Vapor-permeable polymer cement waterproof coating and preparation method thereof

Abstract

The invention discloses a vapor-permeable polymer cement waterproof coating and a preparation method thereof. The invention relates to a high-temperature-resistant coating which is composed of a liquid material and a powder material, and the mixing mass ratio of the liquid material to the powder material is 1: (2.0-2.3) when the coating is used. Wherein the liquid material is mainly composed of an elastic acrylate-organic silicon-fluorocarbon ternary composite emulsion, a tetrabutyl orthosilicate hydrolysate, a sodium polycarboxylate dispersant, a fatty acid macrogol ester dispersant, a composite anti-aging aid, a sodium bicarbonate micro-foaming agent, a citric acid micro-foaming agent, an aluminum sulfate coagulant and permeable epoxy resin; the powder material is prepared from a nano-porous silicon dioxide-micron diatomite composite vapor permeable material, modified graphene oxide, nano-cellulose, sulphoaluminate cement, Portland cement, sodium sulfate and quartz sand. Through innovation of a component system, optimization of structural design and improvement of a preparation process, synergistic improvement of six performance dimensions of vapor permeability, water resistance, toughness, durability, environmental protection and construction is realized, and the technical problem of a traditional product is solved.

Description

Technical Field

[0001] This invention belongs to the field of building decoration materials, specifically relating to a breathable polymer cement waterproof coating and its preparation method. Background Technology

[0002] Polymer cement waterproof coatings (JS waterproof coatings for short) are widely used in waterproofing applications such as building roofs, kitchens and bathrooms, and underground projects due to their combination of the flexibility of organic polymers and the rigidity of inorganic cement, as well as their good environmental performance and high bonding strength. With the development of green building and energy-saving insulation technologies, the "non-permeable" defect of traditional dense waterproof coatings has become increasingly prominent: moisture inside the substrate (such as concrete and masonry) cannot escape, and long-term accumulation can easily lead to coating blistering, peeling, and even cause mold growth on the substrate and a decrease in structural durability. Especially in external wall insulation systems and passive ultra-low energy buildings, clear requirements have been placed on the permeability of waterproof coatings. To address the aforementioned issues, existing technologies have attempted to develop breathable polymer cement waterproof coatings. The main technical approaches include: using a single acrylic emulsion or a silicone-modified acrylic emulsion as the film-forming substance, improving breathability by reducing the emulsion solids content or introducing hydrophilic groups; adding porous fillers such as diatomaceous earth and zeolite powder to the powder to construct breathable channels; and using a foaming process to prepare a porous coating. However, these technical solutions still have the following key drawbacks: 1. Imbalance between vapor permeability and waterproof performance: Existing technologies often improve vapor permeability by sacrificing the density of the coating, resulting in a significant decrease in water impermeability (generally below 0.3MPa / 30min), which cannot meet the requirements of high-level waterproofing. Although some products ensure waterproofing by increasing the amount of cement, the vapor permeability (water vapor permeation density ≤50g / m²·24h) is difficult to meet the building moisture-proof standards, and the two are difficult to optimize in a coordinated manner. 2. Insufficient mechanical properties and durability: The introduction of porous structures can easily lead to low tensile strength (≤1.5MPa) and poor crack resistance of the coating, making it prone to cracking when the base layer deforms; at the same time, the weather resistance of the single emulsion modification system is weak, and its performance degrades severely after ultraviolet aging (tensile strength retention rate ≤80%), and it is prone to powdering and peeling after long-term use. 3. Poor adhesion strength and construction adaptability: Existing breathable coatings rely mainly on physical adsorption for adhesion to the substrate, and the adhesion strength is generally lower than 1.0 MPa. When applied to damp substrates (moisture content > 10%) or low-temperature environments (< 10℃), the curing speed is slow (drying time ≥ 24h) and interlayer delamination is prone to occur. Some products only support a single construction method (such as troweling), making it difficult to adapt to complex construction scenarios. 4. Lack of rationality in preparation process: Existing foaming processes mostly use high-temperature foaming agents, which are prone to producing interconnected channels with uneven pore size (>10μm), leading to waterproof failure; the lack of targeted core-shell structure design in emulsion polymerization process makes it difficult for organic and inorganic phases to form a stable interpenetrating network, further exacerbating the performance contradiction. Therefore, developing a breathable polymer cement waterproof coating that combines high breathability, high waterproofness, excellent mechanical properties and durability, and is also environmentally friendly and adaptable to construction has become a technical challenge that the industry urgently needs to solve. Summary of the Invention

[0003] To overcome the above shortcomings, this invention provides a breathable polymer cement waterproof coating and its preparation method. This breathable polymer cement waterproof coating achieves synergistic improvement in six performance dimensions: breathability, waterproofing, toughness, durability, environmental protection, and construction, through innovative component system, optimized structural design, and improved preparation process. It solves the technical problem that traditional products cannot meet the needs of high-end scenarios such as green buildings and ultra-low energy consumption buildings.

[0004] To achieve the above objectives, the technical solution of the present invention is as follows: A breathable polymer cement waterproof coating, characterized in that it is composed of liquid and powder components: The liquid material is mainly composed of the following raw materials in the following mass ratios: 70-85 parts of elastic acrylate-silicone-fluorocarbon ternary composite emulsion 3-5 parts of butyl orthosilicate hydrolysis product Sodium polycarboxylate dispersant: 0.1-0.3 parts 0.1-0.3 parts of fatty acid polyethylene glycol ester dispersant 0.5-0.8 parts of compound anti-aging additives Sodium bicarbonate microfoaming agent 0.4-0.6 parts Citric acid microfoaming agent 0.4-0.6 parts 0.1-0.2 parts of aluminum sulfate coagulant. 2-3 parts of penetrating epoxy resin The elastic acrylate-silicone-fluorocarbon ternary composite emulsion is composed of the following raw materials in the following mass ratios: 24-34 parts of elastic acrylate seed emulsion 7-10 parts of organosilicon monomer 3-5 parts of fluorocarbon monomer 35-45 parts deionized water; The hydrolysis product of butyl orthosilicate is composed of the following raw materials in the following mass ratios: 0.5-1 part of butyl orthosilicate 1.5-4.5 parts ethanol; The composite anti-aging additive is composed of the following raw materials in the following mass ratios: 0.25-0.4 parts of benzotriazole UV absorber 0.25-0.4 parts of hindered phenolic free radical scavenger; The powder is mainly composed of the following raw materials in the following mass ratios: 15-25 parts of nanoporous silica-micron-sized diatomite composite breathable material 0.1-0.3 parts of modified graphene oxide 0.1-0.5 parts of nanocellulose 20-30 parts of sulfoaluminate cement 15-20 parts of silicate cement 3-5 parts sodium sulfate 10-40 parts of quartz sand The nanoporous silica-micron-sized diatomaceous earth composite breathable material is composed of the following raw materials in the following mass ratios: 9-15 parts of nanoporous silica 6-10 parts of micron-sized diatomaceous earth.

[0005] Furthermore, in the elastic acrylate-organosilicon-fluorocarbon ternary composite emulsion, the organosilicon monomer is preferably γ-methacryloyloxypropyltrimethoxysilane, and the fluorocarbon monomer is preferably fluorinated acrylate.

[0006] Further, the preparation method of the butyl orthosilicate hydrolysis product is as follows: butyl orthosilicate is mixed with ethanol, and hydrochloric acid with a mass fraction of 0.8%-1.2% is added dropwise to adjust the pH to 3-4. The mixture is stirred at 500-800 rpm for 1-2 hours at room temperature to obtain the hydrolysis product.

[0007] Furthermore, in the nanoporous silica-micron-sized diatomite composite breathable material, the nanoporous silica particle size is preferably 20-50 nm, and the micron-sized diatomite particle size is preferably 5-10 μm.

