Yellow disperse dye composition and preparation method thereof

Abstract

The invention is applicable to the technical field of chemical dyes, and particularly relates to a yellow disperse dye composition and a preparation method thereof, the yellow disperse dye composition comprises 100 parts of a first compound and 3-20 parts of a second compound. The composition of the yellow disperse dye provided by the invention overcomes the defect that the PH dependency range of various solutions is relatively narrow after the C.I. Disperse yellow 23 is forbidden, and provides a substitute of the C.I. Disperse yellow 23 with better alkali resistance.

Description

Technical Field

[0001] The invention belongs to the technical field of chemical dyes, and in particular relates to a yellow disperse dye composition and a preparation method thereof. Background Art

[0002] CI Disperse Yellow 23 is an older dye. Its moderate color fastness and wide pH adaptability, allowing for excellent dyeing within the pH range of 3-13, along with its low cost, have led to its widespread use as one of the three primary colors for disperse dyes. However, due to its potential to release harmful aromatic amines, it has been banned in both the EU and my country. Since then, the search for alternatives to CI Disperse Yellow 23 has become a major research topic for dye professionals.

[0003] Chinese Patent ZL200410018544.7 (Comparative Patent 1) discloses a color combination scheme whose main component, the compound of formula (I), is CI Disperse Yellow 54. However, the production process of CI Disperse Yellow 54 intermediates generates a large amount of waste acid, which poses a significant environmental risk. Furthermore, CI Disperse Yellow 54 has a narrow pH dependence, ranging from pH 3 to 9, and the dyes used in its color combination also have a narrow pH dependence, limiting its application range.

[0004] Chinese patent ZL202010331510.2 (Comparative Patent 2) provides a variety of possible solutions, listing more than twenty color matching dyes. The dye of formula (I-1) prepared with 2-aminobenzonitrile as raw material has better pH dependence than CI Disperse Yellow 54, so the obtained comparative patent 2 dye is also stronger than the pH dependence of the dye of comparative patent 1. See Table 4 of Example 25 of Comparative Patent 2. When the pH is 10, the dye intensity of comparative patent 1 drops to 86.7%, while the dye intensity of comparative patent 2 is still 91%. The pH dependence of comparative patent 2 is slightly less than 10, which is still a gap from the alkali resistance of CI Disperse Yellow 23.

[0005] Chinese patent ZL201410471422.7 (Compared to Patent 3) provides a two-color solution, but the pH dependence of this solution is still not wide enough, and the alkali resistance reaches pH 11. When pH 12, the strength of the dye drops to 95.2%.

[0006] The alternative compositions provided by existing solutions have poor alkali resistance and are difficult to adapt to different pH environments. Summary of the Invention

[0007] The present invention aims to provide a yellow disperse dye composition, aiming to solve the problem that the alternative compositions provided by existing solutions have poor alkali resistance and are difficult to adapt to different pH environments.

[0008] The present invention is achieved by providing a yellow disperse dye composition, comprising a first compound and a second compound, wherein the first compound is represented by:

[0009]

[0010] The second compound is represented by:

[0011]

[0012] The amount of the first compound is 100 parts, and the amount of the second compound is 3-20 parts.

[0013] Preferably, the amount of the second compound is 5-15 parts.

[0014] Another object of the present invention is to provide a method for preparing the yellow disperse dye composition as described above, the method comprising:

[0015] Adding glass beads to water, adding a diffusing agent while stirring, continuing stirring, and adding the first compound, grinding until the degree of diffusion reaches a predetermined level; adding the diffusing agent again, stirring, obtaining a first mixture, and measuring the solid content;

[0016] Replacing the first compound in the above step with the second compound to obtain a second mixture, and measuring the solid content;

[0017] The first mixture and the second mixture are mixed in a preset ratio according to the solid content, and spray-dried to obtain a yellow disperse dye composition.

