Disperse yellow-brown dye composition and application thereof
Through the synergistic effect of the disperse yellow-brown dye composition, the problems of color uniformity and fastness in the dyeing process of acetate fiber and polyester blended fabrics were solved, achieving efficient and uniform dyeing effect at low temperature, meeting the requirements of high-end textiles.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- SHANGHAI ARGUS NEW MATERIAL CO LTD
- Filing Date
- 2026-01-07
- Publication Date
- 2026-04-21
AI Technical Summary
Acetate fiber and polyester blended fabrics have problems with poor color uniformity and fastness during the dyeing process, especially color difference and fabric damage during temperature difference and alkaline reduction washing.
A disperse yellow-brown dye composition is used, comprising component A and component B. Component A is a dye compound with a specific structure, and component B is a dye compound containing cyano and methoxycarbonylmethyl groups. Through synergistic action, it achieves uniformity in dyeing rate and color depth on acetate and polyester fibers, and enhances the binding strength between the dye and the fiber through multiple polar groups. It is suitable for low-temperature dyeing.
It achieves good color matching and high fastness performance of acetate and polyester fibers at low temperatures, avoiding high temperature damage and color fading problems caused by alkaline washing, thus meeting the requirements of high-end textiles.
Smart Images
Figure CN121895779A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of textile printing and dyeing technology, and more specifically, to a disperse yellow-brown dye composition and its application. Background Technology
[0002] Currently, the raw materials commonly used in textile fabrics on the market are mostly cotton, polyester, nylon, and regenerated cellulose fibers. While these fabrics can basically meet people's needs, they also have some shortcomings. For example, polyester fabrics have good heat resistance, tensile strength, and washability, but their moisture absorption is poor and they suffer from severe static electricity. Acetate fabrics have a certain degree of moisture absorption, a soft hand feel, a gentle luster, and are comfortable to wear, but their chemical stability and tensile strength are relatively poor. Cellulose diacetate fiber, with its soft luster, excellent antistatic properties, good moisture absorption and quick-drying characteristics, and flowing fabric, is widely used in the development of high-end fabrics and is highly favored by consumers. However, cellulose diacetate fiber has low strength, is not resistant to high temperatures, alkalis (including weak alkalis), and oxidants, making it difficult to print and dye, resulting in limited coloring options and issues such as creases and fingerprints on the fabric.
[0003] With the development of domestic technology and the increasing social demand, blended fabrics of acetate fiber with cotton, viscose, polyester, and other fibers have begun to appear in China, mostly used in high-end apparel. Among them, acetate-polyester blended fabrics retain the fabric's luster and smooth, soft feel, while also exhibiting good dimensional stability and enhanced fabric strength. They combine aesthetics with comfort and practicality, better meeting market demands. Acetate fiber is a derivative of cellulose. Most of the hydroxyl groups in its molecule are acetylated, which reduces its hydrophilicity and reduces its polar groups, resulting in low swelling in water. Therefore, disperse dyes are required for dyeing. However, the suitable dyeing temperature for acetate fiber is 70-90℃. Excessive temperature will cause fabric shrinkage, affecting the hand feel. For polyester fiber, high-temperature and high-pressure dyeing is mostly used, requiring a temperature of 100-140℃. This temperature difference poses a significant challenge to the one-bath dyeing of acetate fiber and polyester blended fabrics. Excessive temperature will damage acetate fiber, while insufficient temperature will result in low dye uptake and poor fastness in polyester. Generally, the temperature should not exceed 115℃, which makes it very difficult to improve the dyeing depth and fastness, and it easily forms wrinkles. Furthermore, wrinkles formed in the pre-formed fabric are difficult to remove before pre-setting.
