Methine-azo compounds containing cyclic cationic ammonium groups and open-chain coupling components

Abstract

Methine-azo compounds of the formula ##STR1## in which A is the complement to a heterocyclic 5- or 6-membered ring which has a quaternized N atom as a ring member, which can contain further hetero atoms and which can be substituted or/and be fused with carbocyclic or heterocyclic rings, R is hydrogen, cyano or C.sub.2 --C.sub.3 -alkylene which is bonded to an N atom of ring A to form a 5- or 6-membered ring, B is substituted or unsubstituted phenylene or naphthylene, X.sup..crclbar. is an anion and KK is the radical of an open-chain coupling component which contains active methylene groups, except that, if A is the complement to a pyridinium ring, KK cannot be the radical of acetoacetanilide which is unsubstituted or alkyl-substituted in the aniline ring. They are suitable for use as dyes for dyeing and printing cationically dyeable substrates, in particular paper.

Dependencies are inferred from the claim text.