Non-photosensitive yellow dye composition as well as application and dyeing method thereof

Abstract

The invention relates to the field of dyes, and particularly discloses a non-photosensitive yellow dye composition as well as application and a dyeing method thereof. The yellow dye composition is formed by compounding the compound A as shown in the formula (I) and the compound B as shown in the formula (II), the photosensitivity of the dye is reduced through synergistic interaction of the two compounds, the color fastness is improved, and the dye composition has the advantages of being good in homochromatism, free of photosensitivity and high in color fastness.

Description

Technical Field

[0001] This application relates to the field of dyes, and more specifically, to a non-photosensitive yellow dye composition and its application and dyeing method. Background Technology

[0002] In the field of textile dyeing, dyeing technology has developed rapidly, playing a crucial role in improving the quality of textiles and enriching their color expression. With socio-economic development and rising living standards, consumers have increasingly stringent requirements for the color and quality of textiles, prompting continuous improvement and optimization of dyeing processes.

[0003] Existing dyeing methods can generally be divided into two-bath methods, one-bath two-step methods, and one-bath one-step methods. These methods are also applicable to the dyeing of yellow dyes. The two-bath method includes two approaches: first, disperse dyeing under high temperature and pressure or carrier dyeing, followed by reactive dye dyeing; and second, reactive dye dyeing followed by disperse dyeing under high temperature and pressure or carrier dyeing. It allows different types of yellow dyes to be applied to the fabric separately by operating in different dye baths sequentially. For example, when dyeing yellow, disperse yellow dye is first applied under high temperature and pressure, followed by further treatment with reactive yellow dye. The one-bath two-step method also has two scenarios: disperse dyeing followed by reactive dyeing, and reactive dyeing followed by disperse dyeing. After one type of yellow dye has been applied or fixed, the dye bath is not completely drained; only the pH and temperature are adjusted before adding the second type of yellow dye to continue dyeing. The one-bath one-step method, or one-bath method, involves preparing two yellow dyes in the same dye bath and applying and fixing them to the two fibers separately under acidic, neutral, alkaline, or sliding pH conditions during the same temperature rise process. The dyeing process is then completed through washing and soaping.

[0004] In existing technologies, traditional yellow dyes suffer from significant photosensitivity. Many yellow dyes readily undergo chemical reactions under light exposure, leading to the destruction of their molecular structure and causing fading and discoloration of textiles, severely impacting the product's appearance. Furthermore, existing dye compositions struggle to guarantee stable colorfastness in one-bath dyeing processes, resulting in dyed textiles prone to color fading during subsequent use. This reduces the product's durability and market competitiveness, failing to meet consumer demand for high-quality, long-lasting textiles. Summary of the Invention

[0005] To address the aforementioned technical problems, this application provides a non-photosensitive yellow dye composition, its application, and a dyeing method thereof.

[0006] The technical solution adopted in this application is as follows: In a first aspect, this application provides a non-photosensitive yellow dye composition comprising 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):

[0007] Furthermore, in the non-photosensitive yellow dye composition of this application, compound A and compound B are in a mass ratio of 10-90:90-10.

[0008] Preferably, the mass ratio of compound A to compound B is 35-65:65-35.

[0009] Furthermore, in the non-photosensitive yellow dye composition of this application, the aforementioned yellow dye composition also includes a dyeing auxiliary agent.

[0010] Preferably, the dyeing auxiliaries include one or more of electrolyte salts, pH adjusters, dispersants, leveling agents, and fixing agents.

[0011] Secondly, this application provides the application of the above-mentioned non-photosensitive yellow dye composition in the coloring of cellulose fibers, polyamide fibers, protein fibers, polyester fibers, and fiber blends.

[0012] Thirdly, this application provides a dyeing method for the above-mentioned yellow dye composition, comprising: (1) Immerse the fabric to be dyed in a dye bath containing the yellow dye composition and electrolyte salt at 35-45℃, keep it warm for 25-45 minutes, add soda ash, and continue to keep it warm for 5-15 minutes. (2) Increase the temperature of the dye bath to 75-85℃ at a rate of 0.5-1.5℃ / min, hold for 25-35 minutes, and then cool. (3) Wash the resulting fabric with water and soap.