[0004] In addition, the conventional alkaline reduction washing after dyeing will cause deacetylation of acetate fibers, which will not only cause the disperse dyes to fall off, resulting in a large number of white spots on the fabric surface, producing defects and uneven dyeing, but also reduce the tensile strength of the fabric. At the same time, traditional cellulose acetate fiber fabric dyeing mostly uses small molecule low-energy disperse dyes, which have a high dyeing rate, but poor fastness to washing and perspiration. Moreover, the dyeing rate and dyeing rate of disperse dyes on acetate fibers and polyester fibers are different, which makes blended fabrics prone to two-phase color difference, with acetate fibers getting a darker color and polyester fibers getting a lighter color, making it difficult to achieve ideal color matching.
[0005] These factors have led to difficulties in the dyeing, finishing, and application of acetate / polyester fabrics. Therefore, there is an urgent need to propose a solution to address the problems of uneven dyeing, poor color uniformity, and poor colorfastness. Summary of the Invention
[0006] In order to achieve good color uniformity and high fastness of color on acetate and polyester fibers during the dyeing of acetate-polyester blended fabrics, this application provides a disperse yellow-brown dye composition and its application.
[0007] In a first aspect, this application provides a disperse yellow-brown dye composition, which adopts the following technical solution: A disperse yellow-brown dye composition comprising component A and component B, wherein component A is selected from dye compounds represented by formula (I); and component B comprises one or more dye compounds represented by general formula (II): Formula (I); General formula (II); In general formula (II): R1 is -CN; R2 is -NR3R4; R3 is -CH2C00CH3; R4 is -CH2C00CH3.
[0008] By adopting the above technical solution, the combination of components A and B achieves synergistic regulation of the dyeing behavior of the two fibers. The cyano (-CN) and methoxycarbonylmethyl (-CH2C00CH3) in component B can enhance the affinity between dye molecules and fibers. At the same time, through the difference in molecular structure, the dyeing rate and equilibrium dyeing amount of the two components on acetate fibers and polyester fibers tend to be consistent. Thus, in one-bath dyeing, the two fibers can achieve similar color depth and hue at the same temperature, thereby obtaining good color homonym. Meanwhile, both components A and B contain multiple polar groups in their molecular structures, such as azo, nitro, cyano, and ester groups. These groups can form hydrogen bonds and van der Waals forces with carbonyl and ester groups on the molecular chains of acetate and polyester fibers, enhancing the binding strength between the dye and the fiber. Furthermore, the methoxycarbonyl methyl group (-CH2COOCH3) in component B can form a strong dipole-dipole interaction with the fiber, while the cyano group (-CN) has less steric hindrance, which facilitates the diffusion and penetration of dye molecules within the fiber, allowing the dye to fully penetrate the fiber interior, reducing surface floating color, and thus improving the dye's fastness. Moreover, the synergistic effect of components A and B achieves a high dye exhaustion rate during the dyeing process, reducing surface floating color, and achieving good dyeing results at relatively low temperatures of ≤115℃. Under alkaline conditions, the dye molecular structures of components A and B are stable and less prone to hydrolysis and shedding, which helps ensure the uniformity of the dyeing result. Therefore, the above-mentioned disperse yellow-brown dye composition can achieve good color uniformity on both acetate and polyester fibers when dyeing acetate and polyester blended fabrics, and also has high fastness performance, resulting in a better overall application effect.
[0009] Preferably, in general formula (II), -CN is located at the meta or ortho position of the -N=N- group on the benzene nucleus.
[0010] By adopting the above technical solution, the cyano group, as a strong electron-withdrawing group, can not only significantly enhance the dark color effect of the dye after being introduced at the ortho or meta position of the azo group, but also improve the brightness and purity of the dye, making the color more saturated. At the same time, it can also form hydrogen bonds and van der Waals forces with the ester group on the polyester macromolecule, enhance the binding strength between the dye and the fiber, improve the diffusion ability of the dye inside the fiber, which is conducive to improving the dyeing rate and has a positive impact on the various fastness properties of the dye, ensuring efficient and high-quality dyeing of acetate / polyester blended fabrics.
[0011] Preferably, in general formula (II), -NR3R4 is located at the meta or para position of the -N=N- group on the benzene nucleus.
