azomethine pigment, production process and their applications in organic pigment, macromolecular

摘要

Azomethine pigments of the formula IMAGE or of the tautomeric formula IMAGE in which D denotes the radical of an aromatic or heteroaromatic amine which is free from sulphonic acid groups, R1 denotes hydrogen or C1-C4-alkyl, in particular methyl, or both the R1, at the same time, denote CO, R2 denotes a substituent, m denotes an integer, preferably 1 or 2, and n denotes 0, 1, 2, 3 or 4, a processes for their preparation.