Adhesive film and laminated glass

Abstract

The invention provides an adhesive film and laminated glass. The adhesive film comprises a first heat insulation layer, a sound insulation and heat insulation layer and a second heat insulation layer which are sequentially overlapped, the material of the first heat insulation layer comprises an infrared light absorbent and first resin; the materials of the sound insulation and heat insulation layer comprise a heat insulation agent and second resin; the material of the second heat insulation layer comprises an infrared light reflecting agent and third resin; wherein the tan delta of the sound insulation and heat insulation layer is greater than 0.2 at the temperature of 20 DEG C below zero to 50 DEG C. The adhesive film disclosed by the invention realizes dual functions of efficient heat insulation and sound insulation by combining three different principles of absorption type heat insulation, damping sound insulation and reflection type heat insulation. The first heat insulation layer and the second heat insulation layer reduce penetration of heat by absorbing and reflecting infrared light, and the sound insulation and heat insulation layer enhances the heat insulation performance of the adhesive film while improving the sound insulation performance of the adhesive film through the synergistic effect of the high-damping second resin and the heat insulation agent.

Description

Technical Field

[0001] The present invention relates to the technical field of laminated glass, and in particular, to an adhesive film and a laminated glass. Background Art

[0002] The energy radiated by the sun is mainly concentrated in the wavelength range of 200-2500 nm. Among them, the ultraviolet light has the shortest wavelength range, which is 200-400 nm, accounting for 5% of the total solar radiation energy; the visible light wavelength range is 400-780 nm, accounting for 45% of the total solar radiation energy; the near-infrared light has the largest wavelength range, extending from 780 nm to 2500 nm, accounting for 50% of the total solar radiation energy. Ultraviolet light is harmful to irradiated objects, and currently, ultraviolet absorption research is relatively extensive. Laminated glass is obtained by compounding glass and an adhesive film. To achieve the heat insulation effect, it is realized by absorbing or reflecting infrared light.

[0003] Transparent heat-insulating materials can improve their heat insulation performance while ensuring the daylighting of glass, becoming an important means to reduce the cooling energy consumption of buildings. Most of the current products have a single function. Some products absorb infrared light and ultraviolet light, but the heat release after the glass accumulates heat is not considered. As a result, after long-term exposure to the sun, the temperature of the laminated glass is too high, and there is a risk of glass delamination; some products reflect infrared light, but the efficiency is low; there are also some products that achieve heat insulation by blocking the temperature transmission and cannot block the infrared light with high radiation energy, contributing less to indoor cooling. There are few adhesive films with three functions combined because absorbing and emitting infrared light are achieved by adding inorganic or organic nano-fillers. When added to the adhesive film at the same time, it will affect the visible light transmittance. Sound insulation is currently achieved through modification schemes, blending, grafting, or multi-layer compounding, and there are few compound sound insulation and heat insulation schemes.

[0004] The Chinese patent application with the publication number CN210415739U discloses a laminated glass. This laminated glass has 4 layers, and the overall component quality is relatively high, which is not conducive to light weight. The middle sound insulation layer is centrifugal glass wool, and the light transmittance of the overall component is relatively poor. The first heat-insulating adhesive layer and the second heat-insulating adhesive layer are used to block ultraviolet light, so as to achieve the heat insulation effect. The two adhesive layers do not block visible light and infrared light, reducing heat transfer. The nano heat-insulating coating has the functions of absorbing near-infrared light and blocking ultraviolet light. After the coating absorbs light, heat accumulation is likely to occur, and the heat insulation effect is relatively poor.

[0005] The Chinese patent application with the publication number CN220703570U discloses an automobile sunroof protection film with a multi-layer structure and two heat insulation layers, which realizes the heat insulation function through infrared absorption and infrared reflection. However, the number of film layers of this patent is relatively large, the preparation process is complex, and delamination and foaming occur during the use of the multi-layer structure, and the weather resistance is poor. Moreover, this film layer does not have a sound insulation layer, so the sound insulation effect of this film layer is relatively poor. Summary of the Invention

[0006] The main object of the present invention is to provide an adhesive film and laminated glass, so as to solve the problem of poor sound insulation and heat insulation effects of the adhesive film in the prior art.

[0007] To achieve the above object, according to one aspect of the present invention, there is provided an adhesive film, which includes a first heat-insulating layer, a sound-insulating and heat-insulating layer, and a second heat-insulating layer stacked in sequence; the material of the first heat-insulating layer includes an infrared light absorber and a first resin; the material of the sound-insulating and heat-insulating layer includes a heat-insulating agent and a second resin; the material of the second heat-insulating layer includes an infrared light reflector and a third resin; wherein, the sound-insulating and heat-insulating layer has tanδ>0.2 at -20 to 50°C.

[0008] Further, the mass ratio of the infrared light absorber to the first resin is 0.2 to 0.4:100; and / or, the mass ratio of the heat-insulating agent to the second resin is 3 to 7:100; and / or, the mass ratio of the infrared light reflector to the third resin is 0.2 to 0.5:100.

[0009] Further, the glass transition temperature of the second resin is 0 to 35°C; preferably, the second resin is selected from any one or more of polyvinyl butyral, polyvinyl chloride, thermoplastic polyurethane, polyethylene terephthalate, polymethyl methacrylate, polyethyl methacrylate, and poly-n-butyl methacrylate; more preferably, the second resin is selected from any one or more of polyvinyl butyral, polyvinyl chloride, and thermoplastic polyurethane; most preferably, the second resin is a combination of polyvinyl butyral and thermoplastic polyurethane, and the mass ratio of polyvinyl butyral to thermoplastic polyurethane is 1:0.1 to 0.5.

