Waterproof coiled material for building top surface and preparation method of waterproof coiled material

Abstract

The invention relates to the technical field of building materials, and discloses a waterproof coiled material for a building top surface and a preparation method thereof.The method comprises the steps that asphalt is modified through styrene-ethylene-propylene-styrene and silicate, and modified asphalt is obtained; impregnating a base material in the modified asphalt, and spreading an anti-sticking material on the surface of the impregnated base material to obtain a waterproof roll base material; and molding the waterproof coiled material base material to obtain the waterproof coiled material. By adopting the preparation method of the modified asphalt, the waterproof coiled material is endowed with excellent weather resistance and ageing resistance, so that the service life of the waterproof coiled material is greatly prolonged; the modified asphalt and the base material are excellently combined, so that the integral strength and stability of the waterproof coiled material are improved, the construction difficulty is effectively reduced, and the construction efficiency is remarkably improved.

Description

Technical Field

[0001] The invention relates to the technical field of building materials, and in particular to a waterproof coiled material for a building top surface and a preparation method thereof. Background Art

[0002] With the acceleration of urbanization, the waterproofing problem of building roofs has become increasingly prominent. Traditional waterproofing membranes often experience problems such as aging, cracking, and water seepage during long-term use, which seriously affects the service life and safety of buildings. Therefore, it is particularly important to develop a new, efficient, and durable waterproofing membrane.

[0003] At present, there are many kinds of waterproofing membranes on the market, such as asphalt waterproofing membranes, polymer waterproofing membranes, etc. However, these waterproofing membranes still have some shortcomings in performance, such as poor weather resistance, easy aging, and difficult construction. Therefore, it is necessary to improve and innovate the preparation method of waterproofing membranes to improve their waterproof performance and service life. Summary of the invention

[0004] In view of this, the present invention proposes a waterproof membrane for building roofs and a preparation method thereof, aiming to solve the problems of poor weather resistance, easy aging, and great construction difficulty of the existing waterproof membrane by improving the preparation method of the existing waterproof membrane, thereby improving the waterproof performance and service life of the waterproof membrane.

[0005] The present invention provides a method for preparing a waterproof roll material for a building top surface, comprising: Modifying asphalt with styrene-ethylene-propylene-styrene and silicate to obtain modified asphalt; The base material is immersed in the modified asphalt, and an anti-sticking material is spread on the surface of the immersed base material to obtain a waterproof coiled material substrate; The waterproof coiled material base material is molded to obtain the waterproof coiled material.

[0006] Preferably, when asphalt is modified by styrene-ethylene-propylene-styrene and silicate to obtain modified asphalt, the following steps are included: The modified asphalt is obtained by pretreating styrene-ethylene-propylene-styrene and silicate with an in-situ growth modifier, and mixing the pretreated styrene-ethylene-propylene-styrene and silicate with asphalt to make the modifier fully dispersed in the asphalt.

[0007] Preferably, the pretreatment of styrene-ethylene-propylene-styrene and silicate with an in-situ growth modifier comprises: The in-situ growth modifier is dissolved in an organic solvent, and then styrene-ethylene-propylene-styrene and silicate are added to carry out stirring reaction, so that the in-situ growth modifier is chemically bonded with the surface of styrene-ethylene-propylene-styrene and silicate; The reaction conditions are as follows: stirring at a temperature of 80-120° C. for no less than 2 hours.

[0008] Preferably, the organic solvent is tetrahydrofuran; and the in-situ growth modifier is chloromethyltriethoxysilane.

[0009] Preferably, the weight ratio of tetrahydrofuran to chloromethyltriethoxysilane is 1:1.1-1.35; The weight ratio of styrene-ethylene-propylene-styrene to silicate is 1.5-2:1; The weight ratio of the total weight of tetrahydrofuran and chloromethyltriethoxysilane to the total weight of styrene-ethylene-propylene-styrene and silicate is 1:2.8-3.2.

[0010] Preferably, the base tire material is pre-treated before being immersed in the modified asphalt; Wherein, the base material is polypropylene, and the pretreatment includes micro-etching the clean polypropylene with an acid solution and then performing low-temperature plasma treatment.

