High-fastness disperse blue dye as well as preparation method and application thereof

Abstract

The invention discloses a high-fastness disperse blue dye as well as a preparation method and application thereof, and belongs to the technical field of disperse dyes. The dye comprises the following raw materials in parts by weight: 45-50 parts of a component A, 0-18 parts of a component B and 46-62 parts of an auxiliary agent. The general formula of the component A is the general formula of the component B. The preparation method comprises the following steps: (1) weighing the raw materials; and (2) uniformly mixing to obtain a finished product. The high-fastness disperse blue dye disclosed by the invention has excellent wet treatment fastness such as washing resistance and perspiration resistance and high sublimation fastness, overcomes the defect of the existing dye in fastness performance, complements and perfects the chromatography of the high-fastness disperse blue dye, especially fills the blank of no high-sublimation-fastness sapphire blue and brilliant blue series in printing and pad dyeing processes, and has the advantages of high fastness, high fastness, high fastness and the like. The use requirements of various high-end textiles under different dyeing processes can be met.

Description

Technical Field

[0001] This invention relates to the field of disperse dye technology, and more specifically to a high-fastness disperse blue dye, its preparation method, and its application. Background Technology

[0002] Disperse dyes are a class of dyes with relatively small molecules and no water-soluble groups in their structure. They are uniformly dispersed in dye baths with the help of dispersing agents for dyeing. They can dye polyester fibers, acetate fibers, and polyamide fibers, making them a dedicated dye for polyester. Disperse dyes can be broadly classified into disperse orange, disperse blue, disperse yellow, and disperse red. Several different disperse dyes can be mixed in certain proportions to obtain disperse black, disperse green, disperse violet, and other disperse dyes. Among them, brilliant blue and royal blue are indispensable colors in a complete color system. Brilliant blue and royal blue types of disperse dyes include well-known examples such as Disperse Blue 56, Disperse Blue 183, and Disperse Blue 366. These disperse blue dyes have poor wash fastness and sublimation fastness. Under the high-temperature environment of the dyeing and finishing process, the dye is prone to migration or sublimation, causing problems such as unstable color and decreased color fastness, which greatly limits their application range and prevents textiles dyed from meeting high-performance requirements.

[0003] High-fastness disperse blue dyes are a key technological requirement in the textile printing and dyeing industry, especially in the dyeing of polyester fibers and their blended fabrics. However, traditional disperse dyes often face problems such as insufficient color fastness, easy staining, and color spots during the dyeing process.

[0004] Therefore, how to develop a blue disperse dye with excellent water resistance, perspiration resistance, and high sublimation is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a high-fastness disperse blue dye, its preparation method and application, so as to overcome the shortcomings of the prior art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A high-fastness disperse blue dye comprises the following raw materials in parts by weight: component A 45-50 parts, component B 0-18 parts, and auxiliaries 46-62 parts;

[0008] The general formula of component A is Wherein, R1 is selected from C1-C4 alkyl or C1-C4 amide, and R2 is selected from C1-C4 alkyl or benzyl;

[0009] The general formula of component B is

[0010] The technological breakthrough of this invention mainly focuses on the molecular structure design of component A. By introducing special groups into the dye molecular structure, increasing the conjugated system of the molecule, and introducing strong polar groups, the interaction force between the dye and the fiber is enhanced, thereby improving the color fastness.

[0011] This invention introduces two cyano groups into the structure of the diazo component:

[0012] 1. Enhance the molecular conjugation system and regulate the electron cloud distribution, while improving the chemical stability of the dye: The cyano group is a strong electron-withdrawing group, which can efficiently pull electrons from the molecule through the diazo structure (-N=N-), prolonging the π-conjugation system, making it easier for the dye to achieve a dark color and a higher color intensity. Increasing the number of electron-withdrawing groups in the structure can improve the dye's lifting power and color depth.

