Producing metal complexes of azo compounds, useful as pigments, comprises reacting an azo compound with a metal salt and heat-treating the resulting suspension

摘要

Producing metal complexes of azo compounds (I) with a dispersion hardness above 250, optionally containing an intercalated compound (II), comprises reacting (I) with a metal salt and optionally (II) in water and optionally an organic solvent to form an aqueous suspension with a dispersion hardness of at least 250 (measured according to DIN 53775) and a metal complex concentration of at least 6 wt.%, and heat-treating the suspension. Producing metal complexes of azo compounds of formula (I) with a dispersion hardness above 250, optionally containing an intercalated compound (II), comprises reacting (I) with a metal salt and optionally (II) in water and optionally an organic solvent to form an aqueous suspension with a dispersion hardness of at least 250 (measured according to DIN 53775) and a metal complex concentration of at least 6 wt.%, and heat-treating the suspension. [Image] X, Y : rings optionally mono- or disubstituted with =O, =S, =NR 7, -NR 6R 7, -OR 6, -SR 6, -COOR 6, -CN, -CONR 6R 7, -SO 2R 8, -N(R 6)-CN, alkyl, cycloalkyl, aryl and aralkyl, provided that each ring has a total of three endo- and exocyclic double bonds; R 6H, alkyl, cycloalkyl, aryl or aralkyl; R 7H, CN, alkyl, cycloalkyl, aryl, aralkyl or acyl; R 8alkyl, cycloalkyl, aryl or aralkyl; R 1-R 4H, alkyl, cycloalkyl, aryl or aralkyl or form fused 5- or 6-membered rings; R 5OH, NR 6R 8, alkyl, cycloalkyl, aryl or aralkyl; m, n, o, p : 0 or 1; any substituents R 1-R 8 with CH bonds are optionally substituted in turn.