CN117822329A - Dyeing method of cotton-containing textile materials - Google Patents

Abstract

The invention relates to a dyeing method for textile materials containing cotton, wherein the textile materials are treated with a liquid containing at least one reactive dye, at least one surfactant, at least one silicone oil and water.

Description

Dyeing method of cotton-containing textile materials

Technical Field

The present invention relates to a method for dyeing a cotton-containing textile material, wherein the textile material is treated with a liquid containing at least one reactive dye, at least one silicone oil, at least one surfactant and water, and to a dyed cotton-containing textile material obtained according to such a method.

Background technique

The dyeing and finishing of textiles consumes large amounts of dyes and fresh water every year, and also produces large amounts of wastewater [see references 1 to 3].

These effluents have serious carcinogenic effects on aquatic biota and humans [4,5]. To address this issue, governments are increasingly focusing on the implementation of environmental regulations. In this context, new technologies are being developed to improve dye quality/fixation and reduce waste disposal. Therefore, the industry is looking for alternative ways to overcome the above problems, and in particular, attempts are being made to improve dyeing machines [6], dye chemicals [7-9] and cotton substrates [10-15].

Among all the new dyeing techniques [16, 17], reactive dyeing using organic solvents has become very popular. Various organic solvent dyeing media have been developed to reduce the amount of hydrolysis and waste of reactive dyes. Typically, non-nucleophilic organic solvents such as DMSO [18], DMAc [19], hexane [20], ethanol [21] and ethyl octanoate [22] are selected as dyeing media. However, solvent dyeing has several limitations, such as being difficult to achieve zero discharge or 100% solvent recycling. In addition, most organic solvents have low flash points, high volatility or other unfavorable properties. Supercritical CO ₂ (ScCO ₂ )-cotton dyeing technology has also been discussed as an alternative dyeing medium, although this may require additional swelling agents and extensive structural modifications of commercial reactive dyes to obtain strong color depth (colour depth) [23, 24].

The most successful attempt that can be considered for industrial scale implementation is the cationization of cotton with 3-chloro-2-hydroxypropyltrimethylammonium chloride (CHPTAC). It is well established in the literature that CHPTAC has high dye fixation efficiency without environmental impact [25-29]. However, industry has not yet embarked on this approach because the application of CHPTAC to cotton must be carried out in cold pad-batch, pad-steam, pad-bake-cook and pad-bake processes. However, these methods require batch processing times of 16 to 24 hours; moreover, this method is most suitable for textile articles [30, 31].

In non-aqueous dyeing technology, D5 medium [32-35], waste cooking oil [36] and cottonseed oil [37] are used as dyeing medium for cotton fabric dyeing. In this method, dye fixation is improved with the help of an external phase, thereby reducing the emission of pollutants. The advantage here is that no salt is required for dyeing. However, this technology also has some practical limitations. Since waste cooking oil, hydrocarbons and D5 medium are used for dyeing, during dyeing under high temperature and alkaline/acidic conditions, waste cooking oil may saponify or become rancid. In addition, due to processing and toxicological reasons, the use of hydrocarbons and D5 medium for dyeing is limited.

Some existing dyeing methods for cotton fibers utilize large amounts of water, with electrolytes such as _NaCl or _Na2SO4 gradually added in batches to promote the adsorption of dyes and chemicals during the dyeing process. However, due to the dissociation of hydroxyl groups on cotton fibers, cotton tends to produce a slight negative surface charge when it comes into contact with water, resulting in electrostatic repulsion between the dye and the fiber. In order to suppress this repulsion and increase the affinity of the reactive dye to the fiber, a large amount of salt is required.

Conventional dyeing methods for cotton fibers generally use large amounts of dye liquor, which contains fresh water at a high liquor ratio. In addition, these methods are relatively time-consuming and are associated with considerable amounts of liquid waste.

This results in potential harm to the environment and high ETP process costs.

Water scarcity and rising environmental awareness have created a need to develop and adopt waterless dyeing technology.

Furthermore, some prior art methods are unfriendly and environmentally harmful in their handling and are also associated with practical limitations.

Therefore, dyeing system should be environmentally friendly, cost-effective and safe, to be suitable for replacing conventional aqueous system.In this case, oil will be suitable alternative dyeing medium, because they are safe, recycle and have multiple reuse.Because the heat capacity of oil is lower than the heat capacity of water, reaching the same dyeing temperature will consume less energy, so this method will be more energy effective.Yet, use oil as dyeing medium also has some problems, first dye is insoluble in oil, and secondly oil and water are immiscible.In addition, dyeing method needs high temperature usually, and this can cause oil to become rancid, and dyeing method relates to acidic and alkaline conditions, and this can saponify fatty oil.

