SBS (styrene-butadiene-styrene) modified asphalt water-emulsion waterproof coating

Abstract

The invention relates to an SBS (styrene-butadiene-styrene) modified asphalt water-emulsion waterproof coating, which is prepared from the following ingredients in parts by mass: 80 to 100 parts of SBS modified asphalt, 60 to 80 parts of emulsion, 40 to 60 parts of rubber latex, 30 to 40 parts of epoxy resin composite base materials, 18 to 22 parts of composite hydrophobic ingredients, 8 to 10 parts of defoaming agents, 30 to 40 parts of curing agents and 80 to 100 parts of water. The composite hydrophobic base material is prepared from attapulgite composite particles, perfluorodecyl triethoxy silane and ethyl orthosilicate. The effect of improving the waterproof performance of the waterproof coating is achieved.

Description

Technical Field

[0001] The present application relates to the field of asphalt waterproof coatings, and in particular to an SBS modified asphalt water-emulsion waterproof coating. Background Art

[0002] Leakage of building structures has been a problem that has long plagued the construction industry. Building waterproofing technology and waterproofing materials have always been an important topic that scientific researchers have focused on studying.

[0003] As an important global chemical material, petroleum asphalt is widely used in waterproofing, anti-corrosion, chemical raw materials and other fields. Researching and selecting suitable types of asphalt is the primary task of manufacturing and production in various fields.

[0004] However, with the development of industry and the improvement of economy, the current asphalt water-emulsion waterproof coating is increasingly difficult to meet production needs, so it needs to be improved. Summary of the invention

[0005] In order to further improve the waterproof performance of the waterproof coating, the present application provides an SBS modified asphalt water-emulsion waterproof coating.

[0006] The SBS modified asphalt water-emulsion waterproof coating provided in this application adopts the following technical solution: An SBS modified asphalt water-emulsion waterproof coating comprises the following components in parts by weight: 80-100 parts of SBS modified asphalt, 60-80 parts of emulsion, 40-60 parts of rubber latex, 30-40 parts of epoxy resin composite substrate, 18-22 parts of composite hydrophobic component, 8-10 parts of defoamer, 30-40 parts of curing agent, 80-100 parts of water; The composite hydrophobic substrate comprises attapulgite composite particles, perfluorodecyltriethoxysilane and tetraethyl orthosilicate.

[0007] By adopting the above technical scheme, a composite hydrophobic substrate is prepared by using attapulgite composite particles, perfluorodecyltriethoxysilane and tetraethyl orthosilicate, and the surface of the attapulgite composite particles is modified by hydrolysis of perfluorodecyltriethoxysilane and tetraethyl orthosilicate to obtain attapulgite composite particles modified with perfluorodecyltriethoxysilane, which have good hydrophobic properties and further improve the waterproof and hydrophobic properties of the waterproof coating. The attapulgite composite particles are nanoparticles with a stable structure, which further improve the mechanical properties of the waterproof coating.

[0008] Preferably, the attapulgite composite particles are prepared by the following method: Mix N,N-dimethylformamide, water, copper nitrate and 2,3,6,7,10,11-hexahydroxytriphenylene, add attapulgite nanoparticles after stirring, heat and stir under water bath conditions, and obtain attapulgite composite particles after filtration and drying.

[0009] By adopting the above technical solution, a nano-photothermal material is in-situ grown on the surface of attapulgite nanorods to obtain attapulgite composite particles. A large number of MOFs particles are in-situ grown on the surface of attapulgite nanorods, forming a two-stage nanostructure. The prepared attapulgite particles have good stability and mechanical strength, and make the attapulgite composite particles more stable during subsequent modification, thereby further improving the chemical stability of the prepared hydrophobic substrate.

