High abrasion resistance matt uv ink for printing and its preparation method

Abstract

This invention discloses a high-abrasion-resistant UV matte ink for printing and its preparation method. The high-abrasion-resistant UV matte ink for printing includes the following components: polyurethane acrylate, photoinitiator, raw tung oil, UV monomer, modified nanoparticle dispersion, matting agent, and additives. Compared with existing products, the ink of this application not only has excellent printability, but also has a fine and stable texture, is not prone to agglomeration, dries evenly and quickly, is fast and efficient in printing, has strong adhesion, and is tough and abrasion-resistant. When this ink is printed on digital 3C products, the printing thickness only needs to be 3-5 μm. Even after more than 5,000 rubs, the clarity and integrity of the pattern and text can still be guaranteed, greatly improving the durability of electronic products. It can be widely used for coating and protection of digital 3C products.

Description

Technical Field

[0001] This invention relates to the field of ink technology, specifically to a high-abrasion-resistant matte UV ink for printing and its preparation method. Background Technology

[0002] With social progress and the gradual improvement of people's material and cultural standards, the manufacturing industries related to digital 3C electronic products, such as computers, communications, and consumer electronics, have developed rapidly. Digital 3C electronic products are increasingly developing towards diversified functions, refined performance, and personalized decoration. Therefore, it is necessary to print coatings on the surfaces of various components of digital 3C electronic products to play a decorative, marking, or other functional role.

[0003] Matte UV inks are characterized by their soft appearance and strong texture. With technological advancements and changing aesthetic preferences, high-end digital 3C electronic products often require high-abrasion-resistant UV inks with a fully matte finish. However, the current market is dominated by high-gloss UV inks, with matte UV inks being less common and less abrasion-resistant, failing to achieve abrasion resistance of over a thousand cycles. The poor abrasion resistance of existing matte UV inks may be due to the presence of large amounts of matting and abrasion-resistant powders, poor coating of the ink substrate with the powders, and poor compatibility. To improve abrasion resistance, it is often necessary to increase the coating thickness (generally above 10µm). However, increasing the coating thickness leads to an increase in the number of printing cycles, reducing production efficiency. Therefore, reducing the coating thickness while improving the abrasion resistance of matte UV inks is a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0004] To address the aforementioned challenges, one of the objectives of this application is achieved through the following technical solution:

[0005] A high-abrasion-resistant matte UV ink for printing comprises the following components by weight: 26-58 parts polyurethane acrylate, 7-11 parts photoinitiator, 5-9 parts raw tung oil, 17-27 parts UV monomer, 7-13 parts modified nanopowder dispersion, 5-9 parts matting agent, and 1-5 parts additives.

[0006] Preferably, the polyurethane acrylate has 6 to 15 functional groups. After photocuring, the polyurethane acrylate with high functional groups forms a denser cross-linked network, which is beneficial to improving the wear resistance of the finished product.

[0007] Preferably, the photoinitiator is one or more of 1-hydroxycyclohexylphenyl ketone, 2,4,6-trimethylbenzoyl-diphenylphosphine oxide, ethyl 2,4,6-trimethylbenzoylphenylphosphonate, 2-methyl-2-(4-morpholino)-1-[4-(methylthio)phenyl]-1-propanone, 4-(phenylthio)phenyldiphenylthionium hexafluorophosphate, and 4,4'-xylyliodothionium hexafluorophosphate. The above photoinitiators have good solubility and reactivity in this system, high initiation efficiency, fast curing speed, and good curing effect.

[0008] Preferably, the UV monomer is one or more of the following: pentaerythritol hexaacrylate, pentaerythritol triacrylate, trimethylolpropane triacrylate, 1,6-hexanediol diacrylate, isobornyl methacrylate, and isobornyl acrylate.

[0009] Preferably, the matting agent is talc or precipitated silica.

[0010] Preferably, the additives include at least one of leveling agents and defoamers.

[0011] Preferably, the defoamer is an organosilicon defoamer or a polyether defoamer.

