Navy to black disperse dye composition and disperse dye product thereof

Abstract

The present invention provides a navy to black disperse dye composition and disperse dye products thereof, specifically relating to the technical field of dye chemical industry. The composition comprises at least one dye A having a structure as shown in Formula I, at least one dye B having a structure as shown in Formula II, and at least one dye C having a structure as shown in Formula III. In Formula I, R1 is a methyl, ethyl, or isopropoxypropyl group; in Formula II, R2 is a methyl or hydrogen group; R3 is a methyl, ethyl, or propyl group; R4 is a methylene or ethylene group; R5 is a methyl or ethyl group; in Formula III, R6 is a methyl or hydrogen group; R7 is a methyl, ethyl, or propyl group; R8 is a methylene or ethylene group; and R9 is a methyl or ethyl group.

Description

Technical Field

[0001] The present invention relates to the technical field of dye chemical industry, in particular to a navy blue to black disperse dye composition and a disperse dye product thereof. Background Art

[0002] In recent years, countries around the world have prioritized the development of new materials as a crucial aspect of economic growth and technological advancement. Various new textile fibers are crucial materials in today's high-tech sectors. The global market for new fiber products exceeds $100 billion, making them one of the textile industry's new strategic pillar industries. The new textile fiber industry boasts high technological content, a large market, and widespread impact. Vigorously developing the new textile fiber industry and achieving breakthroughs in key technologies and industries are of great significance for enhancing the core competitiveness of my country's textile industry and promoting its transformation and upgrading.

[0003] Polylactic acid (PLA) fiber, a new type of textile fiber, is made from starchy agricultural products such as corn, wheat, and sugar beets. It is fermented to produce lactic acid, which is then polycondensed, melt-melted, and spun. PLA fiber is a synthetic fiber made from easily cultivated, plantable raw materials, and its waste is naturally biodegradable. Microbial decomposition in soil or seawater produces carbon dioxide and water, and combustion does not emit toxic gases or pollute the environment, making it a sustainable, ecological fiber. Its fabric offers excellent hand feel and drape, UV resistance, and processing properties, making it suitable for a variety of fashion, casual wear, sporting goods, and hygiene products, with broad application prospects.

[0004] With the rapid development of new textile fibers, there are correspondingly higher requirements for dye products suitable for these new textile fibers. Currently, there are very few dye products on the market that are suitable for new textile fibers, especially polylactic acid fibers. Therefore, the development of a dye product for dyeing polylactic acid fibers is imminent.

[0005] In view of this, the present invention is proposed. Summary of the Invention

[0006] One of the objects of the present invention is to provide a navy to black disperse dye composition to alleviate at least one of the above-mentioned technical problems in the prior art.

[0007] A second object of the present invention is to provide a disperse dye product.

[0008] A third object of the present invention is to provide a method for preparing a disperse dye product.

[0009] A fourth object of the present invention is to provide an application of a disperse dye product.

[0010] In order to achieve the above-mentioned purpose of the present invention, the following technical solutions are adopted:

[0011] The first aspect of the present invention provides a navy to black disperse dye composition, comprising at least one dye A having a structure as shown in formula I, at least one dye B having a structure as shown in formula II, and at least one dye C having a structure as shown in formula III;

[0012]

[0013] In formula I, R1 is methyl, ethyl or isopropoxypropyl;

[0014]

[0015] In formula II, R2 is methyl or hydrogen; R3 is methyl, ethyl or propyl; R4 is methylene or ethylene; R5 is methyl or ethyl;

[0016]

[0017] In formula III, R6 is methyl or hydrogen; R7 is methyl, ethyl or propyl; R8 is methylene or ethylene; R9 is methyl or ethyl.

[0018] Furthermore, in the navy blue to black disperse dye composition, the dye A accounts for 30 wt.%-60 wt.%, the dye B accounts for 1 wt.%-20 wt.%, and the dye C accounts for 30 wt.%-70 wt.%.

[0019] Furthermore, in the navy blue to black disperse dye composition, the dye A accounts for 35 wt.%-55 wt.%, the dye B accounts for 1 wt.%-10 wt.%, and the dye C accounts for 40 wt.%-60 wt.%.