[0010] Further, the heat-insulating agent has a hollow nanostructure; preferably, the particle size of the heat-insulating agent is 1 to 60 nm; and / or, the specific surface area of the heat-insulating agent is 100 to 6000 m 2 / g; preferably, the heat-insulating agent is selected from any one or more of nano-silica aerogel, nano-hollow glass microspheres, and cage-like silsesquioxane; more preferably, the heat-insulating agent is a combination of nano-hollow glass microspheres and cage-like silsesquioxane, and the mass ratio of nano-hollow glass microspheres to cage-like silsesquioxane is 1:0.01 to 0.05.

[0011] Further, the above infrared light absorber is selected from any one or more of indium tin oxide, antimony tin oxide, copper sulfide, and cesium tungsten bronze; preferably, the particle size of the infrared light absorber is 30-60 nm; and / or, the first resin and the third resin are each independently an olefin polymer; preferably, the olefin polymer is selected from any one or more of ethylene-vinyl acetate copolymer, polyolefin elastomer, ethylene-acrylic acid copolymer, ethylene-ethyl acrylate copolymer, ethylene-methacrylic acid copolymer, and ethylene-butyl acrylate copolymer; and / or, the infrared light reflector is selected from any one or more of nano hexagonal boron nitride, nano titanium dioxide, nano zinc oxide, lanthanum hexaboride, and nano aluminum trioxide; preferably, the particle size of the infrared light reflector is 20-100 nm.

[0012] Further, the ratio of the thickness of the first heat insulation layer, the thickness of the sound insulation and heat insulation layer, and the thickness of the second heat insulation layer is (35-45):(50-60):(10-15); and / or, the light transmittance of the adhesive film to light with a wavelength of 700-2200 nm is 10-18%; and / or, the light transmittance of the adhesive film to light with a wavelength of 400-700 nm is 80-86%; and / or, the light transmittance of the adhesive film to light with a wavelength of 200-400 nm is 0.5-3%.

[0013] Further, the material of the first heat insulation layer further includes an ultraviolet light absorber, a first crosslinking agent, a first co-crosslinking agent, and a first coupling agent; preferably, the mass ratio of the ultraviolet light absorber to the first resin is 0.15-0.25:100; and / or, the mass ratio of the first crosslinking agent to the first resin is 2-5:100; and / or, the mass ratio of the first co-crosslinking agent to the first resin is 2-5:100; and / or, the mass ratio of the first coupling agent to the first resin is 1-3:100; preferably, the ultraviolet light absorber is selected from any one or more of benzophenone, bis(2,2,6,6-tetramethyl-4-piperidyl) sebacate, and polybutanedioic acid (4-hydroxy-2,2,6,6-tetramethyl-1-piperidylethanol) ester; and / or, the first crosslinking agent is selected from any one or more of 1,1-bis(tert-butylperoxy)-3,3,5-trimethylcyclohexane, 2,5-dimethyl-2,5-bis(tert-butylperoxy)hexane, tert-butyl peroxy-2-ethylhexyl carbonate, and tert-amyl peroxy-2-ethylhexyl carbonate; and / or, the first co-crosslinking agent is selected from any one or more of trimethylolpropane triacrylate, trimethylolpropane trimethacrylate, and diallyl phthalate; and / or, the first coupling agent is selected from any one or more of 3-(methacryloyloxy)propyltrimethoxysilane, vinyltrimethoxysilane, and vinyltris(2-methoxyethoxy)silane.

[0014] Further, the material of the sound insulation and heat insulation layer further includes a plasticizer; preferably, the mass ratio of the plasticizer to the second resin is 15-25:100; preferably, the plasticizer is selected from any one or more of dimethoxyethylene glycol phthalate, tricresyl phosphate, dipropylene glycol phthalate, triethylene glycol dinonanoate, and coumarone-indene resin.

[0015] Further, the material of the second heat insulation layer further includes a second crosslinking agent, a second co-crosslinking agent, and a second coupling agent; preferably, the mass ratio of the second crosslinking agent to the third resin is 2-5:100; and / or, the mass ratio of the second co-crosslinking agent to the third resin is 2-5:100; and / or, the mass ratio of the second coupling agent to the third resin is 1-2:100; preferably, the second crosslinking agent is selected from any one or more of 1,1-bis(tert-butylperoxy)-3,3,5-trimethylcyclohexane, 2,5-dimethyl-2,5-bis(tert-butylperoxy)hexane, tert-butyl 2-ethylhexyl carbonate peroxide, and tert-amyl 2-ethylhexyl carbonate peroxide; and / or, the second co-crosslinking agent is selected from any one or more of trimethylolpropane triacrylate, trimethylolpropane trimethacrylate, and diallyl phthalate; and / or, the second coupling agent is selected from any one or more of 3-(methacryloyloxy)propyltrimethoxysilane, vinyltrimethoxysilane, and vinyltris(2-methoxyethoxy)silane.

[0016] According to another aspect of the present invention, there is provided a laminated glass including an adhesive film and glass, and the adhesive film is the aforementioned adhesive film; preferably, the sound insulation amount of the laminated glass is 30-45 dB.

