公开(公告)号：DE69526704T2

公开(公告)日：2002-11-21

申请号：DE69526704

申请日：1995-09-01

Applicant: TODA KOGYO CORP

Inventor： HAYASHI KAZUYUKI ,  MORII HIROKO ,  SAKODA MINEKO ,  OHSUGI MINORU ,  KAMIGAKI MAMORU

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

Abstract: Particles comprising inorganic core particles and, provided on the core particles, at least one polysiloxane modified with at least one selected from polyethers, polyesters and aralkyls, are useful in water-based paints.

公开(公告)号：DE69526704D1

公开(公告)日：2002-06-20

申请号：DE69526704

申请日：1995-09-01

Applicant: TODA KOGYO CORP

Inventor： HAYASHI KAZUYUKI ,  MORII HIROKO ,  SAKODA MINEKO ,  OHSUGI MINORU ,  KAMIGAKI MAMORU

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

Abstract: Particles comprising inorganic core particles and, provided on the core particles, at least one polysiloxane modified with at least one selected from polyethers, polyesters and aralkyls, are useful in water-based paints.

公开(公告)号：EP2415714A4

公开(公告)日：2016-08-03

申请号：EP10758725

申请日：2010-03-30

Applicant: TODA KOGYO CORP

Inventor： IWAI RYO ,  KAMIGAKI MAMORU ,  SHIMO NOBUYA ,  UCHIDA NAOKI

IPC: C01G49/08 ,  B82Y30/00 ,  G03G9/083 ,  G03G9/087 ,  H01F1/34 ,  H01F1/36

CPC classification number: H01F1/36 ,  B82Y30/00 ,  C01G49/08 ,  C01P2004/03 ,  C01P2004/62 ,  C01P2004/64 ,  C01P2006/12 ,  C01P2006/42 ,  G03G9/0833 ,  G03G9/0835 ,  G03G9/0836 ,  G03G9/0838 ,  H01F1/344 ,  Y10T428/2982

Abstract: The present invention relates to black magnetic iron oxide particles comprising magnetite as a main component, wherein when the black magnetic iron oxide particles are molded into a tablet shape, an electric resistance value of the tablet in an alternating current electric field is controlled to produce an impedance of not less than 2 x 10 6 ©cm as measured in a characteristic frequency range thereof. The black magnetic iron oxide particles according to the present invention can provide a toner capable of exhibiting a good charging performance and a uniform charging property under the high-temperature and high-humidity conditions, so that when developing an electrostatic latent image therewith, it is possible to obtain toner images having a high resolution or definition, and further the use of heavy metal elements in the black magnetic iron oxide particles can be minimized.

公开(公告)号：JP2003002657A

公开(公告)日：2003-01-08

申请号：JP2001177817

申请日：2001-06-12

Applicant: Toda Kogyo Corp ,  戸田工業株式会社

Inventor： HAYASHI KAZUYUKI ,  IWASAKI KEISUKE ,  KAMIGAKI MAMORU ,  MORII HIROKO

IPC: C01G49/06 ,  G11B5/735

Abstract: PROBLEM TO BE SOLVED: To obtain a magnetic recording medium, excellent in stiffness and a traveling durability, reducing a drop out as low as possible, and having a low optical transmissivity.
SOLUTION: A plate-like composite nonmagnetic particle powder, having an average plate diameter of 0.1-5.0 μm and an average thickness of 0.001-0.1 μm, and a plate ratio of 5-100, comprises a plate-like hematite particle powder, having a surface coated with an organosilane compound or a polysiloxane, which are generated from an alkoxysilane, and also having a coated film with an organic pigment adhered thereto. The plate-like composite nonmagnetic particle powder for the back coat layer of the magnetic recording medium is such one that the amount of an organic pigment adhered to the coated film is 1-100 pts.wt., based on the plate-like hematite particle powder of 100 pts.wt. The magnetic recording medium, using the plate-like composite nonmagnetic particle powder as a back coat layer, is provided.
COPYRIGHT: (C)2003,JPO

Abstract translation: 要解决的问题：为了获得硬度和行驶耐久性优异的磁记录介质，尽可能地降低掉落，并具有低透光率。 解决方案：平板直径为0.1-5.0μm，平均厚度为0.001-0.1μm，板比为5-100的板状复合非磁性颗粒粉末包括板状赤铁矿颗粒粉末，其具有 涂有由烷氧基硅烷生成的有机硅烷化合物或聚硅氧烷的表面，并且还具有粘附有有机颜料的涂膜。 用于磁记录介质的背涂层的板状复合非磁性颗粒粉末是这样的，即，附着在涂膜上的有机颜料的量基于板状赤铁矿颗粒为1-100重量份 100磅重的粉末 提供了使用板状复合非磁性粒子粉末作为背涂层的磁记录介质。

