Non-cured rubber asphalt waterproof coating and preparation method thereof

Abstract

The invention provides a non-cured rubber asphalt waterproof coating. The waterproof coating comprises the following raw materials: asphalt, rubber, polyethylene wax and rosin resin. The waterproof coating further comprises a functional additive, the functional additives comprise a modified filler, an additive based on silicon carbide modification, graphene nanosheets, a low-temperature toughening agent and nano-silver particles. By introducing a low-temperature flexibilizer and flexible polymer blending system, the anti-cracking performance of the waterproof coating in an extremely low-temperature environment is remarkably improved, and the problem that a traditional coating is prone to cracking under the low-temperature condition is effectively solved.

Description

Technical Field

[0001] The present invention relates to the technical field of waterproof coatings, and in particular to a non-curing rubber asphalt waterproof coating and a preparation method thereof. Background Art

[0002] With the development of the construction industry, the demand for waterproof materials in construction projects is increasing, and the quality requirements are also getting higher and higher. For various construction projects, waterproofing projects for roofs, floors, and basements have come into being. Various waterproofing materials have been introduced one after another, and the waterproofing industry is booming.

[0003] The existing asphalt waterproof coating has poor low-temperature stability, and the product's bonding strength and high-temperature resistance are poor. It is difficult to achieve balanced improvement in the performance of the product. Based on this, the present invention further improves it. Summary of the Invention

[0004] In view of the defects of the prior art, the purpose of the present invention is to provide a non-curing rubber asphalt waterproof coating and a preparation method thereof to solve the problems raised in the above background technology.

[0005] The present invention solves the technical problem by adopting the following technical solutions: The present invention provides a non-curing rubber asphalt waterproof coating, which comprises the following raw materials: asphalt, rubber, polyethylene wax, and rosin resin; Wherein, the waterproof coating further comprises functional additives; The functional additives include modified fillers, additives based on silicon carbide modification, graphene nanosheets, low-temperature toughening agents and nano silver particles.

[0006] The present invention provides a method for preparing a non-curing rubber asphalt waterproof coating, the method comprising the following steps: S01, adding silane coupling agent KH550 and nano-kaolin to the sodium citrate solution, mixing and stirring to obtain a mixed solution; Add lanthanum oxide, silane coupling agent KH792 and nano-titanium dioxide into the mixed solution, continue mixing and stirring to obtain an interface-enhanced modified solution; S02, adding flaky talc powder to the interface enhancement modifying liquid and stirring to obtain a reaction liquid, filtering the reaction liquid using a vacuum filter, and drying after filtration to obtain a modified flaky talc agent; S03, adding boron nitride and hydroxyapatite to an yttrium nitrate solution, irradiating the solution using a microwave reactor, adding nano-silica sol after irradiation and stirring, filtering the solution using a vacuum filter, and drying the solution after filtration to obtain a high-crystallinity filling agent; S04, mixing the modified flaky talc and the high crystallinity filling agent according to a mass ratio, ball milling the mixture using a ball mill, filtering the mixture using a vacuum filter, and drying the mixture after filtering to obtain a modified filling agent; S05, placing silicon carbide powder in a proton irradiation box for irradiation to obtain irradiation-activated silicon carbide; Adding the irradiated activated silicon carbide to the chitosan solution, performing ultrasonic treatment using an ultrasonic machine, allowing the solution to stand after ultrasonic treatment, and then filtering the solution using a vacuum filter to obtain a silicon carbide-chitosan composite solution; Calcium sulfate whiskers and hydroxyapatite are added to a sodium lignin sulfonate solution, stirred, filtered using a vacuum filter, and dried to obtain a whisker agent; S06, weighing the silicon carbide-chitosan composite liquid and the whisker agent according to a mass ratio, placing the weighed materials in a ball mill for ball milling, adding a polyurethane prepolymer and a UV initiator after ball milling for UV curing, filtering the materials using a vacuum filter after curing, and drying the materials after filtering to obtain a silicon carbide-modified additive; S07, mixing the hydroxy-terminated polybutadiene and the maleic anhydride-grafted polyethylene according to a mass ratio, transferring the mixed mixture into a twin-screw extruder for melt blending, extruding and granulating the mixture after blending, and cooling the mixture to obtain a low-temperature toughening agent; S08, adding asphalt into a reactor for melting to obtain molten asphalt; S09, maintaining the molten asphalt at a constant temperature, adding rubber, polyethylene wax, and rosin resin in sequence, and stirring once, adding a modified filler, graphene nanosheets, and a low-temperature toughening agent after the first stirring, and stirring a second time, adding nanosilver particles after the second stirring, and stirring a third time to obtain a uniformly dispersed mixed slurry; S10, spreading the silicon carbide-modified additive on a tray of a UV curing box, and irradiating it with a UV light source to obtain a double-crosslinked silicon carbide-polyurethane composite additive; S11. Add the double-crosslinked silicon carbide-polyurethane composite additive to the uniformly dispersed mixed slurry and stir it. After stirring, use a vacuum degassing machine to extract and pressurize it, and cool it. After cooling, discharge and fill it to obtain a non-curing rubber asphalt waterproof coating.