[0011] Preferably, the method of micro-etching the clean polypropylene with an acid solution and then performing low-temperature plasma treatment comprises: Soak the clean polypropylene in a dilute sulfuric acid solution with a concentration of 5%-6% for 10-20 minutes, then rinse with clean water and dry; then put the dried polypropylene into a low-temperature plasma equipment and perform plasma treatment for 5-10 minutes at a power of 50-100W and a gas flow of 10-30L / min.

[0012] Preferably, the method for preparing the anti-sticking material comprises: Dissolving poly (N-isopropylacrylamide) in deionized water and adding ammonium persulfate to obtain a PNIPAM solution; The glass microbeads are immersed in a PNIPAM solution for stirring reaction, and after the reaction is completed, they are washed with water and dried to obtain basic glass microbeads; The perfluorooctyl triethoxysilane solution is sprayed on the surface of the basic glass microbeads, and then subjected to ultraviolet curing treatment after drying to obtain the anti-sticking material.

[0013] Preferably, perfluorooctyltriethoxysilane and anhydrous ethanol are prepared in a mass ratio of 0.5-1:100 to obtain the perfluorooctyltriethoxysilane solution.

[0014] Preferably, the glass microspheres are hollow glass microspheres.

[0015] Preferably, the particle size of the glass microbeads is 100-180 μm.

[0016] Preferably, the ultraviolet curing treatment comprises: 100-300W / cm 2 A high-pressure mercury lamp is used as the light source, focused on the UVA area for irradiation, and the irradiation time is 5-10 minutes; the distance between the glass beads and the light source is 10-15cm, and the temperature during ultraviolet curing treatment does not exceed 80°C.

[0017] The present invention also proposes a waterproof coiled material for a building top surface, wherein the waterproof coiled material is prepared by the above-mentioned method for preparing the waterproof coiled material for a building top surface.

[0018] From a microscopic perspective, this method involves physical and chemical reactions on the surfaces of various materials and between molecules. The following is a detailed description of the principle mechanism of this method: 1. Surface modification mechanism of silane coupling agent Silane coupling agent (chloromethyl triethoxysilane) plays a vital role in the preparation of waterproof membranes, especially in the surface modification of styrene-ethylene-propylene-styrene (SEBS) and silicates. Its surface modification mechanism is mainly based on the following aspects: Chemical bonding: The siloxane group (Si-OC) in chloromethyl triethoxysilane can undergo hydrolysis and condensation reaction with the hydroxyl group (OH-) or other active groups on the surface of SEBS and silicate to form a stable Si-O-Si bond. This chemical bonding significantly improves the compatibility and bonding force between SEBS and silicate and asphalt, allowing the modified asphalt to better adhere to the base material and improve the overall performance of the waterproof membrane.

[0019] Reduced interfacial tension: Silane coupling agents can reduce the interfacial tension between SEBS, silicate and asphalt, making their contact closer and reducing the generation of voids and bubbles. This close contact not only enhances the mechanical properties of the waterproof membrane, but also improves its waterproof effect.

[0020] Steric hindrance effect: Silane coupling agent forms a protective film on the surface of SEBS and silicate, and provides steric hindrance through the long-chain alkyl or aromatic group in its molecular structure, preventing asphalt molecules from aggregating or seeping out due to thermal movement during long-term use. This helps maintain the stability and durability of the waterproof membrane.

[0021] Enhanced compatibility: The introduction of chloromethyl triethoxysilane improves the dispersibility of SEBS and silicate in asphalt, allowing them to be more evenly distributed in the asphalt to form a stable modified system. This uniform dispersion helps to improve the mechanical properties and waterproof properties of the waterproof membrane.

[0022] Improve weather resistance: Silane coupling agents have certain anti-aging properties and can slow down the aging process of SEBS, silicates and asphalt under the influence of environmental factors such as ultraviolet rays and oxygen. This helps to extend the service life of waterproof membranes and improve their weather resistance.

[0023] In summary, the silane coupling agent significantly improves the performance of the waterproof membrane through various mechanisms such as chemical bonding, reducing interfacial tension, providing steric hindrance, enhancing compatibility and improving weather resistance during the preparation process of the waterproof membrane. The synergistic effect of these mechanisms makes the waterproof membrane of the present invention have a wide range of application prospects in occasions such as building roofs that require high waterproof performance.

