Extruded two-way prefabricated three-ply base-bite lap joint waterproofing membrane

Abstract

The application relates to the technical field of building roof waterproofing, and discloses an exposed double-layer prefabricated three-ply base interlocking lap waterproofing membrane, which comprises, from top to bottom, a facing layer, a weather-resistant self-adhesive asphalt layer, a first ply base layer, a first intermediate reinforced asphalt layer, a second ply base layer, a second intermediate reinforced asphalt layer, a third ply base layer, a bottom self-adhesive asphalt layer and a first isolation film; a lap joint is arranged at the first intermediate reinforced asphalt layer and the second intermediate reinforced asphalt layer; a second isolation film is arranged on the two sides of a mineral particle protective layer; a third isolation film is arranged on the upper surface of the lap joint; and a fourth isolation film is arranged on the lower surface of the lap joint; the raw materials of the first intermediate reinforced asphalt layer and the second intermediate reinforced asphalt layer comprise random polypropylene, asphalt and modified talcum powder, and the modified talcum powder comprises epoxy silane modified talcum powder and 4,4'-diamino diphenyl methane modified talcum powder; and the above technical scheme solves the problem of low mechanical strength of the exposed waterproofing membrane.

Description

Technical Field

[0001] This invention relates to the field of building roof waterproofing technology, specifically to a waterproof membrane suitable for exposed roofs such as flat roofs and pitched roofs, which has a surface containing mineral granules, is reinforced with a three-layer base, and has an interlocking structure. Background Technology

[0002] Waterproof membranes are flexible waterproof materials that can be rolled into rolls and are widely used for waterproofing roofs, basements, and special structures. Based on their main waterproofing components, waterproof membranes can be classified into bitumen waterproof membranes, polymer-modified bitumen waterproof membranes, and polymer waterproof membranes. Among these, polymer-modified bitumen waterproof membranes possess superior properties such as non-flowing at high temperatures, non-brittleness at low temperatures, high tensile strength, and high elongation, making them more widely used.

[0003] Exposed waterproof membranes are high-performance waterproof materials that are directly exposed to the natural environment, suitable for exposed applications such as flat roofs and pitched roofs. Due to the specific nature of these applications, exposed waterproof membranes need to possess sufficient mechanical strength to prevent damage from external forces. Therefore, the mechanical strength of traditional exposed waterproof membranes needs further improvement. Summary of the Invention

[0004] This invention proposes an exposed double-layer prefabricated three-layer interlocking waterproof membrane, which solves the problem of low mechanical strength of exposed waterproof membranes in related technologies.

[0005] The technical solution of the present invention is as follows:

[0006] An exposed double-layer prefabricated three-layer interlocking waterproof membrane comprises, from top to bottom, a topcoat layer, a weather-resistant self-adhesive asphalt layer, a first base layer, a first intermediate reinforcing asphalt layer, a second base layer, a second intermediate reinforcing asphalt layer, a third base layer, a bottom self-adhesive asphalt layer, and a first release membrane. The topcoat layer is composed of a second release membrane and a mineral granular protective layer joined together. An overlap is provided at the first and second intermediate reinforcing asphalt layers, and one end of the second base layer extends into the overlap. The second release membrane and the overlap are located on opposite sides of the mineral granular protective layer. A third release membrane is provided on the upper surface of the overlap, and a fourth release membrane is provided on the lower surface of the overlap.

[0007] The raw materials for the first intermediate reinforced asphalt layer and the second intermediate reinforced asphalt layer each independently include the following components: atactic polypropylene, asphalt, and modified talc powder. The modified talc powder includes first modified talc powder and second modified talc powder. The first modified talc powder is epoxy silane modified talc powder, and the second modified talc powder is 4,4'-diaminodiphenylmethane modified talc powder.

