A multi-layer rigid-flexible composite waterproof anticorrosive thermal insulation board and a preparation method thereof

Abstract

The present application relates to the technical field of building waterproofing, corrosion protection and thermal insulation, and discloses a multilayer rigid-flexible composite waterproofing, corrosion protection and thermal insulation board and a preparation method thereof. The multilayer rigid-flexible composite waterproofing, corrosion protection and thermal insulation board comprises, from outside to inside, a TPO weather-resistant waterproof layer, a bonding layer I, a metal steel plate layer, a bonding layer II, an aerogel non-woven fabric thermal insulation layer and a coated steel plate protective layer. The thermal insulation board provided by the present application adopts a multilayer structure, and the materials of the various layers are synergistically matched, thereby solving the technical problem of poor thermal insulation effect of the existing thermal insulation board.

Description

Technical Field

[0001] This invention relates to the field of building waterproofing, anti-corrosion and thermal insulation technology, specifically to a multi-layer rigid-flexible composite waterproof, anti-corrosion and thermal insulation board and its preparation method. Background Technology

[0002] With the rapid development of the construction industry, the performance requirements for waterproofing, corrosion prevention, thermal insulation, weather resistance, and structural protection of buildings are becoming increasingly stringent. Industrial plants, open-air stadiums, and other outdoor buildings are subjected to multiple external damages over long periods, including ultraviolet radiation, high and low temperature cycles, wind and rain erosion, and mechanical wear, resulting in harsh service environments. Traditional waterproofing and insulation structures employ layered laying and on-site splicing processes, which suffer from quality defects such as loose interlayer bonding, low adhesive strength, easy delamination and leakage. Furthermore, the construction process is complex, inefficient, and has high maintenance costs.

[0003] Currently, in existing composite structures, while TPO waterproof membranes possess a certain degree of weather resistance, the UV resistance and aging resistance of conventional formulations still cannot meet the requirements for long-term outdoor use. Adhesive layers often use single adhesives, resulting in poor compatibility with TPO waterproof layers and metal steel plate layers, easily leading to adhesion failure. Aerogel insulation materials, although offering excellent thermal insulation performance, are brittle and easily broken, making composite bonding with metal layers difficult, and the connection between the insulation and protective layers is poor. The metal protective layer is easily corroded, and the surface coating is prone to peeling, failing to provide long-term protection. Furthermore, the mismatch in material properties among the layers of the insulation board in existing composite structures results in the overall structure's waterproof, insulation, weather resistance, and protective performance failing to meet expectations, leading to a short service life.

[0004] For example, patent application CN118082315A discloses a coated metal plate, its preparation method, and a roof. Its polymer adhesive layer consists of multiple layers, making the process complex, and it does not involve the composite design of the insulation layer, thus failing to achieve integrated waterproofing and insulation. Patent application CN113637266A provides a high-weather-resistant TPO waterproof membrane, but it only focuses on optimizing the TPO layer's formulation and does not involve the composite structure design with the metal layer and insulation layer, failing to meet the integrated waterproofing and insulation requirements. Utility model patent CN214144429U discloses a high-weather-resistant, heat-insulating, waterproof, and thermally insulating structure, but its insulation layer directly uses non-woven fabric and / or water-repellent fabric, resulting in a simple design and insufficient insulation performance.

[0005] In addition, the existing composite structure preparation mostly adopts on-site layer construction, and the bonding quality between each layer is greatly affected by the construction environment, which can easily lead to problems such as delamination and hollowing, and the construction efficiency is low and the labor cost is high.

[0006] Therefore, it is very important to develop a multi-layer rigid-flexible composite waterproof, anti-corrosion and heat-insulating board that is adaptable to each layer, tightly connected, has excellent comprehensive performance and is easy to prepare. Summary of the Invention

[0007] To address the above technical problems, this invention provides a multi-layer rigid-flexible composite waterproof and anti-corrosion insulation board and its preparation method. The insulation board provided by this invention adopts a multi-layer structure and the materials of each layer are synergistically matched, which solves the problems of delamination, leakage, poor insulation effect and weak protection performance of existing insulation boards.

[0008] The specific technical solution of the present invention is as follows: According to one aspect of the present invention, a multi-layer rigid-flexible composite waterproof and anti-corrosion insulation board is provided, comprising, from the outside to the inside, a TPO weather-resistant waterproof layer, an adhesive layer I, a metal steel plate layer, an adhesive layer II, an aerogel non-woven insulation layer, and a coated steel plate protective layer.

[0009] In the above technical solution, the thickness of the TPO weather-resistant waterproof layer is 0.5~2.0mm; the thickness of the adhesive layer I is 0.01~0.1mm; the thickness of the metal steel plate layer is 0.5~1.5mm; the thickness of the adhesive layer II is 0.05~0.3mm; the thickness of the aerogel nonwoven insulation layer is 1~3mm; and the thickness of the coated steel plate protective layer is 0.05~0.3mm.

[0010] In the above technical solution, the TPO weather-resistant waterproof layer comprises the following components in parts by weight: 40-60 parts of ethylene-propylene copolymer, 15-25 parts of polypropylene, 5-10 parts of styrene-isoprene copolymer, 10-20 parts of filler, 0.5-1.2 parts of antioxidant, 0.6-1.2 parts of light stabilizer, 0.3-0.8 parts of ultraviolet absorber, 5-10 parts of maleic anhydride-grafted polyolefin, and 1-3 parts of processing aid.

[0011] In the above technical solution, adhesive layer I and adhesive layer II each independently comprise the following components in parts by weight: 50-70 parts of maleic anhydride-grafted polyolefin, 4-8 parts of maleic anhydride-grafted polypropylene wax, 5-10 parts of styrene-ethylene-butene-styrene block copolymer, 12-18 parts of epoxy resin, 5-10 parts of hydrogenated petroleum resin, 1-3 parts of silane coupling agent, and 0.5-1.5 parts of antioxidant.

[0012] In the above technical solution, the metal steel plate layer is a hot-dip aluminum-magnesium-zinc coated steel plate; The coating adhesion of the hot-dip aluminum-magnesium-zinc steel sheet is 80~120g / m². The hot-dip aluminum-magnesium-zinc steel sheet is also phosphated, and the surface contains a phosphate film with a thickness of 5~10μm.

[0013] In the above technical solution, the coated steel plate protective layer consists of a metal steel plate base layer and a coating layer on the surface of the metal steel plate base layer; The base material of the metal steel plate is chrome-plated cold-rolled steel plate; The total thickness of the chrome-plated cold-rolled steel sheet is 0.05~0.3mm, and the chrome layer thickness is 50~100nm; The coating layer is made of PET film or modified PET film.

[0014] In the above technical solution, the aerogel nonwoven insulation layer includes a nonwoven substrate and functional materials and aerogel II sequentially attached to the nonwoven substrate; The functional material is ZIF-8 particles or aerogel I; Aerogel I is a xanthan gum-ZIF-8 composite aerogel; The aerogel II comprises the following raw materials in parts by weight: 20-30 parts of tetraethyl orthosilicate, 40-55 parts of alcohol solution, 0.5-1.0 parts of hydrochloric acid, 0.3-0.6 parts of ammonia, and 60-80 parts of methyltriethoxysilane solution.

