Scratch-resistant waterborne dual-cure ultra-matte coating, preparation method and application thereof

Abstract

The application discloses an anti-scratching water-based double-curing ultra-matte paint as well as a preparation method and application thereof. The anti-scratching water-based double-curing ultra-matte paint is composed of component A and component B, and the preparation raw materials of the component A include the following components in parts by weight: water-based double-curing polyurethane acrylate resin 60-70 parts, matt agent 10-15 parts, photoinitiator 3-4 parts, hydroxyl-modified polyorganosiloxane emulsion 2-3 parts, and water 5-20 parts. The matt agent is a nano-silicon dioxide water dispersion. The application solves the appearance defects of the current market matte paint product, such as poor surface scratch resistance, poor permeability, misting and whitening, and poor rubbing resistance and brightness, after a large amount of matt agent is added.

Description

Technical Field

[0001] This invention belongs to the field of water-based coatings, specifically relating to a scratch-resistant water-based dual-curing ultra-matte coating, its preparation method, and its application. Background Technology

[0002] In recent years, with the rapid development of the 3C electronics industry, the use of coatings that protect and decorate the surfaces of various products has been increasing, especially with the growing environmental awareness of consumers, leading to a continuous increase in the use of water-based coatings. Ultra-matte products, with their strong texture, soft and non-glaring finish, provide both functional protection and enhanced visual appeal, resulting in a low-key yet luxurious appearance. Currently, matte coatings dominate the 3C industry. However, current matte coatings, especially ultra-matte coatings (60° angle: 1~1.5°), require the addition of large amounts of matting agents to adjust the gloss. But coatings with excessive matting agents often suffer from poor transparency, fogging, whitening, and poor scratch resistance. Therefore, during actual post-processing, transportation, and use, the coating surface is easily scratched by hard objects, disrupting the matting agent particle arrangement. The scratched areas become more glossy, leaving "gloss marks" on the surface, severely affecting the aesthetics and user experience.

[0003] Currently, many products on the market require CNC machining after the coating is applied. To prevent scratches during CNC machining, a protective ink or adhesive layer needs to be sprayed on before CNC machining to protect the coating layer. However, this process involves many steps and is costly. Therefore, the development of a scratch-resistant matte coating that does not require the application of protective oil is urgently needed in the market.

[0004] In addition, after 3C electronic products are assembled, they are usually protected with plastic bags or films before being put into product packaging boxes to prevent the appearance of the product from being scratched during transportation. However, as people’s awareness of environmental protection increases, major brand manufacturers are also gradually eliminating plastic inner packaging, thus requiring the product coating surface to have a good scratch resistance.

[0005] Based on the aforementioned market situation, there is an urgent need to develop a water-based ultra-matte coating with excellent scratch resistance to meet market demand. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to overcome the deficiencies and defects mentioned in the background art above, and to provide a scratch-resistant water-based dual-curing ultra-matte coating, its preparation method and application, so as to solve the problem that existing water-based matte coatings are easily scratched and shiny.

[0007] To solve the above-mentioned technical problems, the technical solution proposed by this invention is as follows:

[0008] A scratch-resistant waterborne dual-curing ultra-matte coating is composed of component A and component B. The raw materials for preparing component A include the following components by weight: 60-70 parts of waterborne dual-curing polyurethane acrylate resin, 10-15 parts of matting agent, 3-4 parts of photoinitiator, 2-3 parts of hydroxyl-modified polysiloxane emulsion, and 5-20 parts of water; the matting agent is a nano-silica aqueous dispersion; component B includes a waterborne isocyanate curing agent.

[0009] As a further improvement, the raw materials for preparing component A also include: 0.4-0.8 parts of thickener, 0.1-0.2 parts of defoamer, 1.0-2.0 parts of substrate wetting agent, 0.2-0.4 parts of dispersant, and 2-3 parts of cosolvent.

