Liquid dye for use in a blended fabric and method of manufacture

Abstract

The application provides a liquid dye for blended fabric and a preparation method, the liquid dye comprises the following components in mass fraction: component A 53-60 parts, component B 7-13 parts, component C 40-45 parts, a dispersing agent 20-90 parts, 2-amino-4-acetylamino anisole 2-4 parts, an anionic etherifying agent 1-3 parts, an auxiliary A 8-15 parts, an auxiliary B 10-25 parts and water 100-400 parts, wherein the structure of component A is shown in formula (I), the structure of component B is shown in formula (II) and the structure of component C is shown in formula (III); the liquid dye is prepared by using efficient grinding and auxiliary compounding technology, the product has good fluidity and strong anti-settling stability, and will not produce condensation and nodules within one year; the traditional dust pollution of the dye is solved, the product is convenient to use, and the working environment is greatly improved; the dyeing performance is excellent, and various color fastnesses of printing and dyeing are good.

Description

Technical Field

[0001] This invention belongs to the field of textile technology, specifically relating to a liquid dye for blended fabrics and its preparation method. Background Technology

[0002] Blended fabrics are textiles made from a blend of two or more different types of fibers, such as cotton and polyester, or wool and nylon. Because the fibers in blended fabrics may have different chemical properties, special care is needed during dyeing to ensure that all fibers are dyed evenly and to maintain good colorfastness. With the increasing advocacy for energy conservation, emission reduction, and environmental protection, the high-pollution, high-energy-consuming dyeing and printing industry must improve its technology, save costs, and reduce pollution if it wants to continue to survive and develop.

[0003] Black disperse dyes are among the most widely used dark-colored disperse dyes. Currently, conventional black disperse dyes on the market, such as Disperse Black ECO, fail to meet the lightfastness requirements of some major brands for blended fabrics. While high-lightfastness blacks from abroad, such as Huntsman's BlackHL, can achieve lightfastness of grade 7 or higher, their dye strength is very low, resulting in higher dyeing costs and making them unsuitable for dyeing blended fabrics. Patent CN201510121488.8 relates to a black disperse dye composition, the black disperse dye itself, and its uses. This composition offers good coverage, lightfastness of grade 5 or higher, and excellent other colorfastness properties, making it particularly suitable for dyeing polyester microfiber. However, this composition also does not perform well in dyeing blended fabrics.

[0004] Therefore, there is an urgent need for a liquid dye for blended fabrics and a preparation method therein. Summary of the Invention

[0005] The purpose of this invention is to provide a liquid dye for blended fabrics and a method for its preparation.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A liquid dye for blended fabrics comprises the following components in parts by weight: component A 53-60 parts as shown in formula (I), component B 7-13 parts as shown in formula (II), component C 40-45 parts as shown in formula (III), dispersant 20-90 parts, 2-amino-4-acetaminophen ether 2-4 parts, anionic etherifying agent 1-3 parts, auxiliary agent A 8-15 parts, auxiliary agent B 10-25 parts, and water 100-400 parts;

[0008] The preparation method of additive A is as follows:

[0009] Step S1: Mix 1 part by mass of methacrylic acid, 1.2-1.5 parts by mass of 2-hydroxyethyl acrylate and 7-9 parts by mass of water, heat to 57-62℃ and stir for 10-20 min to obtain mixture a;

[0010] Step S2: Mix 0.03-0.06 parts by weight of ammonium sulfate and 0.1 parts by weight of water, heat to 27-32℃, and stir for 10-20 minutes to obtain mixture b;

[0011] Step S3: Mix 1 part by mass of water, 0.2-0.3 parts by mass of ethanol, 0.03-0.05 parts by mass of sodium bisulfite and 0.8-0.9 parts by mass of styrene, and heat to 78-82℃ to obtain mixture c;

[0012] Step S4: Add mixture a and mixture b to mixture c in sequence, react at 78-82℃ for 4-6 hours. After the reaction is complete, adjust the pH to 7.0, filter and wash with water, take the filter cake and dry to obtain auxiliary agent A;

[0013]

[0014] The black disperse dye composed of component A (as shown in formula (I), component B (as shown in formula (II), and component C (as shown in formula (III)) does not exhibit ideal light fastness to blended fabrics. This invention improves the light fastness of the aforementioned black disperse dye to blended fabrics by adding auxiliary agent A. The copolymer in auxiliary agent A provides an additional conjugated system, which helps absorb ultraviolet light; the copolymer can form hydrogen bonds with the blended fabric, enhancing adhesion and making the dye less prone to fading, thereby improving color fastness. Simultaneously, wash fastness is also improved under these conditions. However, the rubbing fastness of the liquid dye with auxiliary agent A added is not ideal.