[0007] Compared with the prior art, the present invention has the following beneficial effects: The present invention significantly improves the crack resistance of waterproof coatings in extreme low-temperature environments by introducing a blend of a low-temperature toughening agent and a flexible polymer, effectively solving the problem of traditional coatings being prone to cracking under low-temperature conditions. Combining the three-dimensional network structure of graphene nanosheets and silicon carbide-modified additives not only significantly enhances the coating's bonding strength and tensile strength, but also forms a chemical-physical dual cross-linking structure through an ultraviolet light curing process, significantly improving its high-temperature stability and overcoming the defect of existing materials that are prone to softening and deformation in high-temperature environments. The further introduction of nanosilver particles gives the coating a long-lasting antibacterial function, expanding its application scenarios in medical and hygiene-sensitive places; at the same time, the interface enhancement modifier is used to optimize the bonding force between the filler and the matrix, and the microwave-assisted synthesis process is used to improve the reaction efficiency, thereby achieving uniform dispersion and synergistic enhancement of each functional component. Ultimately, without sacrificing a single performance, the coating's low-temperature resistance, bonding strength, high-temperature resistance and multifunctional properties are comprehensively balanced, completely solving the industry problem of traditional asphalt waterproof coatings with single performance and difficulty in coordinated improvement, providing an efficient and reliable solution for building waterproofing projects in complex environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 The present invention is a flowchart of the steps of the preparation method of the non-curing rubber asphalt waterproof coating. DETAILED DESCRIPTION

[0009] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with specific embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0010] Example 1 A non-curing rubber asphalt waterproof coating of this embodiment comprises the following raw materials: asphalt, rubber, polyethylene wax, and rosin resin; Wherein, the waterproof coating further comprises functional additives; The functional additives include modified fillers, additives based on silicon carbide modification, graphene nanosheets, low-temperature toughening agents and nano silver particles.

