Waterproof coiled material with good anti-aging performance and production method thereof

Abstract

The invention relates to a waterproof roll with good anti-aging performance and a production method thereof, and discloses a waterproof roll with good anti-aging performance and a production method thereof. The waterproof roll is prepared by optimizing materials of a modified base material layer, a reinforced fiber layer and a functional surface layer and structurally arranging a multi-layer composite sealing structure and a glass fiber reinforced strip; the anti-aging performance, the waterproof performance and the structural stability of the waterproof coiled material are effectively improved. The composite material is characterized by comprising a modified base material layer, a reinforced fiber layer and a functional surface layer, the reinforced fiber layer is arranged between the modified base material layer and the functional surface layer; the modified base material layer is prepared from the following components in parts by weight: 60 to 70 parts of SBS-APP composite modified asphalt, 10 to 15 parts of a nano composite anti-aging agent, 5 to 8 parts of a plasticizer, 10 to 15 parts of a filling agent and 2 to 4 parts of an antioxidant; the reinforced fiber layer comprises the following components in parts by weight: 70-80 parts of aramid fiber-polyester blend fiber, 5-10 parts of an anti-aging additive, 10-15 parts of a binder and 2-3 parts of a coupling agent, and the functional surface layer is composed of a modified polyurethane coating and nanoscale light stabilization particles dispersed in the modified polyurethane coating.

Description

Technical Field

[0001] This invention relates to a waterproof membrane with good anti-aging properties and its production method, belonging to the field of building waterproofing materials. In particular, it relates to a waterproof membrane and its production method that effectively improves the anti-aging properties, waterproofing performance and structural stability of the waterproof membrane by optimizing the materials of the modified substrate layer, the reinforcing fiber layer and the functional surface layer, and by setting a multi-layer composite sealing structure and glass fiber reinforcing strips in the structure. Background Technology

[0002] In construction engineering, waterproof membranes are crucial materials for protecting buildings from water damage, directly impacting their durability and safety. As buildings age, waterproof membranes are constantly exposed to the outdoors, enduring complex environmental factors such as UV radiation, high and low temperature cycles, rainwater erosion, and chemical corrosion. These factors accelerate the aging of the waterproof membrane, leading to waterproofing failure and subsequently causing leaks, structural damage, and a series of other problems. Currently, waterproof membranes typically employ a single modified bitumen layer or a simple composite structure, primarily composed of ordinary modified bitumen, a small amount of fillers, and additives. Single-modified bitumen waterproof membranes rely on the viscosity and flexibility of the modified bitumen to achieve their waterproofing function. However, due to the limited range of anti-aging agents, they cannot effectively resist the erosion of environmental factors such as UV radiation and high and low temperature cycles, resulting in a rapid decline in waterproofing performance and a shortened service life. Furthermore, structurally, the simple design lacks effective reinforcement, making the membrane prone to deformation and cracking under external stretching and compression, thus affecting its waterproofing effect. Announcement No. CN119820946A discloses a novel modified bitumen waterproof membrane with a long service life. It is made by mixing a polymer waterproof sheet with two layers of fabric reinforcement, with the polymer waterproof sheet as the core layer to form the substrate. The substrate is dried until it is completely dry. The dried substrate is then pre-impregnated with bitumen and covered with an anti-sticking isolation layer to obtain the waterproof membrane. It has excellent impermeability and waterproof durability. However, it adopts a single composite structure, which is relatively weak in resisting external tensile, compressive and base layer deformation, and is prone to deformation, cracking and other problems, affecting the waterproof effect. Summary of the Invention

[0003] To improve the above situation, the present invention provides a waterproof membrane with good anti-aging properties and its production method. This invention provides a waterproof membrane and its production method that effectively improves the anti-aging properties, waterproof performance and structural stability of the waterproof membrane by optimizing the materials of the modified substrate layer, the reinforcing fiber layer and the functional surface layer, and by setting a multi-layer composite sealing structure and glass fiber reinforcing strips in the structure.