[0010] As a further improvement, the waterborne dual-curing polyurethane acrylate resin has a hydroxyl value of 40~46 mgKOH / g and a functionality of 4~6.

[0011] As a further improvement, the waterborne dual-curing polyurethane acrylate resin uses Sidon's new material QDSRAYS UV601.

[0012] As a further improvement, the particle size of the nano-silica aqueous dispersion is 10~20nm.

[0013] As a further improvement, the nano-silica aqueous dispersion uses MOS-6010 from Peiten Materials Technology.

[0014] As a further improvement, the hydroxyl-modified polyorganosiloxane emulsion contains active hydroxyl groups at both ends, which can crosslink with isocyanates.

[0015] As a further improvement, the hydroxyl-modified polyorganosiloxane emulsion uses Chuying New Materials Technology M-3062B.

[0016] The present invention also provides a method for preparing the scratch-resistant waterborne dual-curing ultra-matte coating, characterized in that the preparation of component A includes: mixing waterborne dual-curing polyurethane acrylate resin, thickener, defoamer, substrate wetting agent, dispersant, matting agent, photoinitiator, hydroxyl-modified polyorganosiloxane emulsion, cosolvent, and water to obtain component A.

[0017] The present invention also provides an application of the aforementioned scratch-resistant water-based dual-curing ultra-matte coating in the preparation of coatings for 3C electronic products.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] In this invention, a dual-curing polyurethane acrylate resin is combined with a nano-silica aqueous dispersion and a hydroxyl-modified polyorganosiloxane emulsion in appropriate proportions, and an appropriate amount of waterborne isocyanate curing agent is added to prepare a dual-curing coating. This coating combines the toughness and excellent adhesion of PU coatings with the high crosslinking density and excellent abrasion resistance and chemical resistance of UV coatings. By combining the nano-silica aqueous dispersion and the hydroxyl-modified polyorganosiloxane emulsion, the coating effectively encapsulates and fixes the nano-silica particles, resulting in good film thickness, hardness, surface scratch resistance, and film transparency. This solves the appearance defects of current matte coatings on the market, such as poor surface scratch resistance, poor transparency, haziness, whitening, and poor abrasion resistance, which occur after adding a large amount of matting agent.

[0020] The coating prepared by this invention exhibits no significant scratches after 100 five-finger scratch tests at a 60° gloss angle >0.8°. Therefore, it solves the practical problems of requiring protective ink or adhesive to be sprayed before CNC machining for matte coatings, and the ease with which products are scratched and shiny during transportation and use after major brands have removed their plastic inner packaging. This reduces production, processing, and packaging costs, and greatly improves the decorative effect and protective properties of the coating.

[0021] The coating formed by this invention has a fast drying and curing speed, which is beneficial to improving production efficiency. Furthermore, the use of water as a diluent effectively reduces the VOC content in the coating, making the coating pollution-free during spraying and greatly improving the construction environment; thus, it is a green and environmentally friendly product. Moreover, the coating system is simple to prepare, readily available, and widely applicable. Detailed Implementation

[0022] To facilitate understanding of the present invention, the present invention will be described more fully and in detail below with reference to preferred embodiments, but the scope of protection of the present invention is not limited to the following specific embodiments.

[0023] Unless otherwise defined, all technical terms used herein have the same meaning as commonly understood by those skilled in the art. The technical terms used herein are for the purpose of describing particular embodiments only and are not intended to limit the scope of the invention.

[0024] Unless otherwise specified, all raw materials, reagents, instruments and equipment used in this invention can be purchased from the market or prepared by existing methods.

[0025] In some specific embodiments, the scratch-resistant waterborne dual-curing ultra-matte coating of the present invention is composed of component A and component B. The raw materials for preparing component A include the following components in parts by weight: 60-70 parts of waterborne dual-curing polyurethane acrylate resin, 0.4-0.8 parts of thickener, 0.1-0.2 parts of defoamer, 1.0-2.0 parts of substrate wetting agent, 0.2-0.4 parts of dispersant, 10-15 parts of matting agent, 3-4 parts of photoinitiator, 2-3 parts of hydroxyl-modified polyorganosiloxane emulsion, 2-3 parts of cosolvent, and 5-20 parts of water.

