Coating liquid and preparation method and chemical strengthening method thereof

Abstract

The invention relates to the technical field of glass processing, and provides a coating liquid, which comprises 40-65% of silicic acid and / or soluble silicate, 5-10% of soluble alkali, 0.5-1% of a water reducing agent, 3-5% of a binder, 2-9% of a corrosion inhibitor, 0.1-0.5% of a wetting agent, and 30-70% of water. According to the coating liquid provided by the invention, the contained silicic acid and / or soluble silicate are / is used for forming a film layer, the soluble alkali can enable the coating liquid to be alkaline, the binding agent can enhance the binding force between the film layer and glass, the corrosion inhibitor can reduce the corrosion of the soluble alkali to the glass, and the wetting agent can reduce the wetting angle between the coating liquid and a glass substrate; the water reducing agent can reduce the use of solvents, and the chemical strengthening rate of the glass is slowed down through the combined action of the contents of all the components, so that the chemical strengthening warping of the float electronic glass substrate is improved. In addition, the coating liquid takes water as a solvent, does not need to add an organic solvent, is low in cost, and is green and environment-friendly.

Description

technical field

[0001] The application belongs to the technical field of glass processing, and in particular relates to a coating solution, a preparation method thereof, and a chemical strengthening method. Background technique

[0002] In recent years, electronic information products have basically been displays with touch panels, such as tablet computers, smart phones, car screens, and the like. On the outermost layer of the display there is a layer of protective glass, also known as cover glass. At present, the method of increasing the mechanical properties of cover glass is mainly low temperature ion exchange chemical strengthening method. Large ions (such as Cs + , K + , Na + ) replaces ions with small ionic radius in the glass (such as K + , Na + , Li + ), thereby forming surface compressive stress and ion exchange layer on the glass surface, thereby improving the mechanical strength of the product.

[0003] When the float glass is formed, because one surface o...

Examples

preparation example Construction

[0046] A second aspect of the embodiments of the present application provides a method for preparing a coating solution, such as figure 1 shown, including the following steps:

[0047] S11: Provide silicic acid or soluble silicate, soluble alkali, water reducing agent, binder, corrosion inhibitor, wetting agent, water;

[0048] S12: Mix silicic acid or soluble silicate, soluble alkali, water reducing agent, binder, corrosion inhibitor, wetting agent and water for ball milling treatment, and then filter to obtain a coating solution.

[0049] The preparation method of the coating solution provided in the embodiment of the present application comprises mixing silicic acid and / or a soluble silicate, a soluble alkali, a water reducing agent, a binder, a corrosion inhibitor, a wetting agent, and water, performing ball milling, and filtering, The coating solution can be obtained. The preparation process is simple, easy to operate and low in production cost.

[0050] In step S11 , ...

Embodiment 1A

[0069] This embodiment provides a coating solution and a preparation method thereof.

[0070] A coating solution (100% by total weight), comprising the following components by weight:

[0071]

[0072] A preparation method of a coating solution, comprising the following steps:

[0073] S11: provide each raw material component according to the coating solution of this embodiment;

[0074] S21: mixing the raw material components for 20min ball milling, then passing through a 300-mesh sieve, standing for 30min, and then passing through a 300-mesh sieve to obtain a coating solution.

Embodiment 1B

[0076] The present embodiment provides a chemical strengthening method, comprising the following steps:

[0077] S21: Provide the coating solution provided in Example 1A and a float high alumina silicate glass substrate with a thickness of 0.7 mm and a size of 10 inches;

[0078] S22: coating the coating liquid on the air surface of the glass substrate, and then heating and curing after drying to form a glass substrate with a surface-bonded film layer, and the thickness of the film layer is 3 μm;

[0079] S23: chemically strengthen the glass substrate by chemical strengthening process;

[0080] Preheating treatment: According to the heating rate of 6.3°C / min, the glass substrate with the surface bonded film layer is heated from room temperature (25±5°C) to 380°C, and then kept for 15min;

[0081] Ion exchange treatment: put the glass substrate in potassium nitrate at a temperature of 410°C for 5 hours, then lift the glass substrate to drop salt for 5 minutes; then cool the gl...

technical field

[0001] The application belongs to the technical field of glass processing, and in particular relates to a coating solution, a preparation method thereof, and a chemical strengthening method. Background technique

[0002] In recent years, electronic information products have basically been displays with touch panels, such as tablet computers, smart phones, car screens, and the like. On the outermost layer of the display there is a layer of protective glass, also known as cover glass. At present, the method of increasing the mechanical properties of cover glass is mainly low temperature ion exchange chemical strengthening method. Large ions (such as Cs + , K + , Na + ) replaces ions with small ionic radius in the glass (such as K + , Na + , Li + ), thereby forming surface compressive stress and ion exchange layer on the glass surface, thereby improving the mechanical strength of the product.

[0003] When the float glass is formed, because one surface o...

Examples

preparation example Construction

[0046] A second aspect of the embodiments of the present application provides a method for preparing a coating solution, such as figure 1 shown, including the following steps:

[0047] S11: Provide silicic acid or soluble silicate, soluble alkali, water reducing agent, binder, corrosion inhibitor, wetting agent, water;

[0048] S12: Mix silicic acid or soluble silicate, soluble alkali, water reducing agent, binder, corrosion inhibitor, wetting agent and water for ball milling treatment, and then filter to obtain a coating solution.

[0049] The preparation method of the coating solution provided in the embodiment of the present application comprises mixing silicic acid and / or a soluble silicate, a soluble alkali, a water reducing agent, a binder, a corrosion inhibitor, a wetting agent, and water, performing ball milling, and filtering, The coating solution can be obtained. The preparation process is simple, easy to operate and low in production cost.

[0050] In step S11 , ...

Embodiment 1A

[0069] This embodiment provides a coating solution and a preparation method thereof.

[0070] A coating solution (100% by total weight), comprising the following components by weight:

[0071]

[0072] A preparation method of a coating solution, comprising the following steps:

[0073] S11: provide each raw material component according to the coating solution of this embodiment;

[0074] S21: mixing the raw material components for 20min ball milling, then passing through a 300-mesh sieve, standing for 30min, and then passing through a 300-mesh sieve to obtain a coating solution.

Embodiment 1B

[0076] The present embodiment provides a chemical strengthening method, comprising the following steps:

[0077] S21: Provide the coating solution provided in Example 1A and a float high alumina silicate glass substrate with a thickness of 0.7 mm and a size of 10 inches;

[0078] S22: coating the coating liquid on the air surface of the glass substrate, and then heating and curing after drying to form a glass substrate with a surface-bonded film layer, and the thickness of the film layer is 3 μm;

[0079] S23: chemically strengthen the glass substrate by chemical strengthening process;

[0080] Preheating treatment: According to the heating rate of 6.3°C / min, the glass substrate with the surface bonded film layer is heated from room temperature (25±5°C) to 380°C, and then kept for 15min;

[0081] Ion exchange treatment: put the glass substrate in potassium nitrate at a temperature of 410°C for 5 hours, then lift the glass substrate to drop salt for 5 minutes; then cool the gl...

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