[0015] In the above technical solution, the method for preparing the aerogel nonwoven insulation layer includes the following steps: By laminating ZIF-8 particles or aerogel I onto nonwoven fabric, a nonwoven composite material is obtained. Tetraethyl orthosilicate and an alcohol solution are mixed, and hydrochloric acid is added to adjust the pH to 3-4. The reaction is carried out to obtain silica sol. Ammonia water was added to the silica sol to adjust the pH to 7-9 to obtain a precursor solution. The nonwoven composite material was immersed in the precursor solution, taken out, aged and modified in methyltriethoxysilane solution, and dried to obtain an aerogel nonwoven insulation layer.

[0016] In the above technical solution, the nonwoven fabric substrate is polypropylene needle-punched nonwoven fabric with a micron-level textured surface. The depth of the micron-level textured surface is 20~35μm, and the diameter is 1~3mm.

[0017] According to another aspect of the present invention, the present invention also provides a method for preparing the above-mentioned multilayer rigid-flexible composite waterproof, anti-corrosion and heat-insulating board, comprising the following steps: Adhesive coating I is applied to the lower surface of the TPO weather-resistant waterproof layer to form adhesive layer I. A metal steel plate layer is then bonded to the lower surface of adhesive layer I. Adhesive coating II is applied to the lower surface of the metal steel plate layer to form adhesive layer II. An aerogel nonwoven insulation layer is then bonded to the lower surface of adhesive layer II. A film-coated steel plate protective layer is then bonded to the lower surface of the aerogel nonwoven insulation layer. The layers are then hot-pressed together to obtain a multi-layer rigid-flexible composite waterproof and corrosion-resistant insulation board.

[0018] Compared with existing technologies, this invention provides a multi-layer rigid-flexible composite waterproof and anti-corrosion insulation board with a reasonable structural design that achieves integrated waterproofing and insulation: it adopts a six-layer structure consisting of a TPO weather-resistant waterproof layer, adhesive layer I, a metal steel plate layer, adhesive layer II, an aerogel non-woven insulation layer, and a coated steel plate protective layer. From the outside to the inside, it achieves integrated synergy of weather resistance, structural support, thermal insulation, and mechanical protection. It can effectively block rainwater penetration and heat transfer, while resisting external forces such as ultraviolet rays, wind and rain, and mechanical wear. It is suitable for various complex building scenarios, especially for harsh environments such as acid, alkali, salt, heavy corrosion, high temperature, and high humidity. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this invention more apparent, the invention is described in detail below. It should be understood that the invention is not limited to the description herein.

[0020] filler The filler used in this invention is a component known in the art for use in the TPO weather-resistant and waterproof layer of multi-layer composite insulation boards, and this invention is not limited to titanium dioxide and calcium carbonate listed below. In the TPO weather-resistant and waterproof layer of the multi-layer composite insulation board of this invention, the filler's role is to improve the mechanical properties of the insulation board, making the waterproof layer less prone to deformation under certain pressure.

[0021] Antioxidants The antioxidants used in this invention are components known in the art that can be used in multi-layer composite insulation boards, and this invention is not limited to antioxidants B225, 1010, and 1076 listed below. As an example, the antioxidant in the TPO weather-resistant waterproof layer can be a mixture of hindered phenolic antioxidant B225 and antioxidant 1010 in a 1:1 weight ratio. In the TPO weather-resistant waterproof layer of the multi-layer composite insulation board of this invention, the combination of antioxidant B225 and antioxidant 1010 utilizes their different antioxidant mechanisms to exert a synergistic effect. Antioxidant 1010, as a hindered phenolic antioxidant, can provide active hydrogen atoms to capture free radicals generated in the TPO weather-resistant waterproof layer under heat, light, and other conditions, thus terminating the chain oxidation reaction. Antioxidant B225 can decompose the hydroperoxides generated in the TPO weather-resistant waterproof layer during aging, generating stable non-free radical products, thereby inhibiting the further progress of the oxidation reaction and suppressing the oxidative degradation of the TPO weather-resistant waterproof layer during processing, storage, and use, extending the long-term performance of the multi-layer composite insulation board. Antioxidant 1076 can be selected as the antioxidant for the adhesive layer.

[0022] Light stabilizers The light stabilizer used in this invention is a component known in the art for use in the TPO weather-resistant and waterproof layer of multi-layer composite insulation boards, and this invention is not limited to light stabilizer 2020 and light stabilizer UV-327 listed below. As an example, the light stabilizer can be a mixture of light stabilizer 2020 and light stabilizer UV-327 in a weight ratio of 2:1. In the TPO weather-resistant and waterproof layer of the multi-layer composite insulation board of this invention, the light stabilizer resists the aging and damage of the TPO weather-resistant and waterproof layer caused by ultraviolet rays from both free radical capture and ultraviolet absorption aspects, thus extending the service life of the waterproof layer.

[0023] Processing aids The processing aids used in this invention are components known in the art for use in the TPO weather-resistant and waterproof layer of multi-layer composite insulation boards, and this invention is not limited to zinc stearate and paraffin listed below. As an example, the processing aid can be a mixture of zinc stearate and paraffin in a weight ratio of 1:2. In the TPO weather-resistant and waterproof layer of the multi-layer composite insulation board of this invention, zinc stearate and paraffin have internal and external lubricating effects, preventing materials from adhering to equipment, ensuring smooth processing, and ensuring the stable preparation of a high-performance TPO weather-resistant and waterproof layer during production.

[0024] ethylene-propylene copolymer The ethylene-propylene copolymer used in this invention is a component known in the art that can be used in the TPO weather-resistant and waterproof layer of multi-layer composite insulation boards. As an example, the ethylene-propylene copolymer used in this invention has a melt flow rate of 1~3g / 10min measured under test conditions of 230℃ and 2.16kg.

[0025] Maleic anhydride-grafted polyolefin The maleic anhydride-grafted polyolefin used in this invention is a component known in the art that can be used in multilayer composite insulation boards. In this invention, the maleic anhydride-grafted polyolefin used in the TPO weather-resistant waterproof layer has a melt flow rate of 3~5g / 10min, for example, 3g / 10min, 3.5g / 10min, 4g / 10min, 4.5g / 10min, and 5g / 10min, measured under test conditions of 190℃ and 2.16kg; the maleic anhydride grafting rate is 1%~5%, for example, 1%, 2%, 3%, 4%, and 5%; the maleic anhydride-grafted polyolefin used in the adhesive layer has a maleic anhydride grafting rate of 2%~4% and a melt flow rate of 4~6g / 10min (190℃, 2.16kg).

[0026] styrene-isoprene copolymer The styrene-isoprene copolymer used in this invention is a component known in the art that can be used in the TPO weather-resistant and waterproof layer of multilayer composite insulation boards. As an example, the styrene-isoprene copolymer used in this invention has a styrene content of 27% to 31%, for example, the styrene content can be 27%, 28%, 29%, 30%, or 31%.

[0027] Maleic anhydride-grafted polypropylene wax The maleic anhydride-grafted polypropylene wax used in this invention is a component known in the art that can be used in the adhesive layer of multilayer composite insulation boards. As an example, the maleic anhydride-grafted polypropylene wax used in this invention has a softening point of 120~160℃ and an average molecular weight of 5000~20000, and can be used as an adhesive bridge between polar and non-polar materials.

