Basic azo dyestuffs containing a heterocyclic diazo component and a para- N-tertiary or quaternary heterocyclic amine alkylene amino benzene coupling component

摘要

Basic azo dyestuffs of the formulaPPWHERE P PA is heterocyclic disazo component of the thiazole, benzthiazole or thiadiazole series,PPR.sub.1 and R.sub.2 are hydrogen, chlorine, lower alkyl or lower alkoxy,PPX is hydrogen, an alkyl, aralkyl, cycloalkyl or aryl group,P PM IS 2 TO 2, PPZ is the residue of a quaternizable heterocyclic amine bound via its ring nitrogen atom,PP ARE DISPERSE DYESTUFFS PARTICULARLY USEFUL WITH POLYESTER TEXTILES AND PROVIDE DYEINGS OF GOOD GENERAL FASTNESS, NOTABLY FASTNESS TO LIGHT.