Dyeing assistant and use thereof for dyeing or whitening synthetic nitrogen-containing fibre materials

Claim 2

A dyeing assistant for dyeing or whitening synthetic nitrogen-containing fibre materials, which assistant comprises (A) 10 to 30% by weight of a bisalkyl sulfosuccinate or sulfosuccinamide, (B) 25 to 50% by weight of an anionic surfactant, (C) 5 to 20% by weight of an amine oxide of the formula ##STR10## wherein R is C 8 -C 22 alkyl and R 1 is C 1 -C 4 alkyl, (D) 5 to 20% by weight of a water-soluble organic polar solvent selected from the group consisting of an aliphatic C 1 -C 6 -alcohol, an alkylene glycol, a monoalkyl ether of a glycol, a ketone, an ether, an acetal, pyridine, acetonitrile, γ-butyrolactone, N,N-dimethylformamide, N,N-dimethylacetamide, tetramethylurea and tetramethylene sulfone, and 0to 55% by weight of water.

Claim 3

An assistant according to claim 1 which contains water.

Claim 4

An assistant according to claim 2, which additionally comprises a thickener as component (E).

Claim 5

An assistant according to claim 1, wherein component (B) is an acid ester, or a salt thereof, of a polyadduct of 2 to 30 moles of ethylene oxide with 1 mole of a C 8 -C 22 fatty alcohol.

Claim 6

An assistant according to claim 4, wherein component (B) is a compound of formula Y--O--(CH.sub.2 CH.sub.2 O--).sub.m X, wherein Y is C 8 -C 22 alkyl, X is the sulfuric acid radical and m is 2 to 15.

Claim 7

An assistant according to claim 1, wherein component (D) is diacetone alcohol, isopropanol, dipropylene glycol, 1,3-butanediol, 1,2-pentanediol, diethylene glycol monobutyl ether, tetraethylene glycol monobutyl ether, or 1-methyl-2-pyrrolidone.

Claim 8

A process for dyeing or whitening synthetic nitrogen-containing fibre material which comprises dyeing or whitening said material in the presence of an assistant comprising (A) 10 to 30% by weight of a bisalkyl sulfosuccinate or sulfosuccinamide, (B) 25 to 50% by weight of an anionic surfactant, (C) 5 to 20% by weight on an amine oxide of the formula ##STR11## wherein R is C 8 -C 22 alkyl and R 1 is C 1 -C 4 alkyl, (D) 5 to 20% by weight of a water-soluble organic polar solvent selected from the group consisting of an aliphatic C 1 -C 6 -alcohol, an alkylene glycol, a monoalkyl ether of a glycol, a ketone, an ether, an acetal, pyridine, acetonitrile, γ-butyrolactone, N,N-dimethylformamide, N,N-dimethylacetamide, tetramethylurea and tetramethylene sulfone, and 0to 55% by weight of water.

Claim 9

A process for dyeing or whitening synthetic nitrogen-containing fibre material which comprises dyeing or whitening said material in the presence of an assistant comprising (A) 10 to 30% by weight of a bisalkyl sulfosuccinate or sulfosuccinamide, (B) 25 to 50% by weight of an anionic surfactant, (C) 5 to 20% by weight on an amine oxide of the formula ##STR11## wherein R is C 8 -C 22 alkyl and R 1 is C 1 -C 4 alkyl, (D) 5 to 20% by weight of a water-soluble organic polar solvent selected from the group consisting of an aliphatic C 1 -C 6 -alcohol, an alkylene glycol, a monoalkyl ether of a glycol, a ketone, an ether, an acetal, pyridine, acetonitrile, γ-butyrolactone, N,N-dimethylformamide, N,N-dimethylacetamide, tetramethylurea and tetramethylene sulfone, and 0to 55% by weight of water.

Claim 10

A process according to claim 7, wherein the assistant is used in an amount of 1 to 20 g per liter of dye liquor.

Claim 11

A process according to claim 8, wherein the dyeing or whitening is carried out in the pH range from 5 to 8.

Claim 12

A process according to claim 7, which comprises whitening the fibre material with a fluorescent whitening agent selected from the stilbene, pyrazoline, triazolyl or benzoxazolyl series.