Reactive dyes containing a formazan dye radical and monoazo dye radical, a process for their preparation and their use
AssigneeCiba Specialty Chemicals Corporation
InventorHans Reichert
Life of this patent
Estimating the term…
Abstract
Reactive dyes of formula (1) wherein R1, R2, R3 and R4 are each independently of the others hydrogen or unsubstituted or substituted C1-C4alkyl, X1 and X2 are halogen, B is a C2-C12alkylene radical which may be interrupted by 1, 2 or 3 —O— members and is unsubstituted or substituted by hydroxy, A is a formazan radical of formula (2) or (3) D is a radical of formula (4) or (5) wherein m, n and R5 are as defined in the claims are suitable especially for dyeing or printing hydroxy-group-containing or nitrogen-containing fiber materials. Olive-green dyeings are obtained having good fastness properties and a high tinctorial yield.
Claims11
A reactive dye of formula (1)
- wherein
- R1, R2, R3 and R4 are each independently of the others hydrogen or unsubstituted or substituted C1-C4alkyl,
- X1 and X2 are halogen,
- B is a C2-C12alkylene radical which may be interrupted by 1, 2 or 3 —O— members and is unsubstituted or substituted by hydroxy,
- A is a formazan radical of formula (2) or (3)
- D is a radical of formula (4) or (5)
- wherein
- m is the number 1 or 2,
- n is the number 1, 2 or 3 and
- (R5)0-2 denotes from 0 to 2 identical or different substituents from the group C1-C4alkyl,
- C1-C4alkoxy, C2-C4alkanoylamino and halogen.
Dependencies are inferred from the claim text.