Nano water-based pigment color paste as well as preparation method and application thereof

Abstract

The invention belongs to the technical field of nano coatings, and particularly discloses nano water-based pigment color paste as well as a preparation method and application thereof, and the nano water-based pigment color paste comprises the following components in parts by mass: 10-20 parts of pigment, 1-10 parts of a humectant, 5-20 parts of a surfactant, 0-0.5 part of an acid-base regulator, 0.2-0.5 part of a preservative and the balance of deionized water. The pigment ink prepared from the nano water-based pigment color paste solves the problem of incompatibility of color ink and white ink during printing; the problems that pigment ink-jet ink is not smooth, lines are broken, and a printing nozzle is blocked are solved. The problems of ink hanging, ink flowing and ink halo of printing ink due to poor combination of pigment ink-jet ink and a printing film are solved; the particle size of the pigment in the nano water-based pigment color paste prepared by the preparation method disclosed by the invention is 1t; the particle size distribution is very narrow, the storage stability is high, and the generation of a dispersion which returns to coarse and flocculates is avoided.

Description

Technical Field

[0001] The present invention belongs to the technical field of nano coatings, and particularly relates to a nano aqueous pigment paste, a preparation method thereof and an application thereof. Background Art

[0002] Water-based inkjet coatings are gradually replacing existing traditional screen printing textile printing and are widely used in the textile industry because they meet the national green environmental protection requirements. Existing water-based inkjet coatings are mainly divided into water-based dye-type inkjet and water-based pigment-type inkjet coatings. Among them, pigment-type inkjet inks have become the mainstream in the market of water-based inkjet inks due to their excellent chemical stability and light stability. In many application scenarios, whether it is the delicate printing of fashionable clothing or the gorgeous patterns of home textiles, pigment-type inkjet inks can present long-lasting and bright colors with their stable characteristics, meeting consumers' demands for high-quality textiles. However, the main material of pigment-type inkjet inks, nano inkjet aqueous pigment paste, is restricted by formulation technology and production equipment, and the prepared nano pigment paste has problems such as uneven particle size fineness and storage stability, bringing a series of serious consequences to subsequent production and use, such as frequent problems of inkjet ink not flowing smoothly and breaking lines, and even causing the printing nozzles of the equipment to be blocked, ultimately resulting in the scrapping of accessories. This not only seriously affects production efficiency, increases production costs, but also fails to meet the requirements of customers and users.

[0003] Currently, water-based inkjet pigment pastes on the domestic market mainly rely on imports from abroad. This not only keeps the procurement cost high, but also restricts the independent development of domestic textile water-based pigment inkjet coating technology. In view of this, in-depth research on water-based pigment inkjet paste products is of great significance to the development of textile water-based pigment inkjet coating technology. Summary of the Invention

[0004] The purpose of the present invention is to overcome the defects existing in the prior art and provide a nano aqueous pigment paste, a preparation method thereof and an application thereof.

[0005] In order to achieve the above purpose, one of the technical solutions of the present invention is: a nano aqueous pigment paste, the components of which by mass fraction include 10-20 parts of pigment, 1-10 parts of humectant, 5-20 parts of surfactant, 0-0.5 parts of acid-base regulator, 0.2-0.5 parts of preservative, and the balance of deionized water.

[0006] In a preferred embodiment of the present invention, the pigment is selected from inorganic pigments or organic pigments, and is at least one of Pigment White PW6, Pigment Black PB6, Pigment Black PB7, Pigment Blue PB15, Pigment Blue PB15:3, Pigment Blue PB15:4, Pigment Green 7, Pigment Violet PV19, Pigment Red PR122, Pigment Red PR176, Pigment Red PR177, Pigment Yellow PY74, Pigment Red PR254, Pigment Yellow PY138, Pigment Yellow PY155, Pigment Yellow PY150, Pigment Yellow PY180.

[0007] In a preferred embodiment of the present invention, the humectant is at least one of 1,2 - propylene glycol, glycerol, diethylene glycol, diglycol, triethylene glycol, PEG200, PEG300, PEG400, PEG600.

[0008] In a preferred embodiment of the present invention, the surfactant is selected from at least one of Tego 410, Tego 755, Tego760, AEO - 9, Surfynol 465, BYK 190, BYK 9131, BYK 9132, BYK 9151, BYK 9177, fatty alcohol polyoxyethylene ether, Tween T80.

[0009] In a preferred embodiment of the present invention, the preservative is selected from at least one of Bestcide 300, BIT - 20, ProxelGXL, Permachen SL - 5600, Triadine 10, Vinkocide KTL, Triadine 3, EUXYI K100, EUXYLPE9010.