[0008] Furthermore, the modified graphene oxide is an aminated modified graphene oxide, and the modification method is as follows: dispersing graphene oxide and 3-aminopropyltriethoxysilane in deionized water at a mass ratio of 10:1-1.5, reacting at 60-70℃ for 4-6 hours, and obtaining the modified graphene oxide by filtration, washing, and drying.

[0009] Furthermore, the silicate cement preferably has a particle size ≤5μm and a compressive strength ≥42.5MPa.

[0010] Furthermore, the preferred particle size of the quartz sand is 80-120 mesh.

[0011] Furthermore, the mixing mass ratio of the liquid material and the powder material during use is 1:2.0-2.3.

[0012] This invention also includes a method for preparing a breathable polymer cement waterproof coating, characterized by comprising the preparation of liquid and powder components: The preparation method of the liquid material includes the following steps performed in sequence: 1) Pre-emulsification: Add organosilicon monomers and fluorocarbon monomers to deionized water, stir at 300-1000 rpm for 30-40 minutes to form a pre-emulsion; 2) Seed polymerization: The elastic acrylate seed emulsion is added to the reactor, heated to 65-75℃, and the pre-emulsion prepared in step 1) is added dropwise. The mixture is kept at the temperature for 2-3 hours to obtain a core-shell structured elastic acrylate-organosilicon-fluorocarbon ternary composite emulsion. 3) Post-crosslinking: Add the hydrolysis product of butyl orthosilicate to the emulsion obtained in step 2) and react for 1-1.5 h. After cooling, add sodium polycarboxylate dispersant, fatty acid polyethylene glycol dispersant, composite anti-aging agent, sodium bicarbonate microfoaming agent, citric acid microfoaming agent, aluminum sulfate coagulant, and penetrating epoxy resin. Stir at 800-1000 r / min for 30-45 min to obtain liquid. The powder preparation method is as follows: add nanoporous silica-micron-sized diatomite composite breathable material, modified graphene oxide, nanocellulose, sulfoaluminate cement, silicate cement, sodium sulfate, and quartz sand into a mixer, and dry mix at a speed of 1200-1500 r / min for 20-30 min to ensure uniform dispersion of the components to obtain the powder.

[0013] The present invention also includes the application of a breathable polymer cement waterproof coating, characterized in that: liquid and powder are added to a mixing device at the construction site at a mass ratio of 1:2.0-2.3, the mixing speed is controlled at 800-1200 r / min and the temperature at 5-35℃, and the mixture is stirred for 5-10 minutes to obtain the breathable polymer cement waterproof coating.

[0014] Principle of this invention: The core film-forming material, an elastic acrylate-organosilicon-fluorocarbon ternary composite emulsion, employs a core-shell polymerization process. The elastic acrylate serves as the core to ensure the coating's flexibility, while the organosilicon-fluorocarbon copolymer forms the shell to construct a dense hydrophobic layer, resolving the contradiction between the permeability of a single emulsion and its water resistance and durability. Simultaneously, the hydrolysis products of tetrabutyl orthosilicate are introduced, and the silanol groups generated by their hydrolysis chemically bond with cement hydration products (calcium hydroxide, CSH gel), strengthening the interfacial bonding between the organic and inorganic phases.

[0015] Functional additives use a blend of sodium polycarboxylate dispersant and fatty acid polyethylene glycol dispersant to replace traditional APEO-containing dispersants, reducing VOC emissions; composite anti-aging additives are composed of benzotriazole UV absorbers and hindered phenolic free radical scavengers to inhibit UV-induced free radical degradation reactions; sodium bicarbonate microfoaming agent and citric acid microfoaming agent are blended to slowly release CO2 in the early stages of cement hydration, forming interconnected channels with uniform pore size; aluminum sulfate accelerator improves the curing efficiency of coatings in low-temperature environments; and penetrating epoxy resin enhances the penetration and adhesion between the coating and the substrate.

[0016] The nanoporous silica-micron-sized diatomaceous earth composite breathable material uses nanoporous silica (particle size 20-50nm) and micron-sized diatomaceous earth (particle size 5-10μm) to construct a "micro-nano interconnected pore" structure. The nano-sized micropores provide water vapor permeation channels, while the micron-sized pores guide moisture. The pore size is precisely controlled within 0.1-5μm (between the diameter of liquid water molecule clusters <100μm and the diameter of water vapor molecules <0.0004μm), achieving the core function of "breathable without leaking water".

[0017] Modified graphene oxide (aminated) is dispersed with the aid of nanocellulose, which enhances the tensile strength and crack resistance of the coating by utilizing its high specific surface area and mechanical properties; sulfoaluminate cement and silicate cement are compounded to accelerate the hydration rate and improve the density of the coating; sodium sulfate, as a hydration promoter, reacts with sulfoaluminate cement to generate needle-like hydration products, forming an interpenetrating network of "organic film-inorganic whiskers"; quartz sand optimizes the particle size distribution of the coating and enhances its wear resistance.

[0018] Advantages of this invention: 1. Synergistic optimization of vapor permeability and waterproof performance: Through the design of "dense surface layer of ternary composite emulsion + micro-nano interconnected pore middle layer", the water vapor permeability density is ≥50g / m²·24h and the water impermeability is ≥0.4MPa / 30min, which completely solves the core contradiction of existing technologies that "vapor permeability inevitably reduces waterproof performance".

[0019] 2. Significantly improved mechanical properties and durability: The synergistic effect of organic-inorganic interpenetrating network and modified graphene oxide results in a coating tensile strength ≥2.0MPa, elongation at break ≥40%, and no cracks when bent at -10℃; the addition of composite anti-aging additives ensures that the tensile strength retention rate is ≥90% after 3750h of UV aging, and it can withstand 20 freeze-thaw cycles (-20℃~50℃) without damage, extending the service life by more than 50% compared to traditional products.

[0020] 3. Significantly improved bonding strength and construction adaptability: The chemical bonding between the penetrating epoxy resin and cement hydration products in the base layer results in a bonding strength of ≥1.8MPa between the coating and the concrete substrate (30% higher than existing products); the introduction of the accelerator enables normal curing at low temperatures of 5-10℃, with a surface drying time of ≤4h and a complete drying time of ≤12h. It can be applied directly when the substrate moisture content is ≤15%, and supports multiple application methods such as scraping, rolling, and spraying, making it suitable for complex construction scenarios.

[0021] 4. Environmental friendliness and storage stability meet standards: It adopts an APEO-free dispersion system and environmentally friendly additives, with VOC content ≤10g / L (far exceeding the industry standard requirement of 20g / L), free of heavy metals and formaldehyde, and meets green building standards; the optimization of the pre-emulsification-seed polymerization process and compound dispersion system ensures that the liquid material has a storage stability of ≥6 months and the powder material has no stratification or sedimentation, solving the problem of poor compatibility of traditional products.

[0022] 5. Wide range of applications: It can be applied to various scenarios such as external wall insulation systems, passive ultra-low energy buildings, kitchens and bathrooms, underground garages, and old building repairs. In particular, it meets the dual requirements of high-level waterproofing and breathable moisture-proofing, and has significant economic and social benefits. Specific implementation methods

[0023] The exemplary embodiments of the present invention are described in more detail below. These embodiments are intended to provide a more thorough understanding of the invention and to fully convey the scope of the invention to those skilled in the art. While exemplary embodiments of the present invention are shown, it should be understood that the invention should not be limited to the embodiments set forth herein.

