Sound-insulation and heat-insulation intermediate film, preparation method and laminated glass

Abstract

The invention discloses a sound-insulation and heat-insulation intermediate film, a preparation method and laminated glass, and belongs to the technical field of laminated glass. The sound-insulation and heat-insulation middle film comprises a sound-insulation middle layer and heat-insulation surface layers, and the middle layer is located between the surface layers. The surface layer is prepared from the following components in parts by mass: 100 parts of PVB (Polyvinyl Butyral) resin, 20 to 60 parts of plasticizer, 0.1 to 10 parts of ultraviolet light absorber, 0.1 to 10 parts of antioxidant and 0.5 to 1 part of nano heat-insulating composite particle dispersion liquid. The nano heat-insulating composite particle dispersion liquid comprises the following components in parts by mass: 5-10 parts of nano heat-insulating composite particles, 50-80 parts of an organic solvent, 5-15 parts of a dispersion stabilizer and 0.05-0.3 part of a silane coupling agent. By adopting the sound-insulation and heat-insulation intermediate film, the preparation method and the laminated glass, the problem of poor heat-insulation performance of the existing intermediate film can be solved.

Description

Technical Field

[0001] This invention relates to the field of laminated glass technology, and more particularly to a sound-insulating and heat-insulating interlayer film, its preparation method, and laminated glass. Background Technology

[0002] In existing technologies, improvements to the performance of PVB interlayers for laminated glass primarily focus on enhancing sound insulation and basic performance: sound insulation is achieved by designing multi-layer structures and utilizing the damping properties of specific thermoplastic resins. However, existing technologies still have significant shortcomings in optimizing thermal insulation performance, making it difficult to meet the practical application requirements of "integrated sound and thermal insulation."

[0003] Existing methods for improving the thermal insulation performance of laminated glass include employing multi-layer composite structures, introducing infrared absorbers, and adding functional nanoparticles. However, multi-layer composite structures often suffer from insufficient interlayer adhesion between the different materials used in the film, leading to delamination and peeling over long-term use, which compromises glass safety. Furthermore, the multi-layer composite process demands sophisticated production equipment and operational skills, and is prone to issues such as bubbles and wrinkles. Infrared absorbers are easily decomposed at high temperatures, causing their thermal insulation performance to decline over time, and their coverage of the visible light spectrum is insufficient. Finally, functional nanoparticles tend to be unevenly dispersed within the laminated glass, affecting its overall light transmittance. Summary of the Invention

[0004] The purpose of this invention is to provide a sound and heat insulation interlayer, a preparation method, and laminated glass, thereby solving the problem of poor heat insulation performance of existing interlayers.

[0005] To achieve the above objectives, the present invention provides a sound-insulating and heat-insulating intermediate film, comprising a sound-insulating intermediate layer and a heat-insulating surface layer, wherein the intermediate layer is located between the surface layers; the surface layer comprises the following components by weight: 100 parts of PVB resin, 20-60 parts of plasticizer, 0.1-10 parts of ultraviolet absorber, 0.1-10 parts of antioxidant, and 0.5-1 parts of nano heat-insulating composite particle dispersion.

[0006] Preferably, the nano-insulating composite particle dispersion comprises the following components by weight: 5-10 parts of nano-insulating composite particles, 50-80 parts of organic solvent, 5-15 parts of dispersant stabilizer, and 0.05-0.3 parts of silane coupling agent, wherein the particle size of the nano-insulating composite particle dispersion is 100nm-180nm.

[0007] Preferably, the nano-insulating composite particles comprise antimony-doped tin oxide and cesium-doped tungsten oxide, with a mass ratio of antimony-doped tin oxide particles to cesium-doped tungsten oxide particles of 1:1-4:1; the particle size of the antimony-doped tin oxide particles is 20nm-30nm, and the particle size of the cesium-doped tungsten oxide particles is 50nm-60nm.

