Spandex dyeing agent for brocade spandex fabric and preparation method and application of spandex dyeing agent

Abstract

The invention discloses a spandex dye-uptake for brocade spandex fabric and a preparation method and application of the spandex dye-uptake, and belongs to the technical field of printing and dyeing assistants, and the spandex dye-uptake is prepared by taking long-carbon-chain cationic quaternion, a long-carbon-chain surfactant, a stabilizer and a solvent as raw materials. The long-carbon-chain cationic quaternion contained in the dye-uptake agent has quaternary ammonium salt cationic groups and can react with acid dye, and the reactant can be adsorbed with spandex fibers for coloring; meanwhile, the contained stabilizer is used as a leveling agent of the acid dye to promote uniform dyeing of the dye; on the other hand, the compatibility of the dye-uptake agent and the acid dye in the dye bath is effectively adjusted, the chemical stability of the dye liquor is greatly improved, and color spots can be effectively prevented, so that one-bath synchronous dyeing of the chinlon and the spandex is realized; the preparation method is simple, only needs mixing and stirring, does not need special equipment, and is easy for industrial production.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of printing and dyeing auxiliaries, in particular to a spandex dyeing agent for brocade spandex fabric and a preparation method and application thereof. BACKGROUND

[0002] Spandex is the abbreviation of polyurethane fiber, which is widely used in various elastic garment fabrics due to its excellent high elongation and elasticity. Spandex is a block copolymer structure composed of hydrophobic soft segments (providing elasticity) and structurally compact hard segments (acting as nodes) irregularly. There are no ionic groups and strong hydrophilic groups in its molecular structure, and it belongs to hydrophobic fiber. The molecular structure of spandex contains a certain amount of polar groups, which can form hydrogen bonds and dipole force with dye molecules. Although the hard segment has more polar groups, the structure is compact, and it is difficult for dyes to enter; although the soft segment has a loose structure, the binding force with dyes is not strong. This structural characteristic has made the dyeing of spandex a technical problem.

[0003] At present, the most suitable dye for spandex dyeing is disperse dye, but the binding force between disperse dye and spandex is weak, and the wet fastness is very poor, often appearing white and colorless phenomenon, which is difficult to meet the requirements of high-grade fabrics. In order to solve the problem of uniformity of brocade spandex fabric, the existing technology mostly adopts two-bath dyeing process. This process has the obvious shortcomings of long process, high energy consumption, large water consumption, much waste water, complex color control and difficult to achieve consistent color shade.

[0004] In view of this problem, a spandex dyeing agent is provided, which is green, has excellent dyeing performance, and can realize high-efficiency one-bath simultaneous dyeing of brocade spandex fabric. SUMMARY

[0005] The purpose of the present application is to provide a spandex dyeing agent for brocade spandex fabric and a preparation method and application thereof, so as to solve the problems in the background art.

[0006] In order to achieve the above-mentioned purpose, the present application provides a spandex dyeing agent for brocade spandex fabric, which comprises the following components by weight: Long carbon chain cationic quaternary ammonium compound 40-70 parts, long carbon chain surfactant 5-15 parts, stabilizer 4-10 parts, solvent 5-15 parts, deionized water 10-30 parts.

[0007] Preferably, the structure of the long carbon chain cationic quaternary ammonium compound is: .

[0008] Preferably, the long carbon chain surfactant is C12-C18 fatty alcohol polyoxyethylene ether.

[0009] Preferably, the structure of the stabilizer is: ; Where R is a C18 saturated alkane, and a+b=15.

[0010] Preferably, the solvent is diethylene glycol monobutyl ether.

[0011] This invention also provides a method for preparing the above-mentioned spandex dyeing agent for nylon-spandex fabrics, comprising the following steps: S1. Add long-chain surfactant, solvent and deionized water to the reaction vessel and stir for 20-40 minutes; S2. Then add long-chain cationic quaternary ammonium compounds and stabilizers, and continue stirring for 20-40 minutes to obtain spandex dyeing agent.

[0012] The present invention also provides the application of the above-mentioned spandex dyeing agent for nylon-spandex fabrics, which is applied to the one-bath dyeing of nylon-spandex fabrics.