[0026] Preferably, the raw materials for preparing component A include the following components by weight: 65 parts of waterborne dual-curing polyurethane acrylate resin, 0.5 parts of thickener, 0.2 parts of defoamer, 2 parts of substrate wetting agent, 0.3 parts of dispersant, 12 parts of nano silica aqueous dispersion, 4 parts of photoinitiator, 3 parts of hydroxyl-modified polyorganosiloxane emulsion, 3 parts of cosolvent, and 10 parts of water.

[0027] In some embodiments, the waterborne dual-curing polyurethane acrylate resin is a novel dual-curing waterborne polyurethane acrylate that can be cured by both UV light and isocyanate curing agent. Specifically, it can use Sidon New Materials QDSRAYS UV601 resin with a solid content of 40~45wt%, a hydroxyl value of 43 mgKOH / g, and a functionality of 4~6.

[0028] This waterborne dual-curing polyurethane acrylate resin is the main component of the formulation, possessing the dual-curing characteristics of both PU and UV resins. It exhibits the toughness and excellent adhesion of PU coatings while combining the high crosslinking density and superior abrasion and chemical resistance of UV coatings. With a hydroxyl value of 43 mgKOH / g and a functionality of 4-6, it is activated by a photoinitiator under UV light to generate free radicals and cations, initiating chain initiation. This triggers polymerization and crosslinking reactions in the prepolymer within the resin. The polymerized macromolecules continue to undergo three-dimensional crosslinking reactions. When the free radical reaction is completely deactivated, the chain terminates, forming a three-dimensional network polymer. The resin also contains hydroxyl groups that react with the isocyanate curing agent in component B to form a three-dimensional network structure, providing a highly abrasion-resistant cured coating. It exhibits excellent adhesion to metals and plastics without the need for a substrate treatment agent.

[0029] In some embodiments, the thickener is an aqueous nonionic polyurethane associative thickener with pseudoplastic fluid flow characteristics, specifically one of Wanhua Chemical's Vesmody U505 or U300.

[0030] In some embodiments, the defoamer is a polyether-based siloxane defoamer, specifically Teco Foamex 810.

[0031] In some embodiments, the substrate wetting agent is a modified polyether siloxane copolymer, specifically one of BYK333 or BYK347.

[0032] In some embodiments, the dispersant is a nonionic modified fatty acid derivative solution, specifically TEGO® Dispers 740 W.

[0033] In some embodiments, the matting agent is a nano-silica aqueous dispersion, specifically MOS-6010 from Peiten Materials Technology, with an average particle size of 12 nm and a solid content of 28-35 wt%.

[0034] The formulation incorporates an appropriate amount of nano-silica aqueous dispersion with a particle size between 10-20 nm. The nano-sized silica particles within this dispersion undergo surface modification, resulting in good compatibility with organic resin emulsions. Simultaneously, the dispersion participates in chemical cross-linking reactions, forming a three-dimensional network inorganic framework structure after curing, thereby improving the hardness of the paint film. Furthermore, its nano-sized particles allow for the formation of uniform and dense scattering centers within the coating, effectively enhancing light scattering and significantly improving the matting effect. Compared to traditional matting agents, nano-silica matting agents achieve superior matting results with lower dosages. While enhancing the matting effect, it minimizes interference with coating transparency. Because its nano-sized particles primarily scatter light outside the visible light range, it has minimal impact on visible light transmittance, ensuring good coating transparency and preventing issues such as fogging or whitening.

[0035] In some embodiments, the photoinitiator is one of cleavable acylphosphine oxides, cleavable hydrogen-abstracting types, and cleavable α-hydroxy ketone derivatives.

