MIXED CRYSTAL PIGMENTS OF THE QUINACRIDONE SERIES

摘要

New quinacridone mixed crystal pigments consisting ofa) from 85 to 99% by weight of unsubstituted .beta.-phase quinacridone of theformula (I)(see formula I)in which R1 and R2 are hydrogen atoms andb) from 1 to 15% by weight of one or more substituted quinacridones of theformula(I) in which the substituents R1 and R2 are identical or different and arechlorine,bromine or fluorine atoms or C1-C4 alkyl, C1-C4 alkoxy or carboxamido groupswhichcan be substituted by C1-C6-alkyl groups, and R1 may additionally be hydrogen,are valuable quinacridones in the red-violet range.