Heat insulation glass and preparation method thereof

Abstract

The invention belongs to the technical field of glass, and particularly discloses heat-insulating glass and a preparation method thereof.The preparation method of the heat-insulating glass comprises the following steps that a glass matrix is coated with heat-insulating slurry, curing is conducted, and the heat-insulating glass is obtained; according to the heat-insulating glass and the preparation method thereof, the heat-insulating glass is used as a matrix, the modified silicon dioxide and the wollastonite whiskers are added, and the modified silicon dioxide and the wollastonite whiskers are good in compatibility in a system, can be uniformly dispersed in the system, do not agglomerate, form a compact filling network and form a'thermal barrier 'in the system, so that the heat-insulating glass has a good heat-insulating effect; heat conduction is effectively blocked, and most of heat is absorbed and reflected, so that heat transfer is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of glass, and in particular to a heat-insulating glass and a preparation method thereof. Background Art

[0002] With the increasing demand for building energy conservation and environmental protection, glass, as an important material for buildings and vehicles, is widely used in windows, curtain walls and other parts due to its light transmittance and transparency. However, the high thermal conductivity of glass can easily lead to a drastic exchange of indoor and outdoor temperatures, which in turn causes a large amount of energy loss, especially in an environment where air conditioning is used. Therefore, the development of glass with good thermal insulation performance has become an important direction of current technological development.

[0003] Traditional insulating glass usually adopts a double-layer or multi-layer structure, filling inert gas (such as argon) between the two layers of glass or using low-emissivity coating technology (Low-E) to reduce heat conduction and radiation. However, this type of technology still has some technical bottlenecks and limitations during use, such as: ① Limited insulation effect: Although the insulation effect can be improved to a certain extent by filling inert gas or coating technology, the insulation effect cannot reach the ideal state due to the high light transmittance and thermal radiation absorption capacity of the glass surface. ② High cost: The manufacturing cost of low-emissivity coating technology and multi-layer glass is relatively high, especially the need for sophisticated equipment and processes, which limits its large-scale application in ordinary buildings.

[0004] In view of this, this application is filed. Summary of the invention

[0005] The invention provides a heat-insulating glass and a preparation method thereof. The heat-insulating glass has an excellent heat-insulating effect.

[0006] The present invention solves the technical problem by adopting the following technical solutions: A method for preparing heat-insulating glass comprises the following steps: The heat-insulating slurry is coated on the glass substrate and solidified to obtain the heat-insulating glass; The thermal insulation slurry includes component A and component B, wherein component A includes the following components in parts by weight: 45 to 52 parts of water-based hydroxy acrylic resin, 16 to 22 parts of modified silica, 12 to 16 parts of dimethyl silicone oil, 8 to 14 parts of wollastonite whiskers, 1 to 3 parts of titanate coupling agent, 0.1 to 0.5 parts of sodium dodecyl sulfate, 1 to 2.5 parts of tetraethyl orthosilicate, 1 to 3 parts of propylene glycol, and 0.4 to 0.8 parts of leveling agent.

[0007] The present invention takes insulating glass and its preparation method as a matrix, and adds modified silica and wollastonite whiskers therein. The modified silica and wollastonite whiskers have good compatibility in the system, can be evenly dispersed in the system, will not agglomerate, form a dense filling network, and form a "thermal barrier" in the system, effectively blocking the conduction of heat, absorbing and reflecting most of the heat, thereby reducing the transfer of heat.

[0008] As a preferred embodiment of the present invention, the B component includes the following components in parts by weight: 15 to 20 parts of an aqueous isocyanate curing agent and 0.5 to 2 parts of a wetting and dispersing agent.

[0009] As a preferred embodiment of the present invention, the preparation method of the modified silicon dioxide is: (1) Add silicon dioxide and tartaric acid to a hydrochloric acid solution, stir evenly, add sodium hydroxide to adjust the pH to 9.8-10.2, and dry to obtain a precursor; (2) adding the precursor, stearyl alcohol and γ-aminopropyltriethoxysilane into water and stirring evenly to obtain a mixed solution; (3) Add vinylidene fluoride, acrylic acid and potassium persulfate to dimethyl sulfoxide, and react at 75-85°C for 2-4 hours under nitrogen protection to obtain a modified solution; (4) Add azobisisobutyronitrile and the modified liquid to the mixed liquid, react at 75-85°C for 2-4 hours under nitrogen protection, wash, and dry to obtain modified silica.

