Anti-corrosion asphalt waterproof coiled material and preparation method thereof

Abstract

The invention discloses an anti-corrosion asphalt waterproof coiled material and a preparation method thereof, the waterproof coiled material comprises an anti-corrosion layer, a flame-retardant layer, a main body material layer and a wear-resistant layer which are sequentially arranged from top to bottom, the main body material layer comprises, by weight, 60-80 parts of petroleum asphalt, 15-22 parts of SBS, 20-30 parts of an inorganic filler, 0.2-0.4 part of an antioxidant and 25-40 parts of a coupling agent; the anti-corrosion layer comprises 55-65 parts of epoxy resin, 30-40 parts of an ethylene-vinyl acetate copolymer, 2-5 parts of a curing agent and 2-5 parts of a compatilizer; the flame-retardant layer is prepared from 50 to 60 parts of polyether polyol, 45 to 55 parts of isocyanate, 22 to 32 parts of a flame retardant, 0.2 to 0.5 part of a dispersing agent and 0.6 to 1.0 part of a de-foaming agent; the wear-resistant layer is prepared from 25 to 35 parts of polyether-ether-ketone resin, 25 to 35 parts of epoxy modified polyurethane resin, 3 to 8 parts of compatilizer and 0.2 to 0.4 part of antioxidant; the corrosion resistance, flame retardance and wear resistance of the waterproof coiled material are improved, the waterproof coiled material can be used for building walls, roofs, tunnels, roads, refuse landfills and the like, the preparation method is simple, and application and popularization are facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of waterproof materials, and in particular to an anti-corrosion asphalt waterproof coiled material and a preparation method thereof. Background Art

[0002] In recent years, my country's building waterproofing materials industry has developed greatly and the product structure has been greatly improved, but modified asphalt waterproofing membrane, as a major category of asphalt-based waterproofing materials, still occupies a large share in the waterproofing materials market.

[0003] Waterproof membrane is mainly used in building walls, roofs, tunnels, roads, landfills, etc. It is a flexible building material product that can be rolled into a roll to resist the seepage of external rainwater and groundwater. As a leak-free connection between the project foundation and the building, it is the first barrier to waterproofing the entire project and plays a vital role in the entire project.

[0004] Waterproof coatings and waterproof membranes are commonly used materials in building waterproofing projects. According to different materials and properties, waterproof membranes can be divided into various types such as polymer waterproof membranes, self-adhesive waterproof membranes, metal foil composite waterproof membranes, asphalt waterproof membranes, etc. Among these waterproof membranes, asphalt waterproof membranes have good waterproof and aging resistance and cost-effectiveness, and are widely used in waterproofing projects of structures such as roofs, basements, tunnels, and bridges in combination with waterproof coatings. With the increasing market demand for waterproof membranes, higher requirements are also placed on the performance of waterproof membranes. Therefore, the present invention provides an anti-corrosion asphalt waterproof membrane and a preparation method thereof to improve the anti-corrosion performance of the asphalt waterproof membrane. Summary of the invention

[0005] The purpose of the present invention is to provide a modified asphalt waterproofing coiled material and a preparation method thereof, so as to fill the gap in the current technology.

[0006] The purpose of the present invention is achieved through the following technical solutions:

[0007] An anticorrosive asphalt waterproofing coiled material, the waterproofing coiled material comprises an anticorrosive layer, a flame retardant layer, a main material layer, and a wear-resistant layer arranged in sequence from top to bottom; the thickness of the anticorrosive layer is 0.14-0.18 mm, the thickness of the flame retardant layer is 0.12-0.16 mm, the thickness of the main material layer is 0.5-0.7 mm, and the thickness of the wear-resistant layer is 0.25-0.35 mm; by weight, the main material layer comprises 60-80 parts of petroleum asphalt, 15-22 parts of SBS, 20-30 parts of inorganic filler, and 0.2-0. 4 parts, coupling agent 25-40 parts; the anti-corrosion layer includes 55-65 parts of epoxy resin, 30-40 parts of ethylene-vinyl acetate copolymer, 2-5 parts of curing agent, and 2-5 parts of compatibilizer; the flame retardant layer includes 50-60 parts of polyether polyol, 45-55 parts of isocyanate, 22-32 parts of flame retardant, 0.2-0.5 parts of dispersant, and 0.6-1.0 parts of defoaming agent; the wear-resistant layer includes 25-35 parts of polyether ether ketone resin, 25-35 parts of epoxy modified polyurethane resin, 3-8 parts of compatibilizer, and 0.2-0.4 parts of antioxidant.

