Coated energy-saving glass, coating solution and coating process

Abstract

The present invention discloses a coated energy-saving glass, a coating liquid, and a coating process, belonging to the technical field of coated glass. The glass substrate comprises a glass substrate and a coating layer coated thereon; the coating layer is formed by solidifying the coating liquid. The coating liquid comprises the following raw material components in parts by weight: 10 to 15 parts of dibutyl phosphate, 1 to 5 parts of a stabilizer, 1 to 5 parts of an emulsifier, 20 to 35 parts of an epoxy acrylic resin, 0.5 to 3 parts of a cosolvent, and 10 to 15 parts of diethylene glycol amine. By combining the various components, the present invention can not only effectively enhance the adhesion of the coating liquid to the glass substrate, but also significantly improve the light transmittance, flexibility, and mechanical properties of the coating liquid, thereby greatly extending its service life.

Description

Technical Field

[0001] The present invention belongs to the technical field of coated glass, and in particular relates to coated energy-saving glass, a coating liquid and a coating process. Background Art

[0002] Coated glass, due to its excellent thermal insulation, sound insulation, light transmittance, and aesthetics, is widely used in architecture, automobiles, electronic display screens, and other fields. With growing awareness of environmental protection and energy conservation, high-performance coated glass products such as low-emissivity (Low-E) coated glass and smart dimming glass are gaining market favor. These products effectively block ultraviolet and infrared rays, reducing indoor heating and cooling energy consumption while providing privacy and visual comfort.

[0003] Coated glass can be divided into the following categories based on its different characteristics: heat-reflective glass, low-emissivity glass (Low-E), and conductive film glass. Heat-reflective glass is generally coated with one or more layers of thin films composed of metals such as chromium, titanium, or stainless steel, or their compounds, on the glass surface. This gives the product a rich color, has appropriate transmittance for visible light, high reflectivity for infrared rays, and high absorptivity for ultraviolet rays. It is mainly used in buildings and glass curtain walls. Low-emissivity glass is coated with multiple layers of thin films composed of metals such as silver, copper, or tin, or their compounds, on the glass surface. The product has high transmittance for visible light, high reflectivity for infrared rays, and good thermal insulation properties. It is mainly used in buildings and transportation vehicles such as automobiles and ships. Conductive film glass is coated with a conductive film such as indium tin oxide on the glass surface. It can be used for heating, defrosting, and defogging the glass, and as a liquid crystal display screen.

[0004] Heat-reflective glass and low-emissivity glass are widely used, but they suffer from drawbacks such as poor impact resistance, susceptibility to contamination and scratching during handling and installation, poor light transmittance, susceptibility to aging, low thermal and acoustic insulation, and the coating's tendency to peel, shortening its service life. Therefore, improving the light transmittance and weather resistance of coated glass is a pressing challenge for the industry. Summary of the Invention

[0005] In view of the above-mentioned deficiencies in the prior art, the present invention provides a coated energy-saving glass, a coating liquid and a coating process, which can effectively improve its adhesion and light transmittance and have good weather resistance.

[0006] To achieve the above-mentioned purpose, the technical solution adopted by the present invention to solve the technical problem is:

[0007] The object of the present invention is to provide a coated energy-saving glass, which comprises a glass substrate and a coating layer coated thereon; the coating layer is formed by solidifying a coating liquid; and the coating liquid is prepared by the following method:

[0008] S1, epoxy acrylic resin and diethylene glycol amine are cross-linked through a ring-opening reaction;

[0009] S2. Evenly mix dibutyl phosphate, a stabilizer, an emulsifier and the product obtained in S1 to prepare the coating solution.

[0010] Furthermore, the glass substrate is a single piece of float glass.

[0011] Another object of the present invention is to provide a coating solution comprising the following raw material components in parts by weight:

[0012] 10-15 parts of dibutyl phosphate, 1-5 parts of stabilizer, 1-5 parts of emulsifier, 20-35 parts of epoxy acrylic resin, 0.5-3 parts of cosolvent, and 10-15 parts of diethylene glycol amine.

[0013] Furthermore, the raw material components include the following parts by weight:

[0014] 10-13 parts of dibutyl phosphate, 3-5 parts of stabilizer, 3-5 parts of emulsifier, 20-25 parts of epoxy acrylic resin, 0.5-1.5 parts of cosolvent, and 10-12 parts of diethylene glycol amine.

