KR20210147766A - Cationizing agents for dyeing textiles with minimal amount of neutral salt, preparation method thereof, and method for dyeing textiles using same - Google Patents

Abstract

The present invention relates to a new cationic agent for textile dyeing that can reduce a usage amount of neutral salt when dyeing textiles with reactive dyes or direct dyes, and a textile dyeing method using the same. When using a new polymer-type cationic agent in accordance with the present invention, the present invention, when dyeing the textile, allows a usage amount of neutral salt such as sodium sulfate to be reduced by more than 50% compared to a conventional textile dyeing method, thereby directly improving an environmental damage caused by excessive use of the neutral salt.

Description

A cationizing agent for textile dyeing that reduces the amount of neutral salt used, a manufacturing method thereof, and a textile dyeing method using the same

The present invention relates to a novel cationizing agent for textile dyeing, which can reduce the amount of neutral salt used when dyeing fibers with reactive dyes or direct dyes, and a textile dyeing method using the same.

In the textile dyeing method using reactive dyes and direct dyes, neutral salt electrolytes such as _{sodium chloride (NaCl) or sodium sulfate (Na 2} SO _{4 ) are used.} The fundamental reason why a neutral salt electrolyte is used is as follows. First, since the surface of cellulosic fibers such as cotton has anionicity, a neutral salt is used to function as a neutralizing agent. Scientifically, this is to improve substantivity. Since both reactive dyes and direct dyes have anionic properties, neutral salts must neutralize the surface charge of cotton fibers so that dyes can access cotton fibers. Second, when an excess of neutral salt is present in the dyeing bath, the amount of cations increases to inhibit dissociation of the dye, thereby increasing the affinity with the fiber. Third, in the case of reactive dyes whose dyeing is completed through a substitution reaction with fibers, the neutral salt plays a catalytic role by stabilizing the transition state of these chemical reactions.

For the above reasons, in the dyeing method with reactive dyes and direct dyes, an excessive amount of neutral salt (at least 90 g/L or more, for example, when dyeing 1,000 kg of cotton fiber, 480 to 540 kg (bath ratio = 1:6)) is essential. . The main role of the neutral salt is to neutralize the surface charge of the fiber so that the dye can access the cotton fiber, but a neutral salt such as sodium sulfate has strong hygroscopicity and hardens when it absorbs moisture in the air. is extremely reduced. In addition, since neutral salt is the root cause of deterioration of fiber fastness, a significant amount of water is used to remove medium fiber salt, and disruption of the ecosystem due to such wastewater cannot be avoided.

On the other hand, both reactive dyes and direct dyes cannot obtain an appropriate level of dyeability without the aid of a neutral salt for the above reasons. In order to dye reactive dyes or direct dyes without the aid of neutral salts, the functional groups of fibers must be modified with cations.

For example, WO2016/085099 discloses a method for cationically modifying cellulose using β-chloroethyl-trialkylammonium chloride hydro.

However, if the cellulosic fiber is modified through covalent bonding with a conventionally known quaternary ammonium-based cationizing agent, the directivity of the dye is very large, and it is very difficult to obtain leveling property, which is the biggest cause of the dyeing accident. For example, there is a large difference from actual dyeing using a neutral salt, such as ring dyeing or color change in the fiber, so significant tuning is required.

WO 2006-085099 A1

Accordingly, the present inventors have researched to develop a fiber dyeing method that minimizes the amount of neutral salt and at the same time has excellent leveling properties. % or more, and the present invention was completed by confirming that the dyeability was also excellent.

In order to achieve the above object, the present invention provides a cationizing agent for dyeing fibers represented by the following [Formula 1] or [Formula 2]:

[Formula 1]

In the above [Formula 1],

R ₁ is an amine group,

R ₂ is a polyethylene glycol residue or a polyethylene glycol alkylate residue,

X is a monovalent anion,

a, b and c are each a molar ratio of the monomers, a is 0 to 10%, b is 50 to 85%, c is 15 to 40%.

[Formula 2]

In the above [Formula 2],

R ₃ is a polyethylene glycol residue or a polyethylene glycol alkylate residue,

d and e are each a molar ratio of monomers, d is 5 to 50%, and e is 50 to 95%.

