Disperse dye blue color paste and preparation method thereof

Abstract

The invention relates to disperse dye blue color paste and a preparation method thereof. The disperse dye blue color paste comprises the following components in parts by weight: 20-30 parts of disperse dye blue powder, 15-25 parts of a polymeric dispersant, 10-20 parts of a wetting agent, 15-20 parts of glycerol, 0.1-0.3 part of a bactericide and the balance of deionized water. The preparation method comprises the following steps: preparing the polymeric dispersant for later use; adding deionized water into a reaction kettle, sequentially adding glycerol, a polymeric dispersant, a wetting agent, a sterilizing agent and disperse dye blue powder while stirring, uniformly mixing, putting into a sand mill, grinding at 2000rpm, testing the particle size, and discharging and filtering after the particle size is smaller than 300nm to obtain the disperse dye blue color paste. The disperse dye blue color paste prepared by the invention has the advantages of high fluency, high stability, no agglomeration, continuous output without blocking, low production cost and long shelf life.

Description

Technical Field

[0001] The present invention relates to the field of ink paste for printers, in particular to a disperse dye blue paste for digital printing and a preparation method thereof. Background Art

[0002] Disperse dye inks are used in digital inkjet printing, and have the characteristics of bright colors and simple post-coloring process. Most of the disperse dye inks on the market are made of ultra-fine color pastes imported from abroad (such as those produced by BASF and Ciba) and then prepared by post-formulation. Domestic color pastes cannot meet the standards of similar foreign products in terms of ink stability, and are prone to agglomeration and precipitation, which in turn affects the application of digital inkjet printing. However, foreign imports are expensive and have high production costs, so it is difficult to meet the requirements of consumers. Although the Chinese patent with patent application number 201611064697.4 discloses an ultra-fine disperse dye blue color paste and its preparation method, which solves the above-mentioned problems existing in existing domestic color pastes to a certain extent, it still has problems such as high production cost, poor color paste fluidity, and the ink is prone to mold and deterioration over time. Summary of the invention

[0003] The object of the present invention is to provide a disperse dye blue color paste and a preparation method thereof with high fluency and high stability, no agglomeration, continuous output without clogging, low production cost and long shelf life in view of the above-mentioned problems and shortcomings.

[0004] The technical solution of the present invention is achieved in this way:

[0005] The disperse dye blue color paste of the present invention comprises the following components in weight ratio:

[0006]

[0007]

[0008] Deionized water removes ionic impurities in water, making the water purer and helping to improve the stability of the color paste. In addition, non-ionic surfactants can be added to the above-mentioned components as needed.

[0009] The synthetic material of the polymer dispersant includes the following components: sodium lignin sulfonate, ethylene glycol, glycerol, diethylene glycol, monoethanolamine, methyl ether, butanone and deionized water. The weight ratio of the components is: sodium lignin sulfonate 15%-25%, ethylene glycol 2%-10%, glycerol 5%-15%, diethylene glycol 2%-8%, monoethanolamine 5%-7%, methyl ether 2%-5%, butanone 5%-8%, and the balance is deionized water. Sodium lignin sulfonate can be NP-6, NP-10 or TX-4.

[0010] Furthermore, the synthetic material of the polymer dispersant also includes one or a combination of triethylene glycol, propylene glycol, butylene glycol, diethylene glycol, diethylene glycol, polypropylene glycol, and polyethylene glycol.

[0011] The wetting agent is one or more of ethanol, glycerol, n-propanol, ethylene glycol, diethylene glycol, polyethylene glycol, triethylene glycol, propylene glycol, and polypropylene glycol. The wetting agent is used to moisturize the color paste. During the storage and use of the color paste, it is prevented from drying in the air and the color powder is precipitated, and the color paste is kept in a moisturizing state. In addition, the color paste can be more lubricated and smooth during grinding.