公开(公告)号：JP2003002655A

公开(公告)日：2003-01-08

申请号：JP2001177829

申请日：2001-06-12

Applicant: Toda Kogyo Corp ,  戸田工業株式会社

Inventor： HAYASHI KAZUYUKI ,  KAMIGAKI MAMORU ,  MORII HIROKO

IPC: C01G49/00 ,  G11B5/712 ,  G11B5/80 ,  H01F1/11 ,  H01F1/113

CPC classification number: H01F1/113

Abstract: PROBLEM TO BE SOLVED: To obtain a plate-like complex magnetoplumbite type ferrite particle powder for magnetic cards, excellent in dispersability and having a high resin adsorbing strength, and also to provide a magnetic card which is excellent in durability, a surface smoothness, and an electromagnetic transducing characteristic. SOLUTION: The plate-like composite magnetoplumbite type ferrite particle powder, having an average particle diameter of 0.21-2.0 μm, comprises a plate- like magnetoplumbite type ferrite particle powder, having a surface coated with an organosilane compound or a polysiloxane, which are generated from an alkoxysilane, and also having a coated film with an organic pigment adhered thereto. The amount of the organic pigment adhered to the coated film is 1-100 pts. wt., based on the plate-like magnetoplumbite type ferrite particle powder of 100 pts.wt.

Abstract translation: 要解决的问题为了获得用于磁卡的板状复合磁铅石型铁氧体颗粒粉末，其分散性优异并且具有高树脂吸附强度，并且还提供了一种耐久性优异，表面光滑度优异的磁卡和 电磁传感特性。 解决方案：平均粒径为0.21-2.0μm的板状复合磁铅石型铁氧体颗粒粉末包括具有表面涂覆有机硅烷化合物或聚硅氧烷的板状磁铅石型铁氧体颗粒粉末，其产生 并且还具有粘附有有机颜料的涂膜。 附着在涂膜上的有机颜料的量为1-100个。 基于100重量份的板状磁铅石型铁氧体颗粒粉末

公开(公告)号：JP2001143241A

公开(公告)日：2001-05-25

申请号：JP32619099

申请日：1999-11-16

Applicant: TODA KOGYO CORP

Inventor： HAYASHI KAZUYUKI ,  MORII HIROKO ,  KAMIGAKI MAMORU ,  ISHITANI SEIJI

IPC: G11B5/708 ,  C01G49/06

Abstract: PROBLEM TO BE SOLVED: To provide a magnetic recording medium having excellent durability, good electromagnetic conversion characteristics, a lower light transmissivity and a lower surface electric resistance value, since the reduction of the electromagnetic conversion characteristics can be suppressed even if the volume of a filler material required for enhancing durability is added. SOLUTION: The magnetic recording medium consisting of a non-magnetic substrate, a non-magnetic base layer including a non-magnetic powder and a bonding agent resin and formed on the non-magnetic substrate and a magnetic recording layer including magnetic particle powder, the filler material and a bonding agent resin and formed on the non-magnetic base layer is characterized in so that hematite particle powder has a coating layer consisting of an organo-silane compound or polysiloxane formed from alkoxysilane on the particle surface thereof and 1-60 pts.wt. carbon black to 100 pts.wt. hematite particle powder is added to the coating layer to form a black composite hematite particle powder having 0.08-1.0 μm average particle size and the black composite hematite particle powder is used as the filler material.

公开(公告)号：JP2001002424A

公开(公告)日：2001-01-09

申请号：JP2000114837

申请日：2000-04-17

Applicant: TODA KOGYO CORP

Inventor： HAYASHI KAZUYUKI ,  MORII HIROKO ,  KAMIGAKI MAMORU ,  TANAKA YASUYUKI ,  IWASAKI KEISUKE

IPC: C01G49/06 ,  C01G49/08 ,  G11B5/712 ,  H01F1/11

Abstract: PROBLEM TO BE SOLVED: To provide an acicular black composite magnetic particle powder which enables the production of a magnetic recording medium having low light- transmissivity even when the amount of a carbon black fine particle powder added to a magnetic recording layer is adjusted small as possible, a low surface electric resistance value and also a flat and smooth surface. SOLUTION: In this acicular magnetic particle powder, the surface of each of the particles is coated with a polysiloxane and also, fine-powdery carbon black is stuck to at least a part of the resulting polysiloxane coating in an amount sufficient to provide a 0.5 to 10 pts.wt. ratio of the carbon black to 100 pts.wt. of the acicular magnetic particle powder and further, the acicular particles have a 0.051-0.72 μm average major axis size.

公开(公告)号：JP2000036404A

公开(公告)日：2000-02-02

申请号：JP10363399

申请日：1999-04-12

Applicant: TODA KOGYO CORP

Inventor： HAYASHI KAZUYUKI ,  MORII HIROKO ,  KAMIGAKI MAMORU ,  TANAKA YASUYUKI ,  IWASAKI KEISUKE

IPC: G11B5/712 ,  C01G49/00 ,  H01F1/11

Abstract: PROBLEM TO BE SOLVED: To obtain magnetic granular powder through which magnetic recording medium can be realized, where the magnetic recording medium is small in light transmittance, even if carbon black added to a magnetic recording layer is reduced to an irreducible minimum amount, low in surface electric resistance, and high in surface smoothness. SOLUTION: Needle magnetic granular powder is coated with organosilane compound, made of alcoxysilane for the formation of this magnetic granular powder, and carbon black fine granular powder 0.002 to 0.05 μm in average grain diameter is attached to organosilane compound coating for the formation of needle black composite magnetic granular powder 0.051 to 0.72 μm in average major axis, wherein 0.5 to 10 pts.wt. of carbon black fine granular powder is attached with respect to 100 pts.wt. of needle magnetic granular powder.