Therefore, there is a need to overcome the deficiencies of the prior art.

In particular, a dyeing process is needed which produces good all-round fastness properties, for example good fastnesses to rubbing, wet fastness, wet rubbing, washing, water fastness, seawater fastness and perspiration fastness are obtained. The washing fastness properties are especially of very good values. The total duration of the dyeing process can be reduced, which also saves energy. Since the dyeing medium is recycled according to the process of the invention and is used several times, the water used in the process is about 80% lower than in conventional processes.

It has now surprisingly been found that a large part of the water in the dyeing medium for dyeing cotton can be replaced by silicone oil as dyeing medium, whereby the fresh water used in the process can be significantly reduced by up to 85%. Furthermore, the use of electrolytes such as _NaCl or _Na2SO4 can be avoided.

The dye solution can be easily dispersed in the oil dyeing medium with the help of surfactants. The use of surfactants can solve the problem of immiscibility of dyes and water with oil. This significantly increases the chemical potential of the dye in the dyeing medium, making it possible to improve dye fixation and minimize waste discharge.

The proposed dyeing technology can reduce the time cycle, electrolytes and energy, and consume less water. The dyeing medium can be reused and can be recycled, which reduces waste liquid pollutants.

The present invention therefore relates to a process for dyeing a cotton-containing textile material, wherein the textile material is treated with a liquid containing at least one reactive dye, at least one silicone oil, at least one surfactant and water, and to a dyed cotton-containing textile material obtained according to such a process.

Dyeing in this way gives good all-round fastness properties, for example good fastness to rubbing, fastness to moisture, fastness to wet rubbing, fastness to washing, fastness to water, fastness to seawater and fastness to perspiration. The fastness to washing properties especially have very good values. The total duration of the dyeing process can also be reduced, which saves energy. Since the dyeing medium can be recycled and used several times in the method according to the invention, the water used in the liquid can be about 80% lower than in conventional methods.

In this specification and claims, the term "consisting essentially of" followed by one or more features means that in addition to the explicitly listed components or steps, components or steps that do not substantially affect the nature and characteristics of the invention may be included in the method or material of the invention.

Unless expressly stated otherwise, the expression "comprising between X and Y" includes the boundaries. This expression means that the target range includes the X and Y values, as well as all values from X to Y.

Throughout the description and claims of this specification, the words "comprise" and "comprising" and variations of the words, such as "including" and "comprising", mean "including but not limited to", and do not exclude other parts, additives, components, integers or steps. In addition, unless the context requires otherwise, the singular includes the plural: in particular, where the indefinite article is used, the specification is to be understood as contemplating plural as well as singularity, unless the context requires otherwise.

When upper and lower limits are cited for a property, such as component concentration, a range of values defined by the combination of any upper limit with any lower limit may also be implied.

Summary of the invention

The invention relates to a method for dyeing a cotton-containing textile material, wherein the textile material is treated with a liquid containing at least one reactive dye, at least one silicone oil, at least one surfactant and water.

The dyeing process for the cotton-containing textile material preferably comprises or is an exhaust dyeing process.

The method according to the invention is suitable for dyeing cotton-based fiber materials and can be used to dye 100% cotton fabrics or fabrics containing cotton as well as other materials.

In one embodiment, the method of the invention comprises the following steps, preferably in this order:

(a) incubating a textile material with a liquid comprising at least one reactive dye, at least one silicone oil, at least one surfactant and water,

(b) heating the mixture of step (a), preferably to a temperature of 60 to 100°C.

In one embodiment, the at least one surfactant is selected from butyl polyalkylene glycol copolymers or EO molecules based on C12-C14 alcohols, preferably block copolymers in which a central polypropylene glycol group is flanked by two polyethylene glycol groups.

In one embodiment, the above-mentioned surfactants may be used in combination.

In one embodiment, several surfactants are used, preferably two or three surfactants.

In one embodiment, the at least one surfactant is present in an amount of 1 to 5 g/l, preferably 2 to 4 g/l.

Preferably, the temperature during the incubation in step (a) is from 20 to 40°C.

The incubation step (a) is preferably performed for 5 to 15 minutes.

Heating step (b) preferably comprises heating to 60 to 100°C, especially 70 to 90°C, for example about 80°C.

The heating step (b) is preferably carried out for 20 to 40 minutes.

