Antifouling and antibacterial imitation ceramic coating and preparation method thereof

Abstract

The present invention relates to the field of coating technology, specifically disclosing an antifouling and antibacterial ceramic-like coating and its preparation method. The antifouling and antibacterial ceramic-like coating comprises the following components by mass percentage: 30%-40% UV-curable fingerprint-friendly fluorine-containing resin, 25%-30% UV-curable hybrid silicone-fluorine polyurethane acrylate, 8%-12% tripropylene glycol diacrylate, 2%-4% neopentyl glycol diacrylate, 3%-6% photoinitiator, 3%-5% dispersant, 3%-5% nano-silicon carbide, 1%-2% nano-zinc oxide, 1%-2% eugenol, 1%-2% terpineol, 2%-3% cyclohexanone, and 10%-20% organic solvent. The antifouling and antibacterial ceramic-like coating of the present application has excellent antifouling and antibacterial capabilities.

Description

Technical Field

[0001] The present invention relates to the technical field of coatings, in particular to an antifouling and antibacterial imitation ceramic coating and a preparation method thereof. Background Art

[0002] Imitation ceramic coatings, as an innovative material that combines aesthetics and practicality, have attracted much attention for their high gloss and hardness, as well as their ability to impart a delicate, ceramic-like texture to the surface of objects. In the field of automotive interiors, imitation ceramic coatings can not only significantly enhance the luxury and overall aesthetics of the vehicle interior, but their excellent wear resistance and scratch resistance can also effectively resist the wear and tear of daily use, extending the service life of interior components. Similarly, their application on home appliance casings not only makes the product appearance brighter and more fashionable, but also enhances the surface hardness, reduces scratches caused by daily cleaning or minor collisions, and keeps home appliances looking new for a long time. Existing anti-ceramic coatings are generally cured by high-temperature curing or UV curing. High-temperature curing is often limited by the application scenario, while UV curing has become the preferred choice in many fields due to its high efficiency and environmental protection, especially in today's pursuit of rapid production and energy conservation and emission reduction.

[0003] However, the UV-curable ceramic-like coatings currently in widespread use have a significant drawback: they are easily stained and difficult to clean. Once scratched, their aesthetic appeal is significantly diminished. These issues not only impact the user experience but also limit the further expansion of ceramic-like coatings into the high-end market. More importantly, with the continuous improvement of modern society's quality of life and consumers' increasing pursuit of healthy living, antimicrobial properties are becoming a new focus for frequently touched items, such as automotive interiors and appliance housings. Traditional ceramic-like coatings have mediocre antimicrobial performance, failing to meet the market's high health and safety standards.

[0004] Therefore, the development of a new type of ceramic-like coating with excellent anti-fouling and antibacterial capabilities has become an urgent need in the industry. Summary of the Invention

[0005] To develop a novel ceramic-like coating with excellent antifouling and antibacterial properties, this application provides an antifouling and antibacterial ceramic-like coating and its preparation method. Research has shown that the introduction of specific fluorine-containing resins and hybrid silicone-fluorine polyurethane acrylics significantly improves the coating's antifouling and wear resistance. The addition of nano-zinc oxide, cyclohexanone, eugenol, and terpineol further enhances the coating's antibacterial properties and wear resistance, resulting in a coating that combines antifouling and antibacterial properties with a high-hardness, ceramic-like texture.

[0006] In the first aspect, the present application provides an antifouling and antibacterial ceramic-like coating that adopts the following technical solutions:

[0007] An antifouling and antibacterial imitation ceramic coating comprises the following components in percentage by mass: 30%-40% of a UV-curable fingerprint-easy-cleaning fluorine-containing resin, 25%-30% of a UV-curable hybrid silicone-fluorine polyurethane acrylate, 8%-12% of tripropylene glycol diacrylate, 2%-4% of neopentyl glycol diacrylate, 3%-6% of a photoinitiator, 3%-5% of a dispersant, 3%-5% of nano-silicon carbide, 1%-2% of nano-zinc oxide, 1%-2% of eugenol, 1%-2% of terpineol, 2%-3% of cyclohexanone, and 10%-20% of an organic solvent.