[0010] The present invention creatively performs a silica and tartaric acid activation treatment on silica to improve the activity and surface hydroxyl content of silica, and then treats it with stearyl alcohol and γ-aminopropyltriethoxysilane to further improve its activity, preliminarily improve the dispersion effect and compatibility of silica in the system, and improve the reinforcement and heat insulation effects of silica, and then modify the silica with the reactants of vinylidene fluoride and acrylic acid, effectively improving the compatibility and dispersibility of silica in water-based hydroxy acrylic resin, so that it can still be evenly dispersed in the case of a high addition amount without agglomeration, and at the same time promotes the formation of a "thermal barrier" in the system, effectively reduces the interface thermal conductivity between silica particles, further reduces the overall thermal conductivity of the material, and improves its stability, slows down the heat conduction speed, effectively blocks the conduction of heat, absorbs and reflects most of the heat, and thus reduces the transfer of heat.

[0011] As a preferred embodiment of the present invention, the mass ratio of the silicon dioxide, tartaric acid and hydrochloric acid solution is 1: (0.05-0.08): (2-4); The molar concentration of the hydrochloric acid solution is 0.5-2 mol / L.

[0012] As a preferred embodiment of the present invention, the mass ratio of the precursor, stearyl alcohol, γ-aminopropyltriethoxysilane and water is 1: (0.02-0.06): (0.01-0.05): (2-5).

[0013] As a preferred embodiment of the present invention, the mass ratio of vinylidene fluoride, acrylic acid, potassium persulfate and dimethyl sulfoxide is 1: (1-1.2): (0.02-0.05): (4-10).

[0014] As a preferred embodiment of the present invention, the mass ratio of azobisisobutyronitrile, modifying liquid and mixed liquid is (0.02~0.05):(0.2~0.5):1.

[0015] As a preferred embodiment of the present invention, the density of the wollastonite whiskers is 2.9-3 g / cm 2 , particle size is 80~400 mesh.

[0016] As a preferred embodiment of the present invention, the curing temperature is 120-150° C., and the curing time is 90-150 min.

[0017] The present invention does not limit the preparation method of the thermal insulation slurry. The thermal insulation slurry can be prepared into thermal insulation slurry according to conventional technical means based on the formula of the thermal insulation slurry disclosed in the present invention.

[0018] Exemplarily, the preparation method of the thermal insulation slurry is: The raw materials in component A are mixed evenly to obtain component A, and component B and component A are mixed evenly to obtain thermal insulation slurry.

[0019] The present invention also provides a heat-insulating glass, which is prepared by the above-mentioned preparation method.

[0020] Beneficial effects of the present invention: The present invention takes insulating glass and its preparation method as a matrix, and adds modified silica and wollastonite whiskers therein. The modified silica and wollastonite whiskers have good compatibility in the system, can be evenly dispersed in the system, will not agglomerate, form a dense filling network, and form a "thermal barrier" in the system, effectively blocking the conduction of heat, absorbing and reflecting most of the heat, thereby reducing the transfer of heat. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be described clearly and completely below. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] In the present invention, the technical features described in an open manner include closed technical solutions composed of the listed features, and also include open technical solutions containing the listed features.

[0023] In the present invention, when it comes to numerical ranges, unless otherwise specified, the above numerical ranges are deemed to be continuous and include the minimum and maximum values ​​of the range, as well as each value between such minimum and maximum values. Further, when a range refers to an integer, each integer between the minimum and maximum values ​​of the range is included. In addition, when multiple ranges are provided to describe features or characteristics, the ranges can be merged. In other words, unless otherwise specified, all ranges disclosed herein should be understood to include any and all subranges included therein.

[0024] In the present invention, there is no particular limitation on the specific dispersion and stirring treatment methods.

[0025] The reagents or instruments used in the present invention without indicating the manufacturer are all conventional products that can be obtained commercially. The raw materials used in the comparative examples and the raw materials used in the parallel experiments of the embodiments are the same commercially available products unless otherwise specified.