[0004] The present invention provides a waterproof membrane with good anti-aging properties and its production method as follows: The waterproof membrane with good anti-aging properties of the present invention includes a modified substrate layer, a reinforcing fiber layer and a functional surface layer. The characteristic feature is that the reinforcing fiber layer is disposed between the modified substrate layer and the functional surface layer; The components and contents (parts by weight) of the modified substrate layer are as follows: SBS-APP composite modified bitumen: 60-70 parts, nano-composite anti-aging agent: 10-15 parts, plasticizer: 5-8 parts, filler: 10-15 parts, antioxidant: 2-4 parts. Preferably, the SBS-APP composite modified asphalt is made by compounding SBS modified asphalt and APP modified asphalt in a mass ratio of 3:2. Preferably, the nanocomposite anti-aging agent is composed of 4-6 parts of nano titanium dioxide, 4-5 parts of nano zinc oxide, and 2-4 parts of hindered amine light stabilizer; The components and contents (parts by weight) of the reinforcing fiber layer are as follows: aramid-polyester blend fiber: 70-80 parts, anti-aging additive: 5-10 parts, binder: 10-15 parts, coupling agent: 2-3 parts. Preferably, the aramid-polyester blend fiber is a mixture of polyester fiber and aramid fiber in a weight ratio of (5-7):(3-5); Preferably, the anti-aging additive uses nano-silica (3-5 parts) and ultraviolet absorber (2-5 parts). The functional surface layer consists of a modified polyurethane coating and nanoscale light-stabilizing particles dispersed within it. Preferably, the modified polyurethane coating is generated by reacting isocyanate monomers with polyol monomers, and nanoscale light-stabilizing particles are added during the reaction process; Preferably, the nanoscale light-stabilized particles are cerium dioxide or zirconium dioxide particles with a particle size in the range of 20-50 nm; Preferably, the thickness of the modified substrate layer is greater than the thickness of the reinforcing fiber layer, and the thickness of the reinforcing fiber layer is greater than the thickness of the functional surface layer. Furthermore, after the waterproof membrane is composite molded, a multi-layer composite sealing structure is set at the edge of the membrane. This structure includes an inner sealing layer, an intermediate reinforcing layer, and an outer protective layer. Furthermore, glass fiber reinforcing strips are arranged in a matrix between the reinforcing fiber layer (2) and the functional surface layer (1); This invention also provides a method for producing a waterproof membrane with good anti-aging properties, comprising: Step 1: Prepare the modified substrate layer: (1) Pour the melted SBS-APP composite modified asphalt into a mixing tank and stir at 150-170℃ for 10-15 minutes to form a uniformly mixed melt; The preparation process of the melted SBS-APP composite modified asphalt is as follows: weigh SBS modified asphalt and APP modified asphalt at a mass ratio of 3:2, mix them to make SBS-APP composite modified asphalt, place it in a heating container, and heat it to 160-180℃ to make it completely melted. (2) Add the dried nanocomposite anti-aging agent, plasticizer, filler and antioxidant to the above uniformly mixed melt in sequence, increase the stirring speed to 400-500 rpm, and continue stirring for 20-30 minutes to form a uniform modified substrate mixture; (3) The above modified substrate mixture is fed into an extrusion molding equipment and the modified substrate layer is obtained by melt extrusion molding process; Step 2: Prepare the reinforcing fiber layer: (1) Add nano silica and ultraviolet absorber to an appropriate amount of water and stir at 300-400 rpm for 15-20 minutes to prepare an anti-aging additive solution; (2) Add epoxy resin emulsion and silane coupling agent to the additive solution, and continue stirring for 10-15 minutes to obtain a mixture; (3) Place the dried aramid-polyester blended fiber into the impregnation tank, pour in the mixture and impregnate for 10-15 minutes, then squeeze it through the extrusion roller to remove the excess mixture; The preparation process of the dried aramid-polyester blended fiber is as follows: weigh polyester fiber and aramid fiber according to the weight ratio of (5-7): (3-5), mix them evenly to obtain aramid-polyester blended fiber, put them into an opening machine to open, and then put them into an 80-100℃ drying oven to dry for 2-3 hours. (4) The impregnated and extruded fiber layer is sent to a drying and curing equipment and dried and cured at 120-150℃ for 30-40 minutes to obtain the reinforcing fiber material; Step 3: Prepare the functional surface layer: (1) Mix nanoscale light-stabilized particles with an appropriate amount of dispersant and ethanol, and disperse them under high-speed stirring (1000-1500 rpm) for 30-40 minutes to prepare a nanoparticle dispersion; (2) Add polyol monomers to the reactor, heat to 80-90℃, slowly add isocyanate monomers while stirring, control the reaction temperature at 80-95℃, react for 2-3 hours to synthesize polyurethane prepolymer; (3) During the reaction of polyurethane prepolymer, nanoparticle dispersion is slowly added and the reaction is continued for 1-2 hours to obtain modified polyurethane coating raw material. (4) Transfer the modified polyurethane coating raw material to a mixing tank and stir it evenly at 50-60℃ to prepare a functional surface coating. Step 4: Prepare the waterproof membrane: (1) The reinforcing fiber material obtained in step 2 is evenly laid on the surface of the modified substrate layer obtained in step 1, and the reinforcing fiber material is embedded in the modified substrate layer by hot pressing process to form a reinforcing fiber layer. (2) The functional surface layer coating in step 3 is applied to the surface of the above-mentioned reinforcing fiber layer, and the functional surface layer is formed by curing process, and finally a waterproof membrane with good anti-aging performance is obtained. Beneficial effects

