Лако-красочные материалы — производство

Azo pigments are the most common organic pigments and cover a large volume of the commercially available organic pigments. They are compounds having an azo group (-N=N-) in their structure as the chromophore (color producing group). Azo pigments are synthe­sized by the standard sequence of diazonium salt formation from an aromatic amine and subsequent reaction with a wide choice of coupling components that allow the possibility of a wide range of products in this class. Normally they produce a range of yellow, red and orange pigments with a few browns and violets. Azo pigments are further divided into the following groups.