[0008] Preferably, the organic solvent includes an alcohol-based organic solvent and a plasticizer, with a mass ratio of 3:7; the alcohol-based organic solvent is one of methanol, ethanol, propanol, isopropanol, ethylene glycol, and diethylene glycol; and the plasticizer in the nano-insulating composite particle dispersion is the same as the plasticizer in the surface layer. The dispersant stabilizer is one of polyoxyethylene alkyl ether phosphate, alkyl ether phosphate, and polyoxyethylene alkyl phenyl ether phosphate; The silane coupling agent is one of γ-aminopropyltriethoxysilane, γ-glycidoxypropyltrimethoxysilane, or 3-mercaptopropyltrimethoxysilane.

[0009] Preferably, the degree of acetalization of the PVB resin is 40-80 mol%, the content of vinyl acetate units is ≤30 mol%, the content of vinyl alcohol units is 15-35 mol%, and the average degree of polymerization is 1500-3500. The plasticizer on the surface has a molecular structure containing aromatic rings and an SP value ≥10.0 (cal / cm). 3 ) 1 / 2 One of the following: phthalates with a refractive index of 1.5 or higher, aromatic phosphates, and benzoates; The ultraviolet absorber is one or more of 2-(2'-hydroxy-5'-methylphenyl)benzotriazole, 2-hydroxy-4-methoxybenzophenone, 2-hydroxy-4-n-octyloxybenzophenone, 2-(2'-hydroxy-3',5'-di-tert-butylphenyl)-benzotriazole, 2'-(2'-hydroxy-3'-tert-butyl-5'-methylphenyl)-5-chlorobenzotriazole, 2-(5-chloro-2H-benzotriazole-2-yl)-4,6-bis(1,1-dimethylethyl)phenol, and hexamethylphosphoric triamine. The antioxidant is one or more of the following: pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate], octadecyl β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate, 4,4'-thiobis(6-tert-butyl-3-methylphenol), 1,2-bis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionyl]hydrazine, N,N'-(hexane-1,6-diyl)bis[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionamide], and tris(2,4-di-tert-butylphenyl) phosphite.

[0010] Preferably, the surface layer further includes an adhesive strength modifier, which is one or more of magnesium acetate, potassium acetate, magnesium propionate, potassium propionate, magnesium 2-ethylbutyrate, potassium 2-ethylbutyrate, potassium 2-ethylhexanoate, and magnesium 2-ethylhexanoate; the concentration of magnesium or potassium ions in the surface layer is 1ppm-420ppm.

[0011] Preferably, the intermediate layer is a thermoplastic resin material comprising a hydrogenated block copolymer, wherein the hydrogenated block copolymer comprises polymer block a containing more than 60 mol% aromatic vinyl monomer units and polymer block b containing more than 60 mol% conjugated diene monomer units, and the mass of polymer block a accounts for less than 25% of the total mass of the hydrogenated block copolymer.

[0012] A method for preparing a sound-insulating and heat-insulating interlayer film includes the following steps: S1. Preparation of a dispersion of nano-insulating composite particles; S2. Mix the nano-insulating composite particle dispersion, PVB resin, plasticizer, ultraviolet absorber, antioxidant and adhesion modifier according to the mass ratio; co-extrude the surface layer and the intermediate layer, and obtain the intermediate film after cooling, embossing and winding. The surface temperature of the twin-screw extruder is as follows: Zone 1 (feeding section) temperature is 20℃-50℃, Zone 2 (melting section) temperature is 130℃-150℃, Zone 3 (mixing section) temperature is 135℃-150℃, Zone 4 (exhausting section) temperature is 140℃-150℃, Zone 5 (metering section) temperature is 140℃-150℃, and the die head temperature is 145℃-160℃; the rotation speed is 650rpm-800rpm. The temperature of the intermediate layer single screw extruder is 20℃-50℃ in zone 1 (feeding section), 130℃-150℃ in zone 2 (melting section), 140℃-150℃ in zone 3 (metering section), and 140℃-160℃ at the die head; the rotation speed is 600rpm-800rpm. The co-extrusion die temperature is 160℃-210℃, and the traction speed is 2. -5 ; The surface layer thickness is 200μm-1000μm, the intermediate layer thickness is 100μm-500μm, and the intermediate film thickness is 0.5mm-2.5mm.