[0005] I. It has good anti-aging properties.

[0006] Second, it has good adaptability to high and low temperatures.

[0007] Third, it has a stable interlayer bonding structure. Attached Figure Description

[0008] Figure 1 This is a three-dimensional structural diagram of a waterproof membrane with good anti-aging properties according to the present invention. Figure 2 This is a three-dimensional structural diagram of Example 2 of the waterproof membrane with good anti-aging properties according to the present invention; Figure 3 This is a schematic diagram of the structure of a second embodiment of a waterproof membrane with good anti-aging properties according to the present invention; Figure 4 This is a three-dimensional structural diagram of Example 3 of a waterproof membrane with good anti-aging properties according to the present invention; Figure 5 This is a schematic diagram of the structure of Example 3 of the waterproof membrane with good anti-aging properties according to the present invention. Attached Figure

[0009] The components are: functional surface layer (1), reinforcing fiber layer (2), modified substrate layer (3), serrated adhesive strip (4), inner sealing layer (5), glass fiber mesh (6), pores (7), outer protective layer (8), and fiber reinforcing strip (9). Detailed Implementation Example 1

[0010] The present invention provides a waterproof membrane with good anti-aging properties and its production method as follows: The waterproof membrane with good anti-aging properties of the present invention includes a modified substrate layer (3), a reinforcing fiber layer (2) and a functional surface layer (1). The characteristic feature is that the reinforcing fiber layer (2) is disposed between the modified substrate layer (3) and the functional surface layer (1); The components and contents (parts by weight) of the modified substrate layer (3) are as follows: SBS-APP composite modified asphalt: 60-70 parts, nano composite anti-aging agent: 10-15 parts, plasticizer: 5-8 parts, filler: 10-15 parts, antioxidant: 2-4 parts; Preferably, the SBS-APP composite modified asphalt is made by compounding SBS modified asphalt and APP modified asphalt in a mass ratio of 3:2. Preferably, the nanocomposite anti-aging agent is composed of 4-6 parts of nano titanium dioxide, 4-5 parts of nano zinc oxide, and 2-4 parts of hindered amine light stabilizer; The components and contents (parts by weight) of the reinforcing fiber layer (2) are as follows: aramid-polyester blended fiber: 70-80 parts, anti-aging additive: 5-10 parts, binder: 10-15 parts, coupling agent: 2-3 parts. Preferably, the aramid-polyester blend fiber is a mixture of polyester fiber and aramid fiber in a weight ratio of (5-7):(3-5); Preferably, the anti-aging additive uses nano-silica (3-5 parts) and ultraviolet absorber (2-5 parts). The functional surface layer (1) is composed of a modified polyurethane coating and nanoscale light-stabilizing particles dispersed therein. Preferably, the modified polyurethane coating is generated by reacting isocyanate monomers with polyol monomers, and nanoscale light-stabilizing particles are added during the reaction process; Preferably, the nanoscale light-stabilized particles are cerium dioxide or zirconium dioxide particles with a particle size in the range of 20-50 nm; Preferably, the thickness of the modified substrate layer (3) is greater than the thickness of the reinforcing fiber layer (2), and the thickness of the reinforcing fiber layer (2) is greater than the thickness of the functional surface layer (1); This invention also provides a method for producing a waterproof membrane with good anti-aging properties, characterized in that it includes: Step 1: Preparation of modified substrate layer (3): (1) Pour the melted SBS-APP composite modified asphalt into a mixing tank and stir at 150-170℃ for 10-15 minutes to form a uniformly mixed melt; The preparation process of the melted SBS-APP composite modified asphalt is as follows: weigh SBS modified asphalt and APP modified asphalt at a mass ratio of 3:2, mix them to make SBS-APP composite modified asphalt, place it in a heating container, and heat it to 