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公开(公告)号：US5716746A
公开(公告)日：1998-02-10
申请号：US247453
申请日：1994-05-23
申请人： Yushi Mikuriya , Toshiaki Nakahara , Masayoshi Shimamura , Kuniko Kobayashi , Kazuyoshi Hagiwara , Masami Fujimoto
发明人： Yushi Mikuriya , Toshiaki Nakahara , Masayoshi Shimamura , Kuniko Kobayashi , Kazuyoshi Hagiwara , Masami Fujimoto
CPC分类号： G03G9/09716 , G03G9/08704 , G03G9/08706 , G03G9/08708 , G03G9/08711 , G03G9/08728
摘要： A magnetic toner which is excellent in the low temperature fixability and the anti-offset properties is disclosed. The binder resin of the toner comprises a non-crosslinked styrene polymer, a non-crosslinked styrene copolymer or a mixture of these, and a polyolefin, wherein; the binder resin has, in its molecular weight distribution pattern measured by gel permeation chromatography (GPC), at least one maximal point (peak) in each region of a low molecular weight of from 5,000 to 20,000 and of a high molecular weight of from 200,00 to 1,000,000, where a height H1 of a maximum peak in the low molecular weight region, a height H3 of a maximum peak in the high molecular weight region and a height H2 of a minimal point between both of said peaks satisfy the relationship H1:H2:H3 of 3-25:1:1.5-12; and has a weight average molecular weight Mw and a number average molecular weight Mn in a value Mw/Mn of from 15 to 80.
摘要翻译： 公开了低温定影性和抗偏移性优异的磁性调色剂。 调色剂的粘合剂树脂包括非交联苯乙烯聚合物，非交联苯乙烯共聚物或它们的混合物和聚烯烃，其中： 粘合剂树脂在其通过凝胶渗透色谱法（GPC）测量的分子量分布图中具有低分子量为5,000〜20,000，高分子量为200的各区域中的至少一个最大点（峰） 00至1,000,000，其中低分子量区域中的最大峰的高度H1，高分子量区域中的最大峰的高度H3和两个峰之间的最小点的高度H2满足关系H1 ：H2：H3为3-25：1：1.5-12; 并且具有15至80的Mw / Mn值的重均分子量Mw和数均分子量Mn。
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公开(公告)号：US5354637A
公开(公告)日：1994-10-11
申请号：US897849
申请日：1992-06-12
申请人： Masayoshi Shimamura , Toshiaki Nakahara , Kuniko Kobayashi , Kazuyoshi Hagiwara , Yushi Mikuriya , Masami Fujimoto
发明人： Masayoshi Shimamura , Toshiaki Nakahara , Kuniko Kobayashi , Kazuyoshi Hagiwara , Yushi Mikuriya , Masami Fujimoto
CPC分类号： C01G49/02 , G03G9/0833 , G03G9/0836 , C01P2002/32 , C01P2002/72 , C01P2004/50 , C01P2004/62 , C01P2006/12 , Y10S430/104
摘要： A magnetic toner is constituted by at least a binder resin and a magnetic iron oxide. The magnetic iron oxide is characterized by having an Fe(II) content of 18.5-24.1 wt. %, and shows a BET specific surface area of S (m.sup.2 /g) and an X-ray diffraction pattern giving a half-value width W (deg.) of a diffraction peak corresponding to 311 plane of the magnetic iron oxide in spinel structure, the values S and W satisfying: 4.5.times.10.sup.-3 S+0.130.ltoreq.W.ltoreq.4.5.times.10.sup.-3 S+0.160, and 4.5.ltoreq.S.ltoreq.11.0. Alternatively, the magnetic iron oxide is characterized by having a number-average particle size D satisfying a relationship with W of: -0.08D+0.180.ltoreq.W.ltoreq.-0.08D+0.212, and 0.10.ltoreq.D.ltoreq.0.45. The relationship between W and S or D indicates a good crystallinity of the magnetic iron oxide which provides the magnetic toner with a stable performance for a long period of time. The magnetic iron oxide can be obtained through a heating treatment at a temperature of 130.degree.-360.degree. C. within a gaseous mixture of hydrogen and nitrogen containing 50 vol. % or less of hydrogen or at a temperature of 150.degree. -450.degree. C. in an inert gas.