Without being bound by this theory, it can be assumed that the dyeing process can be divided into three different steps. In step I, the temperature is low and the dye molecules are constantly adsorbed on the fabric surface. In step II, the temperature is increased so that the adsorption and desorption of the dye from the fiber surface reach equilibrium at a temperature of, for example, 40-70°C. In step III, for example at 60°C, after the addition of alkali, the fixation between the fiber molecular chains and the reactive dye increases, and therefore the dye uptake increases.

The at least one silicone oil constitutes the main substitute of water and is therefore a decisive contributor in the dyeing method. Silicone oil, particularly non-functional silicone oil, shows good synergy between acidic and alkaline conditions at high temperatures. Moreover, it shows excellent levelness and color strength and has the benefit of being reusable. In addition, the use of different media, such as hydrocarbons, solvents and different fatty acids (oils), is unfriendly to the treatment and harmful to the environment. In addition, the dyeing method involving acidic and alkaline conditions may cause the saponification of fatty oils and the rancidity of fatty oils at high temperatures.

In one embodiment, the method of the present invention further comprises the following steps, preferably in this order and preferably after the above steps (a) and (b):

(c) adding a base, and

(d) Neutralizing and washing the textile material.

The addition of the base is preferably carried out using a carbonate, such as sodium carbonate or potassium hydroxide.

The addition of the base is preferably carried out at a temperature lower than the temperature in step (b).

The addition of the base is preferably carried out at a temperature of 50 to 70°C.

The addition of the base is preferably carried out over 10 to 20 minutes.

In one embodiment, the cotton-containing textile material may be washed between steps (b) and (c), preferably using hot water.

After addition of the base, the dyeing mixture is preferably neutralized to a pH of about 3 to 5.

Neutralization can be carried out using a weak acid such as acetic acid.

Neutralization is preferably carried out at a temperature of 30 to 40°C.

After neutralization, the dyed cotton-containing textile material is soaped, preferably cold washed, preferably with water.

After washing, the cotton-containing textile material may be dried using any conventionally known drying method, such as heating to, for example, about 60 to 80° C., preferably for 30 to 40 minutes.

In one embodiment, the process according to the invention is characterized in that the weight ratio of the at least one silicone oil to water is from 75:25 to 90:10, preferably from 85:15 to 90:10.

The advantage of this weight ratio is that the high silicone oil ratio reduces the content of water and auxiliaries used in the dyeing system and shows a high increase in dye uptake at high depths, which leads to increased color strength.

In one embodiment, the process according to the invention is characterized in that the weight ratio of cotton-containing textile material to liquid is from 1:10 to 1:35, preferably from 1:15 to 1:25.

The advantage of this weight ratio is good flowability of the textile material during the dyeing process for uniform color absorption.

In one embodiment, the process according to the invention is characterized in that the pH of the liquid is between 5.5 and 6.5.

Preferably, during process steps (a) and (b), the pH of the liquid is between 5.0 and 6.0.

The pH can be adjusted using commonly known acids and/or bases as well as commonly known buffer substances.

In one embodiment, the process according to the invention is characterized in that the amount of the at least one reactive dye in the liquor is 0.01-15% by weight, preferably 0.1-6% by weight, based on the total weight of the fabric.

In case more than one reactive dye is used, the amount as defined above refers to the sum of the amounts of all reactive dyes used in one embodiment.

In another embodiment, where more than one reactive dye is used, the amounts defined above refer to the amount of each reactive dye alone.

In one embodiment, the process according to the invention is characterized in that exactly one reactive dye is present in the liquid.

In one embodiment, the process according to the invention is characterized in that more than one reactive dye is present in the liquid. Preferably, two, three or four different reactive dyes may be present in the liquid.

Thus, the dyes may be applied individually or in mixtures, either two or three dyes (di- or tri-color) or four or more dye mixtures, especially when producing black/grey shades.

There are no particular restrictions on the reactive dyes, but all reactive dyes known for dyeing cotton-containing textile materials can be used.

