Acid and alkali resistant elastomer modified asphalt waterproofing coiled material and preparation method thereof

Abstract

This application relates to the field of waterproof membranes, specifically disclosing an acid and alkali resistant elastomer-modified bitumen waterproof membrane and its preparation method; the acid and alkali resistant elastomer-modified bitumen waterproof membrane comprises a base layer, an bitumen layer, and an adhesive layer; the bitumen layer comprises: 80-100 parts bitumen, 2-8 parts styrene-butadiene rubber, 1-5 parts softening oil, 1-4 parts polyethersulfone resin, 1-4 parts petroleum resin, 1-6 parts elastic filler, 1-3 parts compatibilizer, and 1-3 parts anti-aging agent; the adhesive layer comprises: 70-100 parts EVA, 2-8 parts hydrogenated castor oil, and 2-7 parts coating open-cell filler; the preparation method is as follows: the raw materials in the bitumen layer are mixed and heated to obtain bitumen material; the bitumen material is applied to the base layer and dried to form the bitumen layer; the raw materials in the adhesive layer are mixed and heated to obtain adhesive material; the adhesive material is applied to the bitumen layer, and the adhesive material forms the adhesive layer, resulting in the finished product; the waterproof membrane has the advantages of good elasticity, high strength, and good bonding stability at overlapping positions.

Description

Technical Field

[0001] This application relates to the field of waterproof membranes, and more specifically, it relates to an acid and alkali resistant elastomer modified bitumen waterproof membrane and its preparation method. Background Technology

[0002] Waterproof membranes are mainly used in building walls, roofs, tunnels, highways, subways, and other environments to resist external rainwater and underground seepage. When waterproof membranes are used underground, they need to have a certain degree of acid and alkali resistance to minimize the impact of soil acidity and alkalinity on the service life of the waterproof membrane.

[0003] Asphalt waterproof membrane is a rollable sheet waterproof material made by impregnating a base with asphalt and then spreading powdered or sheet-like separating material on the surface. Asphalt waterproof membrane has the advantages of good waterproof performance, convenient construction, and strong adaptability to the substrate. However, when laying asphalt waterproof membrane, multiple pieces need to be spliced ​​together for substrates with complex shapes. The bonding of the overlapping parts of the materials is difficult and can easily affect the sealing effect, thus easily causing problems such as water leakage.

[0004] Therefore, the question is how to prepare a new acid and alkali resistant modified bitumen waterproof membrane that has good elasticity and strength, while also having good bonding stability at the overlapping joints and is less prone to problems such as water leakage at the overlapping joints. Summary of the Invention

[0005] In order to make the waterproof membrane have good elasticity and strength, as well as good bonding stability at the overlapping positions and to prevent water leakage at the overlapping positions, this application provides an acid and alkali resistant elastomer modified bitumen waterproof membrane and its preparation method.

[0006] In a first aspect, this application provides an acid and alkali resistant elastomer-modified bitumen waterproof membrane, employing the following technical solution:

[0007] An acid and alkali resistant elastomeric modified bitumen waterproof membrane, comprising a base layer, an bitumen layer, and an adhesive layer;

[0008] The asphalt layer contains the following raw materials in parts by weight: 80-100 parts asphalt, 2-8 parts styrene-butadiene rubber, 1-5 parts softening oil, 1-4 parts polyethersulfone resin, 1-4 parts petroleum resin, 1-6 parts elastic filler, 1-3 parts compatibilizer, and 1-3 parts anti-aging agent.

[0009] The adhesive layer contains the following raw materials in parts by weight: 70-100 parts EVA, 2-8 parts hydrogenated castor oil, and 2-7 parts coating open-cell filler.

[0010] By adopting the above technical solution, the filling effect of polyethersulfone resin, petroleum resin, and elastic filler is utilized to make the asphalt layer have high elasticity and high strength, and the cross-linking effect is good, which can further improve the structural density of the asphalt layer, thereby further ensuring the strength and elasticity of the asphalt layer; at the same time, EVA in the adhesive layer has good elasticity, and the combination of hydrogenated castor oil and softening oil can further improve the bonding effect and flexibility of the adhesive layer and the asphalt layer, thus making the waterproof membrane have good strength and good flexibility.

[0011] The combination of petroleum resin, polyethersulfone resin, hydrogenated castor oil, and a membrane-coated open-cell filler enhances the bonding density between the asphalt layer and the adhesive layer. This is achieved by utilizing the carboxyl groups in the petroleum resin to facilitate the bonding with the hydroxyl groups in the hydrogenated castor oil, and the ester groups in the polyethersulfone resin to facilitate the bonding with the ester groups in the hydrogenated castor oil. Furthermore, during the roller compaction process after the waterproof membrane is laid, the membrane-coated open-cell filler in the adhesive layer readily adsorbs EVA, hydrogenated castor oil, and softened asphalt, petroleum resin, and styrene-butadiene rubber from the asphalt layer. This adsorption of materials through the pores further improves the bonding effect between the adhesive layer and the asphalt layer, resulting in stable adhesion at the overlapping joints of the waterproof membrane. This prevents the formation of pores and voids at the joints, thus reducing the risk of leakage. Moreover, the hydrophobic properties of EVA, hydrogenated castor oil, and petroleum resin mean that even when the overlapping areas are immersed in water, water leakage is unlikely, resulting in a longer service life for the waterproof membrane.

