| abstract |
This invention provides both a pigment dispersing resinnwhich is a copolymer of:n (A) polymerizable unsaturated monomer containing at leastnone kind of ionic functional group selected from the group consistingnof tertiary amino group, quaternary ammonium salt and sulfonic acidngroup; (B) nonionic polymerizable unsaturated monomer havingnpolyoxyalkylene chain; (C) ultraviolet-absorbing polymerizable unsaturated monomernand/or an ultraviolet-stabilizing polymerizable unsaturatednmonomer; and (D) other ethylenically unsaturated monomer, nand water-based pigment dispersion which comprises said pigmentndispersing resin, pigment, aqueous medium and, as circumstancesnmay demand, dispersing agent as well. |