TWI478983B
The present invention is a black azo pigment which has both of the optical properties of a visible light shielding property and an infrared ray transmitting property, and which has a structure that has, in the molecule thereof, at least two azo bonds and at least one 2-hydroxy-11H-benzo[a]-carbazole...
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Zusammenfassung: | The present invention is a black azo pigment which has both of the optical properties of a visible light shielding property and an infrared ray transmitting property, and which has a structure that has, in the molecule thereof, at least two azo bonds and at least one 2-hydroxy-11H-benzo[a]-carbazole-3-carboxylic acid amide residue derived from a coupling component, wherein the black azo pigment is characterized by having an average particle diameter of 10-200 nm. The present invention enables the provision of: a black pigment which exhibits excellent physical properties and color fastness as a pigment, can be used in various use applications, and exhibits both of the optical properties of a visible light shielding property and an infrared ray transmitting property; a process for producing the pigment; a colored composition containing the pigment; and a coloring method and a colored article, in each of which the colored composition is used. |
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