EP0057398B1 - Process for the post-treatment of dyed, shrink-proofed fibrous material - Google Patents

Description

in der

• R₁ und R₂ unabhängig voneinander Wasserstoff oder einen C₁-C₄-Alkylrest und
• R einen C₁-₁₅-Alkyl-, Cycloalkyl-, Aralkyl- oder Arylrest oder eine der Hydroxyalkylgruppen
  
  bedeuten, mit der Maßgabe, daß die Menge an N-2-Hydroxyalkylaminen, in denen R für eine Hydroxyalkylgruppe steht, nicht mehr als 20 Gewichtsprozent der eingesetzten Hydroxyalkylamine beträgt, gegebenenfalls durch Co-Kondensation mit Polyolen der Formel
  
  in der
• A einen 2-, 3- oder 4-wertigen aliphatischen, cycloaliphatischen, araliphatischen oder aromatischen Rest bedeutet und
• n eine Zahl von 2 bis 4 ist,

und gegebenenfalls durch Quaternierung erhalten werden.The invention relates to a process for the aftertreatment of dyeings on felt-free, keratin-containing fiber materials. The process consists in treating these fiber materials, in which the felt-free finish has been carried out before or after dyeing, with aqueous liquors which contain polyethers by the condensation of N-2-hydroxyalkylamines of the formula

in the

• R ₁ and R ₂ independently of one another hydrogen or a C ₁ -C ₄ alkyl radical and
• R is a C ₁ - ₁₅ alkyl, cycloalkyl, aralkyl or aryl radical or one of the hydroxyalkyl groups
  
  mean, with the proviso that the amount of N-2-hydroxyalkylamines in which R represents a hydroxyalkyl group is not more than 20 percent by weight of the hydroxyalkylamines used, optionally by co-condensation with polyols of the formula
  
  in the
• A represents a 2-, 3- or 4-valent aliphatic, cycloaliphatic, araliphatic or aromatic radical and
• n is a number from 2 to 4,

and optionally obtained by quaternization.

• als C₁-C₁₅-Alkylreste der Methyl-, Ethyl-, Propyl-, n-Butyl-, sec.-Butyl-, 2-Ethylhexyl-, Decyl- und Dodecylrest ;
• als Cycloalkylreste vor allem der Cyclohexylrest und durch C₁-C₄-Alkylgruppen substituierte Cyclohexylreste, wie der Methylcyclohexyl-, Ethylcyclohexyl-, Butylcyclohexyl-, Dimethylcyclohexyl- und der Diethylcyclohexylrest ;
• als Aralkylreste insbesondere der gegebenenfalls durch C₁-C₄-Alkyl substituierte Benzylrest ;
• als Arylreste vor allem der gegebenenfalls durch C₁-C₄-Alkyl substituierte Phenylrest wie der Kresyl-, Xylyl-, Ethylphenyl- und tert.-Butylphenylrest.

For R, for example:

• as C ₁ -C ₁₅ alkyl radicals the methyl, ethyl, propyl, n-butyl, sec-butyl, 2-ethylhexyl, decyl and dodecyl radical;
• as cycloalkyl radicals especially the cyclohexyl radical and cyclohexyl radicals substituted by C ₁ -C ₄ alkyl groups, such as the methylcyclohexyl, ethylcyclohexyl, butylcyclohexyl, dimethylcyclohexyl and diethylcyclohexyl radical;
• as aralkyl radicals, in particular the benzyl radical optionally substituted by C ₁ -C ₄ alkyl;
• as aryl radicals, especially the phenyl radical optionally substituted by C ₁ -C ₄ alkyl, such as the cresyl, xylyl, ethylphenyl and tert-butylphenyl radical.

For R ₁ and R ₂ , the methyl, ethyl, propyl, n-butyl and sec-butyl radicals may be mentioned as C ₁ -C ₄ alkyl radicals.

