CN113463415A - Acid dye dyeing auxiliary and preparation method thereof - Google Patents
Acid dye dyeing auxiliary and preparation method thereof Download PDFInfo
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- CN113463415A CN113463415A CN202110842451.XA CN202110842451A CN113463415A CN 113463415 A CN113463415 A CN 113463415A CN 202110842451 A CN202110842451 A CN 202110842451A CN 113463415 A CN113463415 A CN 113463415A
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
- D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
- D06P1/44—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders
- D06P1/64—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders using compositions containing low-molecular-weight organic compounds without sulfate or sulfonate groups
- D06P1/651—Compounds without nitrogen
- D06P1/65106—Oxygen-containing compounds
- D06P1/65131—Compounds containing ether or acetal groups
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
- D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
- D06P1/39—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using acid dyes
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
- D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
- D06P1/44—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders
- D06P1/60—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders using compositions containing polyethers
- D06P1/613—Polyethers without nitrogen
- D06P1/6131—Addition products of hydroxyl groups-containing compounds with oxiranes
- D06P1/6133—Addition products of hydroxyl groups-containing compounds with oxiranes from araliphatic or aliphatic alcohols
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
- D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
- D06P1/44—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders
- D06P1/64—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders using compositions containing low-molecular-weight organic compounds without sulfate or sulfonate groups
- D06P1/642—Compounds containing nitrogen
- D06P1/645—Aliphatic, araliphatic or cycloaliphatic compounds containing amino groups
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
- D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
- D06P1/44—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders
- D06P1/64—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders using compositions containing low-molecular-weight organic compounds without sulfate or sulfonate groups
- D06P1/642—Compounds containing nitrogen
- D06P1/649—Compounds containing carbonamide, thiocarbonamide or guanyl groups
- D06P1/6495—Compounds containing carbonamide -RCON= (R=H or hydrocarbons)
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
- D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
- D06P1/44—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders
- D06P1/653—Nitrogen-free carboxylic acids or their salts
- D06P1/6533—Aliphatic, araliphatic or cycloaliphatic
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
- Y02P70/62—Manufacturing or production processes characterised by the final manufactured product related technologies for production or treatment of textile or flexible materials or products thereof, including footwear
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Coloring (AREA)
Abstract
The invention discloses an acid dye dyeing auxiliary and a preparation method thereof, belonging to the technical field of textile materials. The acid dye dyeing auxiliary comprises the following components in parts by weight: 10-30 parts of rhamnolipid, 10-30 parts of fatty alcohol-polyoxyethylene ether, 2-8 parts of triethanolamine, 2-8 parts of acetic acid and 10-30 parts of caprolactam. The acid dye dyeing auxiliary agent contains various components, is added into acid dye, improves dyeing uptake and color fastness, has excellent color reproducibility, more universality of dye, more complete color spectrum and no damage to fiber quality.
Description
Technical Field
The invention relates to an acid dye dyeing auxiliary and a preparation method thereof, belonging to the technical field of textile materials.
Background
The dyeing process is a process of dyeing fiber materials with colors, and the whole textile becomes a colored object by the physical and chemical combination of dyes and fibers or by generating dyes on the fibers by a chemical method. The acid dye is a dye with acid groups on the structure, is used for dyeing in an acid medium and is mainly used for dyeing wool, silk, chinlon and the like. The acid red GR has high affinity to fabrics, can color silk in a weakly acidic medium, has dark color and high color fastness, but has poor color uniformity, and a surfactant is required to be added to slow down the dyeing rate of the silk so as to achieve the effect of level dyeing. Meanwhile, the surfaces of protein fabrics such as silk have certain hydrophobic impurities, so that dyes cannot be uniformly distributed on the fabrics.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide an acid dye dyeing auxiliary and a preparation method thereof.
In order to achieve the purpose, the invention adopts the technical scheme that: an acid dye dyeing auxiliary comprises the following components in parts by weight: 10-30 parts of rhamnolipid, 10-30 parts of fatty alcohol-polyoxyethylene ether, 2-8 parts of triethanolamine, 2-8 parts of acetic acid and 10-30 parts of caprolactam.
