High-sealing-performance hollow glass and preparation method thereof

Abstract

The invention provides high-airtightness hollow glass and a preparation method thereof, and belongs to the technical field of deep processing of glass. Comprising a hollow glass body and a sealing body bonded and sealed around the hollow glass body; the hollow glass body comprises two glass substrates, the sealing body comprises a first sealant and a second sealant, the first sealant is located on the inner side of the second sealant, the first sealant plays a role in spacing and supporting between the two glass substrates, and the second sealant is a silicone adhesive. The invention has the advantages of long service life, good heat-insulating and energy-saving performance, good flatness and the like.

Description

Technical Field

[0001] The present invention belongs to the technical field of glass deep processing, and particularly relates to a high-sealing insulating glass and a preparation method thereof. Background Art

[0002] Insulating glass is a new type of building material with good heat insulation, sound insulation, aesthetic applicability, and can reduce the self-weight of buildings. It is made of two (or three) pieces of glass, using a high-strength and high-airtight composite adhesive to bond the glass pieces to an aluminum alloy frame containing desiccant to form a high-performance sound-insulating and heat-insulating glass.

[0003] However, the insulating glass in the prior art has the following defects:

[0004] 1. Edge thermal bridge effect: The metal spacer (such as aluminum alloy) has a high thermal conductivity (about 160 W / m·K), which leads to increased heat transfer at the glass edge, reducing the overall heat insulation performance and causing condensation.

[0005] 2. Gas leakage and performance degradation: Butyl rubber is prone to aging (service life of about 10 - 15 years), resulting in an inert gas (such as argon) leakage rate as high as 3 - 5% per year, and the heat insulation performance decays rapidly.

[0006] 3. Complicated process: Multiple processes are required to install the spacer, fill the desiccant, and coat the double-sealant, with high labor costs and easy introduction of errors. Summary of the Invention

[0007] The purpose of the present invention is to provide a high-sealing insulating glass and a preparation method thereof aiming at solving the above problems existing in the prior art, so as to improve the sealing performance of the existing insulating glass.

[0008] The purpose of the present invention can be achieved by the following technical solutions: A high-sealing insulating glass, characterized in that the insulating glass includes an insulating glass body and a sealing body adhesively sealed around the insulating glass body; the insulating glass body includes two glass substrates, the sealing body includes a first sealant and a second sealant, and the first sealant is located inside the second sealant. The first sealant plays a role of spacing and supporting between the two glass substrates, and the second sealant is silicone rubber.

[0009] Preferably, based on parts by weight, the components of the first sealant include: 85-90 parts of polyisobutylene, 5-6 parts of γ-aminopropyltriethoxysilane, 3-4 parts of dicumyl peroxide, 25-30 parts of fumed nano-silica, 15-20 parts of nano-calcium carbonate, 5-10 parts of 3A molecular sieve, 15-20 parts of organosilicon-modified acrylate, 2-3 parts of pentaerythritol tetrakis(β-3,5-di-tert-butyl-4-hydroxyphenyl)ester, 7-10 parts of thermoplastic polyurethane particles, 12-15 parts of toluene, and 1-2 parts of dispersant.

[0010] Preferably, the toluene can be replaced by isopropanol, and the dispersant is BYK-190.

[0011] A method for preparing a highly airtight insulating glass, characterized in that the method comprises the following steps:

[0012] S1. Prepare colloidal solution A:

[0013] A. Weigh an appropriate amount of polyisobutylene according to the mass ratio and heat it to 55-65 °C;

[0014] B. Weigh an appropriate amount of γ-aminopropyltriethoxysilane, fumed nano-silica and nano-calcium carbonate according to the mass ratio, put the fumed nano-silica and nano-calcium carbonate into γ-aminopropyltriethoxysilane, stir evenly and let stand for 10 minutes;

[0015] C. Place the 3A molecular sieve in an oven at 300 °C for dehydration treatment for 2 hours, then cool it to room temperature, and then grind it to obtain 3A molecular sieve powder;

[0016] D. Weigh an appropriate amount of dispersant and the solution obtained in step B and add them to the polyisobutylene treated in step A in sequence, and perform ultrasonic dispersion treatment on the mixed solution. Adopt the intermittent ultrasonic treatment method, pause for 1 minute every 2 minutes of treatment, and the total treatment duration is 40 minutes;

