| 摘要 |
PROBLEM TO BE SOLVED: To provide printing ink in which 95% or more of its solvent component is composed of single variety alcohol-based solvent and water, which not only has high drying properties, printing stability and physical properties, but also facilitates recovery of volatile solvent at the time of printing, and reduces trapping defects due to infiltration of ink.SOLUTION: This printing ink includes a single variety alcohol-based solvent (G) and a polyurethanepolyurea resin, which is obtained by reacting a urethane prepolymer with an amino group-containing chain extender (E) and a reaction terminator (F), where the urethane prepolymer is obtained by reacting a mixture of a polyesterdiol (A) and a polyetherdiol (B), the compositional ratio thereof is 15:85 to 85:15, with a dihydroxycarboxylic acid, an alkyldiol (C) and an isocyanate compound (D). |