[0008] In this invention, the exposed double-layer prefabricated three-layer interlocking waterproof membrane is a multi-layer composite structure and is provided with a waterproof structural mother opening. It can form an interlocking overlap structure with the end of the adjacent waterproof membrane away from the waterproof structural mother opening, thereby greatly improving the joint quality between waterproof layers and significantly improving the waterproof performance of the exposed double-layer prefabricated three-layer interlocking waterproof membrane.

[0009] As a further technical solution, the length of one end of the second base layer extending into the overlapping interface is 1~3cm.

[0010] As a further technical solution, the length of the joint is 8~12cm.

[0011] As a further technical solution, the raw materials of the weather-resistant self-adhesive asphalt layer include the following components: atactic polypropylene, asphalt, and processing aids.

[0012] As a further technical solution, the mass ratio of the atactic polypropylene, the asphalt, and the processing aid is 8:50:7.8~8.5.

[0013] As a further technical solution, the processing aids include antioxidants, ultraviolet absorbers, and thickeners in a mass ratio of 0.5~0.9:0.3~0.6:7.

[0014] As a further technical solution, the raw materials of the mineral granule protective layer include the following components: mineral granules, styrene-butadiene-styrene block copolymer, styrene-butadiene rubber, asphalt, and tackifier.

[0015] As a further technical solution, the mass ratio of the styrene-butadiene-styrene block copolymer, styrene-butadiene rubber, asphalt and tackifier is 10:4:50:5~8.

[0016] As a further technical solution, the mineral granules include one or more of shale, quartz sand, mullite, and basalt.

[0017] In the exposed double-layer prefabricated three-layer interlocking waterproof membrane of the present invention, the mineral granule protective layer is bonded to the weather-resistant self-adhesive asphalt layer through a "hot-pressing" process. The mineral granules on the upper surface act as reflective and heat-insulating agents, preventing heat from being transferred to the lower layers and providing the waterproof membrane with good heat resistance.

[0018] As a further technical solution, the first substrate and the third substrate each independently include one of polyester fiber substrate, glass fiber substrate, glass fiber reinforced polyester substrate, polyethylene polypropylene substrate, PE film-based substrate, and PET film-based substrate.

[0019] As a further technical solution, the second base layer is a polymer film base, such as one of PP film, PE film, PVC film, PI film, TPU film, PC film, TPO film, EPDM film, TPE film, TPEE film, PEEK film, PET film, PEN film, CNF film, and PHA film.

[0020] As a further technical solution, the first, second, third, and fourth separators each independently include one of the following: PP film, PE film, PVC film, PI film, TPU film, PC film, TPO film, EPDM film, TPE film, TPEE film, PEEK film, PET film, PEN film, CNF film, and PHA film.

[0021] As a further technical solution, the raw materials of the bottom self-adhesive asphalt layer include the following components: butyl rubber, asphalt, SIS elastomer (styrene-isoprene-styrene block copolymer) and tackifier.

[0022] As a further technical solution, the mass ratio of butyl rubber, asphalt, SIS elastomer and tackifier is 17:55:10:10~16.

[0023] As a further technical solution, in the first intermediate reinforcing asphalt layer and / or the second intermediate reinforcing asphalt layer, the mass ratio of the atactic polypropylene, the asphalt, and the modified talc is 13:55:5~10.

[0024] As a further technical solution, the mass ratio of the first modified talc powder to the second modified talc powder is 3~4:1.

[0025] As a further technical solution, the modified talc powder also includes a third modified talc powder, which is a vinylsilane modified talc powder.