In addition, the present invention, based on 100 parts by weight of diallyldimethylammonium chloride (DADMAC), polyethylene glycol allyl ether, or polyethylene glycol-substituted (meth) acrylic ester 10 to 30 parts by weight; 1 to 3 parts by weight of allylamine hydrochloride; and 50 to 80 parts by weight of distilled water to form a monomer mix; and obtaining a random copolymer by adding ammonium persulfate (APS) to the formed monomer mix.

In addition, the present invention provides a fiber dyeing method comprising the step of putting the cationizing agent for fiber dyeing in a salt bath and pretreating the fiber at 20 °C to 100 °C.

In addition, the present invention provides a fiber dyeing method comprising the step of dyeing the fiber at 40 ℃ to 100 ℃ after the cationizing agent for fiber dyeing, a neutral salt and a dye are added to a dye bath.

The use of the novel polymeric cationizing agent according to the present invention can reduce the amount of neutral salt such as sodium sulfate when dyeing fibers, thereby suppressing corrosion of the dyeing machine and other pipes by the neutral salt electrolyte solution. In addition, efficient dyeing is possible by reducing the labor and time required to inject neutral salt into the dyeing machine, and it is possible to maximize productivity by reducing water consumption, energy and process time, as well as improving the washability of the object to be dyed due to excessive use of neutral salt. have. In addition, even if a minimum amount of neutral salt is used, it has excellent dyeability without occurrence of uneven salts such as ring dyeing and discoloration.

1 is a diagram schematically illustrating the dyeing and washing process of a standard to-be-dyed material according to a conventional dyeing method.
Figure 2 is a view briefly showing an example of the pretreatment, dyeing and washing process of the to-be-dyed material using the random copolymer A of [Formula 1] according to the present invention.
3 is a diagram schematically illustrating an example of a pre-treatment of a to-be-dyed object using a random copolymer A or a random copolymer B according to the present invention, a single bath method of dyeing, and a water washing process.

One aspect of the present invention provides a cationizing agent for dyeing fibers represented by the following [Formula 1] or [Formula 2]:

[Formula 1]

R ₁ is an amine group,

R ₂ is a polyethylene glycol residue or a polyethylene glycol alkylate residue,

X is a monovalent anion,

a, b and c are each a molar ratio of the monomers, a is 0 to 10%, b is 50 to 85%, c is 15 to 40%.

[Formula 2]

In the above [Formula 2],

R ₃ is a polyethylene glycol residue or a polyethylene glycol alkylate residue,

d and e are each a molar ratio of monomers, d is 5 to 50%, and e is 50 to 95%.

In [Formula 1], X may be a monovalent anion, but is not limited thereto, and specifically, may be a halogen ion (F ⁻ , Cl ⁻ ), sulfate (SO ₄ ⁻ ), or the like.

The cationizing agent for fiber dyeing represented by the [Formula 1] or [Formula 2] may reduce the amount of neutral salt used when dyeing fibers with a reactive dye or a direct dye. In addition, even if a minimum amount of neutral salt is used, it is possible to have excellent dyeability without occurrence of uneven salts such as ring dyeing and discoloration.

As used herein, the term "cationizing agent" is a material for modifying a predetermined object, for example, a cellulosic fiber with a cation, and is used interchangeably with a cationic polymer.

As used herein, the term "reactive dye" refers to a dye that causes a chemical reaction with a fiber during dyeing to fix it, and has a reactive active group in the dye molecule. Most of the reactors currently used are vinyl sulfone-based, triazine-based, pyrimidine-based and the like. Reactive dyes are mainly used for cotton, hemp, ramie, rayon, silk, and Korean paper, and are dyed by covalent bonding with fibers in a salt bath in the presence of alkali. It dissolves well in water and has better fastness than direct dyes. In addition, it has the advantages of vivid colors, excellent permeability and leveling properties, and a wide range of dyeable fibers.

