公开(公告)号：EP0867407A3

公开(公告)日：1999-09-22

申请号：EP98302324.3

申请日：1998-03-26

申请人： TODA KOGYO CORP.

发明人： Hayashi, Kazuyuki ,  Iwasaki, Keisuke ,  Tanaka, Yasuyuki ,  Morii, Hiroko

IPC分类号： C01G49/06 ,  G11B5/704

CPC分类号： B82Y30/00 ,  C01G49/06 ,  C01P2004/10 ,  C01P2004/54 ,  C01P2004/62 ,  C01P2004/64 ,  C01P2004/84 ,  C01P2006/12 ,  C01P2006/22 ,  C01P2006/40 ,  C01P2006/42 ,  C01P2006/80 ,  G11B5/708 ,  G11B5/738 ,  Y10T428/24355 ,  Y10T428/257 ,  Y10T428/265 ,  Y10T428/2991

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 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 µm, 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 SO 4 . Such high-density acicular hematite particles are 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.

公开(公告)号：EP0923068A2

公开(公告)日：1999-06-16

申请号：EP98309710.6

申请日：1998-11-26

申请人： TODA KOGYO CORP.

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

IPC分类号： G11B5/704

CPC分类号： G11B5/733 ,  Y10S428/90 ,  Y10T428/257 ,  Y10T428/2993

摘要： A magnetic recording medium comprising:

a base film;
a non-magnetic undercoat layer on said base film, said undercoat layer comprising a binder resin and non-magnetic acicular particles comprising iron as a main component and within the particles from 0.05 to 30 % by weight of zirconium, calculated as Zr, based on the total weight of the particles; and
a magnetic recording layer on said non-magnetic undercoat layer comprising magnetic particles and a binder resin.

摘要翻译： 一种磁记录介质，包括：基膜; 在所述基膜上的非磁性底涂层，所述底涂层包含粘合剂树脂和包含铁作为主要组分的非磁性针状颗粒，并且在所述颗粒内包含0.05至30重量％的锆，以Zr计，基于 颗粒的总重量; 和在包含磁性颗粒和粘合剂树脂的所述非磁性底涂层上的磁记录层。

公开(公告)号：EP0887387A2

公开(公告)日：1998-12-30

申请号：EP98304940.4

申请日：1998-06-23

申请人： TODA KOGYO CORP.

发明人： Morii, Hiroko ,  Ohsugi, Mineko ,  Hayashi, Kazuyuki ,  Sumita, Hiroshi

IPC分类号： C09C1/24 ,  C11D7/12 ,  C08K9/02

CPC分类号： B82Y30/00 ,  C01P2004/03 ,  C01P2004/50 ,  C01P2004/51 ,  C01P2004/54 ,  C01P2004/62 ,  C01P2004/64 ,  C01P2004/84 ,  C01P2006/12 ,  C01P2006/60 ,  C01P2006/62 ,  C01P2006/63 ,  C01P2006/64 ,  C01P2006/66 ,  C01P2006/80 ,  C08K9/02 ,  C09C1/24 ,  Y10T428/2991 ,  C08L21/00

摘要： Yellow iron oxide hydroxide particles suitable for use as a pigment comprise iron oxide hydroxide core particles provided with a composite oxide hydroxide of Fe and Al on the surface thereof, wherein:

(i) the amount of Al in the composite oxide hydroxide is from 0.1 to 10 % by weight, calculated as Al, based on the weight of the iron oxide hydroxide core particle;
(ii) the amount of Fe in the composite oxide hydroxide is 0.1 to 50 % by weight, calculated as Fe, based on the weight of the iron oxide hydroxide core particle;
(iii) the ratio of Al to Fe in the composite oxide hydroxide is from 0.05:1 to 2:1, calculated as Al and Fe atoms; and
(iv) said yellow iron oxide hydroxide particles have an average major axis diameter of from 0.1 to 1.0 µm, an average minor axis diameter of from 0.02 to 0.10 µm, an aspect ratio (major axis diameter/minor axis diameter) of from 2 to 20, a BET specific surface area of from 10 to 180 m 2 /g and a heat-resistance temperature of not less than 255°C.