[0012] By adopting the above technical solution, the dark color effect is most significant when -NR3R4 is located at the meta or para position of the -N=N- group on the benzene ring. This is because the para substituent can participate in the conjugated system to the maximum extent, enhance the dipole of the molecule, shift the maximum absorption wavelength of the dye to the long wavelength direction, deepen the color, and enhance the affinity between the dye molecule and the fiber, improve the dye lifting power and dyeing rate, and significantly improve the various fastness properties of the dye. As a result, the dye can achieve good color uniformity at a lower temperature while maintaining high fastness performance in the dyeing of acetate / polyester blended fabrics.
[0013] Preferably, in general formula (II), -CN is located at the ortho position of the -N=N- group on the benzene nucleus, and -NR3R4 is located at the para position of the -N=N- group on the benzene nucleus.
[0014] By adopting the above technical solution, this special substituent position configuration, through multiple synergistic effects, enables disperse dyes to exhibit excellent color uniformity, high dyeing rate and comprehensive fastness performance in the dyeing of acetate / polyester blended fabrics. It can achieve good dyeing effect at a relatively low temperature of ≤115℃, avoiding the damage to acetate fibers caused by traditional alkaline reduction washing. At the same time, all color fastness indicators reach level 4 or above, meeting the requirements of high-end textiles.
[0015] Preferably, the weight ratio of component A to component B is 1:(0.5-2).
[0016] By adopting the above technical solution, the synergistic effect of components A and B in the above amounts is relatively stable. In the dyeing of acetate-polyester blended fabrics, it can make the colors on the acetate fibers and polyester fibers have better color matching and also have high fastness performance.
[0017] Preferably, the dye compound represented by general formula (II) is a compound of formula (II-1), (II-2), (II-3), (II-4), (II-5), or (II-6): Equation (II-1); Equation (II-2); Equation (II-3); Equation (II-4); Equation (II-5); Equation (II-6).
[0018] By adopting the above technical solutions, selecting one or more of the compounds of formula (II-1), formula (II-2), formula (II-3), formula (II-4), formula (II-5) and formula (II-6) as component B, it is possible to ensure that the synergistic effect between component A and component B is relatively excellent and stable.
[0019] Secondly, this application provides a disperse yellow-brown dye composition for dyeing acetate-polyester blended fabrics, acetate fibers, and polyester fibers.
[0020] Preferably, in the dyeing application of the disperse yellow-brown dye composition on acetate-polyester blended fabrics, acetate fibers and polyester fibers, a leveling agent BAP is used in the dyeing application process, and the amount of leveling agent BAP is 1.5 g / L.
[0021] By adopting the above technical solution, the leveling agent BAP can improve the migration properties of dyes, achieving a balanced dyeing process. Its dosage is 1.5 g / L, higher than the 0.5 g / L dosage for conventional disperse dye dyeing. With the increase in the dosage of the leveling repair agent, the dyeing depth of acetate fibers gradually decreases, while the dyeing depth of polyester fibers gradually increases. In the initial dyeing stage, the low-temperature leveling repair agent reduces the interaction forces between polyester fibers, expanding the gaps between fibers and facilitating dye absorption. Simultaneously, it binds with acetate fibers, reducing the dye absorption space and achieving a retarding effect, thus lowering the dye uptake rate of acetate fibers. Furthermore, the low-temperature leveling repair agent can increase the dyeing rate of disperse dyes on polyester fibers and lower the dyeing temperature of disperse dyes on polyester fiber fabrics, thereby reducing high-temperature damage to acetate fibers and maximizing the preservation of their unique and excellent properties.
[0022] In summary, this application has the following beneficial effects: This application uses a dye compound as shown in formula (I) as component A and one or more compounds containing general formula (II) as component B. Disperse yellow and red dyes with different structures, containing azo and heterocyclic structures, are synergistically compounded using components A and B. The resulting disperse yellow-brown dye composition, when used to dye acetate and polyester blended fabrics, can achieve good color uniformity on acetate fibers and polyester fibers, and also has high fastness performance, resulting in better overall application effect. Attached Figure Description
[0023] Figure 1 This is a dyeing process diagram used in the dyeing performance test of this application. Detailed Implementation
[0024] The present application will be further described in detail below with reference to the embodiments. In addition, the raw materials used in the embodiments and comparative examples of the present application are all commercially available. Example Example 1
[0025] A disperse yellow-brown dye composition comprising component A and component B, wherein component A is selected from dye compounds represented by formula (I); component B comprises a dye compound represented by general formula (II); and the weight ratio of component A to component B is 1:1.25.
