NON-AQUEOUS PIGMENT INK

摘要

Disclosed is a non-aqueous pigment ink comprising a pigment, a non-aqueous solvent, and a non-aqueous resin dispersion microparticle capable of dispersing the pigment. The non-aqueous resin dispersion microparticle is an acrylic polymer having an alkyl (meth)acrylate unit having an alkyl group carruing 12 or more carbon atoms and a (meth)acrylate unit having a urethane group. The acrylic polymer is a copolymer of a monomer mixture containing an alkyl (meth)acrylate (A) having a alkyl group carrying 12 or more carbon atoms and a reactive (meth)acrylate (B) having a functional group capable of reacting with an amino group, wherein the urethane group is introduced therein through the reaction among the functional group capable of reacting with an amino group, an amino alcohol and a polyvalent isocyanate compound. In the acrylic polymer, the ratio of the copolymer moiety to the introduced urethane group moiety is 60:40 to 99:1 by mass.