[0010] Preferably, the composite hydrophobic component is prepared by the following method: Mix ethanol and ammonia water to obtain a mixed solution, add attapulgite composite particles to the mixed solution and stir, then perform ultrasonic treatment to obtain a composite particle suspension. Add perfluorodecyltriethoxysilane and tetraethyl orthosilicate to the composite particle suspension, stir and react, and obtain the composite hydrophobic component after centrifugation.

[0011] By adopting the above technical solution, the surface of the attapulgite composite particles is modified by hydrolysis and condensation of perfluorodecyltriethoxysilane and tetraethyl orthosilicate, so that the attapulgite composite particles have good hydrophobic properties and good stability at the same time.

[0012] Preferably, the proportion of ethanol in the mixed solution is 26-28%.

[0013] By adopting the above technical solution, preferably, the mass ratio of ethanol in the mixed solution is within the above range, which can further improve the stability of the prepared hydrophobic substrate.

[0014] Preferably, the epoxy resin composite substrate includes modified nano-titanium dioxide, zinc sulfide, graphene and epoxy resin.

[0015] By adopting the above technical solution, after adding the nano system to the epoxy resin system, the overall bonding strength of the resin composite can be improved. At the same time, the wear resistance and corrosion resistance of the overall coating system can be protected. The modified nano-titanium dioxide particles can further improve the tensile properties of the epoxy resin and can also improve the wear resistance of the epoxy resin. The addition of graphite can further increase the elastic modulus of the epoxy resin, thereby improving the tensile strength of the epoxy resin composite substrate to enhance the mechanical strength of the epoxy resin. Zinc sulfide can increase the density of the epoxy resin body, thereby further enhancing the stability of the epoxy resin system. At the same time, the added nano particles have good corrosion resistance, making the prepared waterproof coating have good corrosion resistance.

[0016] Preferably, the modified nano-titanium dioxide includes nano-titanium dioxide and titanate coupling agent.

[0017] Preferably, the modified nano-titanium dioxide is prepared by the following method: Mix nano-titanium dioxide, ethanol and water, ultrasonically disperse, then add titanate coupling agent, raise the temperature for reaction, then centrifuge and precipitate the reactants, wash and dry to obtain modified nano-titanium dioxide.

[0018] By adopting the above technical solution, after modifying the surface of titanium dioxide with titanate coupling agent, a nano-scale rough hydrophobic system is constructed. At the same time, it has good corrosion resistance and friction properties. The dispersion and bonding properties of the modified nano-titanium dioxide in the resin body are both improved, thereby improving the stability of the prepared resin matrix. At the same time, the hydrophobic property of the prepared waterproof coating is further improved.

[0019] Preferably, the mass ratio between the nano-titanium dioxide and the titanate coupling agent is 1:(0.11 - 0.13).

[0020] By adopting the above technical solution, preferably, the mass ratio between the nano-titanium dioxide and the titanate coupling agent is within the above range, which can further improve the stability of the prepared modified nano-titanium dioxide.

[0021] Preferably, the mass ratio between the epoxy resin, the modified nano-titanium dioxide, graphene and zinc sulfide is 11:(0.8 - 1):1.3:1.

[0022] By adopting the above technical solution, preferably, the mass ratio between the epoxy resin, the modified nano-titanium dioxide, graphene and zinc sulfide is within the above range, which can further improve the overall stability of the prepared epoxy resin matrix.

[0023] In summary, the present application includes at least one of the following beneficial technical effects: 1. The attapulgite composite particles have good mechanical properties. When added to the coating, they can effectively improve the overall wear resistance and mechanical stability of the coating system. After modifying the surface of the attapulgite composite particles by hydrolysis of perfluorodecyltriethoxysilane and tetraethyl orthosilicate, the attapulgite composite particles have good hydrophobic properties, further improving the overall hydrophobic and waterproof properties of the waterproof coating, and at the same time further improving the stability of the coating system. 2. MOFs particles are in-situ grown on the surface of attapulgite nanoparticles to form a two-stage nanostructure. The prepared attapulgite composite particles have good mechanical properties and stability. By combining with the attapulgite composite particles through the spi binder, the prepared composite hydrophobic component can be more stably combined with other components, further improving the overall stability of the waterproof coating. 3. Modified nano-titanium dioxide, zinc sulfide and graphene are added to the epoxy resin composite substrate. The nanoparticles can fill the voids in the epoxy resin, thereby improving the density of the epoxy resin, and at the same time protecting the overall wear resistance and corrosion resistance of the coating system, and further improving the overall stability of the system. Specific embodiments

