| 摘要 |
PROBLEM TO BE SOLVED: To provide a polyurethane polyurea resin that has high solubility in an alcohol solvent that is easily recovered, hardly causes plate fogging when made into printing ink, has good highlight transferability, excellent blocking resistance and laminate adhesive strength and improved stability even when water is added from air during printing and printing ink using the same.SOLUTION: A polyurethane polyurea resin is obtained by reacting a polyester diol (A), a polyoxyalkylene glycol (B), a monoalcohol (C) having a polyoxyalkylene skeleton in the molecular structure, a diisocyanate (D) and a tri-tetrahydric polyhydric alcohol (E1) or a tri-tetrafunctional polyisocyanate (E2) as essential components to give a polyurethane prepolymer (X) and reacting the polyurethane prepolymer and a diamine (F2) as essential components and has a weight-average molecular weight (Mw) of 20,000-80,000. |