[0020] The second aspect of the present invention provides a disperse dye product, comprising a dispersant and the navy to black disperse dye composition.

[0021] Furthermore, in the disperse dye product, the navy to black disperse dye composition accounts for 10 wt.% to 50 wt.%, and the remainder is a dispersant.

[0022] Furthermore, in the disperse dye product, the dispersant includes an anionic dispersant and / or a nonionic dispersant.

[0023] Preferably, the anionic dispersant includes at least one of naphthalenesulfonic acid formaldehyde condensate, alkylnaphthalenesulfonic acid formaldehyde condensate, benzylnaphthalenesulfonic acid formaldehyde condensate and lignin sulfonate.

[0024] Preferably, the nonionic dispersant includes alkylphenol polyoxyethylene ether and / or fatty alcohol polyoxyethylene ether.

[0025] The third aspect of the present invention provides a method for preparing the disperse dye product, comprising mixing dye A, dye B and dye C according to a proportion, adding a dispersant and water, and grinding to obtain the disperse dye product.

[0026] Furthermore, the particle size of the particles obtained after the grinding is 0.1 μm-10 μm, preferably 0.8 μm-1.2 μm.

[0027] Preferably, the preparation method further comprises a drying process after grinding.

[0028] Preferably, the drying comprises spray drying.

[0029] The fourth aspect of the present invention provides the use of the disperse dye product in dyeing polylactic acid fiber and its blended fiber products.

[0030] Furthermore, the dyeing method includes an exhaust dyeing method or a HT method.

[0031] Preferably, the dyeing temperature of the exhaust dyeing method is 80° C.-120° C., and the dyeing time is 20 min-90 min.

[0032] Preferably, the dyeing temperature of the HT method is 90°C-120°C.

[0033] Compared with the prior art, the present invention has at least the following beneficial effects:

[0034] The present invention provides a navy blue to black disperse dye composition suitable for dyeing polylactic acid fibers. After dyeing the polylactic acid fibers, the fibers exhibit a navy blue to black color. The composition exhibits not only a high depth of dyeing but also excellent wash resistance, perspiration resistance, sunlight resistance, and sublimation color fastness. The composition exhibits comprehensive dyeing performance and is economical and environmentally friendly. The present invention provides a navy blue to black disperse dye composition that eliminates the need to develop new disperse dyes for polylactic acid fibers. By using dyes A, B, and C in synergy, excellent dyeing effects can be achieved, saving R&D costs and making the process more economical and convenient.

[0035] The disperse dye product provided by the present invention, in view of the advantages of the above-mentioned navy blue to black disperse dye composition, enables the disperse dye product prepared therefrom to have a wider range of applications, thereby promoting the development of downstream industries.

[0036] The preparation method provided by the invention has simple process, high degree of automation, large processing capacity and is suitable for large-scale industrial production.

[0037] The application provided by the present invention provides disperse dye products with better performance for polylactic acid fibers and blended fiber products thereof, thereby improving dyeing quality, reducing waste rate, and lowering fabric production costs. DETAILED DESCRIPTION

[0038] The embodiments of the present invention will be described in detail below in conjunction with the embodiments and examples, but those skilled in the art will understand that the following embodiments and examples are only used to illustrate the present invention and should not be regarded as limiting the scope of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative work are within the scope of protection of the present invention.

[0039] The first aspect of the present invention provides a navy to black disperse dye composition comprising at least one dye A having a structure as shown in formula I, at least one dye B having a structure as shown in formula II, and at least one dye C having a structure as shown in formula III;

[0040]

[0041] In formula I, R1 is methyl, ethyl or isopropoxypropyl;

[0042]

[0043] In formula II, R2 is methyl or hydrogen; R3 is methyl, ethyl or propyl; R4 is methylene or ethylene; R5 is methyl or ethyl;

[0044]

[0045] In formula III, R6 is methyl or hydrogen; R7 is methyl, ethyl or propyl; R8 is methylene or ethylene; R9 is methyl or ethyl.

[0046] The navy blue to black disperse dye composition provided by the present invention is suitable for dyeing polylactic acid fibers. After dyeing the polylactic acid fibers, the fibers exhibit navy blue to black colors. The dyeing depth is high, and the dyeing has excellent water resistance, perspiration resistance, sunlight resistance, and sublimation color fastness. The dyeing performance is comprehensive, and the product is economical and environmentally friendly.