[0012] Preferably, the membrane-coated open-cell filler is prepared by modifying multi-porous perlite with hydroxyl silicone oil and then loading a bactericide and rosin glycerol ester sequentially; the mass ratio of multi-porous perlite to bactericide is 1:0.2-0.4, and the mass ratio of multi-porous perlite to rosin glycerol ester is 1:0.4-0.7.

[0013] By adopting the above technical solution, multi-porous perlite, hydroxyl silicone oil, bactericide and rosin glycerol ester are combined. The multi-porous structure of the multi-porous perlite facilitates the adsorption of hydroxyl silicone oil. Then, the partial viscosity of the hydroxyl silicone oil facilitates the loading of the bactericide onto the surface of the multi-porous perlite. Finally, rosin glycerol ester is loaded.

[0014] During the compaction process after the waterproof membrane is laid, the membrane structure formed by rosin glycerol ester is prone to rupture under pressure. This rupture exposes the bactericide. In the application of underground waterproof membranes, the bactericide prevents bacteria in the soil from entering the membrane through the overlapping areas, thus ensuring the membrane's lifespan. By limiting the amount of rosin glycerol ester added, the bactericide can directly inhibit and kill bacteria on areas of the multi-porous perlite surface not covered with rosin glycerol ester. Furthermore, the open structure can directly adsorb other materials. In other words, the rosin glycerol ester on the surface of the multi-porous perlite not only improves the adhesion between the membrane-coated open-pore filler and other raw materials but also ensures a relatively uniform dispersion of the bactericide.

[0015] Preferably, the bactericide is composed of nano-silver powder, chitosan micro powder, TPU microparticles and beeswax in a mass ratio of 1:1-4:0.2-0.6:0.4-0.8.

[0016] By adopting the above technical solution, nano-silver powder, chitosan micro powder, TPU microparticles, and beeswax are combined. During the compaction process of the waterproof membrane, while still at a relatively high temperature, the beeswax in the released bactericide gradually melts. The lubricity of beeswax facilitates the migration of nano-silver powder and chitosan micro powder in the adhesive layer, thereby achieving uniform dispersion of nano-silver powder and chitosan powder in the adhesive layer. Combined with the bonding effect of TPU, the bonding effect of nano-silver powder and chitosan micro powder with EVA and asphalt is improved, thus ensuring the strength and toughness of the waterproof membrane.

[0017] By utilizing the antibacterial and bactericidal effects of nano-silver powder, chitosan micro powder, and beeswax, it is easy to inhibit and prevent bacteria in the soil from affecting the bonding strength of the waterproof membrane at the joints. Even if bacteria enter the joints over time, the bactericidal effect of nano-silver powder and chitosan micro powder can prevent bacteria from penetrating the waterproof membrane, thus protecting the waterproof membrane from being affected by bacteria during use and giving it a longer service life.

[0018] The combination of chitosan micropowder, hydrogenated castor oil, and petroleum resin, when in contact, utilizes the amino and carboxyl groups of chitosan micropowder to combine with the hydroxyl groups in hydrogenated castor oil and the carboxyl groups in petroleum resin, which can further improve the bonding stability of the adhesive layer and the asphalt layer, resulting in higher bonding strength at the overlapping positions and less likelihood of unevenness, pores, or voids, thereby extending the service life of the waterproof membrane.

[0019] Preferably, the elastic filler is composed of silica gel particles and phenolic resin in a mass ratio of 1:0.2-0.5.

[0020] By adopting the above technical solution, silicone particles, phenolic resin, petroleum resin, hydrogenated castor oil, and membrane-coated open-cell filler are combined. The silicone particles serve as elastic support, and the hydroxyl and carboxyl groups in the phenolic resin facilitate connection with the petroleum resin, hydrogenated castor oil, and membrane-coated open-cell filler, thereby improving the structural density of the waterproof membrane and giving it both high strength and good toughness.

[0021] During the compaction process of waterproof membrane, the silicone particles utilize their good elasticity and resilience to buffer the rigid pressure generated by the phenolic resin. Since the phenolic resin has high rigidity and poor flexibility, the elastic deformation of the silicone particles during the compaction process can provide space for the phenolic resin to undergo extrusion deformation, giving the waterproof membrane both high strength and good flexibility.

