| 摘要 |
PURPOSE:To obtain the recording ink having excellent abrasion properties on a material to be printed, mechanical fastness, etc., by adding an adduct compound of a polyisocyanate with an amino-alcohol to water-based pigment ink comprising water, a water-soluble organic solvent and a pigment dispersion. CONSTITUTION:The water-based pigment ink is obtained by blending water- based pigment ink comprising (A) water, (B) a water-soluble organic solvent (e.g. ethylene glycol, hexylene glycol or ethanol) and (C) a pigment dispersion composed of pigment (preferably 1-20%, more preferably 2-12% by weight ratio) and a dispersant (e.g. styrene or vinylnaphthalene) with 0.5-15wt.%, preferably 3-10wt.% in ink of an adduct of a polyisocyanate with an amino-alcohol of preferably formula I, formula II or formula III (R is polyisocyanate residue; R1 to R4 are amino-alcohol residue) (e.g. compound of formula IV). |