[0011] Example 2 This embodiment provides a method for preparing a non-curing rubber asphalt waterproof coating, which is used to prepare the above-mentioned non-curing rubber asphalt waterproof coating. The method comprises the following steps: S01, take 1g of silane coupling agent KH550 and 2g of nano-kaolin, add them into 5mL of sodium citrate solution with a mass concentration of 5%, and stir at 400r / min at 25℃ for 5min to obtain a mixed solution; 1 g of lanthanum oxide, 0.5 mL of silane coupling agent KH792, and 0.2 g of nano-titanium dioxide were added to the mixture and stirred for 20 min to obtain an interface-enhanced modified solution, which was designated as A1. S02, taking 10 g of flaky talc powder and adding it to 30 mL of the interface-enhanced modifying solution in A1, stirring at 400 rpm for 40 min at 40° C. to obtain a reaction solution, filtering the reaction solution with a vacuum filter, and drying it at 60° C. for 2 h to obtain a modified flaky talc agent, which is recorded as B1; S03, adding 2 g of boron nitride and 1 g of hydroxyapatite to 5 mL of yttrium nitrate solution with a mass concentration of 2%, and irradiating the mixture using a 500 W microwave reactor for 4 min. After irradiation, 1 g of nano-silica sol was added and stirred for 10 min. After stirring, the mixture was filtered using a vacuum filter with a filter membrane pore size of 0.22 μm and a vacuum degree of -0.08 MPa. After filtration, the mixture was dried at 60° C. for 2 h to obtain a high-crystallinity filling agent, which was recorded as C1; S04. 5 g of the modified flaky talc in B1 and 3 g of the high-crystallinity filling agent in C1 were mixed in a mass ratio of 5:3. After mixing, the mixture was ball-milled using a 900 rpm ball mill for 0.5 h. After ball-milling, the mixture was filtered using a vacuum filter with a filter membrane pore size of 0.45 μm and a vacuum degree of -0.08 MPa. After filtration, the mixture was dried at 60° C. for 4 h to obtain a modified filling agent, which was recorded as D1. S05. Take 10 g of silicon carbide powder and place it in a 300 W proton irradiation box for 1 hour to obtain irradiation-activated silicon carbide; The irradiated activated silicon carbide was added to 30 mL of chitosan solution with a mass concentration of 2%, and ultrasonic treatment was performed for 20 min using an ultrasonic machine with a frequency of 40 kHz. After ultrasonic treatment, the solution was allowed to stand for 12 h, and then filtered using a vacuum filter to obtain a silicon carbide-chitosan composite solution, which was recorded as F1. 3 g of calcium sulfate whiskers and 2 g of hydroxyapatite were added to 5 mL of sodium lignin sulfonate solution with a mass concentration of 4%, and stirred at 600 r / min for 30 min at a temperature of 30°C. After stirring, the mixture was filtered using a vacuum filter and dried at 60°C for 4 h to obtain a whisker agent, which was recorded as E1. S06. 5 g of the silicon carbide-chitosan composite solution in F1 and 3 g of the whisker agent E1 were weighed in a mass ratio of 5:3. After weighing, the mixture was placed in a ball mill at 900 rpm for 0.5 h. After ball milling, 0.5 g of a polyurethane prepolymer and 0.1 g of a UV initiator were added and UV-cured at a light intensity of 280 mW / cm² for 4 min. After curing, the mixture was filtered using a vacuum filter with a vacuum degree of -0.08 MPa. After filtration, the mixture was dried at 40°C for 2 h to obtain a silicon carbide-modified additive, which was recorded as G1. S07, 1 g of hydroxyl-terminated polybutadiene and 2 g of maleic anhydride-grafted polyethylene were mixed in a mass ratio of 1:2, and after mixing, the mixture was transferred to a twin-screw extruder at a speed of 200 r / min and melt-blended at a temperature of 160° C. for 5 min. After blending, the mixture was extruded into pellets and cooled to room temperature to obtain a low-temperature toughening agent, which was recorded as H1; S08, adding 38 g of asphalt into a normal pressure reactor and melting it at 140° C. for 8 min to obtain molten asphalt, which is recorded as J1; S09, taking 36g of the molten asphalt in J1 and maintaining a constant temperature of 140°C, adding 10g of rubber, 3g of polyethylene wax and 2g of rosin resin in sequence, and stirring once at 180r / min for 3min, after the first stirring, adding 5g of the modified filler in D1, 0.5g of graphene nanosheets and 1g of the low-temperature toughening agent in H1, and stirring twice at a rate of 450r / min for 15min, after the second stirring, adding 0.1g of nanosilver particles, and stirring three times at a rate of 450r / min for 10min to obtain a uniformly dispersed mixed slurry, recorded as K1; S10, taking 3 g of the silicon carbide-modified additive in G1 and spreading it on a tray of a UV curing box with a wavelength of 365 nm and an intensity of 280 mW / cm², and irradiating it with the UV light source for 4 minutes to obtain a double-crosslinked silicon carbide-polyurethane composite additive, recorded as L1; S11. Take 3 g of the double-crosslinked silicon carbide-polyurethane composite additive in L1 and add it to the uniformly dispersed mixed slurry in 60 g of K1, stir at 180 r / min for 8 min, and after stirring, use a vacuum degassing machine with a vacuum degree of -0.08 MPa to evacuate and pressurize, and cool to 40°C. After cooling, discharge and fill to obtain a non-curing rubber asphalt waterproof coating, recorded as Q1.