[0024] The following further elaborates on the present application in conjunction with the embodiments: Raw material description: All raw materials in the embodiments can be obtained commercially; among them, the emulsion is styrene-acrylic emulsion (CAS No.: 25085-34-1); the latex is carboxylated nitrile latex; the defoamer is polysiloxane defoamer, and the curing agent is triethylenetetramine (CAS No.: 112-24-3).

[0025] Example 1 Preparation of modified nano-titanium dioxide: 7.21 g of nano-titanium dioxide, 90 g of ethanol and 10 g of deionized water are mixed, ultrasonically dispersed for 1 h, then 0.79 g of titanate coupling agent (CAS No.: 65460-52-8) is added, the pH of the system is adjusted to 4 with acetic acid, the temperature is raised to 80 °C, and the reaction is carried out for 4 h. Then the reactants are centrifuged and precipitated, washed three times alternately with ethanol and deionized water, and the product is dried in an oven at 80 °C for 10 h to obtain modified nano-titanium dioxide.

[0026] Preparation of epoxy resin matrix: Mix 70 g of ethanol with 2.84 g of modified nano-titanium dioxide. After stirring for 5 min, add 0.38 g of polyvinylpyrrolidone (CAS No.: 9003-39-8). After stirring, add 39 g of epoxy resin, 12 g of polydimethylsiloxane (CAS No.: 9016-00-6) and 60 g of ethyl acetate (CAS No.: 141-78-6). Ultrasonic for 30 min, then add 4.61 g of graphene and 3.55 g of zinc sulfide, stir at a speed of 3000 r / min for 60 min, stir at 120 °C under certain conditions for 2 h, and cool to 25 °C to obtain an epoxy resin matrix.

[0027] Prepare attapulgite composite particles: Mix 10 g of N,N-dimethylformamide (CAS No.: 68-12-2) and 100 g of deionized water to obtain an N,N-dimethylformamide mixed solution. Add 29.1 g of copper nitrate and 19.5 g of 2,3,6,7,10,11-hexahydroxytriphenyl (CAS No.: 4877-80-9) to the N,N-dimethylformamide mixed solution in sequence, stir for 10 min, then add 50 g of attapulgite nanoparticles (CAS No.: 1337-76-4), and stir at a speed of 500 r / min for 6 h under a water bath condition of 85 °C, then filter, and dry in an oven at 80 °C to obtain attapulgite composite particles.

[0028] Prepare a composite hydrophobic component: Mix 260 g of ethanol and 740 g of ammonia water to obtain a mixed solution. Add 30 g of attapulgite composite particles to the mixed solution, stir for 10 min, then perform ultrasonic treatment for 5 min to obtain a composite particle suspension. Add 24 g of perfluorodecyltriethoxysilane (CAS No.: 101947-16-4) and 3 g of tetraethyl orthosilicate to the composite particle suspension, and stir and react at 25 °C for 2 h, and obtain a composite hydrophobic component after centrifugation.

[0029] Prepare a waterproof coating: Mix 80 g of SBS modified asphalt, 60 g of emulsion, 40 g of rubber latex, 30 g of epoxy resin composite substrate, 18 g of composite hydrophobic component, 8 g of defoamer, 30 g of curing agent, and 80 g of water, and stir for 60 min to obtain a waterproof coating.

