EP0214580A2 - Process and agent for the single-bath reoxidation and soaping of vat or sulphur vat dyeings - Google Patents

Abstract

The alkaline reoxidation of vat and sulfur vat dyes using hydrogen peroxide can only be controlled with difficulty and kept constant. Through the use of agents that release hypochlorite in the heat, e.g. p-Toluenesulfonic acid-N-chloramide sodium, at pH values above 8, combinations of these dyes with differing oxidation behavior can be reoxidized reliably according to the invention. At the same time, there was an opportunity to combine the necessary soaping process with reoxidation.

Description

The present invention relates to a method for single-bath reoxidation and soaping of dyeings with vat and / or sulfur vat dyes (C.I. Vat Dyes), which have previously been applied in reduced form to a textile material containing cellulose fibers and fixed there, from an alkaline medium. This invention also relates to an oxidizing and re-soaping agent for carrying out the claimed process.

It is generally known that when dyeing cotton with vat and / or sulfur vat dyes, these colorants for application to the goods first have to be veiled and then developed there after being drawn up and fixed by reoxidation. Subsequent soaping of the dye material treated in this way is essential to obtain optimal fastness properties and the final color of such dyeings.

Over time, various reoxidation processes have now been developed for the development of the two previously mentioned dye categories - both for carrying out in an acidic and in an alkaline medium - which all have their specific advantages, but also their typical disadvantages.

The development of more and more effective continuous processes for dye application meant that the trend towards reoxidation techniques also shifted towards more intensely acting oxidants - from which it followed that the sensitivity of the dye individuals to such oxidizing substances increasingly came to the fore and made even more precise monitoring of the reoxidation process necessary. This constraint turned out to be particularly useful for combination dyeings with differently colored dyes.

Another problem with regard to the functionality of the common reoxidation measures arose when the use of chromium salts as oxidants had to be avoided for environmental reasons.

When using the remaining oxidizing agents, which are effective in the alkaline range, such as hydrogen peroxide, peroxides or perborates, sodium chlorite or hypochlorite, it was found that these either cause difficulties in the dosage or adversely affect the nuance. In some cases there are even reductions in authenticity properties, e.g. which causes wet fastness properties.

In the German laid-open documents DE-A1-33 12 162 and DE-A1-33 38 267, however, it is probably already explained that dyeings with sulfur dyes, which have been applied to cellulose in the reduced state, for dye development of the oxidation effect of p-toluenesulfonic acid -N-Chloramide sodium in the alkaline range. However, the uniformity of the colorant used removes the reoxidation process described from the need to take into account any different criteria regarding the vulnerability of the leuco compound in the course of this treatment step.

The prevailing general objective in practice of using dyes from different ranges for dyeing in this field of work for price reasons - i.e. also with different reoxidation behavior - thus provides the task in question for the invention in question, a reoxidation process for developing the fiber to design each dye in leuco form, which can be used uniformly, does not cause environmental pollution, eliminates the disadvantages of the known processes for this and is also economical.

This object is achieved according to the invention in that the textile material treated with the above dyes alone or in combination with one another for dye development of the oxidizing action of an aqueous solution of chemicals which release hypochlorite in the heat at pH values above 8 and a temperature between 15 ° C and boiling point of the liquor is suspended and, at the same time as the oxidation in the same bath, carries out or initiates the soaping process with the aid of preferably anionic surfactants which are insensitive to hypochlorite. This can be done both continuously and discontinuously.

According to the invention, N-chlorinated organic sulfonamides such as N-chloro-aryl- or -alkylaryl-sulfonamides or N-chlorinated isocyanuric acids are suitable representatives of such compounds which split off hypochlorite in the heat and are able to give off positively charged chlorine during the oxidation process in question. In particular, in this regard, the sodium salts of p-toluenesulfonic acid-N-chloramide, benzenesulfonic acid-N-chloramide, 1-benzenesulfonic acid-N-chloramide-3-carboxylic acid or o-toluenesulfonic acid-N-chloramide, as well as the corresponding dichloro compounds such as p -Toluenesulfonic acid-N, N-dichloramide and dichloroisocyanuric acid, individually or in mixtures with each other, to give equivalent color results. With the substances just listed, dyeing practice has inexpensive, physiologically harmless and, with its end products, wastewater-free oxidizing agents available for the development of vat and sulfur dyes. Your dosage is easy and in terms of compliance Color consistency is not a problem. Such compounds are described, inter alia, in Ullmann's Encyclopedia of Industrial Chemistry, 4th edition, volume 9, pages 384 to 392 (especially pages 388 to 389) and in Kirk-Othmer, Encyclopedia of Chemical Technology, Third Edition, Volume 5, pp. 565-580 (especially pp. 574-575).