[0026] Example 1 A method for preparing heat-insulating glass comprises the following steps: Apply the thermal insulation slurry to a 10 mm thick glass substrate (1 mm 1m), the coating thickness is 1500nm, and it is cured at 140℃ for 120min to obtain insulating glass; The thermal insulation slurry comprises an A component and a B component.

[0027] The B component includes the following components in parts by weight: 18.5 parts of a water-based isocyanate curing agent (Covestro, Bayhydur 3100) and 1.5 parts of a wetting and dispersing agent BYK-19.

[0028] The component A includes the following components in parts by weight: 48.3 parts of water-based hydroxy acrylic resin, 20 parts of modified silica, 15 parts of dimethyl silicone oil, 10 parts of wollastonite whiskers, 2 parts of titanate coupling agent NDZ-201, 0.2 parts of sodium dodecyl sulfate, 2 parts of ethyl orthosilicate, 2 parts of propylene glycol, and 0.5 parts of leveling agent BYK-333.

[0029] The water-based hydroxy acrylic resin is water-based hydroxy acrylic resin CX-826 (provided by Deyude Trading Company).

[0030] Wherein, the density of the wollastonite whisker is 2.95g / cm 2 , particle size is 200 mesh.

[0031] The preparation method of the modified silicon dioxide is: (1) Add 2000 mesh silica and tartaric acid to a 1 mol / L hydrochloric acid solution, stir evenly at 500 rpm, add sodium hydroxide to adjust the pH to 10, and dry to obtain a precursor; the mass ratio of the silica, tartaric acid, and hydrochloric acid solution is 1:0.06:3; (2) adding the precursor, stearyl alcohol, and γ-aminopropyl triethoxysilane to water, and stirring at a speed of 500 rpm to obtain a mixed solution; the mass ratio of the precursor, stearyl alcohol, γ-aminopropyl triethoxysilane, and water is 1:0.05:0.04:4; (3) Adding vinylidene fluoride, acrylic acid, and potassium persulfate to dimethyl sulfoxide, reacting at 80° C. for 3 hours under nitrogen protection to obtain a modified liquid; the mass ratio of the vinylidene fluoride, acrylic acid, potassium persulfate, and dimethyl sulfoxide is 1:1.1:0.04:8.

[0032] (4) Adding azobisisobutyronitrile and modifying liquid to the mixed liquid, reacting at 80°C for 3 hours under nitrogen protection, washing, and drying to obtain modified silicon dioxide. The mass ratio of azobisisobutyronitrile, modifying liquid, and mixed liquid is 0.04:0.4:1.

[0033] Example 2 A method for preparing heat-insulating glass comprises the following steps: Apply the thermal insulation slurry to a 10 mm thick glass substrate (1 mm 1m), the coating thickness is 1500nm, and it is cured at 140℃ for 120min to obtain insulating glass; The thermal insulation slurry comprises an A component and a B component.

[0034] The B component includes the following components in parts by weight: 18.5 parts of a water-based isocyanate curing agent (Covestro, Bayhydur 3100) and 1.5 parts of a wetting and dispersing agent BYK-19.

[0035] The component A includes the following components in parts by weight: 48.3 parts of water-based hydroxy acrylic resin, 16 parts of modified silica, 15 parts of dimethyl silicone oil, 14 parts of wollastonite whiskers, 2 parts of titanate coupling agent NDZ-201, 0.2 parts of sodium dodecyl sulfate, 2 parts of ethyl orthosilicate, 2 parts of propylene glycol, and 0.5 parts of leveling agent BYK-333.

[0036] The water-based hydroxy acrylic resin is water-based hydroxy acrylic resin CX-826 (provided by Deyude Trading Company).

[0037] Wherein, the density of the wollastonite whisker is 2.95g / cm 2 , particle size is 200 mesh.

