| 摘要 |
PROBLEM TO BE SOLVED: To provide a binder for inkjet printing ink which is excellent in ink discharge properties and composition stability and can form printed matter with excellent scratch resistance and alkali resistance, and a method for producing the same.SOLUTION: The method for producing the binder for inkjet printing ink includes steps of: (1) reacting a polyol and a polyisocyanate in an organic solvent or the like to obtain a polyurethane (A1), and supplying an organic solvent thereto as needed to prepare an organic solvent solution [I] of the polyurethane (A1); (2) mixing the organic solvent solution [I], the polyisocyanate (A2), the polyamine (A3), the acetylene compound (B) and the aqueous medium (C) to thereby obtain a mixture [II] including a composite resin particle (A4) obtained by reacting the polyurethane (A1), the polyisocyanate (A2) and the polyamine (A3); and (3) removing the organic solvent included in the mixture [II]. |