[0015] Furthermore, the stabilizer is sodium phosphate or hydroxypropyl cellulose.

[0016] Furthermore, the emulsifier is sodium lauryl sulfate or ammonium lauryl ether sulfate.

[0017] Furthermore, the cosolvent is ethanol, ethylene glycol or n-butanol.

[0018] Another object of the present invention is to provide a method for preparing the above-mentioned coating solution, comprising the following steps:

[0019] (1) Add epoxy acrylic resin, cosolvent and diethylene glycol amine into the solvent according to the formula, stir and dissolve, and react at 60-100°C for 5-10 hours under the action of a catalyst;

[0020] (2) After the reaction is completed, dibutyl phosphate, a stabilizer and an emulsifier are added to the product obtained in step (1), and the mixture is stirred and mixed to obtain the coating solution.

[0021] Furthermore, the catalyst is a tertiary amine catalyst.

[0022] Furthermore, the catalyst is 2,4,6-tris(dimethylaminomethyl)phenol.

[0023] Furthermore, the solvent is acetone.

[0024] Another object of the present invention is to provide a coating process for energy-saving glass, which adopts a spraying or roller coating method to apply the above-mentioned coating liquid, or the coating liquid prepared by the above-mentioned method, to the surface of the glass substrate, and then solidifies and tempers it in sequence to form a coating layer with a thickness of 0.5 to 1.5 mm.

[0025] Beneficial effects of the present invention:

[0026] Epoxy acrylic resin has excellent light transmittance. The present invention uses a ring-opening reaction between epoxy acrylic resin and diethylene glycolamine to generate hydroxyl and amine groups, which can further cross-link with other epoxy groups in the epoxy resin to form a three-dimensional network structure, thereby effectively improving the material's weather resistance, mechanical properties, light transmittance, and other properties, imparting excellent transparency. Furthermore, the introduction of diethylene glycolamine can lower the glass transition temperature of the epoxy acrylic resin, thereby improving the material's flexibility.

[0027] 2. The present invention further introduces dibutyl phosphate into the formula. Dibutyl phosphate can effectively reduce the problem of rapid aging rate of epoxy acrylic resin under light, further improve the weather resistance of the material, and greatly extend the service life of the material.

[0028] 3. The present invention, through the combination of various components, can not only effectively improve the adhesion between the coating solution and the glass substrate, but also significantly improve the transmittance, flexibility and mechanical properties of the coating solution, greatly extending its service life. DETAILED DESCRIPTION

[0029] The specific embodiments of the present invention are described below to facilitate understanding of the present invention by those skilled in the art. However, it should be clear that the present invention is not limited to the scope of the specific embodiments. For those skilled in the art, as long as various changes are within the spirit and scope of the present invention as defined and determined by the appended claims, these changes are obvious, and all inventions and creations utilizing the concepts of the present invention are protected.

[0030] Example 1:

[0031] A coated energy-saving glass comprises a glass substrate and a coating layer with a thickness of 1.2 mm coated thereon; the coating layer is formed by curing and tempering a coating liquid; the specific raw material components of the coating liquid are as follows:

[0032] 10 parts of dibutyl phosphate, 3 parts of hydroxypropyl cellulose, 3 parts of sodium lauryl sulfate, 25 parts of epoxy acrylic resin, 1.5 parts of ethanol, and 10 parts of diethylene glycolamine.

[0033] The preparation method of the above-mentioned coating solution is as follows:

[0034] (1) Add epoxy acrylic resin, ethanol and diethylene glycol amine into the solvent according to the formula, stir and dissolve, and then react at 82°C for 6 hours under the action of 2,4,6-tris(dimethylaminomethyl)phenol;

[0035] (2) After the reaction is completed, dibutyl phosphate, hydroxypropyl cellulose and sodium lauryl sulfate are added to the product obtained in step (1), and the mixture is stirred and mixed to obtain the coating solution.

[0036] Example 2:

[0037] A coated energy-saving glass comprises a glass substrate and a coating layer with a thickness of 1.2 mm coated thereon; the coating layer is formed by curing and tempering a coating liquid; the specific raw material components of the coating liquid are as follows:

[0038] 15 parts of dibutyl phosphate, 5 parts of hydroxypropyl cellulose, 1 part of sodium lauryl sulfate, 35 parts of epoxy acrylic resin, 3 parts of ethanol, and 15 parts of diethylene glycolamine.

