Preparation method and application of super-wear-resistant anti-fingerprint uv-resistant coating

Abstract

The application discloses a preparation method of a super-wear-resistant anti-fingerprint and UV-resistant coating and application thereof, and relates to the technical field of glass coating, in particular to the preparation method of the super-wear-resistant anti-fingerprint and UV-resistant coating.The preparation method comprises the following steps: S1, mixing AF coating and fluorine-modified UV-resistant coating to obtain a mixed solution; S2, preheating the cleaned and dried glass, and then performing plasma bombardment to make the water drop contact angle of the glass surface be less than or equal to 10 degrees; spraying the mixed solution onto the glass surface, and baking to obtain the super-wear-resistant anti-fingerprint and UV-resistant coating.In the technical scheme, the fluorine-modified UV-resistant coating and the AF coating are fully miscible, a dense crosslinked network can be formed on the glass after spraying, water and oil can be effectively prevented, the coating has the effects of UV resistance, anti-fingerprint, high wear resistance, and high light transmittance, the super-wear-resistant anti-fingerprint and UV-resistant coating prepared by the preparation method has more sustainable and excellent performance on the glass surface compared with similar products, the production and use efficiency is improved, and the coating is environment-friendly.

Description

Technical Field

[0001] This invention relates to the field of consumer 3C screens and optical glass technology, specifically to a method for preparing an ultra-wear-resistant, fingerprint-resistant, and UV-resistant coating and its application. Background Technology

[0002] With continuous societal progress and innovation in communication technology, mobile phones and computers are being updated more frequently. People's performance requirements for touchscreen displays are also gradually increasing. Not only do they need excellent screen performance, but the glass surface also needs to have good smoothness to enhance the user experience. The exposed state of touchscreens makes them susceptible to contamination from skin oils and sweat during use, affecting both appearance and usability. Therefore, to improve appearance, the requirements for anti-fingerprint technology are becoming increasingly stringent. This requires not only a good waterproof and oleophobic layer for the touchscreen but also resistance to damage during wiping, demanding excellent wear resistance. Simultaneously, UV resistance is added to reduce damage to the anti-fingerprint layer under ultraviolet radiation, further improving the weather resistance of the film and enhancing the user experience.

[0003] Currently, traditional anti-fingerprint liquids cannot withstand ultraviolet (UV) radiation. UV rays are ubiquitous in our environment, and the anti-fingerprint layers on commonly used electronic screens will have their perfluoropolyether modified ends damaged under UV exposure, causing bond breakage and resulting in coating failure. Existing processes add small-molecule UV-resistant agents to AF (anti-fingerprint) agents, but due to solubility issues, this often reduces the light transmittance of the glass and makes it difficult to adhere to the glass surface, severely affecting its lifespan. Secondly, fluorinated modified acrylic coatings are used to achieve anti-fouling and UV-resistant properties, but these coatings are often thick, have poor adhesion, lack cross-linking with the glass, are prone to peeling, have a poor feel, and affect the optical activity of the glass. Therefore, improving the anti-fingerprint, abrasion-resistant, and UV-resistant properties of glass coatings while maintaining high optical activity is a pressing problem to be solved. Summary of the Invention

[0004] The main objective of this invention is to propose a method for preparing an ultra-wear-resistant, fingerprint-resistant, and UV-resistant coating and its application, aiming to solve the problems that existing coatings for touch-sensitive electronic displays are easily contaminated by skin oils, sweat, etc., and cannot withstand ultraviolet radiation.

[0005] To achieve the above objectives, this invention proposes a method for preparing an ultra-wear-resistant, fingerprint-resistant, and UV-resistant coating, comprising the following steps:

[0006] S1. A mixture is prepared by mixing AF coating and fluorine-modified UV-resistant coating;

[0007] S2. After cleaning and drying, the glass is preheated and then bombarded with plasma to make the water droplet contact angle on the glass surface ≤10°. The mixture is then sprayed onto the glass surface and baked to obtain an ultra-wear-resistant, fingerprint-resistant, and UV-resistant coating.

[0008] Optionally, in step S1, the method for preparing the fluorine-modified UV-resistant coating includes the following steps:

[0009] S11. According to the mass fraction, take 20-25 parts of perfluoroalkyl olefin, 6-8 parts of alkylsiloxane, and 8-12 parts of 1,2,2,6,6-pentamethyl-4-piperidinyl acrylate, mix them, stir and heat to 80-100℃, keep the temperature for 10-12h, then heat to 110-120℃ and purify for 4-6h to obtain the perfluoropolyether modified alkylated product;

[0010] S12. According to the mass fraction, 15-25 parts of the perfluoropolyether modified alkylation product and 80-90 parts of hydrofluoroether are mixed and stirred to obtain a fluorine-modified UV-resistant coating.

[0011] Optionally, in step S11, the perfluoroalkyl olefin is perfluorodecylethylene.

