Patent ID: 8022131

Claim:
A method for producing a water dispersion for ink-jet printing, comprising: polymerizing an ethylenically unsaturated monomer in the presence of at least one reactive surfactant and at least one inorganic peroxide initiator to form an emulsion comprising emulsion polymer particles (C) which are particles of a polymer including reacted units of the reactive surfactant and have a glass transition temperature of 50° C. or lower; forming a water dispersion of self-emulsifiable polymer particles (B) comprising a polymer having polymerizable units of one or more salt-forming group-containing monomers by dropping an organic solvent and a water-insoluble polymer containing one or more of monomer units having a salt-forming group-containing monomer unit (a), and at least one of a macromer monomer unit (b) and a hydrophobic monomer unit (c) into a neutralizing agent and an aqueous medium, mixing and stirring a mixture containing the water-insoluble polymer, the organic solvent, the neutralizing agent and the aqueous medium, and then removing the organic solvent from the mixture; and mixing a self-dispersible carbon black (A), the water dispersion of self-emulsifiable polymer particles (B), and the emulsion comprising the emulsion polymer particles (C) to form the water dispersion.