METHOD FOR MANUFACTURING WATER-BASED DISPERSION OF SELF-DISPERSING POLYMER, WATER-BASED INK COMPOSITION, INK SET AND IMAGE FORMING METHOD

摘要

The invention provides a method for manufacturing a water-based dispersion of a self-dispersing polymer, including: obtaining a copolymer solution including a copolymer having a hydrophilic constituent unit and a hydrophobic constituent unit, and a solvent dissolving that dissolves the copolymer; obtaining a water-based dispersion of the copolymer through dispersion using the copolymer solution and water; and adding a water-soluble electrolyte selected from an acidic compound and the salt thereof to either or both of the copolymer solution and the water-based dispersion, as well as a water-based ink composition including the water-based dispersion, an ink set including the water-based ink composition, and an image forming method using the water-based ink composition or the ink set.