| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide aqueous inkjet recording ink having a small dispersion diameter of a pigment and excellent dispersion stability, and to provide a method for producing the ink. <P>SOLUTION: The aqueous ink includes resin-coated pigment particles coated with a water-insoluble resin, water and a water-soluble organic solvent including at least one hydroxyl group, wherein the water-insoluble resin has a salt-forming group and a structural unit which is derived from a methacrylate and has an aromatic ring linked via a linking group to an atom in the main chain of the water-insoluble resin, and the water-insoluble resin satisfies the following conditions (A). The conditions (A) are, when the water-insoluble resin, an organic solvent, one equivalent of a neutralizing agent with respect to the salt-forming group, and water are mixed with a total content of the water-insoluble resin and the organic solvent being 35% by mass relative to the total mass of the mixture, an emulsion is formed without precipitation of the water-insoluble resin, and that after the emulsion is allowed to stand for three hours, a transparent single phase is formed, or two separate phases are formed and at least an aqueous phase of the two phases is transparent. <P>COPYRIGHT: (C)2009,JPO&INPIT |
