Anti-glare glass cover for vehicle-mounted display screen and preparation method thereof

Abstract

The present invention proposes an anti-glare glass cover plate for a vehicle-mounted display screen and a preparation method thereof, wherein the preparation method of the anti-glare glass cover plate comprises: pre-treating the surface to be treated of the glass cover plate to form a glass cover plate with an aminosilane coupling agent bonded to the surface; coating the surface of the glass cover plate with the aminosilane coupling agent bonded to the surface with a siloxane composition, and curing the surface to form a film to obtain the anti-glare glass cover plate. The present invention proposes an anti-glare glass cover plate for a vehicle-mounted display screen and a preparation method thereof, wherein a surface coating having a certain roughness is formed on the glass cover plate, thereby obtaining an anti-glare glass cover plate for a vehicle-mounted display screen with good anti-glare effect and high transmittance.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle-mounted display screen glass production, and in particular to an anti-glare glass cover plate for a vehicle-mounted display screen and a preparation method thereof. Background Art

[0002] Glare is an undesirable lighting phenomenon. For example, when you look at the car display screen under strong light, you will not be able to see the content clearly due to the reflection of light. In order to reduce the impact of reflected light, the surface of the glass cover of the car display screen needs to be specially treated to change the original mirror reflection of the glass into diffuse reflection. This kind of glass is called anti-glare glass or AG glass. Anti-glare glass cover can significantly improve the viewing angle of the picture, reduce screen reflection, make the image clearer and the color more saturated, and it is increasingly used in products such as display screens.

[0003] In the prior art, in order to obtain an anti-glare glass cover for a vehicle display screen, hydrofluoric acid is usually used to etch the glass surface. Although the glass surface is corroded by hydrofluoric acid, the tiny bumps and depressions produced after the corrosion can convert the original mirror reflection into diffuse reflection, thereby achieving an anti-glare effect. However, as the reaction proceeds, the concentration of fluorosilicic acid produced by hydrofluoric acid in the etching solution increases. After exceeding the critical point of fluorosilicic acid solubility, white fluorosilicic acid crystals are formed at the edge of the glass, which isolate the glass and hydrofluoric acid, affecting the etching action in the area where the crystals are located, resulting in inconsistent etching degrees in different areas of the glass surface. As a result, the anti-glare surface of the glass is relatively rough, and the transmittance and contrast are significantly reduced, affecting the final performance of the product.

[0004] At present, there is another common method to obtain an anti-glare glass cover for a vehicle display screen by coating the glass surface. Although the anti-glare effect of coated anti-glare glass is good, the production cost is high, and the coating is easy to fall off, leaving scratches on the surface, etc., which affects the transparency.

[0005] In summary, it is of great significance to avoid the shortcomings of the prior art and obtain an anti-glare glass cover for a vehicle-mounted display screen. Summary of the invention

[0006] Based on the technical problems existing in the background technology, the present invention proposes an anti-glare glass cover plate for a vehicle display screen and a preparation method thereof. By forming a surface coating with a certain roughness on the glass cover plate, an anti-glare glass cover plate for a vehicle display screen with good anti-glare effect and high transmittance is obtained.

[0007] The present invention provides a method for preparing an anti-glare glass cover for a vehicle-mounted display screen, comprising the following steps:

[0008] (1) pre-treating the surface of the glass cover plate to be treated to form a glass cover plate with an aminosilane coupling agent bonded to the surface;

[0009] (2) The siloxane composition is coated on the surface of the glass cover plate bonded with the aminosilane coupling agent, and after curing to form a film, the anti-glare glass cover plate for the vehicle display screen is obtained.

[0010] Preferably, the pre-treating the surface to be treated of the glass cover plate specifically comprises: coating an aminosilane coupling agent solution on the surface to be treated of the glass cover plate, and after heat treatment, forming a glass cover plate with an aminosilane coupling agent bonded to the surface.

[0011] Preferably, the aminosilane coupling agent solution is obtained by adding an aminosilane coupling agent into an organic solvent and dissolving and mixing the mixture;

[0012] Preferably, the aminosilane coupling agent is at least one of 3-aminopropyltriethoxysilane, N-(2-aminoethyl)-3-aminopropyltrimethoxysilane or diethylenetriaminopropyltrimethoxysilane;

[0013] Preferably, the organic solvent is at least one of methanol, ethanol, n-propanol, isopropanol or n-butanol.

[0014] Preferably, the heat treatment temperature is 60-120° C. and the time is 5-15 min.