[0012] Example 2 This embodiment provides a method for preparing a non-curing rubber asphalt waterproof coating, which is used to prepare the above-mentioned non-curing rubber asphalt waterproof coating. The method comprises the following steps: S01, take 1.5g of silane coupling agent KH550 and 2.5g of nano-kaolin, add 6.5mL of sodium citrate solution with a mass concentration of 6.5%, and stir at 500r / min at 30°C for 7.5min to obtain a mixed solution; 2 g of lanthanum oxide, 0.75 mL of silane coupling agent KH792, and 0.35 g of nano-titanium dioxide were added to the mixture and stirred for 30 min to obtain an interface-enhanced modified solution, which was designated as A2. S02, taking 10g of flaky talc powder and adding it to 40mL of the interface-enhanced modifying solution in A2, stirring at 450r / min at 50°C for 60min to obtain a reaction solution, filtering the reaction solution with a vacuum filter, and drying it at 70°C for 3h to obtain a modified flaky talc agent, which is recorded as B2; S03, adding 3 g of boron nitride and 2 g of hydroxyapatite to 6.5 mL of yttrium nitrate solution with a mass concentration of 3%, irradiating the mixture using a 600 W microwave reactor for 6 min, adding 1.5 g of nano-silica sol after irradiation and stirring for 15 min, and filtering the mixture using a vacuum filter with a filter membrane pore size of 0.22 μm and a vacuum degree of -0.09 MPa. After filtration, drying the mixture at 90° C. for 4.5 h to obtain a high-crystallinity filling agent, which is recorded as C2; S04, taking 6.5g of the modified flaky talc in B2 and 3.9g of the high crystallinity filling agent in C2 in a mass ratio of 5:3, and then ball milling them using a 1000r / min ball mill for 1h. After ball milling, the mixture was filtered using a vacuum filter with a vacuum degree of -0.09MPa and a pore size of 0.45μm. After filtration, the mixture was dried at 70°C for 6h to obtain a modified filling agent, which was recorded as D2; S05. Take 10 g of silicon carbide powder and place it in a 350 W proton irradiation box for 1.5 hours to obtain irradiation-activated silicon carbide; The irradiated activated silicon carbide was added to 35 mL of chitosan solution with a mass concentration of 3.5%, and ultrasonic treatment was performed for 25 min using an ultrasonic machine with a frequency of 40 kHz. After ultrasonic treatment, the solution was allowed to stand for 18 h, and then filtered using a vacuum filter to obtain a silicon carbide-chitosan composite solution, which was recorded as F2. 4 g of calcium sulfate whiskers and 3 g of hydroxyapatite were added to 6.5 mL of sodium lignin sulfonate solution with a mass concentration of 5.5%, stirred at 700 r / min at 40°C for 45 min, filtered using a vacuum filter, and dried at 70°C for 5 h to obtain a whisker agent, which was recorded as E2. S06, 6.5 g of the silicon carbide-chitosan composite liquid in F2 and 3.9 g of the E2 whisker agent were weighed in a mass ratio of 5:3, and the mixture was placed in a ball mill at 1000 rpm for 1 h. After ball milling, 0.75 g of a polyurethane prepolymer and 0.1 g of a UV initiator were added and UV-cured at a light intensity of 300 mW / cm² for 5 min. After curing, the mixture was filtered using a vacuum filter with a vacuum degree of -0.09 MPa, and then dried at 50°C for 3 h to obtain a silicon carbide-modified additive, which was recorded as G2; S07, 2 g of hydroxyl-terminated polybutadiene and 5 g of maleic anhydride-grafted polyethylene were mixed in a mass ratio of 1:2.5, and after mixing, the mixture was transferred to a twin-screw extruder at a speed of 300 r / min and melt-blended at 170° C. for 7.5 min. After blending, the mixture was extruded into pellets and cooled to room temperature to obtain a low-temperature toughening agent, which was recorded as H2; S08, adding 40 g of asphalt into a normal pressure reactor and melting it at 145° C. for 10 min to obtain molten asphalt, which is recorded as J2; S09, take 36g of the molten asphalt in J2 and keep it at a constant temperature of 140°C, add 12.5g of rubber, 4g of polyethylene wax and 3g of rosin resin in sequence, and stir once at 200r / min for 5.5min, add 6.5g of the modified filler in D2, 1.25g of graphene nanosheets and 2g of the low-temperature toughening agent in H2 after the first stirring, and stir twice at a rate of 500r / min for 20min, add 0.3g of nanosilver particles after the second stirring, and stir three times at a rate of 500r / min for 15min to obtain a uniformly dispersed mixed slurry, recorded as K2; S10, taking 3.5 g of the silicon carbide-modified additive in G2 and spreading it on a tray of a UV curing box with a wavelength of 365 nm and an intensity of 300 mW / cm², and irradiating it with the UV light source for 5 minutes to obtain a double-crosslinked silicon carbide-polyurethane composite additive, which is recorded as L2; S11. Take 3.5g of the double-crosslinked silicon carbide-polyurethane composite additive in L2 and add it to the uniformly dispersed mixed slurry in 65g of K2, stir at 200r / min for 10min, and after stirring, use a vacuum degassing machine with a vacuum degree of -0.09MPa to evacuate and pressurize, and cool to 40°C. After cooling, discharge and fill to obtain a non-curing rubber asphalt waterproof coating, recorded as Q2.

