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2. 发明授权

US06451103B1 Self-dispersible aqueous pigment dispersion 有权
标题翻译：自分散性水性颜料分散体
公开(公告)号：US06451103B1
公开(公告)日：2002-09-17
申请号：US09667499
申请日：2000-09-22
申请人： Toshiyuki Uemura , Tsukasa Iguchi , Mikiya Kato , Akimitsu Mochizuki
发明人： Toshiyuki Uemura , Tsukasa Iguchi , Mikiya Kato , Akimitsu Mochizuki
IPC分类号： C09D1700
CPC分类号： C09D11/322 , C09B67/0034 , C09B67/0091 , C09D17/001
摘要： There is disclosed a self-dispersible aqueous pigment dispersion and preparing method thereof, the dispersion comprising an aqueous solution, particles of a pigment and a water-soluble pigment derivative, said particles being dispersed in the aqueous pigment dispersion in a concentration within the range from 2 to 25 wt. % based on the amount of the aqueous pigment dispersion, wherein a part of the water-soluble pigment derivative is adsorbed on the surface of the particles of the pigment to form dispersed particles comprising the particles of the pigment adsorbed by said part of the pigment derivative, and the remaining parts of the water-soluble pigment derivative are free in the dispersion without being adsorbed on the surface of the pigment in a concentration less than the critical flocculation concentration on which flocculation is initiated on said particles of the pigment dispersed under said concentration. The pigment dispersion has high dispersibility in an aqueous system and excellent dispersion stability over time, and is applicable to an inkjet recording liquid, which provides excellent light-resistance, water-resistance and hue of printed image, and simultaneously reveals excellent discharge stability at the nozzles of ink-jet printer.
摘要翻译：公开了一种自分散性水性颜料分散体及其制备方法，所述分散体含有水溶液，颜料颗粒和水溶性颜料衍生物，所述颗粒分散在水性颜料分散体中，浓度范围为 2〜25重量％基于水性颜料分散体的量，其中一部分水溶性颜料衍生物吸附在颜料颗粒的表面上以形成分散的颗粒，其包含由所述颜料衍生物的所述部分吸附的颜料颗粒，并且水溶性颜料衍生物的其余部分在不被吸附在颜料表面上的溶液中游离，其浓度小于在所述浓度下分散的颜料的所述颗粒上开始絮凝的临界絮凝浓度。颜料分散体在水性体系中的分散性高，分散稳定性随时间优异，适用于提供优异的耐光性，耐水性和印刷图像色调的喷墨记录液，同时也显示了在喷墨打印机喷嘴。

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