[0012] Preferably, the method for preparing the modified nanopowder dispersion includes the following steps:

[0013] Add 50-70 parts of butyl acetate to a container, then add 5-15 parts of nanoparticles, heat to 50-70℃, disperse at high speed for 0.5-1.5h, then add 5-15 parts of silane coupling agent KH560 dropwise while stirring, and continue high-speed dispersion for 1-3h to obtain mixture a;

[0014] Add 30-50 parts of UV monomer to another container, heat to 75-85℃ and keep warm for 10-30 minutes, then add the above mixture a, continue to keep warm and stir for 1-3 hours at a stirring speed of 3000-8000 r / min to obtain a modified nanopowder dispersion.

[0015] Preferably, the nanoparticles are one or more of nano-alumina, nano-zirconia, nano-silica, and nano-magnesium oxide. Modifying the nanoparticles with the silane coupling agent KH560 not only improves the water resistance and corrosion resistance of the ink, but also enhances the compatibility of the nanoparticles with polyurethane acrylates.

[0016] The second objective of this application is achieved using the following technical solution:

[0017] The above-mentioned method for preparing high-abrasion-resistant matte UV ink for printing includes the following steps: Adding the above-mentioned mass proportions of polyurethane acrylate, photoinitiator, raw tung oil, UV monomer, and modified nanoparticle dispersion to a container; stirring at 3000-8000 r / min for 10-30 min at 80-120℃ to obtain a mixed base material; then, after the mixed base material cools to room temperature, adding the above-mentioned mass proportions of additives and matting agent to the mixed base material; and dispersing at a high speed of 5000-10000 r / min for 10-20 min under normal temperature and pressure to obtain the finished product. Using a slightly longer stirring time and a higher stirring speed allows the defoamer to exert its optimal defoaming effect, eliminating air generated during ink production, ensuring uniform bonding between ink components, and improving the overall performance of the ink.

[0018] The beneficial effects are as follows: This application uses silane coupling agent KH560 to modify nanoparticles to obtain a modified nanoparticle dispersion that is not prone to agglomeration. It can be uniformly dispersed in the system, improving the overall stability of the ink. At the same time, raw tung oil is added to the system. Due to its good lubricity, raw tung oil can improve the compatibility between raw materials, especially the wetting effect of polyurethane acrylate on modified nanoparticles, resulting in better coating effect of polyurethane acrylate on modified nanoparticles. In addition, the added raw tung oil reacts with UV monomers during heating and stirring to obtain modified raw tung oil. The modified raw tung oil crosslinks with polyurethane acrylate, forming a denser crosslinked network during ink curing, which improves the adhesion of the ink. Furthermore, during ink curing, the raw tung oil on the surface of the ink will preferentially absorb UV and cure compared to the raw tung oil inside, resulting in micro-wrinkles on the ink surface, making the ink surface rougher, reducing specular reflection of light and increasing scattered light, thus achieving a matting effect. Compared with existing products, the ink of this application not only has excellent printability, but also has a fine and stable texture, is not prone to agglomeration, dries evenly and quickly, and is quick and efficient to print. It also has strong adhesion, toughness and wear resistance. When this ink is printed on digital 3C products, the printing thickness is only 3-5 μm. Even if the number of rubbing cycles reaches more than 5,000, the clarity and integrity of the pattern and text can still be guaranteed, which greatly improves the durability of electronic products and can be widely used for coating protection of digital 3C products. Detailed Implementation

[0019] The present invention will now be described in further detail with reference to specific embodiments, so that those skilled in the art can more clearly understand the present invention.

[0020] The following embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. All other embodiments obtained by those skilled in the art based on the specific embodiments of the invention without inventive effort are within the protection scope of the invention.

[0021] In the embodiments of the present invention, unless otherwise specified, all raw material components are commercially available products well known to those skilled in the art; in the embodiments of the present invention, unless specifically specified, the technical means used are conventional means well known to those skilled in the art.

[0022] Raw material source:

[0023] Polyurethane acrylate, purchased from Aijianmeng International Trading (Shanghai) Co., Ltd.;

[0024] 1-Hydroxycyclohexylphenyl ketone, purchased from Shanghai Mairui Biochemical Technology Co., Ltd.;

[0025] 2,4,6-Trimethylbenzoyl-diphenylphosphine oxide was purchased from Hubei Xinninghong Biomedical Technology Co., Ltd.