Rhamnolipids consist of one or two rhamnose molecules covalently bonded to one or two β -hydroxy fatty acids. The rhamnose group and the ionized carboxyl group enable the rhamnolipid molecule to have strong hydrophilicity, and the beta-hydroxydecanoyl-beta-hydroxydecanoyl ester is a nonpolar group, so that the rhamnolipid molecule has lipophilicity. The carboxyl with negative electricity in the rhamnolipid can be combined with the dyeing base with positive electricity on the silk fabric in an electrostatic manner, so that the dyeing base on the fiber is occupied in advance, the combination of the dye and the fiber is blocked, and the dye dyeing is delayed. In the dyeing process, the rhamnolipid is quickly combined with the fiber, but the combination force is not strong as that of dye molecules, and the rhamnolipid is gradually replaced from the fiber by the dye along with the increase of the temperature of a dye bath, so that the dye occupies a dye base to achieve the dyeing purpose.
The fatty alcohol-polyoxyethylene ether forms a surface film on the surface of the fiber, and the film can control the adsorption of the dye on the surface of the fiber, promote the dye transfer effect of the dye on the surface of the fiber and promote uniform adsorption. The rhamnolipid and the fatty alcohol-polyoxyethylene ether are compounded, and the fatty alcohol-polyoxyethylene ether can enhance the interaction with anionic acid dye, so that the effect of preventing the dye from quickly dyeing fibers is achieved.
The triethanolamine contains more hydroxyl and amino, can be combined with the dye to destroy hydrogen bonds between dye molecules and in the dye molecules, and is beneficial to the dissolution of the dye. The buffering solution compounded by triethanolamine and acetic acid can well adjust the pH value of the acid dye, so that the coloring of the acid dye is more uniform.
Caprolactam is used as one of the auxiliary agents, on one hand, to better dissolve the dye and to make the dye bond with the fiber better, and on the other hand, to enable triethanolamine to be stably mixed in the formula.
As a preferred embodiment of the acid dye dyeing assistant of the present invention, the acid dye dyeing assistant comprises the following components in parts by weight: 15-25 parts of rhamnolipid, 15-25 parts of fatty alcohol-polyoxyethylene ether, 3-6 parts of triethanolamine, 3-6 parts of acetic acid and 15-35 parts of caprolactam. Under the proportion, the acid dye dyeing auxiliary agent has better effect of improving the dye uptake and the dyeing fastness of the dye.
As a preferred embodiment of the acid dye dyeing assistant of the present invention, the acid dye dyeing assistant comprises the following components in parts by weight: 20 parts of rhamnolipid, 20 parts of fatty alcohol-polyoxyethylene ether, 5 parts of triethanolamine, 5 parts of acetic acid and 20 parts of caprolactam. Under the mixture ratio, the acid dye dyeing auxiliary agent has the best effect of improving the dye uptake and the dyeing fastness of the dye.
In a second aspect, the invention provides a preparation method of an acid dye dyeing auxiliary, which comprises the following steps:
(1) adding triethanolamine and acetic acid into a solvent, stirring uniformly, adding fatty alcohol-polyoxyethylene ether, stirring until the fatty alcohol-polyoxyethylene ether is completely dissolved, and defoaming to obtain a mixed solution 1;
(2) adding caprolactam into the solvent, stirring uniformly, adding rhamnolipid, stirring uniformly until the rhamnolipid is completely dissolved, and defoaming to obtain a mixed solution 2;
(3) and (3) adding the mixed solution 1 obtained in the step (1) into the mixed solution 2 obtained in the step (2) under a stirring state, and uniformly stirring to obtain the acid dye dyeing auxiliary agent.
Preferably, the rotation speed of the stirring in the step (1) is 1200-1500 rpm/min.
Preferably, the rotation speed of the stirring in the step (2) is 900-1200 rpm/min.
Preferably, the rotation speed of the stirring in the step (2) is 500-800 rpm/min.
Preferably, the solvent is water.