[0022] Preferably, the compatibilizer is maleic anhydride-grafted EVA.

[0023] By adopting the above technical solutions, the structure of the waterproof membrane is made denser, thereby improving the strength and toughness of the waterproof membrane.

[0024] Preferably, the anti-aging agent is antioxidant 1010.

[0025] By adopting the above technical solutions, the anti-aging properties of waterproof membranes can be improved.

[0026] Secondly, this application provides a method for preparing an acid and alkali resistant elastomer modified bitumen waterproof membrane, using the following technical solution:

[0027] A method for preparing an acid and alkali resistant elastomer modified bitumen waterproof membrane includes the following steps:

[0028] S1, asphalt, styrene-butadiene rubber, softening oil, polyethersulfone resin, petroleum resin, elastic filler, compatibilizer, and anti-aging agent are mixed and heated and stirred to obtain asphalt material;

[0029] S2. Apply asphalt material evenly to the base surface and allow it to dry to form an asphalt layer.

[0030] S3. Weigh EVA, hydrogenated castor oil, and coated open-cell filler, mix them, and then heat and stir to obtain the binder.

[0031] S4. Apply adhesive evenly to the surface of the asphalt layer away from the base layer. The adhesive dries to form an adhesive layer, resulting in the finished waterproof membrane.

[0032] By adopting the above technical solutions, the waterproof membrane has good elasticity and high strength. Furthermore, after the waterproof membrane is heated and laid, during the rolling process, the bonding stability at the overlapping positions of the waterproof membrane is good, and the problem of water leakage at the overlapping positions is not likely to occur.

[0033] Preferably, the elastic filler is prepared by the following method:

[0034] Weigh out silica gel granules and phenolic resin, mix and stir evenly, heat to 100-110℃, continue stirring, dry and disperse until the silica gel granules do not stick together and agglomerate, to obtain the finished product.

[0035] By adopting the above technical solution, the silicone particles and phenolic resin are mixed and then heated to facilitate uniform mixing of the silicone particles and phenolic resin, thereby achieving the adhesion of phenolic resin to the surface of the silicone particles.

[0036] Preferably, the membrane-coated open-pore filler is prepared by the following method:

[0037] Weigh out porous perlite and disperse it in hydroxyl silicone oil. Then filter out the porous perlite, spray bactericide evenly on the surface, then spray hot-melt rosin glycerol ester evenly on the surface, and dry it to obtain the finished product.

[0038] By adopting the above technical solution, the porous structure of multi-porous perlite is used to adsorb hydroxyl silicone oil. The hydrophobicity of hydroxyl silicone oil makes the pores of multi-porous perlite hydrophobic, so that it is not easy to absorb water and affect the waterproof performance of the waterproof membrane. Then, the partial adhesiveness of hydroxyl silicone oil is used to make the bactericide adhere to the surface of multi-porous perlite. Finally, hot-melt rosin glycerol ester is sprayed to facilitate the sealing of the bactericide on the surface of multi-porous perlite.

[0039] Preferably, the bactericide is prepared by the following method:

[0040] Weigh out nano silver powder and mix it with some TPU microparticles until uniform. Weigh out chitosan micro powder and mix it with the remaining TPU microparticles until uniform. Heat both to 100-120℃ and stir. Then add beeswax separately, mix them evenly, and then disperse and mix them to obtain the finished bactericide.

[0041] By adopting the above technical solution, TPU is loaded onto the surface of both nano-silver powder and chitosan micropowder. This allows for easy mixing in the microparticle state. Then, the mixture is heated to the melting point of TPU, utilizing its thermal fusion properties to facilitate adhesion to the surfaces of the nano-silver powder and chitosan micropowder. This improves the bonding effect between the nano-silver powder, chitosan micropowder, and other raw materials during the preparation of the waterproof membrane. Finally, beeswax microparticles are added. Utilizing the thermal fusion lubrication effect of beeswax, after the rosin glycerol esters are broken down and release bactericides, the beeswax flows and carries the nano-silver powder and chitosan micropowder evenly, thereby improving the antibacterial and bactericidal effects of the waterproof membrane. When the waterproof membrane is applied to underground environments such as basements, it is less susceptible to corrosion by bacteria in the soil, thus giving the waterproof membrane a longer service life.

[0042] In summary, this application has the following beneficial effects:

[0043] 1. By utilizing the filling effect of polyethersulfone resin, petroleum resin, and elastic fillers, the asphalt layer has both high elasticity and high strength, and good cross-linking effect, which can further improve the structural density of the asphalt layer, thereby further ensuring the strength and elasticity of the asphalt layer; at the same time, EVA in the bonding layer has good elasticity, and the combination of hydrogenated castor oil and softening oil can further improve the bonding effect and flexibility of the bonding layer and the asphalt layer, thus giving the waterproof membrane good strength and good flexibility.