[0018] Preferably, the dispersant is dispersant MF or sodium lignin sulfonate or a mixture of dispersant MF and sodium lignin sulfonate.

[0019] Preferably, the specific steps of the method are:

[0020] By weight, 350 parts of glass beads having a diameter of 1-2 mm were added to 110 parts of water. 35 parts of a diffusing agent was added during stirring. Stirring was continued, and 50 parts of a first compound was added. The mixture was ground until the degree of diffusion reached a predetermined level. 15 parts of a diffusing agent was added, and the mixture was stirred for 10-20 minutes. The glass beads were filtered to obtain a first mixture, and the solid content of the first mixture was determined.

[0021] Replacing the first compound in the above step with the second compound to obtain a second mixture, and measuring the solid content;

[0022] According to the solid content, a first mixture containing 100 parts of the first compound and a second mixture containing 10 parts of the second compound were mixed and spray-dried to obtain a yellow disperse dye composition.

[0023] Preferably, in the step of grinding until the diffusion degree reaches a preset level, the grinding time is 3-5 hours and the diffusion degree reaches level 4.5-5.

[0024] Preferably, in the spray drying step, the inlet temperature is 120-130°C and the outlet temperature is 60-70°C.

[0025] The yellow disperse dye composition provided by the present invention overcomes the weakness of the narrow pH dependence range of various solutions after the ban of CI Disperse Yellow 23, and provides a substitute for CI Disperse Yellow 23 with better alkali resistance. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the attached structural diagrams and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0027] A yellow disperse dye composition, characterized in that the yellow disperse dye composition comprises a first compound and a second compound, wherein the first compound is represented by:

[0028]

[0029] The second compound is represented by:

[0030]

[0031] The amount of the first compound is 100 parts, and the amount of the second compound is 3-20 parts.

[0032] In this embodiment, based on a large number of experiments and screening, the first compound was selected as the main yellow component, and the second compound was further selected as the orange component for color matching.

[0033] The present invention provides a color combination scheme, which uses a yellow dye of a first compound as a main component and is supplemented with a small amount of an orange dye of a second compound to perform color combination, so as to replace CI Disperse Yellow 23.

[0034] The color matching ratio is: for every 100 parts of the first compound, the compound contains 3-20 parts of the second compound by weight.

[0035] In order to achieve a color similar to CI Disperse Yellow 23, the color matching ratio is: for every 100 parts of the first compound, it contains 5-15 parts of the second compound by weight.

[0036] After finding and confirming the first compound, we tried various color combinations with disperse orange and finally settled on this one. After testing, this solution has an alkali resistance of pH 12.

[0037] On the basis of determining the yellow component, screening different orange components can obtain a substitute for CI Disperse Yellow 23 with better alkali resistance.

[0038] See Table 1 for data comparison:

[0039] Table 1. Comparison of alkali resistance of various solutions

[0040]

[0041] In an embodiment of the present invention, 350 g of glass beads with a diameter of 1-2 mm were added to 110 g of water, and 35 g of the diffusing agent MF was added under stirring.

[0042] Gradually add 50 grams of the first compound and 2.5 grams of the second compound dye under stirring,

[0043] Grind at high speed for 3-5 hours until the diffusion reaches level 4.5-5.

[0044] Then add 15 grams of water and 15 grams of dispersant MF and stir for 10-20 minutes.

[0045] The glass beads were filtered out with a sieve, and the obtained slurry was spray-dried (inlet temperature 120-130° C., outlet temperature 60-70° C.) to obtain about 90 g of a dry disperse dye composition.

[0046] In one embodiment of the present invention, 350 g of glass beads with a diameter of 1-2 mm were added to 110 g of water, and 35 g of the diffusing agent MF was added under stirring.

[0047] 50 g of the first compound was gradually added while continuing to stir.

[0048] Grind at high speed for 3-5 hours until the diffusion reaches level 4.5-5.

[0049] Then add 15 g of dispersant MF and stir for 10-20 minutes.

