公开(公告)号：US5576133A

公开(公告)日：1996-11-19

申请号：US502182

申请日：1995-07-13

申请人： Yoshinobu Baba ,  Takeshi Ikeda ,  Yasuko Amano ,  Hitoshi Itabashi

发明人： Yoshinobu Baba ,  Takeshi Ikeda ,  Yasuko Amano ,  Hitoshi Itabashi

IPC分类号： G03G9/107

CPC分类号： G03G9/1075

摘要： A two component-type developer for electrophotography showing improved electrophotographic performances and also free from carrier adhesion (undesirable carrier transfer to the photosensitive member and recording materials) is constituted by using a magnetic carrier of 5-100 .mu.m in particle size. The carrier has a bulk density of at most 30 g/cm.sup.3, and magnetic properties including: a magnetization of 30-150 emu/cm.sup.3 under a magnetic field strength of 1000 oersted, a magnetization (residual magnetization .sigma..sub.r) of at least 25 emu/cm.sup.3 under a magnetic field strength of zero oersted, a coercive force of less than 300 oersted, and a relationship of:.vertline..sigma..sub.1000 -.sigma..sub.300 .vertline./.sigma..sub.1000 .ltoreq.0.40wherein .sigma..sub.1000 and .sigma..sub.300 denote magnetizations under magnetic field strength of 1000 oersted and 300 oersted, respectively.

摘要翻译： 通过使用粒径为5-100μm的磁性载体，构成了电子照相显示改善的电子照相性能并且不含载体粘附性（不希望的载体转移到感光构件和记录材料）的双组分型显影剂。 载体的体积密度至多为30g / cm 3，磁特性包括：在1000奥斯特的磁场强度下磁化强度为30-150emu / cm 3，磁化强度（剩余磁化σr）至少为25emu / cm3，磁场强度为零奥斯特，矫顽力小于300奥斯特，关系为：| 西格玛1000西格玛300 | /西格玛1000

公开(公告)号：US5439771A

公开(公告)日：1995-08-08

申请号：US103034

申请日：1993-07-28

申请人： Yoshinobu Baba ,  Yasuko Amano ,  Hitoshi Itabashi

发明人： Yoshinobu Baba ,  Yasuko Amano ,  Hitoshi Itabashi

IPC分类号： G03G9/10 ,  G03G9/107

CPC分类号： G03G9/10 ,  G03G9/1075

摘要： A two component-type developer for electrophotography showing improved electrophotographic performances and also free from carrier adhesion (undesirable carrier transfer to the photosensitive member and recording materials) is constituted by using a magnetic carrier comprising a soft magnetic material of 5-100 .mu.m in particle size. The carrier has a bulk density of at most 3.0 g/cm.sup.3, and magnetic properties including: a magnetization of 30-150 emu/cm.sup.3 under a magnetic field strength of 1000 oersted, and relationships (1) and (2):.vertline..sigma..sub.1000 -.sigma..sub.300 .vertline./.sigma..sub.1000 .ltoreq.0.40 (1)wherein .sigma..sub.1000 and .sigma..sub.300 denote magnetizations (emu/cm.sup.3) under magnetic field strengths of 1000 oersted (Oe) and 300 oersted (Oe), respectively, and0.15 (emu/cm.sup.3.Oe).ltoreq..vertline..sigma..sub.100 -.sigma..sub.r .vertline./100 (Oe) (2)wherein .sigma..sub.100 and .sigma..sub.r denote magnetizations (emu/cm.sup.3) under magnetic field strengths of 100 (Oe) and zero (Oe), respectively.