[0026] Ethyl 2,4,6-trimethylbenzoylphenylphosphonate was purchased from Hubei Jianchu Biomedical Co., Ltd.

[0027] 2-Methyl-2-(4-morpholino)-1-[4-(methylthio)phenyl]-1-propanone, purchased from Hubei Huada Fine Chemical Co., Ltd.;

[0028] 4-(phenylthio)phenyldiphenylthionium hexafluorophosphate (TAS) was purchased from Nanjing Jiazhong Chemical Co., Ltd.

[0029] 4,4'-Xylyliodonium hexafluorophosphate was purchased from Shaanxi Didu New Materials Co., Ltd.

[0030] Raw tung oil, purchased from Shandong Tongxin Chemical Co., Ltd.;

[0031] Dipentaerythritol hexaacrylate, purchased from Zhongshan Dixin Chemical Co., Ltd.;

[0032] Pentaerythritol triacrylate was purchased from Jinan Yuno Chemical Co., Ltd.

[0033] Trimethylolpropane triacrylate (TMPTA) was purchased from Zhengzhou Aikem Chemical Co., Ltd.

[0034] 1,6-Hexanediol diacrylate, purchased from Jiangsu Runfeng Synthetic Technology Co., Ltd.;

[0035] Isoborneol methacrylate, purchased from Jinan Jinbang Environmental Protection Technology Co., Ltd.

[0036] Isoborneol acrylate, purchased from Shandong Senya New Materials Co., Ltd.;

[0037] Butyl acetate, purchased from Guangdong Qiming Chemical Technology Co., Ltd.;

[0038] Silane coupling agent KH560 was purchased from Shanghai Yuanye Biotechnology Co., Ltd.

[0039] Nano-alumina, purchased from Hubei Huifu Nanomaterials Co., Ltd.;

[0040] Nano-zirconia, purchased from Nanjing Tianxing New Materials Co., Ltd.

[0041] Nano-silica, purchased from Hangzhou Jiupeng New Materials Co., Ltd.;

[0042] Nano magnesium oxide, purchased from Hebei Chuangzhiyuan Biotechnology Co., Ltd.

[0043] Matte powder, purchased from Henan Yilu Chemical Technology Co., Ltd.;

[0044] Talc powder, purchased from Foshan Jinlinda Chemical Co., Ltd.;

[0045] Precipitated silica, purchased from Shandong Wanhua Tianhe New Materials Co., Ltd.

[0046] Leveling agent, purchased from Laiyang Shengbang Organosilicon Technology Co., Ltd.

[0047] Defoamer, purchased from Shanleqimin Chemical Technology Co., Ltd.;

[0048] All other reagents were commercially available.

[0049] Example 1

[0050] This embodiment provides a high abrasion-resistant matte UV ink for printing, which includes the following components by weight: 42 parts polyurethane acrylate, 9 parts photoinitiator, 7 parts raw tung oil, 22 parts UV monomer, 10 parts modified nanoparticle dispersion, 7 parts matting powder, and 3 parts additives.

[0051] The polyurethane acrylate has 15 functional groups. The photoinitiator is obtained by mixing 1-hydroxycyclohexylphenyl ketone and 4-(phenylthio)phenyldiphenylthionium hexafluorophosphate in a 1:1 mass ratio. The UV monomer is obtained by mixing dipentaerythritol hexaacrylate and trimethylolpropane triacrylate in a 1:1 mass ratio. The matting agent is talc powder. The additives are obtained by mixing leveling agent and silicone defoamer in a 1:1 mass ratio.