[0024] 2. Surface treatment mechanism of polypropylene substrate The surface treatment mechanism of polypropylene substrate is also important in the preparation of waterproof membrane. The treatment process is aimed at improving the bond strength and durability between the substrate and modified asphalt. The following is a breakdown of the surface treatment mechanism of polypropylene substrate: (1) Micro-corrosion Chemical etching: Use dilute sulfuric acid solution to micro-etch the surface of polypropylene. The main purpose of this step is to form a tiny roughness on the surface of polypropylene and increase some active sites (such as hydroxyl, carboxyl, etc.). These roughness and active sites help the modified asphalt to better penetrate and adhere to the substrate, thereby improving the bonding strength.

[0025] Control concentration and time: The concentration and immersion time of dilute sulfuric acid need to be precisely controlled to avoid excessive corrosion and weakening of the substrate strength. Usually, a 5%-6% dilute sulfuric acid concentration and 10-20 minutes of immersion time can achieve the ideal micro-corrosion effect.

[0026] (2) Low temperature plasma treatment Physical modification: Low-temperature plasma treatment is an efficient surface modification technology that can introduce polar groups on the surface of polypropylene, increase surface energy and change surface morphology. These changes significantly enhance the interaction between polypropylene and modified asphalt.

[0027] Activated surface: High-energy particles in the plasma (such as electrons, ions and free radicals) bombard the surface of polypropylene, breaking its molecular chains and generating free radicals and active sites. These active sites react with polar groups in the modified asphalt to form strong chemical bonds.

[0028] Control conditions: Parameters such as plasma treatment power, gas flow rate and treatment time need to be optimized to ensure the best surface modification effect without affecting the performance of the substrate itself.

[0029] In summary, the surface treatment mechanism of the polypropylene substrate effectively improves the bonding performance and durability between the substrate and the modified asphalt through the combination of micro-corrosion and low-temperature plasma treatment. These mechanisms work together to enable the waterproof membrane to maintain stable and reliable waterproof performance in a complex and changeable natural environment.

[0030] 3. Combination mechanism of modified asphalt and polypropylene In the bonding process of modified asphalt and polypropylene substrate, multiple mechanisms work together to achieve excellent bonding performance and durability. The following is a detailed analysis of this bonding mechanism: (1) Intermolecular interactions Hydrogen bonding: The polar groups (such as hydroxyl, carboxyl, etc.) in the modified asphalt can form hydrogen bonds with the polar groups (such as carboxyl, hydroxyl, etc.) introduced into the polypropylene substrate after treatment. Hydrogen bonding is a strong intermolecular force that helps to enhance the bonding strength between asphalt and the substrate.

[0031] Van der Waals force: In addition to hydrogen bonds, there are also van der Waals forces between modified asphalt molecules and polypropylene molecules. Although van der Waals forces are relatively weak, they can also make a significant contribution to the overall bonding strength when accumulated between a large number of molecules.

[0032] (2) Physical interlock Roughness effect: After the polypropylene substrate is micro-corroded, a tiny roughness is formed on the surface. These rough structures can serve as "anchor points" for the modified asphalt to be embedded in during the curing process, forming a physical interlocking structure. This interlocking structure can significantly improve the mechanical bite force between the asphalt and the substrate and enhance the bonding strength.

[0033] Penetration: When the modified asphalt is applied to the polypropylene substrate, it can penetrate into the tiny pores and cracks on the surface of the substrate. As the asphalt solidifies, these pores and cracks are filled, further enhancing the bonding between the asphalt and the substrate.

[0034] (3) Chemical bonding Copolymerization: In some cases, certain components in the modified asphalt copolymerize with the active groups on the surface of the polypropylene substrate to form covalent bonds. This chemical bonding is stronger than hydrogen bonds and van der Waals forces and can provide a more stable bonding interface.

[0035] (4) Interface compatibility Function of surfactant: Adding an appropriate amount of surfactant to modified asphalt can improve the interfacial compatibility between asphalt and polypropylene substrate. Surfactants can reduce interfacial tension, making asphalt easier to wet and spread on the substrate surface, thereby improving the bonding effect.

[0036] In summary, the bonding mechanism between modified asphalt and polypropylene substrate involves multiple aspects such as intermolecular interaction, physical interlocking, chemical bonding, and interfacial compatibility. These mechanisms work together to enable the waterproof membrane to maintain excellent bonding performance and durability in a complex and changing natural environment.

