Composition for ceramic tile glue, ceramic tile glue and preparation method of ceramic tile glue

Abstract

The invention relates to the technical field of building materials, in particular to a composition for ceramic tile glue, the ceramic tile glue and a preparation method of the ceramic tile glue. The composition for the ceramic tile glue contains a main agent and an auxiliary agent, the main agent contains Portland cement, redispersible latex powder, cellulose ether and fluorosilicone oil-starch sol. The tile adhesive provided by the invention contains the fluorosilicone oil-starch sol, can realize full-cycle dust suppression in a construction stage and a curing stage, and has a lasting effect; meanwhile, the ceramic tile adhesive has relatively strong environmental adaptability and shear resistance, can keep stable performance in a humid environment, and still has relatively high elastic network retention rate and relatively low dynamic construction dust dissipation rate under high shear.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of building materials, in particular to a composition for ceramic tile adhesive, ceramic tile adhesive and a preparation method thereof. BACKGROUND

[0002] Ceramic tile adhesive is a modern decoration material with high bonding force, high waterproof and anti-permeability, and anti-cracking and anti-aging performance, which is widely used in indoor and outdoor ceramic wall and floor tile sticking, and waterproof layer of interior and exterior walls of various buildings.

[0003] The dust generated in the production and use of traditional ceramic tile adhesive may cause environmental pollution and harm the health of relevant personnel. Therefore, it is urgent to find effective measures to solve the dust problem of ceramic tile adhesive.

[0004] CN118580022A discloses a dust-free ceramic tile adhesive composition and its application and a dust-free ceramic tile adhesive. The dust-free ceramic tile adhesive composition comprises a solid dust suppressant, a phospholipid, a dispersing agent, nano-silicon dioxide and nano-modified bentonite, which can suppress dust of ceramic tile adhesive, reduce the mixing difficulty of dust-free ceramic tile adhesive, and balance the cohesive strength of dust-free ceramic tile adhesive. However, the phospholipid is easily hydrolyzed in an alkaline cement environment, and the dust suppression network is easily damaged under shear force in dynamic construction.

[0005] CN118851658A discloses a dust-free ceramic tile adhesive composition, a preparation method and a ceramic tile adhesive. The method mixes a dust removal agent with sand, and then mixes the obtained mixture with a powder composition containing cement to obtain a dust-free ceramic tile adhesive composition. The dust-free ceramic tile adhesive composition has a significantly reduced dust emission effect, and the ceramic tile adhesive has good tensile bonding strength. However, the method relies on physical wrapping, and the dust suppression has a short time effectiveness (≤7 days), and the effect decreases by 50% in a humid environment.

[0006] Dust-free ceramic tile adhesive is a new type of ceramic tile bonding material with low dust emission. By optimizing the particle size distribution and formula design, the dust emission during construction is reduced, which meets the requirements of green building for indoor air quality. However, ordinary dust-free ceramic tile adhesive has the problems of poor dust suppression effect, poor adaptability to humid environment, and unstable bonding strength. Therefore, it is urgent to develop a dust-free ceramic tile adhesive with good dust suppression effect, strong environmental adaptability and high bonding strength. SUMMARY

[0007] The purpose of the present application is to overcome the problems of poor dust suppression effect, poor adaptability to humid environment, and insufficient dynamic stability of the dust suppression network of the existing ceramic tile adhesive dust suppressant.

[0008] To achieve the above-mentioned purpose, the first aspect of the present application provides a composition for ceramic tile adhesive, which contains a main agent and an auxiliary agent; the main agent contains Portland cement, redispersible latex powder, cellulose ether and fluorosilicone oil-starch sol; The content of the silicate cement is 35-50 wt%, the content of the redispersible latex powder is 1-3 wt%, the content of the cellulose ether is 0.2-0.4 wt%, and the content of the fluorosilicone oil-starch sol is 8-12 wt% based on the total weight of the composition; The fluorosilicone oil-starch sol contains fluorosilicone oil, maleic anhydride modified starch, and nano titanium dioxide. The content of the fluorosilicone oil is 10-20 wt%, the content of the maleic anhydride modified starch is 30-80 wt%, and the content of the nano titanium dioxide is 20-60 wt% based on the total weight of the fluorosilicone oil-starch sol.

