Low viscosity, high fluidity LED-UV curing rotary yellow ink

Abstract

The present invention relates to the technical field of printing inks, and in particular to a low-viscosity and high-fluidity LED-UV-curable rotary yellow ink. The low-viscosity and high-fluidity LED-UV-curable rotary yellow ink is composed of the following raw materials in percentage by weight: 10-15% of dipropylene glycol diacrylate, 8-10% of pentaerythritol triacrylate, 2-4% of fumed silica, 6-9% of a wear-resistant additive, 5-10% of a photoinitiator, 0.2-0.4% of a polymerization inhibitor, 2-3% of a dispersant, 7-13% of a yellow pigment, 1.5-2.5% of wax powder, and the balance being a binder. The binder is formed by compounding polyurethane acrylate and epoxy acrylate in a mass ratio of 2-3:1. The rotary yellow ink provided by the present invention not only has excellent antibacterial properties and extends its service life to a certain extent, but also has the advantages of wear resistance, low viscosity, and high fluidity, effectively ensuring the quality of the rotary yellow ink.

Description

Technical Field

[0001] The invention relates to the technical field of printing inks, and in particular to a low-viscosity and high-fluidity LED-UV curing rotary yellow ink. Background Art

[0002] Ink is the substance used to create graphic information during the printing process. Therefore, ink plays a crucial role in printing, directly determining the tone, color, and clarity of the image on the printed product. Understanding the composition and classification of inks is crucial for printing. Pigments and binders are the two main raw materials that make up ink. Rotary inks, specifically formulated for rotary printing presses (such as offset presses), typically require fast drying, high adhesion, and high printing speeds. These inks are used in large-scale printing operations such as newspapers, magazines, books, and packaging materials, enabling high-speed printing and mass production.

[0003] Patent application number CN201210181605.6 discloses a low-halogen, environmentally friendly rotary UV ink. Its raw material components and content (wt%) are: 55-75% mixed resin, 5-11% mixed UV initiator, 0.05-0.5% polymerization inhibitor, 1-2% dispersant, 16-45% pigment, 1-3% adhesion promoter, 1-3% anti-scratch and wear-resistant additive, and 3-8% functional filler. While the low-halogen, environmentally friendly rotary UV ink disclosed in this patent document offers advantages such as fast curing, being halogen-free, heavy metal-free, low irritation, excellent fluidity, and good adhesion, making it suitable for printing on a variety of substrates and rotary printing presses, it suffers from relatively poor wear resistance and antibacterial properties, as well as low fluidity, which to some extent affects its service life and quality. Therefore, the present invention provides a low-viscosity, high-fluidity LED-UV curable rotary yellow ink to address the aforementioned technical problems. Summary of the Invention

[0004] The purpose of the present invention is to provide a low-viscosity and high-fluidity LED-UV curing rotary yellow ink. The rotary yellow ink provided by the present invention not only has excellent antibacterial properties, which extends its service life to a certain extent, but also has the advantages of wear resistance, low viscosity and high fluidity, effectively ensuring its quality.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A low-viscosity, high-fluidity LED-UV curing rotary yellow ink is composed of the following raw materials in percentage by weight: 10-15% of dipropylene glycol diacrylate, 8-10% of pentaerythritol triacrylate, 2-4% of fumed silica, 6-9% of a wear-resistant additive, 5-10% of a photoinitiator, 0.2-0.4% of a polymerization inhibitor, 2-3% of a dispersant, 7-13% of a yellow pigment, 1.5-2.5% of wax powder, and the balance being a connecting material.

[0007] Furthermore, the preparation method of the wear-resistant additive is as follows: spherical cerium oxide is uniformly dispersed in a modified liquid at 50-60°C at a solid-liquid ratio of 20-40 g / L, and the reaction is kept warm for 3-5 hours under the protection of nitrogen; after the reaction is completed, sodium allyl sulfonate 1-2 times the mass of spherical cerium oxide, 0.03-0.04 times the mass of potassium persulfate, and 0.2-0.3 times the mass of didecyldimethylammonium chloride are added to the obtained product components, the mixture is mixed and stirred evenly, and the reaction is kept warm for 8-15 hours at a temperature of 60-70°C; after the reaction is completed, the obtained reaction product is subjected to solid-liquid separation, the filter cake is centrifuged and washed 3-5 times with anhydrous ethanol and acetone respectively, and then vacuum dried to constant weight, and the result is the wear-resistant additive.