[0013] Furthermore, in the dyeing method of the yellow dye composition provided in this application, the dyeing concentration of the yellow dye composition in the dye bath is 0.1-4.0% owf.

[0014] Furthermore, in the dyeing method of the yellow dye composition provided in this application, the electrolyte salt is sodium sulfate, the concentration of sodium sulfate in the dye bath is 20-40 g / L, and the concentration of soda ash is 2-4 g / L.

[0015] Furthermore, in the dyeing method of the yellow dye composition provided in this application, the temperature of the soaping is 95-100°C, and the washing time is 10-20 minutes.

[0016] In summary, this application has the following beneficial effects: 1. Since this application uses compound A as shown in formula (I) and compound B as shown in formula (II) to form a non-photosensitive yellow dye composition, the synergistic effect reduces photosensitivity and improves color fastness, so that the dye composition has the characteristics of good color uniformity, no photosensitivity and high color fastness.

[0017] 2. The non-photosensitive yellow dye composition formed by compound A and compound B can be used for coloring cellulose fibers, polyamide fibers, protein fibers, polyester fibers, and fiber blends. This dye composition has the characteristics of good color uniformity, no photosensitivity, and high color fastness. The compound compounding has a synergistic effect to reduce photosensitivity and improve color fastness, which can achieve better dyeing results. Furthermore, dyeing auxiliaries can be added to this dye composition to further optimize the dyeing process.

[0018] 3. In the dyeing method provided in this application, the fabric to be dyed is immersed in a dye bath containing a yellow dye composition of compound A and compound B and electrolyte salt at a specific temperature and kept at that temperature for a certain period of time. Then, soda ash is added and the temperature is kept at that temperature for a longer period of time. After that, the temperature is increased at a specific rate and kept at that temperature. Finally, the fabric is washed with water and soaped. This dyeing method allows the two compounds to work synergistically, effectively reducing the photosensitivity of the yellow dye composition and significantly improving the color fastness of the dyed fabric. Moreover, this dyeing method is relatively simple to operate and can improve production efficiency. Attached Figure Description

[0019] Figure 1 These are images showing the dyeing results of the yellow dye composition provided in this application on three fabrics; Figure 2 These are the results of the water wash fastness test of the yellow dye composition provided in this application; Figure 3 These are the results of light fastness and light perspiration combined fastness tests of the yellow dye composition of this application; Figure 4 These are the results of the acid perspiration fastness test of the yellow dye composition of this application; Figure 5 These are the results of the alkali perspiration fastness test of the yellow dye composition of this application; Figure 6 These are the results of the lightfastness test of the yellow dye composition of this application; Figure 7 This is a photosensitivity test curve of the yellow dye composition of this application. Detailed Implementation

[0020] The embodiments of the present invention will be described in detail below with reference to the examples. However, those skilled in the art will understand that the following examples are only for illustrating the present invention and should not be regarded as limiting the scope of the present invention. Specific conditions not specified in the examples shall be carried out according to conventional conditions or conditions recommended by the manufacturer. Reagents or instruments whose manufacturers are not specified are all conventional products that can be purchased commercially.

[0021] The technical solution of this invention is as follows: This application provides a non-photosensitive yellow dye composition comprising 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):

[0022] Compound A was synthesized according to the method disclosed in the patent, and compound B was synthesized based on compound A using the following method: 72.8g of compound A was dissolved in 500ml of water, and 5.6g of porphyrin was added. The mixture was stirred until completely dissolved, and the solution was heated to 80℃. Sodium carbonate was added continuously to maintain a stable pH. The reaction was stopped when the pH began to rise. The reaction was then complete. Salting out or spray drying was used to obtain 70g of dried product, which was identified as compound B by structure.

[0023] The preparation method of the non-photosensitive yellow dye composition of this application includes: mixing compound A and compound B in a certain weight ratio, which can be mechanical mixing or ball milling. The ratio can be 10-90:90-10; or 20-80:80-20; or 30-70:70-30; or 40-60:70-30; or 50:50, etc.

[0024] The above-mentioned yellow dye composition also includes dyeing auxiliaries. The types of dyeing auxiliaries can be conventionally selected in the art, such as one or more of electrolyte salts, pH adjusters, dispersants and leveling agents. The amount of dyeing auxiliaries can also be selected according to actual needs, without particular limitation, but generally does not exceed 15% of the total weight of the dye bath composition.

