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    • 5. 发明申请
    • WATER-BASED INK FOR INKJET PRINTING
    • 喷墨打印机水性墨水
    • US20110257309A1
    • 2011-10-20
    • US13141038
    • 2009-12-17
    • Hiroyuki YoshidaTsuyoshi OdaTakahiro SatoYusuke ShimizuKoji KameiToshiya Iwasaki
    • Hiroyuki YoshidaTsuyoshi OdaTakahiro SatoYusuke ShimizuKoji KameiToshiya Iwasaki
    • C08K5/3417C08K5/23
    • C09D11/326C09B67/0097
    • The first invention relates to a water-based ink for ink-jet printing which includes colorant-containing polymer particles (A) obtained by dispersing a colorant with a water-soluble polymer (x) and a water-insoluble polymer (y), a water-soluble organic solvent (B) and water, wherein a weight ratio of the water-insoluble polymer (y) to the water-soluble polymer (x) [(y)/(x)] is from 2.0 to 5.0, and a content of the water-soluble organic solvent (B) in the ink is from 10 to 70% by weight. The water-based ink for ink-jet printing according to the first invention is excellent in ejection property and optical density and exhibits a low viscosity. The second invention relates to a process for producing a water dispersion for ink-jet printing, which includes a step (I) of mixing a dispersion of a colorant with an emulsion of a water-insoluble polymer containing an organic solvent; a step (II) of subjecting the resulting mixture to dispersing treatment to obtain a dispersion of the colorant onto which the water-insoluble polymer is deposited; and a step (III) of removing the organic solvent from the resulting dispersion. The water dispersion produced by the process of the second invention is capable of exhibiting a high optical density suitable for high-speed printing.
    • 第一发明涉及一种喷墨打印用水性油墨,其包括通过将着色剂与水溶性聚合物(x)和水不溶性聚合物(y)分散而得到的含有着色剂的聚合物粒子(A), 水溶性有机溶剂(B)和水,其中水不溶性聚合物(y)与水溶性聚合物(x)[(y)/(x)]的重量比为2.0〜5.0, 油墨中的水溶性有机溶剂(B)的含量为10〜70重量%。 根据第一发明的喷墨印刷用水性油墨的喷出性和光密度优异,粘度低。 第二发明涉及一种生产用于喷墨印刷的水分散体的方法,其包括将着色剂的分散体与含有机溶剂的水不溶性聚合物的乳液混合的步骤(I) 对所得混合物进行分散处理以获得其上沉积有不溶于水的聚合物的着色剂的分散体的步骤(II); 和从所得分散体中除去有机溶剂的步骤(III)。 通过第二发明的方法制备的水分散体能够表现出适于高速印刷的高光密度。
    • 6. 发明授权
    • Process for producing aqueous pigment dispersion
    • 生产水性颜料分散体的方法
    • US07964660B2
    • 2011-06-21
    • US12065779
    • 2006-09-05
    • Toshiyuki MatsumotoTsuyoshi OdaKoji KameiToshiya Iwasaki
    • Toshiyuki MatsumotoTsuyoshi OdaKoji KameiToshiya Iwasaki
    • C08K3/02
    • C09D17/001C09D11/322
    • The present invention relates to a process for producing a water-based pigment dispersion which includes a first step of mixing (A) an emulsion composition including a water-insoluble polymer having a specific weight-average molecular weight and containing a salt-forming group, an organic solvent having a specific solubility in water, a neutralizing agent and water, with (B) a pigment to obtain a preliminary dispersion having a content of non-volatile components of from 5 to 50% by weight and a weight ratio of the organic solvent to water [organic solvent/water] of from 0.1 to 0.9; a second step of continuously dispersing the preliminary dispersion by using a media-type dispersing device and continuously separating the resultant dispersion from media particles; and a third step of further dispersing the resultant dispersion by using a homogenizer, as well as a water-based ink for ink-jet printing containing the water-based pigment dispersion which not only satisfies a high optical density but also exhibits excellent gloss and rubbing resistance.
    • 水性颜料分散体的制造方法技术领域本发明涉及一种水性颜料分散体的制造方法,该方法包括:(A)包含具有特定重均分子量且含有成盐基团的水不溶性聚合物的乳液组合物的第一步骤, 在水中具有特定溶解度的有机溶剂,中和剂和水,(B)颜料,得到非挥发成分含量为5〜50重量%的预分散体和有机物的重量比 溶剂与水[有机溶剂/水]为0.1〜0.9; 通过使用介质型分散装置连续分散预分散液并将所得分散体与介质颗粒连续分离的第二步骤; 以及通过使用均化器进一步分散所得分散体的第三步骤,以及用于喷墨印刷的水性油墨,其含有水性颜料分散体,其不仅满足高的光密度,而且还表现出优异的光泽和摩擦 抵抗性。