Yellow dye composition and application thereof

Abstract

The invention relates to the field of dyes, and particularly discloses a yellow dye composition and application thereof. The yellow dye composition is formed by compounding the compound A shown in the formula (I) and the compound B shown in the formula (II), the yellow dye composition formed by compounding the two compounds has no photochromic problem, and a dyed fiber material is prevented from fading under the illumination condition; the yellow dye composition has excellent lifting power, good stability and color fastness index, and can give consideration to good dyeing performance and economic performance; the yellow dye composition is suitable for dyeing processes such as dip dyeing and pad dyeing, and can meet the requirements of different fiber materials and diversified dyeing processes. The structures of the two compounds are respectively shown in the specification.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of dyes, more particularly, it relates to a yellow dye composition and application thereof. BACKGROUND

[0002] In the field of dyes, with the continuous development of the textile, leather and other industries, the demand for dyes is increasing. High-quality dyes can give various types of fiber materials rich and lasting color, thereby improving the aesthetic and market competitiveness of products. At the same time, with the improvement of people's environmental awareness and the improvement of the quality requirements of textiles, dyes not only need to have good dyeing effect, but also need to consider its stability, safety and economy and other factors.

[0003] Before the present technical solution, in order to meet the dyeing needs of different fiber materials, the industry usually uses single-structure dyes for dyeing. These dyes focus on color brightness, or focus on color fastness. For dip dyeing process, dyes with certain solubility and affinity are often used, and the dye molecules gradually penetrate into the fiber inside through long-term soaking to achieve the purpose of dyeing. For padding process, dyes with high reactivity are selected, and the pressure of the roller is used to make the dye evenly adhere to the surface of the fiber. In addition, there are also some methods of adding a large amount of additives to improve the performance of dyes to improve the dyeing effect.

[0004] However, these conventional means in the prior art have obvious defects. Single-structure dyes often cannot meet the requirements of dyeing performance and economic performance at the same time, and some dyes have photochromic phenomenon, which causes the dyed fiber materials to fade easily under light conditions. At the same time, the build-up, stability and color fastness indicators of existing dyes also need to be improved, and they cannot well adapt to the needs of different fiber materials and diversified dyeing processes. SUMMARY

[0005] In order to solve the above technical problems, the present application provides a yellow dye compound and its preparation method and application.

[0006] The present application adopts the following technical solution: In a first aspect, the present application provides a yellow dye compound, which comprises compound A and compound B; The structure of the compound A is shown as formula (I): The structure of the compound B is shown as formula (II):

[0007] Further, in the above yellow dye composition, the mass ratio of compound A to compound B is 20-80:80-20.

[0008] Preferably, in the yellow dye composition, the mass ratio of compound A and compound B is 30-60:40-70.

[0009] In a second aspect, the application provides an application of the yellow dye composition, i.e. the application of the dye composition in the coloring of acetate fiber, cotton fiber, cotton fiber, polyester fiber, polyacrylonitrile fiber, wool fiber and fiber blend.

[0010] Further, in the coloring process, the dyeing process is dip dyeing or padding.

[0011] In a third aspect, the application provides a dyeing method of the yellow dye composition, which comprises: The fabric to be dyed is immersed in a dye bath containing the yellow dye composition and electrolyte salt at 55-65℃, and after 25-35min of incubation, a dyeing aid is added, and the incubation is continued for 55-65min, followed by draining, washing and soaping.

[0012] Further, in the soaping process of the fabric, the solution temperature is increased to 95-100℃ and incubated for 10-20min, and then washed and dried.

[0013] Further, the temperature increase rate in the soaping process is 0.5-1.5℃ / min.

[0014] Further, the dyeing aid comprises one or more of pH adjuster, dispersant, leveling agent and fixing agent.

[0015] Further, the electrolyte salt is anhydrous sodium sulfate, and the concentration of anhydrous sodium sulfate in the dye bath is 20-40g / L; the fixing agent is soda ash, and the concentration of soda ash is 2-4g / L.