[0012] Optionally, in step S11, the alkylsiloxane is tetramethyldisiloxane.

[0013] Optionally, in step S12, the hydrofluoroether is ethyl nonafluorobutyl ether.

[0014] Optionally, in step S1, the AF coating comprises the following components in parts by weight: 0.3 to 0.5 parts of Z-type perfluoropolyether siloxane, 50 to 65 parts of perfluorohexane, and 30 to 55 parts of hydrofluoroether.

[0015] Optionally, in step S1, the mass ratio of the AF coating to the fluorine-modified UV-resistant coating is 100:5.5 to 100; and / or,

[0016] In step S2, the preheating temperature is 60–100°C; and / or,

[0017] The spraying amount is 75-95 g / m². 2 ; and / or,

[0018] The baking temperature is 130–150°C; and / or,

[0019] The baking time is 15 to 30 minutes.

[0020] Optionally, the thickness of the ultra-wear-resistant, fingerprint-resistant, and UV-resistant coating is 15–20 nm.

[0021] Optionally, the ultra-wear-resistant, fingerprint-resistant, and UV-resistant coating has a water droplet angle ≥110°; and / or,

[0022] The oil droplet angle (n-hexadecane) of the ultra-wear-resistant, fingerprint-resistant, and UV-resistant coating is ≥65°; and / or,

[0023] The pencil hardness of the ultra-wear-resistant, fingerprint-resistant, and UV-resistant coating is ≥6H.

[0024] The present invention also proposes the application of the ultra-wear-resistant, fingerprint-resistant, and UV-resistant coating prepared by the preparation method described above, and to apply the ultra-wear-resistant, fingerprint-resistant, and UV-resistant coating to the coating of mobile phone or tablet computer screens.

[0025] The beneficial effects of this invention are as follows:

[0026] (1) In the technical solution provided by the present invention, by fully mixing the fluorine-modified UV-resistant coating and the AF coating, a dense cross-linked network can be formed when sprayed onto the glass. This network can effectively waterproof and oleophobic, and has UV resistance, anti-fingerprint effect, high wear resistance, and very high light transmittance.

[0027] (2) The present invention uses two perfluorinated coatings, which have excellent compatibility and can form strong chemical bonds on the glass surface, tightly bonded, improve the hardness of the coating, and further enhance the wear resistance of the coating. The modified perfluorinated polyether hindered amine compound in the UV coating has free radical capturing groups or ultraviolet absorbing groups in the molecular class, which further improves the weather resistance of the coating.

[0028] (3) Compared with similar products, the ultra-wear-resistant, fingerprint-resistant, and UV-resistant coating prepared by the preparation method provided by the present invention gives the glass surface more continuous and excellent performance, while improving production and use efficiency and being environmentally friendly. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a static contact angle diagram of the coating in Embodiment 2 of the present invention after UV irradiation with water.

[0031] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Where specific conditions are not specified in the embodiments, conventional conditions or conditions recommended by the manufacturer shall apply. Where the manufacturers of reagents or instruments are not specified, they are all conventional products that can be purchased commercially. Furthermore, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, or solution B, or a solution where both A and B are satisfied simultaneously. In addition, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] The technical solution of the present invention will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be understood that the following embodiments are only used to explain the present invention and are not intended to limit the present invention.

[0034] It should be noted that, unless otherwise specified, all chemical reagents involved in this invention were purchased through commercial channels.

[0035] The glass material used in this embodiment is Gorilla glass, 0.7mm thick.

[0036] Spray painting machine: AF7800 from Guangdong Zhenyi Intelligent Equipment Co., Ltd.

[0037] Type Z perfluoropolyether siloxane A: Optool UD 509 (produced by Daikin Industries, Ltd.)

[0038] Type Z perfluoropolyether siloxane B: GT-520 (Foxconn Co., Ltd.)

[0039] Z-type perfluoropolyether siloxane C: Shin-Etsu KY197

[0040] Example 1: A method for preparing an ultra-wear-resistant, fingerprint-resistant, and UV-resistant coating

[0041] (1) Take 8.92g of perfluorodecylethylene, 2.74g of tetramethyldisiloxane and 3.8g of 1,2,2,6,6-pentamethyl-4-piperidinyl acrylate, mix them evenly, stir and heat to 90℃, keep the temperature for 12h, and then purify them by heating to 120℃ with silicone oil for 6h to obtain the perfluoropolyether modified alkylated product;

[0042] (2) Add 20g of ethyl nonafluorobutyl ether to 5g of perfluoropolyether modified alkylate and stir for 30min to obtain fluorine-modified UV-resistant coating.