160-180℃ to make it completely melted. (2) Add the dried nanocomposite anti-aging agent, plasticizer, filler and antioxidant to the above uniformly mixed melt in sequence, increase the stirring speed to 400-500 rpm, and continue stirring for 20-30 minutes to form a uniform modified substrate mixture; (3) The above modified substrate mixture is fed into an extrusion molding equipment and the modified substrate layer (3) is obtained by melt extrusion molding process. Step 2: Preparation of the reinforcing fiber layer (2): (1) Add nano silica and ultraviolet absorber to an appropriate amount of water and stir at 300-400 rpm for 15-20 minutes to prepare an anti-aging additive solution; (2) Add epoxy resin emulsion and silane coupling agent to the additive solution, and continue stirring for 10-15 minutes to obtain a mixture; (3) Place the dried aramid-polyester blended fiber into the impregnation tank, pour in the mixture and impregnate for 10-15 minutes, then squeeze it through the extrusion roller to remove the excess mixture; The preparation process of the dried aramid-polyester blended fiber is as follows: weigh polyester fiber and aramid fiber according to the weight ratio of (5-7): (3-5), mix them evenly to obtain aramid-polyester blended fiber, put them into an opening machine to open, and then put them into an 80-100℃ drying oven to dry for 2-3 hours. (4) The impregnated and extruded fiber layer is sent to a drying and curing equipment and dried and cured at 120-150℃ for 30-40 minutes to obtain the reinforcing fiber material; Step 3: Prepare the functional surface layer: (1) Mix nanoscale light-stabilized particles with an appropriate amount of dispersant and ethanol, and disperse them under high-speed stirring (1000-1500 rpm) for 30-40 minutes to prepare a nanoparticle dispersion; (2) Add polyol monomers to the reactor, heat to 80-90℃, slowly add isocyanate monomers while stirring, control the reaction temperature at 80-95℃, react for 2-3 hours to synthesize polyurethane prepolymer; (3) During the reaction of polyurethane prepolymer, nanoparticle dispersion is slowly added and the reaction is continued for 1-2 hours to obtain modified polyurethane coating raw material. (4) Transfer the modified polyurethane coating raw material to a mixing tank and stir it evenly at 50-60℃ to make a functional surface layer (1) coating. Step 4: Prepare the waterproof membrane: (1) The reinforcing fiber material obtained in step 2 is evenly laid on the surface of the modified substrate layer (3) obtained in step 1, and the reinforcing fiber material is embedded in the modified substrate layer (3) by hot pressing process to form the reinforcing fiber layer (2). (2) The functional surface layer (1) coating in step 3 is applied to the surface of the above-mentioned reinforcing fiber layer (2), and the functional surface layer (1) is formed by curing process, and finally a waterproof membrane with good anti-aging performance is obtained. Example 2

[0011] The difference between this embodiment and embodiment 1 is that after the waterproof membrane is composite molded, a multi-layer composite sealing structure is set at the edge of the membrane. The structure includes an inner sealing layer (5), a fiberglass mesh (6) and an outer protective layer (8). When the inner sealing layer (5) is applied, a serrated adhesive strip (4) is formed on the edge surface of the membrane through a serrated adhesive coating mold. The fiberglass mesh (6) serves as the middle layer. It is immersed in a polyurethane resin solution and fully impregnated. It is then taken out and laid flat on the surface of the inner sealing layer (5) at the edge of the membrane. It is then rolled by a roller pressing device so that the polyurethane resin fully fills the pores (7) of the mesh and is tightly bonded to the inner sealing layer (5). The outer protective layer (8) is covered on the surface of the middle layer and heated so that it melts and bonds with the polyurethane resin of the middle layer. At the same time, the edges of the outer protective layers of adjacent waterproof membranes are welded together to form a continuous sealing and protective layer.