[0008] Preferably, the average particle size of the inorganic filler is 0.5 to 2 microns, and the inorganic filler is selected from one or more of silicon dioxide, aluminum hydroxide, aluminum oxide, talc, aluminum nitride, boron nitride, silicon carbide, barium sulfate, boehmite, barium titanate, strontium titanate, calcium carbonate, calcium silicate, and mica.

[0009] Preferably, the antioxidant is selected from one of antioxidant 1010, antioxidant 1076, di-tert-butylphenol, catechol, hydroquinone, thiobisphenol, tri-tert-butyl hydroxybenzoate, and parahydroxybenzoate.

[0010] Preferably, the coupling agent is a silane coupling agent, and the silane coupling agent is selected from one or more of vinyl triethoxysilane, vinyl trimethoxysilane, vinyl tri(β-methoxyethoxy)silane, vinyl triisopropoxysilane, vinyl triacetoxysilane, and divinylbenzene silane.

[0011] Preferably, the curing agent is selected from one of adipic acid dihydrazide, 2-methylimidazole, triethylenetetramine, diethylenetetramine or tetraethylenetetramine.

[0012] Preferably, the flame retardant is selected from one of polybutylene succinate, tetrabromobisphenol A and hexabromocyclododecane.

[0013] Preferably, the dispersant is selected from sodium polyacrylate, polycarboxylate and sulfonate.

[0014] Preferably, the defoaming agent is selected from one of polydimethylsiloxane, GP type defoaming agent and GPE type defoaming agent.

[0015] Preferably, the compatibilizer is selected from one of polypropylene maleic anhydride grafts, polypropylene caprolactone grafts, styrene-maleic anhydride copolymers, and methyl methacrylate-butadiene-styrene copolymers.

[0016] The method for preparing the above-mentioned anticorrosive asphalt waterproofing membrane comprises the following steps:

[0017] (1) Add petroleum asphalt, inorganic filler and antioxidant into a stirring kettle at a stirring speed of 1000-1200 rpm, heat to 65-70°C, stir for 30-40 min, continue to heat to 80-95°C, stir for 30-40 min, add SBS and coupling agent and continue to stir for 1.5-2 h to obtain a main material layer blend for use;

[0018] (2) adding epoxy resin, ethylene-vinyl acetate copolymer and compatibilizer into a stirring kettle at a stirring speed of 400-600 rpm, heating to 55-60° C., stirring for 2-3 hours, adding curing agent and continuing to heat to 65-75° C., stirring for 2-3 hours, and obtaining an anticorrosive layer blend for use;

[0019] (3) Add polyether polyol, flame retardant and dispersant into a stirring kettle at a stirring speed of 600-800 rpm, raise the temperature to 90-100° C., stir for 1.5-2 h, dehydrate the obtained mixed system to a moisture content of less than 500 ppm, then cool to 80-85° C., add isocyanate and defoaming agent thereto for reaction, stir for 2-3 h, and obtain a flame retardant layer blend for use;

[0020] (4) adding polyetheretherketone resin, epoxy modified polyurethane resin, compatibilizer and antioxidant into a stirring kettle at a stirring speed of 500 to 700 rpm, heating to 70 to 80° C., stirring for 3 to 4 hours, and obtaining a wear-resistant layer blend for use;

[0021] (5) The main material layer blend obtained above is placed in a twin-screw extruder at an extrusion temperature of 100-120°C. After extrusion, it is sent to a calender for calendering, then cooled and shaped by a cooling roller group, and calendered again to generate a main material layer. The anti-corrosion layer blend, the flame retardant layer blend, and the wear-resistant layer blend are respectively placed in a twin-screw extruder at an extrusion temperature of 100-120°C. They are respectively subjected to extrusion, cooling and shaping by a tablet press, crushing and screening to obtain each blend particle. The particle size of each blend particle is 30-40 microns. The flame retardant layer blend particles and the wear-resistant layer blend particles are respectively sprayed onto both sides of the main material layer for the first composite calendering. After the first composite calendering, the anti-corrosion layer blend particles are sprayed onto the surface of the flame retardant layer for the second composite calendering. After the first composite calendering, the anti-corrosion layer blend particles are sprayed onto the surface of the flame retardant layer for the second composite calendering. After the cooling and shaping by a cooling roller group, deviation correction and metering and winding are performed to obtain the anti-corrosion asphalt waterproof membrane.