As used herein, the term "direct dye" is a dye that is directly dyed on cellulosic fibers such as cotton, hemp, and rayon under a neutral salt such as sodium sulfate or sodium chloride. Chemically, most of them are azo compounds, and most of them are diazo and triazo compounds, and sodium sulfonate is bound to have water solubility. Direct dyes can directly dye fibers such as cotton by hydrogen bonding without the aid of alkali.

In addition, when dyeing fibers, a large amount of neutral salt of 90 g/L or more is usually used, but when the polymer cationizing agent of the present invention is used, the amount of neutral salt used can be reduced to 50% or less.

Specifically, the amount of neutral salt used when dyeing fibers using the polymer cationizing agent of the present invention is not limited thereto, but is reduced to 60 g/L or less, preferably 50 g/L or less, more preferably 40 g/L or less. can do it

The neutral salt is not limited thereto, but may be _{sodium sulfate (Na 2} SO _{4 ).}

The cationizing agent for fiber dyeing represented by the [Formula 1] or [Formula 2] is polyethylene glycol allyl ether, or a copolymer of polyethylene glycol-substituted (meth) acrylate and diallyldimethylammonium chloride, as an example random It may be a copolymer. The copolymer may be polymerized by a radical initiator.

The molar ratios a, b and c of the monomers in [Formula 1] of the present invention are not limited thereto, but each a may be 0 to 10%, 5 to 10%, or 3 to 8%, and b is 50 to 85 %, 50 to 80% or 53 to 80%, and c may be 15 to 40%, 15 to 40% or 17 to 40%.

The molar ratios d and e of the monomers in [Formula 2] of the present invention are not limited thereto, but each d may be 5 to 50%, 10 to 45%, 15 to 40%, or 20 to 35%, and e is 50 to 95%, 55 to 90%, 60 to 85% or 65 to 80%.

The average molecular weight of the cationizing agent for fiber dyeing represented by [Formula 1] or [Formula 2] is not limited thereto, but may be 1,000 to 200,000 g/mol, 2,000 to 150,000 g/mol, or 5,000 to 100,000 g/mol. have.

The cationizing agent for fiber dyeing represented by the [Formula 1] or [Formula 2] can cationize the surface charge of the cellulosic fiber by electrostatic attraction and weak ionic bonding ability.

Specifically, the bonding between the polymeric cationizing agent represented by the above [Formula 1] or [Formula 2] and the cellulosic fiber is not a chemical (covalent) bond, but may be a physical bond by electrostatic attraction between polar groups. On the other hand, the physical bonding ability with the cellulosic fiber by electrostatic attraction may decrease as the steric hindrance of the substituents of the quaternary ammonium salt increases. Since the polymer-type cationizing agent is a polymer, it may not be able to enter into the cellulosic fibers such as cotton fibers and may be bound to the surface of the cellulosic fibers.

In this case, the cellulosic fiber and the polymeric cationizing agent are bonded to the fiber surface by electrostatic attraction, but adsorption and desorption occur by the temperature and water during the dyeing process, thereby reducing the directness with the dye.

In addition, the bonding between the cation adsorbed on the fiber surface and the anion of the dye by directness at the beginning of dyeing can ensure the leveling property because adsorption and desorption are easily performed at the dyeing temperature. That is, since the polymeric cationizing agent gives limited directness by physical bonding force rather than strong directness by chemical (covalent) bonding with cellulosic fibers, the directivity of the dye in the prior art is very large to obtain leveling. Difficult essential problems can be overcome.

Furthermore, when existing cationic polymers meet anionic dyes, they cause rapid aggregation and cause _{ionic troubles that push the dye out of the H 2} O phase or tarring, whereas the fiber dye of the present invention The cationizing agent is a cationizing agent for textile dyeing represented by [Formula 1] or [Formula 2], and it is possible to minimize the occurrence of such ion troubles.

Another aspect of the present invention provides a method for producing the cationizing agent for dyeing the fibers.

Specifically, the method for preparing a cationizing agent for fiber dyeing represented by [Formula 1] or [Formula 2] is polyethylene glycol allyl ether, or polyethylene glycol based on 100 parts by weight of diallyldimethylammonium chloride (DADMAC). 10 to 30 parts by weight of a substituted (meth)acrylic ester; 1 to 3 parts by weight of allylamine hydrochloride; and 50 to 80 parts by weight of distilled water to form a monomer mix; and adding ammonium persulfate to the formed monomer mix to obtain a random copolymer.