[0012] The serrated structure can increase the contact area between the inner sealing layer (5) and the edge of the roll material. Under pressure, the serrated adhesive strip (4) can be better embedded in the surface of the roll material, enhance the adhesion, and form a sealing path to effectively block the penetration of moisture and air. The fiberglass mesh (6) can effectively enhance the tensile strength and tear resistance of the sealing structure and prevent the sealing layer from cracking due to external forces during use. The outer protective layer (8) can protect the inner sealing layer (5) and the intermediate layer, prevent their performance from declining due to external erosion, and thus enhance the anti-aging properties of the entire waterproof roll material. Example 3

[0013] The difference between this embodiment and embodiment 1 is that: between the reinforcing fiber layer (2) and the functional surface layer (1), fiber reinforcing strips (9) are arranged in a matrix to form a grid-like reinforcing structure, so that each fiber reinforcing strip (9) is evenly distributed between the two layers; the grid-like fiber reinforcing strips (9) can evenly disperse stress, improve the tensile strength and tear resistance of the waterproof membrane, and the grid structure can divide the functional surface layer (1) into multiple small areas. Even if the functional surface layer in a certain area is aged and damaged, it can prevent the expansion of the aged area to a certain extent, limit the further damage of external environmental factors to the internal structure, and thus extend the service life of the waterproof membrane.

[0014] The SBS-APP composite modified bitumen is designed by combining SBS modified bitumen and APP modified bitumen in a mass ratio of 3:2. It can achieve a balanced optimization of high and low temperature performance, allowing the waterproof membrane to maintain good flexibility in cold conditions and maintain a stable shape in hot conditions, thus enhancing its adaptability to different climatic conditions. The nanocomposite anti-aging agent is designed to consist of 4-6 parts of nano titanium dioxide, 4-5 parts of nano zinc oxide, and 2-4 parts of hindered amine light stabilizer. Nano titanium dioxide has a strong absorption and scattering effect on ultraviolet rays with a wavelength of 280-350nm, nano zinc oxide has a better absorption effect on ultraviolet rays with a wavelength of 320-400nm, and can cover a wider range of ultraviolet wavelengths. The hindered amine light stabilizer can capture free radicals generated after ultraviolet irradiation. The three work synergistically to effectively block the damage of ultraviolet rays to waterproof membranes and prevent the modified substrate layer from degrading due to ultraviolet aging. The aramid-polyester blended fiber is designed with a weight ratio of (5-7):(3-5) of polyester fiber and aramid fiber. The polyester fiber provides basic mechanical support for the waterproof membrane, ensuring that the membrane is not easily deformed during normal use. The aramid fiber has high strength, fatigue resistance and high temperature resistance. The weight ratio of (5-7):(3-5) realizes the complementary advantages of the two, ensuring that the waterproof membrane has high strength and high toughness and can withstand large tensile, tearing and puncture forces while reasonably controlling costs. The anti-aging additive is designed with nano-silica and ultraviolet absorbers. The nano-sized particles of nano-silica can effectively scatter and reflect ultraviolet rays, reducing the direct exposure of ultraviolet rays to the waterproof membrane. The ultraviolet absorber can absorb the energy of ultraviolet rays. The two are used together to form a synergistic "reflection-absorption" mechanism, which protects against ultraviolet rays of different wavelengths. It is more effective than a single component in blocking the degradation, discoloration and other aging phenomena of polymer materials caused by ultraviolet rays, and can improve the weather resistance of the waterproof membrane. The modified polyurethane coating is generated by the reaction of isocyanate monomers and polyol monomers. The design of adding nano-scale light-stabilizing particles during the reaction process can effectively block ultraviolet rays from penetrating the coating and reduce the damage of ultraviolet rays to the internal structure of the waterproof membrane. The addition of light-stabilizing particles during the reaction process can make them evenly dispersed inside the polyurethane coating, avoid particle agglomeration, give full play to the light-stabilizing effect, delay the aging rate of the coating and the entire waterproof membrane, and extend the service life. The nanoscale light-stabilized particles are cerium dioxide or zirconium dioxide particles with a particle size in the range of 20-50nm. They can fully contact ultraviolet rays, further improving the absorption and scattering efficiency of ultraviolet rays, thereby preventing the polymer material of the waterproof membrane from degrading and aging due to ultraviolet radiation, and providing long-lasting and efficient anti-ultraviolet aging protection. The modified substrate layer (3) is thicker than the reinforcing fiber layer (2), and the reinforcing fiber layer (2) is thicker than the functional surface layer (1). The larger thickness of the modified substrate layer (3) ensures that the core functions of waterproofing and anti-aging are fully utilized, effectively blocking moisture and resisting the erosion of environmental factors such as ultraviolet rays and high and low temperatures, providing a durable and stable protective foundation for the entire waterproofing system. The moderate thickness of the reinforcing fiber layer (2) enhances the overall structural stability of the roll material, while not excessively affecting the flexibility and workability of the roll material, achieving a balance between performance and workability. The minimum thickness of the functional surface layer (1) can form a thin and effective protective barrier on the surface of the roll material.

