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US 7,015,314 B2Granted
Formazan reactive dyes
AssigneeClariant Finance (BVI) Limited
InventorMarkus Gisler
Life of this patent
Estimating the term…
Abstract
This invention relates to novel fibre-reactive formazan dyes of the formula (I): where the symbols are each as defined in claim 1, their preparation, their use for dyeing and printing hydroxyl-containing or nitrogenous organic substrates and substrates dyed or printed with these compounds.
Claims10
Compounds of the formula (I):
- where
- P and P′ are independently H, C1-4-alkyl, C1-4-alkoxy, —SO3H,
- Q and Q′ are independently H or —SO3H,
- Me is Cu or Ni,
- X and Y are independently halogen atoms,
- m, n, o, r, s and t are independently 0, 1 or 2,
- u is 0 or 1,
- v is 1 or 2, subject to the proviso that the sum total of u and v is always less than 3,
- mixtures thereof and also their salts.
6 more elements
Dependencies are inferred from the claim text.