[0044] 2. The combination of porous perlite, hydroxyl silicone oil, bactericide, and rosin glycerol ester creates a membrane layer that is easily broken under pressure. The bactericide is gradually exposed and dispersed relatively evenly. The bactericide can prevent bacteria in the soil from entering the interior of the waterproof membrane through the overlapping joints, thus ensuring the adhesion stability of the waterproof membrane.

[0045] 3. The combination of chitosan micro powder, hydrogenated castor oil, and petroleum resin, when these three come into contact, utilizes the amino and carboxyl groups of chitosan micro powder to combine with the hydroxyl groups in hydrogenated castor oil and the carboxyl groups in petroleum resin, which can further improve the bonding stability of the adhesive layer and the asphalt layer, resulting in higher bonding strength at the overlapping positions and less likelihood of unevenness, pores, or voids, thereby extending the service life of the waterproof membrane. Detailed Implementation

[0046] The present application will be further described in detail below with reference to the embodiments.

[0047] Preparation example of bactericide

[0048] Preparation Example 1: The bactericide was prepared by the following method:

[0049] 100g of nano-silver powder and 10g of TPU microparticles were weighed and mixed. The nano-silver powder had a particle size of 100nm, and the TPU microparticles had a particle size of 2μm. The nano-silver powder was added to the TPU microparticles at a rate of 50g / min. During the addition process, the TPU microparticles were stirred at a speed of 300r / min until uniformly mixed. The mixture was then heated to 110℃ and stirred continuously. Then, 20g of propolis was added and mixed evenly. The propolis had a particle size of 3μm. After dispersing, the nano-silver powder bactericide was obtained. 250g of chitosan was weighed... Chitosan micropowder was mixed and stirred evenly with 30g of TPU microparticles. The particle size of both chitosan micropowder and TPU microparticles was 3μm. The TPU microparticles were added at a rate of 50g / min. During the addition process, the chitosan micropowder was stirred at a speed of 300r / min. The temperature was raised to 110℃ and stirring was continued. Then, 40g of propolis was added and mixed evenly. The particle size of the propolis was 3μm. After being dispersed, it was mixed with nano silver powder bactericide to obtain the finished bactericide. The particle size of the finished bactericide was less than 10μm.

[0050] Preparation Example 2: The difference between this preparation example and Preparation Example 1 is that:

[0051] Weigh 100g of nano-silver powder and mix it with 5g of TPU microparticles. The nano-silver powder has a particle size of 100nm, and the TPU microparticles have a particle size of 2μm. The nano-silver powder is added to the TPU microparticles at a rate of 50g / min. During the addition process, the TPU microparticles are stirred at a speed of 300r / min until uniformly mixed. The mixture is then heated to 110℃ and stirred continuously. Next, 10g of propolis is added and mixed evenly. The propolis has a particle size of 3μm. After dispersing, a nano-silver powder bactericide is obtained. Weigh... 100g of chitosan micropowder and 15g of TPU microparticles were mixed and stirred evenly. The particle size of both chitosan micropowder and TPU microparticles was 3μm. The TPU microparticles were added at a rate of 50g / min. During the addition process, the chitosan micropowder was stirred at a speed of 300r / min. The temperature was raised to 110℃ and stirring was continued. Then, 30g of propolis was added and mixed evenly. The particle size of the propolis was 3μm. After being dispersed, it was mixed with nano silver powder bactericide to obtain the finished bactericide.

[0052] Preparation Example 3: The difference between this preparation example and Preparation Example 1 is that:

[0053] 100g of nano-silver powder and 20g of TPU microparticles were weighed and mixed. The nano-silver powder had a particle size of 100nm, and the TPU microparticles had a particle size of 2μm. The nano-silver powder was added to the TPU microparticles at a rate of 50g / min, and the TPU microparticles were stirred at 300r / min during the addition process until uniformly mixed. The mixture was then heated to 110℃ and stirred continuously. Next, 30g of propolis was added and mixed thoroughly. The propolis had a particle size of 3μm. After dispersing, the nano-silver powder bactericide was obtained. Take 400g of chitosan micro powder and 40g of TPU microparticles and mix them evenly. The particle size of chitosan micro powder is 3μm and the particle size of TPU microparticles is 3μm. The TPU microparticles are added at a rate of 50g / min. During the addition process, the chitosan micro powder is stirred at a speed of 300r / min. The temperature is raised to 110℃ and stirring is continued. Then, 50g of propolis is added and mixed evenly. The particle size of propolis is 3μm. After being dispersed, it is mixed with nano silver powder bactericide to obtain the finished bactericide.