[0016] In summary, the application has the following beneficial effects: Since the application uses compound A as shown in formula (I) and compound B as shown in formula (II) to form a yellow dye composition, the synergistic effect reduces the photosensitivity and improves the color fastness. The yellow dye composition can be used for coloring various fibers such as cellulose fiber, polyamide fiber, protein fiber, polyester fiber and fiber blend, and can achieve good dyeing effect. The dye composition can also be added with a dyeing aid to further optimize the dyeing condition. The application has at least the following advantages: 1. The yellow dye composition formed by compound A and compound B has no photochromic problem, avoiding the discoloration of the dyed fiber material under light conditions; 2. The yellow dye composition has excellent build-up, good stability and color fastness, and can balance good dyeing performance and economic performance; 3. The yellow dye composition is suitable for dyeing processes such as dip dyeing, padding, etc., and can meet the requirements of different fiber materials and various dyeing processes. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a detection result chart of the chlorine-resistant water color fastness of the yellow dye composition provided in the present application; Figure 2 is a detection result chart of the water washing color fastness of the yellow dye composition provided in the present application; Figure 3 is a detection result chart of the alkali sweat stain fastness of the yellow dye composition provided in the present application; Figure 4 is a dyeing result chart of the yellow dye composition provided in the present application on Tencel wool; Figure 5 is a photosensitivity test curve chart of the yellow dye composition provided in the present application. DETAILED DESCRIPTION

[0018] The embodiments of the present application will be described in detail below with reference to the examples, but those skilled in the art will understand that the following examples are only for illustration of the present application and should not be regarded as limiting the scope of the present application. The specific conditions not mentioned in the examples are carried out according to the conventional conditions or the conditions recommended by the manufacturer. The reagents or instruments not mentioned by the manufacturer are all conventional products that can be purchased on the market.

[0019] The technical solution of the present application is: The present application provides a non-photosensitive yellow dye composition, which comprises compound A and compound B. The structure of compound A is shown in formula (I): The structure of compound B is shown in formula (II):

[0020] Compound A and compound B are synthesized by referring to the method disclosed in the patent; In the yellow dye composition provided in the present application, the mass ratio of compound A to compound B is 20-80:80-20; preferably, the mass ratio is 30-60:40-70.

[0021] The present embodiment further provides a dyeing method using the above-mentioned yellow dye composition, which specifically comprises: Step (1): immerse the fabric to be dyed in a dye bath containing the above-mentioned yellow dye composition and electrolyte salt at 55-65℃ for 25-35 min; Further, the fabric to be dyed comprises at least one of acetate fiber, cotton fiber, cotton fiber, polyester fiber, polyacrylonitrile fiber, wool fiber, and blended fiber.

[0022] Further, the electrolyte salt is anhydrous sodium sulfate, and the concentration of the anhydrous sodium sulfate in the dye bath is 20-40 g / L, preferably 25-35 g / L, for example, can be 28 g / L, 30 g / L, 32 g / L.

[0023] Preferably, the dye bath temperature is 57-63℃, and the holding time is 28-32 min.

[0024] Step (2): In the dye bath, a dyeing auxiliary is added, and the holding is continued for 55-65 min.

[0025] Further, the dyeing auxiliary comprises one or more of pH adjuster, dispersant, leveling agent, and fixing agent. The specific selection of each type of dyeing auxiliary can be selected according to the conventional selection in the art, and the amount of the dyeing auxiliary can also be selected as needed, without particular limitation, but generally not more than 15% of the total weight of the dye bath composition. Among them, the pH adjuster can be selected from sodium dihydrogen phosphate, disodium hydrogen phosphate, sodium borate, sodium acetate, sodium carbonate, and other acidic pH adjusters, and the amount of the pH adjuster used is generally 0-5% of the total weight of the dye bath composition, more preferably 0.5-2%; the dispersant and the leveling agent are also conventional choices in the dyeing process and dye preparation.