[0015] Furthermore, the dispersant is selected from one or more of dispersant NNO, dispersant MF, and sodium lignosulfonate.

[0016] To further improve the sublimation fastness of liquid dyes, the dispersant is a mixture of dispersant NNO, dispersant MF and sodium lignosulfonate in a mass ratio of 1:1.3-1.6:0.5-0.8.

[0017] Furthermore, additive B is selected from one or more of sodium secondary alkyl diester sulfonate, isomeric tridecyl alcohol polyoxyethylene ether, and isomeric decayl alcohol ether phosphate.

[0018] Furthermore, additive B is a mixture of sodium secondary alkyl diester sulfonate, a surfactant containing a polyether chain, and isomeric decayl alcohol ether phosphate in a mass ratio of 1.4-1.7:0.2-0.5:1.

[0019] Furthermore, the preparation method of the surfactant containing polyether chains is as follows:

[0020] (1) Mix 100 parts by mass of palmitic acid and 88-90 parts by mass of thionyl chloride, react at 57-60℃ for 6-10h, cool down to 25-30℃, add 90-95 parts by mass of bromine, react at 45-47℃ for 9-10h, stand at 2-4℃ for 3-5h in a nitrogen atmosphere, wash with water 2-4 times, extract with hexane 2-3 times to obtain product 1;

[0021] (2) 10 parts by weight of product 1, 2-3 parts by weight of 1,6-hexanediol and 4-5 parts by weight of sodium carbonate were added to 30-35 parts by weight of dimethylformamide and reacted at 52-55℃ for 12-15h. Acetone was added to precipitate the product, and the organic layer was subjected to reduced pressure at 152-155℃ for 1-2h to obtain product 2.

[0022] (3) At 0℃, 5 parts by mass of product 2 were dissolved in 12-15 parts by mass of tetrahydrofuran, 1.2-1.5 parts by mass of lithium aluminum hydride were added, and the mixture was reacted at 25-28℃ for 2-3 hours. Then, 5-7 parts by mass of ethanol were added, and the mixture was extracted with diethyl ether 2-4 times to obtain product 3.

[0023] (4) Add 500 parts by weight of product 3 and 0.8-1.3 parts by weight of potassium hydroxide to a high pressure vessel, heat to 142-145℃, add 90-95 parts by weight of propylene oxide, maintain the temperature for 40-50 minutes, cool, adjust the pH value to 7, and obtain a surfactant containing polyether chains.

[0024] Furthermore, the pH was adjusted to 7 using acetic acid.

[0025] This invention improves the rubbing fastness of liquid dyes by adding auxiliary agent B. Auxiliary agent B improves the compatibility between the dye component and the fiber, promotes the uniform distribution of the dye component on the fiber surface, enhances the penetration and distribution uniformity of the dye component in the fabric fiber, and strengthens the bonding between the dye component and the fabric fiber. Simultaneously, the addition of auxiliary agent B also improves the storage stability of the liquid dye.

[0026] Furthermore, the anionic etherifying agent is one or more of ethylene oxide, propylene oxide, and epichlorohydrin.

[0027] Furthermore, the anionic etherifying agent is a mixture of ethylene oxide, propylene oxide, and epichlorohydrin in a mass ratio of 1.5-1.8:1:0.3-0.6.

[0028] The present invention also provides a method for preparing a liquid dye for blended fabrics, the method comprising the following steps: mixing the components and then grinding and dispersing them to obtain a liquid dye for blended fabrics.

[0029] 2-Amino-4-acetaminophen, CAS: 6375-47-9. Hubei Huiheyuan Chemical Co., Ltd.

[0030] The dye monomer compounds of formulas (I) to (III) used in this invention can be conveniently synthesized in a manner well known to those skilled in the art, such as the methods described in patents CN1563204, US3502645, parts by mass B1356695, CN1036974, or similar methods.

