CATIONIC STYRYLIC DYES, THEIR PRODUCTION AND THEIR USE FOR COLORING NATURAL AND SYNTHETIC CATIONICALLY COLORABLE SUBSTRATES

摘要

Cationic styryl dyestuffs of the general formula IMAGE wherein Q+designates a cationic grouping, X designates a connecting member, and R designates hydrogen, alkyl, alkenyl, aralkyl, aryl, a radical of the formula -X-Q+An-or, by ring closure with -X-Q+and the N atom, form a heterocyclic structure of the formula IMAGE where R2 is identical to hydrogen, alkyl, alkenyl or aralkyl, and R3 is identical to alkyl, or R2 and R3 together are identical to (CH2)4 or (CH2)5, and A designates a 1,4-arylene group, which optionally gives a fused ring system by ring closure with N-R, R1 designates hydrogen or alkyl, B designates a divalent, non-ionic aromatic and/or hetero-aromatic bridge, and An-designates an anion, and the cyclic anc acyclic substituents, connecting members and bridges can carry non-ionic radicals, are used for dyeing natural and synthetic cationically colorable substrates, preferably for dyeing paper.