[0013] Preferably, the specific steps for applying spandex dyeing agent to nylon-spandex fabrics using a one-bath dyeing method are as follows: 1) Add the dissolved acidic dye to the dye bath in advance and adjust the pH to 4-5; 2) Add the nylon-spandex fabric to be dyed and the spandex dyeing agent, and slowly heat it to 95~98℃ at a heating rate of 0.5℃ / min, keep it at that temperature for 40~60min, and then cool it down to 75~80℃; 3) Add an acidic fixing agent to fix the color for 15-25 minutes, then drain the liquid, wash with water, fix and dry to obtain the dyed nylon spandex finished fabric.

[0014] Preferably, in S1, glacial acetic acid is used to adjust the pH.

[0015] Preferably, in step S2, the amount of spandex dye added is 0.5-2% of the total mass of the dye bath.

[0016] Therefore, the spandex dyeing agent for nylon-spandex fabrics, its preparation method, and its application, as disclosed in this invention, have the following beneficial effects: (1) The present invention uses a reaction between a long-chain cationic quaternary ammonium compound of a specific component and an acid dye anion to form a “lake” that can be adsorbed by the swollen spandex fiber under high heat conditions and fixed by van der Waals forces and hydrogen bonds. This invention successfully realizes the one-bath simultaneous dyeing of nylon and spandex components using a single acid dye, and completely solves the cumbersome and energy-consuming problems of the traditional two-bath process.

[0017] (2) The long-chain cationic quaternary ammonium compound contained in the dyeing agent prepared in this invention has quaternary ammonium salt cationic groups, which can react with acid dyes. The reactant can be adsorbed and dyed with spandex fibers. At the same time, the stabilizer contained in the dyeing agent serves as a leveling agent for acid dyes, promoting uniform dyeing. On the other hand, it effectively harmonizes the compatibility between the dyeing agent and acid dyes in the dye bath, greatly improving the chemical stability of the dye bath and effectively preventing the generation of color spots, thereby realizing one-bath simultaneous dyeing of nylon and spandex.

[0018] (3) The preparation method of the present invention is simple, requiring only mixing and stirring, without special equipment, and is easy to industrialize. In terms of application, the one-bath dyeing process significantly reduces the consumption of water, electricity, and steam and the discharge of wastewater compared with the two-bath process, which is in line with the development direction of clean and energy-saving printing and dyeing industry in modern times.

[0019] The technical solution of the present invention will be further described in detail below through embodiments. Detailed Implementation

[0020] The technical solution of the present invention will be further described below through embodiments.

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are some embodiments of the present invention, but not all embodiments.

[0022] Example 1 In this embodiment, the following raw materials are included by weight: 45 parts of long-chain cationic quaternary ammonium compound, 8 parts of long-chain surfactant, 6 parts of stabilizer, 7 parts of solvent, and 20 parts of deionized water; the specific steps are as follows: S1. In a four-necked flask equipped with a stirrer, thermometer and condenser, add the C12-C18 fatty alcohol polyoxyethylene ether, diethylene glycol monobutyl ether and deionized water in the above proportions in sequence; turn on the stirrer and control the speed at 200 r / min, stir at room temperature (25°C) for 30 min to make the materials fully mixed. S2. Subsequently, while stirring, slowly add the long-chain cationic quaternary ammonium compound and stabilizer, and continue stirring for 30 minutes to obtain the spandex dyeing agent.

[0023] Comparative Example 1 This comparative example, by weight, includes the following raw materials: 45 parts of long-chain cationic quaternary ammonium compound, 8 parts of long-chain surfactant, 0 parts of stabilizer, 7 parts of solvent, and 25 parts of deionized water; the specific preparation steps are the same as in Example 1.

[0024] Application Example 1 The spandex dyeing agent prepared in Example 1 above is applied to nylon fabric, and the specific steps are as follows: 1) Add the dissolved acidic dye to the dye bath in advance, and adjust the pH to 4 with glacial acetic acid; 2) Add the nylon fabric to be dyed and spandex yarn, as well as 0.5% spandex dyeing agent of the total mass of the dye bath. Slowly heat the mixture to 98℃ at a heating rate of 0.5℃ / min, then keep it at this temperature for 50 minutes, and then cool it down to 75℃. 3) Add an acidic fixing agent to fix the color for 20 minutes, then drain the liquid, wash with water, fix and dry to obtain the dyed nylon spandex finished fabric.

[0025] Application Comparative Example 1 The spandex dyeing agent prepared in Comparative Example 1 was applied to nylon fabric, and the specific steps were as follows: 1) Add the dissolved acidic dye to the dye bath in advance, and adjust the pH to 5 with glacial acetic acid; 2) Add the nylon fabric to be dyed and spandex yarn, as well as 0.5% spandex dyeing agent of the total mass of the dye bath. Slowly heat the mixture to 98℃ at a heating rate of 0.5℃ / min, then keep it at this temperature for 50 minutes, and then cool it down to 75℃. 3) Add an acidic fixing agent to fix the color for 20 minutes, then drain the liquid, wash with water, fix and dry to obtain the dyed nylon spandex finished fabric.