[0043] (3) Mix 0.05g of Z-type perfluoropolyether siloxane A, 6.5g of perfluorohexane and 5.5g of hydrofluoroether to prepare AF coating. Then take 10g of AF coating and mix it with 0.55g of fluorine-modified UV-resistant coating to prepare a mixture. Dissolve the mixture in hydrofluoroether (3M Company, Novec HFE7200) at a concentration of 0.3wt% to prepare a surface treatment agent.

[0044] (4) After cleaning the glass in a cleaning machine, it is placed in an oven to dry the surface moisture while preheating the glass to 60°C; the preheated glass is then bombarded with plasma to activate the surface functional groups, while ensuring that the water droplet angle on the glass surface is ≤10°; finally, a surface treatment agent is rapidly and evenly sprayed onto the glass surface at a coating amount of 75g / m². 2 Each nozzle has a flow rate of 16 g / min, a carrier plate width of 800 mm, a forward speed of 1.2 m / min, a swing arm speed of 800 mm / s, and a nozzle height of 2.0 cm. It is then baked in a 150°C oven for 30 min, and then left to stand for 24 hours at a temperature of 25°C and a humidity of 65% to obtain an ultra-wear-resistant, fingerprint-resistant, and UV-resistant coating.

[0045] Example 2: A method for preparing an ultra-wear-resistant, fingerprint-resistant, and UV-resistant coating

[0046] (1) Take 8.92g of perfluorodecylethylene, 2.74g of tetramethyldisiloxane and 3.8g of 1,2,2,6,6-pentamethyl-4-piperidinyl acrylate, mix them evenly, stir and heat to 90℃, keep the temperature for 12h, and then purify them by heating to 120℃ with silicone oil for 6h to obtain the perfluoropolyether modified alkylated product;

[0047] (2) Add 20g of ethyl nonafluorobutyl ether to 5g of perfluoropolyether modified alkylate and stir for 30min to obtain fluorine-modified UV-resistant coating.

[0048] (3) Mix 0.05g of Z-type perfluoropolyether siloxane B, 6.5g of perfluorohexane and 5.5g of hydrofluoroether to prepare AF coating. Then take 10g of AF coating and mix it with 0.55g of fluorine-modified UV-resistant coating to prepare a mixture. Dissolve the mixture in hydrofluoroether (3M Company, Novec HFE7200) at a concentration of 0.3wt% to prepare a surface treatment agent.

[0049] (4) After cleaning the glass in a cleaning machine, it is placed in an oven to dry the surface moisture while preheating the glass to 60°C; the preheated glass is then bombarded with plasma to activate the surface functional groups, while ensuring that the water droplet angle on the glass surface is ≤10°; finally, a surface treatment agent is rapidly and evenly sprayed onto the glass surface at a coating amount of 75g / m². 2 Each nozzle has a flow rate of 16 g / min, a carrier plate width of 800 mm, a forward speed of 1.2 m / min, a swing arm speed of 800 mm / s, and a nozzle height of 2.0 cm. It is then baked in a 150°C oven for 30 min, and then left to stand for 24 hours at a temperature of 25°C and a humidity of 65% to obtain an ultra-wear-resistant, fingerprint-resistant, and UV-resistant coating.

[0050] Example 3: A method for preparing an ultra-wear-resistant, fingerprint-resistant, and UV-resistant coating

[0051] (1) Take 8.92g of perfluorodecylethylene, 2.74g of tetramethyldisiloxane and 3.8g of 1,2,2,6,6-pentamethyl-4-piperidinyl acrylate, mix them evenly, stir and heat to 90℃, keep the temperature for 12h, and then purify them by heating to 120℃ with silicone oil for 6h to obtain the perfluoropolyether modified alkylated product;

[0052] (2) Add 20g of ethyl nonafluorobutyl ether to 5g of perfluoropolyether modified alkylate and stir for 30min to obtain fluorine-modified UV-resistant coating.

[0053] (3) Mix 0.05g of Z-type perfluoropolyether siloxane C, 6.5g of perfluorohexane and 5.5g of hydrofluoroether to prepare AF coating. Then take 10g of AF coating and mix it with 0.55g of fluorine-modified UV-resistant coating to prepare a mixture. Dissolve the mixture in hydrofluoroether (3M Company, Novec HFE7200) at a concentration of 0.3wt% to prepare a surface treatment agent.

[0054] (4) After cleaning the glass in a cleaning machine, it is placed in an oven to dry the surface moisture while preheating the glass to 60°C; the preheated glass is then bombarded with plasma to activate the surface functional groups, while ensuring that the water droplet angle on the glass surface is ≤10°; finally, a surface treatment agent is rapidly and evenly sprayed onto the glass surface at a coating amount of 75g / m². 2 Each nozzle has a flow rate of 16 g / min, a carrier plate width of 800 mm, a forward speed of 1.2 m / min, a swing arm speed of 800 mm / s, and a nozzle height of 2.0 cm. It is then baked in a 150°C oven for 30 min, and then left to stand for 24 hours at a temperature of 25°C and a humidity of 65% to obtain an ultra-wear-resistant, fingerprint-resistant, and UV-resistant coating.