[0013] Example 3 This embodiment provides a method for preparing a non-curing rubber asphalt waterproof coating, which is used to prepare the above-mentioned non-curing rubber asphalt waterproof coating. The method comprises the following steps: S01, take 2g of silane coupling agent KH550 and 3g of nano-kaolin, add them into 8mL of sodium citrate solution with a mass concentration of 8%, and stir at 600r / min at 35°C for 10min to obtain a stirring solution; 3 g of lanthanum oxide, 1 mL of silane coupling agent KH792, and 0.5 g of nano-titanium dioxide were added to the mixture and stirred for 40 min to obtain an interface-enhanced modified solution, which was designated as A3. S02, taking 10 g of flaky talc powder and adding it to 50 mL of the interface-enhanced modifying solution in A3, stirring at 500 rpm for 80 min at 60° C. to obtain a reaction solution, filtering the reaction solution using a vacuum filter, and drying it at 80° C. for 4 h to obtain a modified flaky talc agent, which is recorded as B3; S03, adding 4 g of boron nitride and 3 g of hydroxyapatite to 8 mL of yttrium nitrate solution with a mass concentration of 4%, and irradiating the solution using a 700 W microwave reactor for 8 min. After irradiation, 2 g of nano-silica sol was added and stirred for 20 min. After stirring, the solution was filtered using a vacuum filter with a filter membrane pore size of 0.22 μm and a vacuum degree of -0.1 MPa. After filtration, the solution was dried at 100° C. for 6 h to obtain a high crystallinity filling agent, which was recorded as C3; S04, take 8g of the modified flaky talc in B3 and 5g of the high crystallinity filling agent in C3 in a mass ratio of 5:3, and then ball mill them using a 1100r / min ball mill for 1.5h. After ball milling, filter them using a vacuum filter with a vacuum degree of -0.1MPa and a pore size of 0.45μm. After filtration, dry them at 80°C for 8h to obtain a modified filling agent, which is recorded as D3; S05. Take 10 g of silicon carbide powder and place it in a 400 W proton irradiation box for 2 hours to obtain irradiation-activated silicon carbide; The irradiated activated silicon carbide was added to 50 mL of chitosan solution with a mass concentration of 5%, and ultrasonic treatment was performed for 30 min using an ultrasonic machine with a frequency of 40 kHz. After ultrasonic treatment, the solution was allowed to stand for 24 h, and then filtered using a vacuum filter to obtain a silicon carbide-chitosan composite solution, which was recorded as F3. 5 g of calcium sulfate whiskers and 4 g of hydroxyapatite were added to 8 mL of sodium lignin sulfonate solution with a mass concentration of 7%, stirred at 800 r / min at 50°C for 60 min, filtered using a vacuum filter, and dried at 80°C for 6 h to obtain a whisker agent, which was recorded as E3. S06, taking 8g of the silicon carbide-chitosan composite liquid in F3 and 5g of the E3 whisker agent in a mass ratio of 5:3, weighing them, placing them in a ball mill at 1100 rpm for 1.5 hours, adding 1g of polyurethane prepolymer and 0.1g of ultraviolet initiator after ball milling, and UV curing them at a light intensity of 320mW / cm² for 6 minutes. After curing, the mixture was filtered using a vacuum filter with a vacuum degree of -0.1MPa, and then dried at 60°C for 4 hours to obtain a silicon carbide-modified additive, which was recorded as G3; S07, 3 g of hydroxyl-terminated polybutadiene and 9 g of maleic anhydride-grafted polyethylene were mixed in a mass ratio of 1:3, and after mixing, the mixture was transferred to a twin-screw extruder at a speed of 400 r / min and melt-blended at a temperature of 170° C. for 10 min. After blending, the mixture was extruded into pellets and cooled to room temperature to obtain a low-temperature toughening agent, which was recorded as H3; S08, adding 42 g of asphalt into a normal pressure reactor and melting it at 150° C. for 12 min to obtain molten asphalt, which is recorded as J3; S09, take 40g of the molten asphalt in J3 and keep it at a constant temperature of 140°C, add 15g of rubber, 5g of polyethylene wax and 4g of rosin resin in sequence, and stir once at 220r / min for 7min, add 8g of the modified filler in D3, 2g of graphene nanosheets and 3g of the low-temperature toughening agent in H3 after the first stirring, and stir twice at a rate of 550r / min for 25min, add 0.5g of nanosilver particles after the second stirring, and stir three times at a rate of 550r / min for 20min to obtain a uniformly dispersed mixed slurry, recorded as K3; S10, taking 4 g of the silicon carbide-modified additive in G3 and spreading it on a tray of a UV curing box with a wavelength of 365 nm and an intensity of 320 mW / cm², and irradiating it with the UV light source for 6 minutes to obtain a double-crosslinked silicon carbide-polyurethane composite additive, which is recorded as L3; S11. Take 4 g of the double-crosslinked silicon carbide-polyurethane composite additive in L3 and add it to the uniformly dispersed mixed slurry in 75 g of K3, stir at 220 r / min for 12 min, and after stirring, use a vacuum degassing machine with a vacuum degree of -0.1 MPa to evacuate and pressurize, and cool to 60°C. After cooling, discharge and fill to obtain a non-curing rubber asphalt waterproof coating, recorded as Q3.

[0014] Comparative Example 1. The difference from Example 3 is that no modified filler is added.

[0015] Comparative Example 2. The difference from Example 3 is that no secondary filler is added during the preparation of the modified filler.

[0016] Comparative Example 3. Different from Example 3, boron nitride and hydroxyapatite are not added to the filling agent.

[0017] Comparative Example 4. The difference from Example 3 is that no modifying liquid is added during the preparation of the modified filler.

[0018] Comparative Example 5. The difference from Example 3 is that no silicon carbide-modified additive is added.

[0019] Comparative Example 6. The difference from Example 3 is that no whisker agent is added in the preparation of the silicon carbide modified additive.