[0022] Due to the application of the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0023] The present invention improves the anti-corrosion performance and durability of the waterproof coiled material; the waterproof coiled material of the present invention can be used in building walls, roofs, tunnels, roads, landfills, etc., and the preparation method is simple, which is conducive to promotion and application. DETAILED DESCRIPTION

[0024] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, a specific implementation scheme is now described in detail.

[0025] The present invention is further described below in conjunction with the examples, but the present invention is not limited to the following examples. The implementation conditions used in the examples can be further adjusted according to the different requirements of specific use, and the implementation conditions not indicated are conventional conditions in the industry. The technical features involved in each embodiment of the present invention can be combined with each other as long as they do not conflict with each other.

[0026] Example 1

[0027] This embodiment provides a method for preparing an anti-corrosion asphalt waterproofing membrane, comprising the following steps:

[0028] (1) 70 parts of petroleum asphalt, 25 parts of silicon dioxide, and 0.3 parts of antioxidant 1010 were added to a stirring kettle at a stirring speed of 100 rpm, heated to 70°C, stirred for 40 minutes, and then heated to 90°C and stirred for 40 minutes. 20 parts of SBS and 30 parts of vinyl triethoxysilane were added and stirred for 2 hours to obtain a main material layer blend for use;

[0029] (2) Add 60 parts of epoxy resin, 36 parts of ethylene-vinyl acetate copolymer, and 3 parts of polypropylene maleic anhydride grafted product into a stirring kettle at a stirring speed of 600 rpm, raise the temperature to 60° C., and stir for 3 hours. Add 3 parts of 2-methylimidazole and continue to raise the temperature to 75° C. and stir for 3 hours to obtain an anti-corrosion layer blend for use;

[0030] (3) 56 parts of polyether polyol, 28 parts of polybutylene succinate, and 0.4 parts of sodium polyacrylate were added to a stirring kettle at a stirring speed of 800 rpm, heated to 95° C., and stirred for 2 h. The obtained mixed system was dehydrated to a moisture content of less than 500 ppm, then cooled to 80° C., 50 parts of isocyanate and 0.8 parts of polydimethylsiloxane were added thereto for reaction, and stirred for 3 h to obtain a flame retardant layer blend for standby use;

[0031] (4) 30 parts of polyetheretherketone resin, 30 parts of epoxy-modified polyurethane resin, 5 parts of polypropylene maleic anhydride grafted product, and 0.3 parts of antioxidant 1010 were added into a stirring kettle at a stirring speed of 700 rpm, heated to 80° C., and stirred for 4 hours to obtain a wear-resistant layer blend for use;

[0032] (5) The main material layer blend obtained above is placed in a twin-screw extruder at an extrusion temperature of 110°C. After extrusion, it is sent to a calender for calendering, then cooled and shaped by a cooling roller group, and calendered again to generate a main material layer. The anti-corrosion layer blend, the flame retardant layer blend, and the wear-resistant layer blend are respectively placed in a twin-screw extruder at an extrusion temperature of 110°C. They are respectively subjected to extrusion, cooling and shaping by a tablet press, crushing and screening treatments to obtain each blend particle. The particle size of each blend particle is 30 to 40 microns. The flame retardant layer blend particles and the wear-resistant layer blend particles are respectively sprayed onto both sides of the main material layer for the first composite calendering. After the first composite calendering, the anti-corrosion layer blend particles are sprayed onto the surface of the flame retardant layer for the second composite calendering. After the first composite calendering, the anti-corrosion layer blend particles are sprayed onto the surface of the flame retardant layer for the second composite calendering. After the cooling and shaping, deviation correction and metering and winding by a cooling roller group are carried out, the anti-corrosion asphalt waterproof membrane is obtained.

