WATER-BASE COLORED RESIN DISPERSION, WATER-BASE INK, AND INK JET RECORDING LIQUID

摘要

PROBLEM TO BE SOLVED: To provide a water-base colored resin dispersion which has a good storage stability and enables high-density recording without causing blur by incorporating fine colored resin particles obtd., by the emulsion polymn. of a polymerizable unsatd. monomer using an anionic and/or a nonionic reactive emulsifier in the presence of a colorant in a water-base medium into the same. SOLUTION: Fine colored resin particles are obtd. by dissolving or dispersing a colorant in a polymerizable unsatd. monomer and subjecting the resultant dispersion to emulsion polymn. using a reactive emulsifier and have an average particle size of 0.01-1μm. Pref. examples of the monomer are a vinylarom. hydrocarbon (e.g. styrene) and a (meth)acrylic ester (e.g. methyl acrylate). Any reactive surfactant may be used only if it has e.g. a free-radical-polymerizableα,β-ethylenically unsatd. group and a surface active function. The polymn. is conducted at 40-100 deg.C for 1-12hr. After the reaction, the resultant emulsion is adjusted to a pH of 5 or higher.