[0028] Epoxy resin The epoxy resin used in this invention is a component known in the art that can be used in the adhesive layer of multilayer composite insulation boards. As an example, the epoxy resin used in this invention has an epoxy equivalent of 2800~3500 and a softening point of 135~155℃, which can significantly improve the bonding strength.

[0029] Hydrogenated petroleum resin The hydrogenated petroleum resin used in this invention is a component known in the art that can be used in the adhesive layer of multi-layer composite insulation boards. As an example, the hydrogenated petroleum resin used in this invention has a softening point of 100~130℃, which enables rapid bonding during high-temperature bonding.

[0030] Multi-layer rigid-flexible composite waterproof and corrosion-resistant insulation board The multi-layer rigid-flexible composite waterproof, anti-corrosion and heat-insulating board of the present invention comprises, from the outside to the inside, a TPO weather-resistant waterproof layer, an adhesive layer I, a metal steel plate layer, an adhesive layer II, an aerogel non-woven fabric heat-insulating layer and a coated steel plate protective layer.

[0031] The metal steel plate layer uses hot-dip aluminum-magnesium-zinc steel plate. The anti-corrosion mechanism is an aluminum-based passivation layer + magnesium sacrificial anode. Its resistance to acid, alkali and salt corrosion is 2 to 3 times better than that of ordinary zinc-aluminum-magnesium steel plate, and it is suitable for a variety of complex environments. The steel plate surface is phosphated, and the phosphate film thickness is 5 to 10 μm, which can improve the adhesion to the adhesive layer and prevent delamination.

[0032] TPO weather-resistant waterproof layer includes the following components: ethylene-propylene copolymer, polypropylene, styrene-isoprene copolymer, filler, antioxidant, light stabilizer, ultraviolet absorber, maleic anhydride grafted polyolefin, and processing aids. In the TPO weather-resistant waterproof layer, the ethylene-propylene copolymer comprises 40-60 parts by weight, preferably 45-55 parts, more preferably 48-52 parts; the polypropylene comprises 15-25 parts by weight, preferably 18-22 parts, more preferably 19-21 parts; the styrene-isoprene copolymer comprises 5-10 parts by weight, preferably 6-9 parts, more preferably 7-8 parts; the filler comprises 10-20 parts by weight, preferably 12-18 parts, more preferably 14-16 parts; and the antioxidant comprises 0.5-1.2 parts by weight, preferably 0. The ingredients are: 0.7-1.0 parts by weight, more preferably 0.8-0.9 parts by weight; the light stabilizer is 0.6-1.2 parts by weight, preferably 0.8-1.0 parts by weight, more preferably 0.85-0.95 parts by weight; the ultraviolet absorber is 0.3-0.8 parts by weight, preferably 0.4-0.7 parts by weight, more preferably 0.5-0.6 parts by weight; the maleic anhydride grafted polyolefin is 5-10 parts by weight, preferably 6-9 parts by weight, more preferably 7-8 parts by weight; and the processing aid is 1-3 parts by weight, preferably 1.5-2.5 parts by weight, more preferably 1.8-2.2 parts by weight.

[0033] Adhesive layer I and adhesive layer II each independently comprise the following components: maleic anhydride-grafted polyolefin, maleic anhydride-grafted polypropylene wax, styrene-ethylene-butene-styrene block copolymer, epoxy resin, hydrogenated petroleum resin, silane coupling agent, and antioxidant. In adhesive layer I or adhesive layer II, the weight percentage of maleic anhydride-grafted polyolefin is 50-70 parts, preferably 55-65 parts, more preferably 58-62 parts; the weight percentage of maleic anhydride-grafted polypropylene wax is 4-8 parts, preferably 5-7 parts, more preferably 5.5-6.5 parts; the weight percentage of styrene-ethylene-butene-styrene block copolymer is 5-10 parts, preferably 6-9 parts, more preferably 7-8 parts, and the styrene content of the styrene-ethylene-butene-styrene block copolymer is 25%-35%, which has good resistance to corrosion. The bonding is more durable under high temperature conditions, and the aging resistance is better and more stable; the epoxy resin has a weight of 12-18 parts, preferably 14-16 parts, more preferably 14.5-15.5 parts; the hydrogenated petroleum resin has a weight of 5-10 parts, preferably 6-9 parts, more preferably 7-8 parts; the silane coupling agent has a weight of 1-3 parts, preferably 1.5-2.5 parts, more preferably 1.8-2.2 parts; the antioxidant has a weight of 0.5-1.5 parts, preferably 0.8-1.2 parts, more preferably 0.9-1.1 parts.

[0034] The TPO weather-resistant waterproof layer, through the use of composite antioxidants, light stabilizers, UV absorbers, and composite fillers, combined with modifications such as maleic anhydride-grafted polyolefins and styrene-isoprene copolymers, significantly improves weather resistance and aging resistance, extending its outdoor service life to over 20 years. The adhesive layer employs a composite formula of maleic anhydride-grafted polyolefins, styrene-ethylene-butene-styrene block copolymers, high-molecular-weight epoxy resin, and hydrogenated petroleum resin, exhibiting good compatibility and strong adhesion with the TPO waterproof layer, metal steel plate layer, and aerogel nonwoven insulation layer. The high strength effectively avoids delamination and hollowing problems; the metal steel plate layer uses hot-dip aluminum-magnesium-zinc coated steel plate, which has excellent corrosion resistance and, combined with phosphating treatment, further improves the bonding reliability; the aerogel non-woven fabric insulation layer solves the problem of aerogel's brittleness and fragility by loading aerogel onto a non-woven fabric substrate through structural design, resulting in excellent thermal insulation performance and low thermal conductivity; the coated film steel protective layer adopts a composite design of chrome-plated cold-rolled steel plate and PET film, which has high mechanical strength, corrosion resistance, and wear resistance, and can effectively protect the internal structure from external damage.

[0035] The aerogel nonwoven insulation layer includes a nonwoven substrate and a functional material and aerogel II sequentially attached to the nonwoven substrate; the functional material is ZIF-8 particles or aerogel I; aerogel I is xanthan gum-ZIF-8 composite aerogel. Aerogel II comprises the following raw materials in parts by weight: 20-30 parts tetraethyl orthosilicate, 40-55 parts alcohol solution, 0.5-1.0 parts hydrochloric acid, 0.3-0.6 parts ammonia, and 60-80 parts methyltriethoxysilane solution; In the preparation of aerogel nonwoven insulation layers, when the functional material is xanthan gum-ZIF-8 composite aerogel, the specific preparation steps are as follows: Zinc nitrate and water were mixed to obtain a zinc nitrate solution; 2-methylimidazole and water were mixed to obtain a 2-methylimidazole solution; 1-3 parts of zinc nitrate solution and 9-25 parts of 2-methylimidazole solution were mixed evenly, reacted, washed, and dried to obtain ZIF-8 particles; Mix 3-4 parts xanthan gum and 50-60 parts water, add 0.07-0.1 parts ZIF-8 particles and stir to mix, add 0.1-0.4 parts glutaraldehyde and mix to obtain a gel precursor. Impregnate the nonwoven fabric in the gel precursor, take it out, let it stand to gel, and dry it to obtain a nonwoven fabric composite material. Tetraethyl orthosilicate and an alcohol solution are mixed, and hydrochloric acid is added to adjust the pH to 3-4. The reaction is carried out to obtain silica sol. Ammonia was added to silica sol to adjust the pH to 7-9 to obtain a precursor solution. The nonwoven composite material was immersed in the precursor solution, taken out, aged and modified in methyltriethoxysilane solution, and dried to obtain an aerogel nonwoven insulation layer.