[0037] 4. Mechanism of action of anti-sticking materials Phase transition properties of PNIPAM polymer: Poly (N-isopropylacrylamide) (PNIPAM) is temperature-sensitive. When the temperature is below its phase transition temperature (about 32°C), its chain segments will absorb water and become hydrophilic; when the temperature is above the phase transition temperature, the chain segments will repel water and become hydrophobic. This amphiphilicity can prevent material adhesion under different environmental conditions and provide good self-cleaning ability on the surface of the coil.

[0038] Hydrophobicity of perfluorooctyl triethoxysilane: Perfluorooctyl triethoxysilane has a long-chain fluorinated carbon structure, which gives the material extremely strong hydrophobicity and low surface energy. After spraying on the surface of glass beads, a nano-scale hydrophobic film is formed, which not only reduces the surface energy but also increases the anti-sticking effect. After UV curing, the chemical bonding between silane and the substrate is further enhanced to enhance the stability of the film layer.

[0039] 5. UV curing mechanism Chemical cross-linking reaction: The high-pressure mercury lamp in the UV curing process irradiates in the UVA region, and the energy is sufficient to excite the functional groups in perfluorooctyl triethoxysilane, causing it to undergo free radical reaction or cationic cross-linking reaction, thereby forming a stable chemical cross-linking structure on the surface of the material. This cross-linking network not only improves the durability of the anti-stick coating, but also enhances its UV resistance and weather resistance.

[0040] 6. Surface modification mechanism of glass microspheres Physical enhancement: Through the modification of PNIPAM and perfluorooctyl triethoxysilane, a coating with hydrophilic and hydrophobic properties is formed on the surface of the glass microspheres. This coating can play a physical isolation role on the surface of the coil, further prevent adhesion between coils, and improve construction efficiency.

[0041] Compared with the prior art, the present invention has the following beneficial effects: The present invention makes the waterproof coiled material have more excellent weather resistance and anti-aging performance through the preparation of modified asphalt, and significantly prolongs the service life. The good combination of the modified asphalt and the base material improves the overall strength and stability of the waterproof coiled material, reduces the construction difficulty, and enhances the construction efficiency. In addition, the use of anti-sticking materials further improves the anti-sticking property of the waterproof coiled material, effectively prevents the adhesion problem during the construction process, and ensures the construction quality and aesthetics. In summary, the waterproof coiled material preparation method of the present invention shows significant advantages in improving waterproof performance, prolonging service life, simplifying construction process, etc., and has broad application prospects and market value. DETAILED DESCRIPTION

[0042] The exemplary embodiments of the present disclosure will be described in more detail below. Although the exemplary embodiments of the present disclosure are shown below, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to be able to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below in conjunction with the embodiments. Example 1

[0043] Styrene-ethylene-propylene-styrene and montmorillonite are mixed at a weight ratio of 1.5:1, and then chloromethyl triethoxysilane is dissolved in tetrahydrofuran at a weight ratio of 1:1.2. The mixed styrene-ethylene-propylene-styrene and silicate are added to the tetrahydrofuran solution of chloromethyl triethoxysilane, and the mixture is stirred and reacted at a temperature of 80°C for 3 hours to chemically bond the chloromethyl triethoxysilane to the surfaces of styrene-ethylene-propylene-styrene and silicate, thereby obtaining a pretreated mixture.

[0044] Polypropylene was used as the base material and was immersed in a 5% dilute sulfuric acid solution for 15 minutes for micro-etching, then rinsed with water and dried. The dried polypropylene was placed in a low-temperature plasma device and subjected to plasma treatment for 8 minutes at a power of 80W and a gas flow of 20L / min.

[0045] The treated polypropylene-based tire material is immersed in modified asphalt to ensure that the base tire material fully absorbs the modified asphalt. After that, a layer of anti-sticking material modified by poly N-isopropyl acrylamide and perfluorooctyl triethoxysilane is coated on the upper and lower surfaces of the base tire material respectively. The poly N-isopropyl acrylamide solution is prepared by dissolving poly N-isopropyl acrylamide in deionized water and adding an appropriate amount of ammonium persulfate. The perfluorooctyl triethoxysilane solution is prepared by mixing perfluorooctyl triethoxysilane and anhydrous ethanol in a mass ratio of 0.75:100. The glass microbeads (hollow glass microbeads of 100-180μm) are immersed in the poly N-isopropyl acrylamide solution for stirring reaction. After the reaction is completed, they are washed with water and dried. Then the perfluorooctyl triethoxysilane solution is sprayed on the surface of the dried glass microbeads and ultraviolet curing is performed to obtain the anti-sticking material. The ultraviolet curing treatment uses 150W / cm 2 A high-pressure mercury lamp was focused on the UVA area for irradiation for 7 minutes. The distance between the glass beads and the light source was 12 cm and the temperature was controlled below 70°C.