[0031] Compared with the prior art, the advantages and beneficial effects of the present invention are as follows:

[0032] 1. This invention utilizes efficient grinding and auxiliary agent compounding technology to prepare liquid dyes. The products exhibit good flowability, strong anti-settling stability, and will not agglomerate or form spots within one year. The dust pollution associated with traditional dyes is eliminated, and the products are convenient to use, significantly improving the working environment. Suitable for high-temperature and high-pressure dyeing, they offer excellent lightfastness and sublimation fastness, have minimal fiber contamination, and are suitable for dyeing blended fabrics.

[0033] 2. At the same dyeing concentration, the color of the dyeing residue from liquid dye is lighter than that from powdered dye. The COD of the dyeing residue from liquid disperse dye is significantly lower. In high-concentration dyeing, the COD of the dyeing residue from liquid disperse dye is more than 60% lower than that from powdered disperse dye, which greatly reduces the dyeing wastewater treatment cost for printing and dyeing enterprises.

[0034] 3. This invention improves the light fastness of the aforementioned black disperse dye to blended fabrics by adding auxiliary agent A. Simultaneously, the wash fastness is also improved under these conditions.

[0035] 4. This invention improves the rubbing fastness of liquid dyes by adding auxiliary agent B. Simultaneously, the addition of auxiliary agent B also improves the storage stability of the liquid dye. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of staining residues at different staining concentrations. Detailed Implementation

[0037] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] Example 1

[0039] This embodiment provides a liquid dye for blended fabrics, comprising the following components in parts by weight: 55 parts of component A as shown in formula (I), 9 parts of component B as shown in formula (II), 43 parts of component C as shown in formula (III), 80 parts of dispersant, 3 parts of 2-amino-4-acetaminophen, 2 parts of anionic etherifying agent, 14 parts of auxiliary agent A, 22 parts of auxiliary agent B, and 280 parts of water;

[0040]

[0041] The preparation method of additive A is as follows:

[0042] Step S1: Mix 1 part by mass of methacrylic acid, 1.4 parts by mass of 2-hydroxyethyl acrylate and 8 parts by mass of water, heat to 60°C and stir for 15 minutes to obtain mixture a;

[0043] Step S2: Mix 0.05 parts by mass of ammonium sulfate and 0.1 parts by mass of water, heat to 29°C, and stir for 15 minutes to obtain mixture b;

[0044] Step S3: Mix 1 part by mass of water, 0.24 parts by mass of ethanol, 0.04 parts by mass of sodium bisulfite and 0.86 parts by mass of styrene, heat to 80°C, and obtain mixture c;

[0045] Step S4: Add mixture a and mixture b to mixture c in sequence, react at 80°C for 5 hours. After the reaction is complete, adjust the pH to 7.0, filter and wash with water, take the filter cake and dry to obtain auxiliary agent A.

[0046] The dispersant is a mixture of dispersant NNO, dispersant MF and sodium lignosulfonate in a mass ratio of 1:1.5:0.7.

[0047] Additive B is a mixture of sodium secondary alkyl diester sulfonate, a surfactant containing a polyether chain, and isomeric deca-ol ether phosphate in a mass ratio of 1.6:0.4:1.

[0048] The preparation method of surfactants containing polyether chains is as follows:

[0049] (1) Mix 100 parts by mass of palmitic acid and 89 parts by mass of thionyl chloride, react at 58°C for 8 hours, cool down to 27°C, add 92 parts by mass of bromine, react at 46°C for 9.5 hours, stand at 3°C ​​for 4 hours in a nitrogen atmosphere, wash with water 3 times, extract with hexane 3 times to obtain product 1.

[0050] (2) 10 parts by mass of product 1, 2.4 parts by mass of 1,6-hexanediol and 4.4 parts by mass of sodium carbonate were added to 32 parts by mass of dimethylformamide and reacted at 54°C for 14 h. Acetone was added to precipitate the product, and the organic layer was subjected to reduced pressure at 153°C for 1.5 h to obtain product 2.

[0051] (3) At 0°C, 5 parts by mass of product 2 were dissolved in 14 parts by mass of tetrahydrofuran, 1.4 parts by mass of lithium aluminum hydride were added, and the mixture was reacted at 26°C for 2.5 h. 6 parts by mass of ethanol were added, and the mixture was extracted three times with diethyl ether to obtain product 3.

[0052] (4) Add 500 parts by mass of product 3 and 1 part by mass of potassium hydroxide to a high pressure vessel, heat to 144°C, add 93 parts by mass of propylene oxide, maintain the temperature for 45 minutes, cool, and adjust the pH value to 7 to obtain a surfactant containing polyether chains.