In preferred compounds (I) R is C _i -C ₄ alkyl or cyclohexyl and R ₁ and R _{2 are} hydrogen or methyl.

worin

• x für 2 oder 3 und
• y für 1-3 stehen,

besonders zu nennen.As aliphatic radicals A are C ₂ -C ₄ alkylene radicals or radicals of the formula

wherein

• x for 2 or 3 and
• y stand for 1-3,

to be particularly mentioned.

Preferred cycloaliphatic, araliphatic and aromatic radicals A are derived from the radicals mentioned as examples under R.

• aliphatische Polyole, z. B. Diole, wie Ethylenglykol, Propylenglykol, Butylenglykol, Diethylenglykol, Triethylenglykol, Tetraethylenglykol ;
• Triole wie Glycerin, Trimethylolethan, Trimethylolpropan ;
• Tetraole wie Pentaerythrit ;
• cycloaliphatische Diole, wie 1,4-Dioxycyclohexan ;
• araliphatische Diole, wie 1,4-Bis-methylolbenzol, 1,4-Di-ß-hydroxyethoxy-benzol, 4,4'-Di-ß-hydroxyethoxydiphenylether, 4,4'-Di-ß-hydroxyethoxydiphenylsulfid, 4,4'-Di-ß-hydroxyethoxybenzophenon, 2,2-Bis-(4-ß-hydroxyethoxyphenyl)-propan.,

The following may be mentioned as polyols (II):

• aliphatic polyols, e.g. B. diols, such as ethylene glycol, propylene glycol, butylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol;
• Triols such as glycerin, trimethylolethane, trimethylolpropane;
• Tetraols such as pentaerythritol;
• cycloaliphatic diols such as 1,4-dioxycyclohexane;
• araliphatic diols, such as 1,4-bis-methylolbenzene, 1,4-di-ß-hydroxyethoxy-benzene, 4,4'-di-ß-hydroxyethoxydiphenyl ether, 4,4'-di-ß-hydroxyethoxydiphenyl sulfide, 4,4 ' -Di-β-hydroxyethoxybenzophenone, 2,2-bis (4-β-hydroxyethoxyphenyl) propane.,

It has proven expedient to choose the amount of polyols condensed in not higher than 25 percent by weight, based on the weight of the polyether.

The average molecular weight of the polyethers to be used according to the invention should be between 500 and 20,000, preferably 1,000 to 15,000.

The polyethers to be used according to the invention are linear or slightly branched polyethers. The linear polyethers can be prepared by known methods by condensation of N-2-hydroxyalkylamines of the formula I in the presence of acidic catalysts, e.g. B. H ₃ P0 ₃ , at elevated temperatures, e.g. B. 150-280 ° C can be obtained. In order to arrive at branched polyethers, the diols containing tertiary amino groups are condensed together with triols containing tertiary amino groups, ie N-2-hydroxyalkylamines of the formula I in which R represents one of the β-hydroxyalkyl groups indicated. In order to avoid crosslinking, however, the amount of triols in the condensation mixture should not be more than 20 percent by weight, preferably 2-15 percent by weight.

The polyethers to be used according to the invention are known, for example, from GB-A-1 107 819 and DE-A-2 060 572.

Examples of β-hydroxyalkylamines of the formula (I) which may be mentioned are the N-di- (2-hydroxyalkyl) amines as used in the addition of ethylene, propylene and butylene oxide or mixtures of these alkylene oxides to primary aliphatic, cycloaliphatic, araliphatic and aromatic amines are formed.

