| 摘要 |
PROBLEM TO BE SOLVED: To provide a pigment dispersion composition exhibiting excellent image density, dispersibility and preservation stability, and also excellent in re-dissolvability, marker resistance and scratch resistance.SOLUTION: This pigment dispersion composition is provided by containing the aqueous dispersion of (A) a polyurethane resin-added pigment, obtained by preparing a pigment having an un-reacted amino group on its surface by bringing (I) a pigment having an acid group on its surface in contact with (II) a basic compound having ≥2 amino groups selected from a primary amino group and a secondary amino group in an aqueous medium, and further bringing the pigment in contact with (III) a polyisocyanate polyurethane resin having ≥2 terminal isocyanate groups to form a urea bond, and (B) an aqueous dispersed resin having 10 to 300 nm mean particle diameter. |