The stirring speed in the preparation process has certain influence on the performance of the acid dye dyeing auxiliary agent, the synthesis speed of the mixed solution 1 is the highest, the synthesis speed of the mixed solution 2 is intermediate, and the synthesis speed of the acid dye dyeing auxiliary agent is the lowest. The rotating speed is reduced step by step in the preparation process, the synthetic rotating speed is too high, the stability of the acid dye dyeing auxiliary agent is poor, and the coloring of the acid dye is not facilitated; the synthesis rotating speed is too low, the dispersion effect cannot be achieved, the components in the auxiliary agent are not uniformly dispersed, and the dye uptake and the dyeing fastness of the acid dye are affected.
Compared with the prior art, the invention has the beneficial effects that: the acid dye dyeing auxiliary agent contains various components, is added into acid dye, improves dyeing uptake and color fastness, has excellent color reproducibility, more universality of dye, more complete color spectrum and no damage to fiber quality.
Detailed Description
To better illustrate the objects, aspects and advantages of the present invention, the present invention will be further described with reference to specific examples.
Example 1
The invention provides an acid dye dyeing auxiliary agent, which comprises the following components in parts by weight: 20 parts of rhamnolipid, 20 parts of fatty alcohol-polyoxyethylene ether, 5 parts of triethanolamine, 5 parts of acetic acid and 20 parts of caprolactam.
The invention also provides a preparation method of the acid dye dyeing auxiliary agent, which comprises the following steps:
(1) adding triethanolamine and acetic acid into the solvent, stirring uniformly, adding fatty alcohol-polyoxyethylene ether, stirring at the stirring speed of 1200rpm/min until completely dissolving, and defoaming to obtain a mixed solution 1;
(2) adding caprolactam into the solvent, stirring uniformly, adding rhamnolipid, stirring uniformly at the stirring speed of 900rpm/min until the rhamnolipid is completely dissolved, and defoaming to obtain a mixed solution 2;
(3) and (3) adding the mixed solution 1 obtained in the step (1) into the mixed solution 2 obtained in the step (2) under a stirring state, and uniformly stirring at a stirring speed of 500rpm/min to obtain the acid dye dyeing auxiliary agent.
Example 2
The invention provides an acid dye dyeing auxiliary agent, which comprises the following components in parts by weight: 10 parts of rhamnolipid, 30 parts of fatty alcohol-polyoxyethylene ether, 2 parts of triethanolamine, 8 parts of acetic acid and 10 parts of caprolactam.
The invention also provides a preparation method of the acid dye dyeing auxiliary agent, which comprises the following steps:
(1) adding triethanolamine and acetic acid into the solvent, stirring uniformly, adding fatty alcohol-polyoxyethylene ether, stirring at stirring speed of 1500rpm/min until completely dissolving, and defoaming to obtain a mixed solution 1;
(2) adding caprolactam into the solvent, stirring uniformly, adding rhamnolipid, stirring uniformly at the stirring speed of 1200rpm/min until the rhamnolipid is completely dissolved, and defoaming to obtain a mixed solution 2;
(3) and (3) adding the mixed solution 1 obtained in the step (1) into the mixed solution 2 obtained in the step (2) under a stirring state, and uniformly stirring at a stirring rotating speed of 800rpm/min to obtain the acid dye dyeing auxiliary agent.
Example 3
The invention provides an acid dye dyeing auxiliary agent, which comprises the following components in parts by weight: 30 parts of rhamnolipid, 10 parts of fatty alcohol-polyoxyethylene ether, 8 parts of triethanolamine, 2 parts of acetic acid and 30 parts of caprolactam.
The invention also provides a preparation method of the acid dye dyeing auxiliary agent, which comprises the following steps:
(1) adding triethanolamine and acetic acid into the solvent, stirring uniformly, adding fatty alcohol-polyoxyethylene ether, stirring at the stirring speed of 1300rpm/min until completely dissolving, and defoaming to obtain a mixed solution 1;
(2) adding caprolactam into the solvent, stirring uniformly, adding rhamnolipid, stirring uniformly at the stirring speed of 1100rpm/min until the rhamnolipid is completely dissolved, and defoaming to obtain a mixed solution 2;
(3) and (3) adding the mixed solution 1 obtained in the step (1) into the mixed solution 2 obtained in the step (2) under a stirring state, and uniformly stirring at a stirring speed of 700rpm/min to obtain the acid dye dyeing auxiliary agent.
