| 摘要 |
PROBLEM TO BE SOLVED: To provide a printing ink composition which mainly contains isopropanol as a solvent, is excellent in dispersibility and storage stability of a coloring agent, and is excellent in inking property at the time of long-run printing.SOLUTION: There is provided an alcohol printing ink composition which contains a polyurethaneurea resin (D) formed by reaction of polyol (A), diisocyanate (B), and a chain extender (C), a coloring agent (E), a dispersant (F), and a solvent containing isopropanol, where (1) the polyol (A) contains hydrogenated castor oil polyol (A1), (2) the dispersant (F) contains a comb-type dispersant (F1) having a styrene skeleton in the main chain and a polyalkylene oxide chain (f1) in the side chain, and (3) the isopropanol is 50 wt.% or more in the whole solvent.SELECTED DRAWING: None |
