Water-insoluble violet benzimidazolone monoazo pigments of the formula:
wherein R1, R2 and R3 each represent hydrogen, chlorine, bromine, methyl, methoxy, ethoxy, nitro or a group of the formula —COOR with R being hydrogen, methyl or ethyl, and R4 represents hydrogen, chlorine, bromine, methyl, methoxy, ethoxy or nitro group. Due to the presence of two 5-membered heterocyclic rings in the molecule, these pigments display very high thermoresistance and excellent fastness to migration.
PIGMENT COMPOSITION, INKJET RECORDING INK, COLORING COMPOSITION FOR COLOR FILTER, AND COLOR FILTER
申请人:HIGASHI Masahiro
公开号:US20120001133A1
公开(公告)日:2012-01-05
A pigment composition including (A) an azo pigment represented by formula (1), and
at least one selected from the group consisting of (B) a coloring agent represented by formula (2), and (C) at least one selected from the group consisting of an additive represented by formula (3) and an additive represented by formula (4).
[EN] PROCESS FOR PRODUCING AZO COMPOUNDS, PIGMENT DISPERSION, COLORING COMPOSITION, INK FOR INKJET RECORDING, COLORING COMPOSITION FOR COLOR FILTER, AND COLOR FILTER<br/>[FR] PROCÉDÉ POUR LA PRODUCTION DE COMPOSÉS AZOÏQUES, DISPERSION DE PIGMENT, COMPOSITION COLORANTE, ENCRE POUR L'IMPRESSION PAR JET D'ENCRE, COMPOSITION COLORANTE POUR FILTRE COLORÉ ET FILTRE COLORÉ
申请人:FUJIFILM CORP
公开号:WO2011087147A1
公开(公告)日:2011-07-21
To provide a process for producing an azo pigment showing excellent coloring characteristics such as tinctorial strength and hue and showing excellent fastness such as light fastness and ozone fastness, an azo pigment dispersion, a coloring composition, and an ink for inkjet recording. A process for producing, for example, an azo pigment represented by the general formula (9), which includes a step of preparing a solution containing a compound represented by the following general formula (7) and an acid, and a step of bringing the solution incontact with a diazonium salt (8) derived from a heterocyclic amine.