Solid solutions of pyrrolo-(3,4-C)-pyrrols

Abstract

A solid solution of 1,4-diketopyrrolo-[3,4-c]-pyrrols consisting of two different compounds of the formulae ##STR1## the formulae ##STR2## or the formulae ##STR3## wherein A is one of the groups ##STR4## and B, E and D are each independently a group ##STR5## where R.sub.1 and R.sub.2 are each independently hydrogen, halogen, C.sub.1 -C.sub.5 -alkyl, C.sub.1 -C.sub.5 -alkoxy, --SR.sub.3, --N(R.sub.3).sub.2,--CF.sub.3,--CN, a group ##STR6## R.sub.3 is C.sub.1 -C.sub.5 -alkyl and R.sub.4 and R.sub.5 are each independently hydrogen, halogen, C.sub.1 -C.sub.5 -alkyl, C.sub.1 -C.sub.5 -alkoxy,--SR.sub.3 or--CN having X-ray diffraction patterns which differ from the sum of the X-ray diffraction patterns of the individual components. Such solid solutions are excellently suited as pigments for the coloration of high molecular organic material.

Dependencies are inferred from the claim text.