[0010] In a preferred embodiment of the present invention, the acid - base regulator is selected from at least one of ammonia water, AMP - 95, sodium hydroxide, triethylamine.

[0011] To achieve the above - mentioned purpose, the second technical solution of the present invention is: an application of a nano - aqueous pigment color paste in a pigment - type ink - jet ink.

[0012] To achieve the above - mentioned purpose, the third technical solution of the present invention is: a preparation method of a nano - aqueous pigment color paste, comprising the following steps:

[0013] (1) Add the humectant, surfactant, acid - base regulator, and deionized water in sequence and stir and disperse them to obtain a mixed solution 1;

[0014] (2) Add the pigment to the mixed solution 1 obtained in step (1) and continue to stir and disperse to obtain a mixed solution 2;

[0015] (3) Add a preservative to the mixed solution 2 obtained in step (2), and stir and disperse it to obtain a mixed pigment dispersion;

[0016] (4) Feed the mixed pigment dispersion obtained in step (3) into a grinding machine for grinding, and filter after grinding to obtain a nano-aqueous pigment color paste coating.

[0017] In a preferred embodiment of the present invention, the stirring speed in step (1) is 100 - 300 rpm, and the stirring time is 10 - 20 min.

[0018] In a preferred embodiment of the present invention, the stirring speed in step (2) is 600 - 1000 rpm, and the stirring time is 30 - 50 min.

[0019] In a preferred embodiment of the present invention, the stirring speed in step (3) is 200 - 500 rpm, and the stirring time is 15 - 20 min.

[0020] In a preferred embodiment of the present invention, the temperature of the grinding material in the grinding equipment cavity in step (4) is controlled at 0 - 60 °C, and the time is 3 - 6 h.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. The pigment ink made from the nano-aqueous pigment color paste of the present invention solves the problems of unsmooth inkjet ink, broken lines, and clogging of the print head.

[0023] 2. The pigment ink made from the nano-aqueous pigment color paste of the present invention solves the problems of poor bonding between the pigment inkjet ink and the printing film, and hanging ink, flowing ink, and bleeding ink of the printing ink.

[0024] 3. The pigment ink made from the nano-aqueous pigment color paste of the present invention solves the incompatibility problem between the color ink and the white ink during ink printing.

[0025] 4. The pigment particle size in the nano-aqueous pigment color paste prepared by the preparation method of the present invention is <200 nm, the particle size distribution is very narrow, and the storage stability is high, avoiding the generation of a dispersed body with coarsening and flocculation. Description of the Drawings

[0026] Figure 1 It is the particle size distribution diagram of the nano-pigment color paste prepared in Example 1 of the present invention;

[0027] Figure 2 It is the particle size distribution diagram of the nano-pigment color paste prepared in Example 4 of the present invention. Detailed Embodiments

[0028] To make the objectives, technical solutions, and advantages of the present invention clearer and more understandable, the present invention will be described in more detail below in conjunction with the accompanying drawings and specific embodiments. However, the protection scope of the present invention is not limited to these embodiments.

[0029] A nano-aqueous pigment paste, the components of which by mass include 10 - 20 parts of pigment, 1 - 10 parts of humectant, 5 - 20 parts of surfactant, 0 - 0.5 parts of acid-base regulator, 0.2 - 0.5 parts of preservative, and the balance of deionized water.

[0030] The pigment is selected from inorganic pigments or organic pigments, and is at least one of pigment white PW6, pigment black PB6, pigment black PB7, pigment blue PB15, pigment blue PB15:3, pigment blue PB15:4, pigment green 7, pigment purple PV19, pigment red PR122, pigment red PR176, pigment red PR177, pigment yellow PY74, pigment red PR254, pigment yellow PY138, pigment yellow PY155, pigment yellow PY150, pigment yellow PY180.

[0031] The humectant is at least one of 1,2 - propylene glycol, glycerol, diethylene glycol, diglycol, triethylene glycol, PEG200, PEG300, PEG400, PEG600.

[0032] The surfactant is selected from at least one of Tego 410, Tego 755, Tego 760, AEO - 9, Surfynol 465, BYK190, BYK 9131, BYK 9132, BYK 9151, BYK 9177, fatty alcohol polyoxyethylene ether, and Tween T80.

[0033] The preservative is selected from at least one of Bestcide 300, BIT - 20, Proxel GXL, Permachen SL - 5600, Triadine 10, Vinkocide KTL, Triadine 3, EUXYI K100, EUXYLPE 9010.