[0026] In this invention, vinylsilane-modified talc powder is further added, which further improves the mechanical strength of the exposed double-layer prefabricated three-layer interlocking waterproof membrane. The reason is that asphalt contains saturated components, aromatic components, resins, and asphaltenes; the main chemical structures of the saturated components are alkanes and cycloalkanes; the main chemical structures of the aromatic components are aromatic hydrocarbons and S-derived compounds; the resins are highly polar, with a main polycyclic structure containing S, O, and N derivatives; and the main chemical structure of the asphaltenes is a condensed ring structure containing S, O, and N derivatives. By using vinylsilane-modified talc, epoxysilane-modified talc, and 4,4'-diaminodiphenylmethane-modified talc in combination, on the one hand, epoxysilane-modified talc and 4,4'-diaminodiphenylmethane-modified talc form hydroxyl groups after reaction, which have good compatibility with the polar part of asphalt; on the other hand, vinylsilane-modified talc has good compatibility with the non-polar part of asphalt; at the same time, the hydroxyl groups can also form hydrogen bonds with the vinyl groups in vinylsilane-modified talc. This achieves the effect of improving the mechanical strength of exposed double-layer prefabricated three-layer interlocking waterproof membrane.

[0027] As a further technical solution, the mass ratio of the first modified talc powder and the second modified talc powder to the third modified talc powder is 2:3~4:1, preferably 3:2.

[0028] In this invention, the mass ratio of the first modified talc powder and the second modified talc powder to the third modified talc powder is further limited to 3:2, which further improves the mechanical strength of the exposed double-layer prefabricated three-layer interlocking waterproof membrane.

[0029] As a further technical solution, the raw materials for the 4,4'-diaminodiphenylmethane modified talc powder include 4,4'-diaminodiphenylmethane and talc powder in a mass ratio of 1~5:100.

[0030] As a further technical solution, the preparation method of the 4,4'-diaminodiphenylmethane modified talc powder includes the following steps: ultrasonically dispersing talc powder in methanol, adding 4,4'-diaminodiphenylmethane for modification, drying, and obtaining 4,4'-diaminodiphenylmethane modified talc powder.

[0031] As a further technical solution, the modification temperature is 35~45℃, the modification time is 1~2h; stirring is carried out during modification, and the stirring speed is 350~500rpm.

[0032] As a further technical solution, the raw materials for the epoxy silane modified talc powder include epoxy silane and talc powder in a mass ratio of 1.5~3.5:100;

[0033] The preparation method of the epoxy-silane modified talc powder includes the following steps:

[0034] A1. Disperse talc powder in water to obtain a slurry;

[0035] A2. After mixing epoxy silane, ethanol and water, a hydrolysate is obtained;

[0036] A3. The hydrolysate is added to the slurry for modification, filtered, and dried to obtain epoxy silane modified talc powder.

[0037] As a further technical solution, the raw materials for the vinylsilane-modified talc powder include vinylsilane and talc powder in a mass ratio of 1.5~3.5:100;

[0038] The preparation method of the vinylsilane-modified talc powder includes the following steps:

[0039] B1. Disperse talc powder in water to obtain a slurry;

[0040] B2. After mixing vinylsilane, ethanol and water, a hydrolysate is obtained;

[0041] B3. The hydrolysate is added to the slurry for modification, filtered, and dried to obtain vinylsilane-modified talc powder.

[0042] The working principle and beneficial effects of this invention are as follows:

[0043] In this invention, epoxy-silane-modified talc and 4,4'-diaminodiphenylmethane-modified talc are used in combination to improve the mechanical strength of exposed double-layer prefabricated triple-layer interlocking waterproof membrane. This is because epoxy-silane modification improves the dispersibility of the talc, and when combined with 4,4'-diaminodiphenylmethane-modified talc, the epoxy groups on the surface of the epoxy-silane-modified talc react with the amino groups in the 4,4'-diaminodiphenylmethane-modified talc to form new chemical bonds, thereby significantly enhancing the mechanical strength of the waterproof membrane. Attached Figure Description

[0044] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0045] Figure 1 This is a schematic diagram of the exposed double-layer prefabricated three-layer interlocking waterproof membrane according to Embodiment 2 of the present invention;

[0046] In the diagram: 1. Second release membrane, 2. Mineral aggregate protective layer, 3. Weather-resistant self-adhesive asphalt layer, 4. First base layer, 5. First intermediate reinforced asphalt layer, 6. Second base layer, 7. Second intermediate reinforced asphalt layer, 8. Third base layer, 9. Bottom self-adhesive asphalt layer, 10. First release membrane, 11. Third release membrane, 12. Fourth release membrane. Detailed Implementation

