Protective coating and preparation method thereof, touch panel, display and vehicle

Abstract

The embodiment of the invention provides a protective coating and a preparation method thereof, a touch panel, a display and a vehicle. The protective coating comprises a first coating and a second coating. The first coating comprises a modified polysiloxane polymer and is used for being connected with a matrix, and the modified polysiloxane polymer comprises an adhesive resin component and an antistatic resin component; the second coating is arranged on the side, away from the base body, of the first coating, and the second coating comprises a perfluoropolyether polymer. According to the protective coating disclosed by the embodiment of the invention, the first coating made of the modified polysiloxane polymer and the second coating made of the perfluoropolyether polymer are arranged, so that the protective coating has good antifouling and hydrophobic effects and strong adhesive force with a matrix, and when the protective coating is used for a touch panel of a display, the protective coating is not easy to fall off. The adverse effect caused by static accumulation can be reduced, and the running stability and the service life of the display using the protective coating can be improved.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of protective coatings, and more particularly to a protective coating and a preparation method thereof, a touch panel, a display, and a vehicle. Background Art

[0002] In related technologies, touch panels on displays are frequently used through touch operations. Long-term use can leave stains on the display panels, making them difficult to clean. Furthermore, in rainy and foggy weather with high humidity, condensation can form on the display surface. Furthermore, static electricity can also occur when a finger touches the display panel. These issues can affect the stability and lifespan of the display, and therefore require improvement. Summary of the Invention

[0003] The embodiment of the present application provides a protective coating, which has good anti-fouling and hydrophobic effects and strong adhesion to the substrate. When the protective coating is used for the touch panel of a display, it can reduce the adverse effects of static electricity accumulation, which is beneficial to improving the operating stability and life of the display using the protective coating.

[0004] This application also proposes a method for preparing the above-mentioned protective coating.

[0005] The present application also proposes a touch panel having the above-mentioned protective coating.

[0006] The present application also proposes a display having the above touch panel.

[0007] The present application also proposes a vehicle having the above-mentioned display.

[0008] The protective coating according to the embodiment of the first aspect of the present application includes: a first coating, the first coating includes a modified polysiloxane polymer and is used to connect to a substrate, the modified polysiloxane polymer includes an adhesion resin component and an antistatic resin component; a second coating, the second coating is arranged on a side of the first coating away from the substrate, and the second coating includes a perfluoropolyether polymer.

[0009] According to the protective coating of the embodiment of the present application, a first coating layer including a polysiloxane polymer is provided and the first coating layer is connected to a substrate. An adhesive resin component is provided in the modified polysiloxane polymer, which can enhance the adhesion of the first coating layer, thereby enhancing the adhesion between the protective coating layer and the substrate and improving the durability of the protective coating layer. An antistatic resin component is provided in the modified polysiloxane polymer, which can reduce the adverse effects of static electricity accumulation during use of the protective coating layer for a touch panel. In addition, the protective coating layer further includes a second coating layer provided on a side of the first coating layer facing away from the substrate, and the second coating layer is provided to include a perfluoropolyether polymer. The second coating layer having the perfluoropolyether polymer as the surface layer can provide the protective coating layer with good anti-fouling and hydrophobic effects, thereby facilitating improved operational stability and lifespan of the display using the protective coating layer.

[0010] According to some embodiments of the present application, the adhesion resin component includes -(CH2) a CHCOOH-, a≥1 and is an integer.

[0011] In the above technical solution, by making the adhesive resin component include -(CH2) a CHCOOH- can enhance the adhesion of the first coating, thereby enhancing the adhesion of the protective coating to the substrate.

[0012] According to some embodiments of the present application, the antistatic resin component includes -(CH2) b O-, b≥1 and is an integer.

[0013] In the above technical solution, by making the antistatic resin component include -(CH2) b O-, can make the protective coating have better antistatic properties.

[0014] According to some embodiments of the present application, the molecular structural formula of the modified polysiloxane polymer is:

[0015]

[0016] Wherein, R1 is one of hydroxyl, carboxyl, epoxy or amino, R2 is one of methyl, ethyl, aromatic group or hydroxyl, 60≤x≤150, 24≤y≤60, 33≤m≤83 and x, y and m are all integers.

[0017] In the above technical solution, by setting the molecular structure of the modified polysiloxane polymer to the above molecular structure, the first coating layer can have better adhesion and antistatic properties.

[0018] According to some embodiments of the present application, in the infrared spectrum of the protective coating: at 1080 cm-1 There is a characteristic peak corresponding to -Si-O-Si- at ​​1100 cm -1 ~1300cm -1 There is a characteristic peak corresponding to CF at 900 cm -1 ~1000cm -1 There is a characteristic peak corresponding to COC at 700 cm -1 ~800cm -1 There are characteristic peaks corresponding to aromatic rings.

[0019] In the above technical solution, by having characteristic peaks corresponding to -Si-O-Si-, CF, COC and aromatic rings at corresponding positions in the infrared spectrum, the adverse effects of static electricity accumulation during use of the protective coating for touch panels can be reduced, and the protective coating can also have good anti-fouling and hydrophobic effects, which is beneficial to improving the stability and life of the display using the protective coating.

[0020] According to some embodiments of the present application, in the infrared spectrum of the protective coating: at 1700 cm -1 ~1725cm -1 There is a characteristic peak corresponding to -COOH.

[0021] In the above technical solution, the presence of a characteristic peak of -COOH at the corresponding position in the infrared spectrum can enhance the adhesion of the protective coating, thereby enhancing the adhesion between the protective coating and the substrate and improving the durability of the protective coating.

[0022] According to some embodiments of the present application, the contact angle of the surface of the protective coating is 100° to 128°.

[0023] In the above technical solution, by setting the contact angle of the surface of the protective coating to 100° to 128°, the surface of the protective coating has good hydrophobicity and anti-fouling properties, thereby achieving anti-fouling and hydrophobic effects and facilitating the cleaning of the protective coating.

[0024] According to some embodiments of the present application, after the protective coating undergoes an aging durability test for a preset time, the contact angle of the surface of the protective coating decreases by less than 5°.