[0012] The method for preparing the disperse dye blue color paste of the present invention comprises the following steps:

[0013] (1) First prepare a polymer dispersant for use;

[0014] (ii) Add deionized water to the reaction kettle, then add glycerin, polymer dispersant, wetting agent, bactericide, disperse dye blue powder in sequence while stirring, mix well, put into a sand mill at 2000rpm, test the particle size, and after reaching a particle size of less than 300 nanometers, discharge and filter to obtain disperse dye blue color paste. It is further preferred that the particle size is controlled below 200 nanometers, so that the color paste is more delicate, the performance is more stable, the fluency is better, and it is less likely to be blocked during long-term printing.

[0015] The preparation method of the above-mentioned polymer dispersant is: add components such as sodium lignin sulfonate, monoethanolamine, ethylene glycol, glycerol, diethylene glycol, methyl ether, butanone, triethylene glycol, propylene glycol, butylene glycol, diethylene glycol, diethylene glycol, polypropylene glycol, polyethylene glycol and deionized water into a reactor in a certain proportion, set the speed at 600-800r / min, stir evenly to form a polymer mixture, and then transfer the polymer mixture to a high-speed spiral emulsifier for water-based pigment paste (also called a high-speed spiral emulsifier for water-based pigment paste), set the speed at 3500r / min, emulsify for 1-3 hours, and finally obtain a light yellow polymer dispersant.

[0016] The role of glycerol in the present invention, in addition to the moistening effect, can also increase the viscosity because glycerol is relatively thick.

[0017] The polymer dispersant in the present invention can shorten the grinding time of the color paste, make the color paste more fluent, and not easily blocked. The sodium lignin sulfonate in the polymer dispersant has a hydrophilic group, which is used to improve the wettability and stability of the disperse dye, and can effectively wet and wrap the color powder particles during the grinding process of the color paste, so that the color powder particles are evenly and stably distributed in the disperse dye blue color paste.

[0018] The fungicide in the present invention is preferably an existing special color paste fungicide (also called color paste antibacterial agent). The function of adding the fungicide is: since the color paste contains water, adding the fungicide can sterilize and prevent mold and deterioration to ensure product quality.

[0019] The color paste prepared by the present invention has the characteristics of small ink particle size (less than 0.2 microns, i.e. 200 nanometers), high fluency, and strong stability. The ink configured by the present invention has good printing stability, can continuously print 100 square meters without clogging, without breaking the line, good printing fluency, and fine image quality. In addition, the present invention adds a bactericide to the color paste, so it can effectively prevent mold and deterioration, ensuring product quality.

[0020] The blue color paste in the present invention is mainly used for digital printing of pattern LOGO on clothes, jerseys, advertising banners, etc. DETAILED DESCRIPTION

[0021] The disperse dye blue color paste of the present invention comprises the following components in weight ratio:

[0022]

[0023] The synthetic material of the polymer dispersant includes the following components in weight ratio: sodium lignin sulfonate, ethylene glycol, glycerol, diethylene glycol, monoethanolamine, methyl ether, butanone and deionized water.

[0025] Furthermore, the synthetic material of the polymer dispersant also includes one or a combination of triethylene glycol, propylene glycol, butylene glycol, diethylene glycol, diethylene glycol, polypropylene glycol, and polyethylene glycol.

[0026] The wetting agent is two or more of ethanol, glycerol, n-propanol, ethylene glycol, diethylene glycol, polyethylene glycol, triethylene glycol, propylene glycol, and polypropylene glycol.

[0027] The preferred ratio of the disperse dye blue paste is:

[0028]

[0029]

[0030] The method for preparing the disperse dye blue color paste of the present invention comprises the following steps:

[0031] (1) First prepare a polymer dispersant for use;

[0032] (ii) Add deionized water to the reaction kettle, then add glycerin, polymer dispersant, wetting agent, bactericide, disperse dye blue powder in sequence while stirring, mix well, put into a sand mill and grind at 2000 rpm, test the particle size, and when the particle size reaches less than 300 nanometers, discharge the material, filter, and obtain disperse dye blue color paste.