[0026] The dye compound represented by general formula (II) is of formula (II-1): Equation (II-1). Example 2
[0027] A disperse yellow-brown dye composition, which differs from Example 1 in that the weight ratio of component A to component B is 1:0.5. Example 3
[0028] A disperse yellow-brown dye composition, which differs from Example 1 in that the weight ratio of component A to component B is 1:2. Example 4
[0029] A disperse yellow-brown dye composition, differing from Example 1 in that the dye compound represented by general formula (II) is of formula (II-2): Equation (II-2). Example 5
[0030] A disperse yellow-brown dye composition, differing from Example 1 in that the dye compound represented by general formula (II) is of formula (II-3): Equation (II-3). Example 6
[0031] A disperse yellow-brown dye composition, differing from Example 1 in that the dye compound represented by general formula (II) is of formula (II-4): Equation (II-4). Example 7
[0032] A disperse yellow-brown dye composition, differing from Example 1 in that the dye compound represented by general formula (II) is of formula (II-5): Equation (II-5). Example 8
[0033] A disperse yellow-brown dye composition, differing from Example 1 in that the dye compound represented by general formula (II) is of formula (II-6): Equation (II-6). Comparative Example
[0034] Comparative Example 1 A disperse yellow-brown dye composition, which differs from Example 1 in that component B is replaced with CI Disperse Red 376.
[0035] Comparative Example 2 A disperse yellow-brown dye composition, which differs from Example 1 in that component B is replaced with Disperse Red 311 (CAS No. 77907-28-9). Performance testing
[0036] Test samples: The disperse yellow-brown dye compositions obtained in Examples 1-8 were used as test samples 1-8, and the red disperse dye compositions obtained in Comparative Examples 1-2 were used as control samples 1-2.
[0037] Test method: In the application of the disperse yellow-brown dye composition, the leveling agent BAP was used, and the amount of leveling agent BAP was 1.5 g / L; according to... Figure 1 The dyeing process is carried out ( Figure 1 In the formula A, it indicates: Disperse dye: 5% o.w.f., pH adjusted to 5.0 with HAC+NaAC, and Argalevel BAP (Shanghai Yayun Textile Chemical Co., Ltd.) 1.5g / L for dyeing. After dyeing, follow the instructions... Figure 1 The fabric was subjected to an alkaline washing process using sodium hydrosulfite (2 g / L) and caustic soda (0.5 g / L). Finally, the dyed fabric was tested and recorded using a Datacolor colorimeter under constant temperature and humidity conditions to determine its apparent depth (K / S) value. Test sample 1 was selected as the disperse dye. Acetate fiber, acetate fiber and polyester fiber were mixed and dyed in the same bath. The proportion of acetate fiber was 75 / 25. The color similarity (K / S value) was compared and the test results are shown in Table 1.
[0038] Table 1 fiber Staining depth (K / S value) Acetate fiber 33.75 Acetate fiber 38.69 polyester fiber 20.25 As shown in Table 1, the disperse yellow-brown dye composition of Example 1 exhibits excellent color uniformity in polyester-vinyl acetate fibers after application.
[0039] Test sample 1 was selected as the disperse dye. Acetate fiber and polyester fiber were mixed 1:1 and dyed in the same bath. During the process, the amount of leveling agent BAP was adjusted and the color uniformity K / S value was compared. The test results are shown in Table 2.