[0025] In the above technical solution, after the protective coating undergoes an aging durability test of greater than or equal to 500 hours, the contact angle of the surface of the protective coating decreases by less than 5°, so that the protective coating can still have good hydrophobicity and anti-fouling properties after long-term use.

[0026] According to some embodiments of the present application, the root mean square roughness of the surface of the protective coating is 3.5 nm.

[0027] In the above technical solution, by making the root mean square roughness of the surface of the protective coating layer be 3.5 nm, the surface of the protective coating layer can be made smooth, making it difficult for liquid to remain on the surface of the protective coating layer; and when the protective coating layer is used on the touch panel of a display, the user can have a good tactile feeling.

[0028] According to some embodiments of the present application, the thickness of the protective coating is 30 to 50 nm.

[0029] In the above technical solution, by setting the thickness of the protective coating layer to 30 to 50 nm, the protective coating layer can have a better protective effect.

[0030] According to some embodiments of the present application, the thickness of the first coating layer is 10 to 30 nm, and the thickness of the second coating layer is 20 to 40 nm.

[0031] In the above technical solution, by setting the thickness of the first coating to 10-30 nm, the first coating can have stronger adhesion to the substrate and better antistatic properties; by setting the thickness of the second coating to 20-40 nm, the protective coating can have better anti-fouling and hydrophobic effects.

[0032] According to some embodiments of the present application, the modified polysiloxane polymer is soluble in ethylene glycol, propylene glycol, toluene, chloroform or ether; and the perfluoropolyether polymer is soluble in acetone, toluene or perfluoropropane.

[0033] In the above technical solution, by making the modified polysiloxane polymer soluble in ethylene glycol, propylene glycol, toluene, chloroform or ether, and making the perfluoropolyether polymer soluble in acetone, toluene or perfluoropropane, during the preparation of the protective coating, the modified polysiloxane polymer can be dissolved in ethylene glycol, propylene glycol, toluene, chloroform or ether to form a fluid substance, which is convenient for coating it on the substrate; the perfluoropolyether polymer can be dissolved in acetone, toluene or perfluoropropane to form a fluid substance, which is convenient for coating it on the first coating, thereby making the preparation process of the protective coating less difficult and the prepared protective coating more uniform.

[0034] According to a method for preparing a protective coating according to an embodiment of the second aspect of the present application, the protective coating is the protective coating according to the embodiment of the first aspect of the present application, and the method for preparing the protective coating comprises:

[0035] Cleaning the surface of the substrate;

[0036] forming the first coating on the surface of the substrate;

[0037] forming the second coating layer on the surface of the first coating layer;

[0038] The substrate having the first coating layer and the second coating layer formed thereon is dried at a first drying temperature for a first preset time to form the protective coating layer on the substrate.

[0039] According to the preparation method of the protective coating of the embodiment of the present application, by plasma cleaning the surface of the substrate, surface grease and hydrocarbon dirt can be removed, and the surface reactive groups can be activated, so that the polar groups in the first coating can form chemical bonds with the hydroxyl and carboxyl groups on the surface of the substrate, thereby enhancing the adhesion of the first coating; the first coating layer is formed on the surface of the coating substrate by a spin coating process, which can make the first coating layer attached to the surface of the substrate more uniform, which is conducive to the subsequent attachment of the second coating layer to the first coating layer, thereby improving the adhesion of the second coating layer; the second coating layer is applied in a vacuum environment by an evaporation process, which can avoid the influence of impurities and gas molecules in the air on the film-forming process of the second coating layer, thereby ensuring the purity and density of the second coating layer.

[0040] According to some embodiments of the present application, the first coating layer is formed on the surface of the substrate by a spin coating process, and the process parameters of the spin coating process include: a spin coating speed of 500 to 2000 rpm and a spin coating time of 20 to 30 s.

[0041] In the above technical solution, by setting the spin coating speed to 500-2000 rpm, the first coating on the substrate can be made more uniform and have stronger adhesion to the substrate; setting the spin coating time to 20-30s can make the spin coating efficiency of the first coating higher.

[0042] According to some embodiments of the present application, the second coating is formed on the surface of the first coating by an evaporation process, and the process parameters of the evaporation process include: an evaporation rate of 0.3 to 0.5 nm / s, a vacuum degree of 3 to 5 MPa, and a crucible temperature of 380°C to 400°C.

[0043] In the above technical solution, by setting the evaporation rate to 0.3~0.5nm / s, the evaporation process can be made more stable and the second coating can have good density; by setting the vacuum degree to 3~5MPa, the content of gas molecules is reduced, thereby reducing the influence of gas molecules on the second coating; by setting the crucible temperature to 380℃~400℃, the second coating can be stabilized in a gas state, maintaining the stability of the evaporation process, thereby making the second coating have good density.

[0044] According to some embodiments of the present application, after the first coating is formed on the surface of the substrate and before the second coating is formed on the surface of the first coating, the first coating is dried at a second drying temperature for a second preset time, and the second preset time is less than the first preset time.

[0045] In the above technical solution, after the spin coating process is completed and before the second coating is formed on the surface of the first coating, the first coating is dried at a second drying temperature for a second preset time, which can volatilize the organic solvent in the first coating and help accelerate the curing and film formation of the first coating; by making the second preset time for drying the first coating shorter than the first preset time for drying the protective coating as a whole, it can prevent the first coating from drying out due to the cumulative drying time being too long, which is beneficial to improving the molding quality of the protective coating.

[0046] According to some embodiments of the present application, the first drying temperature is 130-150° C., and the first preset time is 2-3 hours.

[0047] In the above technical solution, by setting the first drying temperature to 130-150° C., the organic solvent in the protective coating can be volatilized, which is beneficial to accelerate the curing film formation of the protective coating and prevent the protective coating from drying out due to excessive temperature.

[0048] According to the touch panel of the third embodiment of the present application, it includes: a panel body; the protective coating according to the first embodiment of the present application, the protective coating covering the outer surface of the panel body, and the panel body constituting the substrate.

[0049] According to the touch panel of the embodiment of the present application, the protective coating is provided with the above-mentioned protective coating, which has good anti-fouling and hydrophobic effects and strong adhesion to the substrate. Moreover, when the protective coating is used for the touch panel of the display, the adverse effects caused by static electricity accumulation can be reduced, which is beneficial to improving the stability and life of the display using the protective coating.

