| 摘要 |
PROBLEM TO BE SOLVED: To provide a polyurethane urea resin for a binder of a printing ink, the resin which is excellent in pigment dispersibility, storage stability, re-dissolving property, adhesiveness to various plastic films and blocking resistance, and to provide a printing ink and a printed matter using the resin.SOLUTION: A polyurethane urea resin (C) is obtained by a chain-extending reaction of a urethane prepolymer (A) which is obtained by reacting a polyol (a) with a polyisocyanate (b), with an amino compound (B) which is obtained by subjecting a polyamine (c) to Michael addition reaction with a compound (d) having an unsaturated double bond. The molar number of unsaturated double bond groups included in the compound (d) is 0.2 to 0.8 moles with respect to 1 mole of primary and/or secondary amino groups included in the polyamine (c). |