Representatives of these N-di- (2-hydroxyalkyl) amines are e.g. B.: N, N-bis- (2-hydroxyethyl) -N-methylamine, N, N-bis- [2-hydroxypropyl- (1) j-methylamine, N, N-bis- [2-hydroxy-butyl- (1)] - methylamine, N, N-bis (2-hydroxyethyl) -N-isopropylamine, N, N-bis (2-hydroxyethyl) -Nn-butylamine, N, N-bis- [2-hydroxypropyl (1)] - N-sec-butylamine, N, N-bis (2-hydroxyethyl) cyclohexylamine, N, N-bis (2-hydroxyethyl) -N-benzylamine, N, N-bis- (2nd -hydroxyethyl) -N- (4-methylbenzyl) amine, N, N-bis (2-hydroxyethyl) aniline, N, N-bis- [2-hydroxypropyl- (1)] aniline, N, N- Bis- (2-hydroxyethyl) -3-methylaniline, N, N-bis (2-hydroxyethyl) -4-tert-butylaniline.

Triethanolamine, triisopropanolamine and tributanolamine may be mentioned in particular as representatives of the triols used to prepare the branched polyethers.

It has been shown that the quaternization products of the polyethers to be used according to the invention frequently have a stronger effect in improving the fastness properties than the polyethers.

The quaternization is carried out in a manner known per se by reacting the polyethers optionally dissolved or suspended in alcohol or alcohol / water mixtures with known alkylating agents, such as dimethyl sulfate or diethyl sulfate; p-Toluenesulfonic acid alkyl esters, e.g. B. methyl p-toluenesulfonate; Alkyl halides, e.g. B. methyl iodide or ethyl bromide; Chloroacetamide, halocarboxylic acid salts, halocarboxylic acid esters, alkanesulfones or benzyl chloride.

It is not necessary to completely quaternize the polyether, but it is technically particularly favorable to quaternize 0-20% of the basic nitrogen atoms of the polyether.

The amounts in which the polyethers to be used according to the invention are added to the aftertreatment baths can vary within wide limits. In general, an addition of 0.05-2%, preferably 0.1-1%, by weight, based on the weight of the fiber materials, has proven useful.

The aftertreatment of the textile material is expediently carried out in such a way that the material which has already been finished and dyed in a felt-free manner is introduced into an aqueous liquor which contains the polyethers to be used according to the invention and has a pH between 6 and 9, preferably 7- 8. The temperature of the treatment bath is raised to 50-80 ° C. in the course of 20-30 minutes and left there for 5-15 minutes. The material is then rinsed with cold water, dewatered and dried.

As described above, the aftertreatment can be carried out by the exhaust process or else continuously or semi-continuously by padding or spraying with subsequent exposure to heat.

The felt-free finish can be done by various known methods, e.g. B. by the HERCOSETT method. These processes, also known as superwashing equipment, are chlorination processes and processes in which the fiber is coated with a resin, e.g. B. a polyurethane, polyacrylic, melamine, polyalkyleneimine / epichlorohydrin or polyamide / epichlorohydrin resin is treated.

Methods of this type are described, for example, in M. Bahra, Journal for the Whole Textile Industry, 1964, No. 6, pp. 519-522; G. Meier, textilpraxis international, 1975, volume 1, pp. 76-79, and volume 3, pp. 304-306; R.R.D. Holt, Journal of the Society of Dyers and Colorists, 1975, No. 2, pp. 38-44.

The effect of the polyethers to be used according to the invention can be increased from case to case by using non-ionic, cation-active or amphoteric, surface-active substances. Such substances are, for example, ethylene and / or propylene oxide adducts of fatty amines, which can be quaternized and / or sulfated. They are known to those skilled in the art as leveling aids for wool dyes.

The amount of such products used is 50-100%, preferably 70-80%, of the amount of the polyethers to be used according to the invention. i

With the aid of the method according to the invention, the fastness properties, in particular the wet fastness properties such as the sweat fastness according to IWS-TM 174 (test method for alkaline sweat fastness) and the wash fastness according to IWS-TM 193 (test method for fastness to washing) are considerably improved.