[0026] Further, the fixing agent is soda ash, and the concentration of the soda ash in the dye bath is 2-4 g / L, preferably 2.5-3.5 g / L.

[0027] Step (3): Then drain and wash with water.

[0028] Further, during the soaping process of the fabric, the solution temperature is raised to 95-100℃ and held for 10-20 min, and then washed with water and dried. For example, it can be at 98℃ and held for 15 min. Preferably, the heating rate during the soaping process is 0.5-1.5℃ / min (preferably, the heating rate is 0.8-1.3℃ / min).

[0029] The specific embodiments of the present application are described in detail below. It should be understood that the specific embodiments described herein are only for illustration and explanation of the present application, and are not intended to limit the present application.

[0030] Example 1 The present group of examples provides a yellow dye composition, and the preparation method thereof is: 1. Preparation: Prepare compound A and compound B according to the mass ratio recorded in Table 1; 2. Mixing: Compound A and Compound B are mixed according to the required weight ratio, and mixed uniformly by ball milling, to obtain the yellow dye composition.

[0031] Table 1. Comparative Example 1 This comparative example provides Reference Dye 1, which only contains 100wt% of Compound A.

[0032] Comparative Example 2 This comparative example provides Reference Dye 2, which only contains 100wt% of Compound B.

[0033] Comparative Example 3 This comparative example provides Reference Dye 3, which contains Compound A and Compound B, the mass percentage of Compound A is 10%, and the mass percentage of Compound B is 90%.

[0034] Comparative Example 4 This comparative example provides Reference Dye 4, which contains Compound A and Compound B, the mass percentage of Compound A is 90%, and the mass percentage of Compound B is 10%.

[0035] Performance test Detection method / test method 1. Color fastness determination: Light fastness determination: according to national standard GB / T 8427-2019; Light and sweat fastness determination: according to national standard GB / T 14576-2009; Chlorinated water fastness determination: according to national standard GB / T 8433-2013; Washing fastness determination: according to international standard ISO 105C10-2006B; Sweat fastness determination: according to standard ISO 105C10-2006; Rubbing fastness determination: according to standard ISO 105X12-2006.

[0036] The yellow dye composition 4 provided in Example 4 is used as the dye to determine the solubility and color fastness, and the results are shown in Table 2: Table 2. Solubility and color fastness determination results Therefore, the pigment composition provided by the application has large solubility at 25 DEG C and is easy to dissolve; meanwhile, the pigment composition has excellent stability and fastness indexes, which are specifically shown as follows: the light fastness, light and sweat composite fastness, chlorine water fastness, washing fastness, sweat fastness and rubbing fastness (dry rubbing) are all above grade 4, and the rubbing fastness (wet rubbing) can also be maintained at grade 3-4.

[0037] Figure 1 The detection result chart of chlorine water fastness is shown by taking the yellow dye composition 5 provided in Example 5 as a dye.

[0038] Figure 2 The detection result chart of washing fastness is shown by taking the yellow dye composition 6 provided in Example 6 as a dye, and it can be seen from the chart that the washing fastness of the dye is grade 4.

[0039] Figure 3 The detection result chart of alkali sweat fastness is shown by taking the yellow dye composition 3 provided in Example 3 as a dye, and it can be seen from the chart that the alkali sweat fastness of the dye is grade 4.

[0040] 2. Homochromaticity test: The following dyeing method is used to dye the Tencel wool to investigate the homochromaticity of the dye.

[0041] (1) The fabric to be dyed is immersed in a dye bath containing the yellow dye composition or the reference dye at 40 DEG C, and the dyeing concentration is 0.5%o.w.f, 1.0%o.w.f and 2.0%o.w.f respectively, and the dye bath also contains sodium sulfate with the concentration of 20 g / L, 30 g / L and 40 g / L respectively, after 30 min of heat preservation, pure soda (concentration of 3 g / L) is added, and the heat preservation is continued for 10 min. (2) The temperature of the dye bath is increased to 80 DEG C at the rate of 1 DEG C / min, and after 25-35 min of heat preservation, the dye bath is cooled; (3) The obtained fabric is subjected to soaping at 98 DEG C for 15 min.