[0052] The preparation method of the above-mentioned high abrasion resistant matte UV ink for printing includes the following steps: adding the above-mentioned mass parts of polyurethane acrylate, photoinitiator, raw tung oil, UV monomer and modified nanopowder dispersion to a container, stirring at 5000 r / min for 20 min at 100°C to obtain a mixed base material, then letting the mixed base material cool to room temperature, adding the above-mentioned mass parts of additives and matting powder to the mixed base material, and dispersing at 8000 r / min for 15 min at room temperature and pressure to obtain the finished product;

[0053] The modified nanoparticle dispersion was prepared by the following method: 60 parts of butyl acetate, 5 parts of nano-alumina and 5 parts of nano-silica were added to a container, heated to 60°C, and dispersed at high speed for 1 hour. Then, 10 parts of silane coupling agent KH560 were added dropwise while stirring, and the dispersion was continued at high speed for 2 hours to obtain mixture a. In another container, 40 parts of UV monomer were added, heated to 80°C and kept warm for 20 minutes. Then, the above mixture a was added, and the mixture was kept warm and stirred for 2 hours at a stirring speed of 5000 r / min to obtain the modified nanoparticle dispersion.

[0054] Example 2

[0055] This embodiment provides a high abrasion-resistant matte UV ink for printing, which includes the following components by weight: 58 parts polyurethane acrylate, 7 parts photoinitiator, 5 parts raw tung oil, 17 parts UV monomer, 7 parts modified nanoparticle dispersion, 5 parts matting powder, and 1 part additive.

[0056] The polyurethane acrylate has 9 functional groups. The photoinitiator is obtained by mixing 2,4,6-trimethylbenzoyl-diphenylphosphine oxide, ethyl 2,4,6-trimethylbenzoylphenylphosphonate, and 4,4'-xylyl iodonium hexafluorophosphate in a mass ratio of 2:2:3. The UV monomer is obtained by mixing pentaerythritol triacrylate, 1,6-hexanediol diacrylate, and trimethylolpropane triacrylate in a mass ratio of 5:5:7. The matting agent is precipitated silica. The additives are obtained by mixing leveling agent and polyether defoamer in a mass ratio of 1:1.

[0057] The preparation method of the above-mentioned high abrasion resistant matte UV ink for printing includes the following steps: adding the above-mentioned mass parts of polyurethane acrylate, photoinitiator, raw tung oil, UV monomer and modified nanopowder dispersion to a container, stirring at 8000 r / min for 10 min at 120°C to obtain a mixed base material, then letting the mixed base material cool to room temperature, adding the above-mentioned mass parts of additives and matting powder to the mixed base material, and dispersing at 10000 r / min for 10 min at room temperature and pressure to obtain the finished product;

[0058] The modified nanopowder dispersion was prepared by the following method: 70 parts of butyl acetate, 2.5 parts of nano-zirconia and 2.5 parts of nano-silica were added to a container, heated to 70°C, and dispersed at high speed for 0.5 h. Then, 15 parts of silane coupling agent KH560 were added dropwise while stirring, and the high-speed dispersion was continued for 3 h to obtain mixture a. In another container, 50 parts of UV monomer were added, heated to 85°C and kept at that temperature for 10 min. Then, the above mixture a was added, and the mixture was kept at that temperature and stirred for 3 h at a stirring speed of 8000 r / min to obtain the modified nanopowder dispersion.

[0059] Example 3

[0060] This embodiment provides a high abrasion-resistant matte UV ink for printing, which includes the following components by weight: 26 parts polyurethane acrylate, 11 parts photoinitiator, 9 parts raw tung oil, 27 parts UV monomer, 13 parts modified nanoparticle dispersion, 9 parts matting powder, and 5 parts additives.

[0061] The polyurethane acrylate has 6 functional groups. The photoinitiator is obtained by mixing 2-methyl-2-(4-morpholino)-1-[4-(methylthio)phenyl]-1-propanone and 4-(phenylthio)phenyldiphenylthionium hexafluorophosphate in a mass ratio of 1:1. The UV monomer is obtained by mixing isoborneol methacrylate, isoborneol acrylate and trimethylolpropane triacrylate in a mass ratio of 5:5:7. The matting agent is talc powder. The additives are obtained by mixing leveling agent and silicone defoamer in a mass ratio of 1:1.

