Patent ID: 10442947

Abstract:
Colored fine-particle dispersion for ink-jet printing. The colored fine-particle dispersion is produced by subjecting dispersion including pigment, polymerizable monomer, polymerizable surfactant, and water to emulsion polymerization, including dispersing a mixed solution including the pigment, the polymerizable surfactant, the water, and an organic solvent to prepare a dispersion 1; removing the organic solvent from the dispersion 1 to prepare a dispersion 2; and subjecting the dispersion 2 and the polymerizable monomer to emulsion polymerization to obtain the colored fine-particle dispersion. The process for producing the ink includes mixing the obtained colored fine-particle dispersion and an organic solvent B. The colored fine-particle dispersion includes colored fine-particles with average particle size of 10 to 300 nm. The colored fine-particle dispersion may be used in a water-based ink for ink-jet printing, and provides high-gloss printed characters or images excellent in rub fastness when printed on a low-water absorbing recording medium.