[0017] Applying the technical solution of the present invention, the first heat insulation layer contains an infrared light absorber, which can absorb most of the infrared light, helping to reduce the infrared light transmittance of the adhesive film, and thus helping to improve the heat insulation performance of the adhesive film. The presence of the heat insulation agent in the sound insulation and heat insulation layer helps to block infrared light on the one hand, and on the other hand, the heat insulation agent has certain sound insulation performance, thus helping to improve the sound insulation and heat insulation performance of the adhesive film. Controlling the tanδ of the sound insulation and heat insulation layer within the above range at -20 to 50 °C helps to make the adhesive film have high sound insulation performance in a wide temperature range. The second heat insulation layer contains an infrared light reflector, which can reflect the infrared light that is not completely absorbed by the first heat insulation layer and the infrared light generated by the thermal radiation of the first heat insulation layer back, helping to further improve the heat insulation performance of the adhesive film. The adhesive film of the present application realizes the dual functions of high-efficiency heat insulation and sound insulation by combining three different principles of absorption-type heat insulation, damping sound insulation, and reflection-type heat insulation. The first heat insulation layer and the second heat insulation layer respectively reduce the penetration of heat by absorbing and reflecting infrared light, while the sound insulation and heat insulation layer enhances the heat insulation performance of the adhesive film while improving the sound insulation performance of the adhesive film through the synergistic effect of the high-damping second resin and the heat insulation agent. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings forming a part of this application are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0019] Figure 1 A schematic structural diagram of the adhesive film in the embodiment of this application is shown.

[0020] Among them, the above-mentioned drawings include the following reference numerals:

[0021] 1. First heat insulation layer; 2. Sound insulation and heat insulation layer; 3. Second heat insulation layer. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] It should be noted that, without conflict, the embodiments in this application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the drawings and in combination with the embodiments.

[0023] It should be noted that the loss factor tanδ in this application is measured at 1 Hz, 3 °C / min, and with the instrument DMA Q800.

[0024] As analyzed in the background art of this application, there are problems in the prior art that the sound insulation and heat insulation effects of the adhesive film are poor. To solve the above problems, this application provides an adhesive film and laminated glass.

[0025] In a typical embodiment of this application, an adhesive film is provided, as Figure 1 shown, the adhesive film includes a first heat insulation layer 1, a sound insulation and heat insulation layer 2, and a second heat insulation layer 3 stacked in sequence; the material of the first heat insulation layer 1 includes an infrared light absorber and a first resin; the material of the sound insulation and heat insulation layer 2 includes a heat insulation agent and a second resin; the material of the second heat insulation layer 3 includes an infrared light reflector and a third resin; wherein, the sound insulation and heat insulation layer 2 has tanδ > 0.2 at -20 to 50 °C.

[0026] The first heat insulation layer contains an infrared light absorber, which can absorb most of the infrared light, helping to reduce the infrared light transmittance of the film and thus contributing to improving the heat insulation performance of the film. The presence of the heat insulating agent in the sound and heat insulation layer helps to block infrared light on the one hand, and on the other hand, the heat insulating agent has certain sound insulation properties, thus contributing to improving the sound insulation and heat insulation performance of the film. Controlling the tanδ of the sound and heat insulation layer within the above range at -20 to 50 °C helps the film to have high sound insulation performance in a wide temperature range. The second heat insulation layer contains an infrared light reflector, which can reflect back the infrared light that is not completely absorbed by the first heat insulation layer and the infrared light generated by the thermal radiation of the first heat insulation layer, helping to further improve the heat insulation performance of the film. The film of this application realizes the dual functions of high-efficiency heat insulation and sound insulation by combining three different principles of absorption-type heat insulation, damping sound insulation and reflection-type heat insulation. The first heat insulation layer and the second heat insulation layer respectively reduce the penetration of heat by absorbing and reflecting infrared light, while the sound and heat insulation layer enhances the heat insulation performance of the film while improving the sound insulation performance of the film through the synergistic effect of the highly damped second resin and the heat insulating agent.

[0027] In an embodiment of this application, the mass ratio of the above infrared light absorber to the first resin is 0.2 to 0.4:100; and / or, the mass ratio of the heat insulating agent to the second resin is 3 to 7:100; and / or, the mass ratio of the infrared light reflector to the third resin is 0.2 to 0.5:100.

[0028] Too low an addition amount of the infrared light absorber may not be able to fully absorb infrared light, while too high an addition amount of the infrared light absorber may lead to an increase in the thermal conductivity of the material, affecting the heat insulation effect of the film. Preferably controlling the mass ratio of the infrared light absorber to the first resin within the above range helps to improve the performance of the film in absorbing infrared light while improving the thermal stability of the film. Preferably controlling the mass ratio of the heat insulating agent to the second resin within the above range helps the heat insulating agent to form a stable microporous structure, effectively blocking the conduction of heat, providing both heat insulation function and not excessively increasing the hardness of the material, and also contributing to improving the sound insulation effect of the film. Preferably controlling the mass ratio of the infrared light reflector to the third resin within the above range helps the infrared light reflector to form a uniform reflection interface in the third resin matrix, effectively reflecting infrared rays back to the external environment, reducing the transmittance of infrared light, and at the same time reducing the influence of the addition of the infrared light reflector on the transparency and mechanical properties of the film.

[0029] In an embodiment of the present application, the glass transition temperature of the above-mentioned second resin is 0 to 35 °C; preferably, the second resin is selected from any one or more of polyvinyl butyral, polyvinyl chloride, thermoplastic polyurethane, polyethylene terephthalate, polymethyl methacrylate, polyethyl methacrylate, and n-butyl polymethacrylate; more preferably, the second resin is selected from any one or more of polyvinyl butyral, polyvinyl chloride, and thermoplastic polyurethane; most preferably, the second resin is a combination of polyvinyl butyral and thermoplastic polyurethane, and the mass ratio of polyvinyl butyral to thermoplastic polyurethane is 1:0.1 to 0.5.

