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1. 发明授权

US6017670A Electrophotographic toner and process for the preparation thereof 失效
标题翻译：电子照相调色剂及其制备方法
公开(公告)号：US6017670A
公开(公告)日：2000-01-25
申请号：US90333
申请日：1998-06-04
申请人： Toyomi Hashizume , Shoji Okuno , Yukiko Soma , Hitoshi Takayanagi , Minoru Nomura , Takashi Ito , Hiroyuki Ohminato
发明人： Toyomi Hashizume , Shoji Okuno , Yukiko Soma , Hitoshi Takayanagi , Minoru Nomura , Takashi Ito , Hiroyuki Ohminato
IPC分类号： G03G9/08 , G03G9/087 , G03G9/097
CPC分类号： G03G9/0821 , G03G9/0819 , G03G9/08711 , G03G9/09716
摘要： An electrophotographic toner having a volume-average particle diameter of from 3 to 15 .mu.m. The toner comprises a spherical particulate material having an average circularity of not less than 0.97 having a colorant encapsulated in a binder resin. The binder resin is a styrene-acrylic resin having an acid value of from 30 to 150 which is at least partly crosslinked. The tetrahydrofuran insoluble content in the whole of the binder resin including crosslinkd portions in the particulate material is from 0.5 to 70% by weight.
摘要翻译：体积平均粒径为3〜15μm的电子照相调色剂。调色剂包含平均圆形度不小于0.97的球形颗粒材料，其具有包封在粘合剂树脂中的着色剂。粘合剂树脂是至少部分交联的酸值为30至150的苯乙烯 - 丙烯酸树脂。包括颗粒材料中的交联部分的整个粘结剂树脂中的四氢呋喃不溶物含量为0.5至70重量％。

2. 发明授权

US06248491B1 Toner for electrostatic image development 有权
标题翻译：调色剂用于静电图像显影
公开(公告)号：US06248491B1
公开(公告)日：2001-06-19
申请号：US09666555
申请日：2000-09-21
申请人： Hitoshi Takayanagi , Minoru Nomura , Takashi Ito , Kenichi Hirabayashi , Yukiko Soma , Toshiro Kogawara , Toyomi Hashizume , Kazuo Itoya
发明人： Hitoshi Takayanagi , Minoru Nomura , Takashi Ito , Kenichi Hirabayashi , Yukiko Soma , Toshiro Kogawara , Toyomi Hashizume , Kazuo Itoya
IPC分类号： G03G9087
CPC分类号： G03G9/0827 , G03G9/08755 , G03G9/08795
摘要： The present invention provides a polyester resin toner which has good fixing properties and is superior in image quality in a heat roller fixation system without employing an anti-offset solution, and which has a spherical or generally spherical shape and has a small particle diameter, and a method of producing the same. In a toner for electrostatic image development comprising a binder resin and a colorant, said binder resin is made of a polyester resin. Furthermore, the weight-average molecular weight as measured by gel permeation chromatography of a tetrahydrofuran-soluble fraction of said polyester resin contained in the toner is 30,000 or more and the weight-average molecular weight/number-average molecular weight is 12 or more and, moreover, the area ratio of a molecular weight of 600,000 or more is 0.5% or more and the area ratio of a molecular weight of 10,000 or less is within a range of 20-80%. The toner for electrostatic image development has a spherical or generally spherical shape having the average circularity (average value of circularity defined by (perimeter of a circle having the same area as that of a projected area of particles)/(perimeter of a projected image of particles)) of 0.97 or more.
摘要翻译：本发明提供一种聚酯树脂调色剂，其具有良好的定影性能，并且在不使用防偏移溶液的热辊定影系统中具有优异的图像质量，并且具有球形或大致球形并且具有小的粒径，以及其制造方法。在包含粘合剂树脂和着色剂的用于静电图像显影的调色剂中，所述粘合剂树脂由聚酯树脂制成。此外，通过凝胶渗透色谱法测定调色剂中所含的所述聚酯树脂的四氢呋喃可溶部分的重均分子量为30,000以上，重均分子量/数均分子量为12以上，此外，分子量为600,000以上的面积比为0.5％以上，分子量为10,000以下的面积比在20〜80％的范围内。用于静电图像显影的调色剂具有平均圆形度的球形或大致球形形状（由圆周的平均值（具有与颗粒的投影面积相同的面积的圆的周长）/（投影图像的周长）颗粒））为0.97以上。