[0008] In the above technical solution, the present application selects UV-curable fingerprint easy-to-clean fluorine-containing resin as the main material of the anti-fouling and antibacterial imitation ceramic coating, which can effectively improve the anti-fouling performance of the coating. The introduction of UV-curable hybrid silicon-fluorine polyurethane acrylic gives the coating good wear resistance, weather resistance and chemical resistance. The introduction of tripropylene glycol diacrylate and neopentyl glycol diacrylate further enhances the hydrophobicity, adhesion and wear resistance of the coating. The introduction of nano-silicon carbide gives the coating a simulated ceramic texture. The addition of nano-zinc oxide, eugenol and terpineol gives the coating a wide range of The wide spectrum of antibacterial properties can effectively inhibit the growth and reproduction of bacteria, enhance the antibacterial effect of the coating; through the addition of cyclohexanone, it promotes the light-induced cross-linking reaction, accelerates the curing speed of the coating, improves the density of the coating, prevents the invasion of microorganisms, and helps the antibacterial ingredients to better disperse and diffuse in the coating, better inhibiting the attachment and reproduction of bacteria; through the synergistic effect of the four ingredients of nano zinc oxide, eugenol, terpineol and cyclohexanone, the coating not only has excellent antibacterial properties, but also can effectively inhibit the attachment, reproduction and invasion of bacteria, thereby achieving the purpose of maintaining long-term surface hygiene.

[0009] Preferably, the mass ratio of tripropylene glycol diacrylate to neopentyl glycol diacrylate is 10:3.

[0010] In the above technical solution, the present application further optimizes the comprehensive performance of the coating by optimizing the usage ratio of tripropylene glycol diacrylate and neopentyl glycol diacrylate, and further improves the glossiness of the coating on the basis of further enhancing the hydrophobicity and adhesion of the coating.

[0011] Preferably, the mass ratio of the nano zinc oxide, eugenol, terpineol and cyclohexanone is 1.5:1.5:2:2.

[0012] In the above technical solution, the present application further enhances the antibacterial properties of the coating by optimizing the dosage ratio of nano-zinc oxide, eugenol, terpineol, and cyclohexanone. At this dosage ratio, nano-zinc oxide, eugenol, and terpineol can effectively improve antibacterial efficiency and more effectively inhibit the growth of various bacteria and fungi. Furthermore, cyclohexanone at this dosage ratio can interact with terpineol, further promoting the uniform dispersion of the antibacterial components in the coating, thereby further enhancing the overall antibacterial effect of the coating.

[0013] Preferably, the dispersant is a mixture of polyethylene glycol diacrylate and hexafluoroisopropanol in a mass ratio of 1:(0.2-0.5).

[0014] In the above technical solution, this application selects polyethylene glycol diacrylate and hexafluoroisopropanol as dispersants for the antifouling and antibacterial ceramic-like coating, which can effectively improve the dispersibility and stability of the coating, thereby ensuring the uniformity of the coating during preparation and use and avoiding possible agglomeration. At the same time, this application optimizes the dosage ratio of polyethylene glycol diacrylate and hexafluoroisopropanol to make the dispersant more effective in the coating, contributing to the long-term stable storage of the coating and improving its application performance.

[0015] Preferably, the photoinitiator is a mixture of 2959 photoinitiator and TPO photoinitiator in a mass ratio of (2-4): (1-2).

[0016] In the above technical solution, this application uses a mixture of 2959 photoinitiator and TPO photoinitiator, which not only improves the curing efficiency of the coating, but also reduces the curing temperature of the coating to a certain extent, so that the coating can maintain good curing performance in a wider temperature range. The synergy with cyclohexanone can further accelerate the curing speed of the coating, shorten the production cycle, ensure that the coating forms a denser network structure during the curing process, ensure the high density of the coating, further improve the wear resistance of the coating, isolate the invasion of bacteria into the coating, and further extend the service life of the product.