[0024] The raw materials and their brands used in the embodiments and comparative examples of this invention are as follows. These raw material brands and models are for reference only for the embodiments, and the specific implementation is not limited to using the following brands and models:

[0025] All other raw materials are commercially available industrial-grade conventional raw materials. Example 1

[0026] The breathable polymer cement waterproof coating in this embodiment includes liquid and powder components. The liquid component is composed of the following raw materials in parts by weight: 70 parts of elastic acrylate-silicone-fluorocarbon ternary composite emulsion 3.0 parts of hydrolysis product of butyl orthosilicate 0.1 parts of sodium polycarboxylate dispersant 0.1 parts of fatty acid polyethylene glycol ester dispersant 0.5 parts of compound anti-aging additive 0.4 parts sodium bicarbonate microfoaming agent Citric acid microfoaming agent 0.4 parts, 0.1 parts of aluminum sulfate coagulant 2.0 parts of penetrating epoxy resin The elastic acrylate-silicone-fluorocarbon ternary composite emulsion is composed of the following raw materials in the following mass ratios: 24 parts of elastic acrylate seed emulsion 7 parts of organosilicon monomer 3 parts of fluorocarbon monomer 35 parts deionized water; The hydrolysis product of butyl orthosilicate is composed of the following raw materials in the following mass ratios: 0.5 parts of tetrabutyl orthosilicate 1.5 parts ethanol; The composite anti-aging additive is composed of the following raw materials in the following mass ratios: 0.25 parts of benzotriazole UV absorber 0.25 parts of hindered phenolic free radical scavenger; The powder is composed of the following raw materials in parts by weight: 15 parts of nanoporous silica-micron-sized diatomite composite breathable material 0.1 parts of modified graphene oxide 0.1 parts of nanocellulose 20 parts of sulfoaluminate cement 15 parts of silicate cement 3 parts sodium sulfate 10 parts of 80-120 mesh quartz sand.

[0027] The nanoporous silica-micron-sized diatomaceous earth composite breathable material is composed of the following raw materials in the following mass ratios: 9 parts of nanoporous silica Six portions of micron-sized diatomaceous earth.

[0028] The preparation method of the butyl orthosilicate hydrolysis product in this embodiment is as follows: Butyl orthosilicate was mixed with ethanol, and hydrochloric acid with a mass percentage concentration of 0.8% was added dropwise to adjust the pH to 3. The mixture was stirred at 500 rpm for 1 hour at room temperature to obtain the hydrolysis product.

[0029] The modified graphene oxide method described in this embodiment is as follows: graphene oxide and 3-aminopropyltriethoxysilane are dispersed in deionized water at a mass ratio of 10:1, reacted at 60°C for 4 hours, and then filtered, washed, and dried to obtain the modified graphene oxide.

[0030] In this embodiment, the mixing mass ratio of the liquid material and the powder material during use is 1:2.0.

[0031] The liquid preparation method in this embodiment is as follows: 1) Pre-emulsification: Add organosilicon monomers and fluorocarbon monomers to deionized water, stir at 300 rpm for 40 minutes to form a pre-emulsion; 2) Seed polymerization: The elastic acrylate seed emulsion was added to the reactor, heated to 75°C, and the pre-emulsion prepared in step 1) was added dropwise. The mixture was kept at the temperature for 2 hours to obtain a core-shell structured elastic acrylate-organosilicon-fluorocarbon ternary composite emulsion. 3) Post-crosslinking: Add the hydrolysis product of tetrabutyl orthosilicate to the emulsion obtained in step 2) and react for 1 hour. After cooling, add sodium polycarboxylate dispersant, fatty acid polyethylene glycol dispersant, composite anti-aging agent, sodium bicarbonate microfoaming agent, citric acid microfoaming agent, aluminum sulfate coagulant, and penetrating epoxy resin. Stir at 800 r / min for 30 minutes to obtain liquid.

[0032] In this embodiment, the powder preparation method is as follows: nanoporous silica-micron-sized diatomite composite breathable material, modified graphene oxide, nanocellulose, sulfoaluminate cement, silicate cement, sodium sulfate, and quartz sand are added to a mixer and dry-mixed at a speed of 1200 r / min for 20 min to ensure uniform dispersion of the components and obtain the powder.

[0033] In this embodiment, the application method of the breathable polymer cement waterproof coating is as follows: at the construction site, the liquid and powder are added to the mixing equipment at a mass ratio of 1:2.0, and the mixture is stirred for 5 minutes at a temperature of 5℃ and a stirring speed of 800r / min to obtain the finished breathable polymer cement waterproof coating. Example 2

[0034] The breathable polymer cement waterproof coating in this embodiment includes liquid and powder components. The liquid component is composed of the following raw materials in parts by weight: 73 parts of elastic acrylate-silicone-fluorocarbon ternary composite emulsion 3.5 parts of hydrolysis product of butyl orthosilicate 0.18 parts of sodium polycarboxylate dispersant 0.18 parts of fatty acid polyethylene glycol ester dispersant 0.55 parts of compound anti-aging additives Sodium bicarbonate microfoaming agent 0.45 parts Citric acid microfoaming agent 0.45 parts, 0.12 parts of aluminum sulfate coagulant 2.2 parts of penetrating epoxy resin The elastic acrylate-silicone-fluorocarbon ternary composite emulsion is composed of the following raw materials in the following mass ratios: 25.5 parts of elastic acrylate seed emulsion 7.3 parts of organosilicon monomer 3.65 parts of fluorocarbon monomer 38 portions of deionized water; The hydrolysis product of butyl orthosilicate is composed of the following raw materials in the following mass ratios: 0.5 parts of tetrabutyl orthosilicate 2.5 parts ethanol; The composite anti-aging additive is composed of the following raw materials in the following mass ratios: 0.28 parts of benzotriazole UV absorber 0.28 parts of hindered phenolic free radical scavenger; The powder is composed of the following raw materials in parts by weight: 15 parts of nanoporous silica-micron-sized diatomite composite breathable material 0.15 parts of modified graphene oxide 0.2 parts of nanocellulose 22 parts of sulfoaluminate cement 16 parts of silicate cement 3.5 parts sodium sulfate 10 parts of 80-120 quartz sand.

[0035] The nanoporous silica-micron-sized diatomaceous earth composite breathable material is composed of the following raw materials in the following mass ratios: 9 parts of nanoporous silica Six portions of micron-sized diatomaceous earth.

[0036] The preparation method of the butyl orthosilicate hydrolysis product in this embodiment is as follows: Butyl orthosilicate was mixed with ethanol, and hydrochloric acid with a mass percentage concentration of 0.8% was added dropwise to adjust the pH to 3. The mixture was stirred at 500 rpm for 1 hour at room temperature to obtain the hydrolysis product.

[0037] The modified graphene oxide method described in this embodiment is as follows: graphene oxide and 3-aminopropyltriethoxysilane are dispersed in deionized water at a mass ratio of 10:1, reacted at 60°C for 4 hours, and then filtered, washed, and dried to obtain the modified graphene oxide.

[0038] In this embodiment, the mixing mass ratio of the liquid material and the powder material during use is 1:2.0.

[0039] The liquid preparation method in this embodiment is as follows: 1) Pre-emulsification: Add organosilicon monomers and fluorocarbon monomers to deionized water, stir at 400 rpm for 39 min to form a pre-emulsion; 2) Seed polymerization: The elastic acrylate seed emulsion was added to the reactor, heated to 75°C, and the pre-emulsion prepared in step 1) was added dropwise. The mixture was kept at the temperature for 2 hours to obtain a core-shell structured elastic acrylate-organosilicon-fluorocarbon ternary composite emulsion. 3) Post-crosslinking: Add the hydrolysis product of tetrabutyl orthosilicate to the emulsion obtained in step 2) and react for 1.5 h. After cooling, add sodium polycarboxylate dispersant, fatty acid polyethylene glycol dispersant, composite anti-aging agent, sodium bicarbonate microfoaming agent, citric acid microfoaming agent, aluminum sulfate coagulant, and penetrating epoxy resin. Stir at 850 r / min for 32 min to obtain liquid.

[0040] In this embodiment, the powder preparation method is as follows: nanoporous silica-micron-sized diatomite composite breathable material, modified graphene oxide, nanocellulose, sulfoaluminate cement, silicate cement, sodium sulfate, and quartz sand are added to a mixer and dry-mixed at a speed of 1250 r / min for 22 min to ensure uniform dispersion of the components and obtain the powder.

