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。

公开(公告)号：US20050227070A1

公开(公告)日：2005-10-13

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： C01G49/02 ,  G03G9/083 ,  H01F1/34 ,  B32B5/16

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。

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。

公开(公告)号：US20080206566A1

公开(公告)日：2008-08-28

申请号：US12071389

申请日：2008-02-20

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

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

IPC分类号： B32B15/02

CPC分类号： 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

摘要： The present invention relates to a black magnetic iron oxide particles each having a polyhedral shape wherein when 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%.

摘要翻译： 本发明涉及一种具有多面体形状的黑色磁性氧化铁颗粒，其中当铁元素溶解在黑色磁性氧化铁颗粒中所含的铁元素的总量的百分比为50％时，溶解的百分比 基于黑色磁性氧化铁颗粒中所含的硫元素的总量的硫元素小于40％。

公开(公告)号：US07597958B2

公开(公告)日：2009-10-06

申请号：US12071389

申请日：2008-02-20

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

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

IPC分类号： B32B5/16

CPC分类号： 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

摘要： The present invention relates to a black magnetic iron oxide particles each having a polyhedral shape wherein when 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%.

摘要翻译： 本发明涉及一种具有多面体形状的黑色磁性氧化铁颗粒，其中当铁元素溶解在黑色磁性氧化铁颗粒中所含的铁元素的总量的百分比为50％时，溶解的百分比 基于黑色磁性氧化铁颗粒中所含的硫元素的总量的硫元素小于40％。

公开(公告)号：US09285698B2

公开(公告)日：2016-03-15

申请号：US12484318

申请日：2009-06-15

申请人： Shinji Uemoto ,  Hiromitsu Misawa ,  Ryo Iwai ,  Naoki Uchida ,  Koso Aoki ,  Kazuya Fujita ,  Kaori Kinoshita ,  Kazushi Takama ,  Eiichi Kurita

发明人： Shinji Uemoto ,  Hiromitsu Misawa ,  Ryo Iwai ,  Naoki Uchida ,  Koso Aoki ,  Kazuya Fujita ,  Kaori Kinoshita ,  Kazushi Takama ,  Eiichi Kurita

IPC分类号： G03G9/083 ,  G03G9/107 ,  G03G9/113

CPC分类号： G03G9/107 ,  G03G9/113 ,  G03G9/1135 ,  G03G9/1136

摘要： Black magnetic iron oxide particles having an average particle diameter of 0.05 to 2.0 μm and an electric resistance value at an applied voltage of 100 V of not less than 1×108 Ω·cm. Also a magnetic carrier for electrophotographic developer having spherical magnetic composite particles obtained by dispersing black magnetic iron oxide particles in a binder resin. The magnetic carrier has an electric resistance value R100 at an applied voltage of 100 V of 1×108 to 1×1014 Ω·cm, and an electric resistance value R300 at an applied voltage of 300 V which satisfies the relationship represented by the formula: 0.1≦R300/R100≦1.

摘要翻译： 平均粒径为0.05〜2.0μm，施加电压为100V的电阻值为1×10 8Ω·cm·cm以上的黑色磁性氧化铁粒子。 还有一种用于电子照相显影剂的磁性载体，其具有通过将黑色磁性氧化铁颗粒分散在粘合剂树脂中而获得的球形磁性复合颗粒。 磁载体在100V的施加电压为1×108〜1×1014＆OHgr·cm时具有电阻值R100，在300V的施加电压下的电阻值R300满足式 ：0.1＆nlE; R300 / R100＆nlE; 1。

公开(公告)号：US20090311617A1

公开(公告)日：2009-12-17

申请号：US12484318

申请日：2009-06-15

申请人： Shinji Uemoto ,  Hiromitsu Misawa ,  Ryo Iwai ,  Naoki Uchida ,  Koso Aoki ,  Kazuya Fujita ,  Kaori Kinoshita ,  Kazushi Takama ,  Eiichi Kurita

发明人： Shinji Uemoto ,  Hiromitsu Misawa ,  Ryo Iwai ,  Naoki Uchida ,  Koso Aoki ,  Kazuya Fujita ,  Kaori Kinoshita ,  Kazushi Takama ,  Eiichi Kurita

IPC分类号： G03G9/083

CPC分类号： G03G9/107 ,  G03G9/113 ,  G03G9/1135 ,  G03G9/1136

摘要： The present invention relates to black magnetic iron oxide particles having an average particle diameter of 0.05 to 2.0 μm and an electric resistance value at an applied voltage of 100 V of not less than 1×108 Ω·m; and a magnetic carrier for electrophotographic developer comprising spherical magnetic composite particles obtained by dispersing black magnetic iron oxide particles in a binder resin, wherein the magnetic carrier has an electric resistance value R100 at an applied voltage of 100 V of 1×108 to 1×1014 Ω·m, and an electric resistance value R300 at an applied voltage of 300 V which satisfies the relationship represented by the formula: 0.1≦R300/R100≦1.