As used herein, the term "monomer" is a low molecular weight material that becomes a unit constituting a high molecular compound through a chemical reaction, for example, polydiallyldimethylammonium chloride is obtained by addition polymerization of diallyldimethylammonium chloride In this case, diallyldimethylammonium chloride is referred to as a monomer of polydiallyldimethylammonium chloride.

As used herein, the term “monomer mix” refers to a mixture in which one or more monomers are mixed, for example, a mixture in which diallyldimethylammonium chloride and (meth)acrylate monomers substituted with polyethylene glycol are mixed as a monomer. It's called a mix.

Specifically, the monomer mix for preparing the cationizing agent for fiber dyeing represented by [Formula 1] is based on 100 parts by weight of diallyldimethylammonium chloride, 10 to 30 parts by weight of polyethylene glycol allyl ether; 1 to 3 parts by weight of allylamine hydrochloride; and 50 to 80 parts by weight of distilled water.

In addition, the monomer mix for preparing the cationizing agent for fiber dyeing represented by [Formula 2] is based on 100 parts by weight of diallyldimethylammonium chloride, polyethylene glycol-substituted methacrylic ester or polyethylene glycol-substituted acrylic ester 10 to 30 parts by weight; 1 to 3 parts by weight of allylamine hydrochloride; and 50 to 80 parts by weight of distilled water.

The cationizing agent for fiber dyeing represented by [Formula 1] or [Formula 2] is a random copolymer by adding ammonium persulfate (APS) as a radical initiator to each of the above-formed monomer mixes to initiate a polymerization reaction. have.

Another aspect of the present invention provides a fiber dyeing method comprising the step of putting the cationizing agent for fiber dyeing into a salt bath and pretreating the fiber at 20°C to 100°C.

The cationizing agent for fiber dyeing may be pre-treated to the fiber for the purpose of cationic modification of the fiber before the dyeing step using a reactive dye or a direct dye.

The cationizing agent for textile dyeing of the present invention is not limited thereto, but the solid content may be 1 to 90% by weight, 5 to 70% by weight, 10 to 50% by weight, preferably 15 to 30% by weight, or 20% by weight. have.

In addition, the cationizing agent is added in an amount of 0.01 to 20% by weight, 0.05 to 10% by weight, 0.07 to 5% by weight, 0.08 to 2% by weight, or 0.09 to 1% by weight relative to the fiber weight (owf, on weight fabric) can be

The fiber pretreatment may be performed at, but not limited to, 20° C. to 100° C., 40° C. to 80° C., or 50° C. for, for example, 5 to 30 minutes, 10 to 20 minutes, or 15 minutes.

Another aspect of the present invention provides a fiber dyeing method comprising the step of dyeing the fiber at 40 ℃ to 100 ℃ after adding the cationizing agent for fiber dyeing, a neutral salt and a dye to a dye bath.

The cationizing agent for fiber dyeing of the present invention may be added together in the step of dyeing the fiber using a reactive dye or a direct dye. That is, when dyeing fibers, it is possible to proceed with dyeing by simultaneous treatment in one salt bath without the need for a separate pre-treatment step for cationic modification of the target fibers.

The cationizing agent for textile dyeing of the present invention is not limited thereto, but a solution diluted so that the solid content is 1 to 90% by weight, 5 to 70% by weight, 10 to 50% by weight, 15 to 30% by weight, or 20% by weight can be used as

In addition, the cationizing agent for fiber dyeing of the present invention is 0.01 to 20% by weight, 0.05 to 10% by weight, 0.07 to 5% by weight, 0.08 to 2% by weight, or 0.09 to 1% by weight relative to the fiber weight (owf, on weight fabric) % may be added.

In addition, when used together with the cationizing agent for dyeing fibers of the present invention, the neutral salt is not limited thereto, but may be used at a concentration of 60 g/L or less, 50 g/L or less, or 40 g/L or less.