摘要翻译： 适合用作颜料的黄铁氧化物氢氧化物颗粒包括在其表面上具有Fe和Al的复合氧化物氢氧化物的铁氧化物氢氧化物核颗粒，其中：（i）复合氧化物氢氧化物中的Al的量为0.1至 10重量％，以Al计，基于铁氧化物氢氧化物核心颗粒的重量计算; （ii）复合氧化物氢氧化物中的Fe的量以铁计，以铁氧化物氢氧化物核心颗粒的重量计为0.1〜50重量％ （iii）复合氧化物氢氧化物中Al与Fe的比例为0.05:1至2:1，以Al和Fe原子计算; 和（iv）所述黄铁氧化物氢氧化物颗粒的平均长轴直径为0.1至1.0μm，平均短轴直径为0.02至0.10μm，纵横比（长轴直径/短轴直径）为 2〜20，BET比表面积为10〜180m 2 / g，耐热温度为255℃以上。

公开(公告)号：EP0867407A2

公开(公告)日：1998-09-30

申请号：EP98302324.3

申请日：1998-03-26

申请人： TODA KOGYO CORP.

发明人： Hayashi, Kazuyuki ,  Iwasaki, Keisuke ,  Tanaka, Yasuyuki ,  Morii, Hiroko

IPC分类号： C01G49/06 ,  G11B5/704

CPC分类号： B82Y30/00 ,  C01G49/06 ,  C01P2004/10 ,  C01P2004/54 ,  C01P2004/62 ,  C01P2004/64 ,  C01P2004/84 ,  C01P2006/12 ,  C01P2006/22 ,  C01P2006/40 ,  C01P2006/42 ,  C01P2006/80 ,  G11B5/708 ,  G11B5/738 ,  Y10T428/24355 ,  Y10T428/257 ,  Y10T428/265 ,  Y10T428/2991

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 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 µm,
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 SO 4 .

Such high-density acicular hematite particles are 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.

摘要翻译： 高密度针状赤铁矿颗粒包括针状赤铁矿颗粒和在所述针状赤铁矿颗粒的至少一部分表面上包含锡的氧化物或锡和锑的氧化物的涂层; 平均主轴径不大于0.3μm，pH值不小于8，可溶性钠盐含量不超过300ppm，以Na计算，可溶性硫酸盐含量不超过150 ppm，以SO4计算。 这种高密度针状赤铁矿颗粒适用于使用以铁为主要成分的磁性颗粒的磁记录介质的非磁性底涂层的非磁性颗粒。

公开(公告)号：EP0945766A3

公开(公告)日：2000-02-23

申请号：EP99302317.5

申请日：1999-03-25

申请人： TODA KOGYO CORP.

发明人： Hayashi, Kazuyuki ,  Morii, Hiroko ,  Tanaka, Yasuyuki ,  Ishitani, Seiji

IPC分类号： G03G9/09 ,  G03G9/097 ,  G03G9/083

CPC分类号： G03G9/0838 ,  G03G9/0839 ,  G03G9/0902 ,  G03G9/0904

摘要： Black non-magnetic composite particles for a Black toner of the present invention comprising: (a) hematite and/or iron oxide hydroxide particles having an average particle diameter of from 0.055 to 0.95 µm; (b) a coating on the surface of said hematite and/or iron oxide hydroxide particles, comprising at least one organosilicon compound selected from:(1) organosilane compounds obtainable by drying or heat-treating alkoxysilane compounds,(2) polysiloxanes or modified polysiloxanes, and(3) fluoroalkyl organosilane compounds obtainable by drying or heat-treating fluoroalkylsilane compounds; and (c) carbon black fine particles adhered on said coating, which have a particle diameter of from 0.002 to 0.05 µm and which are present in an amount of from 1 to 25 parts by weight per 100 parts by weight of said hematite and/or iron oxide hydroxide particles.

公开(公告)号：EP0936507A3

公开(公告)日：1999-11-17

申请号：EP99301117.0

申请日：1999-02-16

申请人： TODA KOGYO CORP.

发明人： Hayashi, Kazuyuki ,  Morii, Hiroko ,  Tanaka, Yasuyuki ,  Ishitani, Seiji

IPC分类号： G03G9/083 ,  G03G9/09 ,  C01G49/00

CPC分类号： G03G9/08773 ,  G03G9/083 ,  G03G9/0833 ,  G03G9/0836 ,  G03G9/0839 ,  G03G9/0902 ,  G03G9/0904

摘要： Black magnetic composite particles for a black magnetic toner comprising:
(a) magnetic iron oxide particles having an average particle diameter of from 0.055 to 0.95 µm; (b) a coating on the surface of said magnetic iron oxide particles, comprising at least one organosilicon compound selected from:
(1) organosilane compounds obtainable by drying or heat-treating alkoxysilane compounds, (2) polysiloxanes or modified polysiloxanes, and (3) fluoroalkyl organosilane compounds obtainable by drying or heat-treating fluoroalkylsilane compounds; and (c) carbon black fine particles adhered on at least a part of said coating, which have a particle size of from 0.002 to 0.05 µm and which are present in an amount of from 1 to 25 parts by weight per 100 parts by weight of said magnetic iron oxide particles.