[0034] The acid-base regulator is selected from at least one of ammonia water, AMP - 95, sodium hydroxide, and triethylamine.

[0035] An application of a nano-aqueous pigment paste in a pigment-based inkjet ink.

[0036] A preparation method of a nano-aqueous pigment paste, comprising the following steps:

[0037] (1) Add the humectant, surfactant, acid-base regulator, and ionic water in sequence and then stir and disperse to obtain mixed solution 1;

[0038] (2) Add pigments to the mixed solution 1 obtained in step (1), and continue stirring and dispersing to obtain mixed solution 2;

[0039] (3) Add preservatives to the mixed solution 2 obtained in step (2), stir and disperse to obtain a mixed pigment dispersion;

[0040] (4) Feed the mixed pigment dispersion obtained in step (3) into a grinding machine for grinding, and filter after grinding to obtain a nano-aqueous pigment color paste coating.

[0041] In step (1), the stirring speed is 100 - 300 rpm, and the stirring time is 10 - 20 min.

[0042] In step (2), the stirring speed is 600 - 1000 rpm, and the stirring time is 30 - 50 min.

[0043] In step (3), the stirring speed is 200 - 500 rpm, and the stirring time is 15 - 20 min.

[0044] In step (4), the temperature of the material in the grinding equipment cavity is controlled at 0 - 60 °C, and the time is 3 - 6 h.

[0045] Example 1

[0046] A nano-aqueous pigment color paste, the components of which by mass fraction include 15 parts of pigment red PR122, 4 parts of humectant 1,2 - propylene glycol, 8 parts of surfactant Tego755, 0.5 part of acid - base regulator AMP - 95, 0.2 part of preservative Bestcide 3000, and the balance of deionized water. It is prepared according to the following method:

[0047] (1) Weigh 55 parts of deionized water, 6 parts of 1,2 - propylene glycol, 10 parts of Tego755, and 0.1 part of AMP - 95 by mass fraction, put them into a stirring kettle, and stir at a speed of 200 rpm for 15 min;

[0048] (2) Weigh 15 parts of pigment red PR122 by mass fraction, slowly add it to the stirring kettle, and stir at a speed of 800 rpm for 40 min;

[0049] (3) Weigh 0.2 part of preservative Bestcide 300 by mass fraction, add it to the stirring kettle for dispersion, and finally add deionized water until the total amount of raw materials is 100 parts, and stir at a speed of 300 rpm for 15 min to obtain a mixed pigment dispersion;

[0050] (4) Connect the mixed pigment dispersion liquid to a grinding machine for grinding. After grinding for 3 hours, take a sample. The laboratory uses a particle size analyzer to measure the particle size of the pigment. If the particle size is not <200 nm, continue grinding and measure the particle size every half hour until the particle size of the pigment meets the standard;

[0051] (5) Filter the above nano pigment slurry that meets the detection standard through a 0.45 μm filter element to obtain a nano aqueous pigment slurry coating.

[0052] Detect the particle size of the prepared nano pigment slurry above, and the obtained particle size distribution diagram is shown in Figure 1 .

[0053] Example 2

[0054] A nano aqueous pigment slurry, the components of which are calculated by mass fraction, include 15 parts of pigment red PR122, 6 parts of humectant 1,2 - propanediol, 10 parts of surfactant Tego755, 0.5 part of acid - base regulator AMP - 95, 0.2 part of preservative Bestcide 3000, and the balance of deionized water. It is prepared according to the following method:

[0055] (1) Weigh 55 parts of deionized water, 6 parts of 1,2 - propanediol, 10 parts of Tego755, and 0.1 part of AMP - 95 and put them into a stirring kettle. Stir at a speed of 200 rpm for 15 minutes;

[0056] (2) Weigh 15 parts of pigment red PR122 and slowly add it to the stirring kettle. Stir at a speed of 800 rpm for 40 minutes;

[0057] (3) Weigh 0.2 part of preservative Bestcide 300, add it to the stirring kettle for dispersion, and finally add deionized water until the total amount of raw materials is 100 parts. Stir at a speed of 300 rpm for 15 minutes to obtain a mixed pigment dispersion liquid;

[0058] (4) Connect the mixed pigment dispersion liquid to a grinding machine. Control the temperature of the grinding material in the cavity <60 °C and carry out grinding. After grinding for 3 hours, take a sample. The laboratory uses a particle size analyzer to measure the particle size of the pigment. If the particle size is not <200 nm, continue grinding and measure the particle size every half hour until the particle size of the pigment meets the standard;

[0059] (5) Filter the above nano pigment slurry that meets the detection standard through a 0.45 μm filter element to obtain a nano aqueous pigment slurry coating.

