| abstract |
DYESTUFFS WHICH ARE FREE FROM WATER-SOLUBLIZNG GROUPS DISSOCIATING ACID IN WATER AND CORRESPONDING TO THE FORMULA 1-(A-N=N-),2-X,4-(R-O-CH2-CH(-O-Z)-CH2-N(-CH2-CH2-CN)-), 5-Y-BENZENE WHEREIN A REPRESENTS THE RESIDUE OF A DIAZO COMPONENT OF THE BENZENE SERIES HAVING AT LEAST ONE NON-IONOGENIC, ELECTRON-ATTRACTING SUBSTITUENT OR THE RADICAL OF A DIAZO COMPONENT OF THE HETEROCYCLIC SERIES, X AND Y REPRESENT INDEPENDENTLY OF EACH OTHER, HYDROGEN, A LOWER ALKYL GROUP, LOWER ALKANOYLAMINO OR HALOGEN, Z REPRESENTS AN ACYL RADICAL AND R REPRESENTS AN OPTIONALLY SUBSTITUTED LOWER ALKYL, CYCLOALKYL, ARALKYL OR ARYL RADICAL. THESE DYESTUFFS ARE DISTINGUISHED BY GOOD AFFINITY ESPECIALLY FOR POLYESTER FIBERS, AFFORDING DYEINGS ON THESE FIBERS WHICH HAVE GOOD FASTNESS PROPERTIES AND ESPECIALLY GOOD FASTNESS TO LIGHT AND SUBLIMATION. |