BINDER FOR PRINTING INK AND PRINTING INK COMPOSITION

摘要

PURPOSE:To provide the subject binder excellent in adhesivity, boiling resistance and storage stability, and suitable for plastic films, etc., by adding a prescribed amount of a specified imidazole compound to the solid content of a polyurethane resin. CONSTITUTION:The objective binder comprises (A) 100 pts.wt. of a polyurethane resin obtained by reacting a polymeric polyol such as a polyetherpolyol with a diisocyanate compound such as 4,4'-diphenylmethane diisocyanate and a chain extender such as ethylene diamine and (B) 0.01-50 pts.wt. of an isocyanate compound blocked with an imidazole compound of the formula (X, Y and Z are H, 1-20C alkyl, phenyl, benzyl, dithiocarboxyl, etc.), such as imidazole. The binder is used for the production of printing ink compositions.