| abstract |
(57) [Abstract] [Problem] Colored polyester aqueous dispersion useful as a recording agent capable of high-quality image recording and printing on any material and having both high reliability and storage stability. Body donation. SOLUTION: A dye and / or pigment, preferably an ionic group-containing polyester resin and a hydrophilic solvent are mixed and dissolved, and water is added to emulsify and then desolventize to obtain colored polyester fine particles. Secondary aggregation with Amorphous particles are obtained. In an aqueous dispersion containing irregular particles as a dispersoid and a medium containing water as a main component as a dispersion medium, the dispersoid concentration and the dispersion viscosity have a relationship satisfying the following formula (I): Coloring Polyester water dispersion. (Equation 1) However, [In the formula, η i is the viscosity (cp s), η0 is the viscosity (cp) of the aqueous dispersion medium at 20 ° C. s), S represents the dispersoid concentration (effective volume ratio)] |