[0013] Preferably, the preparation method of the nano-insulating composite particle dispersion in S1 is as follows: S11. Add the nano-insulating composite particles, organic solvent, and silane coupling agent to a ball mill according to the mass ratio and ball mill for 20-30 hours. S12. Add a dispersant stabilizer to the ball milling material and continue grinding for 3-8 hours to obtain a dispersion of nano-insulating composite particles.

[0014] A laminated glass comprising the aforementioned sound-insulating and heat-insulating interlayer film.

[0015] The advantages and positive effects of the sound and heat insulation interlayer film, preparation method, and laminated glass described in this invention are as follows: This invention effectively improves the heat insulation effect of laminated glass by adding antimony-doped tin oxide particles and cesium-doped tungsten oxide nanocomposite particles to the surface layer and modifying them with a silane coupling agent. Adding a plasticizer containing aromatic rings, the same as that used in the surface layer, to the nanocomposite particle dispersion effectively inhibits plasticizer migration and reduces the haze of the laminated glass. Detailed Implementation

[0016] In this application, unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. In case of any inconsistency, the meaning set forth in this specification or derived from the content described herein shall prevail. Furthermore, the terminology used herein is for the purpose of describing embodiments of this application only and is not intended to limit the scope of this application.

[0017] The following examples illustrate the implementation of the present invention in detail.

[0018] A sound-insulating and heat-insulating interlayer film includes a sound-insulating interlayer and a heat-insulating surface layer, with the interlayer located between the surface layers. The surface layer comprises the following components by weight: 100 parts of PVB resin, 20-60 parts of plasticizer, 0.1-10 parts of ultraviolet absorber, 0.1-10 parts of antioxidant, and 0.5-1 parts of nano-heat-insulating composite particle dispersion.

[0019] The nano-insulating composite particle dispersion comprises the following components by weight: 5-10 parts of nano-insulating composite particles, 50-80 parts of organic solvent, 5-15 parts of dispersant stabilizer, and 0.05-0.3 parts of silane coupling agent. The particle size of the nano-insulating composite particle dispersion is 100nm-180nm.

[0020] The nano-insulating composite particles include antimony-doped tin oxide and cesium-doped tungsten oxide, with a mass ratio of antimony-doped tin oxide particles to cesium-doped tungsten oxide particles of 1:1-4:1; the particle size of the antimony-doped tin oxide particles is 20nm-30nm, and the particle size of the cesium-doped tungsten oxide particles is 50nm-60nm.

[0021] The nano-insulating composite particle dispersion uses antimony-doped tin oxide (ATO) and cesium-doped tungsten oxide (CsO) nano-insulating composite particles. Antimony-doped tin oxide (ATO) exhibits excellent shielding performance in the mid-wave near-infrared band (800nm-1200nm), blocking most of the heat in this band. 0.33WO3 exhibits outstanding shielding performance in the 1200nm-2500nm long-wave near-infrared band, compensating for the thermal insulation shortcomings of ATO in the long-wave region. The combination of antimony-doped tin oxide and cesium-doped tungsten oxide can synergistically cover the entire near-infrared band (800-2500nm), avoiding heat leakage caused by the "blind spots" of single particles and significantly improving the thermal insulation rate.

[0022] The organic solvents include alcoholic organic solvents and plasticizers, with a mass ratio of 3:7. The alcoholic organic solvents are one of methanol, ethanol, propanol, isopropanol, ethylene glycol, and diethylene glycol. The plasticizer composition in the nano-insulating composite particle dispersion is the same as that in the surface layer, which is beneficial for promoting the compatibility between the nano-insulating composite particle dispersion and the intermediate layer, reducing the separation and aggregation of the nano-insulating composite particles, and improving the uniformity of the nano-insulating composite particles dispersion in the surface layer. The same plasticizer composition in the nano-insulating composite particle dispersion and the surface layer avoids the introduction of new plasticizers into the surface layer, preventing polarity differences, thereby reducing the migration force of plasticizers from the surface layer to the intermediate layer, reducing the haze of the intermediate film, and improving the insulation effect.