[0017] Preferably, the organic solvent is any one of acetone, ethyl acetate, and isopropanol, or a mixture thereof.

[0018] In the above technical solution, the present application selects acetone, ethyl acetate, and isopropyl alcohol as organic solvents, which can effectively improve the solubility and construction performance of the coating.

[0019] Preferably, the particle size of the nano-silicon carbide is 10-50 nm, and the particle size of the nano-zinc oxide is 10-30 nm.

[0020] In the above technical solution, the present application ensures uniform distribution and good adhesion of the filler in the coating by selecting nano-silicon carbide with a particle size of 10-50nm and nano-zinc oxide with a particle size of 10-30nm. The addition of nano-silicon carbide not only gives the coating a texture similar to that of simulated ceramics, but also improves the hardness and wear resistance of the coating. Nano-zinc oxide plays a key role in its antibacterial properties. Its tiny particle size makes it more active, thus exerting a stronger antibacterial effect.

[0021] In a second aspect, the present application provides a method for preparing an antifouling and antibacterial ceramic-like coating using the following technical solutions:

[0022] A method for preparing an antifouling and antibacterial imitation ceramic coating comprises the following steps:

[0023] Step 1: Mix the UV-curable fingerprint easy-to-clean fluorine-containing resin and 25%-30% UV-curable hybrid silicone-fluorine polyurethane acrylic and stir until uniformly dispersed to obtain material 1; mix cyclohexanone, nano zinc oxide, eugenol, and terpineol until uniformly dispersed to obtain material 2;

[0024] Step 2: Add tripropylene glycol diacrylate, neopentyl glycol diacrylate, photoinitiator, dispersant, nano-silicon carbide, and material 2 to the organic solvent in sequence, stir until mixed evenly, then add material 1 and fully disperse to obtain an antifouling and antibacterial imitation ceramic coating.

[0025] In the above technical solution, the present application ensures that various ingredients can be fully mixed and evenly formed by selecting specific raw materials and preparation processes to form a uniform imitation ceramic coating, thereby ensuring the excellent performance of the imitation ceramic coating.

[0026] In summary, this application includes at least one of the following beneficial technical effects:

[0027] 1. This application selects UV-curable fingerprint-resistant and easy-to-clean fluorine-containing resin and UV-curable hybrid silicone-fluorine polyurethane acrylic as the main ingredients of the anti-fouling and antibacterial ceramic-like coating, which can effectively improve the anti-fouling performance, wear resistance, weather resistance and chemical resistance of the coating, ensuring the long-term stability and aesthetics of the coating.

[0028] 2. This application enhances the hydrophobicity, adhesion and wear resistance of the antifouling and antibacterial ceramic-like coating by adding tripropylene glycol diacrylate and neopentyl glycol diacrylate, so that the coating has a self-cleaning effect and is not easy to be stained, scratched or leave fingerprints.

[0029] 3. This application ensures the simulated ceramic texture of the coating and improves the aesthetics of the coating by introducing nano-silicon carbide.

[0030] 4. This application imparts broad-spectrum antibacterial properties to the coating by adding nano-zinc oxide, eugenol, and terpineol. The addition of cyclohexanone improves the density of the coating, prevents the invasion of microorganisms, and helps the antibacterial ingredients to be better dispersed and diffused in the coating. Through the synergistic effect of the four ingredients of nano-zinc oxide, eugenol, terpineol, and cyclohexanone, the coating not only has excellent antibacterial properties, but also can effectively inhibit the attachment, reproduction, and invasion of bacteria, thereby achieving the purpose of maintaining long-term surface hygiene.

[0031] 5. The antifouling and antibacterial ceramic-like coating provided herein exhibits excellent antifouling, antibacterial, and wear resistance, meeting the high health and safety standards of modern consumers. Furthermore, the antifouling and antibacterial ceramic-like coating provided herein exhibits rapid curing, environmental friendliness, and energy conservation, making it suitable for application in high-end markets such as automotive interiors and appliance housings. DETAILED DESCRIPTION

[0032] In order to better illustrate the purpose, technical solutions and advantages of the present invention, the present invention will be further described below in conjunction with specific embodiments.