[0041] In this embodiment, the application method of the breathable polymer cement waterproof coating is as follows: at the construction site, the liquid and powder are added to the mixing equipment at a mass ratio of 1:2.0, and the mixture is stirred for 6 minutes at a temperature of 10℃ and a stirring speed of 900r / min to obtain the finished breathable polymer cement waterproof coating. Example 3

[0042] The breathable polymer cement waterproof coating in this embodiment includes liquid and powder components. The liquid component is composed of the following raw materials in parts by weight: 76 parts of elastic acrylate-silicone-fluorocarbon ternary composite emulsion 4.0 parts of hydrolysis product of butyl orthosilicate 0.2 parts of sodium polycarboxylate dispersant 0.2 parts of fatty acid polyethylene glycol ester dispersant 0.6 parts of compound anti-aging additives 0.5 parts sodium bicarbonate microfoaming agent Citric acid microfoaming agent 0.5 parts, 0.14 parts of aluminum sulfate coagulant 2.4 parts of penetrating epoxy resin The elastic acrylate-silicone-fluorocarbon ternary composite emulsion is composed of the following raw materials in the following mass ratios: 26.6 parts of elastic acrylate seed emulsion 7.6 parts of organosilicon monomer 3.8 parts of fluorocarbon monomer 40 parts deionized water; The hydrolysis product of butyl orthosilicate is composed of the following raw materials in the following mass ratios: 0.5 parts of tetrabutyl orthosilicate 4.5 parts ethanol; The composite anti-aging additive is composed of the following raw materials in the following mass ratios: 0.3 parts of benzotriazole UV absorber 0.3 parts of hindered phenolic free radical scavenger; The powder is composed of the following raw materials in parts by weight: 20 parts of nanoporous silica-micron-sized diatomite composite breathable material 0.2 parts of modified graphene oxide 0.3 parts of nanocellulose 24 parts of sulfoaluminate cement 17 parts of silicate cement Sodium sulfate 4.0 parts 25 parts of 80-120 mesh quartz sand.

[0043] The nanoporous silica-micron-sized diatomaceous earth composite breathable material is composed of the following raw materials in the following mass ratios: 9 parts of nanoporous silica Six portions of micron-sized diatomaceous earth.

[0044] The preparation method of the butyl orthosilicate hydrolysis product in this embodiment is as follows: Butyl orthosilicate was mixed with ethanol, and hydrochloric acid with a mass percentage concentration of 0.8% was added dropwise to adjust the pH to 3. The mixture was stirred at 500 rpm for 1 hour at room temperature to obtain the hydrolysis product.

[0045] The modified graphene oxide method described in this embodiment is as follows: graphene oxide and 3-aminopropyltriethoxysilane are dispersed in deionized water at a mass ratio of 10:1, reacted at 60°C for 4 hours, and then filtered, washed, and dried to obtain the modified graphene oxide.

[0046] In this embodiment, the mixing mass ratio of the liquid material and the powder material during use is 1:2.1.

[0047] The liquid preparation method in this embodiment is as follows: 1) Pre-emulsification: Add organosilicon monomers and fluorocarbon monomers to deionized water, stir at 500 rpm for 38 minutes to form a pre-emulsion; 2) Seed polymerization: The elastic acrylate seed emulsion was added to the reactor, heated to 75°C, and the pre-emulsion prepared in step 1) was added dropwise. The mixture was kept at the temperature for 2 hours to obtain a core-shell structured elastic acrylate-organosilicon-fluorocarbon ternary composite emulsion. 3) Post-crosslinking: Add the hydrolysis product of tetrabutyl orthosilicate to the emulsion obtained in step 2) and react for 1.5 h. After cooling, add sodium polycarboxylate dispersant, fatty acid polyethylene glycol dispersant, composite anti-aging agent, sodium bicarbonate microfoaming agent, citric acid microfoaming agent, aluminum sulfate coagulant, and penetrating epoxy resin. Stir at 900 r / min for 35 min to obtain liquid.

[0048] In this embodiment, the powder preparation method is as follows: nanoporous silica-micron-sized diatomite composite breathable material, modified graphene oxide, nanocellulose, sulfoaluminate cement, silicate cement, sodium sulfate, and quartz sand are added to a mixer and dry-mixed at a speed of 1300 r / min for 24 min to ensure uniform dispersion of the components and obtain the powder.

[0049] In this embodiment, the application method of the breathable polymer cement waterproof coating is as follows: at the construction site, the liquid and powder are added to the mixing equipment at a mass ratio of 1:2.1, and the mixture is stirred for 7 minutes at a temperature of 18℃ and a stirring speed of 1000r / min to obtain the finished breathable polymer cement waterproof coating. Example 4

[0050] The breathable polymer cement waterproof coating in this embodiment includes liquid and powder components. The liquid component is composed of the following raw materials in parts by weight: 78 parts of elastic acrylate-silicone-fluorocarbon ternary composite emulsion 4.2 parts of hydrolysis product of butyl orthosilicate 0.23 parts of sodium polycarboxylate dispersant 0.23 parts of fatty acid polyethylene glycol ester dispersant 0.65 parts of compound anti-aging additives Sodium bicarbonate foaming agent 0.55 parts Citric acid microfoaming agent 0.55 parts 0.16 parts of aluminum sulfate coagulant 2.5 parts of penetrating epoxy resin The elastic acrylate-silicone-fluorocarbon ternary composite emulsion is composed of the following raw materials in the following mass ratios: 28 parts of elastic acrylate seed emulsion 7.8 parts of organosilicon monomer 3.9 parts of fluorocarbon monomer 40 parts deionized water; The hydrolysis product of butyl orthosilicate is composed of the following raw materials in the following mass ratios: 0.7 parts of tetrabutyl orthosilicate 2.0 parts ethanol; The composite anti-aging additive is composed of the following raw materials in the following mass ratios: 0.32 parts of benzotriazole UV absorber 0.32 parts of hindered phenolic free radical scavenger; The powder is composed of the following raw materials in parts by weight: 21 parts of nanoporous silica-micron-sized diatomite composite breathable material 0.22 parts of modified graphene oxide 0.35 parts of nanocellulose 26 parts of sulfoaluminate cement 18 parts of silicate cement Sodium sulfate 4.2 parts 30 parts of 80-120 mesh quartz sand.

[0051] The nanoporous silica-micron-sized diatomaceous earth composite breathable material is composed of the following raw materials in the following mass ratios: 12 parts of nanoporous silica Eight portions of micron-sized diatomaceous earth.

[0052] The preparation method of the butyl orthosilicate hydrolysis product in this embodiment is as follows: Butyl orthosilicate was mixed with ethanol, and hydrochloric acid with a mass percentage concentration of 1.0% was added dropwise to adjust the pH to 3.5. The mixture was stirred at 650 rpm for 1.5 h at room temperature to obtain the hydrolysis product.

[0053] The modified graphene oxide described in this embodiment is prepared by dispersing graphene oxide and 3-aminopropyltriethoxysilane in deionized water at a mass ratio of 10:1.2, reacting at 65°C for 5 hours, and then filtering, washing, and drying to obtain the modified graphene oxide.

[0054] In this embodiment, the mixing mass ratio of the liquid material and the powder material during use is 1:2.1.

[0055] The liquid preparation method in this embodiment is as follows: 1) Pre-emulsification: Add organosilicon monomers and fluorocarbon monomers to deionized water, stir at 600 rpm for 37 minutes to form a pre-emulsion; 2) Seed polymerization: The elastic acrylate seed emulsion was added to the reactor, heated to 70°C, and the pre-emulsion prepared in step 1) was added dropwise. The mixture was kept at the temperature for 2.5 h to obtain a core-shell structured elastic acrylate-organosilicon-fluorocarbon ternary composite emulsion. 3) Post-crosslinking: Add the hydrolysis product of butyl orthosilicate to the emulsion obtained in step 2) and react for 1.5 h. After cooling, add sodium polycarboxylate dispersant, fatty acid polyethylene glycol dispersant, composite anti-aging agent, sodium bicarbonate microfoaming agent, citric acid microfoaming agent, aluminum sulfate coagulant, and penetrating epoxy resin. Stir at 920 r / min for 38 min to obtain liquid.