摘要翻译： 用于电子照相的双组分型显影剂通过使用包含5-100μm的软磁性材料的磁性载体构成，其显示改进的电子照相性能并且不含载体粘附（对感光构件和记录材料的不良载体转移） 尺寸。 载体的体积密度为3.0g / cm 3以下，磁特性包括：在1000奥斯特的磁场强度下磁化强度为30-150emu / cm3，以及（1）和（2）： sigma 1000-sigma 300 | / sigma 1000

公开(公告)号：US5494770A

公开(公告)日：1996-02-27

申请号：US451761

申请日：1995-05-26

申请人： Yoshinobu Baba ,  Yasuko Amano ,  Hitoshi Itabashi

发明人： Yoshinobu Baba ,  Yasuko Amano ,  Hitoshi Itabashi

IPC分类号： G03G9/10 ,  G03G9/107 ,  G03G13/09

CPC分类号： G03G9/10 ,  G03G9/1075

摘要： A two component-type developer for electrophotography showing improved electrophotographic performances and also free from carrier adhesion (undesirable carrier transfer to the photosensitive member and recording materials) is constituted by using a magnetic carrier comprising a soft magnetic material of 5-100 .mu.m in particle size. The carrier has a bulk density of at most 3.0 g/cm.sup.3, and magnetic properties including: a magnetization of 30-150 emu/cm.sup.3 under a magnetic field strength of 1000 oersted, and relationships (1) and (2):.vertline..sigma..sub.1000 -.sigma..sub.300 .vertline./.sigma..sub.1000 .ltoreq.0.40 (1)wherein .sigma..sub.1000 and .sigma..sub.300 denote magnetizations (emu/cm.sup.3) under magnetic field strengths of 1000 oersted (Oe) and 300 oersted (Oe), respectively, and0.15 (emu/cm.sup.3 .multidot.Oe).ltoreq..vertline..sigma..sub.100 -.sub.r .vertline./100 (Oe) (2),wherein .sigma..sub.100 and .sigma..sub.r denote magnetizations (emu/cm.sup.3) under magnetic field strengths of 100 (Oe) and zero (Oe), respectively.

摘要翻译： 用于电子照相的双组分型显影剂通过使用包含5-100μm的软磁性材料的磁性载体构成，其显示改进的电子照相性能并且不含载体粘附（对感光构件和记录材料的不良载体转移） 尺寸。 载体的体积密度为3.0g / cm 3以下，磁特性包括：在1000奥斯特的磁场强度下磁化强度为30-150emu / cm3，以及（1）和（2）： sigma 1000-sigma 300 | / sigma 1000

公开(公告)号：US5340677A

公开(公告)日：1994-08-23

申请号：US872979

申请日：1992-04-24

申请人： Yoshinobu Baba ,  Takeshi Ikeda ,  Tada Tatsuya ,  Yuko Sato ,  Yasuko Amano

发明人： Yoshinobu Baba ,  Takeshi Ikeda ,  Tada Tatsuya ,  Yuko Sato ,  Yasuko Amano

IPC分类号： G03G9/107 ,  G03G9/113 ,  G03G9/10

CPC分类号： G03G9/1138 ,  G03G9/1075 ,  G03G9/1133

摘要： A carrier for electrophotography comprises a carrier core material and a coating resin material with which the surface of the carrier core material is coated. The carrier core material has a binder resin and fine magnetic material particles dispersed in the binder resin. The coating resin material contains at least one of the following members:(a) a vinyl copolymer having a hydroxyl value of from 1 to 100 (KOHmg/g);(b) a styrene-acrylic copolymer having an acrylic component in a monomer percentage of from 30% by weight to 90% by weight, a weight average molecular weight (Mw) of from 30,000 to 70,000 and a weight average molecular weight/number average molecular weight (Mw/Mn) of from 2 to 10; and(c) an insulating resin and a quaternary ammonium salt represented by the following Formula (I): ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 may be the same of different and each represent an alkyl group, an aryl group or an aralkyl group; and A represents an organic anion or a polyacid ion.