[0047] The synergistic combination of dye A, dye B and dye C makes the navy to black disperse dye composition more suitable for diffusion in the polylactic acid fiber, resulting in better dyeing effect and comprehensive performance.

[0048] In the specific implementation process, the structural formula of dye A includes:

[0049]

[0050]

[0051] At least one of the above formula I-1, formula I-2 and formula I-3. In the specific implementation process, the structural formula of dye B includes:

[0052]

[0053]

[0054] The dye B is selected from at least one of the above formula II-1, formula II-2, formula II-3 and formula II-4.

[0055] In the specific implementation process, the structural formula of dye C includes:

[0056]

[0057] The dye C is selected from at least one of the above formula III-1, formula III-2, formula III-3 and formula III-4.

[0058] Furthermore, in the navy blue to black disperse dye composition, the dye A accounts for 30 wt.%-60 wt.%, the dye B accounts for 1 wt.%-20 wt.%, and the dye C accounts for 30 wt.%-70 wt.%.

[0059] Typically but not limitatively, the proportion of dye A can be, for example, 30wt.%, 35wt.%, 40wt.%, 45wt.%, 50wt.%, 55wt.% or 60wt.%, or any value within the range of 30wt.%-60wt.%; the proportion of dye B can be, for example, 1wt.%, 5wt.%, 10wt.%, 15wt.% or 20wt.%, or any value within the range of 1wt.%-20wt.%; the proportion of dye C can be, for example, 30wt.%, 35wt.%, 40wt.%, 45wt.%, 50wt.%, 55wt.%, 60wt.%, 65wt.% or 70wt.%, or any value within the range of 30wt.%-70wt.%.

[0060] Furthermore, in the navy blue to black disperse dye composition, the dye A accounts for 35 wt.%-55 wt.%, the dye B accounts for 1 wt.%-10 wt.%, and the dye C accounts for 40 wt.%-60 wt.%.

[0061] In a preferred embodiment of the present invention, the proportion of dye A can be, for example, 35wt.%, 40wt.%, 45wt.%, 50wt.% or 55wt.%, or any value within the range of 35wt.%-55wt.%; the proportion of dye B can be, for example, 1wt.%, 5wt.% or 10wt.%, or any value within the range of 1wt.%-10wt.%; the proportion of dye C can be, for example, 40wt.%, 45wt.%, 50wt.%, 55wt.% or 60wt.%, or any value within the range of 40wt.%-60wt.%.

[0062] The second aspect of the present invention provides a disperse dye product, comprising a dispersant and the navy to black disperse dye composition.

[0063] The disperse dye product provided by the present invention, in view of the advantages of the above-mentioned navy blue to black disperse dye composition, enables the disperse dye product prepared therefrom to have a wider range of applications, thereby promoting the development of downstream industries.

[0064] Furthermore, in the disperse dye product, the navy to black disperse dye composition accounts for 10 wt.% to 50 wt.%, and the remainder is a dispersant.

[0065] Typically, but not limited to, in a disperse dye product, the proportion of the navy to black disperse dye composition can be, for example, 10 wt.%, 20 wt.%, 30 wt.%, 40 wt.%, or 50 wt.%, or any value within the range of 10 wt.% to 50 wt.%. "The balance" refers to the difference between the total proportion of other substances in the disperse dye product, excluding the dispersant, and 100%.

[0066] In one embodiment of the present invention, when the disperse dye product is in a solid state, it is composed of a navy to black disperse dye composition and a dispersant, and the sum of the weight proportions of the two is 100%.

[0067] In another embodiment of the present invention, when the disperse dye product is in liquid state, it is composed of a navy to black disperse dye composition, water and a dispersant, and the sum of the weight proportions of the three is 100%.

[0068] Furthermore, in the disperse dye product, the dispersant includes an anionic dispersant and / or a nonionic dispersant.

[0069] Preferably, the anionic dispersant includes at least one of naphthalenesulfonic acid formaldehyde condensate, alkylnaphthalenesulfonic acid formaldehyde condensate, benzylnaphthalenesulfonic acid formaldehyde condensate and lignin sulfonate.