[0039] The preparation method of the above-mentioned coating solution is as follows:

[0040] (1) Add epoxy acrylic resin, ethanol and diethylene glycol amine into the solvent according to the formula, stir and dissolve, and then react at 60°C for 10 hours under the action of 2,4,6-tris(dimethylaminomethyl)phenol;

[0041] (2) After the reaction is completed, dibutyl phosphate, hydroxypropyl cellulose and sodium lauryl sulfate are added to the product obtained in step (1), and the mixture is stirred and mixed to obtain the coating solution.

[0042] Example 3:

[0043] A coated energy-saving glass comprises a glass substrate and a coating layer with a thickness of 1.2 mm coated thereon; the coating layer is formed by curing and tempering a coating liquid; the specific raw material components of the coating liquid are as follows:

[0044] 12 parts of dibutyl phosphate, 3 parts of hydroxypropyl cellulose, 5 parts of sodium lauryl sulfate, 30 parts of epoxy acrylic resin, 1 part of ethanol, and 13 parts of diethylene glycolamine.

[0045] The preparation method of the above-mentioned coating solution is as follows:

[0046] (1) Add epoxy acrylic resin, ethanol and diethylene glycol amine into the solvent according to the formula, stir and dissolve, and then react at 100°C for 5 hours under the action of 2,4,6-tris(dimethylaminomethyl)phenol;

[0047] (2) After the reaction is completed, dibutyl phosphate, hydroxypropyl cellulose and sodium lauryl sulfate are added to the product obtained in step (1), and the mixture is stirred and mixed to obtain the coating solution.

[0048] Comparative Example 1:

[0049] Compared with Example 1, the difference is that dibutyl phosphate is not used in the formula, and the rest of the process is consistent with Example 1.

[0050] Comparative Example 2:

[0051] Compared with Example 1, the difference is that diethylene glycolamine is not used in the formula, and the rest of the process is consistent with Example 1.

[0052] Comparative Example 3:

[0053] Compared with Example 1, the difference is that dibutyl phosphate is not used in the formula. At the same time, other phenolic hydroxyl compounds with good weather resistance and light transmittance are used to replace the epoxy acrylic resin and diethylene glycolamine, such as hexamethoxymethyl melamine or 1,3,4,6-tetrakis(methoxymethyl)glycoluril. The rest of the process remains consistent with Example 1.

[0054] Test example:

[0055] 1. Light transmittance detection

[0056] The transmittance of float glass before and after coating within the visible light wavelength range was measured according to ISO 9050-2003, and the anti-reflection factor was calculated. The float glass thickness was 10 mm. The adhesion level of the coating solution was then tested according to the cross-cut test method disclosed in ISO 2409-2013. The results are shown in Table 1.

[0057] Table 1 Transmittance and adhesion test

[0058]

[0059] According to the test results in Table 1, it can be seen that the coating solution prepared by the present invention can not only effectively adhere to the surface of the glass substrate, but also significantly improve the light transmittance of the glass substrate.

[0060] 2. The coating solutions prepared in Examples 1 to 3 and Comparative Examples 1 to 3 were placed in an electric constant temperature blast drying oven for 10 days, maintaining the temperature at 160° C. The yellowness index test was performed every two days. The results are shown in Table 2.

[0061] Table 2 Heat aging yellow index

[0062] Yellow Index 0 days 2 days 4 days 6 days 8 days 10 days Example 1 2.4 2.6 3.1 3.3 3.6 3.7 Example 2 2.4 2.6 3.0 3.4 3.6 3.8 Example 3 2.4 2.7 3.1 3.4 3.7 3.8 Comparative Example 1 4.5 5.3 6.5 8.4 9.1 9.8 Comparative Example 2 2.6 3.1 3.6 4.0 4.5 4.9 Comparative Example 3 5.8 6.9 8.4 10.3 11.8 13.5

[0063] 3. The coating solutions prepared in Examples 1 to 3 and Comparative Examples 1 to 3 were placed in a ZN-T UV aging test chamber for 10 days. The illumination conditions were 4×40W UV340 UV lamps. The yellowness index test was performed every two days. The results are shown in Table 3.