[0062] The preparation method of the above-mentioned high abrasion resistant matte UV ink for printing includes the following steps: adding the above-mentioned mass parts of polyurethane acrylate, photoinitiator, raw tung oil, UV monomer and modified nanopowder dispersion to a container, stirring at 3000 r / min for 30 min at 80°C to obtain a mixed base material, then letting the mixed base material cool to room temperature, adding the above-mentioned mass parts of additives and matting powder to the mixed base material, and dispersing at 5000 r / min for 20 min at room temperature and pressure to obtain the finished product;

[0063] The modified nanopowder dispersion was prepared by the following method: 50 parts of butyl acetate and 15 parts of nanopowder were added to a container, heated to 50°C, and dispersed at high speed for 1.5 h. Then, 5 parts of silane coupling agent KH560 were added dropwise while stirring, and the dispersion was continued at high speed for 1 h to obtain mixture a. In another container, 30 parts of UV monomer were added, heated to 75°C and kept warm for 30 min, and then the above mixture a was added. The mixture was kept warm and stirred for 1 h at a stirring speed of 3000 r / min to obtain the modified nanopowder dispersion.

[0064] Comparative Example 1

[0065] The difference between this comparative example and Example 1 is that epoxy acrylate is used instead of polyurethane acrylate in Example 1, while the other components and experimental procedures are the same as in Example 1.

[0066] Comparative Example 2

[0067] The difference between this comparative example and Example 1 is that ordinary nano-silica is used instead of the modified nanopowder dispersion in Example 1, while the other components and experimental steps are the same as in Example 1.

[0068] Comparative Example 3

[0069] The difference between this comparative example and Example 1 is that the amount of polyurethane acrylate was increased to 49 parts, and no raw tung oil was added. All other components and experimental procedures were the same as in Example 1.

[0070] Comparative Example 4

[0071] The difference between this comparative example and Example 1 is that the amount of polyurethane acrylate was increased to 64 parts, and no UV monomer was added. All other components and experimental procedures were the same as in Example 1.

[0072] Performance testing methods:

[0073] According to the standard CYT 227-2020 "Requirements and Test Methods for the Use of UV-curable Inks for Flexographic Printing": the temperature in the production workshop is controlled at (23±5)℃, and the relative humidity is controlled at (60±20)%RH. Examples 1 to 3 and Comparative Examples 1 to 4 of this application are coated on digital 3C electronic products (printing thickness 3-5µm), and the appearance, gloss, fineness, viscosity, curing effect, anti-blocking, bonding strength, and abrasion resistance are tested under the above standard environment. The methods for each performance test are as follows:

[0074] Gloss: The gloss of the printed material was measured using a gloss meter after it had just dried.

[0075] Fineness: Tested according to the test methods in GB / T 13217.3-2008 "Test Method for Fineness of Liquid Ink";

[0076] Viscosity: Tested according to the test methods in GB / T 13217.4-2008 "Test Method for Viscosity of Liquid Inks";

[0077] Surface curing effect: Cut the freshly dried printed material into multiple samples with a length × width of 50mm × 50mm. After the printed surfaces of two samples are placed face to face and then fixed with tape, place them between two 0.5mm thick flat glass plates slightly larger than the samples. Place a 2kg weight on the flat glass plate and leave it at room temperature for 10 minutes. Then peel it off by hand and observe the surface of the printed material. If there is no adhesion, the curing is good.

[0078] Deep curing effect: Using a friction tester conforming to ASTM D5264, wrap a 5g weight with cotton yarn, completely wet it with acetone, and gently wipe the sample surface back and forth 20 times. The cotton yarn does not fade (one back and forth stroke counts as one stroke).

[0079] Anti-adhesion: Cut the freshly dried printed material into multiple samples with a length × width of 50mm × 50mm. After the printed materials are placed face to face and fixed with adhesive tape, they are placed between two 0.5mm thick flat glass plates. A 2kg weight is placed on the glass plate and placed in a constant temperature and humidity chamber at 50℃ and 85% humidity. After 2 hours, the samples are taken out and peeled off by hand at room temperature. The surface of the printed materials is observed to be free of adhesion and peeling.

[0080] Adhesion strength: On the printed pattern, use a cross-cutting tool with a 2mm spacing to make intersecting grids. After brushing away any surface residue with a soft brush, test with a 19mm wide test tape with a peel strength of (0.44±0.01) N / mm. The tape should adhere tightly to the ink surface of the printed material without air bubbles. The tape should be 50mm long and held for 30 seconds. Then, peel the tape off at a 45° angle within 1 second and record the area of ​​detachment.