[0070] Specific dispersant brands for naphthalenesulfonic acid formaldehyde condensate include dispersant NNO; specific dispersant brands for alkylnaphthalenesulfonic acid formaldehyde condensate include dispersant MF; specific dispersant brands for benzylnaphthalenesulfonic acid formaldehyde condensate include dispersant CNF.

[0071] Preferably, the nonionic dispersant includes alkylphenol polyoxyethylene ether and / or fatty alcohol polyoxyethylene ether.

[0072] The third aspect of the present invention provides a method for preparing the disperse dye product, comprising mixing dye A, dye B and dye C according to a proportion, adding a dispersant and water, and grinding to obtain the disperse dye product.

[0073] The preparation method provided by the invention has simple process, high degree of automation, large processing capacity and is suitable for large-scale industrial production.

[0074] In the specific grinding process, the grinding equipment can be selected from ball mill, sand mill or vibration mill.

[0075] Furthermore, the particle size of the particles obtained after the grinding is 0.1 μm-10 μm, preferably 0.8 μm-1.2 μm.

[0076] When the particle size is 0.1 μm to 10 μm, disperse dyes can improve dyeing uniformity and color burst. Typical, but not limiting, particle sizes obtained after grinding can be, for example, 0.1 μm, 0.5 μm, 0.8 μm, 1 μm, 1.2 μm, 2 μm, 3 μm, 4 μm, 5 μm, 6 μm, 7 μm, 8 μm, 9 μm, or 10 μm, or any value within the range of 0.1 μm to 10 μm. A particle size of 0.8 μm to 1.2 μm offers a good balance between dyeing quality and production cost.

[0077] Preferably, when the disperse dye preparation is in a solid state, the preparation method further comprises a drying process after grinding.

[0078] Preferably, the drying comprises spray drying.

[0079] The fourth aspect of the present invention provides the use of the disperse dye product in dyeing polylactic acid fiber and its blended fiber products.

[0080] The application provided by the present invention provides disperse dye products with better performance for polylactic acid fibers and blended fiber products thereof, thereby improving dyeing quality, reducing waste rate, and lowering fabric production costs.

[0081] Furthermore, the dyeing method includes an exhaust dyeing method or a HT method.

[0082] Preferably, the dyeing temperature of the exhaust dyeing method is 80° C.-120° C., and the dyeing time is 20 min-90 min.

[0083] Preferably, the dyeing temperature of the HT method is 90°C-120°C.

[0084] The present invention is further illustrated below by specific examples and comparative examples. However, it should be understood that these examples are merely for the purpose of further explanation and should not be construed as limiting the present invention in any form. The raw materials used in the examples and comparative examples of the present invention, unless otherwise specified, were prepared under conventional conditions or conditions recommended by the manufacturer. Reagents or instruments used without manufacturer's indication are all commercially available conventional products.

[0085] Example 1

[0086] This embodiment provides a navy to black disperse dye product, and the specific preparation method is as follows:

[0087] 40 g of dye A of formula I-1, 4 g of dye B of formula II-1, 56 g of dye C of formula III-1, 160 g of dispersant MF (methylnaphthalenesulfonic acid formaldehyde condensate), and 40 g of sodium ligninsulfonate were ground together in a sand mill with 450 mL of water for 3-5 hours, and then spray-dried (air inlet 130-135°C, air outlet 60-75°C). Approximately 300 g of the finished dye was obtained.

[0088] Example 2-11

[0089] These examples provide different disperse dye products ranging from navy blue to black, using dyes A, B, and C with different structures, and prepared according to the preparation method shown in Example 1. The specific raw materials used and the amounts used are shown in Table 1 below.

[0090] Table 1

[0091]

[0092] “ / ” means that the dispersant was not added.

[0093] Comparative Example 1

[0094] This comparative example provides a black disperse dye, which is a commercially available product produced by Shanghai Anoky Group Co., Ltd.: Anoklon Black ABO 300%.

[0095] Comparative Example 2

[0096] This comparative example provides a navy blue disperse dye, which is a commercially available product produced by Shanghai Anoky Group Co., Ltd.: Anoklon Navy Blue EXN-SF 300%.