[0008] Furthermore, the preparation method of the spherical cerium oxide is as follows: add 3-5% of octylphenol polyoxyethylene ether by mass to a 0.3-0.8 mol / L aqueous solution of cerium nitrate, mechanically stir for 5-10 minutes, add urea with a molar amount of 8-12 times that of the cerium nitrate, and ultrasonically mix to completely dissolve it; then keep the resulting mixed components at a temperature of 90-110°C for 10-15 hours; after the reaction is completed, naturally cool the resulting product components to room temperature, centrifuge and wash the resulting filter cake alternately with deionized water and anhydrous ethanol for 3-5 times; the washed filter cake is dried at a temperature of 60-90°C, and then calcined at a high temperature of 400-500°C for 3-5 hours to obtain spherical cerium oxide.

[0009] Furthermore, the preparation method of the modified liquid is: dissolving vinyltrimethoxysilane in an ethanol aqueous solution with a volume concentration of 60-75% at a dosage ratio of 0.1-0.2 g / mL, adjusting the pH to 3.2-3.8, and then stirring and hydrolyzing at a temperature of 30-40°C for 2-3 hours; the modified liquid is obtained after the hydrolysis is completed.

[0010] Furthermore, the photoinitiator is selected from any one of 2-isopropylthioxanthone, 4-dimethylaminobenzoic acid isooctyl ester, benzoin dimethyl ether, and 2,4-diethylthioxanthone.

[0011] Furthermore, the polymerization inhibitor is selected from any one of hydroquinone, tris(N-nitroso-N-phenylhydroxylamine)aluminum salt, and p-hydroxyanisole.

[0012] Furthermore, the dispersant is selected from any one of LubrizolSolsperse 3000, LubrizolSolsperseJ980, LubrizolSolsperse J900, and LubrizolSolsperse J928 dispersants.

[0013] Furthermore, the yellow pigment is selected from any one of Pigment Yellow 12, Pigment Yellow 13, and Pigment Yellow 14.

[0014] Furthermore, the wax powder is selected from any one of carnaba wax, paraffin wax and polyethylene wax.

[0015] Furthermore, the connecting material is compounded by polyurethane acrylate and epoxy acrylate in a mass ratio of 2 to 3:1.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] In the present invention, spherical cerium oxide is prepared using cerium nitrate, octylphenol polyoxyethylene ether, and urea as raw materials. The spherical cerium oxide is then added to a modifying solution composed of vinyltrimethoxysilane and ethanol. The spherical cerium oxide reacts chemically with the hydrolyzed vinyltrimethoxysilane, ultimately forming a chemical bond between the two. After the reaction is complete, sodium allyl sulfonate, potassium persulfate, and didecyldimethylammonium chloride are added to the resulting components, and the mixture is mixed and stirred to uniformly disperse and adsorb the didecyldimethylammonium chloride on the surface of the spherical cerium oxide. Due to the large specific surface area of ​​the spherical cerium oxide, a large amount of didecyldimethylammonium chloride is loaded onto its surface. Ultimately, a dense three-dimensional polymer envelope is formed on the surface of the spherical cerium oxide under the action of potassium persulfate. The presence of the three-dimensional envelope can exert a certain binding effect on the didecyldimethylammonium chloride on the surface of the spherical cerium oxide, reducing the probability of its migration. The synergistic effect of the spherical cerium oxide and didecyldimethylammonium chloride gives the prepared wear-resistant additive excellent antibacterial properties. Furthermore, the three-dimensional coating effectively improves the dispersion of the wear-resistant additive in the rotary yellow ink, making it more evenly dispersed. Since cerium oxide itself has excellent wear resistance, the spherical structure further enhances this. Ultimately, the synergistic effect of the spherical cerium oxide and its surface three-dimensional polymer coating significantly improves the wear resistance of the wear-resistant additive.

[0018] In summary, using the wear-resistant additive prepared in this invention as a raw material for LED-UV-curable rotary yellow ink not only effectively improves its antibacterial properties and extends its service life to a certain extent, but also significantly improves its wear resistance. Furthermore, the rotary yellow ink prepared in this invention has the advantages of low viscosity and high fluidity, effectively ensuring its quality. DETAILED DESCRIPTION

[0019] The following is a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention. Example 1

[0020] A low-viscosity, high-fluidity LED-UV-curable rotary yellow ink is composed of the following raw materials in percentage by weight: 10% propylene glycol diacrylate, 8% pentaerythritol triacrylate, 2% fumed silica, 6% wear-resistant additive, 5% 2-isopropylthioxanthone, 0.2% hydroquinone, 2% Lubrizol Solsperse 300 dispersant, 7% Pigment Yellow 12, 1.5% carnauba wax, and the balance being a binder; the binder is a compound of polyurethane acrylate and epoxy acrylate in a mass ratio of 2:1.

