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US 6,926,746 B2Granted
Protection of reduction-sensitive dyes
AssigneeClariant Finance (BVI) Limited
InventorMartin Stumpf
Life of this patent
Estimating the term…
Abstract
The invention relates to a process for protecting reduction-sensitive dyes in the course of dyeing or printing fiber materials with dyes using a compound of the formula (I) or a mixture thereof where the substituents are each as defined in the claims; novel compounds of the formula (I) and printing and dyeing media containing compounds of the formula (I).
Claims6
Process for protecting reduction-sensitive dyes in the course of dyeing or printing fiber materials with dyes, where a dyeing or a print process utilizes a compound of the formula (I) as well as mixtures thereof
- where
- A is a quaternary ammonium ion, or
- A is
- where
- R is hydrogen or linear or branched C1-4 alkyl group,
- Y is hydrogen, a direct bond,
- where o, p, p′, q, q′, q″ and q′″ are independently 1, 2 or 3,
- Z is hydrogen or
- where X is a direct bond or a C1-4alkylene group,
- n and n′ are each a natural number subject to the proviso that n and n′ are independent of each other and n is never 0,
- m is 0 when Y is hydrogen, is 1 when Y is a direct bond, is 2 when Y is
8 more elements
Dependencies are inferred from the claim text.