In one embodiment, the process according to the invention is characterized in that the at least one reactive dye is chosen from AVITERA YELLOW SE, AVITERA Red SE, AVITERA Blue SE, AVITERA Deep Blue SE, AVITERA Deep Sea SE, AVITERA Navy SE, AVITERA Orange SE, AVITERA Black SE, AVITERA Rose SE, NOVACRON Yellow S-3R, NOVACRON Yellow EC-2R, NOVACRON Bold Yellow, NOVACRON Deep Red EC-D, reactive Red 239, NOAVCRON Bold Red, NOAVRON Blue EC-R, NOVACRON Deep Blue S-DC, NOVACRON Navy S-G, NOVACRON Bold Navy, NOAVCRON Bold Deep Navy, NOVACRON Deep night S-R, NOVACRON Scarlet EC-6G, NOVACRON Ruby S-3B, NOVACRONOrange EC-3R, NOVACRON Deep Orange S-4R, NOVACRON Brown C-7R, NOVACRON Red EC-2BL, NOVACRON Red WIN, NOVACRON Navy EC-BN, NOVACRON Dark Blue S-GL, NOVACRONSuper Black G, NOVACRON Super Black R and NOVACRON Black W-NN.

In one embodiment, the method according to the invention is characterized in that the cotton-containing textile material consists of cotton or comprises a cotton blend. Preferred blends comprise cotton and polyester fabrics, wherein the ratio of cotton to polyester is about 25:75, preferably about 33:67, most preferably about 50:50.

The cotton-containing textile material may be in a variety of processed forms, for example in the form of fibers, yarns, woven or knitted fabrics and/or in the form of carpets.

The at least one silicone oil used in the method according to the present invention is not particularly limited.

Preferably, the at least one silicone oil comprises or consists of a non-functional silicone.

Preferably, the at least one silicone oil comprises or consists of linear silicones.

Preferably, the at least one silicone oil comprises or consists of linear non-functional silicones.

Preferably, the at least one silicone oil comprises or consists of polydimethylsiloxane, preferably having a viscosity at 25° C. of 50 to 370 cPs (measured on a Brookfield viscometer).

Preferably, the at least one silicone oil has a viscosity of 50 to 370 cPs at 25°C and/or a viscosity of 30 to 220 cPs at 50°C and/or a viscosity of 25 to 180 cPs at 70°C (measured on a Brookfield viscometer).

Preferably, said at least one silicone oil has a boiling point above 230°C.

In one embodiment, a silicone oil is used in the method of the present invention.

In another embodiment, two or more than two different silicone oils (silicone oil mixtures) are used in the process according to the invention.

The liquid may further comprise conventional additives such as desizing agents, bleaching agents, wetting agents, enzymes, stabilizers, complexing agents, dispersants, defoamers, leveling agents, penetration enhancers and pH adjusters such as buffers.

Such additives are generally each contained in the liquid in an amount of 0.1 to 5% by weight based on the weight of the liquid.

In one embodiment, the liquid does not contain any additives, in particular does not contain the above-mentioned additives.

The invention also relates to a dyed cotton-containing textile material obtainable according to the above process.

All definitions and preferred embodiments mentioned above apply analogously to the dyed cotton-containing textile materials.

The following examples are provided to illustrate the present invention. Unless otherwise indicated, parts are by weight and percentages are by weight. Temperatures are given in degrees Celsius.

Detailed ways

Embodiment 1:

5 grams of cotton fabric were immersed in a water-oil liquor containing a solution of a surfactant and a reactive dye. The fiber:liquid ratio was 1:20. The surfactant solution was added at 2 g/l of PLURONIC PE 10100 and 1% of AVITERA® Yellow SE (reactive dye) was added relative to the weight of the fabric. The total amount of water in the dyeing system was 15 grams and the oil was 85 grams. The liquor was then stirred at 30°C for 10 minutes and then heated to 80°C at a rate of 2°C/min. After 25 minutes at 80°C, the temperature was maintained for a further 20 minutes and then cooled to 60°C at a rate of 3°C/min. Sodium carbonate solution was added at 60°C and maintained for a further 40 minutes. The fabric was then washed twice with hot water and further treated for neutralization, followed by soaping and cold washing. The fastness of the mid-tones was tested and good fastness properties were observed.

Comparative Example 1a:

5 g of cotton fabric was immersed in water containing a solution of auxiliaries and reactive dyes. The fiber:liquid ratio was 1:10. Auxiliary solutions were added at 1 g/l ALBATEX DBC (protective colloid), 1 g/l ALBAFLUID C (lubricant), 0.5 g/l ALBATEX LD (leveling agent), 1 g/l ALBAFLOW CIR (penetration enhancer), 60 g/l Glauber's salt and 1% AVITERA® Yellow SE (reactive dye) was added relative to the weight of the fabric. The total amount of water in the dyeing system was 50 g. The liquor was then stirred at 30°C for 10 minutes and then heated to 60°C at a rate of 2°C/min. After 15 minutes at 60°C, the temperature was maintained for a further 45 minutes and then a sodium carbonate solution was added and maintained for a further 45 minutes. The fabric was then washed cold and then treated for neutralization and subsequently hot, soaped and cold washed.