[0017] E. Weigh an appropriate amount of 3A molecular sieve powder and add it to the solution obtained in step C, and use a planetary stirrer to stir the solution at a low speed. The rotation speed of the stirrer is set to 200 rpm and continue for 15-20 minutes;

[0018] F. Weigh an appropriate amount of pentaerythritol tetrakis(β-3,5-di-tert-butyl-4-hydroxyphenyl)ester and add it to the solution obtained in step E in sequence, and continuously perform shear treatment with a high-speed shear disperser during this process for 10-15 minutes. After completing the above steps, store it in a sealed manner to obtain colloidal solution A;

[0019] S2. Prepare colloidal solution B:

[0020] (1) Weigh an appropriate amount of toluene solvent according to the mass ratio and heat it to 50-60° C.;

[0021] (2) Weighing appropriate amounts of dicumyl peroxide and thermoplastic polyurethane according to the mass ratio, adding them into the heated toluene solvent, and fully dissolving and mixing them;

[0022] (3) Weighing an appropriate amount of organosilicon-modified acrylate according to the mass ratio and adding it to the solution obtained in step (2), stirring for 30 minutes under light-proof conditions, and then sealing and storing, thereby obtaining colloid B;

[0023] S3, mixing: taking appropriate amounts of colloid A and colloid B in a weight ratio of 1:1, stirring and mixing them evenly, and performing vacuum degassing under the condition that the vacuum degree is less than or equal to 5 kPa, and the vacuum degassing time is 15 to 20 minutes, so as to obtain the colloid of the first sealant;

[0024] S4, preparing glass substrates: taking a glass substrate and cutting, grinding, washing and steel processing it according to processing requirements, so as to obtain two glass substrates;

[0025] S5. Applying the first sealant: Take a glass substrate and apply a circle of the first sealant on the edge of the glass substrate using an automatic sealant application device. The sealant width is 8 to 10 mm and the sealant depth is 10 to 12 mm.

[0026] S6, bonding: take another glass substrate and bond it to the glass substrate on which the first sealant glue operation has been completed;

[0027] S7, second sealant application: silicone glue is coated on the outer peripheral surface of the assembled insulating glass, and after the first sealant and silicone glue are completely dried, the highly sealed insulating glass is obtained.

[0028] Advantages of the present invention:

[0029] 1. Super long service life: The sealant has long weather resistance and a service life of up to 30 years.

[0030] 2. Various sizes and shapes can be processed: various shapes of products can be processed, and the depth of the hollow cavity can be adjusted within a wide range.

[0031] 3. The appearance of the middle sealant layer is "invisible": the traditional metal spacer profile presents a shiny and perforated surface, while the glass and the frame of the present invention are harmoniously connected and present matte black. The color of the window frame can be reflected on the sealant surface to form a unified visual effect.

[0032] 4. Simplify the traditional hollow glass processing technology and reduce the manufacturing cost: The glass production process of the present invention is highly automated and standardized, which greatly reduces labor costs and reduces manual participation in production errors, thereby ensuring product quality and performance.

[0033] 5. Excellent heat insulation and energy conservation performance: A long-lasting sealing system that can protect against argon leakage. The U(K) value remains stable, reducing the energy consumption of buildings.

[0034] 6. Good flatness: Elastic sealing reduces the "pumping motion" of insulating glass, significantly improving the flatness of the glass and bringing a long-lasting and beautiful building exterior wall. Description of the Drawings

[0035] Figure 1 It is a schematic cross-sectional structure diagram of this insulating glass.

[0036] Figure 2 It is a flowchart of the steps of the present invention.

[0037] In the figure, 1 is the glass substrate; 2 is the first sealant; 3 is the second sealant. Detailed Embodiments

[0038] The following are specific embodiments of the present invention to further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

[0039] Embodiment 1: The structure of the high-sealing insulating glass according to the embodiment of the present invention is as follows:

[0040] As Figure 1 shown: A high-sealing insulating glass includes an insulating glass body and a sealing body adhesively sealed around the insulating glass body; the insulating glass body includes two glass substrates 1, the sealing body includes a first sealant 2 and a second sealant 3, and the first sealant 2 is located inside the second sealant 3. The first sealant 2 plays a role of spacer support between the two glass substrates 1, and the second sealant 3 is silicone sealant.