[0025] Among them, the electrolyte salt can be selected from sodium sulfate, sodium chloride, potassium chloride and other electrolyte salts. The amount of electrolyte salt used is generally 0 to 8% of the total weight of the dye bath composition, more preferably 2 to 5%. The pH adjuster can be selected from sodium dihydrogen phosphate, disodium hydrogen phosphate, sodium borate, sodium acetate, sodium carbonate and other acidic pH adjusters. The amount of pH adjuster used is generally 0 to 5% of the total weight of the dye bath composition, more preferably 0.5 to 2%. The dispersant and leveling agent are also conventional choices in dyeing processes and dye preparations.

[0026] The following provides a detailed description of specific embodiments of the present invention. It should be understood that the specific embodiments described herein are for illustrative and explanatory purposes only and are not intended to limit the scope of the invention.

[0027] Examples 1-9 This set of embodiments provides a non-photosensitive yellow dye composition, wherein the mass percentage of each component is shown in Table 1, and the composition is obtained by mechanical grinding.

[0028] Table 1. Comparative Examples 1-4 A reference dye is provided as a comparative example, wherein the mass percentage of each component is shown in Table 2, and the dye is obtained by mechanical grinding.

[0029] Table 2. Performance testing Detection methods / test methods 1. Colorfastness test: The following dyeing methods were used to dye double-knitted cotton fabric, laboratory viscose, and RC fabric (a 50 / 50 blend of viscose and cotton) to investigate the color homology between the yellow dye composition and the reference dye: (1) Immerse the fabric to be dyed in a dye bath containing a yellow dye composition or a reference dye at 40°C. The dyeing concentrations are 0.5% owf, 1.0% owf and 2.0% owf, respectively. The dye bath also contains sodium sulfate at concentrations of 20 g / L, 30 g / L and 40 g / L, respectively. After keeping it warm for 30 min, add soda ash (concentration of 3 g / L) and continue to keep it warm for 10 min. (2) Increase the temperature of the dye bath to 80℃ at a rate of 1℃ / min, keep it at that temperature for 25-35 minutes, and then cool it. (3) The resulting fabric was soaped at 98°C for 15 minutes.

[0030] After dyeing, the color difference dE of the fabric was measured using a Datacolor colorimeter, and the test results are recorded in Table 3: Table 3. Color difference test results of fabrics Dye Name Color difference dE Yellow dye composition 1 1.11 Yellow dye composition 2 1.02 Yellow dye composition 3 0.75 Yellow dye composition 4 0.59 Yellow dye composition 5 0.90 Yellow dye composition 6 0.83 Yellow dye composition 7 0.91 Yellow dye composition 8 0.91 Yellow dye composition 9 1.06 Reference dye 1 2.19 Reference dye 2 3.07 Reference dye 3 2.99 Reference dye 4 3.78 As shown in Table 3, compared with the reference dye, the color difference DE of the yellow dye compositions provided in this application is all below 1.11, indicating that they have good color uniformity and can obtain a color with consistent hue and depth on the entire fabric. Among them, yellow dye composition 4 has the best color uniformity, and its dyeing results on the three fabrics are as follows: Figure 1 As shown.

[0031] 2. Color fastness test: 1. Test of color fastness to washing: Tested according to international standard ISO 105C10-2006B; dyeing concentration is 3.3% owf, washed at 60℃.

[0032] The measurement results are shown in Table 4: Table 4. Results of color fastness test for washing As shown in Table 4, according to the testing requirements of international standard ISO 105C10-2006B, the yellow dye compositions 1-9 provided by this invention all exhibit excellent water fastness. Among them, the water fastness test results for yellow dye composition 5 are as follows: Figure 2 As shown.

[0033] 2. Test of light / perspiration fastness: Light fastness was tested according to national standard GB / T 8427-2019; combined light and perspiration fastness was tested according to national standard GB / T14576-2009.

[0034] The measurement results are shown in Table 5: Table 5. Results of light / perspiration fastness test As shown in Table 5, the yellow dye compositions 1-9 provided by this invention all exhibit excellent light fastness and light-perspiration combined fastness, which are superior to reference dyes 1-4. The light fastness and light-perspiration combined fastness test results for yellow dye composition 5 are as follows: Figure 3 As shown.

