High-weather-resistance anti-alkali-return long-shelf-life cement-based ceramic tile adhesive and preparation method thereof

Abstract

This invention discloses a high weather-resistant, alkali-resistant, long-shelf-life cement-based tile adhesive and its preparation method. By weight, it comprises the following components: 32-39 parts silicate cement, 37-48 parts mineral composite aggregate, 2.0-4.5 parts redispersible latex powder, 0-2.0 parts silicone-acrylic modified latex powder, 0.2-0.35 parts cellulose ether, 0.2-0.5 parts plant-based water-retaining colloid, 1.5-3.5 parts mineral fiber, 0.5-1.5 parts nano-reinforcing powder, 0.5-1.2 parts siliceous tempering functional component, 3-7 parts activated zeolite powder, 1.5-3.0 parts modified bentonite, 0.2-0.5 parts calcium stearate, 0.4-0.8 parts calcium formate, 0.1-0.25 parts polycarboxylate superplasticizer, 0.15-0.35 parts silicone powder, and 0.1-0.2 parts powder defoamer. The beneficial effects are: the material has excellent bonding performance, anti-slip properties, and long open paving time, while also having the characteristics of strong resistance to alkali return, resistance to drying shrinkage and cracking, weather resistance and durability, the powder is not easy to absorb moisture and clump, and has a long shelf life; the preparation method is stable and compatible with conventional dry powder mortar production lines, and different compatible grades of products can be produced on the same line, with strong controllability in mass production.

Description

Technical Field

[0001] This invention relates to the field of building tile adhesive materials technology, specifically to a high weather-resistant, alkali-resistant, long-shelf-life cement-based tile adhesive and its preparation method. Background Technology

[0002] With the widespread adoption of thin-set application techniques in the building decoration industry, cement-based tile adhesive has become an indispensable core dry powder building material for indoor and outdoor tile, vitrified tile, and slab laying. It is widely used in various building scenarios, including residential buildings, commercial projects, exterior curtain walls, underfloor heating systems, garden roofs, damp basements, and high-humidity areas in South China. Compared to traditional thick-set cement mortar techniques, thin-set application of tile adhesive offers advantages such as lower material consumption, stronger adhesion, thinner application thickness, higher construction efficiency, and reduced susceptibility to hollow spots and detachment, making it the mainstream construction method in the industry.

[0003] Currently available general-purpose cement-based tile adhesives still suffer from numerous industry-wide shortcomings and regional adaptability deficiencies. Firstly, ordinary-grade tile adhesives have simple formulations, limited functional additives, and generally low overall bonding strength, only suitable for indoor installation of standard small-sized tiles. Furthermore, when the wall substrate has high moisture content or significant shrinkage and deformation, common quality problems such as hollowing, warping, and complete tile detachment are highly likely to occur later, leading to high repair rates and increased project maintenance costs.

[0004] Secondly, coastal areas have high humidity, large temperature differences between day and night, and long periods of rainy season and humid weather. The moisture in the environment can easily penetrate into the tile adhesive, causing free alkali, a product of cement hydration, to migrate with the moisture to the surface of the tiles and walls, resulting in surface defects such as efflorescence, whitening, frosting, and uneven tiles, which seriously affect the aesthetics of the decoration. At the same time, traditional tile adhesive is prone to internal micro-shrinkage and micro-crack extension in high humidity environments. After long-term alternation of dry and wet conditions, it is easy to cause surface powdering and interface delamination, which greatly shortens the service life of the decorative system.

[0005] Furthermore, existing tile adhesives generally have poor powder storage stability, lack dedicated moisture-proof and anti-caking mineral components in their formulations, and use conventional packaging. During warehouse storage, long-distance transportation, and storage in the rainy season, they are extremely prone to absorbing moisture, resulting in powder clumping and premature local hydration. Once moisture absorption and deterioration occur, it will directly lead to poor workability, difficulty in mixing, shortened open laying time, easy slippage on the wall, and a significant reduction in bonding strength, failing to meet national standards and causing a large amount of material waste and construction disputes.

