NON-AQUEOUS INK-JET INK, INK COMPOSITION FOR INK-JET RECORDING, AND COLOR FILTER SUBSTRATE

摘要

Disclosed is a non-aqueous ink composition for ink-jet recording, comprising (A) an urethane resin dispersant having an acidic functional group, (B) a pigment and (C) an organic solvent [and optionally (D) a thermally reactive compound]. The dispersant (A) is a branched urethane resin dispersant prepared by polymerizing an isocyanate-terminated compound (p) with a compound (c) having one or more acidic groups and two or more hydroxyl groups and a polyol compound (q) having two or more hydroxyl groups between which 1 to 30 atoms are interposed, under hydroxyl-excess conditions. The isocyanate-terminated compound (p) is prepared by reacting a polyisocyanate (a) having three or more isocyanate groups with a monoalcohol (b) at such a ratio that the ratio of the number of moles of an isocyanate group derived from the component (a) (Ma) to that of a hydroxyl group derived from the component (b) (Mb) becomes 3/2 to 3/0.5 by mole. The polyisocyanate (a) is used in an amount of 25 to 60% by weight relative to the total amount of volatile components of the dispersant (A).