[0021] The preparation method of the wear-resistant additive is as follows: spherical cerium oxide is uniformly dispersed in a modified liquid at 50°C at a solid-liquid ratio of 20g / L, and the mixture is kept warm for reaction for 3 hours under the protection of nitrogen; after the reaction is completed, sodium allyl sulfonate (1 times the mass of the spherical cerium oxide), potassium persulfate (0.03 times the mass of the potassium persulfate), and didecyldimethylammonium chloride (0.2 times the mass of the didecyldimethylammonium chloride) are added to the obtained product components, the mixture is stirred evenly, and the mixture is kept warm for reaction at 60°C for 8 hours; after the reaction is completed, the obtained reaction product is subjected to solid-liquid separation, the filter cake is centrifuged and washed 3 times with anhydrous ethanol and acetone respectively, and then vacuum dried to constant weight, and the obtained product is the wear-resistant additive.

[0022] The preparation method of the modified liquid is as follows: vinyltrimethoxysilane is dissolved in an ethanol aqueous solution with a volume concentration of 60% at a dosage ratio of 0.1 g / mL, the pH is adjusted to 3.2, and then hydrolyzed at a temperature of 30° C. for 2 hours with stirring; the modified liquid is obtained after the hydrolysis is completed.

[0023] The preparation method of spherical cerium oxide is as follows: 3% by mass of octylphenol polyoxyethylene ether is added to a 0.3 mol / L aqueous solution of cerium nitrate, and after mechanical stirring for 5 minutes, urea with a molar amount of 8 times that of the cerium nitrate is added thereto, and ultrasonic mixing is performed to completely dissolve it; then the obtained mixed components are kept warm at a temperature of 90°C for 10 hours; after the reaction is completed, the obtained product components are naturally cooled to room temperature, and after centrifugal separation, the obtained filter cake is alternately washed with deionized water and anhydrous ethanol for 3 times; the washed filter cake is dried at a temperature of 60°C, and then calcined at a high temperature of 400°C for 3 hours to obtain spherical cerium oxide. Example 2

[0024] A low-viscosity, high-fluidity LED-UV-curable rotary yellow ink is composed of the following raw materials in percentage by weight: 12% propylene glycol diacrylate, 8% pentaerythritol triacrylate, 3% fumed silica, 8% wear-resistant additive, 7% 4-dimethylaminobenzoic acid isooctyl ester, 0.3% tris(N-nitroso-N-phenylhydroxylamine) aluminum salt, 2.5% Lubrizol Solsperse J98 dispersant, 10% pigment yellow 13, 2.0% paraffin wax, and the balance being a binder; the binder is prepared by compounding polyurethane acrylate and epoxy acrylate in a mass ratio of 3:1.

[0025] The preparation method of the wear-resistant additive is as follows: spherical cerium oxide is uniformly dispersed in a modified liquid at 55°C at a solid-liquid ratio of 30g / L, and the mixture is kept warm for 4 hours under the protection of nitrogen; after the reaction is completed, sodium allyl sulfonate twice the mass of the spherical cerium oxide, 0.03 times the mass of potassium persulfate, and 0.25 times the mass of didecyldimethylammonium chloride are added to the obtained product components, the mixture is stirred evenly, and the mixture is kept warm for 12 hours at a temperature of 65°C; after the reaction is completed, the obtained reaction product is subjected to solid-liquid separation, the filter cake is centrifuged and washed four times with anhydrous ethanol and acetone, and then vacuum dried to constant weight, and the obtained product is the wear-resistant additive.

[0026] The preparation method of the modified liquid is as follows: vinyltrimethoxysilane is dissolved in an ethanol aqueous solution with a volume concentration of 70% at a dosage ratio of 0.15 g / mL, the pH is adjusted to 3.5, and then stirred and hydrolyzed at a temperature of 35° C. for 3 hours; the modified liquid is obtained after the hydrolysis is completed.