[0055] Example 4: A method for preparing an ultra-wear-resistant, fingerprint-resistant, and UV-resistant coating

[0056] (1) Take 8.92g of perfluorodecylethylene, 2.74g of tetramethyldisiloxane and 3.8g of 1,2,2,6,6-pentamethyl-4-piperidinyl acrylate, mix them evenly, stir and heat to 90℃, keep the temperature for 12h, and then purify them by heating to 120℃ with silicone oil for 6h to obtain the perfluoropolyether modified alkylated product;

[0057] (2) Add 20g of ethyl nonafluorobutyl ether to 5g of perfluoropolyether modified alkylate and stir for 30min to obtain fluorine-modified UV-resistant coating.

[0058] (3) Mix 0.05g of Z-type perfluoropolyether siloxane A, 6.5g of perfluorohexane and 5.5g of hydrofluoroether to prepare AF coating. Then take 10g of AF coating and mix it with 5g of fluorine-modified UV-resistant coating to prepare a mixture. Dissolve the mixture in hydrofluoroether (3M Company, Novec HFE7200) at a concentration of 0.3wt% to prepare a surface treatment agent.

[0059] (4) After cleaning the glass in a cleaning machine, it is placed in an oven to dry the surface moisture while preheating the glass to 60°C; the preheated glass is then bombarded with plasma to activate the surface functional groups, while ensuring that the water droplet angle on the glass surface is ≤10°; finally, a surface treatment agent is rapidly and evenly sprayed onto the glass surface at a coating amount of 75g / m². 2 Each nozzle has a flow rate of 16 g / min, a carrier plate width of 800 mm, a forward speed of 1.2 m / min, a swing arm speed of 800 mm / s, and a nozzle height of 2.0 cm. It is then baked in a 150°C oven for 30 min, and then left to stand for 24 hours at a temperature of 25°C and a humidity of 65% to obtain an ultra-wear-resistant, fingerprint-resistant, and UV-resistant coating.

[0060] Example 5: A method for preparing an ultra-wear-resistant, fingerprint-resistant, and UV-resistant coating

[0061] (1) Take 8.92g of perfluorodecylethylene, 2.74g of tetramethyldisiloxane and 3.8g of 1,2,2,6,6-pentamethyl-4-piperidinyl acrylate, mix them evenly, stir and heat to 90℃, keep the temperature for 12h, and then purify them by heating to 120℃ with silicone oil for 6h to obtain the perfluoropolyether modified alkylated product;

[0062] (2) Add 20g of ethyl nonafluorobutyl ether to 5g of perfluoropolyether modified alkylate and stir for 30min to obtain fluorine-modified UV-resistant coating.

[0063] (3) Mix 0.05g of Z-type perfluoropolyether siloxane B, 6.5g of perfluorohexane and 5.5g of hydrofluoroether to prepare AF coating. Then take 10g of AF coating and mix it with 5g of fluorine-modified UV-resistant coating to prepare a mixture. Dissolve the mixture in hydrofluoroether (3M Company, Novec HFE7200) at a concentration of 0.3wt% to prepare a surface treatment agent.

[0064] (4) After cleaning the glass in a cleaning machine, it is placed in an oven to dry the surface moisture while preheating the glass to 60°C; the preheated glass is then bombarded with plasma to activate the surface functional groups, while ensuring that the water droplet angle on the glass surface is ≤10°; finally, a surface treatment agent is rapidly and evenly sprayed onto the glass surface at a coating amount of 75g / m². 2 Each nozzle has a flow rate of 16 g / min, a carrier plate width of 800 mm, a forward speed of 1.2 m / min, a swing arm speed of 800 mm / s, and a nozzle height of 2.0 cm. It is then baked in a 150°C oven for 30 min, and then left to stand for 24 hours at a temperature of 25°C and a humidity of 65% to obtain an ultra-wear-resistant, fingerprint-resistant, and UV-resistant coating.

[0065] Example 6: A method for preparing an ultra-wear-resistant, fingerprint-resistant, and UV-resistant coating

[0066] (1) Take 8.92g of perfluorodecylethylene, 2.74g of tetramethyldisiloxane and 3.8g of 1,2,2,6,6-pentamethyl-4-piperidinyl acrylate, mix them evenly, stir and heat to 90℃, keep the temperature for 12h, and then purify them by heating to 120℃ with silicone oil for 6h to obtain the perfluoropolyether modified alkylated product;

[0067] (2) Add 20g of ethyl nonafluorobutyl ether to 5g of perfluoropolyether modified alkylate and stir for 30min to obtain fluorine-modified UV-resistant coating.

