| 摘要 |
The dyestuffs correspond to the formula 1c. In this formula: B: denotes H, C1-4-alkyl or -alkoxy, Y1 and Y2: one denotes H or sulpho, the other denotes H, C1-4-alkyl or -alkoxy, X1: denotes C1-4-alkyl or -alkoxy, X2: denotes H or sulpho, X3: denotes H, C1-4-alkyl or sulpho R1 and R2: denote benzyl, sulphobenzyl or C1-4-alkyl which is optionally substituted by OH or CN. At least one of the non-fused benzene rings contains a radical Q, bonded via NH, of a heterocyclic compound which contains at least one substituent reactive with cellulose bonded to a ring carbon atom. The dyestuffs altogether contain at least 2 sulpho groups. The dyestuffs are prepared by reacting a compound of the formula Ic, in which at least one of the non-fused benzene rings contains an NH2 group, with a compound Q-halogen. The dyestuffs dye polyamide and in particular cellulose materials bright blue or reddish-blue in the presence of alkaline agents. The dyeings are washfast. <IMAGE> |
