Diazo compounds obtained by coupling acetoacetanilides with tetrazotized diaminobenzanilides
Abstract
Abstract Yellow pigments having a greenish hue are represented by the formula: ##STR1## wherein X 1 and X 2 may be the same or different from one another and each is hydrogen, halogen (chlorine, fluorine or bromine), lower alkyl or alkoxy having from 1 to 3 carbon atoms; and wherein R 1 and R 2 may be the same or different from one another and each is the residue from an acyl-acetyl-amino-aromatic coupling agent or the residue from a pyrazolone coupling agent. Pigments are obtained by coupling of (1) an aceto-acetyl-amino-aromatic compound or (2) of a pyrazoline, with a 4,4'-diamino-benzanilide. The yellow pigments have the characteristic of having a high tintorial yield, a high degree of purity of tone (brightness), a good fastness to light, and good resistance to organic solvents. These pigments are particularly useful in the polychrome graphic industry.
Inventors
- 👤 Ugo Moiso
- 👤 Vincenzo Massabo
- 👤 Danilo Domenis
Bibliographic Details
Claims Analysis
Total Claims: 4References Cited (Backward Citations)
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