[0060] Example 3

[0061] A nano-aqueous pigment paste, the components of which by mass parts include 15 parts of pigment violet PV19, 4 parts of humectant 1,2-propanediol, 10 parts of surfactant BYK9151, 0.5 part of acid-base regulator AMP-95, 0.2 part of preservative Bestcide 3000, and the balance of deionized water. It is prepared according to the following method:

[0062] (1) Weigh 55 parts of deionized water, 6 parts of 1,2-propanediol, 10 parts of BYK 9151, and 0.1 part of AMP-95 by mass parts and put them into a stirring kettle, and stir for 15 min at a rotation speed of 200 rpm;

[0063] (2) Weigh 15 parts of pigment violet PV19 by mass parts, slowly add it to the stirring kettle, and stir for 40 min at a rotation speed of 800 rpm;

[0064] (3) Weigh 0.2 part of preservative Bestcide 300 by mass parts, add it to the stirring kettle for dispersion, and finally add deionized water until the total amount of raw materials is 100 parts, and stir for 15 min at a rotation speed of 300 rpm to obtain a mixed pigment dispersion;

[0065] (4) Connect the mixed pigment dispersion to a grinding machine for grinding. After grinding for 3 h, take a sample, and the laboratory uses a particle size analyzer to detect whether the particle size of the pigment is <200 nm by spectroscopy. If it does not meet the standard, continue grinding, and detect the particle size every half hour until the particle size of the pigment is qualified;

[0066] (5) Filter the above nano-pigment paste that meets the detection standard with a 0.45 μm filter element to obtain a nano-aqueous pigment paste coating.

[0067] The particle size of the above-prepared nano-pigment paste was detected, and the particle size distribution diagram is shown in Figure 2 .

[0068] Example 4

[0069] A nano-aqueous pigment paste, the components of which by mass parts include 15 parts of pigment violet PV19, 6 parts of humectant 1,2-propanediol, 10 parts of surfactant BYK 9151, 0.5 part of acid-base regulator AMP-950, 0.2 part of preservative Bestcide 3000, and the balance of deionized water. It is prepared according to the following method:

[0070] (1) Weigh 55 parts of deionized water, 6 parts of 1,2-propanediol, 10 parts of Tego755, and 0.1 part of AMP-95 by mass parts and put them into a stirring kettle, and stir for 15 min at a rotation speed of 200 rpm;

[0071] (2) Weigh 15 parts of pigment violet PV19 by mass parts, slowly add it to the stirring kettle, and stir for 40 min at a rotation speed of 800 rpm;

[0072] (3) Weigh 0.2 parts of the preservative Bestcide 300 by mass fraction, add it to a stirring kettle for dispersion, and finally add deionized water until the total amount of raw materials is 100 parts. Stir at 300 rpm for 15 min to obtain a mixed pigment dispersion liquid.

[0073] (4) Connect the mixed pigment dispersion liquid to a grinding machine. Control the temperature of the grinding material in the cavity at 0 - 60 °C and conduct grinding. After grinding for 3 h, take a sample, and the laboratory uses a particle size analyzer to measure the spectrum to detect whether the pigment particle size is <200 nm. If it does not meet the standard, continue grinding and measure the particle size every half hour until the pigment particle size is qualified.

[0074] (5) Filter the above nano - pigment color paste that meets the detection standard through a 0.45 - μm filter element to obtain a nano - aqueous pigment color paste coating.

[0075] Example 5

[0076] Use the nano - aqueous pigment color paste prepared in Example 3 to prepare a pigment - type inkjet ink, and conduct the following tests on the prepared pigment - type inkjet ink:

[0077] (1) Fluency and standby performance test

[0078] Use the prepared pigment - type inkjet ink to print 100 square meters in a diagonal spray on a printer produced by Guangzhou Kangyin Digital Technology Co., Ltd. using an EPSON I3200 print head. The number of broken holes is less than 2, indicating that the prepared pigment - type inkjet ink has good continuity when used for digital printing with an EPSON I3200 photo print head; under the conditions of a flash spray frequency of 43.2 kHz, a temperature of 28 °C, and a humidity of 60%, after standby for 4 h, the number of broken holes in the diagonal spray is less than 2. When used intermittently, flash spray once every 30 min for 3 consecutive times, and the number of broken holes in the 3 - time diagonal spray is less than 2, indicating that the prepared pigment - type inkjet ink has good standby performance on the EPSON I3200 print head, with good fluency, no line breakage, and no print head clogging.