[0006] In addition, traditional reinforced tile adhesives, in pursuit of high bonding strength and weather resistance, generally increase the amount of high-cost polymer raw materials such as redispersible latex powder significantly, resulting in high formulation costs, small profit margins for small and medium-sized enterprises in mass production, and low market cost-effectiveness. At the same time, conventional formulations have a single water retention system, relying solely on a single cellulose ether for water retention. Under the conditions of high temperature and dry substrate in summer and outdoor wall exposure, water loss is too rapid, the initial setting of the mortar is accelerated, the working time is short, and the adjustment window for laying is insufficient. This makes it very easy to produce air bubbles, hollows, runs, and slippage, making it difficult to adapt to harsh working conditions such as outdoor walls, rooftop exposure, and alternating hot and cold cycles of underfloor heating.

[0007] At the same time, most existing tile adhesives can only be formulated for either ordinary or enhanced grades. The two grades cannot be produced flexibly on the same production line, resulting in frequent equipment debugging on the production line, high inventory pressure, and high production management costs. Moreover, most products only focus on initial bonding strength and lack multi-dimensional collaborative design from the perspectives of water retention and toughening, pore density, fiber bonding, alkali sealing, and moisture-proof and powder-stabilizing. Their comprehensive weather resistance performance, such as crack resistance, freeze-thaw resistance, aging resistance, and rain immersion resistance, is insufficient, making it difficult to meet the dual needs of ordinary home decoration and high weather resistance in commercial outdoor applications. Summary of the Invention

[0008] The technical problem to be solved by this invention is to overcome the shortcomings of the prior art and provide a cement-based tile adhesive with high weather resistance, anti-alkali reversion, and long shelf life. It takes into account excellent bonding performance, anti-slip properties, and long open laying time, while also having the characteristics of strong anti-alkali reversion, anti-drying shrinkage cracking, weather resistance and durability, non-hygroscopic powder clumping, and long shelf life. Another technical problem to be solved by this invention is to provide a preparation method for the cement-based tile adhesive. The process is stable, compatible with conventional dry powder mortar production lines, and can produce different compatible grades of products on the same line. Mass production is highly controllable, as detailed below.

[0009] To achieve the above objectives, the present invention provides the following technical solution: This invention provides a high weather-resistant, alkali-resistant, and long-shelf-life cement-based tile adhesive, comprising the following components by weight: 32-39 parts silicate cement, 37-48 parts mineral composite aggregate, 2.0-4.5 parts redispersible latex powder, 0-2.0 parts silicone-acrylic modified latex powder, 0.2-0.35 parts cellulose ether, 0.2-0.5 parts plant water-retaining colloid, 1.5-3.5 parts mineral fiber, 0.5-1.5 parts nano-reinforcing powder, 0.5-1.2 parts siliceous tempering functional component, 3-7 parts activated zeolite powder, 1.5-3.0 parts modified bentonite, 0.2-0.5 parts calcium stearate, 0.4-0.8 parts calcium formate, 0.1-0.25 parts polycarboxylate superplasticizer, 0.15-0.35 parts silicone powder, and 0.1-0.2 parts powder defoamer.

[0010] Preferably, the plant water-retaining colloid is seaweed powder, the mineral fiber is sepiolite fiber, the nano-reinforcing powder is fumed silica, and the silicon-based tempering functional component is silicon steel.

[0011] A further preferred formulation, by weight, comprises: 32-35 parts of 42.5 grade ordinary silicate cement, 44-48 parts of mineral composite aggregate, 2.0-2.8 parts of VAE redispersible latex powder, 0.2-0.3 parts of cellulose ether, 0.2-0.4 parts of seaweed powder, 1.5-2.5 parts of sepiolite fiber, 0.5-0.9 parts of precipitated silica, 0.5-0.8 parts of silicon steel, 3-5 parts of activated zeolite powder, 1.5-2.5 parts of modified bentonite, 0.2-0.4 parts of calcium stearate, 0.4-0.6 parts of calcium formate, 0.1-0.2 parts of polycarboxylate superplasticizer, 0.15-0.35 parts of silicone powder, and 0.1-0.2 parts of powder defoamer. This formulation is suitable for indoor conventional-sized ceramic tile wall and floor installation.