Fiber dyeing using the composition for dyeing fibers of the present invention is not limited thereto, but may be performed at 40°C to 100°C, 50°C to 70°C, or 60°C, for example, 10 to 90 minutes, 30 to 80 minutes, or It can be carried out for 60 minutes.

When dyeing fibers using the composition for dyeing fibers of the present invention, the target fibers are immersed in a dye bath under predetermined temperature and time conditions before dyeing, or a pad-dry-cure (PDC) method is used. It can be dyed after pretreatment.

The fiber may be a cellulosic fiber.

The cellulosic fibers include, but are not limited to, cotton, ramie, wood-pulp, viscose rayon, cuprammonium rayon and acetate rayon. may be any one of

The cationizing agent for textile dyeing represented by [Formula 1] or [Formula 2] of the present invention can be implemented as a functional dye that can be dyed at a low neutral salt concentration by adding it to the dye when commercializing it and commercializing it.

Hereinafter, the present invention will be described in more detail with reference to the following examples. However, the following examples are only for illustrating the present invention, and the scope of the present invention is not limited thereto.

Preparation Example 1. Preparation of cationic random copolymer A

A stirrer, a cooler, and a thermometer were installed in a 4-neck flask with a capacity of 1.0 L. 100 g of 60% diallyldimethylammonium chloride, 20 g of polyethyleneglycol allyl ether and 2 g of allylamine hydrogenchloride salt were diluted with 60 g of distilled water, which was then diluted with a monomer mixture (monomer mixture). mix) was called A. 18 g of distilled water and monomer mix A were added to the flask and circulated with nitrogen gas. APS solution was prepared by diluting 0.2 g of ammonium persulfate (APS) in 70 g of distilled water.

The temperature was raised to 72 °C while circulating nitrogen, and the APS solution was added dropwise to the monomer mix A at 72 °C to 74 °C for 5 hours. After holding at 75° C. for an additional 3 hours, it was cooled to room temperature. Distilled water is added so that the concentration of the reactor becomes 20% by weight of the solid content, and the mixture is stirred for 10 minutes. Copolymer A was obtained at a concentration of 20%.

[Formula 1]

Preparation Example 2. Preparation of cationic random copolymer B

A stirrer, a condenser, and a thermometer were installed in a 4-neck flask with a capacity of 1.0 L. 100 g of 60% diallyldimethylammonium chloride, 20 g of polyethylene glycol-substituted (meth)acrylic ester, and 2 g of allylamine hydrochloride were diluted with 60 g of distilled water, which is called monomer mix B did 18 g of distilled water and monomer mix B were added to the flask and circulated with nitrogen gas. APS solution was prepared by diluting 0.2 g of ammonium persulfate (APS) in 70 g of distilled water.

The temperature was raised to 72 °C while circulating nitrogen, and the APS solution was added dropwise to the monomer mix B at 72 °C to 74 °C for 5 hours. After holding at 75° C. for an additional 3 hours, it was cooled to room temperature. Distilled water is added so that the concentration of the reactor becomes 20% by weight of the solid content, and the mixture is stirred for 10 minutes. Copolymer B was obtained at 20% concentration.

[Formula 2]

Comparative Example 1. Cellulose-based fiber dyeing according to the conventional dyeing method

Cellulose-based fiber (CM24S/1) after scouring and bleaching was treated with a dye combination as shown in Table 1 below and a neutral salt under the condition of a bath ratio of 1:10, sodium sulfate (Na ₂ SO ₄ ; also referred to as mungcho) ) and alkaline conditions (sodium carbonate (Na ₂ CO ₃ ) treatment as an alkali agent) at 60° C. for 60 minutes, followed by washing with water as shown in FIG. 1 . When washing with water, _{1 g/L of acetic acid (CH 3} COOH) and g/L of snopol were used as a soaping agent.