[0036] In the preparation of aerogel nonwoven insulation layers, when the functional material is ZIF-8 particles, the following preparation steps can be adopted: Zinc nitrate and water were mixed to obtain a zinc nitrate solution; 2-methylimidazole and water were mixed to obtain a 2-methylimidazole solution; the zinc nitrate solution and the 2-methylimidazole solution were mixed evenly to obtain a mixture; the nonwoven fabric was immersed in the mixture, removed, reacted, washed, and dried to obtain a nonwoven fabric-ZIF-8 particle composite material. Tetraethyl orthosilicate and an alcohol solution are mixed, and hydrochloric acid is added to adjust the pH to 3-4. The reaction is carried out to obtain silica sol. Ammonia was added to silica sol to adjust the pH to 7-9 to obtain a precursor solution. The nonwoven composite material was immersed in the precursor solution, taken out, aged and modified in methyltriethoxysilane solution, and dried to obtain an aerogel nonwoven insulation layer.

[0037] This invention relates to an aerogel nonwoven fabric insulation layer that employs a nonwoven fabric substrate sequentially loaded with functional materials and silica aerogel II to form a double-layer thermal insulation structure, achieving low thermal conductivity insulation of the insulation board. The functional material is selected from ZIF-8 particles or xanthan gum-ZIF-8 composite aerogel I, preferably xanthan gum-ZIF-8 composite aerogel: ZIF-8 possesses porous cage-like channels that can trap stagnant air and block solid-state heat conduction; the xanthan gum matrix enhances the bonding force between ZIF-8 particles and the nonwoven fabric substrate, preventing powder shedding, and simultaneously forming secondary microporous thermal insulation channels; silica aerogel II uses tetraethyl orthosilicate as the main raw material, combined with methyltriethoxysilane modification, and forms a three-dimensional nanoporous network through acid-base stepwise catalysis. The nanopores inhibit gas convection heat transfer, and silane modification gives the aerogel flexibility, adapting to board deformation. The double-layer porous thermal insulation system locks in stagnant air layer by layer, weakening heat conduction and convection heat transfer paths, significantly reducing the overall thermal conductivity. When this insulation layer is applied to a multi-layer rigid-flexible composite waterproof and anti-corrosion insulation board, the thermal insulation performance is significantly improved by relying on the synergy of two layers of porous insulation materials compared to a single aerogel coating or ordinary non-woven fabric insulation structure.

[0038] The preparation method of multi-layer rigid-flexible composite waterproof, anti-corrosion and heat-insulating board includes the following steps: Adhesive coating I is applied to the lower surface of the TPO weather-resistant waterproof layer to form adhesive layer I. The metal steel plate layer is then bonded to the lower surface of adhesive layer I. Adhesive coating II is applied to the lower surface of the metal steel plate layer to form adhesive layer II. The aerogel nonwoven insulation layer is then bonded to the lower surface of adhesive layer II. Finally, the film-coated steel plate protective layer is bonded to the lower surface of the aerogel nonwoven insulation layer. The layers are then hot-pressed together to obtain a multi-layer rigid-flexible composite waterproof and corrosion-resistant insulation board.

[0039] The present invention has a simple preparation process and high construction efficiency. During bonding, a factory-made layered hot-pressing composite process is used to replace the traditional on-site layered construction. The composite process of each layer is controllable, the bonding quality is stable, the on-site construction procedures are reduced, the labor cost and construction difficulty are reduced, and the influence of environmental factors on on-site construction is avoided, thereby improving construction efficiency and project quality. The finished product can be directly transported to the site for laying, further shortening the construction cycle. The multi-layer rigid-flexible composite waterproof, anti-corrosion and thermal insulation board of this invention is environmentally friendly and energy-saving with a long service life: each layer formula uses environmentally friendly raw materials, with no organic solvent volatilization, and will not cause environmental pollution; the aerogel non-woven fabric insulation layer has high thermal insulation efficiency, which can effectively reduce building energy consumption and meet the needs of green building development; the materials of each layer work together, and the overall structure has excellent weather resistance, anti-aging and anti-corrosion properties, with a service life of 15 to 20 years, which greatly reduces the later maintenance costs.

[0040] To further illustrate the present invention, the following examples will provide a detailed description. All raw materials used in the following examples and comparative examples of the present invention are commercially available products. Specifically, the ethylene-propylene copolymer is model RCP PD9272, the polypropylene is model HX3800, the maleic anhydride-grafted polyolefin is model AMPLIFY TY 1057H, the styrene-isoprene copolymer is model YH-1225, the epoxy resin is model CYD-019, the styrene-ethylene-butene-styrene block copolymer is model YH-502, and the maleic anhydride-grafted polypropylene wax is model 6452 TP.