[0030] Example 2 Prepare modified nano-titanium dioxide: Mix 7.08 g of nano-titanium dioxide, 90 g of ethanol and 10 g of deionized water, ultrasonically disperse for 1 h, then add 0.92 g of titanate coupling agent, adjust the pH of the system to 4 with acetic acid, heat up to 80 °C, react for 4 h, then centrifuge and precipitate the reactants, wash three times alternately with ethanol and deionized water, and dry the product in an oven at 80 °C for 10 h to obtain modified nano-titanium dioxide.

[0031] Prepare the epoxy resin matrix: Mix 70 g of ethanol with 3.5 g of modified nano-titanium dioxide, stir for 5 min, then add 0.38 g of polyvinylpyrrolidone, stir and then add 38.45 g of epoxy resin, 12 g of polydimethylsiloxane and 60 g of ethyl acetate, ultrasonically treat for 30 min, then add 4.55 g of graphene and 3.5 g of zinc sulfide, stir at a speed of 3000 r / min for 60 min, stir under reflux conditions at 120 °C for 2 h, and cool to 25 °C to obtain the epoxy resin matrix.

[0032] Prepare attapulgite composite particles: Mix 10 g of N,N-dimethylformamide and 100 g of deionized water to obtain an N,N-dimethylformamide mixed solution. Add 29.1 g of copper nitrate and 19.5 g of 2,3,6,7,10,11-hexahydroxytriphenylene to the N,N-dimethylformamide mixed solution in sequence, stir for 10 min, then add 50 g of attapulgite nanoparticles, stir at a speed of 500 r / min for 6 h under a water bath condition of 85 °C, then filter, and dry in an oven at 80 °C to obtain attapulgite composite particles.

[0033] Prepare the composite hydrophobic component: Mix 280 g of ethanol and 720 g of ammonia water to obtain a mixed solution. Add 30 g of attapulgite composite particles to the mixed solution, stir for 10 min, then ultrasonically treat for 5 min to obtain a composite particle suspension. Add 24 g of perfluorodecyltriethoxysilane and 3 g of tetraethyl orthosilicate to the composite particle suspension, stir and react at 25 °C for 2 h, and centrifuge to obtain the composite hydrophobic component.

[0034] Prepare the waterproof coating: Mix 100 g of SBS modified asphalt, 80 g of emulsion, 60 g of rubber latex, 40 g of epoxy resin composite substrate, 22 g of composite hydrophobic component, 10 g of defoamer, 40 g of curing agent and 100 g of water, and stir for 60 min to obtain the waterproof coating.

[0035] Example 3 Prepare modified nano-titanium dioxide: Mix 7.14 g of nano-titanium dioxide, 90 g of ethanol and 10 g of deionized water, ultrasonically disperse for 1 h, then add 0.86 g of titanate coupling agent, adjust the pH of the system to 4 with acetic acid, heat up to 80 °C, react for 4 h, then centrifuge the reactants to precipitate, wash three times alternately with ethanol and deionized water, and dry the product in an oven at 80 °C for 10 h to obtain modified nano-titanium dioxide.

[0036] Prepare epoxy resin matrix: Mix 70 g of ethanol with 3.17 g of modified nano-titanium dioxide, stir for 5 min, then add 0.38 g of polyvinylpyrrolidone, stir and then add 38.73 g of epoxy resin, 12 g of polydimethylsiloxane and 60 g of ethyl acetate, ultrasonically treat for 30 min, then add 4.58 g of graphene and 3.52 g of zinc sulfide, stir at a speed of 3000 r / min for 60 min, stir under reflux conditions at 120 °C for 2 h, cool to 25 °C to obtain epoxy resin matrix.

[0037] Prepare attapulgite composite particles: Mix 10 g of N,N-dimethylformamide and 100 g of deionized water to obtain an N,N-dimethylformamide mixed solution, add 29.1 g of copper nitrate and 19.5 g of 2,3,6,7,10,11-hexahydroxytriphenylene to the N,N-dimethylformamide mixed solution in sequence, stir for 10 min, then add 50 g of attapulgite nanoparticles, stir at a speed of 500 r / min under water bath conditions at 85 °C for 6 h, then filter and dry in an oven at 80 °C to obtain attapulgite composite particles.