[0013] 2. Improved chemical stability: The introduction of cyano groups can reduce the electron cloud density of diazo bonds (-N=N-), reducing the risk of decomposition under the action of light, heat or chemical reagents (such as acids and alkalis), avoiding dye fading or structural damage, thereby improving the color fastness and chemical stability of dyes.

[0014] This invention introduces a benzyl group into the coupling portion of dye synthesis:

[0015] 1. Optimize steric hindrance and molecular stacking: The benzyl benzene ring structure generates steric hindrance, which can inhibit excessive aggregation between dye molecules and avoid problems such as uneven color or reduced depth during dyeing.

[0016] 2. Adjusting polarity and dyeing affinity: Benzyl is a weakly polar group that can balance the polarity of the coupling components, making it easier for dyes to bind with non-polar or weakly polar fibers (such as polyester and nylon), thereby improving dyeing adhesion.

[0017] 3. The steric hindrance of the benzyl group can slightly change the planarity of the molecular conjugated system, which may cause a slight shift in the maximum absorption wavelength of the dye (usually a slight adjustment in light-colored light), but because it inhibits aggregation, it can improve the brightness of the color after dyeing.

[0018] 4. Benzyl enhances the hydrophobic bonding force between dyes and fibers, reduces shedding during washing, inhibits dye molecule aggregation, makes its adhesion on the fiber surface more uniform, and reduces fading due to friction.

[0019] In summary, the high-fastness disperse blue dye of this invention has excellent wet treatment fastness such as water washing and perspiration fastness, as well as high sublimation fastness, which solves the shortcomings of existing dyes in terms of fastness performance, supplements and improves the color spectrum of high-fastness disperse dyes, and in particular fills the gap in printing and pad dyeing processes where there are no high-sublimation fastness royal blue and bright blue series, which can meet the usage needs of various high-end textiles under different dyeing processes.

[0020] Furthermore, the above component A is At least one of them.

[0021] Furthermore, the aforementioned additive is at least one of dispersants, diffusion agents, and surfactants.

[0022] Furthermore, the aforementioned additives are at least one or more of the following: naphthalene sulfonic acid formaldehyde condensate (dispersant NNO), methyl naphthalene sulfonic acid formaldehyde condensate (dispersant MF), alkyl naphthalene sulfonic acid formaldehyde condensate, benzyl naphthalene sulfonic acid formaldehyde condensate (dispersant CNF), and lignin sulfonates (lignin S-29, 85A).

[0023] A method for preparing a high-fastness disperse blue dye specifically includes the following steps:

[0024] (1) Weigh each raw material according to the above-mentioned high-fastness disperse blue dye parts by weight;

[0025] (2) Mix all raw materials evenly to obtain high fastness disperse blue dye.

[0026] This invention also claims the use of the above-described high-fastness disperse blue dye or the high-fastness disperse blue dye prepared by the above-described method in the processing of pure polyester, polyester-cotton, polyester-ammonia, and polyester-nylon dyeing, padding, and printing.

[0027] As can be seen from the above technical solution, compared with the prior art, the beneficial effects of the present invention are as follows:

[0028] 1. Suitable for dyeing, padding, and printing of pure polyester, polyester-cotton, polyester-ammonia, and polyester-nylon blends.

[0029] 2. Excellent lifting power and good dyeing depth.

[0030] 3. High sublimation fastness, while also ensuring high color fastness to wet treatments such as washing and perspiration.

[0031] 4. It can be used for printing on polyester and polyester-cotton fabrics, and can effectively solve the problems of color bleeding, color mixing, and staining on the white background.

[0032] 5. The color spectrum of high-fastness disperse dyes has been supplemented and improved, especially filling the gap in printing and pad dyeing processes where there are no high-sublimation-fastness royal blue and bright blue series.

