AQUEOUS RESIN, AND INK CONTAINING THE SAME

摘要

PROBLEM TO BE SOLVED: To produce an aqueous resin by the method in which a step for removing solvent is essentially needless, and to provide an ink containing the obtained aqueous resin and useful for being applied to film, paper or the like. SOLUTION: This aqueous resin is obtained by the following three steps: [1] reacting a polyol with an organic polyisocyanate in the absence of solvent to obtain (A) a polyurethane having a number-average molecular weight of <=30,000; [2] dispersing the polyurethane A in water in the presence of an unsaturated monomer to prepare (B) the aqueous dispersed product of a polyurethane solution; [3] radical-polymerizing the aqueous dispersed product B. The polyurethane obtained in the first step has dissociative groups capable of being ionized.