[0033] Example 2

[0034] This embodiment provides a method for preparing an anti-corrosion asphalt waterproofing membrane, comprising the following steps:

[0035] (1) 80 parts of petroleum asphalt, 25 parts of silicon dioxide, and 0.3 parts of antioxidant 1010 were added to a stirring kettle at a stirring speed of 100 rpm, heated to 70°C, stirred for 40 minutes, and then heated to 90°C and stirred for 40 minutes. 20 parts of SBS and 30 parts of vinyl triethoxysilane were added and stirred for 2 hours to obtain a main material layer blend for use;

[0036] (2) Add 65 parts of epoxy resin, 36 parts of ethylene-vinyl acetate copolymer, and 3 parts of polypropylene maleic anhydride grafted product into a stirring kettle, stir at a speed of 600 rpm, raise the temperature to 60° C., stir for 3 hours, add 3 parts of 2-methylimidazole, continue to raise the temperature to 75° C., stir for 3 hours, and obtain an anti-corrosion layer blend for use;

[0037] (3) 56 parts of polyether polyol, 28 parts of polybutylene succinate, and 0.4 parts of sodium polyacrylate were added to a stirring kettle at a stirring speed of 800 rpm, heated to 95° C., and stirred for 2 h. The obtained mixed system was dehydrated to a moisture content of less than 500 ppm, then cooled to 80° C., 55 parts of isocyanate and 0.8 parts of polydimethylsiloxane were added thereto for reaction, and stirred for 3 h to obtain a flame retardant layer blend for use;

[0038] (4) 30 parts of polyetheretherketone resin, 30 parts of epoxy-modified polyurethane resin, 5 parts of polypropylene maleic anhydride grafted product, and 0.3 parts of antioxidant 1010 were added into a stirring kettle at a stirring speed of 700 rpm, heated to 80° C., and stirred for 4 hours to obtain a wear-resistant layer blend for use;

[0039] (5) The main material layer blend obtained above is placed in a twin-screw extruder at an extrusion temperature of 110°C. After extrusion, it is sent to a calender for calendering, then cooled and shaped by a cooling roller group, and calendered again to generate a main material layer. The anti-corrosion layer blend, the flame retardant layer blend, and the wear-resistant layer blend are respectively placed in a twin-screw extruder at an extrusion temperature of 110°C. They are respectively subjected to extrusion, cooling and shaping by a tablet press, crushing and screening treatments to obtain each blend particle. The particle size of each blend particle is 30 to 40 microns. The flame retardant layer blend particles and the wear-resistant layer blend particles are respectively sprayed onto both sides of the main material layer for the first composite calendering. After the first composite calendering, the anti-corrosion layer blend particles are sprayed onto the surface of the flame retardant layer for the second composite calendering. After the first composite calendering, the anti-corrosion layer blend particles are sprayed onto the surface of the flame retardant layer for the second composite calendering. After the cooling and shaping, deviation correction and metering and winding by a cooling roller group are carried out, the anti-corrosion asphalt waterproof membrane is obtained.

[0040] Comparative Example 1

[0041] This embodiment provides a method for preparing an anti-corrosion asphalt waterproofing membrane, comprising the following steps:

[0042] (1) 70 parts of petroleum asphalt, 25 parts of silicon dioxide, and 0.3 parts of antioxidant 1010 were added to a stirring kettle at a stirring speed of 100 rpm, heated to 70°C, stirred for 40 minutes, and then heated to 90°C and stirred for 40 minutes. 20 parts of SBS and 30 parts of vinyl triethoxysilane were added and stirred for 2 hours to obtain a main material layer blend for use;

[0043] (2) 56 parts of polyether polyol, 28 parts of polybutylene succinate, and 0.4 parts of sodium polyacrylate were added to a stirring kettle at a stirring speed of 800 rpm, heated to 95° C., and stirred for 2 h. The obtained mixed system was dehydrated to a moisture content of less than 500 ppm, then cooled to 80° C., 50 parts of isocyanate and 0.8 parts of polydimethylsiloxane were added thereto for reaction, and stirred for 3 h to obtain a flame retardant layer blend for use;

