| abstract |
PROBLEM TO BE SOLVED: To be cured in a short time with high sensitivity to an active energy ray and printing on an ink non-absorbing resin substrate such as an acrylic plate or a polyvinyl chloride plate or an inorganic substrate such as glass. Of an active energy ray-curable ink composition for ink jet recording having excellent adhesion between a substrate and a substrate. The ink composition of the present invention contains at least a pigment, a compound having an ethylenically unsaturated double bond, a photopolymerization initiator, and a nonreactive acrylic resin, and the nonreactive (meth) acrylic resin comprises: A homopolymer of (meth) acrylic acid alkyl ester having a branched alkyl group having 3 to 6 carbon atoms, or (meth) acrylic acid methyl ester (MMA) and an alkyl group having 6 to 20 carbon atoms, or a cycloalkyl group. It is a copolymer with a (meth) acrylic acid alkylster having a MMA component of at least 10% by mass, a weight average molecular weight of 5,000 to 40,000, and 8 to 15 mass in the ink composition. %, And the viscosity at 40 ° C. of the ink composition is 5 mPa · s to 20 mPa · s. [Selection figure] None |