An object of the present invention is to provide: a pigment dispersion liquid for inkjet ink, which is stable for a long period of storage at not only normal temperature but also high temperature and which increases repellency to ink ejection surface; and an active energy ray-curable inkjet ink composition containing the pigment dispersion liquid, which is less likely to cause clogging at the inkjet device. Disclosed is a pigment dispersion liquid for inkjet ink, comprising: a pigment; a pigment dispersing agent; and a compound having an ethylenically unsaturated double bond, wherein the pigment dispersing agent has an amine value of 20 mgKOH/g or less and an acid value of 10 mgKOH/g or less, and the pigment dispersing agent contains one or more components selected from the group consisting of: a copolymer having a styrene-derived repeating unit, a repeating unit derived from an unsaturated fatty acid having 12 or more carbon atoms, and a repeating unit derived from a polyalkylene oxide having an ethylenically unsaturated double bond; an alkali metal salt of the copolymer; an alkaline-earth metal salt of the copolymer; an ammonium salt of the copolymer; and an amine derivative of the copolymer.
本发明的目的是提供:一种用于喷墨墨
水的
颜料分散液,该
颜料分散液不仅在常温下,而且在高温下长期储存都很稳定,并能增加对墨
水喷射表面的排斥性;以及一种含有该
颜料分散液的活性能量射线固化喷墨墨
水组合物,该组合物不易在喷墨装置上造成堵塞。公开了一种用于喷墨墨
水的
颜料分散液,它包含:
颜料;
颜料分散剂;以及具有
乙烯不饱和双键的化合物,其中
颜料分散剂的胺值为 20 mgKOH/g 或更低,酸值为 10 mgKOH/g 或更低,
颜料分散剂包含一种或多种选自以下组别的成分:具有
苯乙烯衍生重复单元、具有 12 个或更多碳原子的不饱和
脂肪酸衍生重复单元和具有
乙烯不饱和双键的聚环氧烷衍生重复单元的共聚物;共聚物的碱
金属盐;共聚物的碱土
金属盐;共聚物的
铵盐;以及共聚物的胺衍
生物。