[0050] A display according to an embodiment of the fourth aspect of the present application includes: a touch panel according to the embodiment of the third aspect of the present application.

[0051] According to the display of the embodiment of the present application, the above-mentioned touch panel is provided. The protective coating used in the touch panel has good anti-fouling and hydrophobic effects, and has strong adhesion to the substrate. In addition, when the protective coating is used for the touch panel of the display, the adverse effects caused by static electricity accumulation can be reduced, which is beneficial to improving the operating stability and life of the display using the protective coating.

[0052] The vehicle according to the fifth embodiment of the present application includes: the display according to the fourth embodiment of the present application.

[0053] According to the vehicle of the embodiment of the present application, there is provided with the above-mentioned display. The protective coating used in the display has good anti-fouling and hydrophobic effects, and has strong adhesion to the substrate. Moreover, when the protective coating is used for the touch panel of the display, the adverse effects caused by static electricity accumulation can be reduced, which is beneficial to improving the operating stability and life of the display using the protective coating.

[0054] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0056] Figure 1 is a cross-sectional schematic diagram of a protective coating provided in one embodiment of the present application;

[0057] Figure 2 1 is a schematic flow chart of a method for preparing a protective coating provided in one embodiment of the present application;

[0058] Figure 3 This is a scanning electron microscope (SEM) image of the protective coating provided in one embodiment of the present application;

[0059] Figure 4 This is a comparison chart of the hydrophobic performance test of the protective coating provided in one embodiment of the present application;

[0060] Figure 5 This is a comparison chart of the durability reliability test of the protective coating provided in one embodiment of the present application;

[0061] Figure 6 This is a comparison diagram of the antifouling effects of a substrate coated with a protective coating and a substrate without a protective coating provided in one embodiment of the present application;

[0062] Figure 7 This is a comparison chart of the stain cleaning effects of a substrate coated with a protective coating and a substrate without a protective coating provided in one embodiment of the present application.

[0063] Reference numerals:

[0064] 10. Protective coating; 11. First coating; 12. Second coating;

[0065] 20. Matrix. DETAILED DESCRIPTION

[0066] In order to make the technical problems, technical solutions and beneficial effects solved by this application more clearly understood, this application is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0067] Reference below Figure 1-Figure 7 A protective coating 10 according to an embodiment of the present application is described.

[0068] refer to Figure 1 A protective coating 10 provided in an embodiment of the present application includes: a first coating 11 and a second coating 12.

[0069] The first coating 11 includes a modified polysiloxane polymer and is used to connect to the substrate 20. The modified polysiloxane polymer includes an adhesive resin component and an antistatic resin component. The second coating 12 is provided on the side of the first coating 11 away from the substrate 20. The second coating 12 includes a perfluoropolyether polymer.

[0070] Modified polysiloxane polymer is a polymer with Si-O-Si bond as the main chain. This structure makes modified polysiloxane polymer have excellent resistance to UV decomposition, thermal stability, stain resistance and chemical corrosion resistance.

[0071] The adhesive resin component in the modified polysiloxane polymer can bind to active groups such as hydroxyl groups and oxygen anion groups on the surface of substrate 20, thereby enhancing the adhesion of protective coating 10 to the surface of substrate 20 and improving the durability of protective coating 10. Adhesion testing and evaluation of protective coating 10 in accordance with GB / T 9286 yielded a grade 0 result, indicating excellent adhesion.

[0072] The antistatic resin component in the modified polysiloxane polymer can quickly conduct away static charges and prevent static electricity accumulation. Therefore, when the protective coating 10 is used for a touch panel, it can reduce static electricity accumulation during use and reduce the impact of static electricity accumulation on the display using the touch panel.

[0073] The surface of the perfluoropolyether polymer has low free energy and has hydrophobic and oleophobic properties, which makes it difficult for water and other liquids to wet and adhere to the surface of the perfluoropolyether polymer, thereby preventing dirt from being retained in the protective coating 10 and facilitating the cleaning of the protective coating 10; the perfluoropolyether polymer has strong resistance to most corrosive chemicals such as acids, alkalis and oxidants, which enables the perfluoropolyether polymer to remain stable in harsh environments. The perfluoropolyether polymer also has a low friction coefficient, so the perfluoropolyether polymer can reduce wear caused by chemical corrosion and physical friction, and improve the hydrophobicity, smoothness and durability of the protective coating 10.

[0074] Placing the polysiloxane polymer of the first coating 11 on the side close to the substrate 20 is beneficial to enhancing the adhesion of the protective coating 10 to the surface of the substrate 20, and is also beneficial to the conduction of electrostatic charges and the prevention of static electricity accumulation; placing the perfluoropolyether polymer of the second coating 12 on the side away from the substrate 20 is beneficial to withstand external chemical corrosion and physical friction, and improve the waterproof, smooth and durable properties of the protective coating 10.

[0075] According to the protective coating 10 of the embodiment of the present application, a first coating 11 including a polysiloxane polymer is provided and the first coating 11 is connected to the substrate 20. The modified polysiloxane polymer is provided with an adhesive resin component, which can enhance the adhesion of the first coating 11, thereby enhancing the adhesion between the protective coating 10 and the substrate 20 and improving the durability of the protective coating 10. The modified polysiloxane polymer is provided with an antistatic resin component, which can reduce the adverse effects of static electricity accumulation during use of the protective coating 10 for a touch panel. In addition, the protective coating 10 also includes a second coating 12 provided on the side of the first coating 11 facing away from the substrate 20, and the second coating 12 is provided to include a perfluoropolyether polymer. The second coating 12 with the perfluoropolyether polymer as the surface layer can make the protective coating 10 have good anti-fouling and hydrophobic effects, which is beneficial to improving the stability and life of the display using the protective coating 10.

[0076] According to some embodiments of the present application, the coating adhesion resin component includes -(CH2) a CHCOOH-, a≥1 and is an integer.