[0036] In some embodiments, the hydroxyl-modified polyorganosiloxane emulsion is an emulsion containing active hydroxyl groups (R·C-OH) at both ends and capable of crosslinking with isocyanate, specifically Chuying New Material Technology M-3062B, which has a solid content of 70-76wt% and a hydroxyl value of 40 mgKOH / g.

[0037] The hydroxyl-modified polyorganosiloxane emulsion contains active hydroxyl groups at both ends, which can participate in the cross-linking reaction with component B isocyanate to improve the cross-linking degree and hardness of the coating film. Its important role is to fix the nano silica particles on the coating surface to prevent them from being damaged and scraped off by external forces, thereby improving scratch resistance and preventing the "glossy" defect on the coating surface. In addition, it has a certain matting effect and can reduce the amount of matting agent used.

[0038] In some embodiments, the co-solvent is an alcohol ether solvent, one or more of diethylene glycol butyl ether, dipropylene glycol butyl ether, dipropylene glycol methyl ether, and propylene glycol methyl ether.

[0039] In some specific embodiments, the preparation method of component A of the anti-scratch waterborne dual-curing ultra-matte coating of the present invention involves mixing the above-mentioned waterborne dual-curing polyurethane acrylate resin, thickener, defoamer, substrate wetting agent, dispersant, matting agent, photoinitiator, hydroxyl-modified polyorganosiloxane emulsion, cosolvent, and water in parts by weight.

[0040] In some embodiments, the following steps are specifically included:

[0041] S1. While stirring at a speed of 700-900 rpm, add thickener, substrate wetting agent and dispersant sequentially to waterborne dual-curing polyurethane acrylate resin.

[0042] S2. Add matting agent while stirring at a speed of 800-1000 rpm, and stir for 10-15 minutes until the fineness is dispersed to <10μm.

[0043] S3. While stirring at a speed of 800-1000 rpm, add the photoinitiator, hydroxyl-modified polyorganosiloxane emulsion, co-solvent, and water in sequence, mix well, and filter to obtain the final product.

[0044] In some specific embodiments, component B of the scratch-resistant waterborne dual-curing ultra-matte coating of the present invention includes a curing agent and a solvent, wherein the curing agent accounts for 80-90% by mass. The curing agent is preferably a waterborne isocyanate curing agent, such as an HDI aliphatic polyisocyanate curing agent, and the solvent can be propylene glycol diacetate.

[0045] In some specific embodiments, the present invention also provides the application of the above-mentioned scratch-resistant water-based dual-curing ultra-matte coating on plastic materials and metal substrates. The application method includes: mixing component A and component B and diluting with deionized water (the preferred mass ratio of the three is 100:6~10:10~20), stirring and filtering, and then spraying the mixture onto the surface of the substrate. After curing, a coating with a film thickness of 10-15 μm can be obtained.

[0046] In some embodiments, the spraying air pressure is 3–5 kgf / cm². 2 The spraying environment temperature is 20-30℃ and the humidity is 40-60%RH.

[0047] In some embodiments, curing includes three stages: baking curing, UV curing, and further baking. The baking curing temperature is 60–70°C, the time is 10–15 minutes, and the UV energy is 800–1200 mJ / cm². 2 80~120mw / cm 2 After removing from the production line, bake at 65~75℃ for 2~3 hours or at room temperature (22~28℃) for 5 days.

[0048] This invention effectively solves the appearance defects of current matte coatings on the market, such as poor surface scratch resistance, hazy appearance, and lack of resistance to friction and shine, which are caused by the addition of large amounts of matting agents. Products using the coating of this invention have excellent scratch resistance and abrasion resistance. Before CNC machining, there is no need to spray protective ink or adhesive to protect the product during processing. Furthermore, finished products do not require separate packaging with plastic bags or films, reducing production, processing, and packaging costs and environmental pollution. In addition, it increases the product's durability in actual use and improves the consumer experience.

[0049] The following examples are for illustrative purposes only and do not limit the scope of protection of the present invention.