[0030] Preferably controlling the glass transition temperature of the second resin within the above range helps the second resin to have high damping performance at room temperature. High-damping materials can effectively absorb and attenuate acoustic wave energy, thereby achieving good sound insulation effects. At the same time, the second resin with the above glass transition temperature can maintain flexibility and adhesiveness within a wide temperature range, which is beneficial to the further attenuation of acoustic waves and the blocking of heat. Preferably controlling the type of the second resin within the above range helps to enrich the types of materials of the second resin while improving the sound insulation performance of the adhesive film. Especially when controlling the mass ratio of polyvinyl butyral to thermoplastic polyurethane within the above range, thermoplastic polyurethane generally consists of flexible long chains of polyols as soft segments and diisocyanates and chain extenders as hard segments. The polyol long chains have good compatibility with polyvinyl butyral. After the two materials are compounded, the molecular chains of the two polymers will entangle with each other to form an interpenetrating network structure. Interface interpenetration can achieve a biphasic continuous phase state, without reducing the performance of each phase polymer, broadening the glass transition temperature range, and enhancing its structural damping, which helps to further improve the sound insulation performance of the adhesive film.

[0031] In an embodiment of the present application, the above-mentioned heat insulation agent has a hollow nanostructure; preferably, the particle size of the heat insulation agent is 1 to 60 nm; and / or, the specific surface area of the heat insulation agent is 100 to 6000 m 2 / g; preferably, the heat insulation agent is selected from any one or more of nano-silica aerogel, nano-hollow glass microspheres, and cage-like silsesquioxane; more preferably, the heat insulation agent is a combination of nano-hollow glass microspheres and cage-like silsesquioxane, and the mass ratio of nano-hollow glass microspheres to cage-like silsesquioxane is 1:0.01 to 0.05.

[0032] The heat insulation agent adopts a hollow nanostructure, and the hollow structure can effectively reduce the heat conduction through the solid, liquid or gas medium inside the material. Moreover, the micropores of the hollow nanostructure can scatter and absorb infrared radiation, reducing its penetration in the material, thereby contributing to improving the heat insulation performance of the adhesive film. Preferably controlling the particle size of the heat insulation agent within the above range helps to promote the formation of a good interface between the heat insulation agent and the second resin, and promotes the scattering and absorption of sound waves and heat energy. A higher specific surface area means that the heat insulation agent per unit mass can provide more heat dissipation and sound wave attenuation interfaces. The heat insulation agent with the above specific surface area range helps to increase the infrared and sound wave absorption capabilities of the material, and helps to further improve the heat insulation and sound insulation performance of the adhesive film. Preferably controlling the type of the heat insulation agent within the above range helps to further improve the sound insulation and heat insulation performance of the adhesive film. In particular, controlling the mass ratio of nano-hollow glass microspheres and cage-like silsesquioxane within the above range, the particle size of the cage-like silsesquioxane is 1-3 nm, the particle size is small, and the particle size of the nano-hollow glass microspheres is greater than 20 nm, the particle size is large. When using only nano-hollow glass microspheres, agglomeration is likely to occur when the microsphere spacing is too small, and when the spacing is too large, a heat channel is easily formed, reducing the heat insulation performance of the material. Adding cage-like silsesquioxane can fill the gaps between the nano-hollow glass microspheres, achieving a synergistic heat insulation effect.

[0033] In an embodiment of the present application, the above infrared light absorber is selected from any one or more of indium tin oxide, antimony tin oxide, copper sulfide, and cesium tungsten bronze; preferably, the particle size of the infrared light absorber is 30-60 nm; and / or, the first resin and the third resin are each independently an olefin polymer; preferably, the melt indices of the first resin and the third resin are each independently 2-30 g / 10 min (150 °C, 2.16 kg), specifically, it can be 2 g / 10 min, 5 g / 10 min, 10 g / 10 min, 15 g / 10 min, 20 g / 10 min, 25 g / 10 min, 30 g / 10 min, and the range values between any two values; preferably, the olefin polymer is selected from any one or more of ethylene-vinyl acetate copolymer, polyolefin elastomer, ethylene-acrylic acid copolymer, ethylene-ethyl acrylate copolymer, ethylene-methacrylic acid copolymer, ethylene-butyl acrylate copolymer; and / or, the infrared light reflector is selected from any one or more of nano-hexagonal boron nitride, nano-titanium dioxide, nano-zinc oxide, lanthanum hexaboride, nano-aluminum oxide; preferably, the particle size of the infrared light reflector is 20-100 nm.

[0034] Preferably controlling the types of the infrared light absorber, the first resin, the third resin, and the infrared light reflector within the above ranges helps to improve the heat insulation performance of the adhesive film while enabling the adhesive film to have a high visible light transmittance. Controlling the particle size of the infrared light absorber within the above range helps to improve the dispersion uniformity of the infrared light absorber, thereby helping to improve the infrared absorption performance of the adhesive film. Controlling the particle size of the infrared light reflector within the above range helps to further improve the infrared light reflectivity of the second heat insulation layer.

[0035] In order to further improve the heat insulation and sound insulation performance of the adhesive film while having a high transparency, in an embodiment of the present application, preferably, the ratio of the thickness of the first heat insulation layer 1, the thickness of the sound insulation and heat insulation layer 2, and the thickness of the second heat insulation layer 3 is (35 - 45):(50 - 60):(10 - 15); and / or, the transmittance of the adhesive film to light with a wavelength of 700 - 2200 nm is 10 - 18%; and / or, the transmittance of the adhesive film to light with a wavelength of 400 - 700 nm is 80 - 86%; and / or, the transmittance of the adhesive film to light with a wavelength of 200 - 400 nm is 0.5 - 3%.

