Pyridyl-azo-indolyl cationic dyes

Details Pyridyl-azo-indolyl cationic dyes Pyridyl-azo-indolyl cationic dyes

1977-03-17

1979-02-06

Curtis, Allen B.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C09B 2906

Patent

active

041383966

ABSTRACT:
Cationic azo dyes of formula ##STR1## wherein R represents a substituted or unsubstituted alkyl radical, each of R.sub.1 and R.sub.2 represents hydrogen or a substituted or unsubstituted alkyl or aryl radical, X.sup..crclbar. is the charge equivalent of an anion, and wherein the benzene ring A and the pyridine ring B are unsubstituted or substituted by non-ionogenic substituents, and wherein the cationic component does not contain any groups which exhibit acid dissociation in water.

REFERENCES:
patent: 2864813 (1958-12-01), Bossard
patent: 2893816 (1959-07-01), Tsang et al.
patent: 3117960 (1964-01-01), Illy
patent: 3526619 (1970-09-01), Haubrich

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