[0038] The preparation method of the modified silicon dioxide is: (1) Add 2000 mesh silica and tartaric acid to a 1 mol / L hydrochloric acid solution, stir evenly at 500 rpm, add sodium hydroxide to adjust the pH to 10, and dry to obtain a precursor; the mass ratio of the silica, tartaric acid, and hydrochloric acid solution is 1:0.06:3; (2) adding the precursor, stearyl alcohol, and γ-aminopropyl triethoxysilane to water, and stirring at a speed of 500 rpm to obtain a mixed solution; the mass ratio of the precursor, stearyl alcohol, γ-aminopropyl triethoxysilane, and water is 1:0.05:0.04:4; (3) Adding vinylidene fluoride, acrylic acid, and potassium persulfate to dimethyl sulfoxide, reacting at 80° C. for 3 hours under nitrogen protection to obtain a modified liquid; the mass ratio of the vinylidene fluoride, acrylic acid, potassium persulfate, and dimethyl sulfoxide is 1:1.1:0.04:8.

[0039] (4) Adding azobisisobutyronitrile and modifying liquid to the mixed liquid, reacting at 80°C for 3 hours under nitrogen protection, washing, and drying to obtain modified silicon dioxide. The mass ratio of azobisisobutyronitrile, modifying liquid, and mixed liquid is 0.04:0.4:1.

[0040] Example 3 A method for preparing heat-insulating glass comprises the following steps: Apply the thermal insulation slurry to a 10 mm thick glass substrate (1 mm 1m), the coating thickness is 1500nm, and it is cured at 140℃ for 120min to obtain insulating glass; The thermal insulation slurry comprises an A component and a B component.

[0041] The B component includes the following components in parts by weight: 18.5 parts of a water-based isocyanate curing agent (Covestro, Bayhydur 3100) and 1.5 parts of a wetting and dispersing agent BYK-19.

[0042] The component A includes the following components in parts by weight: 48.3 parts of water-based hydroxy acrylic resin, 22 parts of modified silica, 15 parts of dimethyl silicone oil, 8 parts of wollastonite whiskers, 2 parts of titanate coupling agent NDZ-201, 0.2 parts of sodium dodecyl sulfate, 2 parts of ethyl orthosilicate, 2 parts of propylene glycol, and 0.5 parts of leveling agent BYK-333.

[0043] The water-based hydroxy acrylic resin is water-based hydroxy acrylic resin CX-826 (provided by Deyude Trading Company).

[0044] Wherein, the density of the wollastonite whisker is 2.95g / cm2 , particle size is 200 mesh.

[0045] The preparation method of the modified silicon dioxide is: (1) Add 2000 mesh silica and tartaric acid to a 1 mol / L hydrochloric acid solution, stir evenly at 500 rpm, add sodium hydroxide to adjust the pH to 10, and dry to obtain a precursor; the mass ratio of the silica, tartaric acid, and hydrochloric acid solution is 1:0.06:3; (2) adding the precursor, stearyl alcohol, and γ-aminopropyl triethoxysilane to water, and stirring at a speed of 500 rpm to obtain a mixed solution; the mass ratio of the precursor, stearyl alcohol, γ-aminopropyl triethoxysilane, and water is 1:0.05:0.04:4; (3) Adding vinylidene fluoride, acrylic acid, and potassium persulfate to dimethyl sulfoxide, reacting at 80° C. for 3 hours under nitrogen protection to obtain a modified liquid; the mass ratio of the vinylidene fluoride, acrylic acid, potassium persulfate, and dimethyl sulfoxide is 1:1.1:0.04:8.

[0046] (4) Adding azobisisobutyronitrile and modifying liquid to the mixed liquid, reacting at 80°C for 3 hours under nitrogen protection, washing, and drying to obtain modified silicon dioxide. The mass ratio of azobisisobutyronitrile, modifying liquid, and mixed liquid is 0.04:0.4:1.

[0047] Example 4 A method for preparing heat-insulating glass comprises the following steps: Apply the thermal insulation slurry to a 10 mm thick glass substrate (1 mm 1m), the coating thickness is 1500nm, and it is cured at 140℃ for 120min to obtain insulating glass; The thermal insulation slurry comprises an A component and a B component.

[0048] The B component includes the following components in parts by weight: 18.5 parts of a water-based isocyanate curing agent (Covestro, Bayhydur 3100) and 1.5 parts of a wetting and dispersing agent BYK-19.

