Yellow to orange disazo cationic dyes containing two heterocyclic quaternary ammonium groups

Abstract

Abstract Biscationic disazo dyes having good exhaust and buildup on acid-modified BCF nylon fibers as well as good lightfastness and wetfastness on such fibers; and a process for dyeing nylon therewith at a pH of about 4 to 7. The dyes have the formula: ##SPC1## Wherein X is selected from --CH 2 --, --C(CH 3 ) 2 --, --NH--, --O--, --OCH 2 (CH 2 ) 1 -2 O--, --OCH 2 CH(OH)CH 2 O--, --SO 2 --, --S--, --S--S--, --NHCO--, and --NHCONH--; R 1 is selected from H, CH 3 , C 2 H 5 , Cl, and Br; R 2 is selected from H, alkyl, alkoxy, Cl, NHCO-alkyl, and NHCOC 6 H 5 ; R 3 is selected from H, alkyl, and alkoxy; Y + is selected from ##EQU1## wherein n is 0 or 1; Z is H when n is 0 and Z is OH when n is 1; Q + is selected from NR 4 R 5 R 6 , and NHCOCH 2 NR 4 R 5 R 6 ; R 4 and R 5 together with the nitrogen atom form a piperidinium pyrrolidinium, or morpholinium ring, or, together with R 6 , form a pyridinium ring; R 6 is selected from H and alkyl; A - is an anion; the alkyl, alkoxy, and NHCO-alkyl substituents refer to such substituents having 1 to 4 carbon atoms.

Inventors

• 👤 Daniel Shaw James

Bibliographic Details