[0041] Example 1 The preparation method of multi-layer rigid-flexible composite waterproof, anti-corrosion and heat-insulating board includes the following steps: Preparation of TPO weather-resistant waterproof layer: 40 parts of ethylene-propylene copolymer, 15 parts of polypropylene, 7 parts of styrene-isoprene copolymer, 8 parts of titanium dioxide, 4 parts of calcium carbonate, 1 part of antioxidant (made by mixing antioxidant B225 and antioxidant 1010 in a weight ratio of 1:1), 0.9 parts of light stabilizer (made by mixing light stabilizer 2020 and light stabilizer UV-327 in a weight ratio of 2:1), 0.4 parts of ultraviolet absorber UV328, 6 parts of maleic anhydride grafted polyolefin, and 1.5 parts of processing aid (made by mixing zinc stearate and paraffin in a weight ratio of 1:2) were placed in a high-speed mixer and mixed at 130°C for 18 minutes. The mixture was then fed into a twin-screw extruder and extruded at 190°C. After three-roll calendering and cooling to room temperature, a TPO weather-resistant waterproof layer with a thickness of 0.6 mm was obtained. Preparation of adhesive coating I: 60 parts of maleic anhydride-grafted polyolefin, 5 parts of maleic anhydride-grafted polypropylene wax, 5 parts of styrene-ethylene-butene-styrene block copolymer, 14 parts of epoxy resin, 7 parts of hydrogenated petroleum resin, 2 parts of silane coupling agent KH550 and 0.6 parts of antioxidant 1076 were melt-mixed at 170℃ for 12 min to obtain adhesive coating I; Preparation of Adhesive Coating II: Adhesive coating II was obtained by using the same components and preparation process as adhesive coating I; Preparation of the protective layer for coated steel plate: After grinding, degreasing and drying the surface of the metal steel plate base layer, a PET film is hot-pressed onto the surface of the metal steel plate base layer at 170℃ and 0.4MPa for 4 minutes to obtain a protective layer for coated steel plate with a thickness of 0.15mm (using chrome-plated cold-rolled steel plate as the metal steel plate base layer, the thickness of the metal steel plate base layer is 0.12mm, and the thickness of the chrome layer is 80nm). Preparation of aerogel nonwoven insulation layer: Zinc nitrate and water were mixed at a mass ratio of 2:15 to obtain a zinc nitrate solution; 2-methylimidazole and water were mixed at a mass ratio of 1:1.2 to obtain a 2-methylimidazole solution; 1 part of zinc nitrate solution and 9 parts of 2-methylimidazole solution were mixed evenly, reacted at 150℃ for 3h, washed, and dried to obtain ZIF-8 particles; Mix 3 parts xanthan gum and 50 parts water, add 0.07 parts ZIF-8 particles and stir to mix, add 0.1 parts glutaraldehyde and mix to obtain a gel precursor. Immerse the nonwoven fabric in the gel precursor for 30 min, take it out, let it stand for 12 h to gel, and dry to obtain a nonwoven fabric-aerogel I composite material. Mix 25 parts of tetraethyl orthosilicate and 42 parts of alcohol solution (the alcohol solution includes 35 parts of anhydrous ethanol and 12 parts of deionized water), add 0.8 parts of hydrochloric acid to adjust the pH to 3, and react at 55°C for 1.5 h to obtain silica sol. 0.4 parts ammonia were added to silica sol to adjust the pH to 8 to obtain a precursor solution. The nonwoven fabric-aerogel I composite material was immersed in the precursor solution for 3 minutes, then removed and placed in a 70-part methyltriethoxysilane solution (composed of methyltriethoxysilane and anhydrous ethanol in a molar ratio of 1:15) for aging modification at 50°C for 24 hours. After supercritical drying at 130°C and 1.0 MPa for 10 hours, an aerogel nonwoven fabric insulation layer with a thickness of 1.5 mm was obtained. The nonwoven fabric substrate was polypropylene needle-punched nonwoven fabric with a basis weight of 120 g / m², and the surface was pressed with micron-level textured surface (depth 30 μm, diameter 2 mm). Adhesive coating I is cast and applied to the underside of the TPO weather-resistant waterproof layer to form adhesive layer I. The metal steel plate layer is then bonded to the underside of adhesive layer I (during bonding: hot-pressing at 160℃ and 0.3MPa for 6 minutes). Adhesive coating II is cast and applied to the underside of the metal steel plate layer to form adhesive layer II. The aerogel nonwoven insulation layer is then bonded to the underside of adhesive layer II (during bonding: hot-pressing at 150℃ and 0.2MPa for 5 minutes). Finally, the coated steel plate protective layer is bonded to the aerogel... The lower surface of the non-woven insulation layer (during bonding: hot-pressed at 140℃ and 0.15MPa for 4 minutes), the overall structure after bonding is cooled to room temperature, trimmed and cut to obtain a multi-layer rigid-flexible composite waterproof and anti-corrosion insulation board. The thickness of adhesive layer I is 0.05mm; the thickness of adhesive layer II is 0.15mm; the metal steel plate layer is a hot-dip aluminum-magnesium-zinc coated steel plate with a thickness of 1.2mm, a zinc coating adhesion of 100g / m², and a phosphated film thickness of 8μm.

[0042] Example 2 The preparation method of multi-layer rigid-flexible composite waterproof, anti-corrosion and heat-insulating board includes the following steps: Preparation of TPO weather-resistant waterproof layer: 45 parts of ethylene-propylene copolymer, 15 parts of polypropylene, 5 parts of styrene-isoprene copolymer, 5 parts of titanium dioxide, 5 parts of calcium carbonate, 0.5 parts of antioxidant (made by mixing antioxidant B225 and antioxidant 1010 in a weight ratio of 1:1), 0.6 parts of light stabilizer (made by mixing light stabilizer 2020 and light stabilizer UV-327 in a weight ratio of 2:1), 0.3 parts of ultraviolet absorber UV328, 5 parts of maleic anhydride grafted polyolefin, and 1 part of processing aid (made by mixing zinc stearate and paraffin in a weight ratio of 1:2) were placed in a high-speed mixer and mixed at 130°C for 18 minutes. The mixture was then fed into a twin-screw extruder and extruded at 190°C. After three-roll calendering and cooling to room temperature, a TPO weather-resistant waterproof layer with a thickness of 0.8 mm was obtained. Preparation of adhesive coating I: 50 parts of maleic anhydride-grafted polyolefin, 4 parts of maleic anhydride-grafted polypropylene wax, 5 parts of styrene-ethylene-butene-styrene block copolymer, 12 parts of epoxy resin, 5 parts of hydrogenated petroleum resin, 1 part of silane coupling agent KH550 and 0.5 parts of antioxidant 1076 were melt-mixed at 170℃ for 12 min to obtain adhesive coating I; Preparation of Adhesive Coating II: Adhesive coating II was obtained by using the same components and preparation process as adhesive coating I; Preparation of the protective layer for coated steel plate: After grinding, degreasing and drying the surface of the metal steel plate base layer, a PET film is hot-pressed onto the surface of the metal steel plate base layer at 160℃ and 0.5MPa for 3 minutes to obtain a protective layer for coated steel plate with a thickness of 0.15mm (using chrome-plated cold-rolled steel plate as the metal steel plate base layer, the thickness of the metal steel plate base layer is 0.1mm and the thickness of the chrome layer is 50nm). Preparation of aerogel nonwoven insulation layer: Zinc nitrate and water were mixed at a mass ratio of 2:15 to obtain a zinc nitrate solution; 2-methylimidazole and water were mixed at a mass ratio of 1:1.2 to obtain a 2-methylimidazole solution; 3 parts of zinc nitrate solution and 25 parts of 2-methylimidazole solution were mixed evenly, reacted at 150℃ for 3h, washed, and dried to obtain ZIF-8 particles; Mix 4 parts xanthan gum and 60 parts water, add 0.1 parts ZIF-8 particles and stir to mix, add 0.4 parts glutaraldehyde and mix to obtain a gel precursor. Immerse the nonwoven fabric in the gel precursor for 30 min, take it out, let it stand for 12 h to gel, and dry to obtain a nonwoven fabric-aerogel I composite material. Mix 20 parts of tetraethyl orthosilicate and 40 parts of alcohol solution (the alcohol solution includes 30 parts of anhydrous ethanol and 10 parts of deionized water), add 0.5 parts of hydrochloric acid to adjust the pH to 3, and react at 50°C for 2 hours to obtain silica sol. 0.3 parts ammonia were added to silica sol to adjust the pH to 7 to obtain a precursor solution. The nonwoven fabric-aerogel I composite material was immersed in the precursor solution for 1 min, removed, and placed in a 60-part methyltriethoxysilane solution (composed of methyltriethoxysilane and anhydrous ethanol in a molar ratio of 1:15) for aging modification at 50°C for 10 h. After supercritical drying at 120°C and 0.8 MPa for 8 h, an aerogel nonwoven fabric insulation layer with a thickness of 1.5 mm was obtained. The nonwoven fabric substrate was polypropylene needle-punched nonwoven fabric with a basis weight of 100 g / m², and the surface was pressed with micron-level textured surface (depth 25 μm, diameter 1 mm). Adhesive coating I is cast and applied to the underside of the TPO weather-resistant waterproof layer to form adhesive layer I. The metal steel plate layer is then bonded to the underside of adhesive layer I (during bonding: hot-pressing at 150℃ and 0.2MPa for 8 minutes). Adhesive coating II is cast and applied to the underside of the metal steel plate layer to form adhesive layer II. The aerogel nonwoven insulation layer is then bonded to the underside of adhesive layer II (during bonding: hot-pressing at 140℃ and 0.1MPa for 6 minutes). The coated steel plate protective layer is then bonded to the aerogel... The lower surface of the non-woven fabric insulation layer is hot-pressed at 130℃ and 0.1MPa for 5 minutes during bonding. The composite structure is then cooled to room temperature, trimmed, and cut to obtain a multi-layer rigid-flexible composite waterproof and anti-corrosion insulation board. The thickness of adhesive layer I is 0.05mm; the thickness of adhesive layer II is 0.15mm; the metal steel plate layer is a hot-dip aluminum-magnesium-zinc coated steel plate with a thickness of 1.2mm, a zinc coating adhesion of 80g / m², and a phosphated film thickness of 5μm.