[0050] Example 1

[0051] The scratch-resistant water-based dual-curing ultra-matte coating of this embodiment comprises, in component A, the following components by weight (Table 1):

[0052] Table 1

[0053]

[0054] The preparation method of component A includes the following steps:

[0055] S1. While stirring, add the thickener to the water-based dual-curing polyurethane acrylate resin at a stirring speed of 800 rpm to obtain mixture A;

[0056] S2. The stirring speed is 800 rpm. While stirring, add defoamer, substrate wetting agent and dispersant to mixture A and mix evenly to obtain mixture B.

[0057] S3. Stir at 1000 rpm, add matting agent to mixture B while stirring, disperse until fineness <10μm, to obtain mixture C;

[0058] S4. The stirring speed is 800 rpm. While stirring, the photoinitiator is added to the mixture C to obtain mixture D.

[0059] S5. Stirring speed is 800 rpm. While stirring, add hydroxyl-modified polyorganosiloxane emulsion to mixture D to obtain mixture E.

[0060] S6. Stir at 800 rpm, add co-solvent and water to mixture E while stirring, mix well, and filter through a 300-mesh sieve to obtain component A.

[0061] The composition of component B in this embodiment is: 85 parts of HDI aliphatic polyisocyanate curing agent and 15 parts of propylene glycol diacetate.

[0062] The preparation method of component B above includes the following steps:

[0063] S1: Pour the HDI aliphatic polyisocyanate curing agent into the container and add propylene glycol diacetate solvent while stirring at 800 rpm.

[0064] S2: After stirring continuously for 5 minutes, filter through a 300-mesh filter to obtain component B.

[0065] Example 2

[0066] The scratch-resistant water-based dual-curing ultra-matte coating of this embodiment comprises, in component A, the following components by weight (Table 2):

[0067] Table 2

[0068]

[0069] The preparation method of component A is the same as that in Example 1. Component B is the same as that in Example 1.

[0070] Example 3

[0071] The scratch-resistant water-based dual-curing ultra-matte coating of this embodiment comprises, in component A, the following components by weight (Table 3):

[0072] Table 3

[0073]

[0074] The preparation method of component A is the same as that in Example 1. Component B is the same as that in Example 1.

[0075] Comparative Example 1

[0076] Based on Example 1, the amount of hydroxyl-modified polyorganosiloxane emulsion added was reduced to below the addition range.

[0077] The coating of this comparative example, component A includes the following components by weight (Table 4):

[0078] Table 4

[0079]

[0080] The preparation method of component A is the same as that in Example 1. Component B is the same as that in Example 1.

[0081] Comparative Example 2

[0082] Based on Example 1, the amount of hydroxyl-modified polyorganosiloxane emulsion was increased to a level higher than the specified range.

[0083] The coating of this comparative example, component A includes the following components by weight (Table 5):

[0084] Table 5

[0085]

[0086] The preparation method of component A is the same as that in Example 1. Component B is the same as that in Example 1.

[0087] Comparative Example 3

[0088] Based on Example 1, the nano-silica aqueous dispersion matting agent was replaced with Tosoh E-1011 silica matting powder with an average particle size of 1.5 μm.

[0089] The coating of this comparative example, component A includes the following components by weight (Table 6):

[0090] Table 6

[0091]

[0092] The preparation method of component A above includes the following steps:

[0093] S1. While stirring, add the thickener to the water-based dual-curing polyurethane acrylate resin at a stirring speed of 800 rpm to obtain mixture A;

[0094] S2. The stirring speed is 800 rpm. While stirring, add defoamer, substrate wetting agent and dispersant to mixture A and mix evenly to obtain mixture B.

[0095] S3. Stir at 1000 rpm, add E-1011 silica matting powder to mixture B while stirring, disperse until fineness <15μm, to obtain mixture C;

[0096] S4. The stirring speed is 800 rpm. While stirring, the photoinitiator is added to the mixture C to obtain mixture D.