[0023] The dispersant and stabilizer is one of polyoxyethylene alkyl ether phosphate, alkyl ether phosphate, or polyoxyethylene alkylphenyl ether phosphate. The silane coupling agent is one of γ-aminopropyltriethoxysilane, γ-glycidoxypropyltrimethoxysilane, or 3-mercaptopropyltrimethoxysilane. ATO and Cs 0.33 WO3 consists entirely of nano-sized inorganic particles with high surface polarity, making them prone to agglomeration due to polar attraction. Silane coupling agents contain both inorganic (e.g., amino, epoxy) and organic (e.g., alkoxy) ends. The inorganic ends react with the hydroxyl groups on the particle surface to form chemical bonds, while the organic ends bind to the hydroxyl and acetal groups of the PVB resin, reducing particle polarity, mitigating agglomeration, and improving the uniformity of nanoparticle dispersion. Agglomerated particles form large aggregates, changing the near-infrared light shielding mechanism from absorption to scattering, resulting in incomplete coverage of the effective heat insulation band. Silane coupling agents improve the dispersibility of nanoparticles, ensuring uniform dispersion and enhancing the heat insulation effect. The combined action of plasticizers and silane coupling agents improves the surface heat insulation performance.

[0024] The PVB resin has an acetalization degree of 40-80 mol%, a vinyl acetate unit content of ≤30 mol%, a vinyl alcohol unit content of 15-35 mol%, and an average degree of polymerization of 1500-3500. The surface plasticizer has a molecular structure containing aromatic rings and an SP value ≥10.0 (cal / cm). 3 ) 1 / 2 Plasticizers containing aromatic rings can improve compatibility with PVB resin, inhibit the migration of plasticizers from the surface layer to the intermediate layer of the interlayer, and prevent the intermediate layer from becoming hazy and losing its sound insulation properties.

[0025] The ultraviolet absorber is one or more of the following: 2-(2'-hydroxy-5'-methylphenyl)benzotriazole, 2-hydroxy-4-methoxybenzophenone, 2-hydroxy-4-n-octyloxybenzophenone, 2-(2'-hydroxy-3',5'-di-tert-butylphenyl)-benzotriazole, 2'-(2'-hydroxy-3'-tert-butyl-5'-methylphenyl)-5-chlorobenzotriazole, 2-(5-chloro-2H-benzotriazole-2-yl)-4,6-bis(1,1-dimethylethyl)phenol, and hexamethylphosphoric triamine. The antioxidant is one or more of the following: pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate], octadecyl β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate, 4,4'-thiobis(6-tert-butyl-3-methylphenol), 1,2-bis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionyl]hydrazine, N,N'-(hexane-1,6-diyl)bis[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionamide], and tris(2,4-di-tert-butylphenyl) phosphite.

[0026] The surface layer also includes an adhesion modifier, which is one or more of magnesium acetate, potassium acetate, magnesium propionate, potassium propionate, magnesium 2-ethylbutyrate, potassium 2-ethylbutyrate, potassium 2-ethylhexanoate, and magnesium 2-ethylhexanoate. The concentration of magnesium or potassium ions in the surface layer is 1 ppm to 420 ppm.

[0027] The sound and heat insulation interlayer is a thermoplastic resin material comprising a block copolymer hydrogenated compound. The block copolymer hydrogenated compound comprises polymer block a containing more than 60 mol% aromatic vinyl monomer units and polymer block b containing more than 60 mol% conjugated diene monomer units. The mass of polymer block a accounts for less than 25% of the total mass of the block copolymer hydrogenated compound.

[0028] The hydride containing the block copolymer is a triblock copolymer of a polyaromatic vinyl monomer, a polyconjugated diene monomer, and a polyaromatic vinyl monomer. The aromatic vinyl monomer is one of o-methylstyrene, styrene, or 2,4-dimethylstyrene. The conjugated diene is one of butadiene, hexadiene, isoprene, or 1,3-pentadiene.