As dyes come the dyes usually used for dyeing keratin fibers, z. B. acid dyes, 1: 2 metal complex dyes, which act as water-solubilizing groups such as sulfonic acid or carboxylic acid groups or also sulfonamide or alkylsulfone residues, and reactive dyes in question. They are described in more detail in the Color Index. Dyes of this type, which otherwise have good fastness properties, result in less real dyeings on materials which have been treated with keratin and contain no felt, particularly in the case of deep shades.

It has surprisingly been found that the deteriorated fastness properties of these dyeings obtain an astonishingly high fastness level when they are aftertreated with the polyethers to be used according to the invention.

The parts given in the examples and manufacturing instructions are parts by weight, unless stated otherwise. The dye numbers given refer to the information in Color Index, 3rd edition, volume 5 (1971).

Preparation of the polyethers used in the examples.

Polyether A

1,500 parts of di-β-hydroxyethylcyclohexylamine were condensed in the presence of 15 parts of H ₃ PO _{3 for} 3 hours under nitrogen at 220-230 ° C. The reaction mixture was then heated to 220 ° C. for 1 hour under reduced pressure (16 mbar) in order to remove the volatile constituents. The resulting polyether is a yellow water-insoluble syrup (average molecular weight: 4460, OH number: 25).

Polyether B

The solution of 150 parts of polyether A in 200 parts by volume of methanol was mixed with 82 parts of dimethyl sulfate (0.75 mol of dimethyl sulfate per mole of basic amino group) at the boiling point. The reaction mixture was refluxed for 3 hours. The solvent was then distilled in vacuo. The quaternization product remains as a yellow water-soluble syrup.

Polyether C

Polyether C was prepared analogously to polyether B, except that only 54 parts of dimethyl sulfate (0.5 mol of dimethyl sulfate per mole of basic amino group) were used instead of the 82 parts of dimethyl sulfate for the quaternization. The quaternization product remains as a yellow water-soluble syrup.

Polyether D Starting product:

beschreiben.First, 500 parts of N, N-di- (β-hydroxyethyl) -N-cyclohexylamine in the presence of 7.5 parts of H ₃ P0 _{3 were} used to produce the polyether A to a polyether with an OH number 8.8 corresponding to an average Molecular weight condensed 13000. The polyether can be represented by the formula

describe.

85 parts of this polyether were suspended in 80 parts by volume of methanol, and 19 parts of dimethyl sulfate (0.3 mol of dimethyl sulfate per mole of basic amino group) were added at the boiling point. After heating at the reflux temperature for two hours, the solvent was distilled off. The quaternized polyether was obtained in the form of a yellow water-soluble syrup.

Polyether E.

1,900 parts of N, N-di (-ß-hydroxyethyl) -N-butylamine were condensed in the presence of 19 parts of H ₃ PO ₃ under nitrogen at 200 ° C. for 9 hours. The reaction mixture was then heated to 200 ° C. for 2 hours under reduced pressure (16 mbar) in order to remove the volatile constituents. The resulting polyether is a water-insoluble, slightly reddish viscous oil (average molecular weight: 5,000; OH number: 22).

Polyether F

700 parts of N, N-di- (β-hydroxypropyl) -N-methylamine were condensed in the presence of 10.5 parts of H ₃ PO ₃ under nitrogen at 220 ° C. for 6 hours. The reaction mixture was then heated to 220 ° C. for 1 hour under reduced pressure (16 mbar) in order to remove the volatile constituents. The resulting polyether is a slightly reddish colored water-soluble oil (average molecular weight: 1,340; OH number: 84).

Polyether G. Starting product:

beschreiben.First, 500 parts of N, N-di- (β-hydroxyethyl) -N-cyclohexylamine in the presence of 7.5 parts of H ₃ PO _{3 were converted} into a polyether with an OH number 14 corresponding to an average molecular weight of 8,000, analogously to the preparation of polyether A. condensed. The polyether can be represented by the formula

describe.