[0036] In an embodiment of the present application, the material of the first heat insulation layer 1 further includes an ultraviolet light absorber, a first crosslinking agent, a first co-crosslinking agent, and a first coupling agent; preferably, the mass ratio of the ultraviolet light absorber to the first resin is 0.15 - 0.25:100; and / or, the mass ratio of the first crosslinking agent to the first resin is 2 - 5:100; and / or, the mass ratio of the first co-crosslinking agent to the first resin is 2 - 5:100; and / or, the mass ratio of the first coupling agent to the first resin is 1 - 3:100; preferably, the ultraviolet light absorber is selected from any one or more of benzophenone, bis(2,2,6,6-tetramethyl-4-piperidyl) sebacate, and polybutanedioic acid (4-hydroxy-2,2,6,6-tetramethyl-1-piperidylethyl) ester; and / or, the first crosslinking agent is selected from any one or more of 1,1-bis(tert-butylperoxy)-3,3,5-trimethylcyclohexane, 2,5-dimethyl-2,5-bis(tert-butylperoxy)hexane, tert-butyl peroxy-2-ethylhexyl carbonate, and tert-amyl peroxy-2-ethylhexyl carbonate; and / or, the first co-crosslinking agent is selected from any one or more of trimethylolpropane triacrylate, trimethylolpropane trimethacrylate, and diallyl phthalate; and / or, the first coupling agent is selected from any one or more of 3-(methacryloyloxy)propyltrimethoxysilane, vinyltrimethoxysilane, and vinyltris(2-methoxyethoxy)silane.

[0037] Ultraviolet light absorbers can absorb ultraviolet light, which helps reduce the damage of the adhesive film by ultraviolet light and helps reduce the ultraviolet light transmittance of the adhesive film. Preferably, controlling the mass ratio of the ultraviolet light absorber to the first resin within the above range helps improve the visible light transmittance of the adhesive film while reducing its ultraviolet light transmittance. The appropriate addition of the first crosslinking agent helps enhance the crosslinking degree of the first resin, improve the thermal stability and weather resistance of the adhesive film, enabling it to maintain good physical properties during long-term outdoor use and being less prone to aging or degradation. The addition of the first co-crosslinking agent helps further promote the crosslinking reaction between the first resin molecules, forming a denser three-dimensional network structure, thus helping to improve the tear resistance and temperature resistance of the adhesive film. The appropriate addition of the first coupling agent serves to enhance the interfacial bonding force between the components in the first heat insulation layer, thereby helping to improve the long-term stability and heat insulation effect of the first heat insulation layer.

[0038] In one embodiment of the present application, the material of the sound insulation and heat insulation layer 2 further includes a plasticizer; preferably, the mass ratio of the plasticizer to the second resin is 15-25:100; preferably, the plasticizer is selected from any one or more of dimethoxyethylene glycol phthalate, tricresyl phosphate, dipropylene glycol phthalate, triethylene glycol dinonanoate, and coumarone-indene resin.

[0039] The addition of the plasticizer helps reduce the glass transition temperature of the second resin. Preferably, controlling the mass ratio of the plasticizer to the second resin within the above range helps improve the sound damping performance of the second resin, enabling it to maintain good flexibility and viscoelasticity within a wider temperature range, thus helping to enhance the absorption and attenuation ability of the second resin to sound waves. At the same time, the plasticizer also helps promote the dispersion of the heat insulation agent in the second resin matrix, thereby helping to further improve the heat insulation effect.

[0040] In an embodiment of the present application, the material of the second heat insulation layer 3 further includes a second crosslinking agent, a second co-crosslinking agent, and a second coupling agent; preferably, the mass ratio of the second crosslinking agent to the third resin is 2-5:100; and / or, the mass ratio of the second co-crosslinking agent to the third resin is 2-5:100; and / or, the mass ratio of the second coupling agent to the third resin is 1-2:100; preferably, the second crosslinking agent is selected from any one or more of 1,1-bis(tert-butylperoxy)-3,3,5-trimethylcyclohexane, 2,5-dimethyl-2,5-bis(tert-butylperoxy)hexane, tert-butyl 2-ethylhexyl carbonate peroxide, and tert-amyl 2-ethylhexyl carbonate peroxide; and / or, the second co-crosslinking agent is selected from any one or more of trimethylolpropane triacrylate, trimethylolpropane trimethacrylate, and diallyl phthalate; and / or, the second coupling agent is selected from any one or more of 3-(methacryloyloxy)propyltrimethoxysilane, vinyltrimethoxysilane, and vinyltris(2-methoxyethoxy)silane.

[0041] The appropriate addition of the second crosslinking agent helps to enhance the crosslinking degree of the third resin, helps to improve the thermal stability and weather resistance of the adhesive film, so that it can still maintain good physical properties during long-term outdoor use and is not easy to age or degrade. The addition of the second co-crosslinking agent helps to further promote the crosslinking reaction between the third resin molecules to form a denser three-dimensional network structure, thereby helping to improve the tear resistance and temperature resistance of the adhesive film. The role of adding an appropriate amount of the second coupling agent is to enhance the interfacial bonding force between the components in the second heat insulation layer, thereby helping to improve the long-term stability and heat insulation effect of the second heat insulation layer.

[0042] In another typical embodiment of the present application, a laminated glass is provided, which includes an adhesive film and glass, and the adhesive film is the aforementioned adhesive film; preferably, the sound insulation of the laminated glass is 30-45 dB.

[0043] Since the laminated glass contains the adhesive film of the present application, the laminated glass has high sound insulation and heat insulation performance.

[0044] The beneficial effects of the present application will be further described below in conjunction with embodiments.