[0068] (3) Mix 0.05g of Z-type perfluoropolyether siloxane C, 6.5g of perfluorohexane and 5.5g of hydrofluoroether to prepare AF coating. Then take 10g of AF coating and mix it with 5g of fluorine-modified UV-resistant coating to prepare a mixture. Dissolve the mixture in hydrofluoroether (3M Company, Novec HFE7200) at a concentration of 0.3wt% to prepare a surface treatment agent.

[0069] (4) After cleaning the glass in a cleaning machine, it is placed in an oven to dry the surface moisture while preheating the glass to 60°C; the preheated glass is then bombarded with plasma to activate the surface functional groups, while ensuring that the water droplet angle on the glass surface is ≤10°; finally, a surface treatment agent is rapidly and evenly sprayed onto the glass surface at a coating amount of 75g / m². 2Each nozzle has a flow rate of 16 g / min, a carrier plate width of 800 mm, a forward speed of 1.2 m / min, a swing arm speed of 800 mm / s, and a nozzle height of 2.0 cm. It is then baked in a 150°C oven for 30 min, and then left to stand for 24 hours at a temperature of 25°C and a humidity of 65% to obtain an ultra-wear-resistant, fingerprint-resistant, and UV-resistant coating.

[0070] Example 7: A method for preparing an ultra-wear-resistant, fingerprint-resistant, and UV-resistant coating

[0071] (1) Take 2.0g of perfluorodecylethylene, 0.6g of tetramethyldisiloxane and 0.8g of 1,2,2,6,6-pentamethyl-4-piperidinyl acrylate, mix them evenly, stir and heat to 80℃, keep the temperature for 10h, and then purify them by heating to 115℃ with silicone oil for 5h to obtain the perfluoropolyether modified alkylated product.

[0072] (2) Add 9g of ethyl nonafluorobutyl ether to 2.5g of perfluoropolyether modified alkylate and stir for 30min to obtain fluorine-modified UV-resistant coating.

[0073] (3) Mix 0.03g of Z-type perfluoropolyether siloxane A, 5g of perfluorohexane and 3g of hydrofluoroether to prepare AF coating. Then take 5g of AF coating and mix it with 5g of fluorine-modified UV-resistant coating to prepare a mixture. Dissolve the mixture in hydrofluoroether (3M Company, Novec HFE7200) at a concentration of 0.3wt% to prepare a surface treatment agent.

[0074] (4) After the glass is cleaned by the cleaning machine, it is placed in the drying oven to dry the surface moisture and preheat the glass to 100°C. The preheated glass is then bombarded with plasma to activate the surface functional groups and to ensure that the water droplet angle on the glass surface is ≤10°. Then, the surface treatment agent is quickly and evenly sprayed onto the glass surface at a spraying amount of 95g / m². 2 Each nozzle has a flow rate of 16 g / min, a carrier plate width of 800 mm, a forward speed of 1.2 m / min, a swing arm speed of 800 mm / s, and a nozzle height of 2.0 cm. It is then baked in a 130°C oven for 15 min, and then left to stand for 24 hours at a temperature of 25°C and a humidity of 65% to obtain an ultra-wear-resistant, fingerprint-resistant, and UV-resistant coating.

[0075] Example 8: A method for preparing an ultra-wear-resistant, fingerprint-resistant, and UV-resistant coating

[0076] (1) Take 2.0g of perfluorodecylethylene, 0.6g of tetramethyldisiloxane and 0.8g of 1,2,2,6,6-pentamethyl-4-piperidinyl acrylate, mix them evenly, stir and heat to 80℃, keep the temperature for 10h, and then purify them by heating to 115℃ with silicone oil for 5h to obtain the perfluoropolyether modified alkylated product.

[0077] (2) Add 9g of ethyl nonafluorobutyl ether to 2.5g of perfluoropolyether modified alkylate and stir for 30min to obtain fluorine-modified UV-resistant coating.

[0078] (3) Mix 0.03g of Z-type perfluoropolyether siloxane B, 5g of perfluorohexane and 3g of hydrofluoroether to prepare AF coating. Then take 5g of AF coating and mix it with 5g of fluorine-modified UV-resistant coating to prepare a mixture. Dissolve the mixture in hydrofluoroether (3M Company, Novec HFE7200) at a concentration of 0.3wt% to prepare a surface treatment agent.

[0079] (4) After the glass is cleaned by the cleaning machine, it is placed in the drying oven to dry the surface moisture and preheat the glass to 100°C. The preheated glass is then bombarded with plasma to activate the surface functional groups and to ensure that the water droplet angle on the glass surface is ≤10°. Then, the surface treatment agent is quickly and evenly sprayed onto the glass surface at a spraying amount of 95g / m². 2 Each nozzle has a flow rate of 16 g / min, a carrier plate width of 800 mm, a forward speed of 1.2 m / min, a swing arm speed of 800 mm / s, and a nozzle height of 2.0 cm. It is then baked in a 130°C oven for 15 min, and then left to stand for 24 hours at a temperature of 25°C and a humidity of 65% to obtain an ultra-wear-resistant, fingerprint-resistant, and UV-resistant coating.