Anionic, hypochlorite-insensitive surfactants, such as e.g. Oleyl methyl taurine or oleyl isethionic sodium, among others, optionally mixed with such non-ionic type auxiliaries. According to the invention, these surfactants are used together with the above-mentioned oxidizing agents from the same liquor.

The amounts of the oxidizing agents mentioned above depend, according to the invention, on whether the process is carried out continuously or batchwise: with continuous process control, it is recommended that 1 to 4 g / 1 of the oxidants and 1 g / 1 soda be used in the batch liquors and 0.5 in the subsequent liquors to use 1% of the oxidant. In discontinuous work 0.5 to 2% of the oxidant (based on the weight of the goods) and 1 g / 1 soda have proven to be useful.

The pH of the claimed process can vary within wide limits without affecting the quality of the reoxidation of the leuco dyes, as long as it is ensured that an alkaline medium (p _H ) 8) predominates in the developing baths. The dye development is preferably carried out at pH values in the range between 8 and 12, which are adjusted either by the alkali on the goods, originating from the previous vatting, or better by the separate addition of, for example, soda.

Since the time factor is of no great importance in the oxidation mode according to the invention, the claimed process can be carried out either continuously or batchwise. In the case of continuous working technology, residence times of the material to be dyed in the development / soap baths between 5 and 120 seconds are sufficient.

The temperature of the treatment for reoxidizing and soaping is also relatively uncritical according to the process and, depending on the composition of the dye combination, can vary between 35 ° C and cooking temperature (100 ° C). While in the case of a combination of the sulfur vat dyes with each other temperatures between 35 ° and 50 ° C are used, in the case of combinations of vat and sulfur vat dyes 95 ° C to cooking temperature are preferred.

For the complete soaping out of the dyeings with the vat and / or sulfur vat dyes, the actual oxidation bath is generally followed by further soap baths set at higher temperatures (80 ° C. to cooking temperature). It is not necessary to interpose rinsing baths to remove the unused oxidizing agent.

• 1-4 g/1 der o.a. Oxidantlen,
• 1 g/1 Soda calc. und
• 1-3 g/1 Oleylmethyltaurin,

oder direkt die entsprechende Menge einer fertigen Mischung von diesen Substanzen, wie sie nachstehend als erfindungsgemäße Oxidations- und Nachseifmittel beschrieben werden.In continuous operation, the goods are generally rinsed briefly after steaming and immediately reoxidized / soaped. The reoxidation / soap bath from 35 ° C to cooking temperature then contains, for example

• 1-4 g / 1 of the above oxidantlen,
• 1 g / 1 soda calc. and
• 1-3 g / 1 oleylmethyl taurine,

or directly the corresponding amount of a finished mixture of these substances, as described below as oxidizing and after-soap agents according to the invention.

• 20 bis 80 Gewichtsteilen von in der Wärme Hypochlorit abspaltenden Chemikalien, beispielsweise Oxidationsmitteln vom Typ N-chlorierter Aryl- bzw. Alkylaryl-sulfonsäureamide und/ oder N-chlorierter Isocyanursäuren, vorzugsweise von oxidierend wirkenden Verbindungen bzw. Mischungen davon der weiter oben gegebenen Auswahl, und
• 80 bis 20 Gewichtsteilen von vorzugsweise anionischen, hypochloritbeständigen Tensiden, beispielsweise vom Typ Oleylmethyltaurin und/oder oleylisethionsauren Natriums.

In view of the knowledge gained from the process-related oxidation / soap process, this extends lying invention largely on oxidizing and re-soaping agent for performing the new method. In this respect, the object of this property right is mixtures characterized by a content of

• 20 to 80 parts by weight of heat-releasing chemicals, for example oxidizing agents of the type N-chlorinated aryl- or alkylaryl-sulfonamides and / or N-chlorinated isocyanuric acids, preferably of oxidizing compounds or mixtures thereof of the selection given above, and
• 80 to 20 parts by weight of preferably anionic, hypochlorite-resistant surfactants, for example of the oleyl methyl taurine and / or sodium oleyl isethionic acid type.