[0056] In this embodiment, the powder preparation method is as follows: nanoporous silica-micron-sized diatomite composite breathable material, modified graphene oxide, nanocellulose, sulfoaluminate cement, silicate cement, sodium sulfate, and quartz sand are added to a mixer and dry-mixed at a speed of 1350 r / min for 26 min to ensure uniform dispersion of the components and obtain the powder.

[0057] In this embodiment, the application method of the breathable polymer cement waterproof coating is as follows: at the construction site, the liquid and powder are added to the mixing equipment at a mass ratio of 1:2.1, and the mixture is stirred for 8 minutes at a temperature of 25°C and a stirring speed of 1050 r / min to obtain the finished breathable polymer cement waterproof coating. Example 5

[0058] The breathable polymer cement waterproof coating in this embodiment includes liquid and powder components. The liquid component is composed of the following raw materials in parts by weight: 80 parts of elastic acrylate-silicone-fluorocarbon ternary composite emulsion 4.5 parts of hydrolysis product of butyl orthosilicate 0.25 parts of sodium polycarboxylate dispersant 0.25 parts of fatty acid polyethylene glycol ester dispersant 0.7 parts of compound anti-aging additives 0.55 parts sodium bicarbonate microfoaming agent Citric acid microfoaming agent 0.55 parts 0.18 parts of aluminum sulfate coagulant 2.6 parts of penetrating epoxy resin The elastic acrylate-silicone-fluorocarbon ternary composite emulsion is composed of the following raw materials in the following mass ratios: 28 parts of elastic acrylate seed emulsion 8 parts of organosilicon monomer 4 parts of fluorocarbon monomer 40 parts deionized water; The hydrolysis product of butyl orthosilicate is composed of the following raw materials in the following mass ratios: 0.7 parts of tetrabutyl orthosilicate 3.0 parts ethanol; The composite anti-aging additive is composed of the following raw materials in the following mass ratios: 0.34 parts of benzotriazole UV absorber 0.34 parts of hindered phenolic free radical scavenger; The powder is composed of the following raw materials in parts by weight: 22 parts of nanoporous silica-micron-sized diatomite composite breathable material 0.25 parts of modified graphene oxide 0.4 parts of nanocellulose 28 parts of sulfoaluminate cement 19 parts of silicate cement Sodium sulfate 4.5 parts 40 parts of 80-120 mesh quartz sand.

[0059] The nanoporous silica-micron-sized diatomaceous earth composite breathable material is composed of the following raw materials in the following mass ratios: 12 parts of nanoporous silica Eight portions of micron-sized diatomaceous earth.

[0060] The preparation method of the butyl orthosilicate hydrolysis product in this embodiment is as follows: Butyl orthosilicate was mixed with ethanol, and hydrochloric acid with a mass percentage concentration of 1.0% was added dropwise to adjust the pH to 3.5. The mixture was stirred at 650 rpm for 1.5 h at room temperature to obtain the hydrolysis product.

[0061] The modified graphene oxide described in this embodiment is prepared by dispersing graphene oxide and 3-aminopropyltriethoxysilane in deionized water at a mass ratio of 10:1.3, reacting at 65°C for 5 hours, and then filtering, washing, and drying to obtain the modified graphene oxide.

[0062] In this embodiment, the mixing mass ratio of the liquid material and the powder material during use is 1:2.2.

[0063] The liquid preparation method in this embodiment is as follows: 1) Pre-emulsification: Add organosilicon monomers and fluorocarbon monomers to deionized water, stir at 700 rpm for 36 minutes to form a pre-emulsion; 2) Seed polymerization: The elastic acrylate seed emulsion was added to the reactor, heated to 70°C, and the pre-emulsion prepared in step 1) was added dropwise. The mixture was kept at the temperature for 2.5 h to obtain a core-shell structured elastic acrylate-organosilicon-fluorocarbon ternary composite emulsion. 3) Post-crosslinking: Add the hydrolysis product of tetrabutyl orthosilicate to the emulsion obtained in step 2) and react for 1.5 h. After cooling, add sodium polycarboxylate dispersant, fatty acid polyethylene glycol dispersant, composite anti-aging agent, sodium bicarbonate microfoaming agent, citric acid microfoaming agent, aluminum sulfate coagulant, and penetrating epoxy resin. Stir at 950 r / min for 42 min to obtain liquid.

[0064] In this embodiment, the powder preparation method is as follows: nanoporous silica-micron-sized diatomite composite breathable material, modified graphene oxide, nanocellulose, sulfoaluminate cement, silicate cement, sodium sulfate, and quartz sand are added to a mixer and dry-mixed at a speed of 1400 r / min for 28 min to ensure uniform dispersion of the components and obtain the powder.

[0065] In this embodiment, the application method of the breathable polymer cement waterproof coating is as follows: at the construction site, the liquid and powder are added to the mixing equipment at a mass ratio of 1:2.2, and the mixture is stirred for 9 minutes at a temperature of 30°C and a stirring speed of 1100 r / min to obtain the finished breathable polymer cement waterproof coating. Example 6

[0066] The breathable polymer cement waterproof coating in this embodiment includes liquid and powder components. The liquid component is composed of the following raw materials in parts by weight: 82 parts of elastic acrylate-silicone-fluorocarbon ternary composite emulsion 4.8 parts of hydrolysis product of butyl orthosilicate 0.3 parts of sodium polycarboxylate dispersant 0.3 parts of fatty acid polyethylene glycol ester dispersant 0.75 parts of compound anti-aging additives Sodium bicarbonate microfoaming agent 0.58 parts Citric acid microfoaming agent 0.58 parts 0.19 parts of aluminum sulfate coagulant 2.8 parts of penetrating epoxy resin The elastic acrylate-silicone-fluorocarbon ternary composite emulsion is composed of the following raw materials in the following mass ratios: 28.7 parts of elastic acrylate seed emulsion 8.2 parts of organosilicon monomer 4.1 parts of fluorocarbon monomer 41 parts of deionized water; The hydrolysis product of butyl orthosilicate is composed of the following raw materials in the following mass ratios: 0.7 parts of tetrabutyl orthosilicate 3.5 parts ethanol; The composite anti-aging additive is composed of the following raw materials in the following mass ratios: 0.36 parts of benzotriazole UV absorber 0.36 parts of hindered phenolic free radical scavenger; The powder is composed of the following raw materials in parts by weight: 24 parts of nanoporous silica-micron-sized diatomite composite breathable material 0.28 parts of modified graphene oxide 0.45 parts of nanocellulose 29 parts of sulfoaluminate cement 19.5 parts of silicate cement Sodium sulfate 4.8 parts 25 parts of 80-120 mesh quartz sand.

[0067] The nanoporous silica-micron-sized diatomaceous earth composite breathable material is composed of the following raw materials in the following mass ratios: 12 parts of nanoporous silica Eight portions of micron-sized diatomaceous earth.

[0068] The preparation method of the butyl orthosilicate hydrolysis product in this embodiment is as follows: Butyl orthosilicate was mixed with ethanol, and hydrochloric acid with a mass percentage concentration of 1.0% was added dropwise to adjust the pH to 4. The mixture was stirred at 650 rpm for 1.5 h at room temperature to obtain the hydrolysis product.

[0069] The modified graphene oxide described in this embodiment is prepared by dispersing graphene oxide and 3-aminopropyltriethoxysilane in deionized water at a mass ratio of 10:1.2, reacting at 65°C for 5 hours, and then filtering, washing, and drying to obtain the modified graphene oxide.

[0070] In this embodiment, the mixing mass ratio of the liquid material and the powder material during use is 1:2.2.