[0097] S5. Stirring speed is 800 rpm. While stirring, add hydroxyl-modified polyorganosiloxane emulsion to mixture D to obtain mixture E.

[0098] S6. Stir at 800 rpm, add co-solvent and water to mixture E while stirring, mix well, and filter through a 200-mesh sieve to obtain component A.

[0099] Component B is the same as in Example 1.

[0100] Comparative Example 4

[0101] Based on Comparative Example 3, the amount of hydroxyl-modified polyorganosiloxane emulsion used was increased.

[0102] The coating of this comparative example, component A includes the following components by weight (Table 7):

[0103] Table 7

[0104]

[0105] The preparation method of component A is the same as that of Comparative Example 3. Component B is the same as that of Example 1.

[0106] Comparative Example 5

[0107] Based on Comparative Example 4, the amount of hydroxyl-modified polyorganosiloxane emulsion used was increased.

[0108] The coating of this comparative example, component A includes the following components by weight (Table 8):

[0109] Table 8

[0110]

[0111] The preparation method of component A is the same as that of Comparative Example 3. Component B is the same as that of Example 1.

[0112] In Examples 1-3 and Comparative Examples 1-5, components A and B of the coating and deionized water were diluted and mixed at a mass ratio of 100:8:10-20. The mixture was stirred at 300 rpm for 3 minutes, filtered through a 300-mesh filter, and then sprayed onto the surface of a plastic or metal substrate that had been wiped with alcohol. The film thickness was controlled at 10-15 μm, and the substrate was baked at 60°C for 10 minutes with a UV energy of 1000 mJ / cm². 2 100mw / cm 2 After curing, bake at 70 degrees Celsius for 2 hours after removal from the production line to obtain a completely dry coating.

[0113] The coatings formed by the coatings of Examples 1-3 and Comparative Examples 1-5 were subjected to performance tests, and the results are shown in Table 9.

[0114] Table 9

[0115]

[0116] As shown in Table 9 above, Example 3 exhibits the best overall performance. Its adhesion to water at 85 degrees Celsius for 2 hours remains stable at Grade 0. Its gloss of 0.9° meets the requirements for ultra-matte gloss. It shows no scratches at a pencil hardness of 500g / 2H. It shows no substrate exposure after 350 RCA abrasion tests. It shows no obvious scratches after 100 finger scratch tests. It shows no blistering or discoloration after high temperature and high humidity ring testing. Its adhesion does not decrease and can reach Grade 0 standard.

[0117] Through comparative verification of the addition amounts of different hydroxyl-modified polysiloxane emulsions in Examples 1-3 above, it was found that under the premise of consistent addition of nano-silica aqueous dispersion, when the addition amount of hydroxyl-modified polysiloxane emulsion within the parameter range is gradually increased, both hardness and RCA are improved. Hardness, RCA, and finger scratch resistance performance are increased, gloss is decreased, and five-finger scratch test is qualified. Through comparative verification of the addition amounts of different hydroxyl-modified polysiloxane emulsions in Comparative Examples 1 and 2, it was found that when the addition amount is lower than the parameter range (Comparative Example 1), hardness, RCA, and finger scratch resistance performance decrease, gloss increases, and the five-finger scratch test is NG. Conversely, when the addition amount of hydroxyl-modified polysiloxane emulsion is higher than the parameter range (Comparative Example 2), hardness, RCA, and finger scratch resistance performance increase, the five-finger scratch test is qualified, but the water boiling adhesion test decreases. This indicates that hydroxyl-modified polysiloxane emulsion has a significant fixing and encapsulating effect on nano-silica and enhances the overall hardness of the coating.

