| 摘要 |
PROBLEM TO BE SOLVED: To provide a pigment dispersion composition which is excellent in the pigment dispersibility in a nonaqueous solvent and besides which has a dispersant immobilized on the surface of the pigment and has the dispersant elution inhibited in a nonaqueous solvent. SOLUTION: The nonaqueous pigment dispersion composition contains a pigment (A), a nonaqueous solvent (B) and a polymer (C), the polymer (C) having at the one end a constitutional unit (c1) derived from a nitrogen atom-containing polymerizable macromonomer with an ethylenically unsaturated bond and having at the other end a constitutional unit (c2) derived from a polymerizable macromonomer with an ethylenically unsaturated double bond and no nitrogen atom and also having a constitutional unit (c3) derived from the monomer that has an ethylenically unsaturated double bond copolymerizable with the macromonomers of the above constitutional units and that has the solubility parameter with the difference (Δsp) of 1.0 or more from that of the nonaqueous solvent (B). COPYRIGHT: (C)2008,JPO&INPIT
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