[0053] Adjust the pH to 7 using acetic acid.

[0054] The anionic etherifying agent is a mixture of ethylene oxide, propylene oxide, and epichlorohydrin in a mass ratio of 1.6:1:0.5.

[0055] A method for preparing liquid dyes for blended fabrics, the method comprising the following steps: mixing the components and then grinding and dispersing them to obtain a liquid dye for blended fabrics.

[0056] Example 2

[0057] This embodiment provides a liquid dye for blended fabrics, comprising the following components in parts by weight: 53 parts of component A as shown in formula (I), 7 parts of component B as shown in formula (II), 40 parts of component C as shown in formula (III), 60 parts of dispersant, 2 parts of 2-amino-4-acetaminophen, 1 part of anionic etherifying agent, 13 parts of auxiliary agent A, 20 parts of auxiliary agent B, and 270 parts of water;

[0058]

[0059] The preparation method of additive A is as follows:

[0060] Step S1: Mix 1 part by mass of methacrylic acid, 1.2 parts by mass of 2-hydroxyethyl acrylate and 7 parts by mass of water, heat to 57°C and stir for 10 min to obtain mixture a;

[0061] Step S2: Mix 0.03 parts by mass of ammonium sulfate and 0.1 parts by mass of water, heat to 27°C, and stir for 10 minutes to obtain mixture b;

[0062] Step S3: Mix 1 part by mass of water, 0.2 parts by mass of ethanol, 0.03 parts by mass of sodium bisulfite and 0.8 parts by mass of styrene, heat to 78°C, and obtain mixture c;

[0063] Step S4: Add mixture a and mixture b to mixture c in sequence, react at 78°C for 4 hours. After the reaction is complete, adjust the pH to 7.0, filter and wash with water, take the filter cake and dry to obtain auxiliary agent A.

[0064] The dispersant is a mixture of dispersant NNO, dispersant MF and sodium lignosulfonate in a mass ratio of 1:1.3:0.5.

[0065] Additive B is a mixture of sodium secondary alkyl diester sulfonate, a surfactant containing a polyether chain, and isomeric deca-ol ether phosphate in a mass ratio of 1.4:0.2:1.

[0066] The preparation method of surfactants containing polyether chains is as follows:

[0067] (1) Mix 100 parts by mass of palmitic acid and 88 parts by mass of thionyl chloride, react at 57°C for 6 h, cool down to 25°C, add 90 parts by mass of bromine, react at 45°C for 9 h, stand at 2°C for 3 h in a nitrogen atmosphere, wash twice with water, extract twice with hexane to obtain product 1.

[0068] (2) 10 parts by mass of product 1, 2 parts by mass of 1,6-hexanediol and 4 parts by mass of sodium carbonate were added to 30 parts by mass of dimethylformamide and reacted at 52°C for 12 h. Acetone was added to precipitate the product, and the organic layer was subjected to reduced pressure at 152°C for 1 h to obtain product 2.

[0069] (3) At 0°C, 5 parts by mass of product 2 were dissolved in 12 parts by mass of tetrahydrofuran, 1.2 parts by mass of lithium aluminum hydride were added, and the mixture was reacted at 25°C for 2 hours. Then, 5 parts by mass of ethanol were added, and the mixture was extracted twice with diethyl ether to obtain product 3.

[0070] (4) Add 500 parts by mass of product 3 and 0.8 parts by mass of potassium hydroxide to a high-pressure reactor, heat to 142°C, add 90 parts by mass of propylene oxide, maintain the temperature for 40 min, cool, and adjust the pH value to 7 to obtain a surfactant containing polyether chains.

[0071] Adjust the pH to 7 using acetic acid.

[0072] The anionic etherifying agent is a mixture of ethylene oxide, propylene oxide, and epichlorohydrin in a mass ratio of 1.5:1:0.3.

[0073] A method for preparing liquid dyes for blended fabrics, the method comprising the following steps: mixing the components and then grinding and dispersing them to obtain a liquid dye for blended fabrics.

[0074] Example 3

[0075] This embodiment provides a liquid dye for blended fabrics, comprising the following components in parts by weight: 60 parts of component A as shown in formula (I), 13 parts of component B as shown in formula (II), 45 parts of component C as shown in formula (III), 90 parts of dispersant, 4 parts of 2-amino-4-acetaminophen, 3 parts of anionic etherifying agent, 15 parts of auxiliary agent A, 25 parts of auxiliary agent B, and 300 parts of water.