[0118] In Comparative Examples 3, 4, and 5, the matting agent in the nano-silica aqueous dispersion was replaced with ordinary silica matting powder (E-1011, Tosoh, with a particle size of 1.5 μm). Simultaneously, comparative verification was conducted using different dosages of hydroxyl-modified polysiloxane emulsions. The results showed that when the dosage of the hydroxyl-modified polysiloxane emulsion was within the parameter range (Comparative Examples 3 and 4), compared to Examples 1-3 and Comparative Examples 1-2, the appearance was hazy and the transparency was poor, with decreased hardness, RCA, and finger scratch resistance. When the dosage of the hydroxyl-modified polysiloxane emulsion was higher than the parameter range (Comparative Example 5), the hardness, RCA, and finger scratch resistance increased, but the five-finger scratch test failed and the water-boiling adhesion test decreased. This indicates that ordinary matting powder is inferior to nano-silica aqueous dispersions in terms of scratch resistance and transparency. Meanwhile, as the proportion of hydroxyl-modified polysiloxane emulsion increases, the hardness, RCA, and finger scratch resistance test performance improve, indicating that the hydroxyl-modified polysiloxane emulsion has a significant fixing and encapsulating effect on nano-silica and enhances the overall hardness of the coating.

[0119] Based on the above examples and comparative examples, the scratch-resistant water-based dual-curing ultra-matte coating of the present invention, with component A being water-based dual-curing polyurethane acrylate resin combined with nano-silica aqueous dispersion, hydroxyl-modified polyorganosiloxane emulsion, and auxiliary agents and solvents such as wetting agents / dispersants / defoamers, and component B being appropriately combined with HDI aliphatic polyisocyanate curing agent, can effectively solve the technical problems of ultra-matte gloss (60° angle: 1-1.5°) surfaces being easily scratched, not scratch-resistant, shiny, and having poor transparency.

[0120] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any way. Therefore, any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention should fall within the protection scope of the present invention.

Claims

1. A scratch-resistant water-based dual-curing ultra-matte coating, comprising component A and component B, characterized in that, The raw materials for preparing component A include the following components by weight: 60-70 parts of waterborne dual-curing polyurethane acrylate resin, 10-15 parts of matting agent, 3-4 parts of photoinitiator, 2-3 parts of hydroxyl-modified polysiloxane emulsion, and 5-20 parts of water; the matting agent is a nano-silica aqueous dispersion; component B includes a waterborne isocyanate curing agent; the hydroxyl-modified polysiloxane emulsion uses Chuying New Material Technology M-3062B.

2. The scratch-resistant water-based dual-curing ultra-matte coating according to claim 1, characterized in that, The raw materials for preparing component A also include: 0.4-0.8 parts of thickener, 0.1-0.2 parts of defoamer, 1.0-2.0 parts of substrate wetting agent, 0.2-0.4 parts of dispersant, and 2-3 parts of cosolvent.

3. The scratch-resistant water-based dual-curing ultra-matte coating according to claim 1 or 2, characterized in that, The waterborne dual-curing polyurethane acrylate resin has a hydroxyl value of 40~46 mgKOH / g and a functionality of 4~6.

4. The scratch-resistant water-based dual-curing ultra-matte coating according to claim 3, characterized in that, The waterborne dual-curing polyurethane acrylate resin used is Sidon New Materials QDSRAYS UV601.

5. The scratch-resistant water-based dual-curing ultra-matte coating according to claim 1 or 2, characterized in that, The particle size of the nano-silica aqueous dispersion is 10~20nm.

6. The scratch-resistant water-based dual-curing ultra-matte coating according to claim 5, characterized in that, The nano-silica aqueous dispersion uses MOS-6010 from Peiten Materials Technology.

7. A method for preparing the scratch-resistant water-based dual-curing ultra-matte coating according to any one of claims 1 to 6, characterized in that, The preparation of component A includes: mixing waterborne dual-curing polyurethane acrylate resin, thickener, defoamer, substrate wetting agent, dispersant, matting agent, photoinitiator, hydroxyl-modified polyorganosiloxane emulsion, cosolvent, and water to obtain component A.

8. The application of the scratch-resistant water-based dual-curing ultra-matte coating according to any one of claims 1 to 6 in the preparation of coatings for 3C electronic products.

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