| 摘要 |
This invention provides a pigment dispersing resin which is a copolymer of: (A) sulfonic group-containing polymerizable unsaturated monomer, (B) polyoxyalkylene chain-containing nonionic polymerizable unsaturated monomer, (C) (C-1) (meth)acrylic acid ester type polymerizable monomer having two tertiary alkyl groups per molecule and/or (C-2) (meth)acrylic acid ester type polymerizable monomer having one tertiary alkyl group and one secondary hydroxyl group per molecule, and (D) other ethylenically unsaturated monomer; and also provides water-based pigment dispersion which comprises said pigment dispersing resin, pigment, aqueous medium and, as circumstances may demand, basic neutralizer and/or dispersing agent as well.
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