[0097] Test example

[0098] 5g of each disperse dye product from the Examples and Comparative Examples was dispersed in 500mL of water. 20mL was then drawn off and mixed with 80mL of water. The dye bath was adjusted to a pH of 4-5 with acetic acid. The temperature was raised to 70°C, and 5g of polylactic acid fiber cloth was added for dyeing. The temperature was raised from 70°C to 110°C over 30 minutes, held for 50 minutes, cooled to below 90°C, and then drained for washing. The cloth sample was then placed in 100mL of a reduction cleaning solution containing 1g / L caustic soda and 1g / L hydrosulfite for reduction cleaning at 60°C for 20 minutes. Finally, the sample was acid-washed, rinsed with water, and dried.

[0099] The dyed fabric samples were tested for their color fastness to washing, perspiration, sunlight, and sublimation according to ISO 105C10 C(3), ISO 105E04, ISO 105B02, and GB / T5718-1997. The test results are shown in Table 2.

[0100] Table 2

[0101]

[0102] As can be seen from the table above, the navy blue to black disperse dye composition of the present invention dyes polylactic acid fibers to a navy blue to black color, and exhibits excellent wash resistance, perspiration resistance, sunlight resistance, and sublimation fastness, demonstrating comprehensive dyeing performance. In contrast, the dyes of Comparative Examples 1-2 do not color polylactic acid fibers under the same dyeing conditions and cannot be used for dyeing polylactic acid fibers.

[0103] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A navy to black disperse dye composition, characterized in that It comprises at least one dye A with a structure as shown in formula I, at least one dye B with a structure as shown in formula II, and at least one dye C with a structure as shown in formula III; Formula I In formula I, R1 is methyl, ethyl or isopropoxypropyl; Formula II In formula II, R2 is methyl or hydrogen; R3 is methyl, ethyl or propyl; R4 is methylene or ethylene; R5 is methyl or ethyl; Formula III In formula III, R6 is methyl or hydrogen; R7 is methyl, ethyl or propyl; R8 is methylene or ethylene; R9 is methyl or ethyl.

2. The navy blue to black disperse dye composition according to claim 1, wherein The proportion of dye A is 35wt.%-55wt.%, the proportion of dye B is 1wt.%-10wt.%, and the proportion of dye C is 40wt.%-60wt.%.

3. A disperse dye product, characterized in that: The invention comprises a dispersant and the navy to black disperse dye composition according to claim 1 or 2.

4. The disperse dye product according to claim 3, wherein The navy to black disperse dye composition accounts for 10wt.%-50wt.%, and the balance is dispersant.

5. The disperse dye product according to claim 3, wherein The dispersant includes anionic dispersants and / or nonionic dispersants.

6. The disperse dye product according to claim 5, characterized in that The anionic dispersant includes at least one of naphthalenesulfonic acid formaldehyde condensate, alkylnaphthalenesulfonic acid formaldehyde condensate, benzylnaphthalenesulfonic acid formaldehyde condensate and lignin sulfonate.

7. The disperse dye product according to claim 5, characterized in that The nonionic dispersant includes alkylphenol polyoxyethylene ether and / or fatty alcohol polyoxyethylene ether.

8. A method for preparing the disperse dye product according to any one of claims 3 to 7, characterized in that: Dye A, dye B and dye C are mixed according to a proportion, and a dispersant and water are added and ground to obtain the disperse dye product.

9. The preparation method according to claim 8, characterized in that The particle size of the particles obtained after the grinding is 0.1 μm-10 μm.

10. The preparation method according to claim 8, characterized in that The particle size of the particles obtained after the grinding is 0.8 μm-1.2 μm.

11. The preparation method according to claim 8, characterized in that The preparation method further comprises a drying process after grinding.

12. The preparation method according to claim 11, characterized in that The drying includes spray drying.

13. Use of the disperse dye product according to any one of claims 3 to 7 in dyeing polylactic acid fiber and its blended fiber products.

14. The use according to claim 13, characterized in that The dyeing method includes exhaust dyeing or HT dyeing.

15. The use according to claim 14, characterized in that The dyeing temperature of the exhaust dyeing method is 80° C.-120° C., and the dyeing time is 20 min-90 min.

16. The use according to claim 14, characterized in that The dyeing temperature of the HT method is 90°C-120°C.

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