[0043] Example 3 The preparation method of multi-layer rigid-flexible composite waterproof, anti-corrosion and heat-insulating board includes the following steps: Preparation of TPO weather-resistant waterproof layer: 60 parts of ethylene-propylene copolymer, 25 parts of polypropylene, 10 parts of styrene-isoprene copolymer, 10 parts of titanium dioxide, 5 parts of calcium carbonate, 1.2 parts of antioxidant (a mixture of antioxidant B225 and antioxidant 1010 in a weight ratio of 1:1), 1.2 parts of light stabilizer (a mixture of light stabilizer 2020 and light stabilizer UV-327 in a weight ratio of 2:1), 0.8 parts of ultraviolet absorber UV328, 10 parts of maleic anhydride grafted polyolefin, and 3 parts of processing aid (a mixture of zinc stearate and paraffin in a weight ratio of 1:2) were placed in a high-speed mixer and mixed at 130°C for 18 minutes. The mixture was then fed into a twin-screw extruder and extruded at 190°C. After three-roll calendering and cooling to room temperature, a TPO weather-resistant waterproof layer with a thickness of 1.2 mm was obtained. Preparation of adhesive coating I: 70 parts of maleic anhydride-grafted polyolefin, 8 parts of maleic anhydride-grafted polypropylene wax, 10 parts of styrene-ethylene-butene-styrene block copolymer, 18 parts of epoxy resin, 10 parts of hydrogenated petroleum resin, 3 parts of silane coupling agent KH550 and 1.5 parts of antioxidant 1076 were melt-mixed at 170℃ for 12 min to obtain adhesive coating I; Preparation of Adhesive Coating II: Adhesive coating II was obtained by using the same components and preparation process as adhesive coating I; Preparation of the protective layer for coated steel plate: After grinding, degreasing, and drying the surface of the metal steel plate base layer, a PET film is hot-pressed onto the surface of the metal steel plate base layer at 180℃ and 0.5MPa for 3 minutes to obtain a protective layer for coated steel plate with a thickness of 0.15mm (using chrome-plated cold-rolled steel plate as the metal steel plate base layer, with a metal steel plate base layer thickness of 0.07mm and a chrome layer thickness of 100nm). Preparation of aerogel nonwoven insulation layer: Zinc nitrate and water were mixed at a mass ratio of 2:15 to obtain a zinc nitrate solution; 2-methylimidazole and water were mixed at a mass ratio of 1:1.2 to obtain a 2-methylimidazole solution; 2 parts of zinc nitrate solution and 15 parts of 2-methylimidazole solution were mixed evenly, reacted at 150℃ for 3h, washed, and dried to obtain ZIF-8 particles; Mix 3.5 parts xanthan gum and 58 parts water, add 0.09 parts ZIF-8 particles and stir to mix, add 0.3 parts glutaraldehyde and mix to obtain a gel precursor. Immerse the nonwoven fabric in the gel precursor for 30 min, take it out, let it stand for 12 h to gel, and dry to obtain a nonwoven fabric-aerogel I composite material. Mix 25 parts of tetraethyl orthosilicate and 55 parts of alcohol solution (the alcohol solution includes 40 parts of anhydrous ethanol and 15 parts of deionized water), add 1.0 part of hydrochloric acid to adjust the pH to 4, and react at 60°C for 1 hour to obtain silica sol. 0.6 parts of ammonia were added to silica sol to adjust the pH to 9 to obtain a precursor solution. The nonwoven fabric-aerogel I composite material was immersed in the precursor solution for 5 minutes, then removed and placed in 80 parts of methyltriethoxysilane solution (composed of methyltriethoxysilane and anhydrous ethanol in a molar ratio of 1:15) for aging modification at 50°C for 48 hours. After supercritical drying at 140°C and 1.2 MPa for 8 hours, an aerogel nonwoven fabric insulation layer with a thickness of 1.5 mm was obtained. The nonwoven fabric substrate was polypropylene needle-punched nonwoven fabric with a basis weight of 150 g / m² and a surface textured with micron-level uneven texture (depth 40 μm, diameter 3 mm). Adhesive coating I is cast and applied to the underside of the TPO weather-resistant waterproof layer to form adhesive layer I. The metal steel plate layer is then bonded to the underside of adhesive layer I (during bonding: hot-pressing at 170℃ and 0.4MPa for 5 minutes). Adhesive coating II is cast and applied to the underside of the metal steel plate layer to form adhesive layer II. The aerogel nonwoven insulation layer is then bonded to the underside of adhesive layer II (during bonding: hot-pressing at 160℃ and 0.3MPa for 4 minutes). The coated steel plate protective layer is then bonded to the aerogel... The lower surface of the non-woven fabric insulation layer is hot-pressed at 150℃ and 0.2MPa for 3 minutes during bonding. The composite structure is then cooled to room temperature, trimmed, and cut to obtain a multi-layer rigid-flexible composite waterproof and anti-corrosion insulation board. The thickness of adhesive layer I is 0.05mm; the thickness of adhesive layer II is 0.15mm; the metal steel plate layer is a hot-dip aluminum-magnesium-zinc coated steel plate with a thickness of 1.2mm, a zinc coating adhesion of 100g / m², and a phosphated film thickness of 8μm.

[0044] Example 4 The difference between this embodiment and embodiment 3 is that the thickness of the metal steel plate layer is 0.8 mm and the thickness of the aerogel nonwoven fabric insulation layer is 2.0 mm.

[0045] Example 5 The difference between this embodiment and embodiment 3 is that the thickness of the metal steel plate layer is 0.8 mm and the thickness of the aerogel nonwoven fabric insulation layer is 2.5 mm.

[0046] Example 6 The difference between this embodiment and embodiment 3 is that the thickness of the metal steel plate layer is 0.8 mm and the thickness of the aerogel nonwoven fabric insulation layer is 3.0 mm.