[0020] In order to verify the effectiveness of the present invention, conventional performance tests were conducted on Examples 1-4 and Comparative Examples 1-6, including low temperature stability, bonding strength, and high temperature resistance. The test results are as follows:

[0021] From Examples 2-4 and Comparative Examples 1-6, it can be concluded that the product of Example 3 of the present invention has excellent softening point, low temperature stability and bonding strength, and the performance of the product can be improved in a coordinated manner; The product did not add a modified filler or one of the silicon carbide-modified additives, and the performance of the product deteriorated significantly. The modified filler was not added with a composite filler, boron nitride and hydroxyapatite were not added to the composite filler, the modified filler was not treated with a modified liquid, and the silicon carbide-modified additive was not added with a whisker. The performance of the product showed a trend of deterioration. The specific method of the present invention was used to obtain the raw materials for the product, and the product performance effect was the most significant.

[0022] Comparisons of Examples 2-4 with Comparative Examples 1, 5, 6, and the prior art are shown in Table 2 below. Table 2

[0023] As can be seen from Table 2 above, the bonding strength (≥2.6 MPa) and high temperature resistance (softening point ≥102°C, thermal decomposition ≥380°C) of Examples 2-4 are comprehensively superior to the prior art (1.8 MPa / 92°C / 300°C). Comparative Example 5 (without silicon carbide additive) has a thermal decomposition temperature of only 325°C due to the lack of a double cross-linked structure, which is close to the prior art level.

[0024] The synergistic effect of graphene and silicon carbide significantly improves the strength and thermal stability of the matrix.

[0025] The antibacterial performance of Examples 2-4 was compared with Comparative Example 1, Comparative Example 5 and the prior art. The comparison results are shown in Table 3 below: Table 3:

[0026] As can be seen from Table 3 above, the examples achieve an antibacterial rate of ≥99.5% through nanosilver particles (0.1-0.5 g), filling the gap in the existing technology without antibacterial function. Comparative Examples 1 and 5 do not add functional components, and their antibacterial performance is similar to that of the existing technology, which cannot meet the needs of medical scenarios.

[0027] The process efficiency of Example 3, Comparative Example 2, Comparative Example 4 and the prior art is compared, and the comparison results are shown in Table 4 below: Table 4

[0028] As shown in Table 4, Example 3 uses microwave-assisted synthesis (700 W) and UV curing (6 min), which shortens the reaction time by 40% and reduces energy consumption by 52% (compared to the prior art). Comparative Example 2 (no filler added) requires an additional step to repair defects, but its efficiency is close to the prior art level.

[0029] The comprehensive performance comparison of Example 3, Comparative Example 1, Comparative Example 5 and the prior art is as follows: Table 5 Table 5

[0030] It can be seen from Table 5 that Example 3 has a total score of 39 / 40, which exceeds the prior art (11 / 40), reflecting the advantage of multi-component synergistic effect.

[0031] In summary, the present invention systematically solves the performance defects of traditional asphalt waterproof coatings through four core innovations: low-temperature toughening agent (flexible chain segment anti-cracking), graphene nanosheets (enhanced conductivity and mechanical properties), silicon carbide modified additives (double cross-linking and high temperature resistance), and nanosilver particles (antibacterial function), combined with microwave-assisted synthesis and UV curing technology. Through material innovation and process optimization, it achieves a comprehensive breakthrough in the performance of waterproof coatings, and has significant creativity and industrial applicability.

[0032] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations that come within the meaning and range of equivalents of the claims be embraced therein.

[0033] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A non-curing rubber asphalt waterproof coating, characterized in that: The waterproof coating comprises the following raw materials: asphalt, rubber, polyethylene wax, rosin resin; Wherein, the waterproof coating further comprises functional additives; The functional additives include modified fillers, additives based on silicon carbide modification, graphene nanosheets, low-temperature toughening agents and nano silver particles.

2. The non-curing rubber asphalt waterproof coating according to claim 1, characterized in that: The low-temperature toughening agent is a blend of hydroxyl-terminated polybutadiene and maleic anhydride grafted polyethylene.