[0054] Preparation example of membrane-coated open-pore packing

[0055] The following raw materials include: low-viscosity hydroxyl silicone oil purchased from Hubei Longsheng Sihai New Materials Co., Ltd., with a hydroxyl content of 6%; medium-viscosity hydroxyl silicone oil with a hydroxyl content of 12%; rosin glycerol ester purchased from Hubei Dongcao Chemical Technology Co., Ltd., with a melting point of 248-250℃; and other raw materials and equipment, which are commercially available.

[0056] Preparation Example 4: The coated open-pore filler was prepared by the following method:

[0057] 1 kg of porous perlite was weighed and soaked in 10 kg of low-viscosity hydroxyl silicone oil. The porous perlite had a particle size of 40 μm and a porosity of 50%. It was dispersed at 20 kHz for 15 min, and then the porous perlite was filtered out. 0.1 kg of medium-viscosity hydroxyl silicone oil was then sprayed evenly on the surface. 0.3 kg of the bactericide prepared in Preparation Example 1 was then sprayed evenly on the surface of the porous perlite. Finally, 0.5 kg of hot-melt rosin glycerol ester was sprayed evenly. The rosin glycerol ester was heated to 250 °C and melted. After drying and dispersing, the finished product was obtained and passed through a 200-mesh sieve.

[0058] Preparation Example 5: The difference between this preparation example and Preparation Example 4 is that;

[0059] 1 kg of porous perlite was weighed and soaked in 10 kg of low-viscosity hydroxyl silicone oil. The porous perlite had a particle size of 40 μm and a porosity of 50%. It was dispersed at 20 kHz for 15 min, and then filtered out. 0.1 kg of medium-viscosity hydroxyl silicone oil was then sprayed evenly on the surface. 0.2 kg of the bactericide prepared in Preparation Example 2 was then sprayed evenly on the surface of the porous perlite. Finally, 0.4 kg of hot-melt rosin glycerol ester was sprayed evenly. The rosin glycerol ester was heated to 250 °C to melt. After drying and dispersing, the finished product was obtained.

[0060] Preparation Example 6: The difference between this preparation example and Preparation Example 4 is that;

[0061] 1 kg of porous perlite was weighed and soaked in 10 kg of low-viscosity hydroxyl silicone oil. The porous perlite had a particle size of 40 μm and a porosity of 50%. It was dispersed at 20 kHz for 15 min, and then the porous perlite was filtered out. 0.1 kg of medium-viscosity hydroxyl silicone oil was then sprayed evenly on the surface. 0.4 kg of the bactericide prepared in Preparation Example 3 was then sprayed evenly on the surface of the porous perlite. Finally, 0.7 kg of hot-melt rosin glycerol ester was sprayed evenly. The rosin glycerol ester was heated to 250 °C to melt. After drying and dispersing, the finished product was obtained.

[0062] Example of preparation of elastic filler

[0063] The phenolic resin in the following raw materials was purchased from Shandong Guohua Chemical Co., Ltd., with a melting point of 94℃; the other raw materials and equipment are all commercially available and can be ground to the required particle size.

[0064] Preparation Example 7: The elastic filler was prepared by the following method:

[0065] Weigh 1 kg of silica gel granules and 0.4 kg of phenolic resin and mix them. Stir the mixture evenly at a speed of 500 r / min. The particle size of the silica gel granules is 80 μm and the particle size of the phenolic resin is 20 μm. Heat the mixture to 100℃ until the phenolic resin is completely melted. Continue stirring. After drying and breaking up the mixture until the silica gel granules do not stick together or agglomerate, the finished product is obtained.

[0066] Preparation Example 8: The elastic filler was prepared by the following method:

[0067] Weigh 1 kg of silica gel granules and 0.2 kg of phenolic resin and mix them. Stir the mixture evenly at a speed of 500 r / min. The particle size of the silica gel granules is 80 μm and the particle size of the phenolic resin is 20 μm. Heat the mixture to 100℃ until the phenolic resin is completely melted. Continue stirring, and then dry and break it up until the silica gel granules no longer stick together and agglomerate to obtain the finished product.

[0068] Preparation Example 9: The elastic filler was prepared by the following method:

[0069] Weigh 1 kg of silica gel granules and 0.5 kg of phenolic resin and mix them. Stir the mixture evenly at a speed of 500 r / min. The particle size of the silica gel granules is 80 μm and the particle size of the phenolic resin is 20 μm. Heat the mixture to 100℃ until the phenolic resin is completely melted. Continue stirring, and then dry and break it up until the silica gel granules no longer stick together and agglomerate to obtain the finished product.

[0070] Example

[0071] The following raw materials were purchased: polyester fiber nonwoven fabric from Zhengzhou Rongtong Engineering Materials Technology Co., Ltd.; softening oil from Alpha (Jiangyin) Asphalt Co., Ltd. with a content of 95%; polyethersulfone resin from Dongguan Youtai Engineering Plastics Co., Ltd. with a heat distortion temperature of 205℃; and other raw materials and equipment were all commercially available.