[0046] After the above steps, a building roof waterproofing membrane with excellent waterproof performance and weather resistance was prepared. The membrane was pretreated with styrene-ethylene-propylene-styrene and silicate by in-situ growth modifiers to improve the compatibility and bonding strength with asphalt; at the same time, the polypropylene-based base material was treated with micro-corrosion and low-temperature plasma to enhance the bonding strength with modified asphalt; and the introduction of anti-sticking materials effectively prevented the adhesion between the membranes, improving the construction efficiency and durability of the membranes. Example 2

[0047] Compared with Example 1, this example adjusts some parameters in the preparation process to explore the effects of different conditions on the performance of the waterproof membrane. The specific steps are as follows: First, styrene-ethylene-propylene-styrene and montmorillonite were mixed at a weight ratio of 1.2:1, and then chloromethyltriethoxysilane was dissolved in tetrahydrofuran at a weight ratio of 1:1. The following steps were similar to those in Example 1, that is, the mixed styrene-ethylene-propylene-styrene and silicate were added to the tetrahydrofuran solution of chloromethyltriethoxysilane, and the mixture was stirred and reacted at a temperature of 75°C for 2.5 hours to obtain a pretreated mixture.

[0048] For the treatment of the base tire material, this embodiment still selects polypropylene as the base tire material, and soaks it in a 4% dilute hydrochloric acid solution for 12 minutes for micro-etching treatment. After the treatment, rinse it with clean water and dry it. Then, put the dried polyethylene base tire material into the low-temperature plasma equipment and perform plasma treatment for 7 minutes under the conditions of 70W power and 18L / min gas flow.

[0049] In the modified asphalt impregnation and anti-sticking material coating steps, we used the same method as in Example 1, but adjusted the preparation ratio of the poly (N-isopropylacrylamide) solution and the perfluorooctyl triethoxysilane solution. The ammonium persulfate content in the poly (N-isopropylacrylamide) solution was slightly increased to enhance the activity of the polymerization reaction. The mass ratio of perfluorooctyl triethoxysilane to anhydrous ethanol was adjusted to 0.6:100 to optimize the performance of the anti-sticking material.

[0050] During the UV curing process, we used 200W / cm 2 The high-pressure mercury lamp is focused on the UVA area for 6 minutes. The distance between the glass beads and the light source is kept at 10 cm, and the temperature is strictly controlled not to exceed 75°C to ensure the curing effect.

[0051] In order to better demonstrate the technical effect and innovation of the present invention, the present invention sets up five comparative example experiments.

[0052] Comparative Example 1 In order to verify the effect of SEP and montmorillonite pretreatment on the performance of waterproof membrane, the pretreatment step was omitted in this comparative example, and the untreated SEP and silicate were directly mixed with modified asphalt, and the subsequent steps were continued.

[0053] Comparative Example 2 In order to evaluate the importance of micro-etching treatment of polypropylene-based tire materials, this comparative example omitted the micro-etching treatment step of polypropylene, directly performed low-temperature plasma treatment, and continued with subsequent steps.

[0054] Comparative Example 3 In order to explore the effect of low-temperature plasma treatment on the performance of the base tire material, the low-temperature plasma treatment step was omitted in this comparative example, and only micro-etching treatment was performed on the polypropylene, and the subsequent steps were continued.

[0055] Comparative Example 4 In order to verify the effect of the anti-sticking material on the performance of the coiled material, the coating step of the anti-sticking material was omitted in this comparative example, and subsequent treatment was directly performed on the base material after being impregnated with the modified asphalt.

[0056] Comparative Example 5 In order to study the effect of ultraviolet curing on the performance of anti-sticking materials, natural air drying was used in this comparative example instead of ultraviolet curing to observe its effect on the performance of the coiled material.

