公开(公告)号：US06780555B2

公开(公告)日：2004-08-24

申请号：US10051376

申请日：2002-01-22

申请人： Naoki Uchida ,  Minoru Kouzawa ,  Hiromitsu Misawa ,  Koso Aoki ,  Suehiko Miura

发明人： Naoki Uchida ,  Minoru Kouzawa ,  Hiromitsu Misawa ,  Koso Aoki ,  Suehiko Miura

IPC分类号： G03G9083

CPC分类号： G03G9/0838 ,  G03G9/0831 ,  G03G9/0832 ,  G03G9/0833 ,  G03G9/0839 ,  H01F1/112 ,  Y10T428/2991

摘要： Black magnetic iron oxide particles having an average particle diameter of 0.05 to 1.0 &mgr;m have a three-phase structure comprising: a core portion containing at least one metal element other than Fe selected from the group consisting of Mn, Zn, Cu, Ni, Cr, Cd, Sn, Mg, Ti, Ca and Al in an amount of 0.1 to 10% by weight based on whole Fe contained in the particles; a surface coat portion containing at least one metal element other than Fe selected from the group consisting of Mn, Zn, Cu, Ni, Cr, Cd, Sn, Mg, Ti, Ca and Al in an amount of 0.1 to 10% by weight based on whole Fe contained in the particles; and an intermediate layer disposed between the core portion and the surface coat portion, containing substantially none of the metal elements other than Fe.

摘要翻译： 平均粒径为0.05〜1.0μm的黑色磁性氧化铁颗粒具有三相结构，包括：含有选自Mn，Zn，Cu，Ni，Cr中的至少一种不同于Fe的金属元素的芯部 ，Cd，Sn，Mg，Ti，Ca和Al的量为0.1〜10重量％，含有Fe以外的Fe以外的至少一种以上的金属元素， Mn，Zn，Cu，Ni，Cr，Cd，Sn，Mg，Ti，Ca和Al，相对于颗粒中所含的全部Fe为0.1〜10重量％ 并且设置在芯部和表面涂层部之间的中间层，其中基本上不含Fe以外的金属元素。

公开(公告)号：US06383637B1

公开(公告)日：2002-05-07

申请号：US09549183

申请日：2000-04-13

申请人： Hiromitsu Misawa ,  Koso Aoki ,  Suehiko Miura ,  Minoru Kozawa ,  Naoki Uchida ,  Nobuya Shimo

发明人： Hiromitsu Misawa ,  Koso Aoki ,  Suehiko Miura ,  Minoru Kozawa ,  Naoki Uchida ,  Nobuya Shimo

IPC分类号： B32B516

CPC分类号： G03G9/0839 ,  C01P2002/32 ,  C01P2004/50 ,  C01P2004/54 ,  C01P2004/61 ,  C01P2004/62 ,  C01P2004/80 ,  C01P2004/86 ,  C01P2006/12 ,  C01P2006/20 ,  C01P2006/22 ,  C01P2006/40 ,  C01P2006/42 ,  C01P2006/60 ,  C01P2006/63 ,  C01P2006/80 ,  C09C1/24 ,  G03G9/0833 ,  G03G9/0835 ,  G03G9/0837 ,  Y10S428/90 ,  Y10T428/24802 ,  Y10T428/24835 ,  Y10T428/24909 ,  Y10T428/2991 ,  Y10T428/2998

摘要： Black magnetic iron oxide particles of the present invention having an average particle diameter of 0.1 to 0.3 &mgr;m, comprise: black spinel iron oxide particles as core particles; and a surface coat formed on the surface of each core particle, comprising fine spinel iron oxide particles, the content of FeO in a surface layer having a thickness of from a surface of each black magnetic iron oxide particle to about 3.5% per a radius of each black magnetic iron oxide particle, being 8 to 14% by weight based on the weight of Fe contained in said surface layer. Such black magnetic iron oxide particles not only have a sufficient blackness and excellent electrical properties, flowability and electrification property (charging property), but also exhibit a good compatibility with binder resins such as aromatic vinyl-based resins, acrylic-based resins and copolymer resins thereof, and a good dispersibility in these resins for a magnetic toner.

摘要翻译： 平均粒径为0.1〜0.3μm的本发明的黑色磁性氧化铁颗粒包括：作为核心颗粒的黑色尖晶石氧化铁颗粒; 并且在每个核心颗粒的表面上形成的包含细尖晶石氧化铁颗粒的表面涂层，具有从每个黑色磁性氧化铁颗粒的表面的厚度的表层中的FeO含量相对于每个半径为约3.5％ 黑色磁性氧化铁颗粒，以所述表面层中所含的Fe的重量计为8〜14重量％。这种黑色磁性氧化铁颗粒不仅具有足够的黑色和优异的电性能，流动性和起电性（带电性） 而且还表现出与诸如芳族乙烯基类树脂，丙烯酸类树脂及其共聚物树脂之类的粘合剂树脂的良好相容性，并且在这些用于磁性调色剂的树脂中具有良好的分散性。