[0047] Example 7 The difference between this embodiment and Embodiment 3 is as follows: Preparation of aerogel nonwoven insulation layer: Zinc nitrate and water were mixed at a mass ratio of 2:15 to obtain a zinc nitrate solution; 2-methylimidazole and water were mixed at a mass ratio of 1:1.2 to obtain a 2-methylimidazole solution; 2 parts of zinc nitrate solution and 15 parts of 2-methylimidazole solution were mixed evenly, reacted at 150℃ for 3h, washed, and dried to obtain ZIF-8 particles; Mix 3.5 parts xanthan gum and 58 parts water, add 0.09 parts ZIF-8 particles and stir to mix, then add 0.3 parts glutaraldehyde and mix to obtain a gel precursor. Impregnate the nonwoven fabric in the gel precursor, remove it, let it stand to gel, and dry it to obtain an aerogel nonwoven insulation layer with a thickness of 1.5 mm. The nonwoven fabric substrate is polypropylene needle-punched nonwoven fabric with a basis weight of 150 g / m² and a surface with micron-level textured surface (depth 40 μm, diameter 3 mm).

[0048] Example 8 The difference between this embodiment and Embodiment 3 is as follows: Preparation of aerogel nonwoven insulation layer: 25 parts of tetraethyl orthosilicate and 55 parts of alcohol solution (the alcohol solution includes 40 parts of anhydrous ethanol and 15 parts of deionized water) were mixed, 1.0 part of hydrochloric acid was added to adjust the pH to 4, and the mixture was reacted at 60℃ for 1 h to obtain silica sol. 0.6 parts of ammonia were added to silica sol to adjust the pH to 9 to obtain a precursor solution. The nonwoven fabric was immersed in the precursor solution, removed, and placed in an 80-part methyltriethoxysilane solution (composed of methyltriethoxysilane and anhydrous ethanol in a molar ratio of 1:15) for aging modification at 50°C for 48 hours. It was then supercritically dried at 140°C and 1.2 MPa for 8 hours to obtain an aerogel nonwoven insulation layer with a thickness of 1.5 mm. The nonwoven fabric substrate was a polypropylene needle-punched nonwoven fabric with a basis weight of 150 g / m², and the surface was pressed with micron-level textured surface (depth 40 μm, diameter 3 mm).

[0049] Example 9 The difference between this embodiment and Embodiment 3 is as follows: Preparation of aerogel nonwoven insulation layer: Zinc nitrate and water were mixed at a mass ratio of 2:15 to obtain a zinc nitrate solution; 2-methylimidazole and water were mixed at a mass ratio of 1:1.2 to obtain a 2-methylimidazole solution; 2 parts of zinc nitrate solution and 15 parts of 2-methylimidazole solution were mixed evenly, reacted at 150℃ for 3h, washed, and dried to obtain ZIF-8 particles; Mix 3.5 parts gelatin and 58 parts water, add 0.09 parts ZIF-8 particles and stir to mix, add 0.3 parts glutaraldehyde and mix to obtain a gel precursor. Immerse the nonwoven fabric in the gel precursor for 30 min, take it out, let it stand for 12 h to gel, and dry to obtain a nonwoven fabric-aerogel I composite material. Mix 25 parts of tetraethyl orthosilicate and 55 parts of alcohol solution (the alcohol solution includes 40 parts of anhydrous ethanol and 15 parts of deionized water), add 1.0 part of hydrochloric acid to adjust the pH to 4, and react at 60°C for 1 hour to obtain silica sol. 0.6 parts of ammonia were added to the silica sol to adjust the pH to 9 to obtain a precursor solution. The nonwoven fabric-aerogel I composite material was immersed in the precursor solution for 5 min, removed, and placed in 80 parts of methyltriethoxysilane solution (composed of methyltriethoxysilane and anhydrous ethanol in a molar ratio of 1:15) for aging modification at 50°C for 48 h. After supercritical drying at 140°C and 1.2 MPa for 8 h, an aerogel nonwoven fabric insulation layer with a thickness of 1.5 mm was obtained. The nonwoven fabric substrate was polypropylene needle-punched nonwoven fabric with a basis weight of 150 g / m² and a surface textured with micron-level concave and convex textures (depth 40 μm, diameter 3 mm).

[0050] Example 10 The difference between this embodiment and Embodiment 3 is as follows: Preparation of aerogel nonwoven insulation layer: Zinc nitrate and water were mixed at a mass ratio of 2:15 to obtain a zinc nitrate solution; 2-methylimidazole and water were mixed at a mass ratio of 1:1.2 to obtain a 2-methylimidazole solution; 2 parts of zinc nitrate solution and 15 parts of 2-methylimidazole solution were mixed evenly, reacted at 150℃ for 3 hours, washed, and dried to obtain ZIF-8 particles; Mix 3.5 parts of methylcellulose and 58 parts of water, add 0.09 parts of ZIF-8 particles and stir to mix, add 0.3 parts of glutaraldehyde and mix to obtain a gel precursor. Immerse the nonwoven fabric in the gel precursor for 30 min, take it out, let it stand for 12 h to gel, and dry to obtain a nonwoven fabric-aerogel I composite material. Mix 25 parts of tetraethyl orthosilicate and 55 parts of alcohol solution (the alcohol solution includes 40 parts of anhydrous ethanol and 15 parts of deionized water), add 1.0 part of hydrochloric acid to adjust the pH to 4, and react at 60°C for 1 hour to obtain silica sol. 0.6 parts of ammonia were added to the silica sol to adjust the pH to 9 to obtain a precursor solution. The nonwoven fabric-aerogel I composite material was immersed in the precursor solution for 5 min, removed, and placed in 80 parts of methyltriethoxysilane solution (composed of methyltriethoxysilane and anhydrous ethanol in a molar ratio of 1:15) for aging modification at 50°C for 48 h. After supercritical drying at 140°C and 1.2 MPa for 8 h, an aerogel nonwoven fabric insulation layer with a thickness of 1.5 mm was obtained. The nonwoven fabric substrate was polypropylene needle-punched nonwoven fabric with a basis weight of 150 g / m² and a surface textured with micron-level concave and convex textures (depth 40 μm, diameter 3 mm).

[0051] Example 11 Preparation of aerogel nonwoven insulation layer: Zinc nitrate and water were mixed at a mass ratio of 2:15 to obtain a zinc nitrate solution; 2-methylimidazole and water were mixed at a mass ratio of 1:1.2 to obtain a 2-methylimidazole solution; 2 parts of zinc nitrate solution and 15 parts of 2-methylimidazole solution were mixed evenly to obtain a mixture; the nonwoven fabric was immersed in the mixture for 30 min, removed, reacted at 150℃ for 3 h, washed, and dried to obtain a nonwoven fabric-ZIF-8 particle composite material; Mix 25 parts of tetraethyl orthosilicate and 55 parts of alcohol solution (the alcohol solution includes 40 parts of anhydrous ethanol and 15 parts of deionized water), add 1.0 part of hydrochloric acid to adjust the pH to 4, and react at 60°C for 1 hour to obtain silica sol. 0.6 parts of ammonia were added to the silica sol to adjust the pH to 9 to obtain a precursor solution. The nonwoven fabric-ZIF-8 particle composite material was immersed in the precursor solution for 5 minutes, then removed and placed in 80 parts of methyltriethoxysilane solution (composed of methyltriethoxysilane and anhydrous ethanol in a molar ratio of 1:15) for aging modification at 50°C for 48 hours. After supercritical drying at 140°C and 1.2 MPa for 8 hours, an aerogel nonwoven fabric insulation layer with a thickness of 1.5 mm was obtained. The nonwoven fabric substrate was polypropylene needle-punched nonwoven fabric with a basis weight of 150 g / m² and a surface textured with micron-level concave and convex textures (depth 40 μm, diameter 3 mm).