[0015] Preferably, the siloxane composition comprises: tetraalkoxysilane, an acidic catalyst, a metal catalyst and a solvent;

[0016] Preferably, the siloxane composition comprises, by weight percentage: 5-25 wt % tetraalkoxysilane, 0.1-1 wt % acid catalyst, 0.01-0.1 wt % metal catalyst and the remainder solvent.

[0017] Preferably, the tetraalkoxysilane is tetramethoxysilane or tetraethoxysilane; the acid catalyst is hydrochloric acid or acetic acid; the metal catalyst is dibutyltin dilaurate or aluminum acetylacetonate; and the solvent is water and at least one of methanol, ethanol, n-propanol, isopropanol or n-butanol.

[0018] Preferably, the curing temperature is 120-160°C and the time is 60-120min;

[0019] Preferably, the thickness of the cured film is no more than 10 μm.

[0020] The present invention also provides an anti-glare glass cover for a vehicle-mounted display screen, which is prepared by the above-mentioned preparation method.

[0021] The invention provides an anti-glare glass cover plate for a vehicle-mounted display screen and a preparation method thereof. An aminosilane coupling agent is chemically bonded to a glass cover plate to form a glass cover plate with the aminosilane coupling agent on the surface, and then a siloxane composition is coated on the glass cover plate with the aminosilane coupling agent on the surface. The siloxane composition is cured to form a film on the glass cover plate to obtain a sol coating with a microscopic concave-convex structure. In this way, the obtained glass cover plate has a good anti-glare effect without reducing the resolution of a screen observed through the glass cover plate.

[0022] In the method for preparing an anti-glare glass cover for a vehicle display screen proposed by the present invention, on the one hand, an aminosilane coupling agent is bonded to the surface of the glass cover in advance, and when a siloxane composition is coated on the surface and cured, since the amino group can be acidified into an ammonium salt, the siloxane compound can be adsorbed, so that the SiO2 sol generated by the hydrolysis of the siloxane is adsorbed near the ammonium salt, so that a SiO2 sol accumulation structure surrounding the aminosilane coupling agent bonding area can be formed on the surface of the glass cover, and finally an anti-glare surface with a uniform roughness structure is formed on the glass cover, which can not only obtain excellent anti-glare properties, but also will not affect the transparency of its vehicle display screen, thereby improving its recognizability as a display glass. DETAILED DESCRIPTION

[0023] The technical solutions of the present invention are described in detail below through specific embodiments. However, it should be clearly stated that these embodiments are for illustration only and are not to be construed as limiting the scope of the present invention.

[0024] The glass cover plate used in the following embodiments is selected from a substrate whose original material is white glass. Specifically, the white glass substrate is processed by CNC processing technology and formed into a glass cover plate of designed size and shape.

[0025] Example 1

[0026] An anti-glare glass cover for a vehicle-mounted display screen, the preparation method of which comprises:

[0027] After scrubbing the surface of the glass cover plate to be treated with an aqueous solution of sodium hydroxide having a content of 5 wt%, firstly ultrasonically cleaning it with pure water for 15 minutes, then ultrasonically cleaning it with ethanol for 2 minutes, and finally rinsing it with pure water and drying it with nitrogen to obtain a cleaned glass cover plate;

[0028] A 4 wt % 3-aminopropyltriethoxysilane ethanol solution (prepared by adding 3-aminopropyltriethoxysilane into ethanol and stirring to mix uniformly) is thinly coated on the surface to be treated of the cleaned glass cover plate (the coating thickness is not greater than 1 μm), baked at 90° C. for 8 min, rinsed with acetone, and dried to obtain a glass cover plate with an aminosilane coupling agent bonded to the surface;

[0029] 10 mL of tetraethoxysilane, 1 mL of concentrated hydrochloric acid and 0.05 mL of dibutyltin dilaurate were added to a mixed solvent consisting of 5 mL of water and 50 mL of ethanol, and the mixture was stirred and mixed to obtain a siloxane composition;

[0030] The siloxane composition is coated on the surface to be treated of the glass cover plate with the aminosilane coupling agent bonded to the surface (coating thickness is about 3 μm), and baked at 140° C. for 90 minutes to obtain the anti-glare glass cover plate for vehicle display screens.