摘要翻译： 用于电子照相的载体包括载体芯材料和涂覆树脂材料，载体芯材料的表面被涂覆在树脂材料上。 载体芯材料具有分散在粘合剂树脂中的粘合剂树脂和细小的磁性材料颗粒。 涂料树脂材料含有以下成分中的至少一种：（a）羟值为1〜100（KOHmg / g）的乙烯基共聚物; （b）苯乙烯 - 丙烯酸共聚物，其单体百分比为30重量％至90重量％的丙烯酸组分，重均分子量（Mw）为30,000至70,000，重均分子量/数均分子量 分子量（Mw / Mn）为2〜10; 和（c）由下式（I）表示的绝缘树脂和季铵盐：其中R 1，R 2，R 3和R 4可以相同，各自表示烷基，芳基 基团或芳烷基; A表示有机阴离子或多酸离子。

公开(公告)号：US6165663A

公开(公告)日：2000-12-26

申请号：US422105

申请日：1999-10-20

申请人： Yoshinobu Baba ,  Takeshi Ikeda ,  Yuko Sato ,  Hitoshi Itabashi ,  Yuzo Tokunaga

发明人： Yoshinobu Baba ,  Takeshi Ikeda ,  Yuko Sato ,  Hitoshi Itabashi ,  Yuzo Tokunaga

IPC分类号： G03G9/08 ,  G03G9/10 ,  G03G9/107 ,  G03G9/113 ,  G03G13/09

CPC分类号： G03G9/0827 ,  G03G9/0821 ,  G03G9/10 ,  G03G9/107 ,  G03G9/1132 ,  G03G9/1136

摘要： A magnetic coated carrier suitable for constituting a two-component type developer for use in electrophotography is composed of magnetic coated carrier particles comprising magnetic coated carrier particles comprising magnetic carrier core particles each comprising a binder resin and metal oxide particles, and a coating layer surface-coating each carrier core particle. The metal oxide particles have been subjected to a surface lipophilicity-imparting treatment. The magnetic carrier core particles have a resistivity of at least 1.times.10.sup.10 ohm.cm, and the magnetic coated carrier has a resistivity of at least 1.times.10.sup.12 ohm.cm. The magnetic coated carrier has a particle size distribution such that (i) it has a number-average particle size Dn of 5-100 .mu.m, (ii) it satisfies a relationship of Dn/.sigma..gtoreq.3.5, wherein .sigma. denotes a standard deviation of number-basis particle size distribution of the carrier, and (iii) it contains at most 25% by number of particles having particle sizes of at most Dn.times.2/3.

摘要翻译： 适用于构成用于电子照相术的双组分型显影剂的磁性涂层载体由包括磁性涂覆载体颗粒的磁性涂覆载体颗粒组成，所述磁性涂覆载体颗粒包括各自包含粘合剂树脂和金属氧化物颗粒的磁性载体芯颗粒，以及涂层表面 - 涂覆每个载体芯颗粒。 金属氧化物颗粒已进行表面亲油性赋予处理。 磁性载体芯颗粒具有至少1×10 10欧姆·厘米的电阻率，并且磁性涂覆载体的电阻率至少为1×10 12欧姆·厘米。 磁性涂层载体具有如下的粒度分布：（i）其数均粒径Dn为5-100μm，（ii）满足Dn / sigma = 3.5的关系，其中σ表示 载体的基于数量的粒度分布的标准偏差，和（iii）其含有至多25％数量的粒径至多Dnx + E，fra 2/3 + EE的颗粒。

公开(公告)号：US06566028B2

公开(公告)日：2003-05-20

申请号：US09819067

申请日：2001-07-16

申请人： Yayoi Tazawa ,  Takeshi Ikeda ,  Yoshinobu Baba ,  Hitoshi Itabashi ,  Yuzo Tokunaga ,  Yasukazu Ayaki

发明人： Yayoi Tazawa ,  Takeshi Ikeda ,  Yoshinobu Baba ,  Hitoshi Itabashi ,  Yuzo Tokunaga ,  Yasukazu Ayaki

IPC分类号： G03G500

CPC分类号： G03G9/0825 ,  G03G9/08773 ,  G03G9/097 ,  G03G9/09775

摘要： A toner is comprised of toner particles composed of at least a binder resin and a clorant, wherein the toner particles each have a coating layer formed on their surfaces in a state of particulate matters being stuck to one another. The particulate matters contains at least a silicon compound.

