ISHITANI ,  Hiroko Morii ,  Kazuyuki Hayashi

发明人： Seiji ISHITANI ,  Hiroko Morii ,  Kazuyuki Hayashi

IPC分类号： G11B5/733

CPC分类号： G11B5/8404 ,  B82Y30/00 ,  C01G49/06 ,  C01P2004/64 ,  C01P2006/12 ,  C01P2006/80 ,  C04B35/62675 ,  C04B35/62802 ,  C04B35/62807 ,  C04B35/62813 ,  C04B35/62815 ,  C04B35/62894 ,  C04B2235/3272 ,  C04B2235/5276 ,  C04B2235/5296 ,  C04B2235/5409 ,  C04B2235/5436 ,  C04B2235/5445 ,  C04B2235/72 ,  C09C1/24 ,  G11B5/73 ,  Y10T428/2991

摘要： The present invention relates to non-magnetic particles for non-magnetic undercoat layer of magnetic recording medium, comprising: hematite particles; an inner coating layer comprising a phosphorus-containing inorganic compound which is formed on a surface of the respective hematite particles; and an outer coating layer comprising an aluminum-containing inorganic compound which is formed on an outside of the inner coating layer comprising the phosphorus-containing inorganic compound.

摘要翻译： 本发明涉及磁记录介质的非磁性底涂层的非磁性颗粒，其包括：赤铁矿颗粒; 包含在各赤铁矿颗粒的表面上形成的含磷无机化合物的内涂层; 以及包含含铝无机化合物的外涂层，其形成在包含含磷无机化合物的内涂层的外侧。

公开(公告)号：US5686012A

公开(公告)日：1997-11-11

申请号：US522723

申请日：1995-09-01

申请人： Kazuyuki Hayashi ,  Hiroko Morii ,  Mineko Sakoda ,  Minoru Ohsugi ,  Mamoru Kamigaki

发明人： Kazuyuki Hayashi ,  Hiroko Morii ,  Mineko Sakoda ,  Minoru Ohsugi ,  Mamoru Kamigaki

IPC分类号： C09C3/00 ,  C09C3/12 ,  C09D5/23 ,  C09D7/12 ,  G11B5/712 ,  G11B5/74 ,  H01F1/00

CPC分类号： B82Y30/00 ,  C09C3/006 ,  C09C3/12 ,  C09D7/1225 ,  C09D7/1275 ,  G11B5/712 ,  C01P2004/10 ,  C01P2004/20 ,  C01P2004/32 ,  C01P2004/38 ,  C01P2004/41 ,  C01P2004/42 ,  C01P2004/50 ,  C01P2004/54 ,  C01P2004/61 ,  C01P2004/62 ,  C01P2004/64 ,  C01P2004/80 ,  C01P2006/12 ,  C01P2006/60 ,  C01P2006/82 ,  C08K3/22 ,  C08K9/08 ,  Y10T428/2991 ,  Y10T428/2998

摘要： The disclosure describes modified particles comprising inorganic particles as core particles, and at least one polysiloxane modified with at least one selected from the group consisting of polyethers, polyesters and aralkyls, which is coated on the surfaces of said core particles.

摘要翻译： 本公开内容描述了包含无机颗粒作为核心颗粒的改性颗粒和至少一种被选自聚醚，聚酯和芳烷基中的至少一种的聚硅氧烷，其被涂覆在所述芯颗粒的表面上。

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。

公开(公告)号：US20100255188A1

公开(公告)日：2010-10-07

申请号：US12816833

申请日：2010-06-16

申请人： Toru MAEDA ,  Naoto Igarashi ,  Haruhisa Toyoda ,  Hirokazu Kugai ,  Kazuyuki Hayashi ,  Hiroko Morii ,  Seiji Ishitani

发明人： Toru MAEDA ,  Naoto Igarashi ,  Haruhisa Toyoda ,  Hirokazu Kugai ,  Kazuyuki Hayashi ,  Hiroko Morii ,  Seiji Ishitani