3. 发明授权

US5885743A Electrophotographic toner and process for the preparation thereof 失效
标题翻译：电子照相调色剂及其制备方法
公开(公告)号：US5885743A
公开(公告)日：1999-03-23
申请号：US979786
申请日：1997-11-26
申请人： Hitoshi Takayanagi , Hiroko Sakurai , Kazuo Itoya , Kinji Shinzo , Yukiko Soma , Kenichi Hirabayashi , Koichiro Matsuki , Minoru Nomura , Takashi Ito , Hiroyuki Ohminato
发明人： Hitoshi Takayanagi , Hiroko Sakurai , Kazuo Itoya , Kinji Shinzo , Yukiko Soma , Kenichi Hirabayashi , Koichiro Matsuki , Minoru Nomura , Takashi Ito , Hiroyuki Ohminato
IPC分类号： G03G9/08 , G03G9/087 , G03G9/097 , G03G9/093
CPC分类号： G03G9/08711 , G03G9/0819 , G03G9/0821 , G03G9/09716
摘要： Disclosed are an electrophotographic toner which is a spherical particle comprising a binder resin having encapsulated therein a colorant and has a volume average particle size of from 3 to 12 .mu.m, the binder resin being a non-crosslinked styrene-acrylic resin having an acid value of from 30 to 120, containing from 5 to 60% by weight of the components having a molecular weight in terms of polystyrene by gel permeation chromatography of 200,000 or more and having a ratio (Mw/Mn) of the weight-average molecular weight Mw to the number-average molecular weight Mn of from 4 to 30; and a process for preparing an electrophotographic toner comprising spherical particles having a volume average grain size of from 3 to 12 .mu.m, the process comprising mixing a mixture comprising the above-described resin, a colorant, a wax and an organic solvent as essential components with an aqueous medium in the presence of a neutralizer in an amount sufficiently large to render the resin self-emulsifiable to effect phase inversion emulsification, thereby producing particles each comprising a binder resin having encapsulated therein a colorant and a wax in the liquid medium, and separating and drying the particles. The toner obtained by the present invention is improved in the thermal fixing characteristics and the environmental stability of charging, exhibits a wide fixing temperature width at the heated roll fixing and has excellent triboelectricity.
摘要翻译：公开了一种电子照相调色剂，其为包含粘合剂树脂的球形颗粒，其中包含着色剂，其体积平均粒度为3至12μm，粘合剂树脂为具有酸值的非交联苯乙烯 - 丙烯酸树脂为30〜120，含有5〜60重量％的通过凝胶渗透色谱法测定的聚苯乙烯换算成分的成分为20万以上，重均分子量Mw（Mw / Mn）数均分子量Mn为4〜30; 以及一种制备电荷调色剂的方法，该电子照相调色剂包含体积平均粒度为3至12μm的球形颗粒，该方法包括将包含上述树脂，着色剂，蜡和有机溶剂的混合物作为必要组分在中和剂存在下的水性介质，其量足够大以使树脂自乳化以实现相转化乳化，从而产生各自包含在其中包含着色剂和蜡在液体介质中的粘合剂树脂的颗粒，以及分离和干燥颗粒。通过本发明获得的调色剂在热定影特性和充电的环境稳定性方面得到改善，在加热辊定影时具有宽的定影温度宽度，并且具有优异的摩擦电性。

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