[0033] 6. It has good compatibility with the pH and chemicals in the dye bath. Detailed Implementation

[0034] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] Example 1

[0036] High-fastness disperse blue dye, comprising the following raw materials by weight: 50g of NNO dispersant and 60g of other NNO dispersants;

[0037] The preparation method of the above-mentioned high-fastness disperse blue dye specifically includes the following steps:

[0038] (1) Weigh each raw material according to the weight of the high fastness disperse blue dye mentioned above;

[0039] (2) Mix all raw materials evenly to obtain high fastness disperse blue dye.

[0040] Example 2

[0041] High-fastness disperse blue dye, comprising the following raw materials by weight: 50g and dispersant NNO 54g;

[0042] The preparation method of the above-mentioned high-fastness disperse blue dye specifically includes the following steps:

[0043] (1) Weigh each raw material according to the weight of the high fastness disperse blue dye mentioned above;

[0044] (2) Mix all raw materials evenly to obtain high fastness disperse blue dye.

[0045] Example 3

[0046] High-fastness disperse blue dye, comprising the following raw materials by weight: 28g 22g and dispersant NNO 58g;

[0047] The preparation method of the above-mentioned high-fastness disperse blue dye specifically includes the following steps:

[0048] (1) Weigh each raw material according to the weight of the high fastness disperse blue dye mentioned above;

[0049] (2) Mix all raw materials evenly to obtain high fastness disperse blue dye.

[0050] Example 4

[0051] High-fastness disperse blue dye, comprising the following raw materials by weight: 35g 15g and dispersant NNO 56g;

[0052] The preparation method of the above-mentioned high-fastness disperse blue dye specifically includes the following steps:

[0053] (1) Weigh each raw material according to the weight of the high fastness disperse blue dye mentioned above;

[0054] (2) Mix all raw materials evenly to obtain high fastness disperse blue dye.

[0055] Example 5

[0056] High-fastness disperse blue dye, comprising the following raw materials by weight: 32g 18g and dispersant NNO 62g;

[0057] The preparation method of the above-mentioned high-fastness disperse blue dye specifically includes the following steps:

[0058] (1) Weigh each raw material according to the weight of the high fastness disperse blue dye mentioned above;

[0059] (2) Mix all raw materials evenly to obtain high fastness disperse blue dye.

[0060] Example 6

[0061] High-fastness disperse blue dye, comprising the following raw materials by weight: 35g 15g and dispersant NNO 55g;

[0062] The preparation method of the above-mentioned high-fastness disperse blue dye specifically includes the following steps:

[0063] (1) Weigh each raw material according to the weight of the high fastness disperse blue dye mentioned above;

[0064] (2) Mix all raw materials evenly to obtain high fastness disperse blue dye.

[0065] Example 7

[0066] High-fastness disperse blue dye, comprising the following raw materials by weight: 30g 18g and dispersant NNO 62g;

[0067] The preparation method of the above-mentioned high-fastness disperse blue dye specifically includes the following steps:

[0068] (1) Weigh each raw material according to the weight of the high fastness disperse blue dye mentioned above;

[0069] (2) Mix all raw materials evenly to obtain high fastness disperse blue dye.

[0070] Example 8

[0071] High-fastness disperse blue dye, comprising the following raw materials by weight: 40g 10g and dispersant NNO 55g;

[0072] The preparation method of the above-mentioned high-fastness disperse blue dye specifically includes the following steps:

[0073] (1) Weigh each raw material according to the weight of the high fastness disperse blue dye mentioned above;

[0074] (2) Mix all raw materials evenly to obtain high fastness disperse blue dye.

[0075] Example 9

[0076] High-fastness disperse blue dye, comprising the following raw materials by weight: 36g 10g and dispersant NNO 50g;

[0077] The preparation method of the above-mentioned high-fastness disperse blue dye specifically includes the following steps:

[0078] (1) Weigh each raw material according to the weight of the high fastness disperse blue dye mentioned above;

[0079] (2) Mix all raw materials evenly to obtain high fastness disperse blue dye.