[0076]

[0077]

[0078] The preparation method of additive A is as follows:

[0079] Step S1: Mix 1 part by mass of methacrylic acid, 1.5 parts by mass of 2-hydroxyethyl acrylate and 9 parts by mass of water, heat to 62°C and stir for 20 min to obtain mixture a;

[0080] Step S2: Mix 0.06 parts by mass of ammonium sulfate and 0.1 parts by mass of water, heat to 32°C, and stir for 20 minutes to obtain mixture b;

[0081] Step S3: Mix 1 part by mass of water, 0.3 parts by mass of ethanol, 0.05 parts by mass of sodium bisulfite and 0.9 parts by mass of styrene, heat to 82°C, and obtain mixture c;

[0082] Step S4: Add mixture a and mixture b to mixture c in sequence, react at 82℃ for 6 hours. After the reaction is complete, adjust the pH to 7.0, filter and wash with water, take the filter cake and dry to obtain auxiliary agent A.

[0083] The dispersant is a mixture of dispersant NNO, dispersant MF and sodium lignosulfonate in a mass ratio of 1:1.6:0.8.

[0084] Additive B is a mixture of sodium secondary alkyl diester sulfonate, a surfactant containing a polyether chain, and isomeric deca-ol ether phosphate in a mass ratio of 1.7:0.5:1.

[0085] The preparation method of surfactants containing polyether chains is as follows:

[0086] (1) Mix 100 parts by mass of palmitic acid and 90 parts by mass of thionyl chloride, react at 60°C for 10 h, cool down to 30°C, add 95 parts by mass of bromine, react at 47°C for 10 h, stand at 4°C for 5 h in a nitrogen atmosphere, wash with water 4 times, extract with hexane 3 times to obtain product 1.

[0087] (2) 10 parts by mass of product 1, 3 parts by mass of 1,6-hexanediol and 5 parts by mass of sodium carbonate were added to 35 parts by mass of dimethylformamide and reacted at 55°C for 15 h. Acetone was added to precipitate the product, and the organic layer was subjected to reduced pressure at 155°C for 2 h to obtain product 2.

[0088] (3) At 0°C, 5 parts by mass of product 2 were dissolved in 15 parts by mass of tetrahydrofuran, 1.5 parts by mass of lithium aluminum hydride were added, and the mixture was reacted at 28°C for 3 hours. Then, 7 parts by mass of ethanol were added, and the mixture was extracted 4 times with diethyl ether to obtain product 3.

[0089] (4) Add 500 parts by mass of product 3 and 1.3 parts by mass of potassium hydroxide to a high-pressure reactor, heat to 145°C, add 95 parts by mass of propylene oxide, maintain the temperature for 50 minutes, cool, and adjust the pH value to 7 to obtain a surfactant containing polyether chains.

[0090] Adjust the pH to 7 using acetic acid.

[0091] The anionic etherifying agent is a mixture of ethylene oxide, propylene oxide, and epichlorohydrin in a mass ratio of 1.8:1:0.6.

[0092] A method for preparing liquid dyes for blended fabrics, the method comprising the following steps: mixing the components and then grinding and dispersing them to obtain a liquid dye for blended fabrics.

[0093] Comparative Example 1

[0094] The difference between this comparative example and Example 1 is that 14 parts of additive A and 22 parts of additive B are replaced with 22 parts of additive A and 14 parts of additive B.

[0095] Comparative Example 2

[0096] The difference between this comparative example and Example 1 is that 14 parts of additive A and 22 parts of additive B are replaced with 8 parts of additive A and 28 parts of additive B.

[0097] Comparative Example 3

[0098] The difference between this comparative example and Example 1 is that the dispersant is a mixture of dispersant NNO, dispersant MF and sodium lignosulfonate in a mass ratio of 1:1:1.

[0099] Comparative Example 4

[0100] The difference between this comparative example and Example 1 is that: Additive B is a mixture of sodium secondary alkyl diester sulfonate, surfactant containing polyether chain, and isomeric decayl alcohol ether phosphate in a mass ratio of 1:1:1.

[0101] Comparative Example 5

[0102] The difference between this comparative example and Example 1 is that the preparation method of the surfactant containing polyether chains is as follows:

[0103] (1) Mix 100 parts by mass of dodecanoic acid and 89 parts by mass of thionyl chloride, react at 58°C for 8 hours, cool down to 27°C, add 92 parts by mass of bromine, react at 46°C for 9.5 hours, stand at 3°C ​​for 4 hours in a nitrogen atmosphere, wash with water 3 times, extract with hexane 3 times to obtain product 1.