[0045] Example 1

[0046] By weight, 100 parts of ethylene-vinyl acetate copolymer (EVA, melt index of 20 g / 10 min), 0.3 part of cesium tungsten bronze (particle size of 45 nm), 0.25 part of bis(2,2,6,6-tetramethyl-4-piperidyl) sebacate, 3 parts of 2,5-dimethyl-2,5-bis(tert-butylperoxy)hexane, 3 parts of diallyl phthalate, and 2 parts of vinyltris(2-methoxyethoxy)silane are mixed to obtain the first heat-insulating layer mixture; 100 parts of polyvinyl butyral (glass transition temperature of 35 °C), 4 parts of nano-hollow glass microspheres (particle size of 30 nm, specific surface area of 1000 m 2 / g), and 20 parts of tricresyl phosphate are mixed to obtain the sound-insulating and heat-insulating layer mixture; 100 parts of EVA (melt index of 20 g / 10 min), 0.3 part of nano-hexagonal boron nitride (particle size of 50 nm), 4 parts of tert-butyl peroxy-2-ethylhexyl carbonate, 3 parts of trimethylolpropane triacrylate, and 1.5 parts of vinyltrimethoxysilane are mixed to obtain the second heat-insulating layer mixture. The first heat-insulating layer mixture, the sound-insulating and heat-insulating layer mixture, and the second heat-insulating layer mixture are co-extruded to obtain the Figure 1 adhesive film as shown. The adhesive film includes a first heat-insulating layer 1, a sound-insulating and heat-insulating layer 2, and a second heat-insulating layer 3 stacked in sequence. The thickness of the adhesive film is 0.8 mm, and the thickness ratio of the first heat-insulating layer 1, the sound-insulating and heat-insulating layer 2, and the second heat-insulating layer 3 is 35:55:10. The sound-insulating and heat-insulating layer 2 has a tanδ>0.2 at -20 to 50 °C.

[0047] Example 2

[0048] The difference from Example 1 is that the weight part of cesium tungsten bronze is 0.2 part, the weight part of nano-hollow glass microspheres is 7 parts, and the weight part of nano-hexagonal boron nitride is 0.2 part, and finally an adhesive film is obtained.

[0049] Example 3

[0050] The difference from Example 1 is that the weight part of cesium tungsten bronze is 0.4 part, the weight part of nano-hollow glass microspheres is 3 parts, and the weight part of nano-hexagonal boron nitride is 0.5 part, and finally an adhesive film is obtained.

[0051] Example 4

[0052] The difference from Example 1 is that the weight part of cesium tungsten bronze is 0.1 part, the weight part of nano-hollow glass microspheres is 8 parts, and the weight part of nano-hexagonal boron nitride is 0.1 part, and finally an adhesive film is obtained.

[0053] Example 5

[0054] The difference from Example 1 is that a combination of polyvinyl butyral (glass transition temperature is 35 °C) and thermoplastic polyurethane (glass transition temperature is 32 °C) is used to replace polyvinyl butyral, and the mass ratio of polyvinyl butyral to thermoplastic polyurethane is 1:0.1, and finally a film is obtained. Among them, the sound insulation and heat insulation layer 2 has tanδ > 0.2 at -25 to 55 °C.

[0055] Example 6

[0056] The difference from Example 1 is that a combination of polyvinyl butyral (glass transition temperature is 35 °C) and thermoplastic polyurethane (glass transition temperature is 32 °C) is used to replace polyvinyl butyral, and the mass ratio of polyvinyl butyral to thermoplastic polyurethane is 1:0.5, and finally a film is obtained. Among them, the sound insulation and heat insulation layer 2 has tanδ > 0.2 at -25 to 55 °C.

[0057] Example 7

[0058] The difference from Example 1 is that polyvinyl chloride (glass transition temperature is 30 °C) is used to replace polyvinyl butyral, and finally a film is obtained.

[0059] Example 8

[0060] The difference from Example 1 is that a combination of nano-hollow glass microspheres (particle size is 30 nm, specific surface area is 1000 m 2 / g) and cage-like silsesquioxane (particle size is 2 nm, specific surface area is 1200 m 2 / g) is used to replace nano-hollow glass microspheres, and the mass ratio of nano-hollow glass microspheres to cage-like silsesquioxane is 1:0.01, and finally a film is obtained.

[0061] Example 9

[0062] The difference from Example 1 is that a combination of nano-hollow glass microspheres (particle size is 30 nm, specific surface area is 1000 m 2 / g) and cage-like silsesquioxane (particle size is 2 nm, specific surface area is 1200 m 2 / g) is used to replace nano-hollow glass microspheres, and the mass ratio of nano-hollow glass microspheres to cage-like silsesquioxane is 1:0.05, and finally a film is obtained.

[0063] Example 10

[0064] The difference from Example 1 is that nano-silica aerogel (particle size is 50 nm, specific surface area is 200 m 2 / g) is used to replace nano-hollow glass microspheres, and finally a film is obtained.

[0065] Example 11

[0066] The difference from Example 1 is that indium tin oxide (particle size of 60 nm) is used to replace cesium tungsten bronze, ethylene-butyl acrylate copolymer (melt index of 50 g / 10 min) is used to replace ethylene-vinyl acetate copolymer, and nano zinc oxide (particle size of 40 nm) is used to replace nano hexagonal boron nitride, and finally a film is obtained.

[0067] Example 12

[0068] The difference from Example 1 is that the thickness ratio of the first heat insulation layer 1, the sound insulation and heat insulation layer 2 and the second heat insulation layer 3 is controlled to be 35:60:10, and finally a film is obtained.

[0069] Example 13

[0070] The difference from Example 1 is that the thickness ratio of the first heat insulation layer 1, the sound insulation and heat insulation layer 2 and the second heat insulation layer 3 is controlled to be 45:50:15, and finally a film is obtained.

[0071] Example 14

[0072] The difference from Example 1 is that the thickness ratio of the first heat insulation layer 1, the sound insulation and heat insulation layer 2 and the second heat insulation layer 3 is controlled to be 50:40:20, and finally a film is obtained.