公开(公告)号：JP2009167032A

公开(公告)日：2009-07-30

申请号：JP2008004671

申请日：2008-01-11

Applicant: Toda Kogyo Corp ,  戸田工業株式会社

Inventor： IWAI AKIRA ,  KAMIGAKI MAMORU ,  SHIMO SHINYA ,  UCHIDA NAOKI

IPC: C01G49/08 ,  C01B33/12 ,  G03G9/083 ,  H01F1/34 ,  H01F1/36

Abstract: PROBLEM TO BE SOLVED: To provide magnetic iron oxide particulate powder for a magnetic toner which does not drop out from toner particles, ensures good fluidity as a toner and hardly inhibits charging of the toner because of a small area of a magnetic material surface exposed on the toner surface to improve the charging performance of the toner, thereby giving a toner having high image density even in a high-temperature and high-humidity environment and also having high image density-maintaining property. SOLUTION: The magnetic iron oxide particulate powder has a spherical particle shape as a basic shape and has angular protrusions on a particle surface. A method for producing such magnetite particulate powder includes a two-step reaction comprising a reaction of an aqueous ferrous salt solution with an aqueous alkali hydroxide solution to form magnetite seed crystal particles and a growth reaction of the seed crystal particles, wherein pH in the first-step reaction is adjusted to a range of 7.0-8.5, and in the second-step reaction, a ferrous salt solution is added in an amount of 1.0-30.0 at.% relative to the amount of Fe in the first-step reaction. COPYRIGHT: (C)2009,JPO&INPIT

Abstract translation: 要解决的问题：为了提供不会从调色剂颗粒中脱落的磁性调色剂的磁性氧化铁颗粒粉末，确保作为调色剂的良好的流动性，并且由于磁性材料的小面积几乎不能阻止调色剂的充电 表面暴露在调色剂表面上以改善调色剂的带电性能，从而即使在高温高湿环境下也具有高图像浓度的调色剂，并且还具有高图像密度维持性。 解决方案：磁性氧化铁颗粒粉末具有球形颗粒形状作为基本形状，并且在颗粒表面上具有角突起。 制造这种磁铁矿颗粒粉末的方法包括两步反应，其包括含水亚铁盐水溶液与碱金属氢氧化物水溶液的反应以形成磁铁矿晶种颗粒和晶种颗粒的生长反应，其中第一 - 步骤反应调节至7.0-8.5的范围，在第二步反应中，相对于第一步反应中的Fe的量，加入亚铁盐溶液的量为1.0-30.0原子％。 版权所有（C）2009，JPO＆INPIT

公开(公告)号：JP2008230960A

公开(公告)日：2008-10-02

申请号：JP2008040971

申请日：2008-02-22

Applicant: Toda Kogyo Corp ,  戸田工業株式会社

Inventor： UEMOTO SHINJI ,  UCHIDA NAOKI ,  KAMIGAKI MAMORU ,  IWAI AKIRA ,  MISAWA HIROMITSU ,  AOKI ISATAKA

IPC: C01G49/08 ,  G03G9/083

CPC classification number: C01G49/08 ,  C01P2004/62 ,  C01P2006/12 ,  C01P2006/42 ,  C01P2006/63 ,  C01P2006/80 ,  G03G9/0833 ,  G03G9/0834 ,  G03G9/0836 ,  G03G9/0837 ,  Y10S428/90 ,  Y10T428/2982 ,  Y10T428/2991

Abstract: PROBLEM TO BE SOLVED: To provide black magnetic iron oxide particles having a polyhedral shape comprising magnetic particles having a high blackness, and a magnetic toner having a high blackness when the magnetic toner is produced by using the black magnetic iron oxide particles of the present invention. SOLUTION: The black magnetic iron oxide particles have a polyhedral shape, wherein a percentage of dissolution of iron element based on a total amount of iron element contained in the black magnetic iron oxide particles is 50%, a percentage of dissolution of sulfur element based on a total amount of sulfur element contained in the black magnetic iron oxide particles is less than 40%, and the content of sulfur is 0.02-0.50% by weight. COPYRIGHT: (C)2009,JPO&INPIT

Abstract translation: 要解决的问题：提供具有包括具有高黑色度的磁性颗粒的多面体形状的黑色磁性氧化铁颗粒和当通过使用黑色磁性氧化铁颗粒制备磁性调色剂时具有高黑色度的磁性调色剂 本发明。 解决方案：黑色磁性氧化铁颗粒具有多面体形状，其中铁元素基于黑色磁性氧化铁颗粒中含有的铁元素总量的溶解百分比为50％，硫的溶解百分比 基于黑色磁性氧化铁颗粒中所含的硫元素总量的元素小于40％，硫含量为0.02-0.50重量％。 版权所有（C）2009，JPO＆INPIT