3. A method for preparing a non-curing rubber asphalt waterproof coating, for preparing the non-curing rubber asphalt waterproof coating according to claim 1, characterized in that: The method comprises the following steps: S01, adding silane coupling agent KH550 and nano-kaolin to the sodium citrate solution, mixing and stirring to obtain a mixed solution; Add lanthanum oxide, silane coupling agent KH792 and nano-titanium dioxide into the mixed solution, continue mixing and stirring to obtain an interface-enhanced modified solution; S02, adding flaky talc powder to the interface enhancement modifying liquid and stirring to obtain a reaction liquid, filtering the reaction liquid using a vacuum filter, and drying after filtration to obtain a modified flaky talc agent; S03, adding boron nitride and hydroxyapatite to an yttrium nitrate solution, irradiating the solution using a microwave reactor, adding nano-silica sol after irradiation and stirring, filtering the solution using a vacuum filter, and drying the solution after filtration to obtain a high-crystallinity filling agent; S04, mixing the modified flaky talc and the high crystallinity filling agent according to a mass ratio, ball milling the mixture using a ball mill, filtering the mixture using a vacuum filter, and drying the mixture after filtering to obtain a modified filling agent; S05, placing silicon carbide powder in a proton irradiation box for irradiation to obtain irradiation-activated silicon carbide; Adding the irradiated activated silicon carbide to the chitosan solution, performing ultrasonic treatment using an ultrasonic machine, allowing the solution to stand after ultrasonic treatment, and then filtering the solution using a vacuum filter to obtain a silicon carbide-chitosan composite solution; Calcium sulfate whiskers and hydroxyapatite are added to a sodium lignin sulfonate solution, stirred, filtered using a vacuum filter, and dried to obtain a whisker agent; S06, weighing the silicon carbide-chitosan composite liquid and the whisker agent according to a mass ratio, placing the weighed materials in a ball mill for ball milling, adding a polyurethane prepolymer and a UV initiator after ball milling for UV curing, filtering the materials using a vacuum filter after curing, and drying the materials after filtering to obtain a silicon carbide-modified additive; S07, mixing the hydroxy-terminated polybutadiene and the maleic anhydride-grafted polyethylene according to a mass ratio, transferring the mixed mixture into a twin-screw extruder for melt blending, extruding and granulating the mixture after blending, and cooling the mixture to obtain a low-temperature toughening agent; S08, adding asphalt into a reactor for melting to obtain molten asphalt; S09, maintaining the molten asphalt at a constant temperature, adding rubber, polyethylene wax, and rosin resin in sequence, and stirring once, adding a modified filler, graphene nanosheets, and a low-temperature toughening agent after the first stirring, and stirring a second time, adding nanosilver particles after the second stirring, and stirring a third time to obtain a uniformly dispersed mixed slurry; S10, spreading the silicon carbide-modified additive on a tray of a UV curing box, and irradiating it with a UV light source to obtain a double-crosslinked silicon carbide-polyurethane composite additive; S11. Add the double-crosslinked silicon carbide-polyurethane composite additive to the uniformly dispersed mixed slurry and stir it. After stirring, use a vacuum degassing machine to extract and pressurize it, and cool it. After cooling, discharge and fill it to obtain a non-curing rubber asphalt waterproof coating.

4. The method for preparing a non-curing rubber asphalt waterproof coating according to claim 3, characterized in that: In the process of obtaining the interface-enhanced modifying solution in step S01, the mass of the silane coupling agent KH550 is 1-2 g, the mass of the nano-kaolin is 2-3 g, the mass concentration of the sodium citrate solution is 5-8%, the volume of the sodium citrate solution is 5-8 mL, the mixing and stirring conditions are temperature of 25-35° C., the mixing and stirring rate is 400-600 r / min, and the mixing and stirring time is 5-10 min; The mass of lanthanum oxide is 1-3 g, the volume of silane coupling agent KH792 is 0.5-1 mL, the mass of nano-titanium dioxide is 0.2-0.5 g, and the mixing and stirring time is continued for 20-40 minutes; In the process of obtaining the modified flaky talc in step S02, the mass of the flaky talc powder is 10 g, the volume of the interface enhanced modifying liquid is 30-50 mL, the stirring rate is 400-500 r / min, the stirring time is 40-80 min, the stirring temperature is 40-60° C., the drying temperature is 60-80° C., and the drying time is 2-4 h.

5. The method for preparing a non-curing rubber asphalt waterproof coating according to claim 3, characterized in that: In the process of obtaining a high-crystallinity filling agent in step S03, the mass of boron nitride is 2-4 g, the mass of hydroxyapatite is 1-3 g, the mass concentration of yttrium nitrate solution is 2-4%, the volume of yttrium nitrate solution is 5-8 mL, the power of the microwave reactor is 500-700 W, the microwave irradiation time of the microwave reactor is 4-8 min, the irradiation temperature of the microwave reactor is 50-70° C., the mass of the nano-silica sol is 1-2 g, the stirring time is 10-20 min, the vacuum degree of the vacuum filter is -0.08-0.1 MPa, the pore size of the filter membrane of the vacuum filter is 0.22 μm, the drying temperature is 80-100° C., and the drying time is 3-6 h.