[0015] The goal is to effectively improve the anti-aging performance, waterproof performance, and structural stability of waterproof membranes by optimizing the material formulation of the modified substrate layer, reinforcing fiber layer, and functional surface layer, as well as by setting up a multi-layer composite sealing structure and glass fiber reinforcing strips in the structure.

[0016] It should be noted that, unless otherwise explicitly specified and limited, the terms "placed," "connected," and "linked" should be interpreted broadly. For example, they can refer to fixed connections such as folded edges, rivets, pins, adhesives, and welds; detachable connections such as threaded connections, snap-fit ​​connections, and hinges; integral connections; electrical connections; direct connections; or indirect connections via an intermediate medium; or internal connections between two components. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances.

[0017] It should be further noted that, in order to keep the description simple and clear, the above specific embodiments only describe the differences between them and other embodiments. However, those skilled in the art should know that the above specific embodiments are also independent technical solutions.

Claims

1. A waterproof membrane with good anti-aging properties, comprising a modified substrate layer, a reinforcing fiber layer, and a functional surface layer; characterized in that: The reinforcing fiber layer is disposed between the modified substrate layer and the functional surface layer; the components and contents (parts by weight) of the modified substrate layer are as follows: SBS-APP composite modified bitumen: 60-70 parts, nano-composite anti-aging agent: 10-15 parts, plasticizer: 5-8 parts, filler: 10-15 parts, antioxidant: 2-4 parts. The components and contents (parts by weight) of the reinforcing fiber layer are as follows: aramid-polyester blended fiber: 70-80 parts, anti-aging additive: 5-10 parts, binder: 10-15 parts, coupling agent: 2-3 parts. The functional surface layer is composed of a modified polyurethane coating and nanoscale light-stabilizing particles dispersed within it.

2. The waterproof membrane with good anti-aging properties according to claim 1, characterized in that... After the waterproof membrane is composite-molded, a multi-layer composite sealing structure is set at the edge of the membrane. This structure includes an inner sealing layer, a fiberglass mesh, and an outer protective layer. During the application of the inner sealing layer, a serrated adhesive strip is formed on the surface of the membrane edge using a serrated adhesive coating mold. The fiberglass mesh serves as the intermediate layer, is immersed in a polyurethane resin solution, and after being fully impregnated, it is taken out and laid flat on the surface of the inner sealing layer at the edge of the membrane. It is then rolled by a roller pressing device to ensure that the polyurethane resin fully fills the pores of the mesh and bonds tightly to the inner sealing layer. The outer protective layer is then placed on the surface of the intermediate layer and heated to melt and bond with the polyurethane resin of the intermediate layer. At the same time, the edges of adjacent outer protective layers of the waterproof membrane are welded together to form a continuous sealing and protective layer.

3. The waterproof membrane with good anti-aging properties according to claim 1, characterized in that... Between the reinforcing fiber layer and the functional surface layer, fiber reinforcement strips are arranged in a matrix to form a grid-like reinforcement structure, so that each fiber reinforcement strip is evenly distributed between the two layers. The grid-like fiber reinforcement strips can evenly distribute stress, improve the tensile strength and tear resistance of the waterproof membrane, and the grid structure can divide the functional surface layer into multiple small areas. Even if the functional surface layer in a certain area is aged and damaged, it can prevent the expansion of the aged area to a certain extent, limit the further damage of external environmental factors to the internal structure, and thus extend the service life of the waterproof membrane.

4. The waterproof membrane with good anti-aging properties according to claim 1, characterized in that... The SBS-APP composite modified asphalt is made by compounding SBS modified asphalt and APP modified asphalt in a mass ratio of 3:2; the nano-composite anti-aging agent is composed of 4-6 parts of nano titanium dioxide, 4-5 parts of nano zinc oxide, and 2-4 parts of hindered amine light stabilizer.