[0029] Hydrogenation of conjugated dienes forms saturated polyolefin segments with low glass transition temperatures. These segments are elastic at room temperature and are considered soft segments, possessing excellent damping properties. These segments absorb sound wave vibration energy through the elastic deformation of the molecular chain, directly reducing sound wave transmission efficiency and playing a major role in sound insulation within the interlayer. The segments formed by aromatic vinyl monomers are highly rigid with high glass transition temperatures, exhibiting rigidity at room temperature. Their mass percentage (≤25%) avoids excessive hard segments that could lead to brittleness. Their main function is to provide structural support for the soft segments, preventing excessive deformation due to long-term stress or high temperatures, ensuring the stability of damping performance, and preventing a decline in sound insulation over time. The synergistic effect of the flexible polyolefin segments and the rigid aromatic vinyl segments ensures that the interlayer maintains effective sound insulation over a long period.

[0030] The preparation method of the above-mentioned sound and heat insulation interlayer film includes the following steps: S1. Preparation of a dispersion of nano-insulating composite particles; S2. Mix the nano-insulating composite particle dispersion, PVB resin, plasticizer, ultraviolet absorber, antioxidant and adhesion modifier according to the mass ratio; co-extrude the surface layer and the intermediate layer, and obtain the intermediate film after cooling, embossing and winding. The surface layer of the twin-screw extruder has the following temperature zones: Zone 1: 20℃-50℃; Zone 2: 130℃-150℃; Zone 3: 135℃-150℃; Zone 4: 140℃-150℃; Zone 5: 140℃-150℃; Die head temperature: 145℃-160℃; Rotation speed: 650rpm-800rpm. The temperature of the intermediate layer single screw extruder is 20℃-50℃ in zone 1, 130℃-150℃ in zone 2, 140℃-150℃ in zone 3, and 140℃-160℃ at the die head; the speed is 600rpm-800rpm. The co-extrusion die temperature is 160℃-210℃ and the traction speed is 2. -5 ; The surface layer thickness is 200μm-1000μm, the intermediate layer thickness is 100μm-500μm, and the intermediate film thickness is 0.5mm-2.5mm.

[0031] The preparation method of the nano-insulating composite particle dispersion is as follows: S11. Add the nano-insulating composite particles, organic solvent, and silane coupling agent to a ball mill according to the mass ratio and ball mill for 20-30 hours. S12. Add a dispersant stabilizer to the ball milling material and continue grinding for 3-8 hours to obtain a dispersion of nano-insulating composite particles.

[0032] Example 1 A sound-insulating and heat-insulating interlayer film includes a sound-insulating interlayer and a heat-insulating surface layer, with the interlayer located between the surface layers. The surface layer comprises the following components by weight: 100 parts of PVB resin, 40 parts of DPGDB plasticizer, 0.2 parts of UV absorber UV-531, 0.2 parts of antioxidant 1076, and 0.5 parts of nano-heat-insulating composite particle dispersion.

[0033] The nano-insulating composite particle dispersion comprises the following components by weight: 10 parts nano-insulating composite particles, 50 parts organic solvent, 10 parts dispersion stabilizer polyoxyethylene alkyl ether phosphate, and 0.3 parts silane coupling agent KH550.

[0034] The mass ratio of antimony-doped tin oxide particles to cesium-doped tungsten oxide particles in the nano-insulating composite particles is 2:1; the particle size of the antimony-doped tin oxide particles is 20nm-30nm, and the particle size of the cesium-doped tungsten oxide particles is 50nm-60nm. The organic solvent includes 15 parts ethanol and 35 parts DPGDB.

[0035] The surface layer also includes an adhesion modifier, which is an aqueous solution of magnesium acetate. The concentration of magnesium ions is 65 ppm.