[0080] Example 9: A method for preparing an ultra-wear-resistant, fingerprint-resistant, and UV-resistant coating

[0081] (1) Take 2.5g of perfluorodecylethylene, 0.8g of tetramethyldisiloxane and 1.2g of 1,2,2,6,6-pentamethyl-4-piperidinyl acrylate, mix them evenly, stir and heat to 100℃, keep the temperature for 11h, and then purify by heating to 120℃ with silicone oil for 6h to obtain the perfluoropolyether modified alkylated product.

[0082] (2) Add 8.5g of ethyl nonafluorobutyl ether to 2g of perfluoropolyether modified alkylate and stir for 30min to obtain fluorine-modified UV-resistant coating;

[0083] (3) Mix 0.04g of Z-type perfluoropolyether siloxane C, 6g of perfluorohexane and 5g of hydrofluoroether to prepare AF coating. Then take 10g of AF coating and mix it with 5g of fluorine-modified UV-resistant coating to prepare a mixture. Dissolve the mixture in hydrofluoroether (3M Company, Novec HFE7200) at a concentration of 0.3wt% to prepare a surface treatment agent.

[0084] (4) After the glass is cleaned by the cleaning machine, it is placed in the drying oven to dry the surface moisture and preheat the glass to 80°C. The preheated glass is then bombarded with plasma to activate the surface functional groups and to ensure that the water droplet angle on the glass surface is ≤10°. Then, the surface treatment agent is quickly and evenly sprayed onto the glass surface at a spraying amount of 80g / m². 2 Each single nozzle has a flow rate of 16 g / min, a carrier plate width of 800 mm, a forward speed of 1.2 m / min, a swing arm speed of 800 mm / s, and a nozzle height of 2.0 cm. It is then baked in a 140℃ oven for 20 min, and then left to stand for 24 hours at a temperature of 25℃ and a humidity of 65% to obtain an ultra-wear-resistant, fingerprint-resistant, and UV-resistant coating.

[0085] Comparative Example 1: A method for preparing a glass coating

[0086] (1) Mix 0.05g of Z-type perfluoropolyether siloxane A, 6.5g of perfluorohexane and 5.5g of hydrofluoroether to prepare AF coating. Dissolve the AF coating in hydrofluoroether (manufactured by 3M Company, Novec HFE7200) at a concentration of 0.3wt% to prepare surface treatment agent.

[0087] (2) After the glass is cleaned by a cleaning machine, it is placed in an oven to dry the surface moisture while preheating the glass to 60°C; the preheated glass is then bombarded with plasma to activate the surface functional groups and ensure that the water droplet angle on the glass surface is ≤10°; then the surface treatment agent is quickly and evenly sprayed onto the glass surface at a spraying amount of 75g / m². 2 Each nozzle has a flow rate of 16 g / min, a carrier plate width of 800 mm, a forward speed of 1.2 m / min, a swing arm speed of 800 mm / s, and a nozzle height of 2.0 cm. It is then baked in a 150°C oven for 30 min, and then left to stand for 24 hours at a temperature of 25°C and a humidity of 65% to obtain a glass coating.

[0088] Comparative Example 2: A method for preparing a glass coating

[0089] (1) Mix 0.05g of Z-type perfluoropolyether siloxane B, 6.5g of perfluorohexane and 5.5g of hydrofluoroether to prepare AF coating. Dissolve the AF coating in hydrofluoroether (manufactured by 3M Company, Novec HFE7200) at a concentration of 0.3wt% to prepare surface treatment agent.

[0090] (2) After the glass is cleaned by a cleaning machine, it is placed in an oven to dry the surface moisture while preheating the glass to 60°C; the preheated glass is then bombarded with plasma to activate the surface functional groups and ensure that the water droplet angle on the glass surface is ≤10°; then the surface treatment agent is quickly and evenly sprayed onto the glass surface at a spraying amount of 75g / m². 2Each nozzle has a flow rate of 16 g / min, a carrier plate width of 800 mm, a forward speed of 1.2 m / min, a swing arm speed of 800 mm / s, and a nozzle height of 2.0 cm. It is then baked in a 150°C oven for 30 min, and then left to stand for 24 hours at a temperature of 25°C and a humidity of 65% to obtain an ultra-wear-resistant, fingerprint-resistant, and UV-resistant coating.

[0091] Comparative Example 3: A method for preparing a glass coating

[0092] (1) Mix 0.05g of Z-type perfluoropolyether siloxane C, 6.5g of perfluorohexane and 5.5g of hydrofluoroether to prepare AF coating. Dissolve the AF coating in hydrofluoroether (manufactured by 3M Company, Novec HFE7200) at a concentration of 0.3wt% to prepare surface treatment agent.