[0064] Table 3 UV aging yellow index

[0065] Yellow Index 0 days 2 days 4 days 6 days 8 days 10 days Example 1 2.4 2.8 3.4 3.7 4.2 4.5 Example 2 2.4 2.8 3.3 3.8 4.3 4.6 Example 3 2.4 2.9 3.4 3.8 4.3 4.5 Comparative Example 1 4.5 6.2 7.9 9.8 10.7 11.4 Comparative Example 2 2.6 3.4 4.2 5.6 6.6 7.4 Comparative Example 3 5.8 8.4 11.6 15.2 17.3 18.4

[0066] It can be seen from the test results in Table 2 and Table 3 that the coating solution prepared by the present invention has excellent anti-aging effect, can significantly extend its service life, and will not significantly affect the light transmittance of the glass after long-term use.

[0067] Finally, it should be noted that the above specific implementation methods are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail with reference to examples, those skilled in the art should understand that the technical solutions of the present invention can be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A coated energy-saving glass, characterized in that: The invention comprises a glass substrate and a coating layer coated thereon; the coating layer is formed by solidifying a coating solution; the coating solution comprises the following raw material components in parts by weight: 10-15 parts of dibutyl phosphate, 1-5 parts of stabilizer, 1-5 parts of emulsifier, 20-35 parts of epoxy acrylic resin, 0.5-3 parts of cosolvent, and 10-15 parts of diethylene glycolamine; The preparation method of the coating solution is as follows: S1, epoxy acrylic resin and diethylene glycol amine are cross-linked through a ring-opening reaction; S2. Evenly mix dibutyl phosphate, a stabilizer, an emulsifier and the product obtained in S1 to prepare the coating solution.

2. A coating solution, characterized in that: The raw material components include the following parts by weight: 10-15 parts of dibutyl phosphate, 1-5 parts of stabilizer, 1-5 parts of emulsifier, 20-35 parts of epoxy acrylic resin, 0.5-3 parts of cosolvent, and 10-15 parts of diethylene glycolamine; The preparation method comprises the following steps: (1) Add epoxy acrylic resin, cosolvent and diethylene glycol amine into the solvent according to the formula, stir and dissolve, and react at 60-100°C for 5-10 hours under the action of a catalyst; (2) After the reaction is completed, dibutyl phosphate, a stabilizer and an emulsifier are added to the product obtained in step (1), and the mixture is stirred and mixed to obtain the coating solution.

3. The coating solution according to claim 2, wherein: The raw material components include the following parts by weight: 10-13 parts of dibutyl phosphate, 3-5 parts of stabilizer, 3-5 parts of emulsifier, 20-25 parts of epoxy acrylic resin, 0.5-1.5 parts of cosolvent, and 10-12 parts of diethylene glycol amine.

4. The plating solution according to claim 2 or 3, characterized in that: Stabilizers are sodium phosphate or hydroxypropyl cellulose.

5. The plating solution according to claim 2 or 3, characterized in that: The emulsifier is sodium lauryl sulfate or ammonium lauryl ether sulfate.

6. The coating solution according to claim 2 or 3, characterized in that: The cosolvent is ethanol, ethylene glycol or n-butanol.

7. A method for preparing a plating solution according to any one of claims 2 to 6, characterized in that: The following steps are involved: (1) Add epoxy acrylic resin, cosolvent and diethylene glycol amine into the solvent according to the formula, stir and dissolve, and react at 60-100°C for 5-10 hours under the action of a catalyst; (2) After the reaction is completed, dibutyl phosphate, a stabilizer and an emulsifier are added to the product obtained in step (1), and the mixture is stirred and mixed to obtain the coating solution.

8. The preparation method according to claim 7, characterized in that The catalyst is a tertiary amine catalyst.

9. The preparation method according to claim 7, characterized in that The solvent is acetone.

10. A coating process for energy-saving glass, characterized in that: The coating solution according to any one of claims 2 to 6, or the coating solution prepared according to claim 7 or 8, is applied to the surface of the glass substrate by spraying or roller coating, and then cured and tempered in sequence to form a coating layer with a thickness of 0.5 to 1.5 mm.

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