The solution of 338 parts of this polyether in 400 parts by volume of methanol was esterified at the boiling point with 151 parts of methyl chloroformate (0.8 mol of chloroformate per mole of basic amino group). After heating at the reflux temperature for 3 hours, the solvent was distilled off in vacuo. The quaternization product was obtained in the form of a water-soluble yellowish oil.

Polyether H Starting product:

1,800 parts of N, N-di- (β-hydroxyethyl) -N-cyclohexylamine, 200 parts of 2,2-di- [4- (β-hydroxyethoxy) phenyl] propane were added in the presence of 20 parts of H ₃ PO ₃ Condensed for 5 hours under nitrogen at 220-230 ° C. The reaction mixture was then heated to 220 ° C. for 1 hour under reduced pressure (16 mbar) in order to remove the volatile constituents. The polyether obtained as a residue is a yellow syrup (average molecular weight: 8,000; OH number: 14; content of basic amino groups: 5.16 equivalents / kg polyether).

The solution of 300 parts of the polyether in 300 parts by volume of methanol was added dropwise at the boiling point with 158 parts of dimethyl sulfate (0.8 mol of dimethyl sulfate per mole of basic amino group). The reaction mixture was heated to reflux temperature for 2 hours. The solvent was then distilled off in vacuo. The quaternization product remains as a slightly yellowish water-soluble syrup.

Polyether I Starting product 1:

1,385 parts of N, N-di- (β-hydroxypropyl) -N-methylamine were condensed in the presence of 62 parts of H ₃ PO _{3 for} 5 hours under nitrogen at 210-220 ° C. The reaction mixture was then heated to 210 ° C. for 1 hour under reduced pressure (16 mbar) in order to remove the volatile constituents. The resulting polyether is a slightly reddish viscous water-soluble oil (average molecular weight: 1 290; OH number: 86; content of basic amino groups: 7 equivalents / kg polyether).

beschreiben.The polyether can be represented by the formula

describe.

Starting product 2:

710 parts of this polyether and 710 parts of N, N-di- (β-hydroxyethyl) -N-cyclohexylamine were condensed in the presence of 15 parts of H ₃ PO ₃ under nitrogen at 220 ° C. for 10 hours. The reaction mixture was then heated to 220 ° C. for 3 hours under reduced pressure (16 mbar) to remove the volatile constituents. The mixed polyether obtained as a residue is a water-insoluble, orange syrup (average molecular weight: 6,150; OH number: 18; content of basic amino groups: 6.8 equivalents / kg polyether).

The solution of 500 parts of the mixed polyether in 500 parts by volume of methanol was added dropwise at the boiling point with 128 parts of dimethyl sulfate (0.3 mol of dimethyl sulfate per mole of amino group). The reaction mixture was heated to reflux temperature for 6 hours. The solvent was then distilled off in vacuo. The quaternization product remains as a water-soluble yellow syrup.

Polyether K Starting product:

360 parts of N, N-di- (β-hydroxyethyl) -N-cyclohexylamine and 40 parts of triethanolamine were condensed in the presence of 1.5 parts of H ₃ P0 ₃ under nitrogen at 220 ° C. for 5 hours. The reaction mixture was then heated to 170 ° C. for 1 hour under reduced pressure (16 mbar) in order to remove the volatile constituents. The branched mixed polyether obtained as residue is a slightly yellowish, water-insoluble syrup (OH number: 108; content of basic amino groups: 6.3 equivalents / kg polyether).

200 parts of the polyether were suspended in 300 parts by volume of methanol and 79 parts of dimethyl sulfate (0.5 mol) of dimethyl sulfate per mole of amino group were added at the boiling point. After heating at the reflux temperature for 3 hours, the solvent was distilled off in vacuo. The quaternized polyether was obtained in the form of a water-soluble syrup.

example 1

• 1,0 g des Farbstoffes C.I. Acid Blue 49 ( = Nr. 62 095)
• 2,0 g Natriumsulfat kalz.
• 1,5 g Essigsäure (60 %)
• 0,5 g des Egalisierhilfsmittels folgender Formel
  
  enthält.

