Disazo dyestuffs containing a bridging group and at least one quaternary ammonium group

摘要: DISAZO COMPOUNDS OF THE FORMULA D-N=N-A-N(-R'')-R" D-N=N-(A-N-(-R'')-R")-Z-(N(-R'')(-R")-A)-N=N-D IN WHICH D REPRESENTS RESIDUE A MONOCYCLIC OR BICYCLIC DIAZO COMPONENT, AN ARYLENE AND R'' R" EACH ALKYL RESIDUE, ARE LINKED TOGETHER VIA THEIR COUPLING COMPONENTS THROUGH BIFUNCTIONAL BRIDGING GROUP Z HAS NO DYESTUFF CHARACTERTISTICS CONTAINS AT LEAST ONE QUATERNATED NITROGEN ATOM. USEFUL FOR DYEING PRINTING SYNTHETIC FIBERS, PRODUCE INTENSE LEVEL DYEINGS POSSESSING GOOD FASTNESS TO LIGHT, WASHING, PERSPIRATION SUBLIMATION.