| 摘要 |
A cationic aqueous pigment dispersion comprising a pigment, a dispersing agent and an aqueous medium, in which the dispersing agent is a water-solubilized or water-dispersed product of a copolymer obtained by copolymerization of (A) 3 to 90 parts by weight of a modified vinylic unsaturated monomer having a fatty acid residue with at least 8 carbon atoms at the molecular terminal, (B) 2 to 90 parts by weight of a nitrogen-containing macromonomer having at least one radical-polymerizable functional group selected from acryloyloxy, methacryloyloxy, allyloxy and an aromatic vinyl group at one end, (C) 1 to 50 parts by weight of at least one vinylic monomer selected from aminoalkyl (meth)acrylates, aminoalkyl-(meth)acrylamides and glycidyl group-containing vinylic unsaturated monomers, (D) 0 to 91 parts by weight of an unsaturated monomer having a nitrogen-containing heterocyclic ring, and (E) 0 to 91 parts by weight of an alpha,beta-ethylenically unsaturated monomer other than (A), (B), (C) and (D) above.
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