[0033] The preparation method of the polymer dispersant is as follows: sodium lignin sulfonate, monoethanolamine, ethylene glycol, glycerol, diethylene glycol, methyl ether, butanone, triethylene glycol, propylene glycol, butylene glycol, diethylene glycol, diethylene glycol, polypropylene glycol, polyethylene glycol and deionized water are added into a reaction kettle in a certain proportion, the rotation speed is set at 600-800 r / min, and after stirring for 60 minutes, a polymer mixture is formed, and then the polymer mixture is transferred to a high-speed spiral emulsifier for water-based pigment color paste, the rotation speed is set at 3500 r / min, and emulsification is performed for 2 hours to finally obtain a light yellow polymer dispersant.

[0034] Embodiment 1: disperse dye blue color paste, the weight ratio of each component thereof is:

[0035]

[0036]

[0037] The fungicide used is DK-231 color paste preservative sold by Foshan Lanfeng Additive Co., Ltd. This is a new generation of water-based environmentally friendly zero-VOC broad-spectrum fungicide preservative, which is compounded by fast-acting and long-acting fungicides and does not contain any metal ions, volatile solvents, formaldehyde and other highly toxic ingredients. The wetting agent uses ethanol, glycerol and n-propanol.

[0038] The polymer dispersant is formed by the following components in weight ratio: 20% of sodium lignin sulfonate, 5% of ethylene glycol, 10% of glycerol, 5% of diethylene glycol, 7% of monoethanolamine, 5% of methyl ether, 8% of butanone and 40% of deionized water.

[0039] First, prepare the polymer dispersant: add sodium lignin sulfonate, monoethanolamine, ethylene glycol, glycerol, diethylene glycol, methyl ether, butanone and deionized water into the reactor in the above proportions, set the speed at 600 r / min, stir for 60 minutes to form a polymer mixture, then transfer the polymer mixture to a water-based pigment paste high-speed spiral emulsifier, set the speed at 3500 r / min, emulsify for 2 hours, and finally obtain a light yellow polymer dispersant.

[0040] Preparation of disperse dye blue paste: add deionized water according to the weight ratio into another reaction kettle, and then add glycerin, polymer dispersant, wetting agent, bactericide and disperse dye blue powder according to the above ratio in sequence while stirring. After mixing evenly, put it into a sand mill and grind it at 2000 rpm. Test the particle size. When the particle size reaches less than 200 nanometers, discharge the material and filter it with a glass fiber filter element (0.2um filter membrane) to remove colloids and large-sized particles to obtain an ultrafine and dispersed and stable disperse dye blue paste.

[0041] Embodiment 2: Disperse dye blue paste, comprising the following components in weight ratio:

[0042]

[0043]

[0044] The polymer dispersant is formed by the following components in weight ratio: 23% sodium lignin sulfonate, 5% ethylene glycol, 8% glycerol, 2% diethylene glycol, 6% monoethanolamine, 5% diethylene glycol, 5% polypropylene glycol, 2% methyl ether, 5% butanone, and the balance is deionized water.

[0045] The preparation method of the polymer dispersant is as follows: sodium lignin sulfonate, monoethanolamine, ethylene glycol, glycerol, diethylene glycol, diethylene glycol, polypropylene glycol, methyl ether, butanone and deionized water are added into a reactor in a certain proportion, the rotation speed is set at 600-800 r / min, and after stirring for 60 minutes, a polymer mixed liquid is formed, and then the polymer mixed liquid is transferred to a high-speed spiral emulsifier for water-based pigment color paste, the rotation speed is set at 3500 r / min, and emulsification is performed for 2 hours to finally obtain a light yellow polymer dispersant.

