To provide a printing ink composition using a polyurethane resin composition compatibilizing printability such as excellent fogging properties and printing properties such as excellent antiblocking property, adhesiveness, alcohol bleeding resistance or the like, in an ester/alcohol solvent system corresponding to exclusion of aromatic organic solvent such as toluene and xylene and ketone-based organic solvent such as methylethylketone and methylisobutylketone.
There is provided a polyurethane resin composition comprising: a polyurethane resin obtained by reacting an organic diamine and an alkanol amine with a urethane prepolymer that is made by reacting a polyisocyanate including tolylene diisocyanate, with a high-molecular polyol and that has an isocyanate group at a terminal thereof, wherein [NCO(total)]/[OH] and [NCO(TDI)]/[OH], the hydroxyl value of the polyurethane resin, and the ratio between the organic diamine and the alkanolamine are controlled, and a mixed solvent including an ester-based solvent and an alcohol.
SHITAKA MOTOI
KOTO MICHIHISA
NOMURA YUSHI
HATANO YUGO
TOYO INK CO LTD