[0050] The glass beads were filtered out with a sieve, and the obtained slurry was spray-dried (inlet temperature 120-130° C., outlet temperature 60-70° C.) to obtain about 90 g of the disperse dye dry product of the first compound.

[0051] According to the above steps, the first compound is replaced by the second compound to obtain about 90 grams of the disperse dye dry product of the second compound.

[0052] 50 g of the dry disperse dye of the first compound was weighed and fully mixed with 5 g of the dry disperse dye of the second compound to obtain 55 g of a yellow disperse dye composition.

[0053] In one embodiment of the present invention, 350 g of glass beads with a diameter of 1-2 mm were added to 110 g of water, and 35 g of the diffusing agent MF was added under stirring.

[0054] 50 g of the first compound was gradually added while continuing to stir.

[0055] Grind at high speed for 3-5 hours until the diffusion reaches level 4.5-5.

[0056] Then add 15 g of dispersant MF and stir for 10-20 minutes.

[0057] The glass beads were filtered out with a sieve and the resulting slurry was used to determine the solid content.

[0058] According to the above steps, the first compound is replaced by the second compound to obtain a slurry containing the second compound, and the solid content is measured.

[0059] According to the measured solid content, the slurry containing the first compound (first mixture) and the slurry containing the second compound (second mixture) are mixed in a weight ratio of 100:20 (for example, the first mixture containing 30 grams of the first compound is mixed with the second mixture containing 6 grams of the second compound), and then spray dried (inlet temperature 120-130°C, outlet temperature 60-70°C) to obtain about 100 grams of the disperse dye composition.

[0060] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A composition of yellow disperse dye, characterized in that, The yellow disperse dye composition comprises a first compound and a second compound, wherein the first compound is represented by: The second compound is represented by: The amount of the first compound is 100 parts, and the amount of the second compound is 3-20 parts.

2. The composition of yellow disperse dye according to claim 1, wherein The amount of the second compound used is 5-15 parts.

3. A method for preparing a composition of yellow disperse dyes as claimed in claim 1 or 2, characterized in that, The method comprises: Adding glass beads to water, adding a diffusing agent while stirring, continuing stirring, and adding the first compound, grinding until the degree of diffusion reaches a predetermined level; adding the diffusing agent again, stirring, obtaining a first mixture, and measuring the solid content; Replacing the first compound in the above step with the second compound to obtain a second mixture, and measuring the solid content; The first mixture and the second mixture are mixed in a preset ratio according to the solid content, and spray-dried to obtain a yellow disperse dye composition.

4. The preparation method of the composition of yellow disperse dye according to claim 3, wherein The dispersant is dispersant MF or sodium lignin sulfonate or a mixture of dispersant MF and sodium lignin sulfonate.

5. The preparation method of the composition of yellow disperse dye according to claim 3, wherein The specific steps of the method are: By weight, 350 parts of glass beads having a diameter of 1-2 mm were added to 110 parts of water. 35 parts of a diffusing agent was added during stirring. Stirring was continued, and 50 parts of a first compound was added. The mixture was ground until the degree of diffusion reached a predetermined level. 15 parts of a diffusing agent was added, and the mixture was stirred for 10-20 minutes. The glass beads were filtered to obtain a first mixture, and the solid content of the first mixture was determined. Replacing the first compound in the above step with the second compound to obtain a second mixture, and measuring the solid content; According to the solid content, a first mixture containing 100 parts of the first compound and a second mixture containing 10 parts of the second compound were mixed and spray-dried to obtain a yellow disperse dye composition.

6. The method for preparing a composition of yellow disperse dye according to claim 5, wherein In the step of grinding until the diffusion degree reaches a preset level, the grinding time is 3-5 hours, and the diffusion degree reaches level 4.5-5.

7. The preparation method of the composition of yellow disperse dye according to claim 5, wherein In the spray drying step, the inlet temperature is 120-130°C and the outlet temperature is 60-70°C.

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