Specifically, the cellulosic fibers were stirred for 20 minutes at a temperature of 60° C. in the dye combination and sodium sulfate aqueous solution described in Table 1 below, sodium carbonate (Na ₂ CO ₃ ) was added, and further dyed at 60° C. for 1 hour. . The dyed cellulosic fibers were rinsed with water at 45°C for 10 minutes, acid-treated with an aqueous acetic acid solution containing acetic acid at a concentration of 1 g/L in water (neutralization), and 10 minutes using 1 g/L of a soaping agent at 95°C. After washing for minutes, it was washed with water at 85°C and 45°C. The material to be dyed according to the above process was used as a standard.

Experimental Example 1. Cellulose-based fiber dyeing using cationic random copolymer A during pretreatment

The cationic random copolymer A of [Formula 1] obtained in Preparation Example 1 was added to distilled water and diluted so that the solid content was 20%. Cellulose fibers (CM24S/1) that have been scoured and bleached are put in a bath ratio of 1:5, and the diluted cationic polymer solution is placed in a salt bath at a concentration of 0.5% owf (on weight fabric), and pretreated at 50° C. for 15 minutes. After washing, the salt bath was drained. At this time, the average moisture content of the pretreated fibers was 76.2%. Using the amount of sagebrush presented in the CCM data results in Table 2 below, the dye combination as shown in Table 1 and alkaline conditions were used for dyeing at 60° C. for 60 minutes. Thereafter, as shown in FIG. 2 , after washing with water, the color difference (ΔE) was compared with the standard coating material of Comparative Example 1 through computerized color matching (CCM) analysis.

* L (lightness) value of true black standard coating material = 13.42

* L value of Modern Red standard staining material = 35.80

* L value of Turquoise Blue standard coating material = 44.34

* L value of Royal Blue standard coating material = 28.79

In the CCM analysis, the case where the L value has little difference from the standard coated material and the ΔE value is 0.7 or less is generally recognized as having no color difference. As a result of comparing the standard coated material of Comparative Example 1 and the coated material of Experimental Example 1 through CCM analysis, the cationic random copolymer A of [Formula 1] according to the present invention was used for pretreatment before the fiber dyeing step. It was found that the same dyeing as the standard coating material could be obtained by using 0.5 times (ie, 40 g/L) of the amount of dried mulberry used.

Experimental Example 2. Cellulose-based fiber dyeing using cationic random copolymer A during dyeing

After scouring and bleaching the cellulosic fibers were dyed using the cationic random copolymer A of [Formula 1] as an electrolyte substitute under the conditions shown in Table 6 below, Na ₂ SO _{4 A} standard coating material using Na 2 SO 4 as an electrolyte (comparison The color difference with Example 1) was compared.

Specifically, as shown in FIG. 3 , the color difference (ΔE) was compared with the standard dyed object of Comparative Example 1 through CCM analysis after pretreatment and dyeing of the dyed product were performed by a one bath method (1 bath) and washed with water.

In Table 6 below, dyeing using the cationic random copolymer of [Formula 1] according to the present invention as an electrolyte substitute was referred to as low salt dyeing.

* ΔL; White (+L)/Black (-L)

* Δa; Red (+a)/Green (-a)

* Δb; Yellow (+b)/Blue (-b)

A standard to-be-dyeed product using 80 g/L Na ₂ SO _{4 , 56 g/L Na 2} SO ₄ and a cationic random copolymer A of [Formula 1] obtained from Preparation Example 1, using a bath method (1 bath) As a result of analyzing the dyed object with CCM spectroscopy, when the cationic polymer prepared in Preparation Example 1 was used, excellent dyeability was exhibited in the entire range of owf tested, especially 0.24% owf, despite the use of a small amount of sagebrush. It was confirmed that there was no color difference when using

Experimental Example 3. Cellulose-based fiber dyeing using cationic random copolymer B during dyeing

After scouring and bleaching the cellulosic fiber was dyed using the cationic random copolymer B of [Formula 2] as an electrolyte substitute under the conditions shown in Table 7 below, Na ₂ SO ₄ Standard coating material using Na 2 SO 4 as an electrolyte (comparison The color difference with Example 1) was compared.

Specifically, as shown in FIG. 3 , the color difference (ΔE) was compared with the standard dyed object of Comparative Example 1 through CCM analysis after pretreatment and dyeing of the object were performed by a one bath method (1 bath) and washed with water.