Embodiment 2:

5 grams of cotton fabric were immersed in a water-oil liquor containing a solution of a surfactant and a reactive dye. The fiber:liquid ratio was 1:20. The surfactant solution was added at 2 g/l of PLURONIC PE 10100 and 1% of AVITERA® Red SE (reactive dye) was added relative to the weight of the fabric. The total amount of water in the dyeing system was 15 grams and the oil was 85 grams. The liquor was then stirred at 30°C for 10 minutes and then heated to 80°C at a rate of 2°C/min. After 25 minutes at 80°C, the temperature was maintained for a further 20 minutes and then cooled to 60°C at a rate of 3°C/min. Sodium carbonate solution was added at 60°C and maintained for a further 40 minutes. The fabric was then washed twice with hot water and further treated for neutralization, followed by soaping and cold washing. The fastness of the mid-tones was tested and good fastness properties were observed.

Comparative Example 2a:

5 g of cotton fabric was immersed in water containing a solution of auxiliaries and reactive dyes. The fiber:liquid ratio was 1:10. The auxiliary solution was added with 1 g/l ALBATEX DBC (protective colloid), 1 g/l ALBAFLUID C (lubricant), 0.5 g/l ALBATEX LD (leveling agent), 1 g/l ALBAFLOW CIR (penetration enhancer), 60 g/l Glauber's salt and 1% AVITERA® Red SE (reactive dye) was added relative to the weight of the fabric. The total amount of water in the dyeing system was 50 g. The liquor was then stirred at 30°C for 10 minutes and then heated to 60°C at a rate of 2°C/min. After 15 minutes at 60°C, the temperature was maintained for a further 45 minutes and then a sodium carbonate solution was added and maintained for a further 45 minutes. The fabric was then washed cold and then treated for neutralization and subsequently hot, soaped and cold washed.

Embodiment 3:

5 grams of cotton fabric were immersed in a water-oil liquor containing a solution of a surfactant and a reactive dye. The fiber:liquid ratio was 1:20. The surfactant solution was added at 2 g/l of PLURONIC PE 10100 and 1% of AVITERA® Blue SE (reactive dye) was added relative to the weight of the fabric. The total amount of water in the dyeing system was 15 grams and the oil was 85 grams. The liquor was then stirred at 30°C for 10 minutes and then heated to 80°C at a rate of 2°C/min. After 25 minutes at 80°C, the temperature was maintained for a further 20 minutes and then cooled to 60°C at a rate of 3°C/min. Sodium carbonate solution was added at 60°C and maintained for a further 40 minutes. The fabric was then washed twice with hot water and further treated for neutralization, followed by soaping and cold washing. The fastness of the mid-tones was tested and good fastness properties were observed.

Comparative Example 3a:

5 g of cotton fabric was immersed in water containing a solution of auxiliaries and reactive dyes. The fiber:liquid ratio was 1:10. Auxiliary solutions were added at 1 g/l ALBATEX DBC (protective colloid), 1 g/l ALBAFLUID C (lubricant), 0.5 g/l ALBATEX LD (leveling agent), 1 g/l ALBAFLOW CIR (penetration enhancer), 60 g/l Glauber's salt and 1% AVITERA® Blue SE (reactive dye) was added relative to the weight of the fabric. The total amount of water in the dyeing system was 50 g. The liquor was then stirred at 30°C for 10 minutes and then heated to 60°C at a rate of 2°C/min. After 15 minutes at 60°C, the temperature was maintained for a further 45 minutes and then a sodium carbonate solution was added and maintained for a further 45 minutes. The fabric was then washed cold and then treated for neutralization and subsequently hot, soaped and cold washed.

Embodiment 4:

5 grams of cotton fabric were immersed in a water-oil liquid containing a solution of a surfactant and a reactive dye. The ratio of fiber:liquid was 1:20. The surfactant solution was added with PLURONIC PE 10100 2g/l, and 1.0% AVITERA® Yellow SE, 1.0% AVITERA Red SE and 1.0% AVITERA Blue SE (reactive dye) were added relative to the fabric weight. The total amount of water in the dyeing system was 15 grams, and the oil was 85 grams. The liquid was then stirred at 30°C for 10 minutes, and then heated to 80°C at a rate of 2°C/minute. After 25 minutes at 80°C, the temperature was continued to be maintained for 20 minutes, and then cooled to 60°C at a rate of 3°C/minute. Sodium carbonate solution was added at 60°C and continued to be maintained for 40 minutes. The fabric was then washed twice with hot water, and further treated to be neutralized, followed by soaping and cold washing. The fastness of the intermediate tone was tested, and good fastness properties were observed.