[0035] 3. Test for color fastness to perspiration: Tested according to national standard GB / T3922-2013; The measurement results are shown in Tables 6 and 7: Table 6. Results of color fastness test for acid perspiration. Table 7. Results of Alkali Perspiration Color Fastness Test As shown in Tables 6 and 7, compared to reference dyes 1-4, the yellow dye compositions 1-9 provided by this invention all exhibit excellent color fastness to perspiration. Specifically, the color fastness to acid and alkali perspiration of yellow dye composition 6 is as follows: Figure 4 and 5 As shown in the figure, the dyed fabric is basically white when it stains the six-fiber fabric, which indicates that the color fastness is high.

[0036] 4. Test of color fastness to light: Tested according to AATCC 16.3 (Colorfastness to Light: Xenon-Arc) standard.

[0037] The measurement results are shown in Table 8: Table 8. Results of color fastness to perspiration test As shown in Table 8, compared with reference dyes 1-4, the yellow dye compositions 1-9 provided by the present invention all exhibit excellent lightfastness. Among them, the lightfastness test results of yellow dye composition 6 at exposure energy values ​​of 20 AFU and 40 AFU are as follows: Figure 6 As shown in the figure, the color fastness to light of this dye composition can reach grade 4-5 at dyeing concentrations of 0.5-4.0% owf. Only when the dyeing concentration is 0.1% owf and the exposure energy is 40 AFU, the color fastness to light is grade 4.

[0038] 3. Photosensitivity test: Extract the above-mentioned yellow dye composition 6 and reference dyes 1-2, and test the color difference (CIE DE) of the fabric to be dyed at a concentration of 0.5% owf using the Datacolor 1000 colorimeter photosensitive testing software. The test results are recorded in Table 9.

[0039] Table 9. Results of photosensitivity measurement As shown in Table 9, the yellow dye composition 6 provided in this application, at a dyeing concentration of 0.5% owf, exhibits a small color difference in the CIE DE value obtained through photosensitivity testing, as shown in the photosensitivity test curve. Figure 7 As shown. However, under the same conditions, reference dye 1 and reference dye 2 exhibit significant color difference variations.

[0040] 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 non-photosensitive yellow dye composition, 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 non-photosensitive yellow dye composition according to claim 1, characterized in that, The mass ratio of compound A to compound B is 10-90:90-10.

3. The non-photosensitive yellow dye composition according to claim 2, characterized in that, The mass ratio of compound A to compound B is 35-65:65-35.

4. The non-photosensitive yellow dye composition according to claim 1, characterized in that, The yellow dye composition also includes dyeing auxiliaries.

5. The non-photosensitive yellow dye composition according to claim 4, characterized in that, The dyeing auxiliaries include one or more of the following: electrolyte salts, pH adjusters, dispersants, leveling agents, and fixing agents.

6. The application of a non-photosensitive yellow dye composition as described in any one of claims 1-5, characterized in that, Application of the dye composition in coloring cellulose fibers, polyamide fibers, protein fibers, polyester fibers, and fiber blends.

7. A dyeing method using a yellow dye composition as described in any one of claims 1-5, characterized in that, It includes: Immerse the fabric to be dyed in a dye bath containing the yellow dye composition and electrolyte salt at 35-45℃, keep it warm for 25-45 minutes, add soda ash, and continue to keep it warm for 5-15 minutes. The solution temperature is raised to 75-85℃ at a rate of 0.5-1.5℃ / min, held at that temperature for 25-35 min, and then cooled. The resulting fabric is then washed with water and soap.

8. The dyeing method of the yellow dye composition according to claim 7, characterized in that, In the dye bath, the dyeing concentration of the yellow dye composition is 0.1-4.0% owf.

9. The dyeing method of the yellow dye composition according to claim 7, characterized in that, The electrolyte salt is sodium sulfate, the concentration of sodium sulfate in the dye bath is 20-40 g / L, and the concentration of soda ash is 2-4 g / L.

10. The dyeing method of the yellow dye composition according to claim 7, characterized in that, The soaping temperature is 95-100℃, and the washing time is 10-20 minutes.

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