[0027] The preparation method of spherical cerium oxide is as follows: 4% by mass of octylphenol polyoxyethylene ether is added to a 0.5 mol / L aqueous solution of cerium nitrate, and after mechanical stirring for 10 minutes, urea with a molar amount 10 times that of the cerium nitrate is added thereto, and ultrasonic mixing is performed to completely dissolve it; then the obtained mixed components are kept warm at a temperature of 100°C for 10 hours; after the reaction is completed, the obtained product components are naturally cooled to room temperature, and after centrifugal separation, the obtained filter cake is alternately washed with deionized water and anhydrous ethanol for 4 times; the washed filter cake is dried at a temperature of 70°C, and then calcined at a temperature of 450°C for 4 hours to obtain spherical cerium oxide. Example 3

[0028] A low-viscosity, high-fluidity LED-UV curable rotary yellow ink is composed of the following raw materials in percentage by weight: 15% propylene glycol diacrylate, 10% pentaerythritol triacrylate, 4% fumed silica, 9% wear-resistant additive, 10% benzoin dimethyl ether, 0.4% p-hydroxyanisole, 3% Lubrizol Solsperse J900 dispersant, 13% Pigment Yellow 14, 2.5% polyethylene wax, and the balance being a binder; the binder is formed by compounding polyurethane acrylate and epoxy acrylate in a mass ratio of 3:1.

[0029] The preparation method of the wear-resistant additive is as follows: spherical cerium oxide is uniformly dispersed in a modified liquid at 60°C at a solid-liquid ratio of 40g / L, and the mixture is kept warm for reaction for 5 hours under the protection of nitrogen; after the reaction is completed, sodium allyl sulfonate twice the mass of the spherical cerium oxide, 0.04 times the mass of potassium persulfate, and 0.3 times the mass of didecyldimethylammonium chloride are added to the obtained product components, the mixture is stirred evenly, and the mixture is kept warm for reaction at 70°C for 15 hours; after the reaction is completed, the obtained reaction product is subjected to solid-liquid separation, the filter cake is centrifuged and washed 5 times with anhydrous ethanol and acetone respectively, and then vacuum dried to constant weight, and the obtained product is the wear-resistant additive.

[0030] The preparation method of the modified liquid is as follows: vinyltrimethoxysilane is dissolved in an ethanol aqueous solution with a volume concentration of 75% at a dosage ratio of 0.2 g / mL, the pH is adjusted to 3.8, and then stirred and hydrolyzed at a temperature of 40° C. for 3 hours; the modified liquid is obtained after the hydrolysis is completed.

[0031] The preparation method of spherical cerium oxide is as follows: 5% by mass of octylphenol polyoxyethylene ether is added to a 0.8 mol / L aqueous solution of cerium nitrate, and after mechanical stirring for 10 minutes, urea with a molar amount 12 times that of the cerium nitrate is added thereto, and ultrasonic mixing is performed to completely dissolve it; then the obtained mixed components are kept warm at a temperature of 110°C for 15 hours; after the reaction is completed, the obtained product components are naturally cooled to room temperature, and after centrifugal separation, the obtained filter cake is alternately washed with deionized water and anhydrous ethanol for 5 times; the washed filter cake is dried at a temperature of 90°C, and then calcined at a temperature of 500°C for 5 hours to obtain spherical cerium oxide.

[0032] Comparative Example 1: The main difference between this example and Example 1 is that this comparative example uses an equal amount of spherical cerium oxide instead of the wear-resistant additive.

[0033] Comparative Example 2: The main difference between this example and Example 1 is that didecyl dimethyl ammonium chloride was not used in the process of preparing the wear-resistant additive in this comparative example.

[0034] Performance Testing

[0035] The following tests were performed on the various properties of the rotary yellow ink samples provided in Examples 1 to 3 and Comparative Examples 1 to 2:

[0036] 1. Antibacterial performance test: The antibacterial performance test was carried out on each group of rotary yellow ink samples. The culture medium was nutrient agar, and the bacterial species were Staphylococcus aureus, Escherichia coli and Aspergillus niger. A bacterial suspension with a concentration of 2.0×106mL was prepared respectively. 0.5g of rotary yellow ink sample was added to the bacterial suspension, and the suspension was cultured at 37°C for 24h, and the size of the inhibition zone was detected.

[0037] 2. Wear resistance test: Each group of rotary yellow ink samples was tested using an arc-shaped wear resistance wipe tester, with scores ranging from 1 to 5. The higher the score, the better the wear resistance.

[0038] 3. Fluidity test: Use a fluidity tester to test each group of rotary yellow ink samples.

[0039] 4. Adhesion test: Refer to GB / T13217.7-2023 "Test method for adhesion of ink" to test the adhesion of each group of rotary yellow ink samples.