[0072] Example 1: An acid and alkali resistant elastomer modified bitumen waterproof membrane:

[0073] It includes a base layer, an asphalt layer, and an adhesive layer; the base layer is made of polyester fiber non-woven fabric.

[0074] The asphalt layer contains: 90 kg asphalt, 5 kg styrene-butadiene rubber, 3 kg softening oil, 2 kg polyethersulfone resin, 2 kg petroleum resin, 4 kg elastic filler, 2 kg compatibilizer, and 2 kg anti-aging agent; the asphalt is 90# petroleum asphalt, and the petroleum resin is C5 petroleum resin; the elastic filler is the elastic filler prepared in Preparation Example 7, the compatibilizer is maleic anhydride-grafted EVA, and the anti-aging agent is antioxidant 1010;

[0075] The adhesive layer comprises the following raw materials in parts by weight: 90 kg of EVA, 5 kg of hydrogenated castor oil, and 5 kg of coated open-cell filler; the EVA has a melting point of 85°C; the coated open-cell filler is the coated open-cell filler prepared in Preparation Example 4.

[0076] The preparation method is as follows:

[0077] After S1, asphalt, styrene-butadiene rubber, and softening oil are mixed evenly, the mixture is heated to 160°C and stirred for 1 hour. Then, polyethersulfone resin, petroleum resin, elastic filler, compatibilizer, and anti-aging agent are added, the mixture is heated to 210°C, and stirred for 2.5 hours to obtain asphalt material.

[0078] S2. Apply asphalt material evenly to the base surface and let it dry to form an asphalt layer with a thickness of 2mm.

[0079] S3. Weigh and mix EVA, hydrogenated castor oil, and coating open-cell filler, heat to 100℃, and stir to obtain adhesive; S4. Apply adhesive evenly to the surface of the asphalt layer away from the base layer, let the adhesive dry to form an adhesive layer with a thickness of 1mm, and obtain the finished waterproof membrane.

[0080] Example 2: The difference between this example and Example 1 is that:

[0081] The asphalt layer contains: 80 kg asphalt, 2 kg styrene-butadiene rubber, 1 kg softening oil, 1 kg polyethersulfone resin, 1 kg petroleum resin, 1 kg elastic filler, 1 kg compatibilizer, and 1 kg anti-aging agent; the asphalt is 90# petroleum asphalt, and the petroleum resin is C5 petroleum resin; the elastic filler is the elastic filler prepared in Preparation Example 8, the compatibilizer is maleic anhydride-grafted EVA, and the anti-aging agent is antioxidant 1010;

[0082] The adhesive layer comprises the following raw materials in parts by weight: 70 kg of EVA, 2 kg of hydrogenated castor oil, and 2 kg of coated open-cell filler; the EVA has a melting point of 85°C; the coated open-cell filler is the coated open-cell filler prepared in Preparation Example 5.

[0083] Example 3: The difference between this example and Example 1 is that:

[0084] The asphalt layer contains: 100 kg asphalt, 8 kg styrene-butadiene rubber, 5 kg softening oil, 4 kg polyethersulfone resin, 4 kg petroleum resin, 6 kg elastic filler, 3 kg compatibilizer, and 3 kg anti-aging agent; the asphalt is 90# petroleum asphalt, and the petroleum resin is C5 petroleum resin; the elastic filler is the elastic filler prepared in Preparation Example 9, the compatibilizer is maleic anhydride-grafted EVA, and the anti-aging agent is antioxidant 1010;

[0085] The adhesive layer comprises the following raw materials in parts by weight: 100 kg of EVA, 8 kg of hydrogenated castor oil, and 7 kg of coated open-cell filler; the EVA has a melting point of 85°C; the coated open-cell filler is the coated open-cell filler prepared in Preparation Example 6.

[0086] Example 4: The difference between this example and Example 1 is that:

[0087] No rosin glycerol ester was added during the preparation of the coated open-pore filler.

[0088] Example 5: The difference between this example and Example 1 is that:

[0089] No bactericide was added during the preparation of the membrane-coated open-pore packing.

[0090] Example 6: The difference between this example and Example 1 is that:

[0091] The bactericide is nano silver powder.

[0092] Example 7: The difference between this example and Example 1 is that:

[0093] In bactericides, beeswax is replaced with an equal mass of rosin glycerol ester.

[0094] Example 8: The difference between this example and Example 1 is that:

[0095] The elastic filler is silica gel particles.

[0096] Comparative Example

[0097] Comparative Example 1: The difference between this comparative example and Example 1 is that:

[0098] No petroleum resin, polyethersulfone resin, or elastic filler was added to the asphalt layer raw material.

[0099] Comparative Example 2: This comparative example differs from Example 1 in that:

[0100] No hydrogenated castor oil or encapsulated open-cell filler was added to the adhesive layer.