公开(公告)号：US5766814A

公开(公告)日：1998-06-16

申请号：US826678

申请日：1997-04-07

申请人： Yoshinobu Baba ,  Takeshi Ikeda ,  Yuko Sato ,  Hitoshi Itabashi ,  Yuzo Tokunaga

发明人： Yoshinobu Baba ,  Takeshi Ikeda ,  Yuko Sato ,  Hitoshi Itabashi ,  Yuzo Tokunaga

IPC分类号： G03G9/10 ,  G03G9/107 ,  G03G9/113

CPC分类号： G03G9/1136 ,  G03G9/10 ,  G03G9/107

摘要： A magnetic coated carrier suitable for constituting a two-component type developer for use in electrophotography is composed of magnetic coated carrier particles comprising magnetic carrier core particles and a resinous surface coated layer coating the magnetic carrier core particles. The carrier is suitably constituted so as to satisfy the condition of: (a) the magnetic carrier core particles has a resistivity of at least 1.times.10.sup.10 ohm.cm, and the magnetic coated carrier has a resistivity of at least 1.times.10.sup.12 ohm.cm, (b) the magnetic coated carrier has a number-average particle size of 1-100 .mu.m and has such a particle size distribution that particles having particle sizes of at most a half of the number-average particle size occupy an accumulative percentage of at most 20% by number, (c) the magnetic coated carrier has a shape factor SF-1 of 100-130, (d) the magnetic coated carrier has a magnetization at 1 kilo-oersted of 40-250 emu/cm.sup.3, and (e) the resinous surface coating layer comprises a coating resin composition which in turn comprises a straight silicone resin and a coupling agent. The straight silicone resin includes trifunctional silicon and difunctional silicon in an atomic ratio of 100:0-40:60.

摘要翻译： 适用于构成用于电子照相术的双组分型显影剂的磁性涂层载体由包括磁性载体芯颗粒的磁性涂覆载体颗粒和涂覆磁性载体芯颗粒的树脂表面涂层组成。 载体适当地构成为满足以下条件：（a）磁性载体芯颗粒具有至少1×10 10欧姆·厘米的电阻率，并且磁性涂覆载体的电阻率至少为1×10 12欧姆·厘米，（b ）磁性涂布载体的数均粒径为1-100μm，并且具有这样的粒度分布，使得粒径至多为数均粒径的一半的颗粒占累积百分比至多为20 （c）磁性涂层载体的形状因子SF-1为100-130，（d）磁性涂层载体的磁化强度为1千奥斯特值为40-250emu / cm3，（e） 树脂表面涂层包括涂层树脂组合物，其又包含直的有机硅树脂和偶联剂。 直的有机硅树脂包括原子比为100:0-40:60的三官能硅和二官能硅。

公开(公告)号：US5744278A

公开(公告)日：1998-04-28

申请号：US835878

申请日：1997-04-08

申请人： Yasukazu Ayaki ,  Takeshi Ikeda ,  Tetsuro Fukui ,  Yoshinobu Baba ,  Hitoshi Itabashi ,  Yayoi Nagao

发明人： Yasukazu Ayaki ,  Takeshi Ikeda ,  Tetsuro Fukui ,  Yoshinobu Baba ,  Hitoshi Itabashi ,  Yayoi Nagao

IPC分类号： G03G9/08 ,  G03G9/087 ,  G03G9/093

CPC分类号： G03G9/08797 ,  G03G9/0819 ,  G03G9/0825 ,  G03G9/093 ,  G03G9/09392

摘要： A toner for electrophotography contains at least a colorant and a binder resin, and (i) contains 0.1 to 15 parts by weight of colorant per 100 parts by weight of binder resin, (ii) has a number average particle size of 0.5 to 6.0 .mu.m, (iii) has a coefficient of variation of 20% or less based on a number distribution, and (iv) has a capsule structure containing a shell layer and a core. The toner has solvent-mixture-soluble resin components extracted with a solvent mixture of ethanol and methyl ethyl ketone wherein the maximum glass transition temperature (Tg1) of a first soluble resin component obtained by extracting until 10% by weight of the total weight of the solvent-mixture-soluble resin components, and the maximum glass transition temperature (Tg2) of a second soluble resin component of the remainder satisfy the following relations: Tg1>Tg2 and Tg1.gtoreq.50.degree. C.