[0012] Another further preferred formulation, by weight: 36-39 parts of 42.5 grade ordinary Portland cement, 37-41 parts of mineral composite aggregate, 3.8-4.5 parts of VAE redispersible latex powder, 1.2-2.0 parts of silicone-acrylic modified latex powder, 0.25-0.35 parts of cellulose ether, 0.3-0.5 parts of seaweed powder, 2.5-3.5 parts of sepiolite fiber, 1.0-1.5 parts of silica, 0 0.8-1.2 parts silicon steel powder, 5-7 parts activated zeolite powder, 2.0-3.0 parts modified bentonite, 0.3-0.5 parts calcium stearate, 0.5-0.8 parts calcium formate, 0.15-0.25 parts polycarboxylate superplasticizer, 0.15-0.35 parts silicone powder, and 0.1-0.2 parts powder defoamer. This formula is suitable for laying large-format vitrified tiles, rock slabs, underfloor heating base surfaces, exterior walls, and roofs in open-air high-weather-resistant conditions.

[0013] The mineral composite aggregate uses 0.1-2.5mm continuously graded particles, and all other functional powder raw materials are 200 mesh powders. The reasonable gradation and uniform powder fineness are conducive to the dense filling of the system and the improvement of overall workability.

[0014] Explanation of the function of each component: Silicate cement, as a cementitious matrix, provides basic bond strength and hydration curing ability; Mineral composite aggregates, used as skeleton fillers, optimize gradation and reduce drying shrinkage deformation; The redispersible latex powder is compounded with silicone-acrylic modified latex powder to improve the flexibility, bonding strength and anti-slip ability of the adhesive. Cellulose ether and seaweed powder are combined to form a composite water-retaining system, which delays the initial setting of cement, extends the construction open time, and is suitable for high temperature and high humidity construction environments. Sepiolite fibers form a three-dimensional bridging skeleton, acting as micro-steel reinforcement to increase toughness and crack resistance; Silica nanoparticles fill micropores, improving the density and strength of the adhesive. Silicon steel participates in cement hydration crosslinking, refines hydration crystals, seals capillary pores, and improves water resistance, freeze-thaw resistance, and sun exposure resistance. Activated zeolite and modified bentonite work synergistically to achieve physical adsorption for moisture prevention, alkali locking and alkali inhibition; the surface of calcium stearate is hydrophobic to block the migration channels of alkali. Calcium formate has an early and strong coagulation-promoting effect; Polycarboxylate superplasticizers optimize powder dispersibility and reduce mixing water consumption; Powder defoamers eliminate air bubbles during mixing and reduce void defects.

[0015] This invention also provides a method for preparing a high-weather-resistant, alkali-resistant, and long-shelf-life cement-based tile adhesive, comprising the following steps: Step 1: Raw material pretreatment, sieve all powder raw materials to remove impurities, agglomerates and impurity particles; Step 2: Add silicate cement, mineral composite aggregate, activated zeolite powder, and modified bentonite into a mixer for inorganic matrix premixing; Step 3: Premix cellulose ether, plant water-retaining colloid, mineral fiber, nano-reinforcing powder, silicon-based tempering functional components, calcium stearate, calcium formate, polycarboxylate superplasticizer, and powder defoamer to obtain functional small materials, and then add them together with redispersible latex powder and silicone-acrylic modified latex powder into a mixer for compounding and mixing. Step 4: Increase the stirring speed to homogenize at high speed, break up fine agglomerates of powder, and make the overall system uniform and stable; Step 5: Use double-layer inner film for moisture-proof sealing and store in a cool, dry environment.

[0016] The preparation process uses a twin-shaft gravity-free dry powder mixer; during the raw material pretreatment stage, all powder raw materials are uniformly passed through an 80-mesh standard square hole sieve to ensure that the material fineness is uniform.

[0017] In the inorganic substrate premixing stage, the stirring speed is 40-60 r / min and the stirring time is 3-5 min; in the composite mixing stage, the stirring speed is 80-110 r / min and the stirring time is 8-12 min; in the high-speed homogenization stage, the stirring speed is 130-160 r / min and the stirring time is 3-5 min; the finished product is packaged with double-layer PE inner film moisture-proof packaging, which effectively isolates external moisture, inhibits the premature hydration of powder by moisture absorption, and greatly extends the storage shelf life.