[0071] The liquid preparation method in this embodiment is as follows: 1) Pre-emulsification: Add organosilicon monomers and fluorocarbon monomers to deionized water, stir at 800 rpm for 35 minutes to form a pre-emulsion; 2) Seed polymerization: The elastic acrylate seed emulsion was added to the reactor, heated to 70°C, and the pre-emulsion prepared in step 1) was added dropwise. The mixture was kept at the temperature for 2.5 h to obtain a core-shell structured elastic acrylate-organosilicon-fluorocarbon ternary composite emulsion. 3) Post-crosslinking: Add the hydrolysis product of tetrabutyl orthosilicate to the emulsion obtained in step 2) and react for 1.5 h. After cooling, add sodium polycarboxylate dispersant, fatty acid polyethylene glycol dispersant, composite anti-aging agent, sodium bicarbonate microfoaming agent, citric acid microfoaming agent, aluminum sulfate coagulant, and penetrating epoxy resin. Stir at 980 r / min for 43 min to obtain liquid.

[0072] In this embodiment, the powder preparation method is as follows: nanoporous silica-micron-sized diatomite composite breathable material, modified graphene oxide, nanocellulose, sulfoaluminate cement, silicate cement, sodium sulfate, and quartz sand are added to a mixer and dry-mixed at a speed of 1450 r / min for 29 min to ensure uniform dispersion of the components and obtain the powder.

[0073] In this embodiment, the application method of the breathable polymer cement waterproof coating is as follows: the liquid material and the powder material are mixed at a mass ratio of 1:2.2, and stirred for 9.5 minutes at 32℃ and 1150r / min to obtain the finished breathable polymer cement waterproof coating. Example 7

[0074] The breathable polymer cement waterproof coating in this embodiment includes liquid and powder components. The liquid component is composed of the following raw materials in parts by weight: 85 parts of elastic acrylate-silicone-fluorocarbon ternary composite emulsion 5.0 parts of hydrolysis product of butyl orthosilicate 0.3 parts of sodium polycarboxylate dispersant 0.3 parts of fatty acid polyethylene glycol ester dispersant 0.8 parts of compound anti-aging additives 0.6 parts sodium bicarbonate microfoaming agent Citric acid microfoaming agent 0.6 parts 0.2 parts of aluminum sulfate coagulant 3.0 parts of penetrating epoxy resin The elastic acrylate-silicone-fluorocarbon ternary composite emulsion is composed of the following raw materials in the following mass ratios: 34 parts of elastic acrylate seed emulsion 10 parts of organosilicon monomer 5 parts of fluorocarbon monomer 45 parts deionized water; The hydrolysis product of butyl orthosilicate is composed of the following raw materials in the following mass ratios: 1 part of tetrabutyl orthosilicate 2.5 parts ethanol; The composite anti-aging additive is composed of the following raw materials in the following mass ratios: 0.37 parts of benzotriazole UV absorber 0.37 parts of hindered phenolic free radical scavenger; The powder is composed of the following raw materials in parts by weight: 25 parts of nanoporous silica-micron-sized diatomite composite breathable material 0.3 parts of modified graphene oxide 0.5 parts of nanocellulose 30 parts of sulfoaluminate cement 20 parts of silicate cement Sodium sulfate 5.0 parts 15 parts of 80-120 mesh quartz sand.

[0075] The nanoporous silica-micron-sized diatomaceous earth composite breathable material is composed of the following raw materials in the following mass ratios: 15 parts of nanoporous silica 10 parts of micron-sized diatomaceous earth.

[0076] The preparation method of the butyl orthosilicate hydrolysis product in this embodiment is as follows: Butyl orthosilicate was mixed with ethanol, and hydrochloric acid with a mass percentage concentration of 1.2% was added dropwise to adjust the pH to 4. The mixture was stirred at 800 rpm for 2 hours at room temperature to obtain the hydrolysis product.

[0077] The modified graphene oxide method described in this embodiment is as follows: graphene oxide and 3-aminopropyltriethoxysilane are dispersed in deionized water at a mass ratio of 10:1.5, reacted at 70°C for 6 hours, and then filtered, washed, and dried to obtain the modified graphene oxide.

[0078] In this embodiment, the mixing mass ratio of the liquid material and the powder material during use is 1:2.3.

[0079] The liquid preparation method in this embodiment is as follows: 1) Pre-emulsification: Add organosilicon monomers and fluorocarbon monomers to deionized water, stir at 900 rpm for 34 min to form a pre-emulsion; 2) Seed polymerization: The elastic acrylate seed emulsion was added to the reactor, heated to 65°C, and the pre-emulsion prepared in step 1) was added dropwise. The mixture was kept at the temperature for 3 hours to obtain a core-shell structured elastic acrylate-organosilicon-fluorocarbon ternary composite emulsion. 3) Post-crosslinking: Add the hydrolysis product of tetrabutyl orthosilicate to the emulsion obtained in step 2) and react for 1.5 h. After cooling, add sodium polycarboxylate dispersant, fatty acid polyethylene glycol dispersant, composite anti-aging agent, sodium bicarbonate microfoaming agent, citric acid microfoaming agent, aluminum sulfate coagulant, and penetrating epoxy resin. Stir at 1000 r / min for 45 min to obtain liquid.

[0080] In this embodiment, the powder preparation method is as follows: nanoporous silica-micron-sized diatomite composite breathable material, modified graphene oxide, nanocellulose, sulfoaluminate cement, silicate cement, sodium sulfate, and quartz sand are added to a mixer and dry-mixed at a speed of 1500 r / min for 30 min to ensure uniform dispersion of the components and obtain the powder.

[0081] In this embodiment, the application method of the breathable polymer cement waterproof coating is as follows: the liquid material and the powder material are mixed at a mass ratio of 1:2.3, and stirred for 10 minutes at 35°C and 1200r / min to obtain the finished breathable polymer cement waterproof coating. Example 8

[0082] The breathable polymer cement waterproof coating in this embodiment includes liquid and powder components. The liquid component is composed of the following raw materials in parts by weight: 72 parts of elastic acrylate-silicone-fluorocarbon ternary composite emulsion 3.2 parts of hydrolysis product of butyl orthosilicate 0.16 parts of sodium polycarboxylate dispersant 0.16 parts of fatty acid polyethylene glycol ester dispersant 0.52 parts of compound anti-aging additives Sodium bicarbonate microfoaming agent 0.43 parts Citric acid microfoaming agent 0.43 parts 0.11 parts of aluminum sulfate coagulant 2.1 parts of penetrating epoxy resin The elastic acrylate-silicone-fluorocarbon ternary composite emulsion is composed of the following raw materials in the following mass ratios: 25.2 parts of elastic acrylate seed emulsion 7.2 parts of organosilicon monomer 3.6 parts of fluorocarbon monomer 36 parts of deionized water; The hydrolysis product of butyl orthosilicate is composed of the following raw materials in the following mass ratios: 1 part of tetrabutyl orthosilicate 3.5 parts ethanol; The composite anti-aging additive is composed of the following raw materials in the following mass ratios: 0.38 parts of benzotriazole UV absorber 0.38 parts of hindered phenolic free radical scavenger; The powder is composed of the following raw materials in parts by weight: 16 parts of nanoporous silica-micron-sized diatomite composite breathable material 0.12 parts of modified graphene oxide 0.15 parts of nanocellulose 21 parts of sulfoaluminate cement 15.5 parts of silicate cement 3.2 parts sodium sulfate 30 parts of 80-120 mesh quartz sand.

[0083] The nanoporous silica-micron-sized diatomaceous earth composite breathable material is composed of the following raw materials in the following mass ratios: 15 parts of nanoporous silica 10 parts of micron-sized diatomaceous earth.

[0084] The preparation method of the butyl orthosilicate hydrolysis product in this embodiment is as follows: Butyl orthosilicate was mixed with ethanol, and hydrochloric acid with a mass percentage concentration of 1.2% was added dropwise to adjust the pH to 4. The mixture was stirred at 800 rpm for 2 hours at room temperature to obtain the hydrolysis product.

[0085] The modified graphene oxide method described in this embodiment is as follows: graphene oxide and 3-aminopropyltriethoxysilane are dispersed in deionized water at a mass ratio of 10:1.5, reacted at 70°C for 6 hours, and then filtered, washed, and dried to obtain the modified graphene oxide.