[0080] Example 10

[0081] High-fastness disperse blue dye, comprising the following raw materials by weight: 12g 18g 15g and dispersant NNO 46g;

[0082] The preparation method of the above-mentioned high-fastness disperse blue dye specifically includes the following steps:

[0083] (1) Weigh each raw material according to the weight of the high fastness disperse blue dye mentioned above;

[0084] (2) Mix all raw materials evenly to obtain high fastness disperse blue dye.

[0085] Performance testing

[0086] Dyed fabric: 75D pure polyester knitted fabric.

[0087] Enhancement test: The enhancement strength of the high-fastness disperse blue dye samples prepared in Examples 1-10 was evaluated on 75D pure polyester knitted fabric, with a commercially available disperse blue 183 as a comparative example. Dyeing depth test points: 0.1%, 0.2%, 0.5%, 1%, 2%, 3%, 4%. The pH of the dye bath was adjusted to 4.5-5, and dyeing was performed using a high-temperature, high-pressure dyeing method. The fabric surface Integ value was tested.

[0088] Wash fastness: GB / T 3921.3, eqv ISO 105C10;

[0089] Perspiration fastness: GB / T 3922, eqv ISO 105E04;

[0090] Sublimation fastness (180℃*30S): GB / T 5718, eqv ISO 105P01.

[0091] The results are shown in Tables 1 and 2.

[0092] Table 2. Evaluation Test Results of Lifting Force of 75D Pure Polyester Knitwear

[0093]

[0094]

[0095] As shown in Table 1, the dispersion blue dye mixtures in Examples 1-10 have slightly better enhancement power and dyeing depth than the existing blue 183 of the same color system in the comparative example, and can meet the actual use requirements for dispersion blue enhancement power and dyeing depth.

[0096] Table 2. Water washability, perspiration resistance, and sublimation fastness.

[0097]

[0098] As shown in Table 2, the wash fastness, perspiration fastness, and sublimation fastness of the disperse blue dye mixtures in Examples 1-10 are significantly improved compared with the conventional disperse blue 183 in the comparative example, and can be used as a disperse blue with high fastness. Moreover, the excellent sublimation fastness performance not only makes it suitable for scenarios requiring high temperature resistance in immersion dyeing, but also solves the problem of existing bright blue and royal blue not being heat-resistant in pad dyeing and printing where the heat resistance of dyes is even higher.

[0099] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A high-fastness disperse blue dye, characterized in that, The raw materials include the following parts by weight: 45-50 parts of component A, 0-18 parts of component B, and 46-62 parts of additives; The general formula of component A is: Wherein, R1 is selected from C1-C4 alkyl or C1-C4 amide, and R2 is selected from C1-C4 alkyl or benzyl; The general formula of component B is:

2. The high-fastness disperse blue dye according to claim 1, characterized in that, The component A is At least one of them.

3. The high-fastness disperse blue dye according to claim 1, characterized in that, The auxiliary agent is at least one of dispersant, diffuser and surfactant.

4. A high-fastness disperse blue dye according to claim 1 or 3, characterized in that, The additive is at least one or more of naphthalene sulfonic acid formaldehyde condensate, methyl naphthalene sulfonic acid formaldehyde condensate, alkyl naphthalene sulfonic acid formaldehyde condensate, benzyl naphthalene sulfonic acid formaldehyde condensate, and lignin sulfonate.

5. A method for preparing a high-fastness disperse blue dye, characterized in that, Specifically, the following steps are included: (1) Weigh each raw material according to the weight parts of the high fastness disperse blue dye according to any one of claims 1-4; (2) Mix all raw materials evenly to obtain the high fastness disperse blue dye.

6. The use of a high-fastness disperse blue dye as described in any one of claims 1-4 or a high-fastness disperse blue dye prepared by the preparation method as described in claim 5 in the processing of pure polyester, polyester-cotton, polyester-ammonia, and polyester-nylon dyeing, pad dyeing, and printing.

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