Yellow pigments benzimidazolone yellows

Yellow pigments chrome yellow, benzimidazolone yellow... 

After Wodd War II the most important discovery was the family of red—violet quinacridone pigments, followed by the mosdy yellow-orange benzimidazolone and isoindolinone pigments, and the most recent development of the red diaryl pyrrolopyrroles. On a value basis, polycyclic pigments, excluding copper phthalocyanines, represent about 17% of the wodd oiganic pigment market (4). 

Benzimidazolone yellow H2G. See Pigment yellow 120 Benzimidazolone yellow H3G. See Pigment yellow 154 Benzimidazolone yellow H4G Benzimidazolone yellow R151Y. See Pigment yellow 151... 

Synonyms Benzimidazolone yellow FI4G BenzimidazoloneyellowR151Y Benzoic acid, 2-(1-(2,3-dihydro-2-oxo-1H-benzimidazol-5-yl) amino) carbonyl)-2-oxopropyl) azo) Cl 13980 Cl pigment yellow 151 Classification Monoazo color... 

Synonyms Benzimidazolone yellow FI3G Empirical C18FI14F3N5O3 Properties Orange solid m.w. 405.33 Uses Pigment in paints, plastics ManufJDistrib. Rampak Group... 

Figure 10.6 Reflectance curve for a representative benzimidazolone pigment (Hostaperm Yellow H3G).

The most important coupling component for pigments in the yellow range is 5-acetoacetylamino-benzimidazolone (25), while red pigments are derived primarily from 5-(2 -hydroxy-3 -naphthoyl)-aminobenzimidazolone (26). 

The chemistry and manufacture of the coupling components for yellow/orange and red benzimidazolone pigments are treated separately. 

Yellow and Orange Benzimidazolone Pigments -Coupling Component... 

Single crystals [3-5] of a yellow (27) and a red (28) benzimidazolone pigment have been studied by X-ray diffraction analysis. 

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