Example 4
The invention provides an acid dye dyeing auxiliary agent, which comprises the following components in parts by weight: 15 parts of rhamnolipid, 25 parts of fatty alcohol-polyoxyethylene ether, 4 parts of triethanolamine, 6 parts of acetic acid and 20 parts of caprolactam.
The invention also provides a preparation method of the acid dye dyeing auxiliary agent, which comprises the following steps:
(1) adding triethanolamine and acetic acid into the solvent, stirring uniformly, adding fatty alcohol-polyoxyethylene ether, stirring at the stirring speed of 1200rpm/min until completely dissolving, and defoaming to obtain a mixed solution 1;
(2) adding caprolactam into the solvent, stirring uniformly, adding rhamnolipid, stirring uniformly at the stirring speed of 900rpm/min until the rhamnolipid is completely dissolved, and defoaming to obtain a mixed solution 2;
(3) and (3) adding the mixed solution 1 obtained in the step (1) into the mixed solution 2 obtained in the step (2) under a stirring state, and uniformly stirring at a stirring speed of 500rpm/min to obtain the acid dye dyeing auxiliary agent.
Example 5
The invention provides an acid dye dyeing auxiliary agent, which comprises the following components in parts by weight: 25 parts of rhamnolipid, 15 parts of fatty alcohol-polyoxyethylene ether, 6 parts of triethanolamine, 4 parts of acetic acid and 20 parts of caprolactam.
The invention also provides a preparation method of the acid dye dyeing auxiliary agent, which comprises the following steps:
(1) adding triethanolamine and acetic acid into the solvent, stirring uniformly, adding fatty alcohol-polyoxyethylene ether, stirring at the stirring speed of 1200rpm/min until completely dissolving, and defoaming to obtain a mixed solution 1;
(2) adding caprolactam into the solvent, stirring uniformly, adding rhamnolipid, stirring uniformly at the stirring speed of 900rpm/min until the rhamnolipid is completely dissolved, and defoaming to obtain a mixed solution 2;
(3) and (3) adding the mixed solution 1 obtained in the step (1) into the mixed solution 2 obtained in the step (2) under a stirring state, and uniformly stirring at a stirring speed of 500rpm/min to obtain the acid dye dyeing auxiliary agent.
Comparative example 1
As a comparative example of an acid dye dyeing assistant according to the invention, this comparative example differs from example 1 only in that: the acid dye dyeing auxiliary comprises the following components in parts by weight: 40 parts of rhamnolipid, 5 parts of triethanolamine, 5 parts of acetic acid and 20 parts of caprolactam.
Comparative example 2
As a comparative example of an acid dye dyeing assistant according to the invention, this comparative example differs from example 1 only in that: the acid dye dyeing auxiliary comprises the following components in parts by weight: 40 parts of fatty alcohol-polyoxyethylene ether, 5 parts of triethanolamine, 5 parts of acetic acid and 20 parts of caprolactam.
Ratio of pairs 3
As a comparative example of an acid dye dyeing assistant according to the invention, this comparative example differs from example 1 only in that: the acid dye dyeing auxiliary comprises the following components in parts by weight: 35 parts of rhamnolipid, 5 parts of fatty alcohol-polyoxyethylene ether, 5 parts of triethanolamine, 5 parts of acetic acid and 20 parts of caprolactam.
Comparative example 4
As a comparative example of an acid dye dyeing assistant according to the invention, this comparative example differs from example 1 only in that: the acid dye dyeing auxiliary comprises the following components in parts by weight: 20 parts of rhamnolipid, 20 parts of fatty alcohol-polyoxyethylene ether, 10 parts of acetic acid and 20 parts of caprolactam.
Comparative example 5
As a comparative example of an acid dye dyeing assistant according to the invention, this comparative example differs from example 1 only in that: the acid dye dyeing auxiliary comprises the following components in parts by weight: 20 parts of rhamnolipid, 20 parts of fatty alcohol-polyoxyethylene ether, 10 parts of triethanolamine and 20 parts of caprolactam.
Comparative example 6
As a comparative example of an acid dye dyeing assistant according to the invention, this comparative example differs from example 1 only in that: the stirring speed in the step (2) is 1200 rpm/min.