These are mixtures of said oxidizing agents with the surfactants mentioned, preferably in powder form. The necessary alkalis, e.g. in the form of soda, in proportions of 0 to 50% by weight of the total mixture.

• 20 bis 80 Gewichtsteilen p-Toluolsulfonsäure-N-chloramid-Natrium,
• 80 bis 20 Gewichtsteilen Oleylmethyltaurin und
• 20 bis 50 Gewichtsteilen Soda calc.

Preferably, the oxidizing and re-soaping agents are composed according to the present invention

• 20 to 80 parts by weight of p-toluenesulfonic acid-N-chloramide sodium,
• 80 to 20 parts by weight of oleyl methyl taurine and
• 20 to 50 parts by weight of soda calc.

The new process is designed for the continuous as well as for the discontinuous oxidation / soaping of dyeings with the dyes mentioned, regardless of the form, for example by padding or printing or using the pull-out technique, these were previously applied to the textile material to be dyed are. They are independent of the type of application after fixation in reduced form on the fiber before and must be reoxidized to the insoluble dye. It follows from this that, in the claimed process, sulfur dyes of other origins are also present, for example linked sulfur dyes (CI Sulfur Dyes), leuco sulfur dyes (CI Leuco Sulfur Dyes) and sulfur dyes solubilized by thiosulfato groups (CI Solubilized Sulfur Dyes), as described in the German published documents DE-A1-33 12 162 and DE-A1-33 38 267 may be mentioned, can be included as a component in the dye mixtures used according to the invention.

The present invention is in principle applicable to textile material which consists of polyester / cellulose fiber mixtures, in which case alkali-stable disperse dyes are then present in the dye preparations containing vat and / or sulfur vat dyes and thus for the coloring of the polyester fiber component in the patterning process according to the invention can actively participate. The disperse dyes, which are essentially different from the other two dye types, are fixed before the vat and / or sulfur vat dyes are converted into their reduced form (vatting) and the subsequent measures for reoxidizing and soaping under alkaline conditions; it can take place by thermosoling or in the HT pull-out process. The advantages of this invention are clear from this, according to which, on the one hand, by using agents which release hypochlorite in the heat, an operationally reliable and economical process for the alkaline reoxidation of vat and sulfur vat dyes and, above all, in combination with one another, that of the known alkaline reoxidation is realized Hydrogen peroxide is superior and, on the other hand, can be used according to the invention as a result of the mild oxidation effect chemicals do not pose any problems with regard to disperse dyes that may be involved. Because of this embodiment of the invention given by the possibility of using disperse dyes, the new process is significantly enriched because it offers commercially available ranges of dye mixtures on the basis mentioned above, in which combinations of both disperse and vat dyes as well as disperse and Sulfur vat dyes are present next to each other, then oxidized together and can thus be used for coloring both types of fibers at the same time without dyeing difficulties.

The percentages given in the examples below mean percentages by weight and, in the case of the data for the liquor intake, are based on the weight of the dry goods.

example 1

A 100% cotton fabric is made according to the so-called pad-steaming process for vat dyes using 10 g / 1 of the Vat Red 14 dye with the C.I. 71110 treated by padding the web from 25 ° C warm, aqueous medium with a pH of about 5.5 and in the presence of an anionic surfactant with a pigment suspension of the insoluble colorant with a liquor absorption of 45% and then at about 115 ° C dries. This impregnation is now padded over with an aqueous bonding liquor based on hydrosulphite / sodium hydroxide solution with a 60% liquor application and steamed for a short time with air-free saturated steam at 105 ° C. with conversion to the leuco form, including fixation thereof, on the fiber.

In order to regress the color pigment and soaps of the vat color produced, the following is then carried out after leaving the steamer:

• 3 g/1 p-Toluolsulfonsäure-N-chloramid-Natrium,
• 1 g/1 Soda kalz. und
• 1 g/1 Oleylmethyltaurin

aufweisenden wäßrigen Bädern der auf dem Gewebe applizierte Leukofarbstoff bei 95°C reoxidiert, und die hierbei entwickelte Färbung wird zugleich geseift, welche letztere man im 5. Abteil, das mit einer wäßrigen Flotte unter Zusatz von