[0104] (2) 10 parts by mass of product 1, 2.4 parts by mass of 1,8-octanediol and 4.4 parts by mass of sodium carbonate were added to 32 parts by mass of dimethylformamide and reacted at 54°C for 14 h. Acetone was added to precipitate the product, and the organic layer was subjected to reduced pressure at 153°C for 1.5 h to obtain product 2.

[0105] (3) At 0°C, 5 parts by mass of product 2 were dissolved in 14 parts by mass of tetrahydrofuran, 1.4 parts by mass of lithium aluminum hydride were added, and the mixture was reacted at 26°C for 2.5 h. 6 parts by mass of ethanol were added, and the mixture was extracted three times with diethyl ether to obtain product 3.

[0106] (4) Add 500 parts by mass of product 3 and 1 part by mass of potassium hydroxide to a high pressure vessel, heat to 144°C, add 93 parts by mass of ethylene oxide, maintain the temperature for 45 min, cool, and adjust the pH value to 7 with acetic acid to obtain a surfactant containing polyether chains.

[0107] Comparative Example 6

[0108] The difference between this comparative example and Example 1 is that: Additive B is a mixture of sodium secondary alkyl diester sulfonate, sodium dodecylbenzene sulfonate, and isomeric decayl alcohol ether phosphate in a mass ratio of 1.7:0.5:1.

[0109] Performance testing

[0110] The blended fabrics were dyed using liquid dyes from Examples 1-3 and Comparative Examples 1-6, and their performance was tested, as detailed below:

[0111] Take 100g of untreated polyester-cotton blended fabric. In a high-temperature, high-pressure overflow dyeing machine, add dyeing water and circulate the untreated pure polyester fabric. Add appropriate amounts of sodium carbonate and sodium hydroxide to adjust the pH to 9. Add 3 parts by mass of refining agent HE0815, add liquid dye, and control the dyeing concentration to 2% (i.e., the amount of liquid dye added is 2% of the mass of dyeing water). Heat to 80℃ for 20 minutes, then to 130℃ for 50 minutes, hold for 60 minutes, cool to 80℃ to remove residual dyeing liquid, rinse with 80℃ hot water, then wash with cold water. Finally, remove the fabric and dry to obtain the dyed fabric sample. Perform the following tests:

[0112] Color fastness to light: Tested according to ISO 105BO2:2000;

[0113] Color fastness to washing: Tested in accordance with GB / T3921-1997.

[0114] Color fastness to rubbing: tested according to GB / T3920-2008.

[0115] Sublimation fastness: Tested according to GB / T5718-1997 (180℃, 30S).

[0116] Storage stability: Store the liquid dye at room temperature (25°C) away from light for one year and observe whether agglomeration or caking occurs. If no agglomeration or caking occurs, it is recorded as passed; otherwise, it is recorded as failed.

[0117] The test results are shown in Table 1.

[0118] Table 1 Performance Test Results

[0119]

[0120] Based on the above method, the COD data of dyeing residues at different dyeing concentrations (dyeing concentration = mass of liquid dye added / mass of dyeing water * 100%) were determined. The results are shown in Table 2, and the COD data of dyeing residues at different dyeing concentrations are shown in Table 2. Figure 1 .

[0121] Table 2. COD data (mg / L) of staining residue at different staining concentrations.

[0122] Serial Number Staining concentration (%) COD data (mg / L) 1 0.5 251 2 1 272 3 2 371 4 3 496 5 4 600 6 5 690

[0123] The performance test results above show that the staining effect of Examples 1-3 is good, especially the comprehensive performance of Example 1 is the most outstanding. This is mainly due to the synergistic effect of various components in the liquid fuel.

[0124] The comparative examples, lacking the necessary technical solutions, showed significantly inferior performance compared to the exemplary examples in relevant tests. In Comparative Examples 1-2, altering the amounts of auxiliaries A and B resulted in a decrease in dyeing effect, indicating a synergistic effect between the two components. Comparative Examples 4-6, without auxiliary B, showed a decline in rubbing fastness and poor storage stability. These experimental results further demonstrate the importance of the technical solutions defined in this invention for its technical effectiveness.