摘要翻译： 电子照相用调色剂至少含有着色剂和粘合剂树脂，（i）每100重量份粘合剂树脂含有0.1〜15重量份的着色剂，（ii）数均粒径为0.5〜6.0μm m，（iii）基于数量分布具有20％以下的变异系数，（iv）具有包含壳层和芯的胶囊结构。 调色剂具有用乙醇和甲基乙基酮的溶剂混合物萃取的溶剂混合物可溶性树脂组分，其中通过萃取获得的第一可溶性树脂组分的最大玻璃化转变温度（Tg1）至总重量的10重量％ 溶剂混合物溶解性树脂成分，其余的第二可溶性树脂成分的最高玻璃化转变温度（Tg2）满足以下关系：Tg1> Tg2，Tg1> = 50℃

公开(公告)号：US06358658B1

公开(公告)日：2002-03-19

申请号：US09443133

申请日：1999-11-18

申请人： Yayoi Tazawa ,  Takeshi Ikeda ,  Yoshinobu Baba ,  Hitoshi Itabashi ,  Yuzo Tokunaga ,  Yasukazu Ayaki

发明人： Yayoi Tazawa ,  Takeshi Ikeda ,  Yoshinobu Baba ,  Hitoshi Itabashi ,  Yuzo Tokunaga ,  Yasukazu Ayaki

IPC分类号： G03G900

CPC分类号： G03G9/0825 ,  G03G9/08773 ,  G03G9/097 ,  G03G9/09775

摘要： A toner is comprised of toner particles composed of at least a binder resin and a clorant, wherein the toner particles each have a coating layer formed on their surfaces in a state of particulate matters being stuck to one another. The particulate matters contains at least a silicon compound.

公开(公告)号：US5985502A

公开(公告)日：1999-11-16

申请号：US994030

申请日：1997-12-18

申请人： Yasukazu Ayaki ,  Takeshi Ikeda ,  Tetsuro Fukui ,  Yoshinobu Baba ,  Hitoshi Itabashi

发明人： Yasukazu Ayaki ,  Takeshi Ikeda ,  Tetsuro Fukui ,  Yoshinobu Baba ,  Hitoshi Itabashi

IPC分类号： G03G9/08 ,  G03G9/087

CPC分类号： G03G9/0806 ,  G03G9/0819 ,  G03G9/0821 ,  G03G9/08795

摘要： A toner has at least 100 parts by weight of binder resin and 0.1 to 15 parts by weight of colorant. The toner has a number average particle size (Dn) of 0.5 to 6.0 .mu.m, a particle size distribution coefficient (volume average particle size (Dv) / number average particle size (Dn)) of 1.0 to 1.3 and a variation coefficient of particle number distribution of 20% or less.The toner contains 0.1 to 5.0% by weight of methanol-soluble resin component extracted by the first Soxhlet extraction with methanol and 50 to 99% by weight of THF-soluble resin component extracted by a second Soxhlet extraction with tetrahydrofuran (THF) after the Soxhlet extraction with methanol, wherein the maximum glass transition point (Tg.sub.2) of the methanol-soluble resin component and the glass transition point (Tg.sub.1) of the THF-soluble resin component satisfies the following relation;0 (.degree. C.)

摘要翻译： 调色剂具有至少100重量份的粘合剂树脂和0.1至15重量份的着色剂。 调色剂的数均粒径（Dn）为0.5〜6.0μm，粒径分布系数（体积平均粒径（Dv）/数均粒径（Dn））为1.0〜1.3，粒子的变异系数 数量分布在20％以下。 调色剂含有0.1至5.0重量％的甲醇可溶性树脂组分，通过第一次索格利特甲醇萃取提取甲醇溶解树脂组分，以及50至99重量％的THF可溶性树脂组分，经索氏提取后通过第四次索格利特萃取 用甲醇萃取，其中甲醇可溶性树脂组分的最大玻璃化转变温度（Tg2）和THF可溶性树脂组分的玻璃化转变温度（Tg1）满足以下关系： 0（℃）