• 0,5 g/1 Soda und
• 0,5 g/1 Oleylmethyltaurin

beschickt ist, einer abermaligen Seifung bei 98°C unterzieht. In den Abteilen 6 und 7 wird die so gefärbte Ware dann erneut mit Wasser gespült sowie mittels einer 3 g/1 Essigsäure enthaltenden Flotte abgesäuert. Abschließend wird das Textilmaterial abgespritzt und fertiggestellt.In the first two boxes of the wide washing machine used to carry out the above-mentioned operations, the material to be treated is first rinsed cold with water. During the passage (average dwell time 20 sec) through the 3rd and 4th compartments under the influence of

• 3 g / 1 p-toluenesulfonic acid-N-chloramide sodium,
• 1 g / 1 soda calc. and
• 1 g / 1 oleyl methyl taurine

having aqueous baths, the leuco dye applied to the fabric is reoxidized at 95 ° C., and the color developed here is also soaped, the latter being used in the 5th compartment, with an aqueous liquor with the addition of

• 0.5 g / 1 soda and
• 0.5 g / 1 oleyl methyl taurine

is subjected to repeated soaping at 98 ° C. In compartments 6 and 7, the goods so dyed are then rinsed again with water and acidified using a liquor containing 3 g / 1 acetic acid. Finally, the textile material is hosed down and finished.

Despite the difficult reoxidation of the dye used in this example, a fully oxidized and soaped scarlet dyeing of the tissue is obtained according to the invention, as comparisons have shown with samples that have been carefully oxidized in a known manner.

Example 2

• 3 % des Schwefelküpenfarbstoffes Vat Blue 43 mit der C.I.-Nr. 53630

und weiterhin noch

• 5 cm³/l Natronlauge 32,5 %ig,
• 4 g/1 Hydrosulfit sowie
• 2 g/1 eines schaumarmen Netzmittelgemisches auf Basis einer Kombination anionischer und nichtionischer Tenside

enthält, nach dem üblichen Ausziehverfahren 45 min bei 90°C gefärbt.80 kg of 100x cotton yarn on cross-wound bobbins are in the yarn dyeing machine with a liquor ratio of 1:10 and with changing circulation direction with an aqueous liquor which - based on the weight of the dry goods -

• 3% of the Vat Blue 43 sulfur vat dye with CI no. 53630

and still

• 5 cm ³ / l caustic soda 32.5%,
• 4 g / 1 hydrosulfite as well
• 2 g / 1 of a low-foam wetting agent mixture based on a combination of anionic and nonionic surfactants

contains, dyed at 90 ° C for 45 min using the usual pull-out method.

• 1 % p-Toluolsulfonsäure-N-chloramid-Natrium,
• 1 g/1 Soda und
• 1 g/1 Oleylmethyltaurin

zugesetzt. Man erwärmt dieses Bad zunächst auf 40°C, hält es 10 bis 15 min bei dieser Temperatur, erneuert das Bad daraufhin zur Hälfte, wobei es noch einmal mit 0,5 g/1 Oleylmethyltaurin beschickt wird, und seift die so gefärbte Ware nunmehr bei Kochtemperatur weitere 10 min lang. Erneutes Spülen und Trocknen beenden den Färbeprozeß.The bath and the textile goods treated in this way are then cooled to 70 ° C. and the latter is first rinsed clear with water in the overflow. Without having to change the bath, the rinsing liquor is then re-oxidized for the purpose of dye development while soaping the resulting color

• 1% p-toluenesulfonic acid-N-chloramide sodium,
• 1 g / 1 soda and
• 1 g / 1 oleyl methyl taurine

added. This bath is first heated to 40 ° C., it is kept at this temperature for 10 to 15 minutes, the bath is then renewed in half, with 0.5 g / 1 oleylmethyl taurine being charged again, and the goods so dyed are now soaped in Cook temperature for another 10 minutes. Rinsing and drying again end the dyeing process.

A strong, real blue coloring of the coils is obtained. In contrast to conventional oxidation using hydrogen peroxide from an alkaline medium, according to the invention there is no formation of a coat and no reduction in the washfastness of the dyeing.