[0047] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0048] In the following embodiments and comparative examples:

[0049] Asphalt: 90# asphalt;

[0050] Talc powder: 5000 mesh;

[0051] Random polypropylene: APP MZ, Chiba, Japan;

[0052] Butyl rubber: Yanshan Petrochemical Butyl Rubber IIR1751;

[0053] SIS elastomer: Kraton SIS D1163 (USA);

[0054] Styrene-butadiene rubber: Sinopec SBR1712;

[0055] Styrene-butadiene-styrene block copolymer: SBS, Gulei Petrochemical 4412;

[0056] Tackifier: Petroleum resin C9;

[0057] First pregnancy base layer: 60g / m 2 Polyester fiber fabric;

[0058] Second base layer: 0.15mm thick polyethylene terephthalate film;

[0059] First, second, third, and fourth release films: PE films with a thickness of 0.05 mm;

[0060] Third pregnancy base layer: 60g / m 2 Polyester fiber fabric.

[0061] Example 1

[0062] An exposed double-layer prefabricated three-layer interlocking waterproof membrane comprises, from top to bottom, a topcoat layer, a 0.5mm thick weather-resistant self-adhesive bitumen layer, a first base layer, a 0.5mm thick first intermediate reinforcing bitumen layer, a second base layer, a 0.5mm thick second intermediate reinforcing bitumen layer, a third base layer, a 1mm thick bottom self-adhesive bitumen layer, and a first release membrane. The topcoat layer is composed of a second release membrane and a 1.5mm thick mineral granule protective layer. A 10cm long overlap is provided between the first and second intermediate reinforcing bitumen layers. One end of the second base layer extends into the overlap for 2cm. The second release membrane and the overlap are located on opposite sides of the mineral granule protective layer. A third release membrane is provided on the upper surface of the overlap, and a fourth release membrane is provided on the lower surface of the overlap.

[0063] The raw materials for the weather-resistant self-adhesive asphalt layer include the following components in parts by weight: 8 parts atactic polypropylene, 50 parts asphalt, 0.9 parts antioxidant 1010, 0.6 parts ultraviolet absorber UV-531, and 7 parts tackifier;

[0064] The raw materials for both the first and second intermediate reinforced asphalt layers include the following components by weight: 13 parts atactic polypropylene, 55 parts asphalt, and 5 parts modified talc. The modified talc includes epoxy silane modified talc and 4,4'-diaminodiphenylmethane modified talc in a weight ratio of 3:1.

[0065] The preparation method of epoxy-silane modified talc includes the following steps:

[0066] Talc powder and water were mixed to obtain a 15wt% slurry; KH-560, ethanol and water were mixed in a mass ratio of 1:10:1 to obtain a hydrolysate; the hydrolysate was added to the above slurry in a mass ratio of KH-560 to talc powder of 1.5:100, modified at 70℃ for 90 min, filtered and dried to obtain epoxy silane modified talc powder;

[0067] The preparation method of 4,4'-diaminodiphenylmethane modified talc includes the following steps:

[0068] Talc powder was ultrasonically dispersed in methanol (mass ratio of talc powder to methanol was 1:1.5). 4,4'-diaminodiphenylmethane was added at a mass ratio of 1:100 to 4,4'-diaminodiphenylmethane. The mixture was modified at 35°C and 500 rpm for 2 hours and then dried to obtain 4,4'-diaminodiphenylmethane modified talc powder.

[0069] The raw materials for the bottom self-adhesive asphalt layer include the following components in parts by weight: 17 parts butyl rubber, 55 parts asphalt, 10 parts SIS elastomer, and 16 parts tackifier.

[0070] The raw materials for the mineral granule protective layer include the following components in parts by weight: shale with a particle size of 2 mm, 10 parts of styrene-butadiene-styrene block copolymer, 4 parts of styrene-butadiene rubber, 50 parts of asphalt, and 8 parts of tackifier; the amount of shale added is based on the ability to spread evenly across the entire mineral granule protective layer.

