Biscationic monoazo dyes for acid-modified nylon

Abstract

Abstract Red to rubine biscationic monoazo dyes having the formula WHEREIN R1 and R2 H, alkyl or phenyl R3 alkyl or benzyl R4 H, alkyl, alkoxy, Cl, NHCO alkyl or NHCOC6H5 R5 Cl, alkyl or alkoxy WHEREIN R6 alkyl R7 alkyl or hydroxyalkyl R8 alkyl, hydroxyalkyl or benzyl or R7 and R8 together are piperidino or pyrrolidino R6, R7 and R8 together or pyridinium A is anion and ALKYL ONE TO FOUR CARBON ATOMS ARE USEFUL FOR DYEING NYLON STYLING YARNS, HAVE BRIGHT SHADES WITH GOOD BUILDUP AND LIGHTFASTNESS ON ACID-MODIFIED NYLON WITH NEGLIGIBLE AFFINITY FOR UNMODIFIED NYLONS WHEN DYED THEREON AT A PH of from about 6 to about 6.5. WHEREIN N O or 1 Z H when n O Z OH when n 1

Inventors

• 👤 Daniel Shaw James

Bibliographic Details