| 摘要 |
<p>Disclosed are an azo pigment and a pigment dispersion which have excellent color characteristics such as coloring power and hue, while exhibiting excellent durability such as light resistance. Specifically disclosed are an azo pigment represented by general formula (1) and a pigment dispersion. (1) (In the formula, G represents an aliphatic group, an aryl group or a heterocyclic group; Y represents a hydrogen atom or an aliphatic group; R1 represents an aliphatic group, an aliphatic amino group, an arylamino group, a heterocyclic amino group, an acylamino group, a sulfonamide group, an amino group or a heterocyclic group; R2 and R3 each represents an aliphatic amino group, an arylamino group, a heterocyclic amino group, an acylamino group, a sulfonamide group, an amino group or a heterocyclic group; X1 represents a nitrogen atom or C-Z; Z represents an electron-withdrawing group having a Hammett substituent constant sp of not less than 0.2; X2 represents a nitrogen atom or C-R5; R5 represents a hydrogen atom, a cyano group, a carbamoyl group, an aliphatic oxycarbonyl group or a carboxyl group; and n represents an integer of 1-4.)</p> |
