申请人:Yatake Masahiro
公开号:US20060058420A1
公开(公告)日:2006-03-16
The invention provides an aqueous pigment ink composition that ensures excellent recording characteristics on any type of recording mediums. An aqueous pigment ink composition of the invention includes a pigment, a water-dispersible polymer, water, and a water-soluble organic solvent, where the pigment is dispersed as primary particles having an average primary particle diameter of not greater than 50 nm and as secondary particles having a ratio of an average secondary particle diameter to the average primary particle diameter in a range of 1 to 10, and the water-dispersible polymer has a minimum glass transition temperature of lower than 100° C. Using this polymer ensures good dispersion stability and favorable glossiness on a glossy medium.
本发明提供了一种水性颜料油墨组合物,它能确保在任何类型的记录介质上都具有优异的记录特性。本发明的水性颜料油墨组合物包括颜料、水分散性聚合物、水和水溶性有机溶剂,其中颜料分散为平均一次粒子直径不大于 50 纳米的一次粒子,以及平均二次粒子直径与平均一次粒子直径之比在 1 到 10 之间的二次粒子,水分散性聚合物的最低玻璃化温度低于 100 摄氏度。