| abstract |
Compound represented by the general formula (1) in which the aqueous polymer reacts a diol compound having one or two carboxyl groups and a diisocyanate compound in one molecule, as a pigment dispersion containing water, an aqueous polymer, and a pigment as essential components. The pigment dispersion liquid which is a carboxyl group-containing polyurethane formed by making the reaction product which has a main component and the reaction index computed by (1) and the diol compound and a diisocyanate compound in the range of 0.95-1.10 reacts, and aqueous inkjet recording ink. Reaction index = (reaction rate of isocyanato group) x (moles of diisocyanate compound (B) / moles of diol compound (A)) (Formula 1) |