摘要翻译： 磁性调色剂由至少粘合剂树脂和磁性氧化铁构成。 磁性氧化铁的特征在于Fe（II）含量为18.5-24.1重量％。 ％，并且显示S（m 2 / g）的BET比表面积和给出与尖晶石结构中的磁性氧化铁的311平面对应的衍射峰的半值宽度W（度）的X射线衍射图 ，值S和W满足：4.5×10-3S + 0.130×W = 4.5×10-3S + 0.160，4.5≤S≤11.0。 或者，磁性氧化铁的特征在于具有满足与W的关系的数均粒径D：-0.08D + 0.180
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3.发明授权Positively chargeable magnetic toner, image forming process image forming apparatus, apparatus unit and facsimile apparatus 失效可充电磁性调色剂，图像形成处理图像形成装置，装置单元和传真装置
公开(公告)号：US5213933A
公开(公告)日：1993-05-25
申请号：US706184
申请日：1991-05-28
CPC分类号： G03G9/08726 , G03G9/08711 , G03G9/08737 , G03G9/0912 , G03G9/0914 , G03G9/09716 , G03G9/09741
摘要： A positively chargeable magnetic toner comprises positively chargeable magnetic toner particles having at least a binder resin, a magnetic substance and a charge controlling agent; wherein the binder resin contains (A) a vinyl polymer having carboxyl groups, acid anhydride groups, partial esters thereof or mixtures of the groups and having and an acid value of 5 to 30, and (B) a copolymer obtained by polymerizing at least a diolefin monomer and a vinyl monomer; and wherein the charge controlling agent contains (C) a quaternary ammonium salt and (D) a nigrosine dye or a triphenylmethane dye, the ratio by weight among the components (A), (B), (C) and (D) being within the range of (A):(B):(C):(D)=80 to 30:70 to 20:2.0 to 0.5: 2.0 to 0.1 relative to 100 parts of the total weight of the components (A) and (B). The present invention also provides an image forming process, an image forming apparatus and a facsimile apparatus, all of which use the positively chargeable magnetic toner.
摘要翻译： 可带正电的磁性调色剂包括具有至少粘合剂树脂，磁性物质和电荷控制剂的可带电荷的磁性调色剂颗粒; 其中所述粘合剂树脂含有（A）具有羧基的乙烯基聚合物，酸酐基，其偏酯或基团的混合物，其酸值为5〜30，和（B）通过使至少 二烯单体和乙烯基单体; 并且其中电荷控制剂含有（C）季铵盐和（D）苯胺黑染料或三苯甲烷染料，组分（A），（B），（C）和（D）中的重量比在 （A）：（B）：（C）:( D）= 80〜30:70〜20:2.0〜0.5:2.0〜0.1的范围，相对于成分（A）和（A） B）。 本发明还提供一种图像形成处理，图像形成装置和传真装置，所有这些都使用可带正电的磁性调色剂。
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公开(公告)号：US5175070A
公开(公告)日：1992-12-29
申请号：US588436
申请日：1990-09-26
CPC分类号： G03G13/09 , G03G15/0907 , G03G9/0819
摘要： An image forming apparatus is formed by providing a latent image-bearing member for holding an electrostatic image thereon and a toner-carrying member for carrying a prescribed magnetic toner comprising a binder resin and magnetic powder and having a particle size distribution including 12% by number or more of magnetic toner particles of 5 microns or smaller, 33% by number or less of magnetic toner particles of 8-12.7 microns and 2% by volume or less of magnetic toner parcitles of 16 microns or larger so as to provide a volume-average particle size of 4-10 microns. At the developing station, an alternating bias voltage comprising a DC voltage and an unsymmetrical AC voltage in superposition is applied between the toner-carrying member and the latent image-bearing member to provide an alternating bias electric field comprising a development-side voltage component and a reverse-development side voltage component. The development-side voltage component has a magnitude equal to or larger than that of the reverse development-side voltage component and a duration smaller than that of the reverse-development side voltage component, so that the magnetic toner on the toner-carrying member, particularly fine powdery fraction thereof effective for high-quality development, is effectively transferred to the latent image-bearing member to develop the electrostatic image thereon at the developing station.
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公开(公告)号：US4804610A
公开(公告)日：1989-02-14
申请号：US048928
申请日：1987-05-13
CPC分类号： C08F2/44 , G03G9/0806
摘要： A process for preparing a toner obtained by a suspension polymerization method comprises stirring a mixture containing at least a polymerizable monomer containing 5 to 500 ppm of a polymerization inhibitor dissolved in the polymerizable monomer and a colorant; preparing a polymerizable monomer composition by adding a polymerization initiator to said mixture; stirring the prepared polymerizable monomer composition; and carrying out suspension polymerization of the polymerizable monomer composition dispersed in an aqueous medium.
