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US 6,284,876 B1Granted
Fiber-reactive disazo dyestuffs
AssigneeClariant International Ltd.
InventorMarkus Gisler
Life of this patent
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Abstract
The invention is concerned with compounds according to the formula (I) and salts thereof, or a mixture of such compounds or salts. These compounds are useful as fiber-reactive dyestuffs in dyeing and printing hydroxy-group-containing and nitrogen-containing organic substrates.
Claims6
A process for the preparation of compounds of formula (I)
- or a salt thereof, or a mixture of such compounds or salts, in which
- X1 is —SO2Z,
- X2 is —NRQ,
- Z is a group —CH═CH2 or —CH2CH2Y in which Y is a group which can be split off under alkaline conditions,
- each R is independently hydrogen, C1-4alkyl or C1-4hydroxyalkyl
- Q is
- or mixtures thereof which is characterized by coupling a compound of formula (II)
- with a diazotized amine of formula (II)
- in which X1 is the moiety —SO2Z and X2 is —NRQ, and optionally compounds with the moiety —SO2CH2CH2Y converting to compounds with the moiety —SO2CH═CH2.
6 more elements
A process for the preparation of printing inks comprising the use of a dyestuff or a mixture of dyestuffs according to formula (I):
- or salt thereof, or a mixture of such compound or salts, in which
- X1 is —SO2Z,
- X2 is —NRQ,
- Z is a group —CH═CH2 or —CH2CH2Y in which Y is a group which can be split off under alkaline conditions,
- each R is independently hydrogen, C1-4alkyl or C1-4hydroxyalkyl
- Q is
3 more elements
Dependencies are inferred from the claim text.