[0093] (2) After the glass is cleaned by a cleaning machine, it is placed in an oven to dry the surface moisture while preheating the glass to 60°C; the preheated glass is then bombarded with plasma to activate the surface functional groups and ensure that the water droplet angle on the glass surface is ≤10°; then the surface treatment agent is quickly and evenly sprayed onto the glass surface at a spraying amount of 75g / m². 2 Each nozzle has a flow rate of 16 g / min, a carrier plate width of 800 mm, a forward speed of 1.2 m / min, a swing arm speed of 800 mm / s, and a nozzle height of 2.0 cm. It is then baked in a 150°C oven for 30 min, and then left to stand for 24 hours at a temperature of 25°C and a humidity of 65% to obtain an ultra-wear-resistant, fingerprint-resistant, and UV-resistant coating.

[0094] Comparative Example 4: A method for preparing a glass coating

[0095] (1) Take 8.92g of perfluorodecylethylene, 2.74g of tetramethyldisiloxane and 3.8g of 1,2,2,6,6-pentamethyl-4-piperidinyl acrylate, mix them evenly, stir and heat to 90℃, keep the temperature for 12h, and then purify them by heating to 120℃ with silicone oil for 6h to obtain the perfluoropolyether modified alkylated product;

[0096] (2) Add 20g of ethyl nonafluorobutyl ether to 5g of perfluoropolyether modified alkylate and stir for 30min to obtain fluorine-modified UV-resistant coating. Dissolve the fluorine-modified UV-resistant coating in hydrofluoroether (3M Company, Novec HFE7200) at a concentration of 0.3wt% to prepare a surface treatment agent.

[0097] (3) After the glass is cleaned by the cleaning machine, it is placed in the drying oven to dry the surface moisture while preheating the glass to 60°C; the preheated glass is bombarded with plasma to activate the surface groups of the glass, while ensuring that the water droplet angle on the glass surface is ≤10°; then the surface treatment agent is quickly and evenly sprayed onto the glass surface at a spraying amount of 75g / m². 2 Each nozzle has a flow rate of 16 g / min, a carrier plate width of 800 mm, a forward speed of 1.2 m / min, a swing arm speed of 800 mm / s, and a nozzle height of 2.0 cm. It is then baked in a 150°C oven for 30 min, and then left to stand for 24 hours at a temperature of 25°C and a humidity of 65% to obtain a glass coating.

[0098] Test methods and results

[0099] (1) Determination of static contact angle

[0100] The coating surfaces obtained in Examples 1-9 and Comparative Examples 1-4 were irradiated with UV light for 450 hours using a xenon lamp at a wavelength of 420 nm with an irradiance of 2.2 W / m². 2 The process was carried out with the distance between the lamp and the substrate surface set at 10 cm. The static contact angle of water on the coating surface after UV irradiation was then measured. A contact angle measuring device (Beijing HARKE-DWA) was used to measure the static contact angle, and 1 μL of water was used in an environment of 25°C and 65% humidity. The measured values ​​of the static contact angle and the ratio of the static contact angle of water after UV irradiation to the static contact angle of water before UV irradiation (100 × static contact angle of water after UV irradiation / static contact angle of water before UV irradiation) are shown in Table 1 below. The static contact angle of the coating in Example 2 after UV irradiation was measured using an electronic water droplet angle meter. Figure 1 .

[0101] Table 1 Static contact angle of water on the coating surface

[0102]

[0103]

[0104] (2) Friction durability evaluation

[0105] The friction durability of the coatings in Examples 1-9 and Comparative Examples 1-4 was determined using a friction testing machine (Taber, 5900), and the results are shown in Table 2. Friction was performed under the following conditions, and the water contact angle of the coating was measured. Each pass consisted of 1000 round trips. The water contact angle was measured (evaluation was terminated when the water contact angle was below 100 degrees or after 20,000 friction cycles or when the steel wool was damaged). The number of round trips of the steel wool when the measured contact angle was less than 100 degrees was taken as the steel wool durability. The ratio of the steel wool durability after UV irradiation to the steel wool durability before UV irradiation was calculated (100 × steel wool durability after UV irradiation / steel wool durability before UV irradiation).

[0106] Resistance to abrasion of steel velvet

[0107] Wire Velvet: BONSTAR#0000

[0108] Load: 1 kg / cm 2

[0109] Travel distance: 40mm

[0110] Movement speed: 60 rpm

[0111] Table 2 Friction Durability Evaluation Table

[0112]

[0113]

[0114] Depend on Figure 1 The static contact angle of the coating with water after UV irradiation was measured and calculated to be 116.31°, indicating that the coating has strong hydrophobicity.