[0038] Prepare composite hydrophobic component: Mix 270 g of ethanol and 730 g of ammonia water to obtain a mixed solution, add 30 g of attapulgite composite particles to the mixed solution, stir for 10 min, then ultrasonically treat for 5 min to obtain a composite particle suspension, add 24 g of perfluorodecyltriethoxysilane and 3 g of tetraethyl orthosilicate to the composite particle suspension, stir and react at 25 °C for 2 h, and centrifuge to obtain the composite hydrophobic component.

[0039] Prepare waterproof coating: Mix 90 g of SBS modified asphalt, 70 g of emulsion, 50 g of rubber latex, 35 g of epoxy resin composite substrate, 20 g of composite hydrophobic component, 9 g of defoamer, 35 g of curing agent and 90 g of water, and stir for 60 min to obtain the waterproof coating.

[0040] Example 4 Example 4 Based on Example 3, the difference between Example 4 and Example 3 is that when preparing modified nano-titanium dioxide in Example 4, 7.41 g of nano-titanium dioxide and 0.59 g of titanate coupling agent are used.

[0041] Example 5 Example 5 Based on Example 3, the difference between Example 5 and Example 3 is that when preparing modified nano-titanium dioxide in Example 3, 6.7 g of nano-titanium dioxide and 1.3 g of titanate coupling agent are used.

[0042] Example 6 Example 6 Based on Example 3, the difference between Example 6 and Example 3 is that when preparing the epoxy resin composite substrate in Example 6, 39.56 g of epoxy resin, 2.16 g of modified nano-silica, 4.68 g of graphene, and 3.6 g of zinc sulfide are used.

[0043] Example 7 Example 7 Based on Example 3, the difference between Example 7 and Example 3 is that when preparing the epoxy resin composite substrate in Example 7, 37.93 g of epoxy resin, 4.14 g of modified nano-silica, 4.48 g of graphene, and 3.45 g of zinc sulfide are used.

[0044] Example 8 Example 8 Based on Example 3, the difference between Example 8 and Example 3 is that when preparing the composite hydrophobic component in Example 8, the mixed solution is prepared with 230 g of ethanol and 770 g of ammonia water.

[0045] Example 9 Example 9 Based on Example 3, the difference between Example 9 and Example 3 is that when preparing the composite hydrophobic component in Example 9, the mixed solution is prepared with 300 g of ethanol and 700 g of ammonia water.

[0046] Example 10 Example 10 Based on Example 3, the difference between Example 10 and Example 3 is that when preparing the epoxy resin composite substrate, the modified nano-titanium dioxide is replaced with an equal amount of unmodified nano-titanium dioxide.

[0047] Example 11 Example 11 Based on Example 3, the difference between Example 11 and Example 3 is that when preparing the epoxy resin composite substrate in Example 11, the graphene is replaced with an equal amount of epoxy resin.

[0048] Example 12 Example 12 is based on Example 3. The difference between Example 12 and Example 3 is that when preparing the epoxy resin composite substrate in Example 12, zinc sulfide is replaced with an equal amount of epoxy resin.

[0049] Comparative Example 1 Comparative Example 1 is based on Example 3. In Comparative Example 1, the epoxy resin composite substrate is replaced with an equal amount of ordinary epoxy resin.

[0050] Comparative Example 2 Comparative Example 2 is based on Example 3. In Comparative Example 2, when preparing the composite hydrophobic component, the attapulgite composite particles are replaced with an equal amount of attapulgite nanoparticles.

[0051] Performance detection test The following performance tests are carried out on the specimens of Examples 1-12 and Comparative Examples 1-2: (1) Waterproof performance The hydrophobic angle of the specimen is tested. Each specimen is tested three times, and the average value is taken. The test results are filled in Table 1.