[0081] Abrasion resistance: The above ink was printed on an ABS board in a square pattern measuring 20mm x 20mm. After curing under UV light, an abrasion resistance test was conducted. The abrasion resistance test was performed using a rubber abrasion tester. The test rubber was a TEBER CS-10 rubber, with a 500g weight. The test stroke was 50mm, and the rotation speed was 60 revolutions per minute. One round trip of the rubber was counted as one test. The number of times the pattern began to show gaps or show the substrate was recorded.

[0082] See Table 1 for details of the performance testing standards.

[0083] Table 1 Performance Testing Standards

[0084] project Performance requirements Appearance No foreign matter, no lumps Fineness ≤10um Viscosity (MPa.s) 15～100 Gloss level / 60° ≤8 Surface curing effect No adhesion Deep curing effect The cotton yarn did not fade after wiping the sample surface back and forth 20 times. Anti-adhesion The surface of the printed material should be free of adhesion and ink peeling. Bond strength The area of ​​ink peeling off the printed material should not exceed 10% of the test area. Abrasion resistance (times) ≥300

[0085] The performance test results of Examples 1 to 3 and Comparative Examples 1 to 4 are detailed in Table 2.

[0086] Table 2. Results of performance tests for Examples 1 to 3 and Comparative Examples 1 to 4

[0087]

[0088]

[0089] As shown in Table 2 above, the inks prepared in Examples 1 to 3 exhibit good appearance and a good matte finish. They demonstrate good surface and deep curing effects, high bonding strength, and strong abrasion resistance. When printed on digital 3C products, the ink thickness only needs to be 3-5 μm, and even after more than 5,000 rubs, the clarity and integrity of the patterns and text can be maintained. Compared with Example 1, Comparative Example 1, replacing polyurethane acrylate with epoxy acrylate resulted in clumping, decreased viscosity, increased gloss, poor curing effect, poor anti-blocking properties, low bonding strength, and poor abrasion resistance. This may be due to the poor compatibility of epoxy acrylate with other components in the system, especially with the modified nanoparticle dispersion. Comparative Example 2, replacing the modified nanoparticle dispersion with ordinary nano-silica, also showed clumping, indicating that the nanoparticles, after modification with the silane coupling agent KH560, can indeed be more uniformly dispersed in the system. Comparative Example 3, without the addition of raw tung oil, also showed clumping, which significantly affected gloss and abrasion resistance. This may be due to the lack of raw tung oil. The poor compatibility between the raw material components leads to clumping. At the same time, without raw tung oil, the polyurethane acrylate cannot form a denser cross-linked network, resulting in poor ink adhesion, easy peeling, and poor abrasion resistance. Furthermore, due to the lack of raw tung oil, the ink cannot form micro-wrinkles during the curing process, thus the matting effect is poor, resulting in high gloss. In Comparative Example 4, after replacing the UV monomer with polyurethane acrylate, phenomena such as increased viscosity, decreased gloss, easy peeling, and poor abrasion resistance were observed. The increase in viscosity may be due to the increased content of polyurethane acrylate. The other phenomena may be due to the fact that without UV monomer, the raw tung oil cannot be modified, thus preventing it from cross-linking with the polyurethane acrylate to form a denser network.