[0033] Example 1

[0034] An antifouling and antibacterial imitation ceramic coating comprises 30 kg of UV-curable fluorine-containing easy-to-clean resin, 30 kg of UV-curable inorganic hybrid silicone resin, 9 kg of tripropylene glycol diacrylate, 2 kg of neopentyl glycol diacrylate, 4 kg of photoinitiator, 3 kg of dispersant, 4 kg of nano-silicon carbide, 2 kg of nano-zinc oxide, 1 kg of eugenol, 1.5 kg of terpineol, 2 kg of cyclohexanone, and 11.5 kg of organic solvent.

[0035] Among them, the UV-curable fluorine-containing easy-to-clean resin is DSP-552F from Xiamen Aikema Chemical Co., Ltd.

[0036] Among them, the UV-curable inorganic hybrid silicone resin is UV-9828 hybrid silicone-fluorine polyurethane acrylic produced by Dongguan Inoue New Materials Development Co., Ltd.

[0037] Among them, tripropylene glycol diacrylate is TPGDA from Guangzhou Yuanchuang Chemical Co., Ltd.

[0038] Among them, neopentyl glycol diacrylate is NPGDA from Jiangsu Minglin Chemical Technology Co., Ltd.

[0039] The photoinitiator is a mixture of 2959 photoinitiator and TPO photoinitiator in a mass ratio of 2:1.

[0040] Among them, 2959 photoinitiator is IGM 2959 photoinitiator.

[0041] Wherein, the TPO photoinitiator is IGM TPO photoinitiator.

[0042] The dispersant is a mixture of polyethylene glycol diacrylate and hexafluoroisopropanol in a mass ratio of 1:0.2.

[0043] Among them, polyethylene glycol diacrylate is PEG(200)DA from Guangdong Yingtai New Materials Co., Ltd.

[0044] Among them, hexafluoroisopropanol comes from Maoming Xiongda Chemical Co., Ltd.

[0045] Among them, nano silicon carbide is from Shandong Jinmeng New Materials Co., Ltd., and its particle size is between 10-50nm.

[0046] Among them, nano zinc oxide is from Dongguan Tongyuan Chemical Co., Ltd., and its particle size is between 10-30nm.

[0047] Among them, eugenol comes from Xiamen Zhongnong Science and Technology New Materials Co., Ltd.

[0048] Among them, terpineol comes from Shandong Guohua Chemical Co., Ltd.

[0049] Among them, cyclohexanone is from Guangzhou Xinyang Chemical Co., Ltd.

[0050] Among them, the organic solvent is ethyl acetate, which is from Foshan Changxing New Materials Co., Ltd.

[0051] In this embodiment, a method for preparing an antifouling and antibacterial ceramic-like coating is also provided, which specifically adopts the following steps:

[0052] Step 1: Mix the UV-curable fingerprint easy-to-clean fluorine-containing resin and the UV-curable hybrid silicone-fluorine polyurethane acrylic, and stir until uniformly dispersed to obtain material 1; mix cyclohexanone, nano zinc oxide, eugenol, and terpineol until uniformly dispersed to obtain material 2.

[0053] Step 2: Add tripropylene glycol diacrylate, neopentyl glycol diacrylate, photoinitiator, dispersant, and nano-silicon carbide to ethyl acetate in sequence, stir until mixed evenly, then add material 2, fully disperse, add material 1, and stir until completely mixed evenly to obtain an antifouling and antibacterial imitation ceramic coating.

[0054] Example 2

[0055] An antifouling and antibacterial imitation ceramic coating, which differs from Example 1 in that it comprises 35 kg of UV-curable fluorine-containing easy-to-clean resin, 25 kg of UV-curable inorganic hybrid silicone resin, 8 kg of tripropylene glycol diacrylate, 4 kg of neopentyl glycol diacrylate, 4.5 kg of photoinitiator, 3 kg of dispersant, 3 kg of nano-silicon carbide, 1 kg of nano-zinc oxide, 1.5 kg of eugenol, 1 kg of terpineol, 3 kg of cyclohexanone, and 11 kg of organic solvent.