[0046] Preparation of disperse dye blue paste: add deionized water according to the weight ratio into another reaction kettle, and then add glycerin, polymer dispersant, wetting agent, bactericide and disperse dye blue powder according to the above ratio in sequence while stirring. After mixing evenly, put it into a sand mill and grind it at 2000 rpm. Test the particle size. After reaching the required particle size of less than 250 nanometers, discharge the material and filter it with a glass fiber filter element (0.25um filter membrane) to obtain an ultrafine and dispersed and stable disperse dye blue paste.

[0047] Product effect test:

[0048] 1. Take the color pastes prepared in Examples 1 to 2 respectively, store them at 60°C for 7 days, and then perform filtration tests using a filtration device with a glass fiber filter element (0.3um filter membrane). The results show that both color pastes can basically pass through the filter membrane, which indicates that the color pastes have good stability and fluidity, and continuous printing is not prone to clogging and disconnection.

[0049] 2. The color pastes prepared in Examples 1 to 2 were respectively taken and digital printing tests were performed using two Epson inkjet printers. 100 square meters were printed continuously. The results showed that there was no clogging or breakage, the printing was smooth, and the image quality was fine.

[0050] Although the present invention is described with reference to specific embodiments, such description is not intended to limit the present invention. With reference to the description of the present invention, other changes of the disclosed embodiments are predictable to those skilled in the art, and such changes should fall within the scope defined by the claims.

Claims

1. A disperse dye blue paste, characterized in that The composition includes the following weight ratios: The balance is deionized water; Wherein, the synthetic material of the polymer dispersant includes the following components: Sodium lignin sulfonate, ethylene glycol, glycerol, diethylene glycol, monoethanolamine, methyl ether, butanone and deionized water.

2. The disperse dye blue paste according to claim 1, characterized in that: The weight ratio of polymer dispersant is: Sodium lignin sulfonate 15%-25%, ethylene glycol 2%-10%, glycerol 5%-15%, diethylene glycol 2%-8%, monoethanolamine 5%-7%, methyl ether 2%-5%, butanone 5%-8%, and the balance is deionized water.

3. The disperse dye blue paste according to claim 1 or 2, characterized in that: The synthetic material of the polymer dispersant also includes one or a combination of triethylene glycol, propylene glycol, butylene glycol, diethylene glycol, diethylene glycol, polypropylene glycol, and polyethylene glycol.

4. The disperse dye blue paste according to claim 1, characterized in that: The wetting agent is two or more of ethanol, glycerol, n-propanol, ethylene glycol, diethylene glycol, polyethylene glycol, triethylene glycol, propylene glycol, and polypropylene glycol.

5. A method for preparing the disperse dye blue paste according to any one of claims 1 to 4, characterized in that The following steps are involved: (1) First prepare a polymer dispersant for use; (ii) Add deionized water to the reaction kettle, then add glycerin, polymer dispersant, wetting agent, bactericide, disperse dye blue powder in sequence while stirring, mix well, put into a sand mill and grind at 2000 rpm, test the particle size, and when the particle size reaches less than 300 nanometers, discharge the material, filter, and obtain disperse dye blue color paste.

6. The method for preparing the disperse dye blue paste according to claim 5, characterized in that: The preparation method of the polymer dispersant is: Adding components such as sodium lignin sulfonate, monoethanolamine, ethylene glycol, glycerol, methyl ether, butanone and deionized water into a reactor in a certain proportion; or adding components such as sodium lignin sulfonate, monoethanolamine, ethylene glycol, glycerol, methyl ether, butanone and one or more of diethylene glycol, triethylene glycol, propylene glycol, butylene glycol, glycol ether, glycol ether, polypropylene glycol, polyethylene glycol and deionized water into a reactor in a certain proportion; setting the rotation speed at 600-800 r / min, stirring evenly to form a polymer mixed liquid, and then transferring the polymer mixed liquid to a high-speed spiral emulsifier for water-based pigment color paste, setting the rotation speed at 3500 r / min, emulsifying for 1-3 hours, and finally obtaining a light yellow polymer dispersant.

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