IONICALLY COMPLEXED COLORANTS AND METHODS OF MAKING AND USING SAME

摘要

Provided are an ionically complexed colorant compound to exhibit excellent black color without color separation, a process for preparation of the compound and use thereof such as toner composition, ink composition or pre-concentrated composition. The colorant compound comprises (a) an ionic dye component with clear color property, (b) a first counter-ionic dye component having color different more than 10 DeltaE* units from color of the ionic dye component (a); and (c) a colorless counter-ionic component. The component(a) is combined with the first counter-ionic dye component(b) and the colorless counter-ionic component in desirable ratio to form the ionically complexed colorant compound having desirable color. The colorless component(c) is contained in amount of less than 40wt.% to total amount of the colorant compound. The colorant compound has a water solubility less than 100ppm and a molecular weight less than 5000 dalton.