[0036] The thermoplastic resin material in the intermediate layer contains 8% by mass of styrene units and 92% by mass of isoprene units, and is a linear hydrogenated styrene / isoprene / styrene triblock copolymer with a tanδ peak temperature of -11.8℃ and a tanδ peak height of 2.5℃, a hydrogenation rate of 93% molar and a weight-average molecular weight of 258,000.

[0037] The preparation method of the above-mentioned sound and heat insulation interlayer film includes the following steps: S1. Preparation of nano-insulating composite particle dispersion.

[0038] S2. Mix the nano-insulating composite particle dispersion, PVB resin, plasticizer, ultraviolet absorber, antioxidant and adhesion modifier according to the mass ratio; co-extrude the surface layer and the intermediate layer, and obtain the intermediate film by cooling, embossing and winding.

[0039] The surface layer of the twin-screw extruder has the following temperature zones: Zone 1: 25℃, Zone 2: 135℃, Zone 3: 140℃, Zone 4: 145℃, Zone 5: 145℃, and Die Head: 150℃; Rotation speed: 700 rpm.

[0040] The temperature of the intermediate layer single screw extruder is 20℃ in zone 1, 130℃ in zone 2, 140℃ in zone 3, and 140℃ at the die head; the rotation speed is 750 rpm.

[0041] The co-extrusion die temperature is 180℃, and the traction speed is 3. .

[0042] The surface layer is 400 μm thick, the intermediate layer is 200 μm thick, and the intermediate film is 1 mm thick.

[0043] The preparation method of modified nano-oxide particles is as follows: S11. Add the nano-insulating composite particles, organic solvent, and silane coupling agent to a ball mill according to the mass ratio and ball mill for 20 hours. S12. Add a dispersant stabilizer to the ball milling material and continue milling for 5 hours to obtain a dispersion of nano-insulating composite particles. The particle size of the dispersion is 120 nm, and no sedimentation occurs within 72 hours.

[0044] Preparation of PVB resin: First, 100 parts of modified polyvinyl alcohol (PVA) were lyophilized into 80-120 mesh powder. This powder was then added to a vortex containing 20°C pure water in a 10L reactor using a feeding tube, forming an 8% PVA solution. The temperature was then sequentially increased to 50°C and 80°C, and stirred for 1 hour each time to ensure complete dissolution of the PVA.

[0045] After cooling the above PVA solution to 25°C, it was transferred to an enamel-lined reactor. 40 parts of n-butyraldehyde, 10 parts of acidic catalyst HCl, and 1 part of surfactant sodium dodecylbenzenesulfonate were added in batches. The reaction was continued for 2-3 hours, then the solution was heated to 45°C-60°C and maintained for 1-3 hours. NaOH solution was slowly added to adjust the pH to above 7 to terminate the reaction. After centrifugation and dehydration, repeated washing with water, and drying in a cyclone dryer, PVB resin powder was obtained. The PVB resin powder had a degree of acetalization of 60 mol%, a vinyl alcohol unit content of 20 mol%, a vinyl acetate unit content of 20 mol%, and an average degree of polymerization of 3200.

[0046] Methods for preparing laminated glass: The aforementioned interlayer film was placed between two sheets of transparent float glass (300mm long × 300mm wide × 2.5mm thick) to form a laminated structure. The resulting structure was placed in a vacuum bag, and the bag was degassed under negative pressure at room temperature for 15 minutes. Then, while maintaining the degassed state, the vacuum bag was heated to 85°C. Upon reaching 85°C, the vacuum bag was cooled naturally until the temperature dropped to 25°C. The pressure was then released to atmospheric pressure.

[0047] Laminated glass that has been pre-pressed using the vacuum bag method described above is pressed in an autoclave at 120℃-140℃ and 2MPa for 25 minutes to obtain laminated glass.

[0048] Example 2 The difference between this embodiment and Embodiment 1 is that the amount of nano-insulating composite particle dispersion added is 0.7 parts.

[0049] Example 3 The difference between this embodiment and Embodiment 1 is that the amount of nano-insulating composite particle dispersion added is 1 part.