[0077] For example, the value of a can be 1, in which case the coating adhesion resin component includes -CH2CHCOOH-; the value of a can be 2, in which case the coating adhesion resin component includes -CH2CH2CHCOOH-; the value of a can be 3, in which case the coating adhesion resin component includes -CH2CH2CH2CHCOOH-; the value of a can be 4, in which case the coating adhesion resin component includes -CH2CH2CH2CH2CHCOOH-.

[0078] wherein, by making the adhesive resin component include -(CH2) a CHCOOH-, the adhesive resin component contains reactive polar groups such as carboxyl groups, which can react with active groups such as hydroxyl groups and oxygen anions on the surface of the substrate 20 to form chemical bonds, thereby enhancing the adhesion of the modified polysiloxane polymer.

[0079] In the above technical solution, by making the adhesive resin component include -(CH2) a CHCOOH- can enhance the adhesion of the first coating layer 11, thereby enhancing the adhesion between the protective coating layer and the substrate.

[0080] According to some embodiments of the present application, the antistatic resin component includes -(CH2) b O-, b≥1 and is an integer.

[0081] For example, the value of b may be 1, in which case the antistatic resin component includes -CH2O-; the value of b may be 2, in which case the antistatic resin component includes -CH2CH2O-; the value of b may be 3, in which case the antistatic resin component includes -CH2CH2CH2O-.

[0082] By making the antistatic resin component include -(CH2) b O-, the antistatic resin component contains polar groups such as ether groups. These groups can combine with moisture in the air through hydrogen bonds to form conductive channels, so that static charges can be quickly removed and static electricity accumulation can be prevented.

[0083] In the above technical solution, by making the antistatic resin component include -(CH2) b O-, which can make the protective coating 10 have better antistatic performance.

[0084] According to some embodiments of the present application, the molecular structure of the coating-modified polysiloxane polymer is:

[0085] Wherein, R1 is one of hydroxyl, carboxyl, epoxy or amino, R2 is one of methyl, ethyl, aromatic group or hydroxyl, 60≤x≤150, 24≤y≤60, 33≤m≤83 and x, y and m are all integers.

[0086] For example, R1 may be a hydroxyl group, a carboxyl group, an epoxy group, or a carboxyl group; R2 may be a methyl group, an ethyl group, an aromatic group, or a hydroxyl group.

[0087] Where x is the number of siloxane chains in the modified polysiloxane polymer, y is the number of adhesive resin components in the modified polysiloxane polymer, and m is the number of antistatic resin components in the modified polysiloxane polymer. For example, x can be 60, 85, 113, 129, 150, etc.; y can be 24, 35, 47, 53, 60, etc.; and m can be 33, 45, 60, 74, 83, etc.

[0088] In the above technical solution, by setting the molecular structure of the modified polysiloxane polymer to the above molecular structure, the first coating layer 11 can have better adhesion and antistatic properties.

[0089] According to some embodiments of the present application, in the infrared spectrum of the protective coating 10: at 1080 cm -1There is a characteristic peak corresponding to -Si-O-Si- at ​​1100 cm -1 ~1300cm -1 There is a characteristic peak corresponding to CF at 900 cm -1 ~1000cm -1 There is a characteristic peak corresponding to COC at 700 cm -1 ~800cm -1 There are characteristic peaks corresponding to aromatic rings.

[0090] Here, -Si-O-Si- represents silicone contained in the modified polysiloxane polymer, CF represents fluorine contained in the perfluoropolyether polymer, and COC represents an ether bond contained in the perfluoropolyether polymer.

[0091] In the above technical solution, by having characteristic peaks corresponding to -Si-O-Si-, CF, COC and aromatic rings at corresponding positions in the infrared spectrum, the adverse effects of static electricity accumulation during use of the protective coating 10 for a touch panel can be reduced, and the protective coating 10 can also have good anti-fouling and hydrophobic effects, which is beneficial to improving the stability and life of the display 10 using the protective coating.

[0092] According to some embodiments of the present application, in the infrared spectrum of the protective coating: at 1700 cm -1 ~1725cm -1 There is a characteristic peak corresponding to -COOH.

[0093] Here, -COOH represents the carboxyl group of the adhesive resin component in the modified polysiloxane polymer.

[0094] In the above technical solution, the presence of a characteristic peak of -COOH at the corresponding position in the infrared spectrum can enhance the adhesion of the first coating 11, thereby enhancing the adhesion between the protective coating 10 and the substrate and improving the durability of the protective coating 10.

[0095] According to some embodiments of the present application, the surface contact angle of the protective coating 10 is between 100° and 128°. The size of the surface contact angle directly reflects the degree of wettability of the solid by the liquid. If the surface contact angle is less than 90°, the solid surface is hydrophilic; if the surface contact angle is greater than 90°, the solid surface is hydrophobic. For example, the surface contact angle of the protective coating 10 can be 100°, 105°, 110°, 115°, 120°, 128°, etc.

[0096] In the above technical solution, by setting the contact angle of the surface of the protective coating 10 to 100°~128°, the surface of the protective coating 10 has good hydrophobicity and anti-fouling properties, thereby achieving anti-fouling and hydrophobic effects, and facilitating the cleaning of the protective coating 10.

[0097] According to some embodiments of the present application, referring to Figure 5 After the protective coating 10 undergoes an aging durability test for a preset time, the contact angle of the surface of the protective coating 10 decreases by less than 5°.

[0098] For example, the aging durability test may include at least one of a xenon lamp aging test, a heat aging test, and a damp heat aging test. For the xenon lamp aging test, the preset time of the test is less than or equal to 1500 hours, wherein 1500 hours can correspond to 5 to 8 years of actual use time of the simulated vehicle; for the heat aging test, the preset time of the test is less than or equal to 500 hours, wherein 500 hours can correspond to 5 to 8 years of actual use time of the simulated vehicle; for the damp heat aging test, the preset time of the test is less than or equal to 504 hours, wherein 504 hours can correspond to 5 to 8 years of actual use time of the simulated vehicle. For example, the xenon lamp aging test is to pass a glass specimen coated with the protective coating 10 through a xenon lamp at a temperature of (0.55±0.02)W / (m 2 The heat aging test is to place the glass specimen coated with the protective coating 10 in an environment of 85°C for 500 hours; the damp heat aging test is to place the glass specimen coated with the protective coating 10 in an environment of 95% relative humidity and 65°C for 504 hours.