[0044] (3) 30 parts of polyetheretherketone resin, 30 parts of epoxy-modified polyurethane resin, 5 parts of polypropylene maleic anhydride grafted product, and 0.3 parts of antioxidant 1010 were added into a stirring kettle at a stirring speed of 700 rpm, heated to 80° C., and stirred for 4 hours to obtain a wear-resistant layer blend for use;

[0045] (4) The main material layer blend obtained above is placed in a twin-screw extruder at an extrusion temperature of 110°C. After extrusion, it is sent to a calender for calendering, and then cooled and shaped by a cooling roller group, and calendered again to generate a main material layer. The flame retardant layer blend and the wear-resistant layer blend are respectively placed in a twin-screw extruder at an extrusion temperature of 110°C. They are respectively subjected to extrusion, cooling and shaping by a tablet press, crushing and screening to obtain each blend particle. The particle size of each blend particle is 30 to 40 microns. The flame retardant layer blend particles and the wear-resistant layer blend particles are respectively sprayed onto both sides of the main material layer for composite calendering, and then cooled and shaped by a cooling roller group, corrected and metered and rolled to obtain an asphalt waterproof membrane.

[0046] Comparative Example 2

[0047] This embodiment provides a method for preparing an anti-corrosion asphalt waterproofing membrane, comprising the following steps:

[0048] (1) 70 parts of petroleum asphalt, 25 parts of silicon dioxide, and 0.3 parts of antioxidant 1010 were added to a stirring kettle at a stirring speed of 100 rpm, heated to 70°C, stirred for 40 minutes, and then heated to 90°C and stirred for 40 minutes. 20 parts of SBS and 30 parts of vinyl triethoxysilane were added and stirred for 2 hours to obtain a main material layer blend for use;

[0049] (2) Add 60 parts of epoxy resin, 36 parts of ethylene-vinyl acetate copolymer, and 3 parts of polypropylene maleic anhydride grafted product into a stirring kettle at a stirring speed of 600 rpm, raise the temperature to 60° C., and stir for 3 hours. Add 3 parts of 2-methylimidazole and continue to raise the temperature to 75° C. and stir for 3 hours to obtain an anti-corrosion layer blend for use;

[0050] (3) 30 parts of polyetheretherketone resin, 30 parts of epoxy-modified polyurethane resin, 5 parts of polypropylene maleic anhydride grafted product, and 0.3 parts of antioxidant 1010 were added into a stirring kettle at a stirring speed of 700 rpm, heated to 80° C., and stirred for 4 hours to obtain a wear-resistant layer blend for use;

[0051] (4) The main material layer blend obtained above is placed in a twin-screw extruder at an extrusion temperature of 110°C. After extrusion, it is sent to a calender for calendering, and then cooled and shaped by a cooling roller group, and calendered again to generate a main material layer. The anti-corrosion layer blend and the wear-resistant layer blend are respectively placed in a twin-screw extruder at an extrusion temperature of 110°C. They are respectively subjected to extrusion, cooling and shaping by a tablet press, crushing and screening to obtain each blend particle. The particle size of each blend particle is 30 to 40 microns. The anti-corrosion layer blend particles and the wear-resistant layer blend particles are respectively sprayed onto both sides of the main material layer for composite calendering, and then cooled and shaped by a cooling roller group, corrected and metered and rolled to obtain an asphalt waterproof membrane.

[0052] Comparative Example 3

[0053] This embodiment provides a method for preparing an anti-corrosion asphalt waterproofing membrane, comprising the following steps:

[0054] (1) 70 parts of petroleum asphalt, 25 parts of silicon dioxide, and 0.3 parts of antioxidant 1010 were added to a stirring kettle at a stirring speed of 100 rpm, heated to 70°C, stirred for 40 minutes, and then heated to 90°C and stirred for 40 minutes. 20 parts of SBS and 30 parts of vinyl triethoxysilane were added and stirred for 2 hours to obtain a main material layer blend for use;

[0055] (2) Add 60 parts of epoxy resin, 36 parts of ethylene-vinyl acetate copolymer, and 3 parts of polypropylene maleic anhydride grafted product into a stirring kettle at a stirring speed of 600 rpm, raise the temperature to 60° C., and stir for 3 hours. Add 3 parts of 2-methylimidazole and continue to raise the temperature to 75° C. and stir for 3 hours to obtain an anti-corrosion layer blend for use;