[0057] Test Example 1 The performance of the waterproof membranes prepared in Examples 1-2 and Comparative Examples 1-5 was characterized, and the standard items included: 1. Waterproof performance test Test method: Use the hydrostatic pressure test method to test the anti-penetration ability of the coiled material. Place the coiled material under water at a fixed pressure and measure the amount of water that penetrates per unit time.

[0058] Test standard: Refer to GB / T 328.9-2007.

[0059] 2. Bond strength test Test Method: Use a tensile testing machine (such as a universal testing machine) to measure the bond strength between the membrane and the substrate (such as asphalt or polypropylene substrate).

[0060] Test standard: According to GB / T 328.21-2011.

[0061] 3. Weather resistance test Test method: Through artificial accelerated aging test (UV accelerated aging test box), the aging resistance of the coil under ultraviolet and high temperature environment is tested. The test time is 1000 hours, and the surface damage and performance changes are observed.

[0062] Test standard: Refer to GB / T 16422.2-1999.

[0063] 4. Wear resistance test Test method: Use Taber abrasion tester to test the wear resistance of the coil, use CS-17 grinding wheel, load 500g, rotation number 1000, record the wear amount of the coil.

[0064] Test standard: Refer to GB / T 1768-2006.

[0065] 5. Anti-stickiness test Test method: Stack two layers of coils and apply a certain pressure. After placing them in a high temperature (60°C) environment for 24 hours, test the anti-sticking effect of the coil surface and record the force required for separation.

[0066] Test standard: Refer to ISO 8295.

[0067] Table 1

[0068] By comparing the experimental results in Table 1, it can be clearly seen that the waterproof membranes prepared in Example 1 and Example 2 are superior to the comparative example in various performance indicators. The following is a specific analysis of the experimental results: 1. Waterproof performance The waterproof performance of Example 1 and Example 2 is excellent, and the permeation rate is extremely low, which is 0.01L / m 2 h and 0.015L / m 2h, indicating that the pretreatment steps and formulation adjustments effectively improved the waterproofing ability of the membrane.

[0069] Comparative Example 1 omitted the pretreatment step, resulting in a significant decrease in waterproof performance, with a permeation rate of 0.05 L / / m 2 h, verifying the importance of the pretreatment step on the waterproofing performance.

[0070] Although Comparative Examples 2, 3, 4 and 5 have different omitted steps, their waterproof performance is not as good as that of the embodiment, which shows that each step of the treatment has a positive contribution to the waterproof performance.

[0071] 2. Bond strength The bonding strength of Example 1 is the highest, reaching 1.85 MPa, and that of Example 2 is slightly lower but also at a relatively high level (1.75 MPa), indicating that the optimization of the formulation and process helps to improve the bonding strength between the coil and the substrate.

[0072] The bond strengths in the comparative experiments were generally low, especially those in which the pretreatment or low-temperature plasma treatment was omitted, further confirming the importance of these steps in enhancing the bond strength.

[0073] 3. Weather resistance Examples 1 and 2 performed well in the weather resistance test, and the decrease in tensile strength after aging was at a relatively low level (5.2% and 6.0%), indicating that the coiled materials have good stability under ultraviolet and high temperature environments.

[0074] The weather resistance performance in the comparative experiments is poor, especially in the comparative examples where the anti-sticking material coating is omitted or natural air drying is used instead of UV curing. The decrease in tensile strength after aging is more obvious.

[0075] 4. Wear resistance The wear resistance test results of Example 1 and Example 2 are similar, with the wear amounts being 7.5 mg and 8.0 mg respectively, indicating that the coil surface has good wear resistance.

[0076] The wear resistance of the comparative experiments was generally poor and the wear loss was high, especially for the comparative experiments in which some key processing steps were omitted.

[0077] 5. Anti-stickiness The anti-sticking property of Example 1 is the best, with a separation force of only 0.3N. The separation force of Example 2 is slightly higher but still within an acceptable range (0.4N), indicating that the coating of the anti-sticking material and the ultraviolet curing treatment effectively reduce the stickiness of the coil surface.

[0078] Comparative Example 4 omits the coating step of the anti-sticking material, resulting in a significant increase in anti-sticking properties (1.2N), while Comparative Example 5 uses natural air drying instead of UV curing treatment, which also affects the anti-sticking properties (0.9N).