[0101] Performance testing

[0102] 1. Peel strength test

[0103] Finished bituminous waterproof membranes were prepared using the methods described in Examples 1-8 and Comparative Examples 1-2, respectively. The bituminous waterproof membranes were laid on the basement substrate. Before laying, the adhesive layer of the bituminous waterproof membrane was heated and melted, then bonded to the substrate. The overlap width between two adjacent bituminous waterproof membranes was 8 cm. After bonding, compaction was performed using a calendering roller with a pressure of 75 N / cm. 2 Refer to GB18242-2008 to test the peel strength at the overlapping positions and record the data.

[0104] 2. Flexible testing

[0105] Finished bituminous waterproof membranes were prepared using the preparation methods of Examples 1-3 and Comparative Examples 1-2, respectively. The elongation rate was tested and the data were recorded in accordance with GB18242-2008.

[0106] 3. Stability testing

[0107] Finished bituminous waterproof membranes were prepared using the preparation methods of Examples 1-3 and Comparative Examples 1-2, respectively. The tensile strength was tested and the data were recorded in accordance with GB18242-2008.

[0108] 4. Corrosion resistance test

[0109] Finished bituminous waterproof membranes were prepared using the preparation methods of Examples 1-8 and Comparative Examples 1-2, respectively. After the bituminous waterproof membranes were adhered to the substrate surface, they were buried in the soil. After 180 days, the bituminous waterproof membranes were taken out, and the peel strength at the overlapping positions was tested again.

[0110] Table 1 Performance Test Table

[0111]

[0112]

[0113] As can be seen from Examples 1-3 and Table 1, the finished waterproof membrane prepared in this application has high strength and good toughness, as well as good corrosion resistance in soil. The bonding stability at the overlapping parts of the waterproof membrane is good, and leakage is not easy to occur, thus giving the waterproof membrane a long service life.

[0114] Combining Examples 1 and 4-8 with Table 1, it can be seen that in the preparation process of the membrane-coated open-cell filler in Example 4, no rosin glycerol ester was added. Compared with Example 1, the peel strength of the waterproof membrane prepared in Example 4 was lower than that in Example 1, and the difference between the peel strength and the peel strength after corrosion was greater than the corresponding difference in Example 1. This indicates that the addition of rosin glycerol ester not only improves the internal bonding strength of the waterproof membrane, but also releases bactericides through compaction, inhibiting bacteria in the soil from entering the bonding area of ​​the waterproof membrane through the overlap, thus ensuring the service life of the waterproof membrane.

[0115] In Example 5, no bactericide was added during the preparation of the membrane-coated open-pore filler. Compared with Example 1, the peel strength of the waterproof membrane prepared in Example 5 was lower than that in Example 1, and the difference between the peel strength and the peel strength after corrosion was greater than the corresponding difference in Example 1. This indicates that the addition of bactericide can prevent bacteria from entering the waterproof membrane at the overlapping positions, thereby ensuring the bonding stability at the overlapping positions and extending the service life of the waterproof membrane in underground structures.

[0116] In Example 6, the bactericide was nano-silver powder. Compared to Example 1, the peel strength of the waterproof membrane prepared in Example 6 was lower than that in Example 1, and the difference between the peel strength and the peel strength after corrosion was greater than the corresponding difference in Example 1. This indicates that the combination of nano-silver powder, chitosan micropowder, TPU microparticles, and beeswax, utilizing the adhesive compatibility of beeswax and TPU, improves the adhesion effect of the bactericide with other raw materials, thereby increasing the peel strength. Furthermore, during the construction of the waterproof membrane, chitosan micropowder, TPU microparticles, and beeswax can further improve the bonding stability at the overlapping positions. At the same time, the synergistic antibacterial effect of nano-silver powder, chitosan micropowder, and beeswax can further protect the overlapping positions of the waterproof membrane from corrosion by bacteria in the soil.

[0117] In Example 7, the same mass of rosin glycerol ester was used to replace beeswax in the bactericide. Compared with Example 1, the difference between the peel strength and the peel strength after corrosion of the waterproof membrane prepared in Example 7 was greater than the corresponding difference in Example 1. This indicates that rosin glycerol ester has viscosity, while this application requires the lubricating effect of beeswax to promote the uniform dispersion of the antibacterial agent, thereby ensuring the uniform antibacterial effect of the waterproof membrane.

[0118] In Example 8, the elastic filler was silica gel particles. Compared to Example 1, the peel strength of the waterproof membrane prepared in Example 8 was lower than that in Example 1, and the difference between the peel strength and the peel strength after corrosion was greater than the corresponding difference in Example 1. This indicates that the combination of silica gel particles and petroleum resin can improve the compatibility and adhesion of the elastic filler in the asphalt material, thereby improving the peel strength of the waterproof membrane. Furthermore, petroleum resin has waterproof and water-repellent properties. If the silica gel particles are not treated with petroleum resin, the waterproof effect of the waterproof membrane may be affected.