[0073] Example 15

[0074] The difference from Example 1 is that 100 parts of ethylene-vinyl acetate copolymer (EVA, melt index of 15 g / 10 min), 0.3 parts of cesium tungsten bronze (particle size of 45 nm), 0.15 parts of benzophenone, 5 parts of tert-amyl peroxy-2-ethylhexyl carbonate, 5 parts of trimethylolpropane triacrylate, and 1 part of 3-(methacryloyloxy)propyltrimethoxysilane are mixed to obtain the first heat insulation layer mixture; 100 parts of polyvinyl butyral (glass transition temperature of 35 °C), 4 parts of nano hollow glass microspheres (particle size of 30 nm, specific surface area of 1000 m 2 / g), and 25 parts of triethylene glycol dinonanoate are mixed to obtain the sound insulation and heat insulation layer mixture; 100 parts of EVA (melt index of 15 g / 10 min), 0.3 parts of nano hexagonal boron nitride (particle size of 50 nm), 5 parts of 1,1-bis(tert-butylperoxy)-3,3,5-trimethylcyclohexane, 5 parts of diallyl phthalate, and 2 parts of 3-(methacryloyloxy)propyltrimethoxysilane are mixed to obtain the second heat insulation layer mixture. The first heat insulation layer mixture, the sound insulation and heat insulation layer mixture and the second heat insulation layer mixture are co-extruded to obtain as Figure 1The shown glue film includes a first heat insulation layer 1, a sound insulation and heat insulation layer 2, and a second heat insulation layer 3 which are stacked in sequence. The thickness of the glue film is 0.8 mm, and the thickness ratio of the first heat insulation layer 1, the sound insulation and heat insulation layer 2, and the second heat insulation layer 3 is 35:55:10. The sound insulation and heat insulation layer 2 has tanδ > 0.2 at -20 to 50 °C.

[0075] Comparative Example 1

[0076] The difference from Example 1 is that the sound insulation and heat insulation layer 2 is cancelled, and the thickness ratio of the first heat insulation layer 1 and the second heat insulation layer 3 is 35:10, and finally a glue film is obtained.

[0077] Comparative Example 2

[0078] The difference from Example 1 is that the centrifugal glass wool in the patent application publication number CN210415739U is used to replace the sound insulation and heat insulation layer 2, and finally a glue film is obtained.

[0079] Performance Test

[0080] The glue films and glasses prepared in the examples and comparative examples are assembled to obtain laminated glass, and the sound insulation amount of the laminated glass is tested according to the test method of ISO 140-3:1995 / A1:2004;

[0081] The transmittance of the glue films prepared in the examples and comparative examples to light of 700 - 2200 nm, 400 - 700 nm, and 200 - 400 nm is tested according to the test method of ISO 9050:2003.

[0082] The above performance tests are carried out on the glue films prepared in the examples and comparative examples, and the test results are shown in Table 1.

[0083] Table 1

[0084]

[0085] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0086] The first heat insulation layer contains an infrared light absorber, which can absorb most of the infrared light, helping to reduce the infrared light transmittance of the adhesive film, and thus contributing to improving the heat insulation performance of the adhesive film. The presence of the heat insulation agent in the sound insulation and heat insulation layer helps to block infrared light on the one hand, and on the other hand, the heat insulation agent has certain sound insulation performance, thus contributing to improving the sound insulation and heat insulation performance of the adhesive film. Controlling the tanδ of the sound insulation and heat insulation layer within the above range at -20 to 50 °C helps the adhesive film to have high sound insulation performance in a wide temperature range. The second heat insulation layer contains an infrared light reflector, which can reflect back the infrared light not completely absorbed by the first heat insulation layer and the infrared light generated by the thermal radiation of the first heat insulation layer, helping to further improve the heat insulation performance of the adhesive film. The adhesive film of the present application realizes the dual functions of high-efficiency heat insulation and sound insulation by combining three different principles of absorption-type heat insulation, damping sound insulation and reflection-type heat insulation. The first heat insulation layer and the second heat insulation layer reduce the penetration of heat by absorbing and reflecting infrared light respectively, while the sound insulation and heat insulation layer enhances the heat insulation performance of the adhesive film while improving the sound insulation performance of the adhesive film through the synergistic effect of the highly damped second resin and the heat insulation agent.

[0087] The above are only the embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A film, characterized in that, The adhesive film includes a first heat-insulating layer (1), a sound-insulating and heat-insulating layer (2), and a second heat-insulating layer (3) stacked in sequence; The material of the first heat-insulating layer (1) includes an infrared light absorber and a first resin; The material of the sound-insulating and heat-insulating layer (2) includes a heat-insulating agent and a second resin; The material of the second heat-insulating layer (3) includes an infrared light reflector and a third resin; Wherein, the sound-insulating and heat-insulating layer (2) has a tanδ>0.2 at -20 to 50°C.

2. The adhesive film according to claim 1, wherein The mass ratio of the infrared light absorber to the first resin is 0.2 to 0.4:100; And / or, the mass ratio of the heat-insulating agent to the second resin is 3 to 7:100; And / or, the mass ratio of the infrared light reflector to the third resin is 0.2 to 0.5:

100.

3. The adhesive film according to claim 1 or 2, characterized in that, The glass transition temperature of the second resin is 0 to 35°C; Preferably, the second resin is selected from any one or more of polyvinyl butyral, polyvinyl chloride, thermoplastic polyurethane, polyethylene terephthalate, polymethyl methacrylate, polyethyl methacrylate, and poly-n-butyl methacrylate; More preferably, the second resin is selected from any one or more of polyvinyl butyral, polyvinyl chloride, and thermoplastic polyurethane; Most preferably, the second resin is a combination of polyvinyl butyral and thermoplastic polyurethane, and the mass ratio of polyvinyl butyral to thermoplastic polyurethane is 1:0.1 to 0.

