Bright yellow bisazomethine pigments - for plastics printing inks, paints, textiles

摘要

Cpds. are of formula (I): (where X is -(CH2)n, -CH2-CH(CH3)- or n is 1, 2, 3, 4, 6 or 8) and are prepd. by reacting diamines NH2-X-NH2, with 2-hydroxy-3-carboxy-naphthaldehyde.