POLYURETHANE FOR PRINTING INK BINDER, METHOD FOR PRODUCING THE SAME AND PRINTING INK

摘要

Provided is a polyurethane for printing ink binders excellent in solubility in a solvent having a low solvency, low viscosity and adhesion to films, and a method for producing the same. A method for producing urethane for printing ink binders, wherein a polyurethane is obtained by reacting a polyol (A), a polyisocyanate compound (B) and a chain extender (C), and the polyol (A) contains a polyesterether polyol (A1) which is obtained by copolymerizing a polycarboxylic acid anhydride (b) and an alkylene oxide (c) to an initiator (a) in the presence of a catalyst (x).