[0031] Example 2

[0032] An anti-glare glass cover for a vehicle-mounted display screen, the preparation method of which comprises:

[0033] After scrubbing the surface of the glass cover plate to be treated with an aqueous solution of sodium hydroxide having a content of 5 wt%, firstly ultrasonically cleaning it with pure water for 15 minutes, then ultrasonically cleaning it with ethanol for 2 minutes, and finally rinsing it with pure water and drying it with nitrogen to obtain a cleaned glass cover plate;

[0034] A 4 wt % ethanol solution of N-(2-aminoethyl)-3-aminopropyltrimethoxysilane (prepared by adding N-(2-aminoethyl)-3-aminopropyltrimethoxysilane into ethanol and stirring to mix uniformly) is thinly coated on the surface to be treated of the glass cover plate after the above cleaning treatment (the coating thickness is not greater than 1 μm), baked at 60° C. for 15 min, rinsed with acetone, and dried to obtain a glass cover plate with an aminosilane coupling agent bonded to the surface;

[0035] 5 mL of tetraethoxysilane, 1 mL of concentrated hydrochloric acid and 0.05 mL of dibutyltin dilaurate were added to a mixed solvent consisting of 10 mL of water and 60 mL of ethanol, and the mixture was stirred and mixed to obtain a siloxane composition;

[0036] The siloxane composition is coated on the surface to be treated of the glass cover plate with the aminosilane coupling agent bonded to the surface (coating thickness is about 3 μm), and baked at 120° C. for 120 min to obtain the anti-glare glass cover plate for the vehicle display screen.

[0037] Example 3

[0038] An anti-glare glass cover for a vehicle-mounted display screen, the preparation method of which comprises:

[0039] After scrubbing the surface of the glass cover plate to be treated with an aqueous solution of sodium hydroxide having a content of 5 wt%, firstly ultrasonically cleaning it with pure water for 15 minutes, then ultrasonically cleaning it with ethanol for 2 minutes, and finally rinsing it with pure water and drying it with nitrogen to obtain a cleaned glass cover plate;

[0040] A 4 wt % ethanol solution of diethylenetriaminopropyltrimethoxysilane (diethylenetriaminopropyltrimethoxysilane is added to ethanol and stirred to mix uniformly) is thinly coated on the surface to be treated of the cleaned glass cover plate (the coating thickness is not more than 1 μm), baked at 90° C. for 8 min, rinsed with acetone, and dried to obtain a glass cover plate with an aminosilane coupling agent bonded to the surface;

[0041] 15 mL of tetramethoxysilane, 1 mL of concentrated hydrochloric acid and 0.05 mL of dibutyltin dilaurate were added to a mixed solvent consisting of 5 mL of water and 50 mL of ethanol, and the mixture was stirred and mixed to obtain a siloxane composition;

[0042] The siloxane composition is coated on the surface to be treated of the glass cover plate with the aminosilane coupling agent bonded to the surface (coating thickness is about 3 μm), and baked at 160° C. for 60 min to obtain the anti-glare glass cover plate for the vehicle display screen.

[0043] Comparative Example 1

[0044] An anti-glare glass cover plate, the preparation method of which comprises:

[0045] After scrubbing the surface of the glass cover plate to be treated with an aqueous solution of sodium hydroxide having a content of 5 wt%, firstly ultrasonically cleaning it with pure water for 15 minutes, then ultrasonically cleaning it with ethanol for 2 minutes, and finally rinsing it with pure water and drying it with nitrogen to obtain a cleaned glass cover plate;

[0046] A 4 wt % propyltriethoxysilane ethanol solution (produced by adding propyltriethoxysilane into ethanol and stirring and mixing uniformly) is thinly coated on the surface to be treated of the cleaned glass cover plate (the coating thickness is not greater than 1 μm), baked at 90° C. for 8 min, rinsed with acetone, and dried to obtain a glass cover plate with an aminosilane coupling agent bonded to the surface;

[0047] 10 mL of tetraethoxysilane, 1 mL of concentrated hydrochloric acid and 0.05 mL of dibutyltin dilaurate were added to a mixed solvent consisting of 5 mL of water and 50 mL of ethanol, and the mixture was stirred and mixed to obtain a siloxane composition;

[0048] The siloxane composition is coated on the surface to be treated of the glass cover plate with the aminosilane coupling agent bonded to the surface (coating thickness is about 3 μm), and baked at 140° C. for 90 minutes to obtain the anti-glare glass cover plate.