[0052] Comparative Example 1 The difference between this comparative example and Example 3 is that the aerogel nonwoven insulation layer is replaced with an ordinary rock wool layer.

[0053] Comparative Example 2 The difference between this comparative example and Example 3 is that the aerogel nonwoven insulation layer is replaced with a regular glass wool layer.

[0054] Comparative Example 3 The difference between this comparative example and Example 3 is that the aerogel nonwoven insulation layer is replaced with a foam glass layer.

[0055] Performance testing The thermal conductivity was tested using the method specified in GB / T 10294-2008 "Determination of Steady-State Thermal Resistance and Related Properties of Thermal Insulation Materials - Protective Hot Plate Method"; the performance of each embodiment and comparative example after testing is shown in Table 1.

[0056] Table 1 Performance Test Results

[0057] Compared with Comparative Examples 1-3, the thermal conductivity of the multi-layer rigid-flexible composite waterproof and anti-corrosion insulation board prepared in Examples 1-11 was significantly reduced, indicating that the multi-layer rigid-flexible composite waterproof and anti-corrosion insulation board of the present invention has a better insulation effect than traditional insulation boards. Furthermore, the insulation performance of the multi-layer rigid-flexible composite waterproof and anti-corrosion insulation board is gradually improved as the thickness of the aerogel nonwoven insulation layer increases and the functional materials of the aerogel nonwoven insulation layer are changed.

[0058] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A multi-layer rigid-flexible composite waterproof, anti-corrosion, and heat-insulating board, characterized in that, From the outside to the inside, it includes a TPO weather-resistant waterproof layer, adhesive layer I, a metal steel plate layer, adhesive layer II, an aerogel non-woven insulation layer, and a coated steel plate protective layer.

2. The multi-layer rigid-flexible composite waterproof, anti-corrosion, and heat-insulating board according to claim 1, characterized in that, The thickness of the TPO weather-resistant waterproof layer is 0.5~2.0mm; the thickness of the adhesive layer I is 0.01~0.1mm; the thickness of the metal steel plate layer is 0.5~1.5mm; the thickness of the adhesive layer II is 0.05~0.3mm; the thickness of the aerogel nonwoven insulation layer is 1~3mm; and the thickness of the coated steel plate protective layer is 0.05~0.3mm.

3. The multi-layer rigid-flexible composite waterproof, anti-corrosion, and heat-insulating board according to claim 1, characterized in that, The TPO weather-resistant waterproof layer comprises the following components in parts by weight: 40-60 parts of ethylene-propylene copolymer, 15-25 parts of polypropylene, 5-10 parts of styrene-isoprene copolymer, 10-20 parts of filler, 0.5-1.2 parts of antioxidant, 0.6-1.2 parts of light stabilizer, 0.3-0.8 parts of ultraviolet absorber, 5-10 parts of maleic anhydride-grafted polyolefin, and 1-3 parts of processing aid.

4. The multi-layer rigid-flexible composite waterproof, anti-corrosion, and heat-insulating board according to claim 1, characterized in that, Each of the adhesive layers I and II independently comprises the following components in parts by weight: 50-70 parts of maleic anhydride-grafted polyolefin, 4-8 parts of maleic anhydride-grafted polypropylene wax, 5-10 parts of styrene-ethylene-butene-styrene block copolymer, 12-18 parts of epoxy resin, 5-10 parts of hydrogenated petroleum resin, 1-3 parts of silane coupling agent, and 0.5-1.5 parts of antioxidant.

5. The multi-layer rigid-flexible composite waterproof, anti-corrosion, and heat-insulating board according to claim 1, characterized in that, The metal steel plate layer is a hot-dip aluminum-magnesium-zinc coated steel plate; The coating adhesion of the hot-dip aluminum-magnesium-zinc steel sheet is 80~120g / m². The hot-dip aluminum-magnesium-zinc steel sheet is also phosphated, and the surface contains a phosphate film with a thickness of 5~10μm.

6. The multi-layer rigid-flexible composite waterproof, anti-corrosion, and heat-insulating board according to claim 1, characterized in that, The coated steel plate protective layer consists of a metal steel plate base layer and a coating layer on the surface of the metal steel plate base layer; The base material of the metal steel plate is chrome-plated cold-rolled steel plate; The total thickness of the chrome-plated cold-rolled steel sheet is 0.05~0.3mm, and the chrome layer thickness is 50~100nm; The coating layer is made of PET film.

7. The multi-layer rigid-flexible composite waterproof, anti-corrosion, and heat-insulating board according to claim 1, characterized in that, The aerogel nonwoven insulation layer includes a nonwoven substrate and functional materials and aerogel II sequentially attached to the nonwoven substrate. The functional material is ZIF-8 particles or aerogel I; Aerogel I is a xanthan gum-ZIF-8 composite aerogel; The aerogel II comprises the following raw materials in parts by weight: 20-30 parts of tetraethyl orthosilicate, 40-55 parts of alcohol solution, 0.5-1.0 parts of hydrochloric acid, 0.3-0.6 parts of ammonia, and 60-80 parts of methyltriethoxysilane solution.

8. A multi-layer rigid-flexible composite waterproof, anti-corrosion, and heat-insulating board according to claim 7, characterized in that, The method for preparing the aerogel nonwoven insulation layer includes the following steps: By laminating ZIF-8 particles or aerogel I onto nonwoven fabric, a nonwoven composite material is obtained. Tetraethyl orthosilicate and an alcohol solution are mixed, and hydrochloric acid is added to adjust the pH to 3-4. The reaction is carried out to obtain silica sol. Ammonia water was added to the silica sol to adjust the pH to 7-9 to obtain a precursor solution. The nonwoven composite material was immersed in the precursor solution, taken out, aged and modified in methyltriethoxysilane solution, and dried to obtain an aerogel nonwoven insulation layer.

9. A multi-layer rigid-flexible composite waterproof, anti-corrosion, and heat-insulating board according to claim 7, characterized in that, The nonwoven fabric substrate is polypropylene needle-punched nonwoven fabric with a micron-level textured surface. The depth of the micron-level textured surface is 20~35μm, and the diameter is 1~3mm.

10. A method for preparing a multi-layer rigid-flexible composite waterproof, anti-corrosion, and thermal insulation board, used to prepare the multi-layer rigid-flexible composite waterproof, anti-corrosion, and thermal insulation board according to any one of claims 1 to 9, characterized in that, Includes the following steps: Adhesive coating I is applied to the lower surface of the TPO weather-resistant waterproof layer to form adhesive layer I. A metal steel plate layer is then bonded to the lower surface of adhesive layer I. Adhesive coating II is applied to the lower surface of the metal steel plate layer to form adhesive layer II. An aerogel nonwoven insulation layer is then bonded to the lower surface of adhesive layer II. A film-coated steel plate protective layer is then bonded to the lower surface of the aerogel nonwoven insulation layer. The layers are then hot-pressed together to obtain a multi-layer rigid-flexible composite waterproof and corrosion-resistant insulation board.

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