Comparative example 7
As a comparative example of an acid dye dyeing assistant according to the invention, this comparative example differs from example 1 only in that: the stirring speed in the step (3) is 900 rpm/min.
Experimental example 1
The acid dye dyeing assistants prepared in examples 1 to 5 and comparative examples 1 to 7 were used for dyeing of fabrics according to the conventional dyeing method, and the fabrics were tested for dye uptake, color difference, level dyeing property and color fastness, and the test results are shown in table 1.
TABLE 1
| Dye uptake | Color difference | Level dyeing stage | Wet rubbing fastness to washing | Fastness to dry rubbing | |
| Example 1 | 98.21 | 2.9 | 2-3 | 5 | 5 |
| Example 2 | 96.11 | 2.8 | 2-3 | 4-5 | 4-5 |
| Example 3 | 96.19 | 2.9 | 2-3 | 4-5 | 4-5 |
| Example 4 | 97.77 | 3.0 | 2-3 | 5 | 4-5 |
| Example 5 | 97.62 | 3.0 | 2-3 | 4-5 | 4-5 |
| Comparative example 1 | 82.71 | 4.5 | 1 | 3 | 3-4 |
| Comparative example 2 | 82.03 | 4.6 | 1 | 3 | 4 |
| Comparative example 3 | 81.47 | 4.4 | 2 | 3-4 | 4 |
| Comparative example 4 | 82.84 | 4.2 | 2 | 3-4 | 4 |
| Comparative example 5 | 81.65 | 4.1 | 2 | 3-4 | 3-4 |
| Comparative example 6 | 92.37 | 3.5 | 2 | 3-4 | 4 |
| Comparative example 7 | 93.31 | 3.3 | 2 | 3-4 | 4 |
As can be seen from Table 1, the acid dye dyeing auxiliary of the invention can significantly improve the dye uptake and the dye fastness of the dye and improve the dyeing quality.
Finally, it should be noted that the above embodiments are intended to illustrate the technical solutions of the present invention and not to limit the scope of the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (8)
1. The acid dye dyeing auxiliary is characterized by comprising the following components in parts by weight: 10-30 parts of rhamnolipid, 10-30 parts of fatty alcohol-polyoxyethylene ether, 2-8 parts of triethanolamine, 2-8 parts of acetic acid and 10-30 parts of caprolactam.
2. The acid dye dyeing assistant according to claim 1, characterized by comprising the following components in parts by weight: 15-25 parts of rhamnolipid, 15-25 parts of fatty alcohol-polyoxyethylene ether, 4-6 parts of triethanolamine, 4-6 parts of acetic acid and 15-35 parts of caprolactam.
3. The acid dye dyeing assistant according to claim 2, characterized by comprising the following components in parts by weight: 20 parts of rhamnolipid, 20 parts of fatty alcohol-polyoxyethylene ether, 5 parts of triethanolamine, 5 parts of acetic acid and 20 parts of caprolactam.
4. A method for preparing an acid dye dyeing assistant according to any one of claims 1 to 3, comprising the steps of:
(1) adding triethanolamine and acetic acid into a solvent, stirring uniformly, adding fatty alcohol-polyoxyethylene ether, stirring until the fatty alcohol-polyoxyethylene ether is completely dissolved, and defoaming to obtain a mixed solution 1;
(2) adding caprolactam into the solvent, stirring uniformly, adding rhamnolipid, stirring uniformly until the rhamnolipid is completely dissolved, and defoaming to obtain a mixed solution 2;
(3) and (3) adding the mixed solution 1 obtained in the step (1) into the mixed solution 2 obtained in the step (2) under a stirring state, and uniformly stirring to obtain the acid dye dyeing auxiliary agent.
5. The method as set forth in claim 4, wherein the stirring speed in step (1) is 1200-1500 rpm/min.
6. The method as set forth in claim 4, wherein the stirring speed in step (2) is 900-1200 rpm/min.
7. The method as set forth in claim 4, wherein the stirring speed in the step (2) is 500-800 rpm/min.
8. The method of claim 4, wherein the solvent is water.
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