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 1 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).
Claims8
Process for protecting reduction-sensitive dyes in the course of dyeing or printing fiber materials with dyes, characterized in that the dyeing or print process utilizes a compound of the formula (I) as well as mixtures thereof
- 11
- where
- A is a suitable counter-cation, or
- A is
- 12
- where
- R is hydrogen or linear or branched C1-4alkyl group,
- Y is hydrogen, a direct bond,
- 13
- where o, p, p′, q, q′, q″ and q′″ are independently 1, 2 or 3.
- Z is hydrogen or
- 14
- 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
- 15
Process according to anyone of the preceding claims, characterized in that a compound of the formula (I) or a mixture thereof where
- A is a group of the formula
- 16
- n is from 1 to 10,
- n′ is from 0 to 10 and
- Y is hydrogen, a direct bond,
- 17
- are used.
Process according to anyone of the preceding claims, characterized in that a compound of the formula (I) or a mixture thereof where
- n is from 1 to 5, n′ is from 0 to 5,
- Y is hydrogen or a direct bond, and
- m is 0 or 1
- are used.
Process according to anyone of the preceding claims, characterized in that the dyes are reactive dyes, direct dyes or vat dyes.
Printing and dyeing media, characterized in that they contain reduction protectants of the formula (I).
Dependencies are inferred from the claim text.