Mono azo pyrazolyl containing dyestuffs

Abstract

Abstract AZO DYESTUFFS FREE OF SULPHONIC ACID GROUPS AND HAVING THE FORMULA: 1-(A-N=N-((R-)M-1,4-PHENYLENE)-N(-R1)-CH2-CH(-R2)-),3-R3, 4-R4,5-R5-PYRAZOLE OR 1-(A-N=N-((R-)M-1,4-PHENYLENE)-N(-R1)-CH2-CH(-R2)-),2-R6, 3-R3,4-R4,5-R5-PYRAZOL-2-IUM X(-) WHEREIN A IS A DIAZO COMPONENT; R IS A NONIONIC SUBSTITUENT; R1 IS H, ALIPHATIC, ARALIPHATIC, OR AROMATIC; R2 IS H OR METHYL; R3, R4, AND R5 ARE H, ALKYL, ARYL, OR ARALKYL; R4 MAY ALSO BE CARBOALKOXY; R6 IS ALKYL OR BENZYL; AND M IS 0, 1, OR 2. THESE DYESTUFFS ARE USEFUL IN THE DYEING OR PRINTING OF FIBROUS MATERIALS, DYESTUFFS (II) PARTICULARLY FOR THOSE BASED OF POLYMERS OR COPOLYMERS OR ACRYLONITRILE AND DICYANO-ETHYLENE AND DYESTUFFS (I) PARTICULARLY FOR THOSE OF AROMATIC POLYESTERS. PROCESS FOR PREPARING THE ABOVE DYESTUFF BY COMBINING A-NH2 WITH A COUPLING COMPONENT HAVING THE FORMULA: 1-(((R-)M-PHENYL)-N(-R1)-CH2-CH(-R2)-),3-R3,4-R4,5-R5- PYRAZOLE OR 1-(((R-)M-PHENYL)-N(-R1)-CH2-CH(-R2)-),2-R6,3-R3,4-R4, 5-R5-PYRAZOL-2-IUM WHERE ALL SUBSTITUENT GROUPS HAVE THE ABOVE MEANINGS. PROCESS FOR PREPARING THE QUATERNARY SALT AZO DYESTUFF BY REACTING (I) WITH QUATERNIZING AGENT R6X.

Inventors

• 👤 Gerhard Wolfrum
• 👤 Walter Knobloch
• 👤 Heinrich Gold

Bibliographic Details