IPC分类号： B05D5/12

CPC分类号： B22F1/02 ,  B22F2998/10 ,  H01F1/24 ,  H01F1/26 ,  H01F41/0246 ,  Y10T428/2991 ,  B22F3/02 ,  B22F3/24

摘要： A soft magnetic material is a soft magnetic material including a composite magnetic particle (30) having a metal magnetic particle (10) mainly composed of Fe and an insulating coating (20) covering metal magnetic particle (10), and insulating coating (20) contains an iron phosphate compound and an aluminum phosphate compound. The atomic ratio of Fe contained in a contact surface of insulating coating (20) in contact with metal magnetic particle (10) is larger than the atomic ratio of Fe contained in the surface of insulating coating (20). The atomic ratio of Al contained in the contact surface of insulating coating (20) in contact with metal magnetic particle (10) is smaller than the atomic ratio of Al contained in the surface of insulating coating (20). Thus, iron loss can be reduced.

摘要翻译： 软磁性材料是包括具有主要由Fe构成的金属磁性粒子（10）和覆盖金属磁性粒子（10）的绝缘涂层（20）的复合磁性体（30）和绝缘涂层（20）的软磁性材料， 含有磷酸铁化合物和磷酸铝化合物。 包含在与金属磁性颗粒（10）接触的绝缘涂层（20）的接触表面中的Fe的原子比大于绝缘涂层（20）表面中所含的Fe的原子比。 绝缘涂层（20）与金属磁性颗粒（10）接触的接触表面中所含的Al的原子比小于绝缘涂层（20）表面中的Al的原子比。 因此，可以减少铁损。

公开(公告)号：US20090047519A1

公开(公告)日：2009-02-19

申请号：US12160079

申请日：2006-11-22

申请人： Toru Maeda ,  Naoto Igarashi ,  Haruhisa Toyoda ,  Seiji Ishitani ,  Hiroko Morii ,  Kazuyuki Hayashi

发明人： Toru Maeda ,  Naoto Igarashi ,  Haruhisa Toyoda ,  Seiji Ishitani ,  Hiroko Morii ,  Kazuyuki Hayashi

IPC分类号： B32B15/02 ,  B05D5/12

CPC分类号： H01F1/24 ,  B22F1/02 ,  B22F2998/10 ,  C22C33/02 ,  H01F1/26 ,  H01F3/08 ,  H01F41/0246 ,  Y10T428/2991 ,  Y10T428/2998 ,  B22F1/007 ,  B22F3/02 ,  B22F3/10

摘要： The soft magnetic material includes a plurality of composite magnetic particles having a metal magnetic particle and an insulating film surrounding the surface of the metal magnetic particle. The metal magnetic particle contains iron as the main component. The insulating film contains aluminum, silicon, phosphorus, and oxygen. The insulating film satisfies the relationship 0.4≦MAl/(MAl+MSi)≦0.9 and the relationship of 0.25≦(MAl+MSi)/MP≦1.0 in the case that molar amount of aluminum contained in the insulating film is represented by MAl, the sum of the molar amount of aluminum contained in the insulating film and the molar amount of silicon contained in the insulating film is represented by (MAl+MSi), and the molar amount of phosphorus contained in the insulating film is represented by MP.

摘要翻译： 软磁性材料包括具有金属磁性颗粒的多个复合磁性颗粒和围绕金属磁性颗粒表面的绝缘膜。 金属磁性粒子含有铁作为主要成分。 绝缘膜含有铝，硅，磷和氧。 在绝缘膜中含有的铝的摩尔量为绝对膜的情况下，绝缘膜满足关系0.4 <= MA1 /（MA1 + MSi）<= 0.9，0.25 <=（MA1 + MSi）/ MP < 由MA1表示，绝缘膜中所含的铝的摩尔量与绝缘膜中所含的硅的摩尔量之和表示为（MA1 + MSi），表示绝缘膜中所含的磷的摩尔量 由MP。