[0099] For example, the xenon lamp aging durability test that the protective coating 10 has undergone can be 500 hours, 600 hours, 700 hours, 800 hours, 1000 hours, 1460 hours, 1500 hours, etc. The heat aging durability test that the protective coating 10 has undergone can be 400 hours, 450 hours, 468 hours, 500 hours, etc. The damp heat aging durability test that the protective coating 10 has undergone can be 450 hours, 468 hours, 500 hours, 504 hours, etc.

[0100] In the above technical solution, after the protective coating 10 undergoes an aging durability test of greater than or equal to 500 hours, the contact angle of the surface of the protective coating 10 decreases by less than 5°, so that the protective coating 10 can still have good hydrophobicity and anti-fouling properties after long-term use.

[0101] According to some embodiments of the present application, the root mean square roughness of the surface of the protective coating 10 is 3.5 nm. The smaller the surface roughness, the smoother the surface; the larger the surface roughness, the rougher the surface.

[0102] In the above technical solution, by making the root mean square roughness of the surface of the protective coating 10 be 3.5 nm, the surface of the protective coating 10 can be made smooth, making it difficult for liquid to remain on the surface of the protective coating 10; and when the protective coating 10 is used on the touch panel of the display, the user can have a good tactile feeling.

[0103] According to some embodiments of the present application, referring to Figure 1 , the thickness d3 of the protective coating 10 is 30 to 50 nm.

[0104] For example, the thickness of the protective coating 10 can be 30 nm, 35 nm, 40 nm, 45 nm, 50 nm, etc. If the thickness of the protective coating 10 is too thin, the protective effect is limited, the lifespan is short, and the preparation process is more difficult; if the thickness of the protective coating 10 is too thick, material is wasted and the thickness is large.

[0105] In the above technical solution, by setting the thickness of the protective coating 10 to 30-50 nm, the protective coating 10 can have a better protective effect.

[0106] According to some embodiments of the present application, referring to Figure 1 The thickness d1 of the first coating layer 11 is 10 to 30 nm, and the thickness of the second coating layer 12d2 is 20 to 40 nm.

[0107] For example, the thickness of the first coating layer 11 may be 10 nm, 15 nm, 20 nm, 25 nm, 30 nm, etc.; the thickness of the second coating layer 12 may be 20 nm, 25 nm, 30 nm, 35 nm, 40 nm, etc.

[0108] In the above technical solution, by setting the thickness of the first coating 11 to 10 to 30 nm, the first coating 11 can have stronger adhesion to the substrate 20 and better antistatic properties; by setting the thickness of the second coating 12 to 20 to 40 nm, the protective coating 10 can have better anti-fouling and hydrophobic effects.

[0109] According to some embodiments of the present application, the modified polysiloxane polymer is soluble in ethylene glycol, propylene glycol, toluene, chloroform, or ether; and the perfluoropolyether polymer is soluble in acetone, toluene, or perfluoropropane.

[0110] For example, the modified polysiloxane polymer can be dissolved in one of ethylene glycol, propylene glycol, toluene, chloroform or ether; and the perfluoropolyether polymer can be dissolved in one of acetone, toluene or perfluoropropane.

[0111] In the above technical solution, by making the modified polysiloxane polymer soluble in ethylene glycol, propylene glycol, toluene, chloroform or ether, and making the perfluoropolyether polymer soluble in acetone, toluene or perfluoropropane, in the process of preparing the protective coating 10, the modified polysiloxane polymer can be dissolved in ethylene glycol, propylene glycol, toluene, chloroform or ether to form a fluid substance, which is convenient for coating it on the substrate 20; the perfluoropolyether polymer can be dissolved in acetone, toluene or perfluoropropane to form a fluid substance, which is convenient for coating it on the first coating 11, thereby making the preparation process of the protective coating 10 less difficult and the prepared protective coating 10 more uniform.

[0112] refer to Figure 2 According to the method for preparing the protective coating 10 according to the second embodiment of the present application, the protective coating 10 is the protective coating 10 according to the first embodiment of the present application. The method for preparing the protective coating 10 includes:

[0113] Plasma cleaning is performed on the surface of the substrate 20. For example, the plasma cleaning time is 5 to 10 minutes. Plasma cleaning can remove surface grease and hydrocarbon contaminants and activate surface reactive groups, thereby facilitating the formation of chemical bonds between the polar groups in the first coating 11 and the hydroxyl and carboxyl groups on the surface of the substrate 20, thereby enhancing the adhesion of the first coating 11.

[0114] A first coating layer 11 is formed on the surface of the substrate 20 using a spin coating process. The first coating layer 11 can be applied by dissolving in an organic solvent to facilitate adhesion to the surface of the substrate 20. The spin coating process rotates the substrate at high speed, so that the fluid material coated on the substrate 20 forms a uniform thin film under the action of centrifugal force. The spin coating process can make the first coating layer 11 adhered to the surface of the substrate 20 more uniform, which is beneficial for the subsequent adhesion of the second coating layer 12 to the first coating layer 11 and improves the adhesion of the second coating layer 12.

[0115] The second coating layer 12 is formed on the surface of the first coating layer 11 by using an evaporation process. The second coating layer 12 can be applied by dissolving in an organic solvent to facilitate adhesion to the surface of the first coating layer 11. The evaporation process can be performed in a vacuum environment to prevent the influence of impurities and gas molecules in the air on the film formation process of the second coating layer 12, thereby ensuring the purity and density of the second coating layer 12.

[0116] The substrate 20 formed with the first coating 11 and the second coating 12 is dried at a first drying temperature for a first preset time to form a protective coating 10 on the substrate 20. By drying the first coating 11 at the first drying temperature, it is convenient for the first coating 11 to form a film, and it is also convenient to apply the second coating 12 to the surface of the first coating 11, thereby preventing the first coating 11 and the second coating 12 from mixing.

[0117] The organic solvent used in the process of preparing the first coating 11 may be ethylene glycol, propylene glycol, toluene, chloroform or ether; the organic solvent used in the process of preparing the first coating 11 may be acetone, toluene or perfluoropropane.