[0071] Example 2

[0072] An exposed double-layer prefabricated triple-layer interlocking waterproof membrane, such as Figure 1 As shown, from top to bottom, it includes a surface layer, a 0.5mm thick weather-resistant self-adhesive asphalt layer, a first base layer, a 0.5mm thick first intermediate reinforcing asphalt layer, a second base layer, a 0.5mm thick second intermediate reinforcing asphalt layer, a third base layer, a 1mm thick bottom self-adhesive asphalt layer, and a first release membrane. The surface layer is composed of a second release membrane and a 1.5mm thick mineral aggregate protective layer. A 12cm long overlap is provided between the first and second intermediate reinforcing asphalt layers. One end of the second base layer extends into the overlap for 3cm. The second release membrane and the overlap are located on both sides of the mineral aggregate protective layer. A third release membrane is provided on the upper surface of the overlap, and a fourth release membrane is provided on the lower surface of the overlap.

[0073] The raw materials for the weather-resistant self-adhesive asphalt layer include the following components in parts by weight: 8 parts atactic polypropylene, 50 parts asphalt, 0.5 parts antioxidant 1010, 0.3 parts ultraviolet absorber UV-531, and 7 parts tackifier;

[0074] The raw materials for both the first and second intermediate reinforced asphalt layers include the following components by weight: 13 parts atactic polypropylene, 55 parts asphalt, and 10 parts modified talc. The modified talc includes epoxy silane modified talc and 4,4'-diaminodiphenylmethane modified talc in a weight ratio of 4:1.

[0075] The preparation method of epoxy-silane modified talc includes the following steps:

[0076] Talc powder and water were mixed to obtain a 15wt% slurry; KH-560, ethanol and water were mixed in a mass ratio of 1:10:1 to obtain a hydrolysate; the hydrolysate was added to the above slurry in a mass ratio of KH-560 to talc powder of 3.5:100, modified at 70℃ for 100 min, filtered and dried to obtain epoxy silane modified talc powder;

[0077] The preparation method of 4,4'-diaminodiphenylmethane modified talc includes the following steps:

[0078] Talc powder was ultrasonically dispersed in methanol (the mass ratio of talc powder to methanol was 1:2). 4,4'-diaminodiphenylmethane was added at a mass ratio of 5:100 to 4,4'-diaminodiphenylmethane. The mixture was modified at 45°C and 350 rpm for 1 hour and then dried to obtain 4,4'-diaminodiphenylmethane modified talc powder.

[0079] The raw materials for the bottom self-adhesive asphalt layer include the following components in parts by weight: 17 parts butyl rubber, 55 parts asphalt, 10 parts SIS elastomer, and 10 parts tackifier.

[0080] The raw materials for the mineral granule protective layer include the following components in parts by weight: shale with a particle size of 2 mm, 10 parts of styrene-butadiene-styrene block copolymer, 4 parts of styrene-butadiene rubber, 50 parts of asphalt, and 5 parts of tackifier; the amount of shale added is based on the ability to spread evenly across the entire mineral granule protective layer.

[0081] Example 3

[0082] The only difference from Example 2 is that the modified talc powder includes epoxy silane modified talc powder, 4,4'-diaminodiphenylmethane modified talc powder, and vinyl silane modified talc powder; wherein the mass ratio of epoxy silane modified talc powder to 4,4'-diaminodiphenylmethane modified talc powder is 4:1; and the mass ratio of epoxy silane modified talc powder, 4,4'-diaminodiphenylmethane modified talc powder to vinyl silane modified talc powder is 2:3.