Claims

1. A liquid dye for blended fabrics, characterized in that, The product comprises the following components in parts by weight: 53-60 parts of component A as shown in formula (I), 7-13 parts of component B as shown in formula (II), 40-45 parts of component C as shown in formula (III), 20-90 parts of dispersant, 2-4 parts of 2-amino-4-acetaminophen, 1-3 parts of anionic etherifying agent, 8-15 parts of auxiliary agent A, 10-25 parts of auxiliary agent B, and 100-400 parts of water; The preparation method of additive A is as follows: Step S1: Mix 1 part by mass of methacrylic acid, 1.2-1.5 parts by mass of 2-hydroxyethyl acrylate and 7-9 parts by mass of water, heat to 57-62℃ and stir for 10-20 min to obtain mixture a; Step S2: Mix 0.03-0.06 parts by weight of ammonium sulfate and 0.1 parts by weight of water, heat to 27-32℃, and stir for 10-20 minutes to obtain mixture b; Step S3: Mix 1 part by mass of water, 0.2-0.3 parts by mass of ethanol, 0.03-0.05 parts by mass of sodium bisulfite and 0.8-0.9 parts by mass of styrene, and heat to 78-82℃ to obtain mixture c; Step S4: Add mixture a and mixture b to mixture c in sequence, react at 78-82℃ for 4-6 hours. After the reaction is complete, adjust the pH to 7.0, filter and wash with water, take the filter cake and dry to obtain auxiliary agent A; （Ⅰ）； （Ⅱ）； （Ⅲ）； Additive B is sodium secondary alkyl diester sulfonate, a surfactant containing a polyether chain, and isomeric deca-ol ether phosphate in a mass ratio of 1.4-1.7:0.2-0.5:1; the preparation method of the surfactant containing the polyether chain is as follows: (1) Mix 100 parts by mass of palmitic acid and 88-90 parts by mass of thionyl chloride, react at 57-60℃ for 6-10h, cool down to 25-30℃, add 90-95 parts by mass of bromine, react at 45-47℃ for 9-10h, stand at 2-4℃ in a nitrogen atmosphere for 3-5h, wash with water 2-4 times, extract with hexane 2-3 times to obtain product 1; (2) 10 parts by weight of product 1, 2-3 parts by weight of 1,6-hexanediol and 4-5 parts by weight of sodium carbonate were added to 30-35 parts by weight of dimethylformamide and reacted at 52-55℃ for 12-15 h. Acetone was added to precipitate the product, and the organic layer was subjected to reduced pressure at 152-155℃ for 1-2 h to obtain product 2. (3) At 0℃, 5 parts by mass of product 2 were dissolved in 12-15 parts by mass of tetrahydrofuran, 1.2-1.5 parts by mass of lithium aluminum hydride were added, and the mixture was reacted at 25-28℃ for 2-3 hours. Then, 5-7 parts by mass of ethanol were added, and the mixture was extracted with diethyl ether 2-4 times to obtain product 3. (4) Add 500 parts by weight of product 3 and 0.8-1.3 parts by weight of potassium hydroxide to a high pressure vessel, heat to 142-145℃, add 90-95 parts by weight of propylene oxide, maintain the temperature for 40-50 minutes, cool, adjust the pH value to 7, and obtain a surfactant containing polyether chains.

2. The liquid dye for blended fabrics according to claim 1, characterized in that, The dispersant is selected from one or more of dispersant NNO, dispersant MF, and sodium lignosulfonate.

3. The liquid dye for blended fabrics according to claim 2, characterized in that, The dispersant is a mixture of dispersant NNO, dispersant MF and sodium lignosulfonate in a mass ratio of 1:1.3-1.6:0.5-0.

8.

4. The liquid dye for blended fabrics according to claim 1, characterized in that, Adjust the pH to 7 using acetic acid.

5. The liquid dye for blended fabrics according to claim 1, characterized in that, The anionic etherifying agent is one or more of ethylene oxide, propylene oxide, and epichlorohydrin.

6. The liquid dye for blended fabrics according to claim 5, characterized in that, The anionic etherifying agent is a mixture of ethylene oxide, propylene oxide, and epichlorohydrin in a mass ratio of 1.5-1.8:1:0.3-0.

6.

7. A method for preparing a liquid dye for blended fabrics according to any one of claims 1-6, characterized in that, The preparation method includes the following steps: mixing the components, grinding and dispersing them to obtain a liquid dye for blended fabrics.

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