[0118] According to the preparation method of the protective coating 10 of the embodiment of the present application, by plasma cleaning the surface of the substrate 20, surface grease and hydrocarbon dirt can be removed, and the surface reactive groups can be activated, so that the polar groups in the first coating 11 form chemical bonds with the hydroxyl groups, oxygen anion activation groups, etc. on the surface of the substrate 20, thereby enhancing the adhesion of the first coating 11; the first coating 11 is formed on the surface of the coating substrate 20 by a spin coating process, which can make the first coating 11 attached to the surface of the substrate 20 more uniform, which is conducive to the subsequent attachment of the second coating 12 to the first coating 11, thereby improving the adhesion of the second coating 12; the coating of the second coating 12 in a vacuum environment by an evaporation process can avoid the influence of impurities and gas molecules in the air on the film-forming process of the second coating 12, thereby ensuring the purity and density of the second coating 12.

[0119] According to some embodiments of the present application, a spin coating process is used to form the first coating layer 11 on the surface of the substrate. The process parameters of the spin coating process include: a spin coating speed of 500 to 2000 rpm and a spin coating time of 20 to 30 s.

[0120] For example, the spin coating speed can be 500 rpm, 1000 rpm, 1500 rpm, 2000 rpm, etc.; the spin coating time can be 20 s, 22 s, 24 s, 26 s, 28 s, 30 s, etc. If the spin coating speed is too fast or too slow, the first coating layer 11 on the substrate 20 will be unevenly coated; if the spin coating time is too long, the spin coating efficiency will be too low.

[0121] In the above technical solution, by setting the spin coating speed to 500-2000 rpm, the first coating 11 on the substrate 20 can be made more uniform and have stronger adhesion to the substrate 20; by setting the spin coating time to 20-30s, the spin coating efficiency of the first coating 11 can be higher.

[0122] According to some embodiments of the present application, the second coating 12 is formed on the surface of the first coating 11 by an evaporation process, and the process parameters of the evaporation process include: an evaporation rate of 0.3 to 0.5 nm / s, a vacuum degree of 3 to 5 MPa, and a crucible temperature of 380°C to 400°C.

[0123] For example, the evaporation rate can be 0.3nm / s, 0.35nm / s, 0.4nm / s, 0.45nm / s, 0.5nm / s, etc. If the evaporation rate is too low, the particle energy during the vacuum evaporation process is low, the collision probability is small, and the formed second coating 12 is relatively loose, which reduces the density and adhesion of the second coating 12; if the evaporation rate is too high, it may affect the uniformity of the second coating 12.

[0124] For another example, the vacuum degree can be 3MPa, 3.5MPa, 4MPa, 4.5MPa, 5MPa, etc. If the vacuum degree is too low, the gas molecules will interfere with the evaporation of the second coating 12, which may cause problems such as pitting and bubbles on the surface of the second coating 12 coated on the first coating 11; if the vacuum degree is too high, the environmental requirements are too high, which increases the cost of use.

[0125] For another example, the crucible temperature can be 380°C, 385°C, 390°C, 395°C, 400°C, etc. If the evaporation temperature is too low, the particle energy during the vacuum evaporation process is low, the collision probability is small, and the formed second coating 12 is relatively loose, which reduces the density and adhesion of the second coating 12; if the evaporation temperature is too high, it may affect the uniformity of the second coating 12.

[0126] In the above technical solution, by setting the evaporation rate to 0.3-0.5 nm / s, the evaporation process can be made more stable, and the second coating 12 can have good density; by setting the vacuum degree to 3-5 MPa, the content of gas molecules is reduced, thereby reducing the influence of gas molecules on the second coating 12; by setting the crucible temperature to 380°C-400°C, the second coating 12 can be stabilized in a gas state, maintaining the stability of the evaporation process, thereby making the second coating 12 have good density.

[0127] According to some embodiments of the present application, after the first coating 11 is formed on the surface of the substrate 20 and before the second coating 12 is formed on the surface of the first coating 11, the first coating 11 is dried at a second drying temperature for a second preset time, and the second preset time is less than the first preset time.

[0128] For example, the second drying temperature may be 160° C. and the second preset time may be 30 minutes. If the second preset time for drying the coating is longer than the first preset time for drying the coating, the first coating 11 may be dried and cracked due to the accumulated drying time being too long.

[0129] In the above technical solution, after the spin coating process is completed and before the second coating layer 12 is formed on the surface of the first coating layer 11, the first coating layer 11 is dried at a second drying temperature for a second preset time, which can volatilize the organic solvent in the first coating layer 11 and help accelerate the curing and film formation of the first coating layer 11; by making the second preset time for drying the first coating layer 11 shorter than the first preset time for drying the protective coating layer 10 as a whole, it can prevent the first coating layer 11 from drying and cracking due to the cumulative drying time of too long, which is beneficial to improving the molding quality of the protective coating layer 10.

[0130] According to some embodiments of the present application, the first drying temperature is 130-150° C., and the first preset time is 2-3 hours.

[0131] For example, the first drying temperature may be 130°C, 135°C, 140°C, 145°C, 150°C, etc.; the first preset drying time may be 2 hours, 2 hours and 20 minutes, 2 hours and 40 minutes, 3 hours, etc. If the first drying temperature of the protective coating 10 is too high or the first preset drying time is too long, the protective coating 10 may dry out and crack; if the first drying temperature of the protective coating 10 is too low or the first preset drying time is too short, the conditions for evaporation of the organic solvent may not be met.

[0132] In the above technical solution, the organic solvent in the protective coating 10 can be volatilized, which is beneficial to accelerate the curing film formation of the protective coating 10 and prevent the protective coating 10 from drying out and cracking due to excessive temperature.

[0133] The touch panel according to the third embodiment of the present application includes: a panel body and a protective coating 10 according to the first embodiment of the present application. The protective coating 10 covers the outer surface of the coated panel body. The protective coating 10 is a transparent coating or a light-transmitting coating. The panel body constitutes a substrate 20. The touch panel can be a capacitive touch panel or a resistive touch panel. For example, the panel body is a transparent glass or resin member. The first coating 11 is connected to the panel body, and the second coating 12 is provided on the side of the first coating 11 away from the panel body.