5. A waterproof membrane with good anti-aging properties according to claim 1, characterized in that... The aramid-polyester blend fiber is a mixture of polyester fiber and aramid fiber in a weight ratio of (5-7):(3-5).

6. The waterproof membrane with good anti-aging properties according to claim 1, characterized in that... The anti-aging additive uses nano-silica (3-5 parts) and ultraviolet absorber (2-5 parts).

7. The waterproof membrane with good anti-aging properties according to claim 1, characterized in that... The modified polyurethane coating is generated by reacting isocyanate monomers with polyol monomers, and nanoscale light-stabilizing particles are added during the reaction process.

8. A waterproof membrane with good anti-aging properties according to claim 1, characterized in that... The nanoscale light-stabilized particles are cerium dioxide or zirconium dioxide particles with a particle size in the range of 20-50 nm; the thickness of the modified substrate layer is greater than the thickness of the reinforcing fiber layer, and the thickness of the reinforcing fiber layer is greater than the thickness of the functional surface layer.

9. A waterproof membrane with good anti-aging properties according to claim 1, characterized in that... The method for producing a waterproof membrane with good anti-aging properties includes: Step 1: Prepare the modified substrate layer: (1) Pour the melted SBS-APP composite modified asphalt into a mixing tank and stir at 150-170℃ for 10-15 minutes to form a uniformly mixed melt; (2) Add the dried nanocomposite anti-aging agent, plasticizer, filler and antioxidant to the above uniformly mixed melt in sequence, increase the stirring speed to 400-500 rpm, and continue stirring for 20-30 minutes to form a uniform modified substrate mixture; (3) The above modified substrate mixture is fed into an extrusion molding equipment and the modified substrate layer is obtained by melt extrusion molding process; Step 2: Prepare the reinforcing fiber layer: (1) Add nano silica and ultraviolet absorber to an appropriate amount of water and stir at 300-400 rpm for 15-20 minutes to prepare an anti-aging additive solution; (2) Add epoxy resin emulsion and silane coupling agent to the additive solution, and continue stirring for 10-15 minutes to obtain a mixture; (3) Place the dried aramid-polyester blended fiber into the impregnation tank, pour in the mixture and impregnate for 10-15 minutes, then squeeze it through the extrusion roller to remove the excess mixture; (4) The impregnated and extruded fiber layer is sent to a drying and curing equipment and dried and cured at 120-150℃ for 30-40 minutes to obtain the reinforcing fiber material; Step 3: Prepare the functional surface layer: (1) Mix nanoscale light-stabilized particles with an appropriate amount of dispersant and ethanol, and disperse them under high-speed stirring (1000-1500 rpm) for 30-40 minutes to prepare a nanoparticle dispersion; (2) Add polyol monomers to the reactor, heat to 80-90℃, slowly add isocyanate monomers while stirring, control the reaction temperature at 80-95℃, react for 2-3 hours to synthesize polyurethane prepolymer; (3) During the reaction of polyurethane prepolymer, nanoparticle dispersion is slowly added and the reaction is continued for 1-2 hours to obtain modified polyurethane coating raw material. (4) Transfer the modified polyurethane coating raw material to a mixing tank and stir it evenly at 50-60℃ to prepare a functional surface coating. Step 4: Prepare the waterproof membrane: (1) The reinforcing fiber material obtained in step 2 is evenly laid on the surface of the modified substrate layer obtained in step 1, and the reinforcing fiber material is embedded in the modified substrate layer by hot pressing process to form a reinforcing fiber layer. (2) The functional surface layer coating in step 3 is applied to the surface of the above-mentioned reinforcing fiber layer, and the functional surface layer is formed by curing process, and finally a waterproof membrane with good anti-aging performance is obtained.

10. A waterproof membrane with good anti-aging properties according to claim 9, characterized in that... The preparation process of the melted SBS-APP composite modified asphalt is as follows: weigh SBS modified asphalt and APP modified asphalt at a mass ratio of 3:2, mix them to form SBS-APP composite modified asphalt, place it in a heating container, and heat it to 160-180℃ to completely melt it; the preparation process of the dried aramid-polyester blended fiber is as follows: weigh polyester fiber and aramid fiber at a weight ratio of (5-7):(3-5), mix them evenly to obtain aramid-polyester blended fiber, put it into an opening machine to open it, and then put it in an 80-100℃ drying oven to dry for 2-3 hours.

Images