[0052] (2) Abrasion resistance The RCA wear is measured by a Norman RCA wear tester with a load of 175 g. The abrasion resistance of the specimen is tested. Each specimen is tested three times, and the average value is taken. The test results are filled in Table 1.

[0053] (3) Corrosion resistance is tested according to the detection standard of "GB / T 1771". The corrosion resistance of the specimen is tested. Each specimen is tested 3 times, and the average value is taken. The test results are filled in Table 1.

[0054] Table 1 Performance test results of Examples 1-12 and Comparative Examples 1-2 Combined with Table 1, it can be seen that the waterproof performance of Examples 1-3 is all above 151°, indicating that the waterproof coating prepared in this application has good waterproof performance; the RCA wear of Examples 1-3 is all above 12225 times, indicating that the waterproof coating prepared in this application has good corrosion resistance, and the salt spray resistance time of Examples 1-3 can all be above 717 h, indicating that the waterproof coating prepared in this application has good corrosion resistance.

[0055] In Examples 4 and 5, when preparing the modified nano-titanium dioxide, the mass ratio between the nano-titanium dioxide and the titanate coupling agent is not within the scope defined in this application. When the amount of the titanate coupling agent used is too small, it is difficult to sufficiently modify the nano-titanium dioxide, the hydrophobic angle of the nano-titanium dioxide is difficult to further increase, the hydrophobic performance decreases, and the dispersibility in the system is difficult to improve, affecting the overall stability of the system; when the amount of the titanate coupling agent used is too large, it will cause self-aggregation, thus affecting the dispersibility of the nano-titanium dioxide. Therefore, the performance of Examples 4 and 5 both decreases.

[0056] In Examples 6 and 7, when preparing the epoxy resin composite substrate, the mass ratio among the epoxy resin, the modified nano-silica, the graphene and the zinc sulfide is not within the scope defined in this application. When the content of the modified nano-silica is too small, it is difficult to further fill the voids of the epoxy resin, so it is difficult to further improve the mechanical tensile performance of the epoxy resin, and the content of the hydrophobic component decreases, affecting the waterproof performance of the system; when the content of the modified nano-silica is too large, it will cause stress concentration of the epoxy resin, ultimately affecting the overall mechanical strength of the system and decreasing the stability. Therefore, the comprehensive performance of Examples 6 and 7 both decreases.

[0057] In Examples 8 and 9, when preparing the composite hydrophobic component, the mass ratio of ethanol and ammonia water in the mixed solution is not within the scope defined in this application. When the proportion of ethanol is too small, the roughness of the coating surface is difficult to further increase, so the hydrophobic performance is difficult to further improve. At the same time, the binding performance between the composite hydrophobic component and other components in the system is difficult to improve, so the stability decreases. When the addition amount of ethanol is too large, it will affect the overall stability of the system, thus affecting the comprehensive performance of the system. Therefore, the performance of Examples 8 and 9 both decreases.

[0058] In Example 10, when preparing the epoxy resin composite substrate, the modified nano-titanium dioxide is replaced by unmodified nano-titanium dioxide. Ordinary nano-titanium dioxide is difficult to combine with the epoxy resin to construct a surface micro-nano structure, and the hydrophobic angle is difficult to further increase. The waterproof performance of the system decreases. At the same time, the dispersibility of the nano-titanium dioxide is difficult to further improve, resulting in a decrease in the overall stability of the system. Therefore, the comprehensive performance of Example 10 decreases.

[0059] In Example 11, the graphene is replaced by an equal amount of epoxy resin, and in Example 12, the zinc sulfide is replaced by an equal amount of epoxy resin. Without adding graphene or without adding zinc sulfide, it is difficult to further fill the epoxy resin, so that the stability of the epoxy resin cannot be further improved. Therefore, the performance of Examples 11 and 12 both decreases.