Comparative Example 4a:

5 grams of cotton fabric were immersed in water containing a solution of auxiliaries and reactive dyes. The fiber:liquid ratio was 1:10. Auxiliary solutions were added with 1 g/l ALBATEX DBC (protective colloid), 1 g/l ALBAFLUID C (lubricant), 0.5 g/l ALBATEX LD (leveling agent), 1 g/l ALBAFLOW CIR (penetration enhancer), 60 g/l Glauber's salt, and 1.0% AVITERA® Yellow SE, 1.0% AVITERA Red and 1.0% AVITERA Blue SE (reactive dyes) were added relative to the weight of the fabric. The total amount of water in the dyeing system was 50 grams. The liquor was then stirred at 30°C for 10 minutes and then heated to 60°C at a rate of 2°C/min. After 15 minutes at 60°C, the temperature was maintained for a further 45 minutes, then a sodium carbonate solution was added and maintained for a further 45 minutes. The fabric was then washed cold, then treated for neutralization, followed by hot washing, soaping and cold washing.

In the examples, a linear non-functional silicone oil is used.

Color and fastness results:

The light fastness was measured according to ISO 105 B02BW, and the washing fastness was measured according to AATCC61 2A (49 degrees, 45 minutes).

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Claims (10)

1. A method for dyeing a cotton-containing textile material, wherein the textile material is treated with a liquid containing at least one reactive dye, at least one silicone oil, at least one surfactant and water. 2. The method according to claim 1, wherein the dyeing comprises the following steps: (a) incubating a textile material with a liquid comprising at least one reactive dye, at least one silicone oil, at least one surfactant and water, (b) heating the mixture of step (a), preferably to a temperature of 60 to 100°C. 3. The method according to claim 2, wherein the concentration of the at least one surfactant in the liquid is 0.1 to 5.0 g/L, preferably 2 to 4 g/L. 4. The method according to claim 2 or 3, further comprising the following steps: (c) adding a base, preferably at a temperature lower than the temperature in step (b); (d) neutralizing and washing the textile material. 5. The method according to any one of the preceding claims, wherein the weight ratio of the at least one silicone oil to water is from 75:25 to 90:10, preferably from 85:15 to 90:10. 6. A method according to any one of the preceding claims, wherein the weight ratio of cotton-containing textile material to liquid is from 1:10 to 1:35. 7. A method according to any one of the preceding claims, wherein the amount of the at least one reactive dye in the liquor is from 0.01 to 15 wt. %, based on the total weight of the fabric. 8. The process according to claim 1 , wherein the at least one reactive dye is selected from the group consisting of AVITERAYELLOW SE, AVITERA Red SE, AVITERA Blue SE, AVITERA Deep Blue SE, AVITERA DeepSea SE, AVITERA Navy SE, AVITERA Orange SE, AVITERA Black SE, AVITERA Rose SE, NOVACRON Yellow S-3R, NOVACRON Yellow EC-2R, NOVACRON Bold Yellow, NOVACRON DeepRed EC-D, reactive Red 239, NOAVCRON Bold Red, NOAVRON Blue EC-R, NOVACRON DeepBlue S-DC, NOVACRON Navy S-G, NOVACRON Bold Navy, NOAVCRON Bold Deep Navy, NOVACRON Deep night S-R, NOVACRON Scarlet EC-6G, NOVACRON Ruby S-3B, NOVACRONOrange EC-3R, NOVACRON Deep Orange S-4R, NOVACRON Brown C-7R, NOVACRON Red EC-2BL, NOVACRON Red WIN, NOVACRON Navy EC-BN, NOVACRON Dark Blue S-DC, NOVACRON Navy S-G, NOVACRON Bold Navy, NOVACRON Bold Deep Navy, NOVACRON Deep Night S-R, NOVACRON Scarlet EC-6G S-GL, NOVACRONSuper Black G, NOVACRON Super Black R and NOVACRON Black W-NN. 9. The method according to any one of the preceding claims, wherein the cotton-containing textile material consists of cotton or comprises a cotton blended fabric; preferably, wherein the cotton is blended with a polyester fabric. 10. A dyed cotton-containing textile material obtainable according to the process according to any one of claims 1 to 8.