[0083] The preparation method of vinylsilane modified talc includes the following steps: talc powder and water are mixed to obtain a 15wt% slurry; vinyltriethoxysilane, ethanol and water are mixed in a mass ratio of 1:10:1 to obtain a hydrolysate; the hydrolysate is added to the above slurry in a mass ratio of vinyltriethoxysilane to talc powder of 3.5:100; the mixture is modified at 60℃ for 60 min; filtered and dried to obtain vinylsilane modified talc powder.

[0084] Example 4

[0085] The only difference from Example 3 is that the mass ratio of epoxy-silane modified talc, 4,4'-diaminodiphenylmethane modified talc to vinylsilane modified talc is 3:2.

[0086] Example 5

[0087] The only difference from Example 3 is that the mass ratio of epoxy silane modified talc, 4,4'-diaminodiphenylmethane modified talc to vinyl silane modified talc is 4:1.

[0088] Comparative Example 1

[0089] The only difference from Example 2 is that the modified talc is replaced with an equal amount of talc.

[0090] Comparative Example 2

[0091] The only difference from Example 2 is that the modified talc powder includes epoxy silane modified talc powder and vinyl silane modified talc powder in a mass ratio of 1.2:1;

[0092] The preparation method of vinylsilane modified talc includes the following steps: talc powder and water are mixed to obtain a 15wt% slurry; vinyltriethoxysilane, ethanol and water are mixed in a mass ratio of 1:10:1 to obtain a hydrolysate; the hydrolysate is added to the above slurry in a mass ratio of vinyltriethoxysilane to talc powder of 3.5:100; the mixture is modified at 60℃ for 60 min; filtered and dried to obtain vinylsilane modified talc powder.

[0093] Comparative Example 3

[0094] The only difference from Example 2 is that the modified talc powder includes vinylsilane modified talc powder and 4,4'-diaminodiphenylmethane modified talc powder in a mass ratio of 10:3.

[0095] The preparation method of vinylsilane modified talc includes the following steps: talc powder and water are mixed to obtain a 15wt% slurry; vinyltriethoxysilane, ethanol and water are mixed in a mass ratio of 1:10:1 to obtain a hydrolysate; the hydrolysate is added to the above slurry in a mass ratio of vinyltriethoxysilane to talc powder of 3.5:100; the mixture is modified at 60℃ for 60 min; filtered and dried to obtain vinylsilane modified talc powder.

[0096] Comparative Example 4

[0097] The only difference from Example 2 is that the 4,4'-diaminodiphenylmethane modified talc is replaced with an equal amount of aminosilane modified talc.

[0098] The preparation method of aminosilane modified talc includes the following steps: talc powder and water are mixed to obtain a 15wt% slurry; KH-550, ethanol and water are mixed in a mass ratio of 1:10:1 to obtain a hydrolysate; the hydrolysate is added to the above slurry in a mass ratio of KH-550 to talc powder of 3.5:100, modified at 60℃ for 60 min, filtered, and dried to obtain aminosilane modified talc powder.

[0099] Performance testing:

[0100] (1) Tensile properties were tested according to the method in GB 23441-2009, and the test results are recorded in Table 1.

[0101] Table 1. Tensile property test results of exposed double-layer prefabricated three-layer interlocking waterproof membrane

[0102]

[0103] As can be seen from Table 1, the exposed double-layer prefabricated three-layer interlocking waterproof membrane provided by the present invention has good tensile properties. When used in exposed scenarios such as flat roofs and pitched roofs, it can avoid damage from external forces and extend its service life.

[0104] (2) Heat resistance, low temperature flexibility and impermeability were tested according to the method in GB 23441-2009. The test results are recorded in Table 2.

[0105] Table 2. Test results of heat resistance, low-temperature flexibility, and impermeability of waterproof membrane.

[0106]

[0107] As can be seen from Table 2, the waterproof membrane provided by the present invention has good heat resistance, low-temperature flexibility and impermeability, and can be used in exposed scenarios such as flat roofs and pitched roofs.