摘要翻译： 制备通过悬浮聚合法获得的调色剂的方法包括搅拌至少含有溶解在可聚合单体中的聚合抑制剂5至500ppm的可聚合单体和着色剂的混合物; 通过向所述混合物中加入聚合引发剂制备可聚合单体组合物; 搅拌制备的可聚合单体组合物; 并进行分散在水性介质中的聚合性单体组合物的悬浮聚合。
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公开(公告)号：US4912010A
公开(公告)日：1990-03-27
申请号：US373699
申请日：1989-06-30
CPC分类号： G03G9/0806 , G03G9/0812 , G03G9/0819
摘要： A process for producing a toner comprising:heating a monomer composition containing at least a polymerizable monomer and a release agent to a temperature not lower than the melting point or the softening point of said release agent todissolve the release agent in the polymerizable monomer and therebypreparing a monomer composition in which the release agent is dissolved;cooling the monomer composition to a temperature lower than the melting point or the softening point of the release agent to precipitate said release agent and therebypreparing a monomer composition containing the precipitated releasing agent particles having a number average size of 0.5 to 5 .mu.m;granulating in an aqueous dispersion medium the monomer composition to prepare a particle;carrying out suspension polymerization of the particle of the monomer composition at a temperature lower than the melting point or the softening point of the release agent.
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公开(公告)号：US5202731A
公开(公告)日：1993-04-13
申请号：US935431
申请日：1992-08-26
CPC分类号： G03G9/0819 , G03G13/09 , G03G15/0907
摘要： An image forming apparatus is formed by providing a latent image-bearing member for holding an electrostatic image thereon and a toner-carrying member for carrying a prescribed magnetic toner comprising a binder resin and magnetic powder and having a particle size distribution including 12% by number or more of magnetic toner particles of 5 microns or smaller, 33% by number or less of magnetic toner particles of 8-12.7 microns and 2% by volume or less of magnetic toner particles of 16 microns or larger so as to provide a volume-average particle size of 4-10 microns. At the developing station, an alternating bias voltage comprising a DC voltage and an unsymmetrical AC voltage in superposition is applied between the toner-carrying member and the latent image-bearing member to provide an alternating bias electric field comprising a development-side voltage component and a reverse-development side voltage component. The development-side voltage component has a magnitude equal to or larger than that of the reverse development-side voltage component and a duration smaller than that of the reverse-development side voltage component, so that the magnetic toner on the toner-carrying member, particularly fine powdery fraction thereof effective for high-quality development, is effectively transferred to the latent image-bearing member to develop the electrostatic image thereon at the developing station.
摘要翻译： 通过在其上提供用于保持静电图像的潜像承载部件和用于承载包含粘合剂树脂和磁粉的规定的磁性调色剂的调色剂承载部件形成图像形成装置，其粒度分布包括12数量级 或更多的8微米或更小的磁性调色剂颗粒，8-12.7微米的磁性调色剂颗粒的数量少于33％，以及16微米或更大的磁性调色剂颗粒的2体积％以下的磁性调色剂颗粒， 平均粒径为4-10微米。 在显影站，在调色剂承载构件和潜像承载构件之间施加包括直流电压和不对称交流电压的交替偏置电压，以提供包括显影侧电压分量的交流偏置电场和 反向显影侧电压分量。 显影侧电压分量的幅度等于或大于反显影侧电压分量的幅度，并且持续时间小于反向显影侧电压分量的幅度，使得调色剂承载元件上的磁性调色剂， 特别是对于高质量显影有效的细粉末级分有效地转移到潜像承载部件，以在显影站上显影静电图像。
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公开(公告)号：US4816366A
公开(公告)日：1989-03-28
申请号：US155436
申请日：1988-02-12
申请人： Yoshihiko Hyosu , Takeshi Ikeda , Hitoshi Kanda , Hiromi Mori , Hiroaki Kawakami , Kuniko Kobayashi
发明人： Yoshihiko Hyosu , Takeshi Ikeda , Hitoshi Kanda , Hiromi Mori , Hiroaki Kawakami , Kuniko Kobayashi
CPC分类号： G03G9/0806 , G03G9/0815 , G03G9/08702
摘要： A toner for developing electrostatic latent images is produced by a process comprising the steps of: (a) stirring at least water, hardly water-soluble inorganic fine powder and a specific compound thereby to prepare an aqueous dispersion medium; (b) adding a polymerizable monomer composition comprising at least a polymerizable monomer and a polymerization initiator to the aqueous dispersion medium; (c) forming particles of the polymerizable monomer composition in the aquoeus dispersion medium; (d) subjecting the particles of the polymerizable monomer composition to suspension polymerization, thereby to produce toner particles; and (e) removing the hardly water-soluble inorganic fine powder attached to the surfaces of the toner particles by an aqueous alkaline or acidic solution.
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