PREPARATION METHOD OF AQUEOUS NANO PIGMENT DISPERSION

摘要

Embodiments of the invention disclose a method for preparing an aqueous nano-pigment dispersion. The method comprises mixing 2.5wt%ˆ¼40wt% styrene with polymerization inhibitors removed by evaporation, 2.5wt%ˆ¼20wt% acrylate monomer, 0.25wt%ˆ¼5wt% crosslinking monomer, 0.05wt%ˆ¼0.5wt% emulsification adjuvant, and 0.05wt%ˆ¼0.5wt% oil soluble initiator, adding 0.25wt%ˆ¼2.5wt% organic pigments to be dispersed to form an oil phase solution after dissolution; dissolving 0.05wt%ˆ¼2wt% emulsifier and 0.05wt%ˆ¼2wt% buffer in 40wt%wtˆ¼90wt% deionized water to form an aqueous solution; mixing the oil phase solution and the aqueous phase solution, and then homogenizing them into fine emulsion; transferring the fine emulsion into a reactor; heating to increase the temperature to initiate the polymerization; after reacting, adding an alkaline soluble monomer; after continuing the reaction, cooling the temperature to the room temperature; adjusting pH to weak alkaline; and filtering to obtain the aqueous nano-pigment dispersion.