摘要翻译： 本发明涉及平均粒径为0.05〜2.0μm的黑色磁性氧化铁颗粒，100V的施加电压下的电阻值不小于1×10 8Ω·m。 和一种用于电子照相显影剂的磁性载体，其包含通过将黑色磁性氧化铁颗粒分散在粘合剂树脂中而获得的球形磁性复合颗粒，其中该磁性载体在100V的施加电压为1×10 8至1×10 14Ω·m的电阻值R100， 以及在300V的施加电压下的电阻值R300，其满足由下式表示的关系：0.1R300 / R100

公开(公告)号：US20070254157A1

公开(公告)日：2007-11-01

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 ,  B32B15/02

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。

公开(公告)号：US5652060A

公开(公告)日：1997-07-29

申请号：US663681

申请日：1996-06-14

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 ,  C01G49/08

CPC分类号： G03G9/0836 ,  G03G9/0833 ,  G03G9/0834 ,  G03G9/0835 ,  G03G9/0837 ,  G03G9/0838 ,  Y10T428/2993

摘要： Spherical magnetic iron oxide particles for a magnetic toner comprise:Fe.sup.2+ -containing iron oxide particles having an average particle diameter of 0.05 to 0.30 .mu.m,containing 1.7 to 4.5 atm % of silicon, calculated as Si, based on Fe and not more than 0.35 wt % of sulfur based on the total weight of said Fe.sup.2+ -containing iron oxide particles, andhaving a sphericity .phi. (.phi.=l/w) of 0.8 to 1.0, and a coercive force (Hc) and the average particle diameter (d .mu.m) which satisfy the following relationship:147-322.7.times.d.ltoreq.Hc.sub.(10 kOe) .ltoreq.207-322.7.times.d.

摘要翻译： 用于磁性调色剂的球形磁性氧化铁颗粒包含：平均粒径为0.05-0.30μm的含Fe 2+的氧化铁颗粒，其含量为Si至Si：1.7至4.5atm％，以Fe计，不大于0.35 基于所述含Fe 2+的氧化铁颗粒的总重量，并且球形度phi（phi = 1 / w）为0.8至1.0，矫顽力（Hc）和平均粒径（d mu） m）满足以下关系：147-322.7xd

公开(公告)号：US6103437A

公开(公告)日：2000-08-15

申请号：US141410

申请日：1998-08-27

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

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

IPC分类号： B32B5/16 ,  C01G49/00 ,  C01G49/08 ,  G03G9/083

CPC分类号： B82Y30/00 ,  C01G49/08 ,  G03G9/0834 ,  G03G9/0836 ,  G03G9/0837 ,  G03G9/0838 ,  G03G9/0839 ,  C01P2002/52 ,  C01P2004/03 ,  C01P2004/50 ,  C01P2004/52 ,  C01P2004/62 ,  C01P2004/64 ,  C01P2006/12 ,  C01P2006/19 ,  C01P2006/40 ,  Y10S428/90 ,  Y10T428/2982 ,  Y10T428/2991 ,  Y10T428/2998

摘要： Magnetite particles of the present invention have an average particle diameter of 0.05 to 0.50 .mu.m, each of the magnetite particles having a plurality of mountain-shaped protrusions with unsharpened crests on a surface of each magnetite particle, and the number of the mountain-shaped protrusions formed on the surface of each magnetite particle being in the range of 2 to 30 when viewed in projected plan; magnetic iron oxide particles for magnetic toner comprising not less than 60%, in particle number, of the said magnetite particles; and a magnetic toner comprising the said magnetic iron oxide particles and a binder resin. The magnetite particles of the present invention are free from the falling-off from toner particles. The toner particles of the present invention shows a good fluidity and produces visual images having a higher definition upon development of electrostatic latent images.

摘要翻译： 本发明的磁铁矿颗粒的平均粒径为0.05〜0.50μm，每个磁铁矿颗粒在每个磁铁矿颗粒的表面上具有多个具有未钝化峰的山形突起，并且山形 在投影平面中观察时，形成在每个磁铁矿颗粒表面上的突起在2至30范围内; 用于磁性调色剂的磁性氧化铁颗粒包含颗粒数不小于60％的所述磁铁矿颗粒; 以及包含所述磁性氧化铁颗粒和粘合剂树脂的磁性调色剂。 本发明的磁铁矿颗粒不脱离调色剂颗粒。 本发明的调色剂颗粒显示出良好的流动性，并且在显影静电潜像时产生具有更高清晰度的视觉图像。