| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To obtain an azo lake pigment composition useful for various coloring applications, affording an ink having excellent heat resistance, transparency, tinting strength, fluidity, or the like, when used for preparing, e.g. a printing ink and having a bright hue and scarcely coloring wastewater during flushing. <P>SOLUTION: The azo lake pigment composition comprises an azo lake pigment prepared by coupling a diazonium salt of an aromatic amine having a water-soluble group of a diazo component withβ-naphthol orβ-oxynaphthoic acid and carrying out laking after or simultaneously with the coupling. The azo lake pigment composition is characterized in that the azo lake pigment is prepared by substituting a part of the aromatic amine with an imidazolone amine compound such as 5-amino-benzimidazolone. <P>COPYRIGHT: (C)2004,JPO</p> |