Meanwhile, in Table 7 below, dyeing using the cationic random copolymer of [Formula 2] according to the present invention as an electrolyte substitute was referred to as low-salt dyeing.

A standard to-be-dyeed product using 70 g/L Na ₂ SO _{4 , 50 g/L Na 2} SO ₄ and a cationic random copolymer B of [Formula 2] obtained from Preparation Example 2, using a bath method (1 bath) As a result of analyzing the dyed material with CCM spectroscopy, when the cationic polymer prepared in Preparation Example 2 was used, excellent dyeability was exhibited in the entire range of owf tested, especially 0.20% owf, despite the use of a small amount of ragweed. It was confirmed that there was no color difference when using

Experimental Example 4. Cellulose-based fiber dyeing using cationic random copolymer A and random copolymer B during dyeing

As shown in Tables 8 and 9 below, even in colors other than black color, the cationic random copolymers prepared in Preparation Examples 1 and 2 were used as an electrolyte substitute and dyed with Na ₂ SO ₄ . The color difference with the standard to-be-dyeed material (Comparative Example 1) used as an electrolyte was compared.

As a result of color difference comparison, the optimal concentration of the cationic polymer prepared in Preparation Examples 1 and 2 varies depending on the concentration of _{Na 2} SO ₄ used in the standard to-be-dyeed material, _{but in general, the concentration of Na 2} SO ₄ and Preparation Example 1 It was confirmed that the optimal concentration of the cationic polymer prepared in Preparation Example 2 is proportional.

Claims (11)

A cationizing agent for textile dyeing represented by the following [Formula 1] or [Formula 2]:
[Formula 1]

In the above [Formula 1],
R ₁ is an amine group,
R ₂ is a polyethylene glycol residue or a polyethylene glycol alkylate residue,
X is a monovalent anion,
a, b and c are each a molar ratio of the monomers, a is 0 to 10%, b is 50 to 85%, c is 15 to 40%.
[Formula 2]

In the above [Formula 2],
R ₃ is a polyethylene glycol residue or a polyethylene glycol alkylate residue,
d and e are each a molar ratio of monomers, d is 5 to 50%, and e is 50 to 95%. According to claim 1,
Cationic agent for textile dyeing, characterized in that the cationizing agent reduces the amount of neutral salt used when dyeing fibers with reactive dyes or direct dyes. 3. The method of claim 2,
A cationizing agent for textile dyeing, characterized in that the amount of neutral salt used is reduced to 60 g/L or less. 3. The method of claim 2,
The neutral salt is sodium sulfate (Na ₂ SO ₄ ), a cationizing agent for textile dyeing. According to claim 1,
The average molecular weight of the cationizing agent is 1,000 to 200,000 g / mol, a cationizing agent for fiber dyeing. According to claim 1,
The cationizing agent is a random copolymer, a cationizing agent for textile dyeing. 10 to 30 parts by weight of polyethylene glycol allyl ether or polyethylene glycol-substituted (meth)acrylic ester based on 100 parts by weight of diallyldimethylammonium chloride (DADMAC); 1 to 3 parts by weight of allylamine hydrochloride; and 50 to 80 parts by weight of distilled water to form a monomer mix; and
A method for producing a cationizing agent for fiber dyeing of claim 1, comprising; adding ammonium persulfate to the formed monomer mix to obtain a random copolymer. A method for dyeing fibers comprising the step of putting the cationizing agent for fiber dyeing of claim 1 into a salt bath and pretreating the fibers at 20°C to 100°C. A method for dyeing a fiber comprising the step of dyeing the fiber at 40°C to 100°C after the cationizing agent for fiber dyeing of claim 1, a neutral salt, and a dye are added to a dye bath. 10. The method according to claim 8 or 9,
The cationizing agent for fiber dyeing has a solid content of 1 to 90% by weight, and is added in an amount of 0.01 to 20% by weight based on the weight of the fiber, fiber dyeing method. 10. The method according to claim 8 or 9,
A fiber dyeing method, characterized in that the fiber is a cellulosic fiber.

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