[0079] In summary, the waterproof rolls prepared in Example 1 and Example 2 have excellent performance in terms of waterproof performance, bonding strength, weather resistance, wear resistance and anti-sticking properties, verifying the effectiveness and innovation of the technical solution of the present invention. At the same time, the results of the comparative experiment further prove the important influence of each processing step on the performance of the roll.

[0080] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A method for preparing a waterproof roll for a building top surface, It is characterized in that include: Modifying asphalt with styrene-ethylene-propylene-styrene and silicate to obtain modified asphalt; The base material is immersed in the modified asphalt, and an anti-sticking material is spread on the surface of the immersed base material to obtain a waterproof coiled material substrate; The waterproof coiled material base material is molded to obtain the waterproof coiled material.

2. The method for preparing the waterproof coiled material for the building top surface according to claim 1, It is characterized in that When modifying asphalt with styrene-ethylene-propylene-styrene and silicate to obtain modified asphalt, the following steps are included: The modified asphalt is obtained by pretreating styrene-ethylene-propylene-styrene and silicate with an in-situ growth modifier, and mixing the pretreated styrene-ethylene-propylene-styrene and silicate with asphalt to make the modifier fully dispersed in the asphalt.

3. The method for preparing the waterproof coiled material for the building top surface according to claim 2, It is characterized in that When pre-treated with in-situ grown modifiers, styrene-ethylene-propylene-styrene and silicates include: The in-situ growth modifier is dissolved in an organic solvent, and then styrene-ethylene-propylene-styrene and silicate are added to carry out stirring reaction, so that the in-situ growth modifier is chemically bonded with the surface of styrene-ethylene-propylene-styrene and silicate; The reaction conditions are as follows: stirring at a temperature of 80-120° C. for no less than 2 hours.

4. The method for preparing the waterproof coiled material for the building top surface according to claim 3, It is characterized in that The organic solvent is tetrahydrofuran; and the in-situ growth modifier is chloromethyltriethoxysilane.

5. The method for preparing the waterproof coiled material for the building top surface according to claim 4, It is characterized in that The weight ratio of tetrahydrofuran to chloromethyltriethoxysilane is 1:1.1-1.35; The weight ratio of styrene-ethylene-propylene-styrene to silicate is 1.5-2:1; The weight ratio of the total weight of tetrahydrofuran and chloromethyltriethoxysilane to the total weight of styrene-ethylene-propylene-styrene and silicate is 1:2.8-3.

2.

6. The method for preparing the waterproof coiled material for the building top surface according to claim 1, It is characterized in that Before the base tire material is immersed in the modified asphalt, the base tire material is pre-treated; Wherein, the base material is polypropylene, and the pretreatment includes micro-etching the clean polypropylene with an acid solution and then performing low-temperature plasma treatment.

7. The method for preparing the waterproof coiled material for the building top surface according to claim 6, It is characterized in that After the clean polypropylene is micro-etched by an acid solution, low-temperature plasma treatment is performed, which includes: Soak the clean polypropylene in a dilute sulfuric acid solution with a concentration of 5%-6% for 10-20 minutes, then rinse with clean water and dry; then put the dried polypropylene into a low-temperature plasma equipment and perform plasma treatment for 5-10 minutes at a power of 50-100W and a gas flow of 10-30L / min.

8. The method for preparing the waterproof coiled material for the building top surface according to claim 1, It is characterized in that The preparation method of the anti-sticking material comprises: Dissolving poly (N-isopropylacrylamide) in deionized water and adding ammonium persulfate to obtain a PNIPAM solution; The glass microbeads are immersed in a PNIPAM solution for stirring reaction, and after the reaction is completed, they are washed with water and dried to obtain basic glass microbeads; The perfluorooctyl triethoxysilane solution is sprayed on the surface of the basic glass microbeads, and then subjected to ultraviolet curing treatment after drying to obtain the anti-sticking material.

9. The method for preparing the waterproof coiled material for the building top surface according to claim 8, It is characterized in that The ultraviolet curing process comprises: 100-300W / cm 2 A high-pressure mercury lamp is used as the light source, focused on the UVA area for irradiation, and the irradiation time is 5-10 minutes; the distance between the glass beads and the light source is 10-15cm, and the temperature during ultraviolet curing treatment does not exceed 80°C.

10. A waterproof roll material for building top surface, It is characterized in that The waterproof coiled material is prepared by the method for preparing the waterproof coiled material for the top surface of a building according to any one of claims 1 to 9.

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