[0040] Record the obtained test data in the following table:

[0041]

[0042] Comparing and analyzing the relevant data in the table shows that the rotary yellow ink provided by the present invention not only has excellent antibacterial properties, which significantly extend its service life, but also offers advantages such as wear resistance, low viscosity, and high fluidity, effectively guaranteeing its high quality. This demonstrates that the low-viscosity, high-fluidity LED-UV-curable rotary yellow ink provided by the present invention has a broader market prospect and is more suitable for promotion.

[0043] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0044] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations are possible based on the content of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A low-viscosity, high-fluidity LED-UV curable rotary yellow ink, characterized in that: It is composed of the following raw materials in weight percentage: 10-15% propylene glycol diacrylate, 8-10% pentaerythritol triacrylate, 2-4% fumed silica, 6-9% wear-resistant additive, 5-10% photoinitiator, 0.2-0.4% polymerization inhibitor, 2-3% dispersant, 7-13% yellow pigment, 1.5-2.5% wax powder, and the balance is binder; The preparation method of the wear-resistant additive comprises the following steps: uniformly dispersing spherical cerium oxide in a modified liquid at 50-60° C. at a solid-liquid ratio of 20-40 g / L, and carrying out a heat preservation reaction for 3-5 hours under nitrogen protection; after the reaction is completed, adding sodium allyl sulfonate (1-2 times the mass of the spherical cerium oxide), potassium persulfate (0.03-0.04 times the mass of the potassium persulfate), and didecyldimethylammonium chloride (0.2-0.3 times the mass of the didecyldimethylammonium chloride) to the resulting components, mixing and stirring the mixture evenly, and then heat preservation and reaction at 60-70° C. for 8-15 hours; after the reaction is completed, performing solid-liquid separation on the resulting reaction product, washing the filter cake with anhydrous ethanol and acetone for 3-5 times, and then vacuum drying the filter cake to a constant weight, thereby obtaining the wear-resistant additive; The preparation method of spherical cerium oxide comprises the following steps: adding 3-5% by mass of octylphenol polyoxyethylene ether to a 0.3-0.8 mol / L aqueous solution of cerium nitrate, mechanically stirring for 5-10 minutes, adding urea in a molar amount 8-12 times that of the cerium nitrate, and ultrasonically mixing to completely dissolve the urea; then, heat-retaining the resulting mixture at a temperature of 90-110° C. for 10-15 hours; after the reaction is completed, naturally cooling the resulting components to room temperature, centrifuging, and washing the resulting filter cake alternately with deionized water and anhydrous ethanol for 3-5 times; drying the washed filter cake at a temperature of 60-90° C., and then calcining at a temperature of 400-500° C. for 3-5 hours to obtain spherical cerium oxide; The preparation method of the modified liquid is as follows: vinyltrimethoxysilane is dissolved in an ethanol aqueous solution with a volume concentration of 60-75% at a dosage ratio of 0.1-0.2 g / mL, the pH is adjusted to 3.2-3.8, and then the mixture is stirred and hydrolyzed at a temperature of 30-40° C. for 2-3 hours; and the modified liquid is obtained after the hydrolysis is completed.

2. The low-viscosity, high-flow LED-UV curable rotary yellow ink according to claim 1, characterized in that: The photoinitiator is selected from any one of 2-isopropylthioxanthone, 4-dimethylaminobenzoic acid isooctyl ester, benzoin dimethyl ether, and 2,4-diethylthioxanthone.

3. The low-viscosity, high-flow LED-UV curable rotary yellow ink according to claim 1, characterized in that: The polymerization inhibitor is selected from any one of hydroquinone, tris(N-nitroso-N-phenylhydroxylamine)aluminum salt, and p-hydroxyanisole.

4. The low-viscosity, high-flow LED-UV curable rotary yellow ink according to claim 1, characterized in that: The dispersant is selected from any one of LubrizolSolsperse 3000, LubrizolSolsperse J980, LubrizolSolsperseJ900, and LubrizolSolsperse J928 dispersants.

5. The low-viscosity, high-flow LED-UV curable rotary yellow ink according to claim 1, characterized in that: The yellow pigment is selected from any one of Pigment Yellow 12, Pigment Yellow 13, and Pigment Yellow 14.

6. The low-viscosity, high-flow LED-UV curable rotary yellow ink according to claim 1, characterized in that: The wax powder is selected from any one of carnaba wax, paraffin wax and polyethylene wax.

7. The low-viscosity, high-flow LED-UV curable rotary yellow ink according to claim 1, characterized in that: The connecting material is prepared by compounding polyurethane acrylate and epoxy acrylate in a mass ratio of 2 to 3:1.

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