Basic azo dyes

Details Basic azo dyes Basic azo dyes

1976-04-13

1978-09-12

Warren, Charles F.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260155, 260156, 260158, 260162, C09B 4300, C09B 2936

Patent

active

041137183

ABSTRACT:
A cationic azo dye of the formula ##STR1## wherein n is 0 or 1, Z represents a divalent radical which completes the ring A to form a 5- or 6-membered ring which can carry a fused and substituted or unsubstituted benzene ring and contain nitrogen, oxygen and/or sulphur atoms as ring atoms, Y represents a substituted or unsubstituted alkyl or aryl radical or preferably a hydrogen atom, X.sup..crclbar. represents an anion, R.sub.1 represents a substituted or unsubstituted alkyl or aryl radical, R.sub.2 represents a substituted or unsubstituted alkyl or benzyl radical, R.sub.3 represents a substituted or unsubstituted alkyl, aralkyl or aryl radical, R.sub.4 represents a group of the formulae --CN, --CONR.sub.5 R.sub.6 and --COOR.sub.7, wherein R.sub.5 and R.sub.6 represent hydrogen atoms or substituted or unsubstituted alkyl, aralkyl or aryl radicals, and R.sub.7 represents a substituted or unsubstituted alkyl or aryl radical, and R.sub.8 represents a substituted or unsubstituted alkyl or benzyl radical. The new dyestuffs dye polyacrylonitrile fibers in fast yellow shades.

REFERENCES:
patent: 2913303 (1959-11-01), Baumann et al.
patent: 3829418 (1974-08-01), Raue et al.

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