Example 3

• 17,5 % des blauen Dispersionsfarbstoffes der Formel
  
• 2,7 % des roten Dispersionsfarbstoffes der Formel
  
  und
• 16,5 % des Schwefelküpenfarbstoffes Vat Blue 43 mit der C.I.-Nr. 53630,
• 10 g/1 einer handelsüblichen Farbstoffmischung aus 8,5 % des orangen Dispersionsfarbstoffes der Formel
  
• 2,4 % des gelben Dispersionsfarbstoffes der Formel
  
• 2,8 % des blauen Dispersionsfarbstoffes der Formel
  
  und
• 26,2 % des Küpenfarbstoffes Vat Green 14 mit der C.I.-Nr. 58830,
• sowie weiterhin noch
• 10 g/1 eines Klotzhilfsmittels mit Verdickungswirkung auf Basis eines Polyacrylderivates sowie
• 2 g/1 eines Netzmittels auf Basis einer Kombination anionischer und nichtionischer Tenside

enthält, und mittels Essigsäure den pH-Wert von 6 eingestellt ist.A polyester fiber / cotton blend (in a ratio of 65:35) is to be dyed according to a continuous technique with dye mixtures of disperse dyes and vat or sulfur vat dyes. For this purpose, an aqueous padding liquor is prepared which comprises 30 g / l of a commercially available dye mixture

• 17.5% of the blue disperse dye of the formula
  
• 2.7% of the red disperse dye of the formula
  
  and
• 16.5% of the Vat Blue 43 sulfur vat dye with CI no. 53630,
• 10 g / 1 of a commercial dye mixture from 8.5% of the orange disperse dye of the formula
  
• 2.4% of the yellow disperse dye of the formula
  
• 2.8% of the blue disperse dye of the formula
  
  and
• 26.2% of Vat Green 14 vat dye with CI no. 58830,
• as well as still
• 10 g / 1 of a block aid with a thickening effect based on a polyacrylic derivative and
• 2 g / 1 of a wetting agent based on a combination of anionic and nonionic surfactants

contains, and the pH value of 6 is adjusted by means of acetic acid.

With the fleet prepared in this way, you now block the goods at room temperature and a fleet absorption of 60% where after the dye is dried continuously at 120 ° C and thermosolated for 1 min at 215 ° C.

• 100 cm³/1 Natronlauge 32,5 %ig und
• 55 g/1 Hydrosulfit,

bei 60 % Flottenaufnahme übergeklotzt und 60 sek bei 102°C luftfrei gedämpft.This impregnation is then used for dye dyeing with an aqueous liquor

• 100 cm ^3/1 sodium hydroxide solution of 32.5% strength and
• 55 g / 1 hydrosulfite,

padded at 60% liquor absorption and steamed free of air at 102 ° C for 60 seconds.

• 4 g/1 p-Toluolsulfonsäure-N-chloramid-Natrium
• 1 g/1 Soda kalz. und
• 1 g/1 Oleylmethyltaurin

die Reoxidation der auf dem Substrat fixierten Leukofarbstoffe statt, verbunden mit gleichzeitigem Seifen der erzeugten Färbung. In den folgenden weiteren Abteilen wird die letztere mit Wasser erneut gespült, mittels Essigsäure abgesäuert und nach abermaligem Spülen schließlich fertiggestellt. Im Anschluß an das Trocknen erhält man eine Tonin-Ton-Marineblaufärbung des Mischgewebes auf beiden Faserkomponenten.For dye development, the mixed fabric treated in this way is run through a wide washing machine and is rinsed there in the first two compartments, first with cold water and then in the third compartment with water at 50.degree. The 4th and 5th compartments then take place in the course of exposure to a 98 ° C aqueous development bath

• 4 g / 1 p-toluenesulfonic acid-N-chloramide sodium
• 1 g / 1 soda calc. and
• 1 g / 1 oleyl methyl taurine

the reoxidation of the leuco dyes fixed on the substrate takes place, combined with simultaneous soaping of the color produced. In the following further compartments, the latter is rinsed again with water, acidified with acetic acid and finally finished after rinsing again. After drying, a tonin-tone navy blue dyeing of the mixed fabric on both fiber components is obtained.

