AZO PIGMENTS, PIGMENT DISPERSION, COLORING COMPOSITION, AND INK FOR INKJET RECORDING
申请人:Seto Nobuo
公开号:US20110011306A1
公开(公告)日:2011-01-20
An azo pigment showing excellent coloring characteristics such as tinctorial strength and hue and excellent fastness such as light fastness, and a pigment dispersion containing the azo pigment are provided.
An azo pigment represented by the following general formula (1) and a pigment dispersion containing the pigment:
wherein G represents an aliphatic group, an aryl group, or a heterocyclic group, Y represents a hydrogen atom or an aliphatic group, R
1
represents an aliphatic group, an aliphatic amino group, an arylamino group, a heterocyclic amino group, an acylamino group, a sulfonamido group, an amino group, or a heterocyclic group, R
2
and R
3
each independently represents an aliphatic amino group, an arylamino group, a heterocyclic amino group, an acylamino group, a sulfonamido group, an amino group, or a heterocyclic group, X
1
represents a nitrogen atom or C—Z, Z represents an electron-withdrawing group having a Hammett σp value of 0.2 or more, X
2
represents a nitrogen atom or C—R
5
, R
5
represents a hydrogen atom, a cyano group, a carbamoyl group, an aliphatic oxycarbonyl group, or a carboxyl group, and n represents an integer of from 1 to 4.