[0086] In this embodiment, the mixing mass ratio of the liquid material and the powder material during use is 1:2.3.

[0087] The liquid preparation method in this embodiment is as follows: 1) Pre-emulsification: Add organosilicon monomers and fluorocarbon monomers to deionized water at a speed of 1000 rpm and stir for 30 minutes to form a pre-emulsion; 2) Seed polymerization: The elastic acrylate seed emulsion was added to the reactor, heated to 65°C, and the pre-emulsion prepared in step 1) was added dropwise. The mixture was kept at the temperature for 3 hours to obtain a core-shell structured elastic acrylate-organosilicon-fluorocarbon ternary composite emulsion. 3) Post-crosslinking: Add the hydrolysis product of tetrabutyl orthosilicate to the emulsion obtained in step 2) and react for 1.2 h. After cooling, add sodium polycarboxylate dispersant, fatty acid polyethylene glycol dispersant, composite anti-aging agent, sodium bicarbonate microfoaming agent, citric acid microfoaming agent, aluminum sulfate coagulant, and penetrating epoxy resin. Stir at 820 r / min for 31 min to obtain liquid.

[0088] In this embodiment, the powder preparation method is as follows: nanoporous silica-micron-sized diatomite composite breathable material, modified graphene oxide, nanocellulose, sulfoaluminate cement, silicate cement, sodium sulfate, and quartz sand are added to a mixer and dry-mixed at a speed of 1220 r / min for 21 min to ensure uniform dispersion of the components and obtain the powder.

[0089] In this embodiment, the application method of the breathable polymer cement waterproof coating is as follows: the liquid material and the powder material are mixed at a mass ratio of 1:2.3, and stirred for 5.5 minutes at 8℃ and 850r / min to obtain the finished breathable polymer cement waterproof coating. Example 9

[0090] The breathable polymer cement waterproof coating in this embodiment includes liquid and powder components. The liquid component is composed of the following raw materials in parts by weight: 79 parts of elastic acrylate-silicone-fluorocarbon ternary composite emulsion 4.6 parts of hydrolysis product of butyl orthosilicate 0.24 parts of sodium polycarboxylate dispersant 0.24 parts of fatty acid polyethylene glycol ester dispersant 0.72 parts of compound anti-aging additives Sodium bicarbonate microfoaming agent 0.54 Citric acid microfoaming agent 0.54 parts 0.17 parts of aluminum sulfate coagulant 2.7 parts of penetrating epoxy resin The elastic acrylate-silicone-fluorocarbon ternary composite emulsion is composed of the following raw materials in the following mass ratios: 28 parts of elastic acrylate seed emulsion 8 parts of organosilicon monomer 4 parts of fluorocarbon monomer 40 parts deionized water; The hydrolysis product of butyl orthosilicate is composed of the following raw materials in the following mass ratios: 1 part of tetrabutyl orthosilicate 4.5 parts ethanol; The composite anti-aging additive is composed of the following raw materials in the following mass ratios: 0.4 parts of benzotriazole UV absorber 0.4 parts of hindered phenolic free radical scavenger; The powder is composed of the following raw materials in parts by weight: 23 parts of nanoporous silica-micron-sized diatomite composite breathable material 0.26 parts of modified graphene oxide 0.42 parts of nanocellulose 27 parts of sulfoaluminate cement 18.5 parts of silicate cement Sodium sulfate 4.6 parts 40 parts of 80-120 mesh quartz sand.

[0091] The nanoporous silica-micron-sized diatomaceous earth composite breathable material is composed of the following raw materials in the following mass ratios: 15 parts of nanoporous silica 10 parts of micron-sized diatomaceous earth.

[0092] The preparation method of the butyl orthosilicate hydrolysis product in this embodiment is as follows: Butyl orthosilicate was mixed with ethanol, and hydrochloric acid with a mass percentage concentration of 1.2% was added dropwise to adjust the pH to 4. The mixture was stirred at 800 rpm for 2 hours at room temperature to obtain the hydrolysis product.

[0093] The modified graphene oxide method described in this embodiment is as follows: graphene oxide and 3-aminopropyltriethoxysilane are dispersed in deionized water at a mass ratio of 10:1.5, reacted at 70°C for 6 hours, and then filtered, washed, and dried to obtain the modified graphene oxide.

[0094] In this embodiment, the mixing mass ratio of the liquid material and the powder material during use is 1:2.2.

[0095] The liquid preparation method in this embodiment is as follows: 1) Pre-emulsification: Add organosilicon monomers and fluorocarbon monomers to deionized water, stir at 900 rpm for 32 minutes to form a pre-emulsion; 2) Seed polymerization: The elastic acrylate seed emulsion was added to the reactor, heated to 65°C, and the pre-emulsion prepared in step 1) was added dropwise. The mixture was kept at the temperature for 3 hours to obtain a core-shell structured elastic acrylate-organosilicon-fluorocarbon ternary composite emulsion. 3) Post-crosslinking: Add the hydrolysis product of tetrabutyl orthosilicate to the emulsion obtained in step 2) and react for 1.2 h. After cooling, add sodium polycarboxylate dispersant, fatty acid polyethylene glycol dispersant, composite anti-aging agent, sodium bicarbonate microfoaming agent, citric acid microfoaming agent, aluminum sulfate coagulant, and penetrating epoxy resin. Stir at 960 r / min for 40 min to obtain liquid.

[0096] In this embodiment, the powder preparation method is as follows: nanoporous silica-micron-sized diatomite composite breathable material, modified graphene oxide, nanocellulose, sulfoaluminate cement, silicate cement, sodium sulfate, and quartz sand are added to a mixer and dry-mixed at a speed of 1380 r / min for 27 min to ensure uniform dispersion of the components and obtain the powder.

[0097] In this embodiment, the application method of the breathable polymer cement waterproof coating is as follows: the liquid material and the powder material are mixed at a mass ratio of 1:2.2, and stirred for 8.5 minutes at 28℃ and 1080r / min to obtain the finished breathable polymer cement waterproof coating.

[0098] The samples obtained in all the above embodiments were tested. The testing methods and standards are as follows: Water vapor permeation density: tested according to GB / T17146-2015; Impermeability: Tested according to GB / T23445-2009; Bond strength: Tested according to GB / T23445-2009; Tensile strength and elongation at break: tested according to GB / T16777-2008; Low-temperature bending performance: tested according to GB / T16777-2008; UV aging test: After aging for 3750 hours according to GB / T1865-2009, the tensile strength retention rate is tested. Hazardous substances: tested according to GB45671-2025.

[0099] The test results for physical properties are shown in the table below:

[0100] The results of the tests for hazardous substance limits are shown in the table below:

[0101] The data above shows that all nine waterproof coating samples prepared in the embodiments meet the design requirements of this invention, and the core performance indicators are stable, verifying the design goal of synergistic improvement in "vapor permeability, waterproofness, toughness, durability, environmental protection, and construction". Among them, with the gradual increase of the amount of ternary composite emulsion, nanoporous silica-micron-sized diatomite composite vapor-permeable material, modified graphene oxide, and penetrating epoxy resin, the vapor permeability, waterproofness, mechanical properties, and weather resistance are improved simultaneously (e.g., Example 7 has the best performance), proving the rationality of the organic-inorganic interpenetrating network and gradient structure design, and the core components synergistically enhance the overall performance of the coating.

[0102] The examples show that stable finished products can be prepared in a temperature range of 5-35℃. Combined with the role of aluminum sulfate accelerator, the application adaptability of the coating under different working conditions such as low temperature (5℃) and normal temperature is verified, and it is suitable for various mixing process requirements.

[0103] This invention achieves a water vapor permeability density of ≥50g / m²·24h and a water impermeability of ≥0.4MPa / 30min through the design of a “ternary composite emulsion dense surface layer + micro-nano interconnected pore middle layer”, thus completely solving the core contradiction of “vapor permeability inevitably reduces waterproofness” in existing technologies, and optimizing the synergistic performance of vapor permeability and waterproofness.

