| abstract |
Disclosed is a branched urethane resin dispersant suitable for printing inks, resist inks and ink jet inks for color filters, paints, colored resin compositions, etc. and having dispersibility and stability excellent in non-aggregation and fluidity. . [MEANS FOR SOLVING PROBLEMS] One to 30 polyisocyanates obtained by reacting a polyisocyanate having three or more isocyanate groups with a monoalcohol at a molar ratio of NCO / OH = 3/2 to 3 / 0.5. A hydroxyl group in a terminal hydroxyl compound obtained by polymerizing a polyol compound containing an acrylic resin and / or a siloxane resin having two or more hydroxyl groups present with an atom in between, and an acid anhydride; A branched urethane resin dispersant obtained by reacting with a group-containing compound. [Effect] By using a branched urethane resin dispersant in the pigment composition, excellent dispersibility, fluidity and storage stability can be obtained at a low use amount. [Selection figure] None |