5.

4. The adhesive film according to any one of claims 1 to 3, characterized in that, The heat insulation agent has a hollow nanostructure; preferably, the particle size of the heat insulation agent is 1 to 60 nm; and / or, the specific surface area of the heat insulation agent is 100 to 6000 m 2 / g; Preferably, the heat-insulating agent is selected from any one or more of nano-silica aerogel, nano-hollow glass microspheres, and cage-type silsesquioxane; More preferably, the heat-insulating agent is a combination of nano-hollow glass microspheres and cage-type silsesquioxane, and the mass ratio of nano-hollow glass microspheres to cage-type silsesquioxane is 1:0.01 to 0.

05.

5. The adhesive film according to any one of claims 1 to 4, characterized in that The infrared light absorber is selected from any one or more of indium tin oxide, antimony tin oxide, copper sulfide, and cesium tungsten bronze; preferably, the particle size of the infrared light absorber is 30 to 60 nm; And / or, the first resin and the third resin are each independently an olefin polymer; preferably, the olefin polymer is selected from any one or more of ethylene-vinyl acetate copolymer, polyolefin elastomer, ethylene-acrylic acid copolymer, ethylene-ethyl acrylate copolymer, ethylene-methacrylic acid copolymer, and ethylene-butyl acrylate copolymer; And / or, the infrared light reflector is selected from any one or more of nano-hexagonal boron nitride, nano-titanium dioxide, nano-zinc oxide, lanthanum hexaboride, and nano-aluminum oxide; preferably, the particle size of the infrared light reflector is 20 to 100 nm.

6. The adhesive film according to any one of claims 1 to 5, characterized in that, The thickness ratio of the first heat-insulating layer (1), the sound-insulating and heat-insulating layer (2), and the second heat-insulating layer (3) is (35 to 45):(50 to 60): (10～15)； And / or, the light transmittance of the adhesive film to light with a wavelength of 700 to 2200 nm is 10 to 18%; and / or, the light transmittance of the adhesive film to light with a wavelength of 400 to 700 nm is 80 to 86%; and / or, the light transmittance of the adhesive film to light with a wavelength of 200 to 400 nm is 0.5 to 3%.

7. The adhesive film according to any one of claims 1 to 6, characterized in that, The material of the first heat insulation layer (1) further includes an ultraviolet light absorber, a first crosslinking agent, a first co-crosslinking agent, and a first coupling agent; Preferably, the mass ratio of the ultraviolet light absorber to the first resin is 0.15 - 0.25:100; And / or, the mass ratio of the first crosslinking agent to the first resin is 2 - 5:100; And / or, the mass ratio of the first co-crosslinking agent to the first resin is 2 - 5:100; And / or, the mass ratio of the first coupling agent to the first resin is 1 - 3:100; Preferably, the ultraviolet light absorber is selected from any one or more of benzophenone, bis(2,2,6,6-tetramethyl-4-piperidyl) sebacate, and polybutanedioic acid (4-hydroxy-2,2,6,6-tetramethyl-1-piperidylethyl) ester; And / or, the first crosslinking agent is selected from any one or more of 1,1-bis(tert-butylperoxy)-3,3,5-trimethylcyclohexane, 2,5-dimethyl-2,5-bis(tert-butylperoxy)hexane, tert-butyl 2-ethylhexyl carbonate peroxide, and tert-amyl 2-ethylhexyl carbonate peroxide; And / or, the first co-crosslinking agent is selected from any one or more of trimethylolpropane triacrylate, trimethylolpropane trimethacrylate, and diallyl phthalate; And / or, the first coupling agent is selected from any one or more of 3-(methacryloyloxy)propyltrimethoxysilane, vinyltrimethoxysilane, and vinyltris(2-methoxyethoxy)silane.

8. The adhesive film according to any one of claims 1 to 7, characterized in that, The material of the sound insulation and heat insulation layer (2) further includes a plasticizer; Preferably, the mass ratio of the plasticizer to the second resin is 15 - 25:100; Preferably, the plasticizer is selected from any one or more of dimethoxyethylene glycol phthalate, tricresyl phosphate, dipropylene glycol phthalate, triethylene glycol dinonanoate, and coumarone-indene resin.

9. The adhesive film according to any one of claims 1 to 8, characterized in that, The material of the second heat insulation layer (3) further includes a second crosslinking agent, a second co-crosslinking agent, and a second coupling agent; Preferably, the mass ratio of the second crosslinking agent to the third resin is 2 - 5:100; And / or, the mass ratio of the second co-crosslinking agent to the third resin is 2 - 5:100; And / or, the mass ratio of the second coupling agent to the third resin is 1 - 2:100; Preferably, the second crosslinking agent is selected from any one or more of 1,1-bis(tert-butylperoxy)-3,3,5-trimethylcyclohexane, 2,5-dimethyl-2,5-bis(tert-butylperoxy)hexane, tert-butyl 2-ethylhexyl carbonate peroxide, and tert-amyl 2-ethylhexyl carbonate peroxide; And / or, the second co-crosslinking agent is selected from any one or more of trimethylolpropane triacrylate, trimethylolpropane trimethacrylate, and diallyl phthalate; And / or, the second coupling agent is selected from any one or more of 3-(methacryloyloxy)propyltrimethoxysilane, vinyltrimethoxysilane, and vinyltris(2-methoxyethoxy)silane.

10. A laminated glass, comprising an adhesive film and glass, characterized in that, The adhesive film is the adhesive film described in any one of claims 1 to 9; preferably, the sound insulation amount of the laminated glass is 30 to 45 dB.

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