Yarns made of wool which have been treated with HERCOSETT 57 «Superwash (chlorination and treatment with an adipic acid / diethylenetriamine-epichlorohydrin reaction product) are treated in a liquor ratio of 1:20 at room temperature for 15 minutes with a dye liquor which is in liters

• 1.0 g of the dye CI Acid Blue 49 (= No. 62 095)
• 2.0 g sodium sulfate calc.
• 1.5 g acetic acid (60%)
• 0.5 g of the leveling aid of the following formula
  
  contains.

• 0,15 g des Polyethers B
• 0,15 g des für das Färben verwendeten, amphoteren Egalisierhilfsmittels und
• 0,25 g einer 25 %igen Ammoniaklösung

enthält (pH = ca. 8). Dann wird die Färbung gespült, entwässert und getrocknet.The dyebath is heated to boiling within 60 minutes and dyed at this temperature for 60 minutes. The dyeing is then rinsed and after-treated at 50 ° C. for 20 minutes with a liquor in liters

• 0.15 g of polyether B
• 0.15 g of the amphoteric leveling agent used for dyeing and
• 0.25 g of a 25% ammonia solution

contains (pH = approx. 8). Then the dyeing is rinsed, dewatered and dried.

The authenticity tests which are carried out in this post-treated dyeing show that the level of authenticity has been significantly improved by the post-treatment, so that the IWS specifications (IWS-TM 193, IWS-TM 174) are easily achieved.

Example 2

• 0,2 g des Polyethers A
• 0,15 g des in Beispiel 1 beschriebenen Egalisierhilfsmittels
• 0,25 g einer 25 %igen Ammoniak-Lösung

enthält. Anschließend wird die Färbung gespült, entwässert und getrocknet.The HERCOSETT-finished wool yarns are dyed as described in Example 1 and then treated at 50 ° C. for 15 minutes with a liquor in liters

• 0.2 g of polyether A
• 0.15 g of the leveling aid described in Example 1
• 0.25 g of a 25% ammonia solution

contains. The dyeing is then rinsed, dewatered and dried.

A significant improvement in the fastness properties of the dyeing is obtained in this way.

Example 3

• 1 g des Farbstoffes C.I. Acid Red 296 ( = Nr. 15 675)
• 1 g Natriumsulfat kalz.
• 2,5 g Essigsäure (60 %)
• 0,6 g des in Beispiel 1 verwendeten Egalisierhilfsmittels

enthält. Anschließend wird die Färbeflotte innerhalb von 60 Minuten zum Kochen erhitzt und 60 Minuten bei dieser Temperatur gehalten. Nach dem Spülen wird die Färbung bei 50 °C während 15 Minuten mit einer Flotte nachbehandelt, die im Liter

• 0,4 g des Polyethers D
• 0,4 g des in Beispiel 1 beschriebenen Egalisierhilfsmittels

enthält. Anschließend wird die Färbung gespült, entwässert und getrocknet. Die Färbung weist ein wesentlich erhöhtes Echtheitsniveau auf.Wool combs that were previously equipped with HERCOSETT 57 are placed in a liquor ratio of 1:10 at room temperature in a dye bath, which is in liters

• 1 g of the dye CI Acid Red 296 (= No. 15 675)
• 1 g sodium sulfate calc.
• 2.5 g acetic acid (60%)
• 0.6 g of the leveling aid used in Example 1

contains. The dye liquor is then heated to boiling within 60 minutes and kept at this temperature for 60 minutes. After rinsing, the dyeing is aftertreated at 50 ° C for 15 minutes with a liquor in liters

• 0.4 g of the polyether D
• 0.4 g of the leveling aid described in Example 1

contains. The dyeing is then rinsed, dewatered and dried. The coloring has a significantly increased level of authenticity.