[0049] The component A includes the following components in parts by weight: 48.3 parts of water-based hydroxy acrylic resin, 20 parts of modified silica, 15 parts of dimethyl silicone oil, 10 parts of wollastonite whiskers, 2 parts of titanate coupling agent NDZ-201, 0.2 parts of sodium dodecyl sulfate, 2 parts of ethyl orthosilicate, 2 parts of propylene glycol, and 0.5 parts of leveling agent BYK-333.

[0050] The water-based hydroxy acrylic resin is water-based hydroxy acrylic resin CX-826 (provided by Deyude Trading Company).

[0051] Wherein, the density of the wollastonite whisker is 2.95g / cm 2 , particle size is 200 mesh.

[0052] The preparation method of the modified silicon dioxide is: (1) Add 2000 mesh silica and tartaric acid to a 1 mol / L hydrochloric acid solution, stir evenly at 500 rpm, add sodium hydroxide to adjust the pH to 10, and dry to obtain a precursor; the mass ratio of the silica, tartaric acid, and hydrochloric acid solution is 1:0.08:4; (2) adding the precursor, stearyl alcohol, and γ-aminopropyl triethoxysilane to water, and stirring at a speed of 500 rpm to obtain a mixed solution; the mass ratio of the precursor, stearyl alcohol, γ-aminopropyl triethoxysilane, and water is 1:0.02:0.01:2; (3) Adding vinylidene fluoride, acrylic acid, and potassium persulfate to dimethyl sulfoxide, reacting at 80° C. for 3 hours under nitrogen protection to obtain a modified liquid; the mass ratio of the vinylidene fluoride, acrylic acid, potassium persulfate, and dimethyl sulfoxide is 1:1:0.02:4.

[0053] (4) Adding azobisisobutyronitrile and modifying liquid to the mixed liquid, reacting at 80°C for 3 hours under nitrogen protection, washing, and drying to obtain modified silicon dioxide. The mass ratio of azobisisobutyronitrile, modifying liquid, and mixed liquid is 0.02:0.2:1.

[0054] Example 5 A method for preparing heat-insulating glass comprises the following steps: Apply the thermal insulation slurry to a 10 mm thick glass substrate (1 mm 1m), the coating thickness is 1500nm, and it is cured at 140℃ for 120min to obtain insulating glass; The thermal insulation slurry comprises an A component and a B component.

[0055] The B component includes the following components in parts by weight: 18.5 parts of a water-based isocyanate curing agent (Covestro, Bayhydur 3100) and 1.5 parts of a wetting and dispersing agent BYK-19.

[0056] The component A includes the following components in parts by weight: 48.3 parts of water-based hydroxy acrylic resin, 20 parts of modified silica, 15 parts of dimethyl silicone oil, 10 parts of wollastonite whiskers, 2 parts of titanate coupling agent NDZ-201, 0.2 parts of sodium dodecyl sulfate, 2 parts of ethyl orthosilicate, 2 parts of propylene glycol, and 0.5 parts of leveling agent BYK-333.

[0057] The water-based hydroxy acrylic resin is water-based hydroxy acrylic resin CX-826 (provided by Deyude Trading Company).

[0058] Wherein, the density of the wollastonite whisker is 2.95g / cm 2 , particle size is 200 mesh.

[0059] The preparation method of the modified silicon dioxide is: (1) Add 2000 mesh silica and tartaric acid to a 1 mol / L hydrochloric acid solution, stir evenly at 500 rpm, add sodium hydroxide to adjust the pH to 10, and dry to obtain a precursor; the mass ratio of the silica, tartaric acid, and hydrochloric acid solution is 1:0.05:2; (2) adding the precursor, stearyl alcohol, and γ-aminopropyl triethoxysilane to water, and stirring at a speed of 500 rpm to obtain a mixed solution; the mass ratio of the precursor, stearyl alcohol, γ-aminopropyl triethoxysilane, and water is 1:0.06:0.05:5; (3) Adding vinylidene fluoride, acrylic acid, and potassium persulfate to dimethyl sulfoxide, reacting at 80° C. for 3 hours under nitrogen protection to obtain a modified liquid; the mass ratio of the vinylidene fluoride, acrylic acid, potassium persulfate, and dimethyl sulfoxide is 1:1.2:0.05:10.