[0050] Comparative Example 1 The difference between this comparative example and Example 1 is that the nano-insulating composite particles in this comparative example contain only antimony-doped tin oxide. All other parameters are the same as in Example 1.

[0051] Comparative Example 2 The difference between this comparative example and Example 1 is that the nano-insulating composite particle dispersion in this comparative example does not contain a silane coupling agent.

[0052] Comparative Example 3 The difference between this comparative example and Example 1 is that the plasticizer and surface plasticizer in the organic solvent of the nano-insulating composite particle dispersion in this comparative example are both replaced with 3G8 which does not contain benzene rings.

[0053] The performance of the laminated glasses prepared in Examples 1-3 and Comparative Examples 1-3 was tested, and the results are shown in Table 1.

[0054] Table 1. Performance results of laminated glasses prepared in Examples 1-3 and Comparative Examples 1-3

[0055] The comparison between Comparative Example 1 and Example 1 shows that using a single type of nano-insulating particle significantly reduces the heat insulation rate of the laminated glass. The comparison between Comparative Example 2 and Example 1 shows that the absence of a silane coupling agent in the dispersion affects the uniformity of the nano-insulating particle dispersion, resulting in higher haze and lower peel strength to the glass. The comparison between Comparative Example 3 and Example 1 shows that replacing the plasticizer with a non-aromatic plasticizer leads to plasticizer migration, increased haze, and reduced sound insulation.

[0056] Therefore, by using the sound and heat insulation interlayer film, preparation method and laminated glass described in this invention, the problem of poor heat insulation performance of existing interlayer films can be solved.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solutions of the present invention, and these modifications or equivalent substitutions cannot cause the modified technical solutions to deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. A sound-insulating and heat-insulating interlayer membrane, characterized in that, It includes a sound-insulating intermediate layer and a heat-insulating surface layer, with the intermediate layer located between the surface layers; the surface layer includes the following components by weight: 100 parts of PVB resin, 20-60 parts of plasticizer, 0.1-10 parts of ultraviolet absorber, 0.1-10 parts of antioxidant, and 0.5-1 parts of nano heat-insulating composite particle dispersion.

2. The sound-insulating and heat-insulating interlayer membrane according to claim 1, characterized in that, The nano-insulating composite particle dispersion comprises the following components by weight: 5-10 parts of nano-insulating composite particles, 50-80 parts of organic solvent, 5-15 parts of dispersant stabilizer, and 0.05-0.3 parts of silane coupling agent. The particle size of the nano-insulating composite particle dispersion is 100nm-180nm.

3. The sound-insulating and heat-insulating interlayer membrane according to claim 2, characterized in that: The nano-insulating composite particles include antimony-doped tin oxide and cesium-doped tungsten oxide, with a mass ratio of antimony-doped tin oxide particles to cesium-doped tungsten oxide particles of 1:1-4:1; the particle size of the antimony-doped tin oxide particles is 20nm-30nm, and the particle size of the cesium-doped tungsten oxide particles is 50nm-60nm.

4. The sound-insulating and heat-insulating interlayer membrane according to claim 2, characterized in that: The organic solvent includes alcohol organic solvents and plasticizers, with a mass ratio of alcohol organic solvents to plasticizers of 3:7; the alcohol organic solvent is one of methanol, ethanol, propanol, isopropanol, ethylene glycol, and diethylene glycol; the plasticizer in the nano heat-insulating composite particle dispersion is the same as the plasticizer in the surface layer. The dispersant stabilizer is one of polyoxyethylene alkyl ether phosphate, alkyl ether phosphate, and polyoxyethylene alkyl phenyl ether phosphate; The silane coupling agent is one of γ-aminopropyltriethoxysilane, γ-glycidoxypropyltrimethoxysilane, or 3-mercaptopropyltrimethoxysilane.