[0041] In the insulating glass of the present invention, a high-performance sealant is used to replace the structure of molecular sieve + aluminum strip + butyl sealant in traditional insulating glass, making its overall structure more firm and having better sealing performance. At the same time, its surface is matte black, which is more unified with the color of the window frame compared with the bright punched surface of the aluminum strip; it is elastically supported between the two glass substrates 1, which can reduce the "pumping motion" of the insulating glass and significantly improve the flatness of the glass.

[0042] Embodiment 2: The components of the first sealant of the high-sealing insulating glass according to the embodiment of the present invention are as follows:

[0043] By weight, it includes: 85 - 90 parts of polyisobutene, 5 - 6 parts of γ-aminopropyltriethoxysilane, 3 - 4 parts of dicumyl peroxide, 25 - 30 parts of fumed nano-silica, 15 - 20 parts of nano-calcium carbonate, 5 - 10 parts of 3A molecular sieve, 15 - 20 parts of silicone-modified acrylate, 2 - 3 parts of pentaerythritol tetra(β-(3,5-di-tert-butyl-4-hydroxyphenyl)) ester, 7 - 10 parts of thermoplastic polyurethane particles, 12 - 15 parts of toluene, and 1 - 2 parts of dispersant; wherein, toluene can be replaced by isopropanol, and the dispersant is BYK-190.

[0044] Polyisobutene is used as the main material, which has excellent flexibility (elongation rate > 800%) and low-temperature resistance (glass transition temperature < -60°C). Its saturated main-chain structure can effectively inhibit oxidative degradation.

[0045] γ-aminopropyltriethoxysilane is used as a modifier. It can form Si-O-Si covalent bonds with SiO2 on the glass surface through the Si-OH generated by hydrolysis, and the bonding strength reaches more than 15 MPa, significantly improving the adhesion. Its amino functional group can further form a hydrogen bond network with the organic substrate.

[0046] Fumed nano-silica (10 nm) and nano-calcium carbonate (200 nm) are used as fillers. Among them, fumed nano-silica can form a three-dimensional network structure through the sol-gel method, with a low thermal conductivity of 0.12 W / m·K and a reflectivity > 95% for infrared light, which can effectively block heat conduction; while nano-calcium carbonate can provide compressive strength (> 300 MPa) and stress dispersion function.

[0047] Silicone-modified acrylate is used as an interface enhancer. It can form a continuous phase with silicone rubber through hydrogen bonding (O-H···N) and π-π stacking interactions, and the interfacial binding energy is reduced to 12 mJ / m 2 , and the argon leakage rate ≤ 1×10 -6 mbar·l / s·cm 2 .

[0048] Thermoplastic polyurethane particles are used as a dynamic sealing component. It can undergo a glass transition (Tg = 50 - 60°C) under stress, and the molecular chain segments migrate to fill cracks, with a repair efficiency of 85%, which can compensate for the difference in thermal expansion coefficients.

[0049] Example 3: The preparation method of the high-sealing insulating glass in the embodiment of the present invention includes the following steps:

[0050] S1. Prepare colloidal solution A:

[0051] A. Weigh an appropriate amount of polyisobutene according to the mass ratio and heat it to 55 - 65°C to reduce its viscosity;

[0052] B. Weigh appropriate amounts of γ-aminopropyltriethoxysilane, fumed nano-silica, and nano-calcium carbonate according to the mass ratio, put the fumed nano-silica and nano-calcium carbonate into γ-aminopropyltriethoxysilane, stir evenly, and let it stand for 10 minutes; the silane coupling agent needs to react with the surface of the filler, and pretreatment can enhance the interfacial bonding force;

[0053] C. Place the 3A molecular sieve in an oven at 300 °C for dehydration treatment for 2 hours, then cool it to room temperature, and then grind it to obtain 3A molecular sieve powder;