[0060] (4) Adding azobisisobutyronitrile and modifying liquid to the mixed liquid, reacting at 80°C for 3 hours under nitrogen protection, washing, and drying to obtain modified silicon dioxide. The mass ratio of azobisisobutyronitrile, modifying liquid, and mixed liquid is 0.05:0.5:1.

[0061] Comparative Example 1 The difference between Comparative Example 1 and Example 1 is that component A of Comparative Example 1 does not contain modified silicon dioxide (replaced by an equal amount of wollastonite whiskers), and the rest are the same.

[0062] The component A includes the following components in parts by weight: 48.3 parts of water-based hydroxy acrylic resin, 15 parts of dimethyl silicone oil, 30 parts of wollastonite whiskers, 2 parts of titanate coupling agent NDZ-201, 0.2 parts of sodium dodecyl sulfate, 2 parts of ethyl orthosilicate, 2 parts of propylene glycol, and 0.5 parts of leveling agent BYK-333.

[0063] Comparative Example 2 The difference between Comparative Example 2 and Example 1 is that component A of Comparative Example 2 does not contain modified silicon dioxide (replaced by an equal amount of wollastonite whiskers), and the rest are the same.

[0064] The component A includes the following components in parts by weight: 48.3 parts of water-based hydroxy acrylic resin, 30 parts of modified silica, 15 parts of dimethyl silicone oil, 2 parts of titanate coupling agent NDZ-201, 0.2 parts of sodium dodecyl sulfate, 2 parts of ethyl orthosilicate, 2 parts of propylene glycol, and 0.5 parts of leveling agent BYK-333.

[0065] Comparative Example 3 The difference between Comparative Example 3 and Example 1 is that the component A of Comparative Example 3 uses an equal amount of silicon dioxide to replace the modified silicon dioxide, and the other components are the same.

[0066] The component A includes the following components in parts by weight: 48.3 parts of water-based hydroxy acrylic resin, 20 parts of 2000 mesh silica, 15 parts of dimethyl silicone oil, 10 parts of wollastonite whiskers, 2 parts of titanate coupling agent NDZ-201, 0.2 parts of sodium dodecyl sulfate, 2 parts of ethyl orthosilicate, 2 parts of propylene glycol, and 0.5 parts of leveling agent BYK-333.

[0067] Comparative Example 4 The difference between Comparative Example 4 and Example 1 is that the preparation method of the modified silicon dioxide is different, and the other aspects are the same.

[0068] The preparation method of the modified silicon dioxide is: (1) Add 2000 mesh silica and tartaric acid to a 1 mol / L hydrochloric acid solution, stir evenly at 500 rpm, add sodium hydroxide to adjust the pH to 10, and dry to obtain a precursor; the mass ratio of the silica, tartaric acid, and hydrochloric acid solution is 1:0.06:3; (2) Adding vinylidene fluoride, acrylic acid, and potassium persulfate to dimethyl sulfoxide, reacting at 80° C. for 3 hours under nitrogen protection to obtain a modified liquid; the mass ratio of the vinylidene fluoride, acrylic acid, potassium persulfate, and dimethyl sulfoxide is 1:1.1:0.04:8.

[0069] (3) Adding azobisisobutyronitrile and a precursor to a modified liquid, reacting at 80°C for 3 hours under nitrogen protection, washing, and drying to obtain modified silicon dioxide. The mass ratio of azobisisobutyronitrile, precursor, and modified liquid is 0.04:0.4:1.

[0070] Comparative Example 5 The difference between Comparative Example 5 and Example 1 is that the preparation method of the modified silicon dioxide is different, and the other aspects are the same.