[0009] The second aspect of the present application provides a method for preparing a ceramic tile glue, which applies each component in the composition of the first aspect of the present application, comprising: (1) first mixing silicate cement, aggregate, filler, cellulose ether, and redispersible latex powder to obtain intermediate I; (2) second mixing the intermediate I with a fluorosilicone oil-starch sol to obtain a coated powder; (3) third mixing the coated powder with water to obtain the ceramic tile glue.

[0010] The third aspect of the present application provides a ceramic tile glue prepared by the method of the second aspect.

[0011] Through the above technical solution, the present application has at least the following advantages: (1) The ceramic tile glue provided by the present application contains a fluorosilicone oil-starch sol as a dust suppressant, which can achieve dust suppression throughout the construction phase and maintenance period, and the effect is long-lasting.

[0012] (2) The ceramic tile glue provided by the present application has strong environmental adaptability and shear resistance. It can maintain stable performance in a humid environment and still has a high elastic network retention rate and a low dynamic construction dust dispersion rate under high shear.

[0013] (3) The ceramic tile glue provided by the present application can balance the dust suppression effect and the physical properties such as the bonding strength and water retention of the ceramic tile glue. DETAILED DESCRIPTION

[0014] The endpoints of the ranges and any values disclosed herein are not to be construed as limiting. Ranges disclosed herein are inclusive of the endpoints and the individual points within the ranges. Any numerical range recited is intended to include all sub-ranges of the same numbers (i.e., every subrange between two consecutive numbers). For example, a range of 1 to 10 is intended to include every possible subrange between and including 1 and 10, e.g., 1-9.1, 1-9.2, 1-9.3, 1-9.4, 1-9.5, 1-9.6, 1-9.7, 1-9.8, 1-9.9, 1-10, 2-10, 3-10, 4-10, 5-10, 6-10, 7-10, 8-10, 9-10, 1-9, 2-9, 3-9, 4-9, 5-9, 6-9, 7-9, 8-9, 1-8, 2-8, 3-8, 4-8, 5-8, 6-8, 7-8, 1-7, 2-7, 3-7, 4-7, 5-7, 6-7, 1-6, 2-6, 3-6, 4-6, 5-6, 1-5, 2-5, 3-5, 4-5, 1-4, 2-4, 3-4, 1-3, 2-3, 1-2, and 1-1.

[0015] As described above, the first aspect of the present application provides a composition for ceramic tile adhesive, which contains a main agent and an auxiliary agent; the main agent contains Portland cement, redispersible polymer powder, cellulose ether and fluorosilicone oil-starch sol; The content of the Portland cement is 35-50 wt%, the content of the redispersible polymer powder is 1-3 wt%, the content of the cellulose ether is 0.2-0.4 wt%, and the content of the fluorosilicone oil-starch sol is 8-12 wt%, based on the total weight of the composition; The fluorosilicone oil-starch sol contains fluorosilicone oil, maleic anhydride modified starch and nano titanium dioxide; The content of the fluorosilicone oil is 10-20 wt%, the content of the maleic anhydride modified starch is 30-80 wt%, and the content of the nano titanium dioxide is 20-60 wt%, based on the total weight of the fluorosilicone oil-starch sol.

[0016] Preferably, the fluorosilicone oil-starch sol is prepared by a method comprising the following steps: (1) contacting fluorosilicone oil with maleic anhydride modified starch in the presence of a solvent to perform esterification reaction, to obtain a crosslinked prepolymer; the fluorosilicone oil has a kinematic viscosity of 500-10000 cSt at 25℃ and a surface tension of ≤30 mN / m at 25℃; (2) mixing the crosslinked prepolymer with nano titanium dioxide to obtain the fluorosilicone oil-starch sol.

[0017] Preferably, the fluorosilicone oil is selected from at least one of trifluoropropyl methyl silicone oil and alkyl polyether modified fluorosilicone oil.

[0018] Preferably, the maleic anhydride modified starch is selected from at least one of maleic anhydride corn starch and maleic anhydride potato starch.

