| abstract |
The fibre-reactive formazan dyes of the formula <IMAGE> (1) <IMAGE> where B is an aliphatic or sulfo-free aromatic bridge member, R is alpha , beta -dihalopropionyl, alpha -haloacryloyl or haloacetyl, T1 is halogen, X is halogen, C1-C4alkyl, C1-C4alkoxy, cyano or nitro, Y is -CO- or -SO2-, Z is nitrogen or -C-T2, T2 is halogen, hydrogen, C1-C4alkylthio, cyano, formyl or C1-C4alkylsulfonyl, m is 1, 2 or 3, n is 0, 1 or 2, qu is 0 or 1 and r and s are each eitehr 0 or 1 but never the same as each other, produce dyeings having good fastness properties on nitrogen-containing or hydroxyl-containing fibre materials. |