Patent ID: 6248165
Filing Date: 2001-06-19
Classification: C09B

Abstract:
A single-phase ternary solid solution consisting of two different compounds of formulae ##STR34##wherein A and B, which must be different, are each a group of formula ##STR35##wherein R.sub.1 and R.sub.2 are each independently of the other hydrogen, methyl, tert-butyl, chloro, (CN, dimethylamino, phenyl,and a third component, which third component is a quinacridone of formula ##STR36##wherein R is hydrogen, halogen, C.sub.1 -C.sub.6 alkyl or C.sub.1 -C.sub.6 alkoxy, or which third component is a 1,4-diketopyrrolo[3,4-c]pyrrole different from I and II of the formula ##STR37##wherein Y is a group of formula ##STR38##with R.sub.1 and R.sub.2 having the same meaning given above,wherein the third component is greater than 28 mole percent relative to the sum of (I) plus (II) wherein R.sub.1 and R.sub.2 are each independently of the other methyl, tert-butyl, chloro and CN, andwherein the third component is greater than 4 mole percent relative to the sum of (I) plus (II) wherein R, and R are each independently of the other dimethylamino and phenyl, wherein the ternary solid solution has an x-ray diffraction pattern that is essentially the same as the x-ray diffraction pattern exhibited by a mixed crystal composed of an equimolar amount of (I) and (II); with the proviso that the third component is not a disubstituted quinacridone when components (1) and (II) are 1,4-diketo-3,6-diphenylpyrrolo[3,4-c]pyrrole and 1,4-diketo-3,6-di(4-chlorophenyl)pyrrolo[3,4-c]pyrrole.