논문 상세보기
Two new synergists are proposed for pigment dispersion in pigment ink. Benzoic acid was applied to Pigment Yellow 74 (PY-74) and Pigment Yellow 150 (PY-150) as a hydrophilic functional group to synthesize (E)-4-(((3-(2-(2-methoxy-4-nitrophenyl)hydrazono)-4-oxopent-1-en-2-yl)(2-methoxyph enyl)am-ino)methyl)benzoic acid (PY-74BA) and (E)-4-((2,4,6-trioxo-5-((2,4,6-trioxohexahydropyrimidin-5-yl)di-azenyl)tetrahydropyrimidin-1(2H)-yl)methyl)ben zoic acid (PY-150BA). Whereas pigment showed extremely low solubility in water and organic solvents like DMSO, DMF and methanol, two synergists were found to have higher solubility than pigment. This result can be interpreted as reduction of particle aggregation by increased polarity. Two synergists applied to pigment ink are expected to improve dispersion property and storage stability of ink.