[0056] The photoinitiator is a mixture of 2959 photoinitiator and TPO photoinitiator in a mass ratio of 3:1.5.

[0057] The dispersant is a mixture of polyethylene glycol diacrylate and hexafluoroisopropanol in a mass ratio of 1:0.5.

[0058] Example 3

[0059] An antifouling and antibacterial imitation ceramic coating, which differs from Example 1 in that it comprises 30 kg of UV-curable fluorine-containing easy-to-clean resin, 25 kg of UV-curable inorganic hybrid silicone resin, 10 kg of tripropylene glycol diacrylate, 3 kg of neopentyl glycol diacrylate, 5 kg of photoinitiator, 4 kg of dispersant, 5 kg of nano-silicon carbide, 1.5 kg of nano-zinc oxide, 1.5 kg of eugenol, 2 kg of terpineol, 2 kg of cyclohexanone, and 11 kg of organic solvent.

[0060] The photoinitiator is a mixture of 2959 photoinitiator and TPO photoinitiator in a mass ratio of 4:1.

[0061] The dispersant is a mixture of polyethylene glycol diacrylate and hexafluoroisopropanol in a mass ratio of 1:0.4.

[0062] Example 4

[0063] An antifouling and antibacterial imitation ceramic coating, which is different from Example 1 in that the dispersant is Lubrizol SOLSPERSE 24000 dispersant.

[0064] Comparative Example 1

[0065] An antifouling and antibacterial imitation ceramic coating is different from Example 1 in that tripropylene glycol diacrylate is replaced by trimethylolpropane triacrylate in equal amounts.

[0066] Comparative Example 2

[0067] An antifouling and antibacterial imitation ceramic coating is different from Example 1 in that an equal amount of neopentyl glycol diacrylate is replaced by hexanediol diacrylate.

[0068] Comparative Example 3

[0069] An antifouling and antibacterial imitation ceramic coating is different from Example 1 in that an equal amount of nano zinc oxide is replaced by nano silver oxide, and the particle size is between 10-30 nm.

[0070] Comparative Example 4

[0071] An antifouling and antibacterial imitation ceramic coating is different from Example 1 in that equal amounts of eugenol and terpineol are replaced by nano silver oxide.

[0072] Comparative Example 5

[0073] An antifouling and antibacterial imitation ceramic coating is different from Example 1 in that an equal amount of cyclohexanone is replaced by acetone.

[0074] Performance testing:

[0075] In order to verify the performance of the antifouling and antibacterial ceramic coating of the present application, the following performance tests were conducted on the coating samples of Examples 1 to 4 and Comparative Examples 1 to 5:

[0076] The pencil hardness of the ceramic-like coating was tested according to GB / T 6739-2022; the adhesion of the ceramic-like coating (PP substrate) was tested according to GB / T 9286-1998; the abrasion resistance of the ceramic-like coating was tested according to GB / T 1768-1979 (250g weight, rubber grinding wheel, 100r cycle test); and the antibacterial rate of the ceramic-like coating against Staphylococcus aureus and Escherichia coli was tested according to GB / T 21866-2008. Three pollutants, soy sauce, coffee, and oily handwriting, were added to the surface of the ceramic-like coating. After 24 hours, the coating was wiped with a dust-free cloth to observe the removal of the pollutants and evaluate the anti-fouling ability.

[0077] The above test results are shown in Tables 1 and 2.

[0078] Table 1:

[0079]

[0080]

[0081] Table 2:

[0082]

[0083]

[0084] The experimental results of the coating samples of Examples 1 to 4 and Comparative Examples 1 to 5 were analyzed. The coating samples of Examples 1 to 4 performed well in terms of pencil hardness, adhesion, wear resistance, antibacterial rate and decontamination. It can be seen that the imitation ceramic coatings of the embodiments of the present application have good anti-fouling, antibacterial and wear resistance.