[0019] Preferably, in step (1), the solvent is a mixture of ethanol and water.

[0020] Further preferably, in step (1), the volume ratio of ethanol to water in the mixture is 1:1-5.

[0021] Preferably, in step (1), the weight ratio of the use amount of the fluorosilicone oil to the maleic anhydride modified starch is 1:1.5-5. The inventors have found that, in this preferred case, the fluorosilicone oil-starch sol provided by the present application has stronger alkali resistance and shear resistance.

[0022] Further preferably, the use amount of the solvent is 1250-2500 mL per 100 g of the fluorosilicone oil.

[0023] Preferably, in step (1), the esterification reaction is carried out at a temperature of 50-70°C for 1-3 hours.

[0024] Preferably, in step (2), the weight ratio of the crosslinked prepolymer to the nano-titanium dioxide is 1:0.2-0.6.

[0025] Further preferably, the nano-titanium dioxide has a weight average diameter of 50-100 nm. The inventors have found that, in this preferred case, the fluorosilicone oil-starch sol provided by the present application has a more significant effect on photocatalytic decomposition of organic dust and has stronger shear resistance.

[0026] More preferably, the nano-titanium dioxide is selected from at least one of rutile nano-titanium dioxide and anatase nano-titanium dioxide.

[0027] Preferably, the mixing reaction is carried out at a temperature of 50-60°C for 5-60 minutes.

[0028] Preferably, the mixing is carried out by ultrasonic dispersion. The present application does not have a specific requirement for the specific operation of the ultrasonic dispersion, and those skilled in the art can use the known method in the art.

[0029] Preferably, the additive contains aggregate and filler.

[0030] Further preferably, the content of the aggregate is 35-45 wt% and the content of the filler is 5-10 wt% based on the total weight of the composition.

[0031] Preferably, the Portland cement is selected from at least one of P·O42.5 grade, P·O42.5R grade, P·O52.5 grade and P·O52.5R grade.

[0032] Preferably, the redispersible latex powder is a water-soluble redispersible powder; and the water-soluble redispersible powder is selected from at least one of ethylene / vinyl acetate copolymer-based redispersible powder, vinyl acetate / ethylene carbonate copolymer-based redispersible powder, acrylic acid copolymer-based redispersible powder, acrylate / styrene copolymer-based redispersible powder and styrene / butadiene copolymer-based redispersible powder.

[0033] Preferably, the cellulose ether is selected from at least one of hydroxyethyl methyl cellulose ether and hydroxypropyl methyl cellulose ether.

[0034] Preferably, the hydroxypropyl methyl cellulose ether is selected from at least one of low-viscosity hydroxypropyl methyl cellulose ether, medium-viscosity hydroxypropyl methyl cellulose ether and high-viscosity hydroxypropyl methyl cellulose ether.

[0035] Further preferably, the low viscosity hydroxypropyl methyl cellulose ether has a kinematic viscosity of 50-500 mPa s at 25°C; the medium viscosity hydroxypropyl methyl cellulose ether has a kinematic viscosity of 1000-5000 mPa s at 25°C; and the high viscosity hydroxypropyl methyl cellulose ether has a kinematic viscosity of 10,000-100,000 mPa s at 25°C.

[0036] Preferably, the average particle size of the aggregate is 0.1-0.3 mm.

[0037] Further preferably, the aggregate is selected from at least one of quartz sand, river sand, limestone sand.

[0038] Preferably, the average particle size of the filler is 60-100 μm.

[0039] Further preferably, the filler is selected from at least one of calcium powder, stone powder.

[0040] As mentioned before, the second aspect of the present application provides a method for preparing the ceramic tile glue, which is performed by using the components in the composition of the first aspect, comprising: (1) first mixing the Portland cement, the aggregate, the filler, the cellulose ether and the redispersible latex powder to obtain an intermediate I; (2) second mixing the intermediate I with the fluorosilicone oil-starch sol to obtain a coated powder; (3) third mixing the coated powder with water to obtain the ceramic tile glue.

[0041] Preferably, in step (1), the first mixing is performed for 1-20 min.

[0042] Preferably, in step (2), the second mixing is performed by introducing the fluorosilicone oil-starch sol in the form of spray to contact with the intermediate I.

