| 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.
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