| 摘要 |
Reactive dyes of the formula <IMAGE> (1) in which R1, R2, R3 and R4 independently of one another are hydrogen or substituted or unsubstituted C1-C4alkyl, X1 and X2 are halogen, B1 is an aromatic or aliphatic bridge member, or the radical of the formula -N(R2)-B1-N(R3)- is a piperazine radical, A1 is the radical of a monoazo, polyazo, metal complex azo, anthraquinone, phthalocyanine, formazan or dioxazine chromophore and, A2 is a radical of the formula <IMAGE> (2) in which D1 is substituted or unsubstituted phenyl or naphthyl, R5 and R6 independently of one another are hydrogen or substituted or unsubstituted C1-C4alkyl, alk is substituted or unsubstituted C2-C6alkylene and Z is vinyl or a radical -CH2-CH2-U1, and U1 is a leaving group, and the radicals A1 and A2 differ from one another, are particularly suitable for dyeing or printing fibre materials containing hydroxyl groups or containing nitrogen. Dyeings with good fastness properties are obtained with a high tinctorial yield.
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