[0108] 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. An exposed double-layer prefabricated triple-layer interlocking waterproof membrane, characterized in that, From top to bottom, it includes a surface layer, a weather-resistant self-adhesive asphalt layer, a first base layer, a first intermediate reinforced asphalt layer, a second base layer, a second intermediate reinforced asphalt layer, a third base layer, a bottom self-adhesive asphalt layer, and a first release membrane. The surface layer is composed of a second release membrane and a mineral aggregate protective layer connected together. An overlap is provided at the first and second intermediate reinforced asphalt layers, and one end of the second base layer extends into the overlap. The second release membrane and the overlap are located on both sides of the mineral aggregate protective layer. A third release membrane is provided on the upper surface of the overlap, and a fourth release membrane is provided on the lower surface of the overlap. The raw materials for the first intermediate reinforced asphalt layer and the second intermediate reinforced asphalt layer each independently include the following components: atactic polypropylene, asphalt, and modified talc powder. The modified talc powder includes first modified talc powder and second modified talc powder. The first modified talc powder is epoxy silane modified talc powder, and the second modified talc powder is 4,4'-diaminodiphenylmethane modified talc powder.

2. The exposed double-layer prefabricated triple-layer interlocking waterproof membrane according to claim 1, characterized in that, In the first intermediate reinforcing asphalt layer and / or the second intermediate reinforcing asphalt layer, the mass ratio of the atactic polypropylene, the asphalt, and the modified talc is 13:55:5~10.

3. The exposed double-layer prefabricated triple-base interlocking waterproof membrane according to claim 1, characterized in that, The mass ratio of the first modified talc powder to the second modified talc powder is 3~4:

1.

4. The exposed double-layer prefabricated triple-layer interlocking waterproof membrane according to claim 1, characterized in that, The modified talc powder also includes a third modified talc powder, which is a vinylsilane modified talc powder.

5. The exposed double-layer prefabricated triple-base interlocking waterproof membrane according to claim 4, characterized in that, The mass ratio of the first modified talc powder, the second modified talc powder, and the third modified talc powder is 2:3 to 4:

1.

6. The exposed double-layer prefabricated triple-base interlocking waterproof membrane according to claim 1, characterized in that, The raw materials for the 4,4'-diaminodiphenylmethane modified talc powder include 4,4'-diaminodiphenylmethane and talc powder in a mass ratio of 1~5:

100.

7. The exposed double-layer prefabricated triple-base interlocking waterproof membrane according to claim 1, characterized in that, The preparation method of the 4,4'-diaminodiphenylmethane modified talc powder includes the following steps: ultrasonically dispersing talc powder in methanol, adding 4,4'-diaminodiphenylmethane for modification, and drying to obtain 4,4'-diaminodiphenylmethane modified talc powder.

8. The exposed double-layer prefabricated triple-layer interlocking waterproof membrane according to claim 7, characterized in that, The modification temperature is 35~45℃, and the modification time is 1~2h; stirring is carried out during modification, and the stirring speed is 350~500rpm.

9. The exposed double-layer prefabricated triple-base interlocking waterproof membrane according to claim 1, characterized in that, The raw materials for the epoxy silane modified talc powder include epoxy silane and talc powder in a mass ratio of 1.5~3.5:100; The preparation method of the epoxy-silane modified talc powder includes the following steps: A1. Disperse talc powder in water to obtain a slurry; A2. After mixing epoxy silane, ethanol and water, a hydrolysate is obtained; A3. The hydrolysate is added to the slurry for modification, filtered, and dried to obtain epoxy silane modified talc powder.

10. The exposed double-layer prefabricated triple-base interlocking waterproof membrane according to claim 4, characterized in that, The raw materials for the vinylsilane-modified talc powder include vinylsilane and talc powder in a mass ratio of 1.5~3.5:100; The preparation method of the vinylsilane-modified talc powder includes the following steps: B1. Disperse talc powder in water to obtain a slurry; B2. After mixing vinylsilane, ethanol and water, a hydrolysate is obtained; B3. The hydrolysate is added to the slurry for modification, filtered, and dried to obtain vinylsilane-modified talc powder.

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