5. The sound-insulating and heat-insulating interlayer membrane according to claim 1, characterized in that: The degree of acetalization of the PVB resin is 40-80 mol%, the content of vinyl acetate units is ≤30 mol%, the content of vinyl alcohol units is 15-35 mol%, and the average degree of polymerization is 1500-3500. The plasticizer on the surface has a molecular structure containing aromatic rings and an SP value ≥10.0 (cal / cm). 3 ) 1 / 2 One of the following: phthalates with a refractive index of 1.5 or higher, aromatic phosphates, and benzoates; The ultraviolet absorber is one or more of 2-(2'-hydroxy-5'-methylphenyl)benzotriazole, 2-hydroxy-4-methoxybenzophenone, 2-hydroxy-4-n-octyloxybenzophenone, 2-(2'-hydroxy-3',5'-di-tert-butylphenyl)-benzotriazole, 2'-(2'-hydroxy-3'-tert-butyl-5'-methylphenyl)-5-chlorobenzotriazole, 2-(5-chloro-2H-benzotriazole-2-yl)-4,6-bis(1,1-dimethylethyl)phenol, and hexamethylphosphoric triamine. The antioxidant is one or more of the following: pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate], octadecyl β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate, 4,4'-thiobis(6-tert-butyl-3-methylphenol), 1,2-bis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionyl]hydrazine, N,N'-(hexane-1,6-diyl)bis[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionamide], and tris(2,4-di-tert-butylphenyl) phosphite.

6. The sound-insulating and heat-insulating interlayer membrane according to claim 1, characterized in that: The surface layer also includes an adhesive strength modifier, which is one or more of magnesium acetate, potassium acetate, magnesium propionate, potassium propionate, magnesium 2-ethylbutyrate, potassium 2-ethylbutyrate, potassium 2-ethylhexanoate, and magnesium 2-ethylhexanoate; the concentration of magnesium or potassium ions in the surface layer is 1ppm-420ppm.

7. The sound-insulating and heat-insulating interlayer membrane according to claim 1, characterized in that: The intermediate layer is a thermoplastic resin material comprising a block copolymer hydrogenated compound, wherein the block copolymer hydrogenated compound comprises polymer block a containing more than 60 mol% of aromatic vinyl monomer units and polymer block b containing more than 60 mol% of conjugated diene monomer units, and the mass of polymer block a accounts for less than 25% of the total mass of the block copolymer hydrogenated compound.

8. A method for preparing a sound-insulating and heat-insulating interlayer film according to any one of claims 1-7, characterized in that, Includes the following steps: S1. Preparation of a dispersion of nano-insulating composite particles; S2. Mix the nano-insulating composite particle dispersion, PVB resin, plasticizer, ultraviolet absorber, antioxidant and adhesion modifier according to the mass ratio; The surface layer and the intermediate layer are co-extruded, and the intermediate film is obtained by cooling, embossing, and winding. The surface layer of the twin-screw extruder has the following temperature zones: Zone 1: 20℃-50℃; Zone 2: 130℃-150℃; Zone 3: 135℃-150℃; Zone 4: 140℃-150℃; Zone 5: 140℃-150℃; Die head temperature: 145℃-160℃; Rotation speed: 650rpm-800rpm. The temperature of the intermediate layer single screw extruder is 20℃-50℃ in zone 1, 130℃-150℃ in zone 2, 140℃-150℃ in zone 3, and 140℃-160℃ at the die head; the speed is 600rpm-800rpm. The co-extrusion die temperature is 160℃-210℃, and the traction speed is 2. -5 ; The surface layer thickness is 200μm-1000μm, the intermediate layer thickness is 100μm-500μm, and the intermediate film thickness is 0.5mm-2.5mm.

9. The method for preparing a sound-insulating and heat-insulating interlayer film according to claim 8, characterized in that, The preparation method of the nano-insulating composite particle dispersion in S1 is as follows: S11. Add the nano-insulating composite particles, organic solvent, and silane coupling agent to a ball mill according to the mass ratio and ball mill for 20-30 hours. S12. Add a dispersant and stabilizer to the ball milling material and continue grinding for 3-8 hours to obtain a dispersion of nano-insulating composite particles.

10. A laminated glass, characterized in that: Includes the sound-insulating and heat-insulating intermediate film as described in any one of claims 1-7.

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