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    Magnetic particles for magentic toner and process for producing the same
    7.
    发明授权
    Magnetic particles for magentic toner and process for producing the same 失效
    用于磁性调色剂的磁性颗粒及其制备方法

    公开(公告)号：US5843610A

    公开(公告)日：1998-12-01

    申请号：US955104

    申请日：1997-10-21

    申请人： Naoki Uchida ,  Kazuo Fujioka ,  Koso Aoki ,  Hiromitsu Misawa ,  Minoru Kozawa

    发明人： Naoki Uchida ,  Kazuo Fujioka ,  Koso Aoki ,  Hiromitsu Misawa ,  Minoru Kozawa

    IPC分类号： G03G9/083

    CPC分类号： G03G9/083 ,  G03G9/0833 ,  G03G9/0834 ,  G03G9/0835 ,  G03G9/0836 ,  G03G9/0837 ,  G03G9/0838 ,  G03G9/0839 ,  Y10T428/2991 ,  Y10T428/2993 ,  Y10T428/2995

    摘要： A magnetic toner containing 100 parts by weight of magnetic Fe.sup.2+ -containing iron oxide particles having an average particle size of 0.05 to 0.30 .mu.m, containing not less than 0.9 atm % and less than 1.7 atm % of silicon, calculated as Si, based on Fe, having a substantially cubic shape each ridge of which has a curved surface, and having a ratio .phi. represented by the following formula of more than 1.0 and less than 1.4: .phi.=l/w wherein l represents an average maximum length of said Fe.sup.2+ -containing particles and w represents an average minimum length of said Fe.sup.2+ -containing particles, and 10 to 900 parts by weight of a toner resin.

    摘要翻译： 含有100重量份平均粒径为0.05-0.30μm的含Fe 2+的含铁氧化物颗粒的磁性调色剂，其含有不低于0.9atm％且小于1.7atm％的硅，以Si计，基于 Fe，具有基本上立方体形状，其每个脊具有弯曲表面，并且具有由以下公式表示的大于1.0且小于1.4的比率phi = 1 / w，其中l表示所述Fe 2+的平均最大长度， 并且w表示所述含Fe 2+的颗粒的平均最小长度，和10至900重量份的调色剂树脂。

    Black magnetic iron oxide particles having high breakdown voltage
    9.
    发明授权
    Black magnetic iron oxide particles having high breakdown voltage 有权
    具有高击穿电压的黑色磁性氧化铁颗粒

    公开(公告)号：US07572505B2

    公开(公告)日：2009-08-11

    申请号：US11785737

    申请日：2007-04-19

    申请人： Naoki Uchida ,  Ryo Iwai ,  Mamoru Kamigaki ,  Shinji Uemoto ,  Koso Aoki ,  Hiromitsu Misawa

    发明人： Naoki Uchida ,  Ryo Iwai ,  Mamoru Kamigaki ,  Shinji Uemoto ,  Koso Aoki ,  Hiromitsu Misawa

    IPC分类号： B32B5/16

    CPC分类号： H01F1/36 ,  C01G49/08 ,  C01P2006/10 ,  C01P2006/12 ,  C01P2006/42 ,  C08K3/22 ,  C08K9/02 ,  C09C1/24 ,  C09D7/62 ,  C09D7/68 ,  G03G9/0833 ,  G03G9/0834 ,  G03G9/0836 ,  G03G9/0837 ,  G03G9/0838 ,  G03G9/107 ,  Y10S428/90 ,  Y10T428/257 ,  Y10T428/2991 ,  Y10T428/2993

    摘要： The present invention relates to black magnetic iron oxide particles comprising core particles and a surface layer formed on a surface of the respective core particles which is made of a compound of at least one alkali earth metal element selected from the group consisting of Mg, Ca, Sr and Ba and an aluminum element, in which a content of the at least one alkali earth metal element present in the surface layer is from 100 ppm to 1000 ppm on the basis of a whole weight of the black magnetic iron oxide particles; a content of the aluminum element present in the surface layer is from 1000 ppm to 20000 ppm on the basis of a whole weight of the black magnetic iron oxide particles; a ratio [A/B] of the content [A (ppm)] of the aluminum element to the content [B (ppm)] of the at least one alkali earth metal element present in the surface layer is from 1 to 100; and a molded product comprising said black magnetic iron oxide particles has a breakdown voltage of not less than 400 V/cm.

    摘要翻译： 本发明涉及包含核心颗粒的黑色磁性氧化铁颗粒和形成在各个芯颗粒的表面上的表面层，该表面层由选自Mg，Ca， Sr和Ba以及基于黑色磁性氧化铁颗粒的总重量，表面层中存在的至少一种碱土金属元素的含量为100ppm至1000ppm的铝元素; 基于黑色磁性氧化铁颗粒的总重量，表面层中存在的铝元素的含量为1000ppm至20000ppm; 铝元素的含量[A（ppm）]与表面层中的至少一种碱土类金属元素的含量[B（ppm）]的比[A / B]为1〜100， 并且包含所述黑色磁性氧化铁颗粒的成型体具有不低于400V / cm的击穿电压。

    Magnetic iron oxide particles and magnetic toner using the same
    10.
    发明授权
    Magnetic iron oxide particles and magnetic toner using the same 有权
    磁性氧化铁颗粒和使用其的磁性调色剂

    公开(公告)号：US07144626B2

    公开(公告)日：2006-12-05

    申请号：US11097377

    申请日：2005-04-04

    申请人： Hiroshi Akai ,  Koso Aoki ,  Hiromitsu Misawa ,  Naoki Uchida ,  Ryo Iwai

    发明人： Hiroshi Akai ,  Koso Aoki ,  Hiromitsu Misawa ,  Naoki Uchida ,  Ryo Iwai

    IPC分类号： B32B5/16 ,  B32B9/00 ,  B32B15/02 ,  B32B17/02 ,  B32B19/00

    CPC分类号： H01F1/344 ,  Y10T428/2982

    摘要： There are provided magnetic iron oxide particles having an average particle diameter (Dp50) of primary particles of 0.05 to 0.3 μm, an average particle diameter (Da50) of secondary particles of 0.055 to 0.9 μm, and a ratio of the average particle diameter (Da50) of the secondary particles to the average particle diameter (Dp50) of the secondary particles (Da50/Dp50) of 1.1 to 3.0, as well as a magnetic toner containing the magnetic iron oxide particles. The magnetic iron oxide particles of the present invention are in the form of small agglomerated particles and exhibit an excellent dispersibility, and the magnetic toner using the magnetic iron oxide particles is excellent in electrification stability.

    摘要翻译： 提供了一次粒子的平均粒径（Dp <50％）为0.05〜0.3μm的磁性氧化铁粒子，二次粒子的平均粒径（Da <50％） 为0.055〜0.9μm，二次粒子的平均粒径（Da <50％）与二次粒子的平均粒径（Dp <50） Da 50 / Dp 50 50）为1.1〜3.0，以及含有磁性氧化铁颗粒的磁性调色剂。 本发明的磁性氧化铁颗粒呈小团聚颗粒的形式并表现出优异的分散性，并且使用磁性氧化铁颗粒的磁性调色剂具有优良的起电稳定性。