[0026] The fabrics treated in Application Example 1 and Application Comparative Example 1 were subjected to coloring tests, and the results are shown in Table 1 below.

[0027] ;

[0028] As shown in the table above, using the dyeing agent of Example 1, the K / S values ​​of nylon and spandex are very close, and the fabric surface is uniform and clean, proving its excellent simultaneous dyeing ability and dye liquor stability. In contrast, using Comparative Example 1, which lacks a stabilizer, although the spandex also has a certain amount of dyeing, serious color spots and uneven coloring quality problems appear on the fabric surface. This proves that a specific stabilizer is an indispensable key component for ensuring dyeing quality.

[0029] Therefore, this invention provides a spandex dyeing agent for nylon and spandex fabrics, its preparation method, and its application. The long-chain cationic quaternary ammonium compound contained in the prepared dyeing agent has quaternary ammonium salt cationic groups, which can react with acid dyes. This reactant can be adsorbed and dyed onto spandex fibers. At the same time, the stabilizer contained in the dyeing agent acts as a leveling agent for acid dyes, promoting uniform dyeing. On the other hand, it effectively harmonizes the compatibility between the dyeing agent and acid dyes in the dye bath, greatly improving the chemical stability of the dye bath and effectively preventing the generation of color spots, thereby achieving simultaneous one-bath dyeing of nylon and spandex. The preparation method of this invention is simple, requiring only mixing and stirring, without the need for special equipment, and is easy to industrialize. In terms of application, the one-bath dyeing process significantly reduces the consumption of water, electricity, and steam, as well as the discharge of wastewater, compared to the two-bath process, which is in line with the development direction of clean and energy-saving printing and dyeing industry in modern times.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solutions of the present invention, and these modifications or equivalent substitutions cannot cause the modified technical solutions to deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. A spandex dyeing agent for a polyamide-spandex fabric, characterized by comprising: By weight parts, including the following components: Long carbon chain cationic quaternary ammonium 40~70 parts, long carbon chain surfactant 5~15 parts, stabilizer 4~10 parts, solvent 5~15 parts, deionized water 10~30 parts.

2. The spandex dyeing agent for spandex fabric according to claim 1, characterized in that: The structural formula of the long carbon chain cationic quaternary ammonium is: 。 3. The spandex dyeing agent according to claim 1, wherein: the spandex dyeing agent is used for dyeing a spandex fabric. The long carbon chain surfactant is C12-C18 fatty alcohol polyoxyethylene ether.

4. The spandex dyeing agent according to claim 1, wherein: The structural formula of the stabilizer is: ； Wherein, R is C18 saturated alkane, a+b=15.

5. The spandex dyeing agent according to claim 1, wherein: the spandex dyeing agent is used for dyeing a spandex fabric. The solvent is diethylene glycol monobutyl ether.

6. A process for the preparation of a spandex dyeing agent for spandex-containing fabrics according to any one of claims 1 to 5, characterized in that, Including the following steps: S1, adding long carbon chain surfactant, solvent and deionized water in the reaction container, stirring for 20~40min; S2, then add long carbon chain cationic quaternary ammonium and stabilizer, continue to stir for 20~40min, discharge to get spandex dyeing agent.

7. Use of a spandex dyeing agent for a spandex-containing fabric, characterized in that: The spandex dyeing agent prepared by claim 6 is applied to one-bath dyeing of spandex fabric.

8. Use according to claim 7, characterized in that: The specific steps of applying the spandex dyeing agent to one-bath dyeing of spandex fabric are: 1) Add dissolved acid dyes in the dye bath in advance, adjust pH to 4~5; 2) Add spandex fabric to be dyed and spandex dyeing agent, slowly heat to 95~98℃ at a heating rate of 0.5℃ / min, keep warm for 40~60min, then cool to 75~80℃; 3) Add acid fixing agent for fixing 15~25min, then drain, wash, and dry to get dyed spandex fabric.

9. Use according to claim 8, characterized in that: In S1, use glacial acetic acid to adjust pH.

10. Use according to claim 8, characterized in that: In S2, the amount of spandex dyeing agent added is 0.5~2% of the total mass of the dye bath.

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