[0018] The beneficial effects of this invention are as follows: 1. This invention uses silicate cement and mineral composite aggregate as the basic skeleton material, and combines redispersible latex powder and silicone-acrylic modified latex powder composite polymer system. It is combined with cellulose ether and plant water-retaining colloid to form a dual-effect water-retaining structure, which improves the workability of tile adhesive. The dry powder is easy to stir after opening the bag, the slurry is smooth and does not clump, and it does not drip when applied to the wall. It has excellent anti-slip performance and effectively solves the problems of traditional tile adhesive such as sagging, tile displacement and insufficient adjustment time when applied to the wall. It reduces the difficulty of on-site laying and the rate of hollow defects.

[0019] 2. The introduction of sepiolite mineral fibers and nano-silica to enhance toughness and reinforcement utilizes the mineral fibers to form a three-dimensional bonding network within the adhesive, acting as micro-reinforcing steel to inhibit mortar shrinkage deformation and micro-crack formation; the nano-silica fills the micro-pores of cement hydration, optimizing internal density and significantly improving the overall structural strength and impermeability, effectively solving common problems of ordinary tile adhesives such as later-stage shrinkage cracking, surface powdering, and interface delamination, thus extending the overall service life of the tile laying system.

[0020] 3. This invention adds siliceous tempering functional components, activated zeolite, modified bentonite, and calcium stearate as a multi-stage composite alkali inhibitor. Through physical adsorption, pore alkali locking, surface hydrophobicity, and capillary pore sealing, it blocks the migration of free cement alkali with water vapor to the brick and wall surfaces, inhibiting efflorescence, whitening, and frosting of bricks. It is especially suitable for long-term use in humid environments such as South China, the return of spring, and the plum rain season, ensuring a long-lasting and beautiful decorative surface without efflorescence.

[0021] 4. The compound moisture-proof mineral components, such as modified bentonite and activated zeolite, are combined with double-layer PE inner film sealing packaging to absorb moisture in the storage environment, inhibit the cement powder from absorbing moisture and clumping and premature local hydration during long-term storage, improve the stability of powder storage, and achieve long-term storage under cool and dry conditions. After 12 months of storage, the powder remains loose, without hard lumps, and the performance does not significantly decline. This solves the industry problems of traditional tile adhesives, such as short shelf life, easy clumping, failure after long-term storage, and batch scrapping.

[0022] 5. By adjusting the dosage of polymer and functional additives, it is possible to adapt to various demanding working conditions such as conventional indoor tiling, large-format vitrified tiles, rock slabs, underfloor heating base surfaces, outdoor walls, and roof exposure on the same dry powder production line. No changes to production equipment or re-adjustment of processes are required. Co-production reduces production line investment and inventory pressure, lowers enterprise production management costs, and the cost-effectiveness of mass production is far higher than that of traditional graded individual formulation mode.

[0023] 6. Made with environmentally friendly raw materials, the overall formula is formaldehyde-free, low in VOCs, and free of irritating and harmful substances. It can be widely used in indoor and outdoor decoration projects with high environmental protection requirements, such as homes, kindergartens, hospitals, and commercial complexes. It is safe, non-toxic, and odorless during construction, meeting the requirements of green building development.

[0024] 7. The finished product has excellent comprehensive weather resistance. After water immersion, high and low temperature freeze-thaw cycles, and long-term thermal aging, the bonding strength decreases by very little. It can withstand complex working conditions such as outdoor ultraviolet exposure, long-term rain erosion, and alternating hot and cold cycles of underfloor heating. It is firmly bonded and not easy to fall off. It is suitable for use in projects with high durability requirements such as exterior walls, roofs, and open balconies, and has a wide range of application scenarios. Detailed Implementation

[0025] The technical solutions in the embodiments of this application are clearly described below. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0026] It should be noted that, unless otherwise specified in the examples, the conditions shall be in accordance with conventional conditions or the conditions recommended by the manufacturer; unless otherwise specified, the raw materials and equipment used are all commercially available conventional products.