[0056] (3) 56 parts of polyether polyol, 28 parts of polybutylene succinate, and 0.4 parts of sodium polyacrylate were added to a stirring kettle at a stirring speed of 800 rpm, heated to 95° C., and stirred for 2 h. The obtained mixed system was dehydrated to a moisture content of less than 500 ppm, then cooled to 80° C., 50 parts of isocyanate and 0.8 parts of polydimethylsiloxane were added thereto for reaction, and stirred for 3 h to obtain a flame retardant layer blend for standby use;

[0057] (4) The main material layer blend obtained above is placed in a twin-screw extruder at an extrusion temperature of 110°C. After extrusion, it is sent to a calender for calendering, and then cooled and shaped by a cooling roller group, and calendered again to generate a main material layer. The anti-corrosion layer blend and the flame-retardant layer blend are respectively placed in a twin-screw extruder at an extrusion temperature of 110°C. They are respectively subjected to extrusion, cooling and shaping by a tablet press, crushing and screening to obtain each blend particle. The particle size of each blend particle is 30 to 40 microns. The flame-retardant layer blend particles and the anti-corrosion layer blend particles are respectively sprayed onto both sides of the main material layer for composite calendering, and then cooled and shaped by a cooling roller group, corrected and metered and rolled to obtain an asphalt waterproof membrane.

[0058] The asphalt waterproofing membranes prepared in the above examples and comparative examples were tested, and the test results are shown in Table 1.

[0059] Table 1

[0060]

[0061] It can be seen from Table 1 that the asphalt waterproofing membrane prepared according to the present invention has better performance. In summary, the present invention improves the joint peeling strength and anti-aging performance of the waterproofing membrane, solves the common technical problems in the industry such as rapid attenuation of mechanical properties of the waterproofing membrane after thermal aging and artificial climate accelerated aging, and low joint peeling strength, and improves the anti-corrosion performance, flame retardant performance and wear resistance of the waterproofing membrane. The waterproofing membrane of the present invention can be used for building walls, roofs, tunnels, roads, landfills, etc., and the preparation method is simple, which is conducive to promotion and application.

[0062] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. An anticorrosive asphalt waterproofing membrane, characterized in that: The waterproof coiled material comprises an anti-corrosion layer, a flame retardant layer, a main material layer, and a wear-resistant layer arranged in sequence from top to bottom; the thickness of the anti-corrosion layer is 0.14-0.18 mm, the thickness of the flame retardant layer is 0.12-0.16 mm, the thickness of the main material layer is 0.5-0.7 mm, and the thickness of the wear-resistant layer is 0.25-0.35 mm; by weight, the main material layer comprises 60-80 parts of petroleum asphalt, 15-22 parts of SBS, 20-30 parts of inorganic fillers, 0.2-0.4 parts of antioxidants, and 0.5-0.6 parts of coupling agents. The anti-corrosion layer comprises 55-65 parts of epoxy resin, 30-40 parts of ethylene-vinyl acetate copolymer, 2-5 parts of curing agent, and 2-5 parts of compatibilizer; the flame retardant layer comprises 50-60 parts of polyether polyol, 45-55 parts of isocyanate, 22-32 parts of flame retardant, 0.2-0.5 parts of dispersant, and 0.6-1.0 parts of defoaming agent; the wear-resistant layer comprises 25-35 parts of polyether ether ketone resin, 25-35 parts of epoxy modified polyurethane resin, 3-8 parts of compatibilizer, and 0.2-0.4 parts of antioxidant.

2. The anticorrosive asphalt waterproofing membrane according to claim 1, characterized in that: The average particle size of the inorganic filler is 0.5 to 2 microns, and the inorganic filler is selected from one or more of silicon dioxide, aluminum hydroxide, aluminum oxide, talc, aluminum nitride, boron nitride, silicon carbide, barium sulfate, boehmite, barium titanate, strontium titanate, calcium carbonate, calcium silicate, and mica.

3. The anticorrosive asphalt waterproofing membrane according to claim 1, characterized in that: The antioxidant is selected from one of antioxidant 1010, antioxidant 1076, di-tert-butylphenol, catechol, hydroquinone, thiobisphenol, tri-tert-butyl hydroxybenzoate, and p-hydroxybenzoate.