[0049] Comparative Example 2

[0050] An anti-glare glass cover plate, the preparation method of which comprises:

[0051] After scrubbing the surface of the glass cover plate to be treated with an aqueous solution of sodium hydroxide having a content of 5 wt%, firstly ultrasonically cleaning it with pure water for 15 minutes, then ultrasonically cleaning it with ethanol for 2 minutes, and finally rinsing it with pure water and drying it with nitrogen to obtain a cleaned glass cover plate;

[0052] 10 mL of tetraethoxysilane, 3 mL of 3-aminopropyltriethoxysilane, 1 mL of concentrated hydrochloric acid and 0.05 mL of dibutyltin dilaurate were added to a mixed solvent consisting of 5 mL of water and 50 mL of ethanol, and the mixture was stirred and mixed to obtain a siloxane composition;

[0053] The siloxane composition is coated on the surface to be treated of the cleaned glass cover plate (coating thickness is about 3 μm), and baked at 140° C. for 90 minutes to obtain the anti-glare glass cover plate.

[0054] The optical properties of the glass cover plates obtained in the above embodiments and comparative examples were tested with reference to GB / T 36260-2018 standard, including the gloss value at an angle of 60°, the transmittance of visible light (400-700nm) and the haze. The specific results are as follows:

[0055] Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Gloss value (GU) 84 88 81 103 77 Transmittance (%) 95.9 96.1 95.3 91.3 89.4 Haze(%) 4.7 4.2 5.1 1.1 0.7

[0056] As can be seen from the table above, the anti-glare glass cover plates of Examples 1-3 have a moderate range of gloss, light transmittance and haze, and can achieve excellent image clarity. In contrast, the glass cover plates in the comparative examples have a relatively high gloss, but a low haze, and cannot achieve anti-glare properties.

[0057] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A method for preparing an anti-glare glass cover for a vehicle display screen, characterized in that: The steps include: (1) pre-treating the surface of the glass cover plate to be treated to form a glass cover plate with an aminosilane coupling agent bonded to the surface; (2) coating the siloxane composition on the surface of the glass cover plate bonded with the aminosilane coupling agent, and curing the siloxane composition to form a film, thereby obtaining the anti-glare glass cover plate for the vehicle display screen; The siloxane composition comprises, by weight percentage, 5-25 wt % of tetraalkoxysilane, 0.1-1 wt % of an acid catalyst, 0.01-0.1 wt % of a metal catalyst and the remainder of a solvent.

2. The method for preparing the anti-glare glass cover for vehicle-mounted display screen according to claim 1, characterized in that: The pretreatment of the surface to be treated of the glass cover plate specifically includes: coating an aminosilane coupling agent solution on the surface to be treated of the glass cover plate, and after heat treatment, forming a glass cover plate with an aminosilane coupling agent bonded to the surface.

3. The method for preparing the anti-glare glass cover for vehicle display screen according to claim 2, characterized in that: The aminosilane coupling agent solution is obtained by adding the aminosilane coupling agent into an organic solvent for dissolution and mixing.

4. The method for preparing the anti-glare glass cover for vehicle display screen according to claim 3, characterized in that: The aminosilane coupling agent is at least one of 3-aminopropyltriethoxysilane, N-(2-aminoethyl)-3-aminopropyltrimethoxysilane or diethylenetriaminopropyltrimethoxysilane.

5. The method for preparing the anti-glare glass cover for vehicle-mounted display screen according to claim 3, characterized in that: The organic solvent is at least one of methanol, ethanol, n-propanol, isopropanol or n-butanol.

6. The method for preparing the anti-glare glass cover for vehicle-mounted display screen according to claim 2, characterized in that: The heat treatment temperature is 60-120° C. and the time is 5-15 minutes.

7. The method for preparing the anti-glare glass cover for vehicle display screen according to claim 1, characterized in that: The tetraalkoxysilane is tetramethoxysilane or tetraethoxysilane; the acid catalyst is hydrochloric acid or acetic acid; the metal catalyst is dibutyltin dilaurate or aluminum acetylacetonate; and the solvent is water and at least one of methanol, ethanol, n-propanol, isopropanol or n-butanol.

8. The method for preparing the anti-glare glass cover for vehicle display screen according to any one of claims 1 to 7, characterized in that: The film-forming curing temperature is 120-160° C. and the curing time is 60-120 min. 9 . The method for preparing the anti-glare glass cover for a vehicle display screen according to claim 1 , wherein the thickness of the cured film is no more than 10 μm.

10. An anti-glare glass cover for a vehicle display screen, characterized in that: The compound is prepared by the preparation method according to any one of claims 1 to 9.