[0134] According to the touch panel of the embodiment of the present application, the protective coating 10 is provided. The protective coating 10 has good anti-fouling and hydrophobic effects and strong adhesion to the substrate 20. When the protective coating 10 is used for the touch panel of the display, the adverse effects caused by static electricity accumulation can be reduced, which is beneficial to improving the stability and life of the display using the protective coating 10.

[0135] A display according to an embodiment of the fourth aspect of the present application includes: a touch panel coated according to an embodiment of the third aspect of the present application, wherein the display may be a cathode ray tube display, a plasma display, or a liquid crystal display.

[0136] According to the display of the embodiment of the present application, the above-mentioned touch panel is provided. The protective coating 10 used in the touch panel has good anti-fouling and hydrophobic effects, and has strong adhesion to the substrate 20. In addition, when the protective coating 10 is used for the touch panel of the display, the adverse effects caused by static electricity accumulation can be reduced, which is beneficial to improving the stability and life of the display using the protective coating 10.

[0137] A vehicle according to an embodiment of the fifth aspect of the present application includes a display coated according to an embodiment of the fourth aspect of the present application. The vehicle may be a fuel vehicle, a gas vehicle, a new energy vehicle, or a rail vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle, or an extended-range vehicle.

[0138] According to the vehicle of the embodiment of the present application, there is provided with the above-mentioned display. The protective coating 10 used in the display has good anti-fouling and hydrophobic effects, and has strong adhesion to the substrate 20. In addition, when the protective coating 10 is used for the touch panel of the display, it can reduce the adverse effects of static electricity accumulation and prevent static electricity from interfering with the vehicle's driving, which is beneficial to improving the stability and life of the display using the protective coating 10.

[0139] Reference below Figure 1-Figure 7 The present application describes a protective coating 10 according to various embodiments.

[0140] Example 1,

[0141] In the modified polysiloxane resin structure used in the protective coating 10 in Example 1, x=60, y=24, and m=33, that is, the molecular structure of the modified polysiloxane polymer is:

[0142]

[0143] The steps for preparing the protective coating 10 in Example 1 are as follows:

[0144] Step (1) uses a glass test piece as a substrate 20, and uses plasma cleaning for 10 minutes to remove surface grease and hydrocarbon dirt, and activates the surface to introduce reactive groups such as oxygen-containing polar groups (such as hydroxyl groups and oxygen anion groups);

[0145] Step (2) forming a first coating layer 11 on the glass test piece by a spin coating process: the spin coating speed is 1000 rpm, the spin coating time is 30 s, the spin coating thickness is 25 nm, and after the spin coating is completed, pre-baking is carried out at 160 h for 30 min, and finally the first coating layer 11 is formed on the surface of the glass test piece treated in step (1);

[0146] In step (3), a second coating layer 12 is formed on the first coating layer 11 by using an evaporation process: an evaporation rate of 0.5 nm / s, a vacuum degree of 3 mPa, and a crucible temperature of 400°C.

[0147] Step (4) drying the glass sample coated with the first coating 11 and the second coating 12 in step (3) at 140° C. for 3 hours to finally produce a protective coating 10.

[0148] Example 2,

[0149] In the modified polysiloxane resin structure used in the protective coating 10 of Example 2, x=87, y=33, and m=54, that is, the molecular structure of the modified polysiloxane polymer is:

[0150]

[0151] The steps for preparing the protective coating 10 in Example 2 are the same as those in Example 1, and are not described again here.

[0152] Example 3,

[0153] In the modified polysiloxane resin structure used in the protective coating 10 in Example 3, x=121, y=45, and m=72, that is, the molecular structure of the modified polysiloxane polymer is:

[0154]

[0155] The steps for preparing the protective coating 10 in Example 3 are the same as those in Example 1, and are not described again here.

[0156] Example 4,

[0157] In the modified polysiloxane resin structure used in the protective coating 10 in Example 4, x=100, y=37, and m=54, that is, the molecular structure of the modified polysiloxane polymer is:

[0158]

[0159] The steps for preparing the protective coating 10 in Example 4 are the same as those in Example 1 above, and are not described again here.

[0160] refer to Figure 3 , Figure 3 This is a SEM image of the surface of the protective coating 10 of Example 4, from which it can be seen that its microstructure is flat and smooth.

[0161] Example 5,

[0162] In the modified polysiloxane resin structure used in the protective coating 10 in Example 5, x=150, y=60, and m=83, that is, the molecular structure of the modified polysiloxane polymer is:

[0163]

[0164] The steps for preparing the protective coating 10 in Example 5 are the same as those in Example 1 above, and are not described again here.

[0165] Reference below Figure 4-Figure 7 The performance testing and evaluation methods of the protective coating 10 of Example 4 are described.

[0166] The protective coating 10 of Example 4 was subjected to the following performance tests:

[0167] (1) Hydrophobicity test: The hydrophobicity test of the protective coating 10 of Example 4 was conducted according to the GB / T 42694-2023 standard. Figure 4 , it can be seen that the surface contact angle of the glass specimen not coated with the protective coating 10 (i.e., the blank glass specimen) is 33.115°; the surface contact angle of the glass specimen coated with the protective coating 10 is 118.052°. This indicates that after the protective coating 10 is applied to the glass specimen, its surface free energy is greatly reduced, the hydrophobicity is improved, and rainwater is not easy to accumulate and stay on the surface, and is easier to remove;

[0168] (2) Durability reliability test: reference Figure 5 It can be seen that the glass specimen coated with the protective coating 10 has good thermal aging (85℃ / 500h) - the glass specimen coated with the protective coating 10 is placed in an environment of 85℃ for 500h, damp heat durability (65℃ / 95RH / 504h) - the glass specimen coated with the protective coating 10 is placed in an environment of 95% relative humidity and temperature of 65℃ for 504h, abrasion resistance (10N / 5K times) - the glass specimen coated with the protective coating 10 is polished 5,000 times with a force of 10N / time, and 1500h xenon lamp aging ((0.55±0.02)W / (m 2 ·nm))——The glass test piece coated with the protective coating 10 is passed through a xenon lamp at (0.55±0.02)W / (m 2After irradiation with a radiation intensity of 100 nm for 1500 h, the surface contact angle decreased by less than 5°, and the degree of contact angle reduction was not obvious, indicating that its hydrophobicity remained basically unchanged after environmental durability in real applications, and it has excellent long-term durability.