4. The anticorrosive asphalt waterproofing membrane according to claim 1, characterized in that: The coupling agent is a silane coupling agent, and the silane coupling agent is selected from one or more of vinyl triethoxysilane, vinyl trimethoxysilane, vinyl tri(β-methoxyethoxy)silane, vinyl triisopropoxysilane, vinyl triacetoxysilane, and divinylbenzene silane.

5. The anticorrosive asphalt waterproofing membrane according to claim 1, characterized in that: The curing agent is selected from one of adipic acid dihydrazide, 2-methylimidazole, triethylenetetramine, diethylenetetramine or tetraethylenetetramine.

6. The anticorrosive asphalt waterproofing membrane according to claim 1, characterized in that: The flame retardant is selected from one of polybutylene succinate, tetrabromobisphenol A and hexabromocyclododecane.

7. The anticorrosive asphalt waterproofing membrane according to claim 1, characterized in that: The dispersant is selected from sodium polyacrylate, polycarboxylate and sulfonate.

8. The anticorrosive asphalt waterproofing membrane according to claim 1, characterized in that: The defoamer is selected from one of polydimethylsiloxane, GP type defoamer and GPE type defoamer.

9. The anticorrosive asphalt waterproofing membrane according to claim 1, characterized in that: The compatibilizer is selected from one of polypropylene maleic anhydride grafts, polypropylene caprolactone grafts, styrene-maleic anhydride copolymers, and methyl methacrylate-butadiene-styrene copolymers.

10. The method for preparing the anticorrosive asphalt waterproofing membrane according to any one of claims 1 to 9, characterized in that: The steps include: (1) Add petroleum asphalt, inorganic filler and antioxidant into a stirring kettle at a stirring speed of 1000-1200 rpm, heat to 65-70°C, stir for 30-40 min, continue to heat to 80-95°C, stir for 30-40 min, add SBS and coupling agent and continue to stir for 1.5-2 h to obtain a main material layer blend for use; (2) adding epoxy resin, ethylene-vinyl acetate copolymer and compatibilizer into a stirring kettle at a stirring speed of 400-600 rpm, heating to 55-60° C., stirring for 2-3 hours, adding curing agent and continuing to heat to 65-75° C., stirring for 2-3 hours, and obtaining an anticorrosive layer blend for use; (3) Add polyether polyol, flame retardant and dispersant into a stirring kettle at a stirring speed of 600-800 rpm, raise the temperature to 90-100° C., stir for 1.5-2 h, dehydrate the obtained mixed system to a moisture content of less than 500 ppm, then cool to 80-85° C., add isocyanate and defoaming agent thereto for reaction, stir for 2-3 h, and obtain a flame retardant layer blend for use; (4) adding polyetheretherketone resin, epoxy modified polyurethane resin, compatibilizer and antioxidant into a stirring kettle at a stirring speed of 500 to 700 rpm, heating to 70 to 80° C., stirring for 3 to 4 hours, and obtaining a wear-resistant layer blend for use; (5) The main material layer blend obtained above is placed in a twin-screw extruder at an extrusion temperature of 100-120°C. After extrusion, it is sent to a calender for calendering, then cooled and shaped by a cooling roller group, and calendered again to generate a main material layer. The anti-corrosion layer blend, the flame retardant layer blend, and the wear-resistant layer blend are respectively placed in a twin-screw extruder at an extrusion temperature of 100-120°C. They are respectively subjected to extrusion, cooling and shaping by a tablet press, crushing and screening to obtain each blend particle. The particle size of each blend particle is 30-40 microns. The flame retardant layer blend particles and the wear-resistant layer blend particles are respectively sprayed onto both sides of the main material layer for the first composite calendering. After the first composite calendering, the anti-corrosion layer blend particles are sprayed onto the surface of the flame retardant layer for the second composite calendering. After the first composite calendering, the anti-corrosion layer blend particles are sprayed onto the surface of the flame retardant layer for the second composite calendering. After the cooling and shaping by a cooling roller group, deviation correction and metering and winding are performed to obtain the anti-corrosion asphalt waterproof membrane.

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