Example 4

• 1,6 g des Farbstoffes C.I. Acid Green 50 ( = C.I. 44 090)
• 0,75 g Natriumsulfat kalz.
• 2,0 g Essigsäure (60 %)
• 0,5 g des Umsetzungsproduktes aus 1 Mol N-Methylstearylamin und 30 Mol Ethylenoxid

enthält.Wool yarn finished on bobbins, finished with a felt-free finish, is dyed in a liquor ratio of 1:15, as described in Example 1, but using a dye liquor which is in liters

• 1.6 g of the dye CI Acid Green 50 (= CI 44 090)
• 0.75 g sodium sulfate calc.
• 2.0 g acetic acid (60%)
• 0.5 g of the reaction product from 1 mol of N-methylstearylamine and 30 mol of ethylene oxide

contains.

Aftertreatment is carried out as described in Example 1. The dyeing obtained in this way has very good fastness properties.

Example 5

• 1,2 g des roten Farbstoffes der FR-A-1 389345, Beispiel 1
• 1,0 g Natriumsulfat kalz.
• 2,0 g Essigsäure (60 %)
• 0,4 g eines Hilfsmittelgemisches bestehend aus 50 Teilen des Umsetzungsproduktes aus 1 Mol N-Methyl-stearylamin und 20 Mol EO und 50 Teilen des Umsetzungsproduktes aus 1 Mol N-Methylstearylamin und 35 Mol EO

enthält. Man verfährt sowohl beim Färben als auch beim Nachbehandeln wie in Beispiel 1 beschrieben, jedoch mit dem Unterschied, daß man bei der Nachbehandlung anstelle des Polyethers B 0,14 g des Polyethers K einsetzt.Wool yarn skeins equipped with HERCOSETT 57 are introduced into a dye liquor at room temperature in a liquor ratio of 1:25, in liters

• 1.2 g of the red dye of FR-A-1 389345, Example 1
• 1.0 g sodium sulfate calc.
• 2.0 g acetic acid (60%)
• 0.4 g of an auxiliary mixture consisting of 50 parts of the reaction product from 1 mol of N-methylstearylamine and 20 mol of EO and 50 parts of the reaction product from 1 mol of N-methylstearylamine and 35 mol of EO

contains. Both dyeing and aftertreatment are carried out as described in Example 1, with the difference that 0.14 g of polyether K is used in the aftertreatment instead of the polyether B.

Here, too, a substantial improvement in the fastness properties of the dyeing is achieved.

Claims (5)

1. Process for the after-treatment of dyed keratin-containing fibre materials which have an anti- felting finish, using aqueous liquors, characterised in that the liquors contain polyethers which are obtained by condensation of N-2-hydroxyalkylamines of the formula

in which

R₁ and R₂ independently of one another denote hydrogen or a C₁-C₄-alkyl radical and

R denotes a C₁-C₁₅-alkyl, cycloalkyl, aralkyl or aryl radical, or one of the hydroxyalkyl groups

with the proviso that the quantity of N-2-hydroxyalkylamines in which R represents a hydroxyalkyl group is not more than 20 per cent by weight of the hydroxyalkylmaines employed,

if appropriate by co-condensation with polyols of the formula

in which

A denotes a 2-valent, 3-valent or 4-valent aliphatic, cycloaliphatic, araliphatic or aromatic radical, and

n is a number from 2 to 4,

and, if appropriate, by quaternisation.

2. Process according to Claim 1, characterised in that the polyethers have a molecular weight of 500-20,000.

3. Process according to Claim 1, characterised in that the polyethers are prepared from N-2-hydroxyalkylamines of the formula of Claim 1, wherein R represents C_i-C₄-alkyl or cyclohexyl and R₁ and R₂ represent hydrogen or methyl.

4. Process according to Claim 1, characterised in that the liquors contain 0.05-2 % by weight of the polyether.

5. Process according to Claim 1, characterised in that the liquors contain, in addition to the polyether, a non-ionic, cationic or amphoteric levelling auxiliary for wool.