[0027] Example 1 Conventional indoor tiling cement-based tile adhesive By weight: 32 parts of 42.5 grade ordinary silicate cement, 48 parts of mineral composite aggregate, 2.0 parts of VAE redispersible latex powder, 0.2 parts of cellulose ether, 0.2 parts of seaweed powder, 1.5 parts of sepiolite fiber, 0.5 parts of precipitated silica, 0.5 parts of silicon steel, 3 parts of activated zeolite powder, 1.5 parts of modified bentonite, 0.2 parts of calcium stearate, 0.4 parts of calcium formate, 0.1 parts of polycarboxylate superplasticizer, 0.15 parts of silicone powder, and 0.1 parts of powder defoamer.

[0028] Preparation method: Step 1: All powder raw materials are passed through an 80-mesh standard square hole sieve to remove agglomerates and impurities; Step 2: Put the mixture into a twin-shaft zero-gravity dry powder mixer and mix at a low speed of 40-60 r / min for 3-5 minutes to complete the premixing of the inorganic substrate; Step 3: Mix all the functional ingredients in advance, then add them together with VAE redispersible latex powder into a mixer and mix at a medium speed of 80-110 r / min for 8-12 min; Step 4: Increase the speed to 130-160 r / min and homogenize for 3-5 minutes to break up any small agglomerates; Step 5: Use double-layer PE inner film for moisture-proof and sealed packaging, and store in a cool and dry environment.

[0029] The product in this embodiment is suitable for indoor standard-sized ceramic tile wall and floor installation. It has good workability, excellent anti-slip properties, no efflorescence or whitening, and does not clump during long-term storage.

[0030] Example 2 High weather-resistant reinforced cement-based tile adhesive By weight: 39 parts of 42.5 grade ordinary silicate cement, 37 parts of mineral composite aggregate, 4.5 parts of VAE redispersible latex powder, 2.0 parts of silicone-acrylic modified latex powder, 0.35 parts of cellulose ether, 0.5 parts of seaweed powder, 3.5 parts of sepiolite fiber, 1.5 parts of precipitated silica, 1.2 parts of silicon steel, 7 parts of activated zeolite powder, 3.0 parts of modified bentonite, 0.5 parts of calcium stearate, 0.8 parts of calcium formate, 0.25 parts of polycarboxylate superplasticizer, 0.35 parts of silicone powder, and 0.2 parts of powder defoamer.

[0031] Preparation method: Step 1: All powder raw materials are passed through an 80-mesh standard square hole sieve to remove agglomerates and impurities; Step 2: Put the mixture into a twin-shaft zero-gravity dry powder mixer and mix at a low speed of 40-60 r / min for 3-5 minutes to complete the premixing of the inorganic substrate; Step 3: Mix all the functional ingredients in advance, then add them together with VAE redispersible latex powder into a mixer and mix at a medium speed of 80-110 r / min for 8-12 min; Step 4: Increase the speed to 130-160 r / min and homogenize for 3-5 minutes to break up any small agglomerates; Step 5: Use double-layer PE inner film for moisture-proof and sealed packaging, and store in a cool and dry environment.

[0032] The product in this embodiment has high density, weather resistance and durability, and is suitable for harsh working conditions such as large-format vitrified tiles, rock slabs, underfloor heating base surfaces, outdoor walls, and high humidity during humid spring weather.

[0033] Example 3 Intermediate general ratio cement-based tile adhesive By weight: 35 parts of 42.5 grade ordinary silicate cement, 42 parts of mineral composite aggregate, 3.2 parts of VAE redispersible latex powder, 1.0 part of silicone-acrylic modified latex powder, 0.3 parts of cellulose ether, 0.35 parts of seaweed powder, 2.5 parts of sepiolite fiber, 1.0 part of precipitated silica, 0.8 parts of silicon steel, 5 parts of activated zeolite powder, 2.2 parts of modified bentonite, 0.35 parts of calcium stearate, 0.6 parts of calcium formate, 0.18 parts of polycarboxylate superplasticizer, 0.25 parts of silicone powder, and 0.15 parts of powder defoamer.

