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AssigneeCiba Specialty Chemicals Corporation
InventorsJorg Binz, Bruno Saladin, Martin Jollenbeck
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The present invention relates to novel dyeing assistant preparations comprising, as component (a), at least one amine oxide of the formula ##STR1## in which R is an aliphatic radical having 8 to 24 carbon atoms and R.sub.1 is an aliphatic radical which is unsubstituted or substituted by hydroxyl and has 1 to 24 carbon atoms, preferably 1 to 6 carbon atoms, as component (b), at least one compound of the formula R.sub.2 --U--(R.sub.3 --O).sub.m --W (2), in which R.sub.2 is an aliphatic radical having 8 to 24 carbon atoms, R.sub.3 is alkylene having 2 to 4 carbon atoms, U is --O-- or ##STR2## in which Z is a direct bond, (R.sub.3 --O)).sub.r or C.sub.1 -C.sub.6 alkylene and W.sub.1 is hydrogen or C.sub.1 -C.sub.6 alkyl which is unsubstituted or substituted by hydroxyl, carboxyl, isocyanato, phenyl, benzyloxymethylene or phenethyloxymethylene, m and r independently of one another are a number from 2 to 25, (R.sub.3 --O).sub.m is m identical or different radicals (R.sub.3 --O) and (R.sub.3 --O).sub.r is r identical or different radicals (R.sub.3 --O), and W is hydrogen or C.sub.1 -C.sub.6 alkyl which is unsubstituted or substituted by hydroxyl, carboxyl, isocyanato, phenyl, benzyloxymethylene or phenethyloxymethylene, and, as component (c), an organic solvent, and to their use as dyeing assistants for dyeing wool.
A method of dyeing wool, which comprises dyeing wool in a dyebath which contains, based on the weight of the wool material to be dyed, 0.1 to 10 percent by weight of a dyeing assistant preparation, which preparation comprises,
Dependencies are inferred from the claim text.