[0079] (2) Compatibility test

[0080] Use the prepared pigment - type inkjet ink to print 100 square meters in a diagonal spray on a printer produced by Guangzhou Kangyin Digital Technology Co., Ltd. for DTF equipment using an EPSON I3200 print head. Set the ink output for printing at 100%. Test that the colored ink and white ink of the coating ink, and the ink and the printing film have good compatibility, and no ink hanging, ink flowing, or ink bleeding phenomena occur.

[0081] (3) Other tests

[0082] Conduct surface tension test, viscosity test, etc. on the prepared pigment - type pigment inkjet ink according to the corresponding standards.

[0083] The test results are as follows: surface tension: 29 N / m; viscosity (30 °C): 4 mPa·s. From the above test results, it can be seen that the nano-aqueous pigment paste prepared by the present invention meets the parameter requirements of the EPSON I3200 printhead for ink in terms of physical and chemical indexes such as surface tension and viscosity when used to prepare pigment inkjet ink.

[0084] 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 foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and 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 nano water-based pigment paste, characterized in that: The components thereof include, by weight, 10-20 parts of pigment, 1-10 parts of moisturizing agent, 5-20 parts of surfactant, 0-0.5 parts of acid-base regulator, 0.2-0.5 parts of preservative, and the balance of deionized water.

2. The nano water-based pigment paste according to claim 1, characterized in that: The pigment is selected from inorganic pigments or organic pigments, and is at least one of pigment white PW6, pigment black PB6, CI pigment black PB7, pigment blue PB15, pigment blue PB15:3, pigment blue PB15:4, pigment green 7, pigment violet PV19, pigment red PR122, pigment red PR176, pigment red PR177, pigment yellow PY74, pigment red PR254, pigment yellow PY138, pigment yellow PY155, pigment yellow PY150, and pigment yellow PY180.

3. The nano water-based pigment paste according to claim 1, characterized in that: The moisturizing agent is at least one of 1,2-propylene glycol, glycerol, diethylene glycol, diethylene glycol, triethylene glycol, PEG200, PEG300, PEG400, and PEG600.

4. The nano water-based pigment paste according to claim 1, characterized in that: The surfactant is selected from at least one of Tego410, Tego 755, Tego 760, AEO-9, Surfynol 465, BYK 190, BYK 9131, BYK 9132, BYK 9151, BYK9177, fatty alcohol polyoxyethylene ether, and Tween T80.

5. The nano water-based pigment paste according to claim 1, characterized in that: The preservative is selected from at least one of Bestcide300, BIT-20, Proxel GXL, Permachen SL-5600, Triadine 10, Vinkocide KTL, Triadine 3, EUXYI K100, and EUXYLPE 9010.

6. The nano water-based pigment paste according to claim 1, characterized in that: The acid-base regulator is selected from at least one of ammonia water, AMP-95, sodium hydroxide, triethylamine, diethanolamine, triethanolamine, trimethylamine, lactic acid, citric acid, and adipic acid.

7. Use of the nano water-based pigment paste according to any one of claims 1 to 6 in pigment-based inkjet ink.

8. A method for preparing the nano water-based pigment paste according to any one of claims 1 to 6, characterized in that: The steps include: (1) adding a moisturizer, a surfactant, an acid-base regulator, and deionized water in sequence and stirring and dispersing the mixture to obtain a mixed solution 1; (2) adding a pigment to the mixed solution 1 obtained in step (1), and continuing to stir and disperse to obtain a mixed solution 2; (3) adding a preservative to the mixed solution 2 obtained in step (2), stirring and dispersing to obtain a mixed pigment dispersion; (4) The mixed pigment dispersion obtained in step (3) is connected to a grinder for grinding, and after grinding, it is filtered to obtain a nano water-based pigment color paste coating.

9. The method for preparing the nano water-based pigment paste according to claim 8, characterized in that: In the step (1), the stirring speed is 100-300 rpm, and the stirring time is 10-20 min. In the step (2), the stirring speed is 600-1000 rpm, and the stirring time is 30-50 min. In the step (3), the stirring speed is 200-500 rpm, and the stirring time is 15-20 min.

10. The method for preparing the nano water-based pigment paste according to claim 8, characterized in that: In the step (4), the temperature of the ground material in the grinding equipment cavity is controlled at 0-60°C for 3-6 hours.

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