[0115] As shown in Table 1, compared to the decrease in contact angle values ​​of the coatings in Comparative Examples 1-4 before and after UV irradiation, the contact angle values ​​of the coatings in Examples 1-9 of the present invention did not decrease before and after UV irradiation. Therefore, it can be seen that the coatings provided by the present invention do not easily decrease in water repellency even after UV irradiation, and exhibit excellent UV resistance.

[0116] As shown in Table 2, the coatings of Examples 1 to 9 of the present invention have the same velvet durability even after UV irradiation as before UV irradiation. The ratio of velvet durability to that of the coatings in Comparative Examples 1 to 3 is no more than 60%. Therefore, the addition of the UV-resistant coating improves the hydrophobicity and abrasion resistance of the coating.

[0117] In summary, this invention employs two perfluorinated coatings that exhibit excellent compatibility and can form strong chemical bonds on the glass surface, resulting in a tight bond that improves the coating's hardness and further enhances its wear resistance. The modified perfluorinated polyether hindered amine compound in the UV coating possesses free radical scavenging groups or ultraviolet absorbing groups at the molecular level, further improving the coating's weather resistance. The coating provided by this invention is suitable for use on a wide variety of substrates, especially for forming surface treatment layers on optical components requiring transparency. Moreover, the preparation method of the compounds in this invention is simple, easy to operate, and easy to implement.

[0118] The above are merely preferred embodiments of the present invention and do not limit the patent scope of the present 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 principles of the present invention should be included within the patent protection scope of the present invention.

Claims

1. A method for preparing an ultra-wear-resistant, fingerprint-resistant, and UV-resistant coating, characterized in that, Includes the following steps: S1. A mixture is prepared by mixing AF coating and fluorine-modified UV-resistant coating; S2. Preheat the cleaned and dried glass, then bombard it with plasma to make the water droplet contact angle on the glass surface ≤10º, spray the mixture onto the glass surface, and bake to obtain an ultra-wear-resistant, fingerprint-resistant and UV-resistant coating. In step S1, the preparation method of the fluorine-modified UV-resistant coating includes the following steps: S11. According to the mass fraction, take 20-25 parts of perfluoroalkyl olefin, 6-8 parts of alkylsiloxane, and 8-12 parts of 1,2,2,6,6-pentamethyl-4-piperidinyl acrylate, mix them, stir and heat to 80-100℃, keep the temperature for 10-12h, then heat to 110-120℃ and purify for 4-6h to obtain the perfluoropolyether modified alkylated product; S12. According to the mass fraction, 15-25 parts of the perfluoropolyether modified alkylation product and 80-90 parts of hydrofluoroether are mixed and stirred to obtain a fluorine-modified UV-resistant coating. In step S1, the mass ratio of the AF coating to the fluorine-modified UV-resistant coating is 100:5.5~100; In step S11, the perfluoroalkyl olefin is perfluorodecylethylene; The alkylsiloxane is tetramethyldisiloxane.

2. The method for preparing the ultra-wear-resistant, fingerprint-resistant, and UV-resistant coating as described in claim 1, characterized in that, In step S12, the hydrofluoroether is ethyl nonafluorobutyl ether.

3. The method for preparing the ultra-wear-resistant, fingerprint-resistant, and UV-resistant coating as described in claim 1, characterized in that, In step S1, the AF coating comprises the following components in parts by weight: 0.3 to 0.5 parts of Z-type perfluoropolyether siloxane, 50 to 65 parts of perfluorohexane, and 30 to 55 parts of hydrofluoroether.

4. The method for preparing the ultra-wear-resistant, fingerprint-resistant, and UV-resistant coating as described in claim 1, characterized in that, In step S2, the preheating temperature is 60~100℃; and / or, The spraying amount is 75~95g / m². 2 ; and / or, The baking temperature is 130~150℃; and / or, The baking time is 15-30 minutes.

5. The method for preparing the ultra-wear-resistant, fingerprint-resistant, and UV-resistant coating as described in claim 1, characterized in that, The thickness of the ultra-wear-resistant, fingerprint-resistant, and UV-resistant coating is 15~20nm.

6. The method for preparing the ultra-wear-resistant, fingerprint-resistant, and UV-resistant coating as described in claim 1, characterized in that, The ultra-wear-resistant, fingerprint-resistant, and UV-resistant coating has a water droplet angle ≥110°; and / or, The oil droplet angle of the ultra-wear-resistant, fingerprint-resistant, and UV-resistant coating is ≥65°; and / or, The pencil hardness of the ultra-wear-resistant, fingerprint-resistant, and UV-resistant coating is ≥6H.

7. The application of the ultra-wear-resistant, fingerprint-resistant, and UV-resistant coating prepared by the preparation method according to any one of claims 1 to 6, characterized in that, The ultra-wear-resistant, fingerprint-resistant, and UV-resistant coating is applied to the screen of a mobile phone or tablet computer.

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