[0071] The preparation method of the modified silicon dioxide is: (1) Add 2000 mesh silica and tartaric acid to a 1 mol / L hydrochloric acid solution, stir evenly at 500 rpm, add sodium hydroxide to adjust the pH to 10, and dry to obtain a precursor; the mass ratio of the silica, tartaric acid, and hydrochloric acid solution is 1:0.06:3; (2) adding the precursor, stearyl alcohol, and γ-aminopropyl triethoxysilane to water, stirring at a speed of 500 rpm to obtain a mixed solution, washing, and drying to obtain modified silica; the mass ratio of the precursor, stearyl alcohol, γ-aminopropyl triethoxysilane, and water is 1:0.05:0.04:4;

[0072] Test Case 1. Volume 1m 3 Ordinary glass space of size (ordinary glass is 1m 1m 10mm is a glass substrate coated with insulation slurry) and a test glass space, artificially simulate the sunlight source, irradiate for 12 hours, and compare the temperature difference between the two spaces (normal glass temperature - absolute value of test glass temperature).

[0073] 2. Ultraviolet reflectivity: GB / T 2680-2021 Architectural glass.

[0074] Table 1

[0075] It can be seen from Table 1 that the heat-insulating glass of the present invention has an excellent heat-insulating effect.

[0076] Finally, it should be noted that the above embodiments are intended to illustrate the technical solution of the present invention rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention may be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the present invention.

Claims

1. A method for preparing heat-insulating glass, characterized in that: The following steps are involved: The heat-insulating slurry is coated on the glass substrate and solidified to obtain the heat-insulating glass; The thermal insulation slurry includes component A and component B, wherein component A includes the following components in parts by weight: 45 to 52 parts of water-based hydroxy acrylic resin, 16 to 22 parts of modified silica, 12 to 16 parts of dimethyl silicone oil, 8 to 14 parts of wollastonite whiskers, 1 to 3 parts of titanate coupling agent, 0.1 to 0.5 parts of sodium dodecyl sulfate, 1 to 2.5 parts of tetraethyl orthosilicate, 1 to 3 parts of propylene glycol, and 0.4 to 0.8 parts of leveling agent.

2. The method for preparing heat-insulating glass according to claim 1, characterized in that: The B component includes the following components in parts by weight: 15 to 20 parts of an aqueous isocyanate curing agent and 0.5 to 2 parts of a wetting and dispersing agent.

3. The method for preparing heat-insulating glass according to claim 1, characterized in that: The preparation method of the modified silicon dioxide is: (1) Add silicon dioxide and tartaric acid to a hydrochloric acid solution, stir evenly, add sodium hydroxide to adjust the pH to 9.8-10.2, and dry to obtain a precursor; (2) adding the precursor, stearyl alcohol and γ-aminopropyltriethoxysilane into water and stirring evenly to obtain a mixed solution; (3) Add vinylidene fluoride, acrylic acid and potassium persulfate to dimethyl sulfoxide, and react at 75-85°C for 2-4 hours under nitrogen protection to obtain a modified solution; (4) Add azobisisobutyronitrile and the modified liquid to the mixed liquid, react at 75-85°C for 2-4 hours under nitrogen protection, wash, and dry to obtain modified silica.

4. The method for preparing heat-insulating glass according to claim 3, characterized in that: The mass ratio of the silicon dioxide, tartaric acid and hydrochloric acid solution is 1: (0.05-0.08): (2-4); The molar concentration of the hydrochloric acid solution is 0.5-2 mol / L.

5. The method for preparing the heat-insulating glass according to claim 3, characterized in that: The mass ratio of the precursor, stearyl alcohol, γ-aminopropyltriethoxysilane and water is 1: (0.02-0.06): (0.01-0.05): (2-5).

6. The method for preparing the heat-insulating glass according to claim 3, characterized in that: The mass ratio of the vinylidene fluoride, acrylic acid, potassium persulfate and dimethyl sulfoxide is 1: (1-1.2): (0.02-0.05): (4-10).

7. The method for preparing heat-insulating glass according to claim 3, characterized in that: The mass ratio of the azobisisobutyronitrile, the modified liquid and the mixed liquid is (0.02-0.05): (0.2-0.5):

1.

8. The method for preparing heat-insulating glass according to claim 1, characterized in that: The density of the wollastonite whisker is 2.9-3 g / cm 2 , particle size is 80~400 mesh.

9. The method for preparing heat-insulating glass according to claim 1, characterized in that: The curing temperature is 120-150° C., and the curing time is 90-150 min.

10. A heat-insulating glass, characterized in that: The method is prepared by any one of claims 1 to 9.

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