[0119] Based on Example 1 and Comparative Examples 1-2, and referring to Table 1, it can be seen that the asphalt layer raw material of Comparative Example 1 did not contain petroleum resin, polyethersulfone resin, or elastic filler. Compared with Example 1, the peel strength of the waterproof membrane prepared in Comparative Example 1 was lower than that in Example 1, and the difference between the peel strength and the peel strength after corrosion was greater than the corresponding difference in Example 1. The elongation and tensile strength were also lower than those in Example 1. This indicates that the combination of petroleum resin, polyethersulfone resin, and elastic filler can improve the strength, toughness, and bonding stability of the waterproof membrane at the overlapping positions.

[0120] In Comparative Example 2, no hydrogenated castor oil or coated open-cell filler was added to the adhesive layer. Compared to Example 1, the waterproof membrane prepared in Comparative Example 2 had a lower peel strength than that in Example 1, and the difference between the peel strength and the peel strength after corrosion was greater than the corresponding difference in Example 1. The elongation and tensile strength were also lower than those in Example 1. This indicates that the combination of hydrogenated castor oil, coated open-cell filler, and asphalt material can improve the bonding effect between the asphalt layer and the adhesive layer, thereby improving the structural stability of the waterproof membrane.

[0121] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of this application.

Claims

1. An acid and alkali resistant elastomer modified bitumen waterproof membrane, characterized in that, Includes base layer, asphalt layer, and bonding layer; The asphalt layer contains the following raw materials in parts by weight: 80-100 parts asphalt, 2-8 parts styrene-butadiene rubber, 1-5 parts softening oil, 1-4 parts polyethersulfone resin, 1-4 parts petroleum resin, 1-6 parts elastic filler, 1-3 parts compatibilizer, and 1-3 parts anti-aging agent. The adhesive layer contains the following raw materials in parts by weight: 70-100 parts EVA, 2-8 parts hydrogenated castor oil, and 2-7 parts coated open-cell filler; the coated open-cell filler is prepared by modifying multi-porous perlite with hydroxyl silicone oil and then loading bactericide and rosin glycerol ester in sequence. The mass ratio of porous perlite to bactericide is 1:0.2-0.4, and the mass ratio of porous perlite to rosin glycerol ester is 1:0.4-0.7; the bactericide is composed of nano silver powder, chitosan micro powder, TPU microparticles and beeswax in a mass ratio of 1:1-4:0.2-0.6:0.4-0.

8. The elastic filler is prepared as follows: Weigh silica gel particles and phenolic resin at a mass ratio of 1:0.2-0.5, mix and stir evenly, heat to 100-110℃, continue stirring, dry and disperse until the silica gel particles do not stick together and agglomerate, and the finished product is obtained.

2. The acid and alkali resistant elastomer modified bitumen waterproof membrane according to claim 1, characterized in that, The compatibilizer is maleic anhydride-grafted EVA.

3. The acid and alkali resistant elastomer modified bitumen waterproof membrane according to claim 1, characterized in that, The anti-aging agent is antioxidant 1010.

4. A method for preparing an acid and alkali resistant elastomer modified bitumen waterproof membrane according to any one of claims 1-3, characterized in that, Includes the following steps: S1, asphalt, styrene-butadiene rubber, softening oil, polyethersulfone resin, petroleum resin, elastic filler, compatibilizer, and anti-aging agent are mixed and heated and stirred to obtain asphalt material; S2. Apply asphalt material evenly to the base surface and allow it to dry to form an asphalt layer. S3. Weigh EVA, hydrogenated castor oil, and coated open-cell filler, mix them, and then heat and stir to obtain the binder. S4. Apply adhesive evenly to the surface of the asphalt layer away from the base layer. The adhesive dries to form an adhesive layer, resulting in the finished waterproof membrane.

5. The method for preparing an acid and alkali resistant elastomer modified bitumen waterproof membrane according to claim 4, characterized in that, The coated open-pore filler is prepared by the following method: Weigh out porous perlite and disperse it in hydroxyl silicone oil. Then filter out the porous perlite, spray bactericide evenly on the surface, then spray hot-melt rosin glycerol ester evenly on the surface, and dry it to obtain the finished product.

6. The method for preparing an acid and alkali resistant elastomer modified bitumen waterproof membrane according to claim 5, characterized in that, The bactericide is prepared by the following method: Weigh out nano silver powder and mix it with some TPU microparticles until uniform. Weigh out chitosan micro powder and mix it with the remaining TPU microparticles until uniform. Heat both to 100-120℃ and stir. Then add beeswax separately, mix them evenly, and then disperse and mix them to obtain the finished bactericide.

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