[0085] Specifically analyzing Example 1 and Comparative Examples 1 to 2, the difference between Comparative Example 1 and Example 1 is that Comparative Example 1 does not use tripropylene glycol diacrylate, and the difference between Comparative Example 2 and Example 1 is that Comparative Example 2 does not use neopentyl glycol diacrylate. Example 1 performs well in adhesion, wear resistance and decontamination performance. Therefore, it can be seen that further introducing tripropylene glycol diacrylate and neopentyl glycol diacrylate into the imitation ceramic coating of the present application can further enhance the adhesion, wear resistance and decontamination ability of the coating.

[0086] Specifically analyzing Example 1 and Comparative Examples 3 to 5, Comparative Examples 3 and 4, compared to Example 1, replaced nano-zinc oxide, eugenol, and terpineol with nano-silver oxide, respectively, and Comparative Example 5 replaced cyclohexanone with acetone. Example 1 performed well in terms of antibacterial and wear resistance. This demonstrates that nano-zinc oxide, eugenol, and terpineol play a key role in the ceramic-like coating of this application, and their presence is crucial for improving the antibacterial properties of the coating. The addition of cyclohexanone promotes the uniform dispersion of the antibacterial components and increases the density of the coating, thereby improving the wear resistance of the coating and preventing microbial invasion.

[0087] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but as long as they are within the scope of the claims of the present application, they are protected by the patent law.

Claims

1. An antifouling and antibacterial imitation ceramic coating, characterized in that: The invention comprises the following components in percentage by mass: 30%-40% UV-curable fingerprint easy-to-clean fluorine-containing resin, 25%-30% UV-curable hybrid silicone-fluorine polyurethane acrylate, 8%-12% tripropylene glycol diacrylate, 2%-4% neopentyl glycol diacrylate, 3%-6% photoinitiator, 3%-5% dispersant, 3%-5% nano-silicon carbide, 1%-2% nano-zinc oxide, 1%-2% eugenol, 1%-2% terpineol, 2%-3% cyclohexanone, and 10%-20% organic solvent.

2. The antifouling and antibacterial imitation ceramic coating according to claim 1, characterized in that: The mass ratio of the tripropylene glycol diacrylate to the neopentyl glycol diacrylate is 10:

3.

3. The antifouling and antibacterial ceramic coating according to claim 1, characterized in that: The mass ratio of the nano zinc oxide, eugenol, terpineol and cyclohexanone is 1.5:1.5:2:

2.

4. The antifouling and antibacterial imitation ceramic coating according to claim 1, characterized in that: The dispersant is prepared by mixing polyethylene glycol diacrylate and hexafluoroisopropanol in a mass ratio of 1:(0.2-0.5).

5. The antifouling and antibacterial ceramic coating according to claim 1, characterized in that: The photoinitiator is prepared by mixing 2959 photoinitiator and TPO photoinitiator in a mass ratio of (2-4): (1-2).

6. The antifouling and antibacterial imitation ceramic coating according to claim 1, characterized in that: The organic solvent is any one of acetone, ethyl acetate, and isopropanol, or a mixture thereof.

7. The antifouling and antibacterial imitation ceramic coating according to claim 1, characterized in that: The particle size of the nano-silicon carbide is 10-50 nm, and the particle size of the nano-zinc oxide is 10-30 nm.

8. A method for preparing the antifouling and antibacterial ceramic-like coating according to any one of claims 1 to 7, characterized in that: The following steps are involved: Step 1: Mix the UV-curable fingerprint easy-to-clean fluorine-containing resin and 25%-30% UV-curable hybrid silicone-fluorine polyurethane acrylic and stir until uniformly dispersed to obtain material 1; mix the cyclohexanone, nano zinc oxide, eugenol, and terpineol until uniformly dispersed to obtain material 2; Step 2: Add tripropylene glycol diacrylate, neopentyl glycol diacrylate, photoinitiator, dispersant, nano-silicon carbide, and material 2 to the organic solvent in sequence, stir until mixed evenly, then add material 1 and fully disperse to obtain an antifouling and antibacterial imitation ceramic coating.

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