Process for the improvement of dyeing properties of pigments of the anilino and arylmercapto anthraquinone series

摘要

Process for the improvement of dyeing properties of pigments of the anilino and arylmercapto anthraquinone series for bulk dyeing linear polyesters by halogenation of unhalogenated or lower halogenated compounds of the formula WHEREIN A is an anthraquinoidal radical being free from nitro groups, X is -NH- or -S-, n is a number of 1 to 4 and R1 to R5 are hydrogen, halogen, alkyl, alkoxy, aryloxy, arylcarbonyl or arylsulphonyl.