Aqueous dyeing of acid-dyeable polyamide fibers using yellow-to-orange disazo dyes

Abstract

Abstract IN AN AQUEOUS PROCESS FOR DYEING TEXTILE MATERIALS COMPRISED OF POLYAMIDES, PARTICULARLY DEEP-DYEABLE POLYAMIDES AND POLYAMIDE STYLING YARNS AND FIBERS, AT A PH OF 3-7 AND AT A TEMPERATURE UP TO THE BOIL, IN THE PRESENCE OF DYES AND DYEING ASSITANTS, THE IMPROVEMENT OF USING YELLOW-TO-ORANGE DISAZO DYES OF THE STRUCTURE (2-HO,3-R1,5-R-PHENYL)-N=N-B-N=N-A WHEREIN A= (R2)N,(M-O3S-)PHENYL, OR (M-O3S-)NAPHTHYL THE SO3M GROUP IN THE LATTER STRUCTURE BEING SUBSTITUTED IN EITHER AROMATIC RING OF THE MAPHTHALENE NUCLEUS; R2=METHYL, METHOXY, NHCOCH3, CL OR BR; N=3, 1 OR 2; M=H, ALKALI METAL OR AMMONIUM CATION; B= (2-Y,5-Y-1,4-PHENYLENE), OR 1,4-NAPHTHYLENE X AND Y=H, C1-2 ALKYL OR C1-2 ALKOXY; R=C1-5ALKYL, -NHCOC1-4ALKYL, OR , WHEN X(OR BOTH X AND Y) IS A SUBSTITUENT OTHER THAN H, CL OR BR; AND R1=H OR C1-5 ALKYL.

Inventors

• 👤 Daniel S James

Bibliographic Details