[0034] Preparation method: Step 1: All powder raw materials are passed through an 80-mesh standard square hole sieve to remove agglomerates and impurities; Step 2: Put the mixture into a twin-shaft zero-gravity dry powder mixer and mix at a low speed of 40-60 r / min for 3-5 minutes to complete the premixing of the inorganic substrate; Step 3: Mix all the functional ingredients in advance, then add them together with VAE redispersible latex powder into a mixer and mix at a medium speed of 80-110 r / min for 8-12 min; Step 4: Increase the speed to 130-160 r / min and homogenize for 3-5 minutes to break up any small agglomerates; Step 5: Use double-layer PE inner film for moisture-proof and sealed packaging, and store in a cool and dry environment.

[0035] The product in this embodiment is suitable for both regular indoor installation and light outdoor weathering conditions, making it highly versatile and cost-effective.

[0036] Performance testing The cement-based tile adhesives prepared in each embodiment were sampled and cured according to the JC / T547-2017 standard. The initial tensile bond strength, bond strength after immersion in water, bond strength after heat aging, bond strength after freeze-thaw cycles, anti-slip performance, construction open time, and storage clumping were tested.

[0037] Test Results ; Test results show that the bonding strength of the products in each embodiment of the present invention is better than the corresponding grade of the national standard, and the anti-slip, anti-cracking and anti-alkali reversion effects are outstanding. After long-term storage in a cool and dry place, the powder is still loose without hard lumps, and the construction performance and bonding strength have not been significantly reduced. The weather resistance and storage stability are far superior to conventional commercially available tile adhesive products.

[0038] Specifically, as can be seen from the performance test data in the table above, the cement-based tile adhesives prepared in Examples 1, 2, and 3 all outperform the corresponding grade standard requirements of JC / T547-2017 in all aspects. Among them, the bonding strength of Example 1 meets the requirements for ordinary grade use, has sufficient anti-slip and open construction time, and the powder remains loose and free of lumps after 12 months of storage. After laying, there is no efflorescence or cracking, making it suitable for conventional indoor tile laying conditions. Example 2 shows that the bonding strength is significantly higher than the national standard index for reinforced grade. The strength decay is small after immersion in water, heat aging, and freeze-thaw cycles. It has excellent anti-slip performance, outstanding weather resistance, anti-alkali return and anti-cracking ability. It can be stably applied to large-format vitrified tiles, rock slabs, underfloor heating base surfaces, outdoor walls and other high and harsh working conditions. Example 3 has a comprehensive performance between Example 1 and Example 2, taking into account both conventional indoor paving and light outdoor weathering scenarios, and has strong versatility and wide applicability.

[0039] Meanwhile, none of the three sets of examples showed moisture absorption and clumping after long-term storage, demonstrating excellent product storage stability. The overall formula is well-matched, with significant synergistic effects among the functional components. It effectively solves the problems of traditional tile adhesives, such as easy efflorescence, cracking, poor weather resistance, easy clumping during storage, and insufficient adaptability to high and low temperatures and humid conditions. It has good market promotion and industrial application value.

[0040] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A cement-based tile adhesive with high weather resistance, anti-alkali reversion, and long shelf life, characterized in that, By weight, it comprises the following components: 32-39 parts silicate cement, 37-48 parts mineral composite aggregate, 2.0-4.5 parts redispersible latex powder, 0-2.0 parts silicone-acrylic modified latex powder, 0.2-0.35 parts cellulose ether, 0.2-0.5 parts plant water-retaining colloid, 1.5-3.5 parts mineral fiber, 0.5-1.5 parts nano-reinforcing powder, 0.5-1.2 parts siliceous tempering functional component, 3-7 parts activated zeolite powder, 1.5-3.0 parts modified bentonite, 0.2-0.5 parts calcium stearate, 0.4-0.8 parts calcium formate, 0.1-0.25 parts polycarboxylate superplasticizer, 0.15-0.35 parts silicone powder, and 0.1-0.2 parts powder defoamer.

2. The high weather resistance, alkali resistance, and long shelf life cement-based tile adhesive according to claim 1, characterized in that, The plant-based water-retaining colloid is seaweed powder, the mineral fiber is sepiolite fiber, the nano-reinforcing powder is silica, and the silicon-based tempering functional component is silicon steel.