[0042] The color difference dE of the fabric after dyeing is tested by using a Datacolor colorimeter, and the test results are recorded in Table 3: Table 3. Color difference test results of the fabric As shown in Table 3, compared with the reference dye, the color difference DE of the yellow dye composition provided by the examples of the application is all below 1.11, which indicates that the homochromaticity is good, and the color with consistent hue and depth can be obtained on the whole fabric. Among them, the homochromaticity of the yellow dye composition 3 provided in Example 3 is the best, and the dyeing effect on the Tencel wool is shown in Figure 4

[0043] ​1. Photosensitivity test: The yellow dye composition 3 provided in Example 3 and the reference dyes 1-4 were subjected to photosensitivity test by using the photosensitivity test software of Datacolor 1000 colorimeter, and the color difference (CIE DE) of the fabric to be dyed at 0.5% o.w.f concentration was tested. The test results are shown in Table 4.

[0044] Table 4. Photosensitivity test results As shown in Table 4, the yellow dye composition 3 provided in Example 3 has a small color difference change and a CIE DE value obtained by photosensitivity test, and its photosensitivity test curve is shown in Figure 5 It is shown that the yellow dye composition 3 provided in Example 3 has no photochromism. Under the same conditions, the reference dyes 1-4 have a large degree of color difference change. It is shown that the compounds A and B play a synergistic effect and jointly promote the non-photochromism of the dye composition.

[0045] The specific embodiments are only an explanation of the present application, and are not a limitation of the present application. Those skilled in the art can make modifications to the embodiments without creative contribution after reading the specification, and the modifications are protected by the patent law as long as they are within the scope of the claims of the present application.

Claims

1. A yellow dye compound, characterized in that, It includes compound A and compound B; The structure of compound A is shown in formula (I): The structure of compound B is shown in formula (II):

2. The yellow dye composition according to claim 1, characterized in that, The mass ratio of compound A to compound B is 20-80:80-20.

3. The yellow dye composition according to claim 2, characterized in that, The mass ratio of compound A to compound B is 30-60:40-70.

4. The application of a yellow dye composition as described in any one of claims 1-3, characterized in that, Application of the dye composition in the coloring of acetate fiber, cotton fiber, nylon fiber, polyester fiber, polyacrylonitrile fiber, wool fiber, and fiber blends.

5. The application of the yellow dye composition according to claim 4, characterized in that, The dyeing process is either immersion dyeing or pad dyeing.

6. A dyeing method for a yellow dye composition as described in any one of claims 1-3, characterized in that, It includes: Immerse the fabric to be dyed in a dye bath containing the yellow dye composition and electrolyte salt at 55-65℃, keep it warm for 25-35 minutes, add dyeing auxiliaries, continue to keep it warm for 55-65 minutes, then drain the liquid and wash with water and soap.

7. The dyeing method of the yellow dye composition according to claim 6, characterized in that, During the soaping process of the fabric, the solution temperature is raised to 95-100℃ and kept at that temperature for 10-20 minutes, followed by washing with water and drying.

8. The dyeing method of the yellow dye composition according to claim 7, characterized in that, The heating rate during the soaping process is 0.5-1.5℃ / min.

9. The yellow dye composition according to claim 6, characterized in that, The dyeing auxiliaries include one or more of the following: pH adjuster, dispersant, leveling agent, and fixing agent.

10. The dyeing method of the yellow dye composition according to claim 6, characterized in that, The electrolyte salt is anhydrous sodium sulfate, and the concentration of anhydrous sodium sulfate in the dye bath is 20-40 g / L; the fixing agent is soda ash, and the concentration of soda ash is 2-4 g / L.

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