[0040] Table 2 Leveling agent dosage (g / L) 0.5g / L 1g / L 1.5g / L 2g / L Acetate fiber (K / S) 56.23 45 38.69 33.22 Polyester (K / S) 12.66 15.68 20.25 23.15 Same color Light-colored polyester Light-colored polyester better Dark polyester As shown in Table 2, the amount of leveling agent BAP used is 1.5 g / L, which is higher than the amount of BAP used in conventional disperse dyeing (0.5 g / L). This can improve the migration properties of the dye and achieve a balanced dyeing process.
[0041] Color fastness to washing was tested using test samples 1-8 and control samples 1-2 respectively, according to (ISO105C06-2010E C2S) 60℃ standard soap powder ECE(B). The test results are shown in Table 3.
[0042] Table 3. Color fastness to washing for test samples 1-8 and control sample 1-2 sample Color change Acetate ACE Cotton CO Nylon PA Polyester PET Acrylic PAN Wool Test sample 1 5 4-5 5 4 5 5 5 Test sample 2 4-5 4 4-5 3-4 4-5 4-5 4-5 Test sample 3 4-5 4 4-5 3-4 4-5 4-5 4-5 Test sample 4 4-5 4 4-5 3-4 4-5 4-5 4-5 Test sample 5 4-5 4 4-5 3-4 4-5 4-5 4-5 Test sample 6 4-5 4 4-5 3-4 4-5 4-5 4-5 Test sample 7 4-5 4 4-5 3-4 4-5 4-5 4-5 Test sample 8 4-5 4 4-5 3-4 4-5 4-5 4-5 Control sample 1 4 3-4 3-4 2-3 4 4 4 Control sample 2 4 3 3-4 2-3 4 4 3-4 Ordinary 4RL / 3 3-4 2 3-4 3-4 3-4 As can be seen from Examples 1-8 and Comparative Examples 1-2 and Tables 1-3, this application uses a dye compound as shown in Formula (I) as component A and one or more compounds containing general formula (II) as component B. By synergistically compounding components A and B, the resulting disperse yellow-brown dye composition can achieve good color uniformity on acetate fibers and polyester fibers when dyeing acetate-polyester blended fabrics, and also has high fastness performance, resulting in better overall application effect.
[0043] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of this application.
Claims
1. A disperse yellow-brown dye composition, characterized in that, The components include component A and component B, wherein component A is selected from dye compounds represented by formula (I); and component B comprises one or more dye compounds represented by general formula (II). Equation (I); General formula (II); In general formula (II): R1 is -CN; R2 is -NR3R4; R3 is -CH2C00CH3; R4 is -CH2C00CH3.
2. The disperse yellow-brown dye composition according to claim 1, characterized in that: In general formula (II), -CN is located at the meta or ortho position of the -N=N- group on the benzene ring.
3. The disperse yellow-brown dye composition according to claim 1, characterized in that: In general formula (II), -NR3R4 is located at the meta or para position of the -N=N- group on the benzene nucleus.
4. The disperse yellow-brown dye composition according to claim 1, characterized in that: In general formula (II), -CN is located at the ortho position of the -N=N- group on the benzene nucleus, and -NR3R4 is located at the para position of the -N=N- group on the benzene nucleus.
5. The disperse yellow-brown dye composition according to claim 1, characterized in that: The weight ratio of component A to component B is 1:(0.5-2).
6. The disperse yellow-brown dye composition according to claim 1, characterized in that: The dye compound represented by general formula (II) is a compound of formula (II-1), (II-2), (II-3), (II-4), (II-5), or (II-6): Equation (II-1); Equation (II-2); Equation (II-3); Equation (II-4); Equation (II-5); Equation (II-6).
7. The application of the disperse yellow-brown dye composition according to any one of claims 1-6 in the dyeing of acetate-polyester blended fabrics, acetate fibers and polyester fibers.
8. The application of the disperse yellow-brown dye composition according to claim 7 in dyeing acetate-polyester blended fabrics, acetate fibers, and polyester fibers, characterized in that: In the dyeing process, the leveling and transfer agent BAP is used, and the amount of leveling and transfer agent BAP is 1.5 g / L.