[0169] (3) Antifouling performance test: reference Figure 6 , it can be seen that the glass test piece coated with the protective coating 10 is greatly improved in removing dust deposits. When the clean water droplets on the glass test piece coated with the protective coating 10 roll down the surface, they carry away the dust on the surface, which has a good cleaning effect. However, for the glass test piece not coated with the protective coating 10, the clean water droplets spread on the glass surface and mix with the dust, making it difficult to clean. Figure 7 It can be seen that after being contaminated with straw mushroom dark soy sauce and tomato sauce and exposed to simulated outdoor sunlight (80°C / 48h), the glass specimen coated with the protective coating 10 is easier to clean after being simply wiped with clean water and cleaning solution, while the glass specimen not coated with the protective coating 10 cannot be completely cleaned and leaves traces of contamination.

[0170] In this application, a plurality refers to two or more.

[0171] In this application, unless otherwise expressly defined, the terms "mounted," "connected," and "connected" should be interpreted broadly. For example, they can refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. A person of ordinary skill in the art will understand the specific meanings of these terms in this application.

[0172] The terms "first," "second," "third," "fourth," etc. (if any) in this application are used to distinguish similar objects and are not necessarily used to describe a particular sequential order.

[0173] The term "and / or" in this application simply describes an association between related objects, indicating that three possible relationships exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this application generally indicates that the related objects are in an "or" relationship.

[0174] Unless otherwise specified, all steps of the present application may be performed sequentially or randomly. For example, a statement that the method includes steps A and B indicates that the method may include steps A and B performed sequentially, or steps B and A performed sequentially. For example, a statement that the method may also include step C indicates that step C may be added to the method in any order, for example, the method may include steps A, B, and C, or steps A, C, and B, or steps C, A, and B, etc.

[0175] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A protective coating, characterized in that: include: a first coating layer comprising a modified polysiloxane polymer and configured to be bonded to a substrate, wherein the modified polysiloxane polymer comprises an adhesive resin component and an antistatic resin component; The second coating layer is disposed on a side of the first coating layer away from the substrate, and the second coating layer comprises a perfluoropolyether polymer.

2. The protective coating according to claim 1, characterized in that The adhesion resin component includes -(CH2) a CHCOOH-, a≥1 and is an integer.

3. The protective coating according to claim 1, characterized in that The antistatic resin component includes -(CH2) b O-, b≥1 and is an integer.

4. The protective coating according to any one of claims 1 to 3, characterized in that: The molecular structural formula of the modified polysiloxane polymer is: Wherein, R1 is one of hydroxyl, carboxyl, epoxy or amino, R2 is one of methyl, ethyl, aromatic group or hydroxyl, 60≤x≤150, 24≤y≤60, 33≤m≤83 and x, y and m are all integers.

5. The protective coating according to claim 1, characterized in that In the infrared spectrum of the protective coating: at 1080 cm -1 There is a characteristic peak corresponding to -Si-O-Si- at ​​1100 cm -1 ~1300cm -1 There is a characteristic peak corresponding to CF at 900 cm -1 ~1000cm -1 There is a characteristic peak corresponding to COC at 700 cm -1 ~800cm -1 There are characteristic peaks corresponding to aromatic rings.

6. The protective coating according to claim 5, characterized in that In the infrared spectrum of the protective coating: at 1700 cm -1 ~1725cm -1 There is a characteristic peak corresponding to -COOH.

7. The protective coating according to claim 1, characterized in that The contact angle of the surface of the protective coating is 100° to 128°.

8. The protective coating according to claim 1, wherein After the protective coating undergoes an aging durability test for a preset time, the contact angle of the surface of the protective coating decreases by less than 5°.

9. The protective coating according to claim 1, characterized in that The root mean square roughness of the surface of the protective coating is 3.5 nm.

10. The protective coating according to claim 1, characterized in that The thickness of the protective coating is 30 to 50 nm.

11. The protective coating according to claim 1, wherein The thickness of the first coating layer is 10-30 nm, and the thickness of the second coating layer is 20-40 nm.

12. The protective coating according to claim 1, wherein The modified polysiloxane polymer is soluble in ethylene glycol, propylene glycol, toluene, chloroform or ether; and the perfluoropolyether polymer is soluble in acetone, toluene or perfluoropropane.

13. A method for preparing a protective coating, characterized in that: The protective coating is the protective coating according to any one of claims 1 to 12, and the preparation method of the protective coating comprises: Cleaning the surface of the substrate; forming the first coating on the surface of the substrate; forming the second coating layer on the surface of the first coating layer; The substrate having the first coating layer and the second coating layer formed thereon is dried at a first drying temperature for a first preset time to form the protective coating layer on the substrate.

14. The method for preparing a protective coating according to claim 13, wherein: The first coating layer is formed on the surface of the substrate by a spin coating process, and the process parameters of the spin coating process include: a spin coating speed of 500 to 2000 rpm and a spin coating time of 20 to 30 seconds; And / or, the second coating layer is formed on the surface of the first coating layer by an evaporation process, and the process parameters of the evaporation process include: an evaporation rate of 0.3 to 0.5 nm / s, a vacuum degree of 3 to 5 MPa, and a crucible temperature of 380 to 400°C.

15. The method for preparing a protective coating according to claim 13, wherein: After the first coating is formed on the surface of the substrate and before the second coating is formed on the surface of the first coating, the first coating is dried at a second drying temperature for a second preset time, and the second preset time is less than the first preset time.

16. The method for preparing a protective coating according to claim 13, wherein: The first drying temperature is 130-150° C., and the first preset time is 2-3 hours.

17. A touch panel, characterized in that: include: Panel body; The protective coating according to any one of claims 1-12, wherein the protective coating covers the outer surface of the panel body, and the panel body constitutes the substrate.

18. A display, characterized in that: include: The touch panel according to claim 17.

19. A vehicle, characterized in that: include: The display according to claim 18.

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