In the case of an alkaline reoxidation of the same dyeing using hydrogen peroxide, which is carried out in a known manner, the dyeing result is problematic because of the different reoxidation behavior of vat and sulfur vat dye and often leads to differences in nuances within a batch. In contrast, these difficulties are not to be expected with the reoxidation / soaping process according to the invention.

example

• 17,5 % des blauen Dispersionsfarbstoffes der Formel
  
• 2,7 % des roten Dispersionsfarbstoffes der Formel
  
  und
• 16,5 % des Schwefelküpenfarbstoffes Vat Blue 43 mit der C.I.-Nr. 53630,
• 0,2 % einer handelsüblichen Farbstoffmischung aus 13,1 % des orangen Dispersionsfarbstoffes der Formel
  
  0,75 % des roten Dispersionsfarbstoffes der Formel
  
• 15 % des Küpenfarbstoffes Vat Yellow 33 mit der C.I.-Nr. 65429 und
• 5 % des Küpenfarbstoffes Vat Red 14 mit der C.I.-Nr. 71110
• sowie 1,5 g/1 des Natrium-Salzes von 2,2'-Dinaphthylmethan-6,6'-disulfonsäure (als Dispergiermittel)

aufweist, bei 60°C an und stellt den pH-Wert derselben mittels Essigsäure auf 4,5 ein.In an HT dyeing machine, 240 kg of a polyester / cotton blended yarn (in a ratio of 65:35) are to be dyed on packages with a liquor ratio of 1:12 using the pull-out method. The aqueous liquor intended for this purpose, which - based on the weight of the dry dye material - is exposed to 2.8% of a commercially available dye mixture

• 17.5% of the blue disperse dye of the formula
  
• 2.7% of the red disperse dye of the formula
  
  and
• 16.5% of the Vat Blue 43 sulfur vat dye with CI no. 53630,
• 0.2% of a commercial dye mixture from 13.1% of the orange disperse dye of the formula
  
  0.75% of the red disperse dye of the formula
  
• 15% of Vat Yellow 33 vat dye with CI no. 65429 and
• 5% of Vat Red 14 vat dye with CI no. 71110
• and 1.5 g / 1 of the sodium salt of 2,2'-dinaphthylmethane-6,6'-disulfonic acid (as a dispersant)

has, at 60 ° C and the pH of the same to 4.5 using acetic acid.

• 15 cm³/1 Natronlauge 32,5 %ig und
• 5 g/1 Hydrosulfit
• und nach weiteren 10 Minuten Zirkulation ferner noch
• 20 g/1 Glaubersalz kalz.

hinzu und beläßt bei 80°C sowie fortdauernder Flottenumwälzung das Textilgut zur Farbstoffverküpung insgesamt 30 Minuten unter dem Einfluß der angewandten Reduktionsbedingungen.Then the dyeing liquor prepared in this way is heated to 135 ° C. and the goods are now dyed at this temperature for 35 minutes with changing circulation directions. After the bath has cooled down, together with the bobbins treated in this way, to 80 ° C, the dyeing vessel is placed in the order given, without changing the liquor beforehand

• 15 cm ^3/1 sodium hydroxide solution of 32.5% strength and
• 5 g / 1 hydrosulfite
• and after another 10 minutes of circulation
• 20 g / 1 Glauber's salt calc.

added and at 80 ° C and continuous liquor circulation leave the textile material for dye coupling a total of 30 minutes under the influence of the reduction conditions used.

• 40 % Oleylmethyltaurin,
• 40 % p-Toluolsulfonsäure-N-chloramid-Natrium sowie
• 20 % Soda kalz.,

der auf das Fasermaterial aufgezogene Leukofarbstoff bei 80°C reoxidiert und die erstellte Färbung zugleich geseift. Ein weiteres kochendes Seifen von etwa 10 Minuten im wäßrigen Medium unter Zusatz von

• 0,5 g/l Oleylmethyltaurin und
• 0,5 g/l Soda

sowie abermaliges warmes und kaltes Spülen mit Wasser beenden sodann die Färbung.After draining the previously used bath, the goods are rinsed with water and then under the action of an aqueous development bath containing the same liquor ratio of 1:12 6 kg of a mixture

• 40% oleyl methyl taurine,
• 40% p-toluenesulfonic acid-N-chloramide sodium as well
• 20% soda ash,

the leuco dye drawn onto the fiber material reoxidizes at 80 ° C and the dyeing is also soaped. Another boiling soap of about 10 minutes in the aqueous medium with the addition of

• 0.5 g / l oleyl methyl taurine and
• 0.5 g / l soda

and repeated warm and cold rinsing with water then stop the coloring.

A level navy blue dyeing of the mixed yarn on the two fiber components is obtained.