3. The high weather resistance, alkali resistance, and long shelf life cement-based tile adhesive according to claim 2, characterized in that, By weight, the proportions of each component are as follows: 32-35 parts of 42.5 grade ordinary silicate cement, 44-48 parts of mineral composite aggregate, 2.0-2.8 parts of VAE redispersible latex powder, 0.2-0.3 parts of cellulose ether, 0.2-0.4 parts of seaweed powder, 1.5-2.5 parts of sepiolite fiber, 0.5-0.9 parts of silica, 0.5-0.8 parts of silicon steel, 3-5 parts of activated zeolite powder, 1.5-2.5 parts of modified bentonite, 0.2-0.4 parts of calcium stearate, 0.4-0.6 parts of calcium formate, 0.1-0.2 parts of polycarboxylate superplasticizer, 0.15-0.35 parts of silicone powder, and 0.1-0.2 parts of powder defoamer.

4. The high weather resistance, alkali resistance, and long shelf life cement-based tile adhesive according to claim 2, characterized in that, By weight, the proportions of each component are as follows: 36-39 parts of 42.5 grade ordinary silicate cement, 37-41 parts of mineral composite aggregate, 3.8-4.5 parts of VAE redispersible latex powder, 1.2-2.0 parts of silicone-acrylic modified latex powder, 0.25-0.35 parts of cellulose ether, 0.3-0.5 parts of seaweed powder, 2.5-3.5 parts of sepiolite fiber, 1.0-1.5 parts of silica, 0.8-1.2 parts of silicon steel, 5-7 parts of activated zeolite powder, 2.0-3.0 parts of modified bentonite, 0.3-0.5 parts of calcium stearate, 0.5-0.8 parts of calcium formate, 0.15-0.25 parts of polycarboxylate superplasticizer, 0.15-0.35 parts of silicone powder, and 0.1-0.2 parts of powder defoamer.

5. The high weather resistance, alkali resistance, and long shelf life cement-based tile adhesive according to claim 1, characterized in that, The mineral composite aggregate uses 0.1-2.5mm continuously graded particles, and all other functional powder raw materials use 200-mesh powder.

6. A method for preparing the high weather-resistant, alkali-resistant, long-shelf-life cement-based tile adhesive as described in any one of claims 1-5, characterized in that, Includes the following steps: Step 1: Raw material pretreatment, sieve all powder raw materials to remove impurities, agglomerates and impurity particles; Step 2: Add silicate cement, mineral composite aggregate, activated zeolite powder, and modified bentonite into a mixer for inorganic matrix premixing; Step 3: Premix cellulose ether, plant water-retaining colloid, mineral fiber, nano-reinforcing powder, silicon-based tempering functional components, calcium stearate, calcium formate, polycarboxylate superplasticizer, and powder defoamer to obtain functional small materials, and then add them together with redispersible latex powder and silicone-acrylic modified latex powder into a mixer for compounding and mixing. Step 4: Increase the stirring speed to homogenize at high speed, break up fine agglomerates of powder, and make the overall system uniform and stable; Step 5: Use double-layer inner film for moisture-proof sealing and store in a cool, dry environment.

7. The preparation method of the high weather-resistant, alkali-resistant, and long-shelf-life cement-based tile adhesive according to claim 6, characterized in that, The preparation process uses a biaxial zero-gravity dry powder mixer; During the raw material pretreatment stage, all powder raw materials are uniformly passed through an 80-mesh standard square hole sieve.

8. The preparation method of the high weather-resistant, alkali-resistant, and long-shelf-life cement-based tile adhesive according to claim 6, characterized in that, During the inorganic substrate premixing stage, the stirring speed is 40-60 r / min and the stirring time is 3-5 min. During the compound mixing stage, the mixing speed is 80-110 r / min and the mixing time is 8-12 min. During the high-speed homogenization stage, the stirring speed is 130-160 r / min and the stirring time is 3-5 min.

9. The preparation method of the high weather-resistant, alkali-resistant, and long-shelf-life cement-based tile adhesive according to claim 6, characterized in that, The finished product is packaged with a double-layer PE inner film for moisture protection.