[0060] In Comparative Example 1, the epoxy resin composite substrate was replaced with ordinary epoxy resin. It was difficult to further fill the interior of the epoxy resin without adding the nano-system, resulting in a decrease in mechanical strength and corrosion resistance. At the same time, the stability was difficult to further improve. Therefore, the performance of Comparative Example 1 decreased.

[0061] In Comparative Example 2, when preparing the hydrophobic component, the attapulgite composite particles were replaced with an equal amount of ordinary attapulgite composite particles without MOFs material coating on the surface. The stability of the prepared hydrophobic component decreased, and at the same time, the effect of subsequent surface hydrophobic modification of the attapulgite composite particles also decreased. Therefore, the performance of Comparative Example 2 decreased.

[0062] This specific embodiment is only an explanation of the present application and does not limit the present application. Through the above description, relevant staff can make various changes and modifications without departing from the technical idea of this application. The technical scope of this application is not limited to the content in the specification and must be determined according to the scope of the claims.

Claims

1. A SBS modified asphalt water-emulsion waterproof coating, characterized in that: The composition comprises the following components in parts by weight: 80-100 parts of SBS modified asphalt, 60-80 parts of emulsion, 40-60 parts of rubber latex, 30-40 parts of epoxy resin composite substrate, 18-22 parts of composite hydrophobic component, 8-10 parts of defoamer, 30-40 parts of curing agent, 80-100 parts of water; The composite hydrophobic substrate comprises attapulgite composite particles, perfluorodecyltriethoxysilane and tetraethyl orthosilicate.

2. The SBS modified asphalt water-emulsion waterproof coating according to claim 1, characterized in that: The attapulgite composite particles are prepared by the following method: N,N-dimethylformamide, water, copper nitrate and 2,3,6,7,10,11-hexahydroxytriphenyl are mixed, and attapulgite nanoparticles are added after stirring. The mixture is heated and stirred in a water bath, and attapulgite composite particles are obtained after filtering and drying.

3. The SBS modified asphalt water-emulsion waterproof coating according to claim 2, characterized in that: The composite hydrophobic component is prepared by the following method: Ethanol and ammonia water are mixed to obtain a mixed solution, attapulgite composite particles are added to the mixed solution and stirred, and then ultrasonic treatment is performed to obtain a composite particle suspension, perfluorodecyltriethoxysilane and ethyl orthosilicate are added to the composite particle suspension, stirred for reaction, and centrifuged to obtain a composite hydrophobic component.

4. The SBS modified asphalt water-emulsion waterproof coating according to claim 3, characterized in that: The proportion of ethanol in the mixed solution is 26-28%.

5. The SBS modified asphalt water-emulsion waterproof coating according to claim 1, characterized in that: The epoxy resin composite substrate comprises modified nano titanium dioxide, zinc sulfide, graphene and epoxy resin.

6. The SBS modified asphalt water-emulsion waterproof coating according to claim 5, characterized in that: The modified nano titanium dioxide comprises nano titanium dioxide and a titanate coupling agent.

7. The SBS modified asphalt water-emulsion waterproof coating according to claim 6, characterized in that: The modified nano titanium dioxide is prepared by the following method: The nano-titanium dioxide, ethanol and water are mixed, ultrasonically dispersed, and then a titanate coupling agent is added, the temperature is raised for reaction, and then the reactant is centrifuged and precipitated, washed and dried to obtain the modified nano-titanium dioxide.

8. The SBS modified asphalt water-emulsion waterproof coating according to claim 6, characterized in that: The mass ratio between the nano titanium dioxide and the titanate coupling agent is 1:(0.11-0.13).

9. The SBS modified asphalt water-emulsion waterproof coating according to claim 5, characterized in that: The mass ratio of the epoxy resin, modified nano titanium dioxide, graphene and zinc sulfide is 11:(0.8-1):1.3:1.

Images