公开(公告)号：EP0863188A3

公开(公告)日：1999-09-15

申请号：EP98301626.2

申请日：1998-03-05

申请人： TODA KOGYO CORP.

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

IPC分类号： C09C3/08 ,  C09B67/00 ,  C09D7/12

CPC分类号： B82Y30/00 ,  C01P2004/03 ,  C01P2004/10 ,  C01P2004/20 ,  C01P2004/32 ,  C01P2004/38 ,  C01P2004/41 ,  C01P2004/54 ,  C01P2004/61 ,  C01P2004/62 ,  C01P2004/64 ,  C01P2004/86 ,  C01P2006/12 ,  C01P2006/60 ,  C01P2006/80 ,  C08K3/013 ,  C08K9/04 ,  C09B67/0008 ,  C09C3/006 ,  C09C3/08 ,  C09C3/10 ,  C09D7/41 ,  C09D7/62 ,  C09D7/68 ,  C09D7/69 ,  Y10T428/2991

摘要： A pigment for use in paints comprises:
a pigment particle as the core particle; a lower coat on at least part of the surface of said pigment particle, comprising squaric acid and/or a polyol having an anthraquinone skeleton represented by the general formula (I):
wherein m is 0 or an integer of 1 to 4, n is 0 or an integer of 1 to 4 and m+n is an integer of 2 to 4;
and an upper coat on at least part of the surface of said coated particle, comprising at least one alkylene glycol represented by the general formula (II):
        C q H 2q (OH) 2      (II) wherein q is an integer of 2 to 10.

公开(公告)号：EP0597694B1

公开(公告)日：1999-03-17

申请号：EP93308978.1

申请日：1993-11-10

申请人： TODA KOGYO CORP.

发明人： Hayashi, Kazuyuki ,  Ohsugi, Minoru ,  Morii, Hiroko ,  Sugita, Norio

IPC分类号： G11B5/712

CPC分类号： G11B5/712 ,  Y10T428/2993

公开(公告)号：EP0769775A1

公开(公告)日：1997-04-23

申请号：EP96307609.6

申请日：1996-10-18

申请人： TODA KOGYO CORP.

发明人： Hayashi, Kazuyuki ,  Iwasaki, Keisuke ,  Tanaka, Yasuyuki ,  Morii, Hiroko

IPC分类号： G11B5/704

CPC分类号： G11B5/738 ,  Y10S428/90 ,  Y10T428/256 ,  Y10T428/257 ,  Y10T428/265 ,  Y10T428/2982 ,  Y10T428/2991

摘要： High-density acicular hematite particles for a nonmagnetic undercoat layer for a magnetic recording medium have an average major axial diameter of not more than 0.3 µm, a major axial diameter distribution in geometrical standard of not more than 1.50 and a BET specific surface area of not less than 35 m 2 /g; show a pH of not less than 8; and contain not more than 300 ppm of soluble sodium salt, calculated as Na, and not more than 150 ppm of soluble sulfate, calculated as SO 4 .

摘要翻译： 用于磁记录介质的非磁性底涂层的高密度针状赤铁矿颗粒具有不大于0.3微米，在不超过1:50的BET比表面积的几何标准的一个主要的轴向直径分布平均主轴直径 不小于35米<2> /克; 示出了pH值不低于8; 和含有不超过300可溶性钠盐的ppm时，以Na计，并且不大于150 ppm的可溶性硫酸盐的，计算公式为SO4。

公开(公告)号：EP0950926A3

公开(公告)日：2000-02-23

申请号：EP99302984.2

申请日：1999-04-16

申请人： TODA KOGYO CORP.

发明人： Hayashi, Kazuyuki ,  Ishitani, Seiji ,  Tanaka, Yasuyuki ,  Morii, Hiroko

IPC分类号： G03G9/083 ,  G03G9/09

CPC分类号： G03G9/0839 ,  G03G9/0833 ,  Y10T428/2991 ,  Y10T428/2995

摘要： Black magnetic composite particles for black magnetic toner which have an average particle size of from 0.08 to 1.0 µm, comprising: (i) magnetite particles as core particles; (ii) fine particles on at least a part of the surface of each magnetite particle, comprising an oxide and/or an oxide hydroxide of at least one element selected from Si, Zr, Ti, Al and Ce; and (iii)a methyl hydrogen polysiloxane coating layer on said fine particles or on said fine particles and the exposed surface of the magnetite particles. Such black magnetic composite particles are suitable for a black magnetic toner which can exhibit not only an excellent flowability but also a high volume resistivity.