• 2 % Wasserstoffperoxid (33 %ig) und
• 1 g/1 Soda kalz.

bei 60°C vollzogen, dann besteht für das färberische Resultat die Gefahr, durch ungleiche Oxidation der Küpen- bzw. Schwefelküpen-Farbstoffanteile eine sogenannte Mantelbildung der Färbung auf der solchermaßen behandelten Garnwicklung zu verursachen.On the other hand, reoxidation is used to develop the leuco dyes involved according to the above dyeing recipe under traditional conditions in an alkaline bath

• 2% hydrogen peroxide (33%) and
• 1 g / 1 soda calc.

carried out at 60 ° C, then there is the danger for the dyeing result of causing so-called coat formation of the dyeing on the yarn winding treated in this way by uneven oxidation of the vat or sulfur vat dye components.

Claims (13)

1. A process for single-bath reoxidation and soaping of dyeings with vat and / or sulfur vat dyes, which have previously been applied in reduced form to a cellulose fiber-containing textile material and fixed there, from an alkaline medium, characterized in that the above dyes are used textile fabrics treated alone or in combination with one another for dye development are exposed to the oxidizing action of an aqueous solution of chemicals which release hypochlorite in the heat at pH values above 8 and a temperature between 15 ° C. and the boiling point of the liquor and simultaneously with the oxidation in the same soap bath initiates or initiates the soaping process with the aid of preferably anionic surfactants which are insensitive to hypochlorite. 2. The method according to claim 1, characterized in that N-chlorinated aryl or alkylaryl sulfonamides and / or N-chlorinated isocyanuric acids are used as the oxidizing agent of the type which releases hypochlorite chemicals in the heat. 3. The method according to claim 1 and 2, characterized in that the oxidizing agent is the sodium salts of p-toluenesulfonic acid-N-chloramide, benzenesulfonic acid-N-chloramide, 1-benzenesulfonic acid-N-chloramide-3-carboxylic acid or o-toluenesulfonic acid-N -chloramide, or p-toluenesulfonic acid-N, N-dichloramide or dichloroisocyanuric acid used individually or in a mixture with one another. 4. The method according to claim 1, characterized in that one uses as an anionic surfactants oleyl methyl taurine or oleyl isethionic sodium or in a mixture with each other. 5. Process according to claims 1 to 4, characterized in that the measures for reoxidizing and soaping are carried out at temperatures from 35 ° to 100 ° C. 6. The method according to claims 1 to 5, characterized in that one carries out the measures for reoxidizing and soaping at pH values from 8 to 12. 7. Process according to claims 1 to 6, characterized in that the measures for reoxidizing and soaping are carried out continuously. 8. Process according to claims 1 to 6, characterized in that the measures for reoxidizing and soaping are carried out discontinuously. 9. The method according to claims 1 to 4 for single-bath reoxidation and soaping of dyeings with vat and / or sulfur vat dyes on textile material made of polyester / cellulose fiber mixtures, characterized in that in the above dyes alone or in combination with one another, preparations containing them in addition alkali-stable dispersion dyes are present, and fixation of dispersion dyes applied in this way before the vat and / or sulfur vat dyes are converted into their reduced form. 10. oxidizing and re-soaping agent for performing the method according to claims 1 to 9, characterized by a content of a mixture of: 20 to 80 parts by weight of heat-releasing chemicals and hypochlorite 80 to 20 parts by weight of a preferably anionic, hypochlorite-resistant surfactant. 11. Oxidizing and after-soaping agent according to claim 10, characterized in that it contains a mixture of: 20 to 80 parts by weight of oxidizing agents of the type N-chlorinated aryl or alkylaryl sulfonamides and / or N-chlorinated isocyanuric acids and 80 to 20 parts by weight of anionic surfactants of the oleyl methyl taurine and / or sodium oleyl isethionic acid type. 12. Oxidizing and soaping agent according to claim 10, characterized in that for the oxidation of the sodium salts of p-toluenesulfonic acid-N-chloramide, benzenesulfonic acid-N-chloramide, 1-benzenesulfonic acid-N-chloramide-3-carboxylic acid or o-toluenesulfonic acid-N -chloramide, or p-toluenesulfonic acid-N, N-dichloramide or dichloroisocyanuric acid are provided individually or in a mixture with one another. 13. oxidizing and re-soaping agent for performing the method according to claim 7 consisting of a mixture of 20 to 80 parts by weight of p-toluenesulfonic acid-N-chloramide-sodium, 80 to 20 parts by weight of oleyl methylraurine and 20 to 50 parts by weight of soda calc.