[0054] D. Weigh appropriate amounts of the dispersant and the solution obtained in step B and add them successively to the polyisobutene treated in step A, and perform ultrasonic dispersion treatment on the mixed solution. Adopt the intermittent ultrasonic treatment method, pause for 1 minute every 2 minutes of treatment, and the total treatment duration is 40 minutes; thus avoiding local overheating of the solution and causing the nano-particles to re-aggregate due to temperature rise, and ensuring the dispersion uniformity;

[0055] E. Weigh appropriate amounts of 3A molecular sieve powder according to the mass ratio and add it to the solution obtained in step C, and use a planetary stirrer to stir the solution at a low speed. The rotation speed of the stirrer is set at 200 rpm and lasts for 15 - 20 minutes;

[0056] F. Weigh appropriate amounts of pentaerythritol tetra(β-3,5-di-tert-butyl-4-hydroxyphenyl) ester and add it successively to the solution obtained in step E, and continuously perform shear treatment with a high-speed shear disperser during this process for 10 - 15 minutes. After completing the above steps, the first colloid can be obtained;

[0057] S2. Prepare the second colloid:

[0058] (1) Weigh appropriate amounts of toluene solvent according to the mass ratio and heat it to 50 - 60 °C;

[0059] (2) Weigh appropriate amounts of dicumyl peroxide and thermoplastic polyurethane according to the mass ratio, add them to the heated toluene solvent, and make them fully dissolve and mix;

[0060] (3) Weigh appropriate amounts of organosilicon-modified acrylate according to the mass ratio and add it to the solution obtained in step (2), and stir for 30 minutes under light-shielded conditions. In this way, the second colloid can be obtained;

[0061] S3. Mixing: Take appropriate amounts of the first colloid and the second colloid according to the weight ratio of 1:1, stir and mix evenly, and perform vacuum degassing under the condition that the vacuum degree is less than or equal to 5 kPa. The vacuum degassing duration is 15 - 20 minutes. In this way, the colloid of the first sealant 2 can be obtained;

[0062] S4. Prepare the glass substrate 1: Take the original glass sheet and cut, grind, wash, and temper it according to the processing requirements to obtain two glass substrates 1.

[0063] S5. Apply the first sealant 2: Take a glass substrate 1 and use an automatic sealant application device to apply a circle of the first sealant 2 around the edge of the glass substrate 1, with a sealant width of 8 - 10 mm and a sealant depth of 10 - 12 mm.

[0064] S6. Laminating: Take another glass substrate 1 and bond it together with the glass substrate 1 that has completed the application of the first sealant 2 at intervals; the first sealant 2 becomes jelly-like and has a certain elasticity, so it can play a role of interval support and sealing between the two glass substrates 1.

[0065] S7. Apply the second sealant 3: Coat and fill silicone sealant on the outer peripheral surface of the laminated insulating glass. After the first sealant 2 and the silicone sealant are both dry, the high-sealing insulating glass of the present invention is obtained.

[0066] The present invention replaces the traditional physical bonding and metal spacer with a chemical bonding sealing system, solving three major industry problems of thermal bridge effect, gas leakage, and complex process. Its core innovation points include:

[0067] Interface chemical bond design: Si - O - Si covalent bond and hydrogen bond network enhance the sealing strength and durability;

[0068] Self - repair and thermal resistance optimization: TPU particles and nano - fillers cooperate to reduce the thermal conductivity and compensate for thermal stress;

[0069] Process integration: Cancel multi - step manual operations and achieve automated production.

[0070] This technology can be widely applied to the fields of building curtain walls, energy - saving doors and windows, and special vehicles.

[0071] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Those skilled in the art of the present invention can make various modifications or supplements to the described specific embodiments or use similar ways to replace them, but will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A highly airtight insulating glass, characterized in that, The hollow glass comprises a hollow glass body and a sealing body bonded and sealed around the hollow glass body; the hollow glass body comprises two glass substrates (1), the sealing body comprises a first sealant (2) and a second sealant (3), and the first sealant (2) is located on the inner side of the second sealant (3), the first sealant (2) plays a role of spacing and supporting between the two glass substrates (1), and the second sealant (3) is silicone glue.