6. The method for preparing a non-curing rubber asphalt waterproof coating according to claim 3, characterized in that: In the process of obtaining the modified filler in step S04, the mass of the modified flaky talc is 5-8 g, the mass of the high crystallinity filling agent is 3-5 g, the mass ratio of the modified flaky talc to the high crystallinity filling agent is 5:3, the ball mill speed is 900-1100 r / min, the ball milling time is 0.5-1.5 h, the vacuum degree of the vacuum filter is -0.08 to -0.1 MPa, the pore size of the vacuum filter membrane is 0.45 μm, the drying temperature is 60-80° C., and the drying time is 4-8 h; In the process of obtaining the whisker agent in step S05, the mass of the silicon carbide powder is 10 g, the power of the proton irradiation box is 300-400 W, the irradiation time is 1-2 h, the volume of the chitosan solution is 30-50 mL, the mass concentration of the chitosan solution is 2-5%, the frequency of the ultrasonic machine is 40 kHz, the ultrasonic time is 20-30 min, the standing time is 12-24 h, the mass of the calcium sulfate whiskers is 3-5 g, the mass of the hydroxyapatite is 2-4 g, the mass concentration of the sodium lignin sulfonate solution is 4-7%, the volume of the sodium lignin sulfonate solution is 5-8 mL, the stirring rate is 600-800 r / min, the stirring time is 30-60 min, the stirring temperature is 30-50° C., the vacuum degree of the vacuum filter is -0.08 to -0.1 MPa, the pore size of the filter membrane of the vacuum filter is 0.45 μm, the drying temperature is 60-80° C., and the drying time is 4-6 h.

7. The method for preparing a non-curing rubber asphalt waterproof coating according to claim 3, characterized in that: In the process of obtaining the silicon carbide-modified additive in step S06, the mass of the silicon carbide-chitosan composite liquid is 5-8 g, the mass of the whisker agent is 3-5 g, the mass ratio of the silicon carbide-chitosan composite liquid to the whisker agent is 5:3, the ball mill speed is 900-1100 r / min, the ball milling time is 0.5-1.5 h, the mass of the polyurethane prepolymer is 0.5-1 g, the mass of the ultraviolet initiator is 0.1 g, the ultraviolet light curing intensity is 280-320 mW / cm², the curing time is 4-6 min, the vacuum degree of the vacuum filter is -0.08 to -0.1 MPa, the pore size of the vacuum filter membrane is 0.45 μm, the drying temperature is 40-60° C., and the drying time is 2-4 h.

8. The method for preparing a non-curing rubber asphalt waterproof coating according to claim 3, characterized in that: In the process of obtaining the low-temperature toughening agent in step S07, the mass of the terminal hydroxyl polybutadiene is 1-3 g, the mass of the maleic anhydride grafted polyethylene is 2-9 g, the mass ratio of the terminal hydroxyl polybutadiene to the maleic anhydride grafted polyethylene is 1:2-3, the speed of the twin-screw extruder is 200-400 r / min, the temperature of the twin-screw extruder is 160-180° C., and the melt blending time of the twin-screw extruder is 5-10 min.

9. The method for preparing a non-curing rubber asphalt waterproof coating according to claim 3, characterized in that: In the process of obtaining molten asphalt in step S08, the mass of the asphalt is 38-42 g, the conditions of the reactor are normal pressure, the melting temperature of the reactor is 140-150° C., and the melting time is 8-12 min; In the process of obtaining a uniformly dispersed mixed slurry in step S09, the mass of the molten asphalt is 36-40g, the mass of the added rubber is 10-15g, the mass of the polyethylene wax is 3-5g, the mass of the rosin resin is 2-4g, the rate of the first stirring is 180-220r / min, the time of the first stirring is 3-7min, the mass of the modified filler added is 5-8g, the mass of the graphene nanosheets is 0.5-2g, the mass of the low-temperature toughening agent is 1-3g, the stirring rate of the second stirring is 450-550r / min, the time of the second stirring is 15-25min, the mass of the added nanosilver particles is 0.1-0.5g, the rate of the third stirring is 450-550r / min, and the time of the third stirring is 10-20min.

10. The method for preparing a non-curing rubber asphalt waterproof coating according to claim 3, characterized in that: In the process of obtaining the double-crosslinked silicon carbide-polyurethane composite additive in step S10, the mass of the silicon carbide-modified additive is 3-4 g, the wavelength of the ultraviolet light source is 365 nm, the intensity of the ultraviolet light source is 280-320 mW / cm², and the irradiation time is 4-6 min; In the process of obtaining the non-curing rubber asphalt waterproof coating in step S11, the mass of the double-crosslinked silicon carbide-polyurethane composite additive is 3-4 g, the mass of the uniformly dispersed mixed slurry is 60-75 g, the stirring rate is 180-220 r / min, the stirring time is 8-12 min, the vacuum degree of the vacuum degassing machine is -0.08-0.1 MPa, and the cooling temperature is 40-60°C.

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