[0104] This invention utilizes the synergistic effect of organic-inorganic interpenetrating networks and modified graphene oxides to achieve a coating tensile strength ≥2.0MPa, elongation at break ≥40%, and no cracks when bent at -10℃. The addition of composite anti-aging additives ensures that the tensile strength retention rate is ≥90% after 3750h of UV aging, and it can withstand 20 freeze-thaw cycles (-20℃-50℃) without damage. Its service life is extended by more than 50% compared to traditional products, and its mechanical properties and durability are significantly improved.

[0105] This invention utilizes the chemical bonding between the bottom-penetrating epoxy resin and cement hydration products to achieve a coating bond strength of ≥1.8MPa with the concrete substrate (30% higher than existing products), and significantly improves its toughness.

[0106] The introduction of a accelerator in this invention enables normal curing at low temperatures of 5-10℃, with a surface drying time of ≤4h and a complete drying time of ≤12h. It can be applied directly when the substrate moisture content is ≤15%. It supports multiple application methods such as scraping, rolling, and spraying, and is suitable for complex construction scenarios, resulting in good economic and social benefits.

[0107] This invention employs an APEO-free dispersion system and environmentally friendly additives. The VOC content of all products in the embodiments is ≤10g / L (far superior to the industry standard requirement of 20g / L). The VOC content is much lower than the industry standard, and it also takes into account high breathability and high waterproof properties. It can be adapted to various scenarios such as external wall insulation and ultra-low energy consumption buildings. It is free of heavy metals and formaldehyde, meets green building standards, and its superior environmental protection further proves the economic and social benefits of this invention.

[0108] The pre-emulsification-seed polymerization process and the optimization of the compound dispersion system adopted in this invention enable the liquid material to have a storage stability of ≥6 months and the powder material to have no stratification and sedimentation. The excellent storage stability solves the problem of poor compatibility of traditional products.

[0109] The product of this invention is applicable to various scenarios such as external wall insulation systems, passive ultra-low energy buildings, kitchens and bathrooms, underground garages, and old building repairs. In particular, it meets the dual requirements of high-level waterproofing and breathable moisture-proofing, and has a wide range of applications and significant economic and social benefits.

[0110] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A breathable polymer cement waterproof coating, characterized in that: It consists of liquid and powder, wherein: The liquid material is mainly composed of the following raw materials in the following mass ratios: 70-85 parts of elastic acrylate-silicone-fluorocarbon ternary composite emulsion 3-5 parts of butyl orthosilicate hydrolysis product Sodium polycarboxylate dispersant: 0.1-0.3 parts 0.1-0.3 parts of fatty acid polyethylene glycol ester dispersant 0.5-0.8 parts of compound anti-aging additives Sodium bicarbonate microfoaming agent 0.4-0.6 parts Citric acid microfoaming agent 0.4-0.6 parts 0.1-0.2 parts of aluminum sulfate coagulant. 2-3 parts of penetrating epoxy resin The elastic acrylate-silicone-fluorocarbon ternary composite emulsion is composed of the following raw materials in the following mass ratios: 24-34 parts of elastic acrylate seed emulsion 7-10 parts of organosilicon monomer 3-5 parts of fluorocarbon monomer 35-45 parts deionized water; The hydrolysis product of butyl orthosilicate is composed of the following raw materials in the following mass ratios: 0.5-1 part of butyl orthosilicate 1.5-4.5 parts ethanol; The composite anti-aging additive is composed of the following raw materials in the following mass ratios: 0.25-0.4 parts of benzotriazole UV absorber 0.25-0.4 parts of hindered phenolic free radical scavenger; The powder is mainly composed of the following raw materials in the following mass ratios: 15-25 parts of nanoporous silica-micron-sized diatomite composite breathable material 0.1-0.3 parts of modified graphene oxide 0.1-0.5 parts of nanocellulose 20-30 parts of sulfoaluminate cement 15-20 parts of silicate cement 3-5 parts sodium sulfate 10-40 parts of quartz sand The nanoporous silica-micron-sized diatomaceous earth composite breathable material is composed of the following raw materials in the following mass ratios: 9-15 parts of nanoporous silica 6-10 parts of micron-sized diatomaceous earth.

2. The breathable polymer cement waterproof coating according to claim 1, characterized in that: The organosilicon monomer in the elastic acrylate-organosilicon-fluorocarbon ternary composite emulsion is γ-methacryloyloxypropyltrimethoxysilane, and the fluorocarbon monomer is fluorinated acrylate.

3. The breathable polymer cement waterproof coating according to claim 1, characterized in that: The preparation method of the butyl orthosilicate hydrolysis product is as follows: butyl orthosilicate is mixed with ethanol, and hydrochloric acid with a mass percentage concentration of 0.8%-1.2% is added dropwise to adjust the pH to 3-4. The mixture is stirred at 500-800 rpm for 1-2 hours at room temperature to obtain the hydrolysis product.

4. The breathable polymer cement waterproof coating according to claim 1, characterized in that: The nanoporous silica-micron-sized diatomite composite breathable material has a nanoporous silica particle size of 20-50 nm and a micron-sized diatomite particle size of 5-10 μm.

5. The breathable polymer cement waterproof coating according to claim 1, characterized in that: The modified graphene oxide is an aminated modified graphene oxide. The modification method is as follows: graphene oxide and 3-aminopropyltriethoxysilane are dispersed in deionized water at a mass ratio of 10:1-1.5, reacted at 60-70℃ for 4-6 hours, and obtained by filtration, washing and drying.

6. The breathable polymer cement waterproof coating according to claim 1, characterized in that: The silicate cement has a particle size ≤ 5 μm and a compressive strength ≥ 42.5 MPa.

7. The breathable polymer cement waterproof coating according to claim 1, characterized in that: The quartz sand has a particle size of 80-120 mesh.

8. The breathable polymer cement waterproof coating according to claim 1, characterized in that: The mixing mass ratio of the liquid and powder materials during use is 1:2.0-2.

3.

9. A method for preparing a breathable polymer cement waterproof coating according to any one of claims 1-8, characterized in that: Preparation methods including liquid and powder materials: The preparation method of the liquid material includes the following steps performed in sequence: 1) Pre-emulsification: Add organosilicon monomers and fluorocarbon monomers to deionized water, stir at 300-1000 rpm for 30-40 minutes to form a pre-emulsion; 2) Seed polymerization: The elastic acrylate seed emulsion is added to the reactor, heated to 65℃-75℃, and the pre-emulsion prepared in step 1) is added dropwise. The mixture is kept at the temperature for 2-3 hours to obtain a core-shell structured elastic acrylate-organosilicon-fluorocarbon ternary composite emulsion. 3) Post-crosslinking: Add the hydrolysis product of butyl orthosilicate to the emulsion obtained in step 2) and react for 1-1.5 h. After cooling, add sodium polycarboxylate dispersant, fatty acid polyethylene glycol dispersant, composite anti-aging agent, sodium bicarbonate microfoaming agent, citric acid microfoaming agent, aluminum sulfate coagulant, and penetrating epoxy resin. Stir at 800-1000 r / min for 30-45 min to obtain liquid. The powder preparation method is as follows: add nanoporous silica-micron-sized diatomite composite breathable material, modified graphene oxide, nanocellulose, sulfoaluminate cement, silicate cement, sodium sulfate, and quartz sand into a mixer, and dry mix at a speed of 1200-1500 r / min for 20-30 min to ensure uniform dispersion of the components to obtain the powder.

10. The method of using a breathable polymer cement waterproof coating according to any one of claims 1-8, characterized in that: At the construction site, the liquid and powder materials are added to the mixing equipment at a mass ratio of 1:2.0-2.

3. The mixture is stirred for 5-10 minutes at a temperature of 5-35℃ and a stirring speed of 800-1200 r / min to obtain the breathable polymer cement waterproof coating.

Images