2. A highly airtight insulating glass according to claim 1, characterized in that, The components of the first sealant (2) include, by weight, 85-90 parts of polyisobutylene, 5-6 parts of γ-aminopropyltriethoxysilane, 3-4 parts of dicumyl peroxide, 25-30 parts of fumed nano-silica, 15-20 parts of nano-calcium carbonate, 5-10 parts of 3A molecular sieve, 15-20 parts of organosilicon-modified acrylate, 2-3 parts of tetrakis(β-3,5-di-tert-butyl-4-hydroxyphenyl)pentaerythritol ester, 7-10 parts of thermoplastic polyurethane particles, 12-15 parts of toluene and 1-2 parts of dispersant.

3. A highly airtight insulating glass according to claim 12, wherein, The toluene can be replaced by isopropyl alcohol, and the dispersant is BYK-190.

4. A method for preparing the hermetic insulating glass according to claim 1, characterized in that, This method comprises the following steps: S1. Preparation of colloid: A. Weigh an appropriate amount of polyisobutylene according to the mass ratio and heat it to 55-65°C; B. Weigh appropriate amounts of γ-aminopropyltriethoxysilane, fumed nano-silica and nano-calcium carbonate according to the mass ratio, and add the fumed nano-silica and nano-calcium carbonate into the γ-aminopropyltriethoxysilane, stir evenly, and let stand for 10 minutes; C. Place the 3A molecular sieve in an oven at 300°C for dehydration for 2 hours, cool it to room temperature, and then grind it to obtain 3A molecular sieve powder; D. Weigh an appropriate amount of dispersant and the solution obtained in step B according to the mass ratio and add them to the polyisobutylene treated in step A in sequence, and perform ultrasonic dispersion treatment on the mixed solution in an intermittent ultrasonic treatment manner, with each treatment lasting 2 minutes and a pause of 1 minute, and the total treatment time is 40 minutes; E. Weigh an appropriate amount of 3A molecular sieve powder according to the mass ratio and add it to the solution obtained in step C, and stir the solution at a low speed using a planetary mixer with the speed of the mixer set to 200 rpm for 15 to 20 minutes; F. Weigh an appropriate amount of tetrakis(β-3,5-di-tert-butyl-4-hydroxyphenyl)pentaerythritol ester according to the mass ratio and add it to the solution obtained in step E. During this process, a high-speed shearing disperser is used to continuously perform shearing treatment for 10 to 15 minutes. After completing the above steps, the mixture is sealed and stored to obtain colloid A; S2, preparation of colloid B: (1) Weigh an appropriate amount of toluene solvent according to the mass ratio and heat it to 50-60° C.; (2) Weighing appropriate amounts of dicumyl peroxide and thermoplastic polyurethane according to the mass ratio, adding them into the heated toluene solvent, and fully dissolving and mixing them; (3) Weighing an appropriate amount of organosilicon-modified acrylate according to the mass ratio and adding it to the solution obtained in step (2), stirring for 30 minutes under light-proof conditions, and then sealing and storing, thereby obtaining colloid B; S3. Mixing: Appropriately take the first colloid and the second colloid according to a weight ratio of 1:1, stir and mix them evenly, and conduct vacuum degassing under the condition that the vacuum degree is less than or equal to 5 kPa. The vacuum degassing duration is 15 to 20 minutes, and thus the colloid of the first sealant (2) is obtained; S4. Preparing the glass substrate (1): Take the original glass sheet and perform cutting, grinding, washing, and tempering on it according to the processing requirements, and thus two glass substrates (1) are obtained; S5. Applying the first sealant (2): Take a glass substrate (1), and use an automatic sealant application device to apply a circle of the first sealant (2) to the edge of the glass substrate (1). The width of the sealant is 8 to 10 mm, and the depth of the sealant is 10 to 12 mm; S6. Laminating: Take another glass substrate (1) and bond it to the glass substrate (1) that has completed the application of the first sealant (2) at intervals; S7. Applying the second sealant (3): Coat and fill silicone sealant on the outer peripheral surface of the laminated insulating glass. After the first sealant (2) and the silicone sealant are both completely dry, the highly airtight insulating glass of the present invention is obtained.

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