[0090] In summary, this application uses silane coupling agent KH560 to modify nanoparticles to obtain a modified nanoparticle dispersion that is not prone to agglomeration. This dispersion can be uniformly dispersed in the system, improving the overall stability of the ink. Simultaneously, raw tung oil is added to the system. Due to its good lubricity, raw tung oil improves the compatibility between raw materials, especially enhancing the wetting effect of polyurethane acrylate on the modified nanoparticles, resulting in better coating of the modified nanoparticles by the polyurethane acrylate. Furthermore, the added raw tung oil reacts with UV monomers during heating and stirring to obtain modified raw tung oil. The modified raw tung oil crosslinks with the polyurethane acrylate, forming a denser crosslinked network during ink curing, thus improving ink adhesion. Moreover, during ink curing, the raw tung oil on the ink surface preferentially absorbs UV light and cures compared to the inner layer, resulting in micro-wrinkles on the ink surface, making the ink surface rougher, reducing specular reflection of light and increasing scattered light, achieving a matting effect. Compared with existing products, the ink of this application not only has excellent printability, but also has a fine and stable texture, is not prone to agglomeration, dries evenly and quickly, and is quick and efficient to print. It also has strong adhesion, toughness and wear resistance. When this ink is printed on digital 3C products, the printing thickness is only 3-5 μm. Even if the number of rubbing cycles reaches more than 5,000, the clarity and integrity of the pattern and text can still be guaranteed, which greatly improves the durability of electronic products and can be widely used for coating protection of digital 3C products.

[0091] The above are merely embodiments of the present invention and are not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of the present invention should be included within the scope of the claims of the present invention.

Claims

1. A high-abrasion-resistant matte UV ink for printing, characterized in that, The product comprises the following components by weight: 26-58 parts polyurethane acrylate, 7-11 parts photoinitiator, 5-9 parts raw tung oil, 17-27 parts UV monomer, 7-13 parts modified nanoparticle dispersion, 5-9 parts matting agent, and 1-5 parts additives; among which... The method for preparing the modified nanopowder dispersion includes the following steps: Add 50-70 parts of butyl acetate to a container, then add 5-15 parts of nanoparticles, heat to 50-70℃, disperse at high speed for 0.5-1.5h, then add 5-15 parts of silane coupling agent KH560 dropwise while stirring, and continue high-speed dispersion for 1-3h to obtain mixture a; Add 30-50 parts of UV monomer to another container, heat to 75-85℃ and keep warm for 10-30 minutes, then add the above mixture a, continue to keep warm and stir for 1-3 hours at a stirring speed of 3000-8000 r / min to obtain the modified nanopowder dispersion. The polyurethane acrylate functional groups are 6 to 15.

2. The high-abrasion-resistant matte UV ink for printing according to claim 1, characterized in that, The photoinitiator is one or more of the following: 1-hydroxycyclohexylphenyl ketone, 2,4,6-trimethylbenzoyl-diphenylphosphine oxide, ethyl 2,4,6-trimethylbenzoylphenylphosphonate, 2-methyl-2-(4-morpholino)-1-[4-(methylthio)phenyl]-1-propanone, 4-(phenylthio)phenyldiphenylthionium hexafluorophosphate, and 4,4'-xylyliodothionium hexafluorophosphate.

3. The high-abrasion-resistant matte UV ink for printing according to claim 1, characterized in that, The UV monomer is one or more of the following: pentaerythritol hexaacrylate, pentaerythritol triacrylate, trimethylolpropane triacrylate, 1,6-hexanediol diacrylate, isobornyl methacrylate, and isobornyl acrylate.

4. The high-abrasion-resistant matte UV ink for printing according to claim 1, characterized in that, The matting agent is talc or precipitated silica.

5. The high-abrasion-resistant matte UV ink for printing according to claim 1, characterized in that, The additives include at least one of leveling agents and defoamers.

6. The high-abrasion-resistant matte UV ink for printing according to claim 5, characterized in that, The defoamer is a silicone defoamer or a polyether defoamer.

7. The high-abrasion-resistant matte UV ink for printing according to claim 1, characterized in that, The nanoparticles are one or more of nano-alumina, nano-zirconia, nano-silicon oxide, and nano-magnesium oxide.

8. The method for preparing high-abrasion-resistant matte UV ink for printing according to claim 1, characterized in that, The process includes the following steps: adding the specified mass fractions of polyurethane acrylate, photoinitiator, raw tung oil, UV monomer, and modified nanoparticle dispersion to a container, stirring at 3000-8000 r / min for 10-30 min at 80-120℃ to obtain a mixed base material, then cooling the mixed base material to room temperature, adding the specified mass fractions of additives and matting powder to the mixed base material, and dispersing at 5000-10000 r / min at high speed for 10-20 min under normal temperature and pressure to obtain the finished product.

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