[0043] Further preferably, in step (2), the fluorosilicone oil-starch sol is introduced at a flow rate of 1-2 g / min per 1 kg of the intermediate I.

[0044] Preferably, in step (3), the third mixing is performed under the mixing condition of stirring speed of 300-500 rpm and time of 3-5 min.

[0045] More preferably, in step (3), the weight ratio of the coated powder to the water is 1:0.25-0.30. The inventors have found that, in this preferred case, the ceramic tile glue provided by the present application has a higher shear viscosity.

[0046] As described above, the third aspect of the present application provides a ceramic tile adhesive prepared by the method of the second aspect.

[0047] Preferably, the ceramic tile adhesive has a bonding strength ≥ 0.6 MPa, a 28d dust suppression efficiency by friction ≥ 70 wt%, a dust dispersion rate by shearing ≤ 15 wt%, and a high-humidity dust suppression tolerance coefficient ≥ 90 wt% in an environment with a relative humidity of 90% RT.

[0048] The present application will be described in detail below by way of examples. In the following examples, the reagents and raw materials involved are commercially available, and the reagents are all analytical grade products.

[0049] Fluorosilicone oil: Trifluoropropyl methyl silicone oil with a kinematic viscosity of 5000 cSt at 25°C and a surface tension of 25 mN / m at 25°C, purchased from Wuhan Hongdexin Pharmaceutical Technology Co., Ltd. Alkyl polyether modified fluorosilicone oil with a kinematic viscosity of 600 cSt at 25°C and a surface tension of 20 mN / m at 25°C, purchased from Shenzhen Jipeng Silicon Fluorine Material Co., Ltd. Maleic anhydride modified starch: Maleic anhydride corn starch, purchased from Foshan Gao Feng Starch Technology Co., Ltd. Maleic anhydride potato starch, purchased from Guangxi Mingyang Biochemical Technology Co., Ltd. Nano titanium dioxide: Rutile type nano titanium dioxide with an average diameter of 60 nm, purchased from Xuancheng Jingrui New Material Co., Ltd. Anatase titanium dioxide with an average diameter of 60 nm, purchased from Longpeng Boli Group Co., Ltd. Cellulose ether: hydroxypropyl methyl cellulose ether, grade HD110, which belongs to high viscosity hydroxypropyl methyl cellulose ether, with a kinematic viscosity of 20000 Pa·s at 25°C, purchased from Shandong Heda Co., Ltd. Silicate cement: strength grade P·O42.5 level, purchased from Yangchun Conch Cement Co., Ltd. Aggregate: quartz sand with an average particle size of 0.2 mm, purchased from Guangdong Aoseng New Material Co., Ltd. Filling material: calcium powder with an average particle size of 75 μm, purchased from Zhongshan Xiongding Environmental Protection Building Material Co., Ltd. Redispersible latex powder: average particle size of 150 μm, grade 5010N, purchased from Wacker Chemical (China) Co., Ltd.

[0050] Unless otherwise specified, the total mass of the fluorosilicone oil-starch sol prepared in the following examples is 10 g, and the total mass of the ceramic tile adhesive prepared is 1000 g.

[0051] Example 1 The fluorosilicone oil-starch sol was prepared by the following steps: (1) A mixture of 2500 mL of ethanol and water in a volume ratio of 1:2 was used as a solvent, and a fluorosilicone oil and a maleic anhydride modified starch in a weight ratio of 1:3 (wherein the mass of the fluorosilicone oil was 150 g) was added to the solvent to contact and undergo esterification reaction to obtain a crosslinked prepolymer; the esterification reaction conditions included a temperature of 60°C and a time of 2 h.

[0052] (2) The crosslinked prepolymer and nano-titanium dioxide in a weight ratio of 1:0.4 were mixed by ultrasonic dispersion to obtain the fluorosilicone oil-starch sol; the mixing conditions included a temperature of 60°C and a time of 15 min.

[0053] The ceramic tile glue was prepared by the following steps: (1) A silicate cement, aggregate, filler, cellulose ether, and redispersible latex powder were first mixed (wherein the mass of the silicate cement was 400 g), and the mixing time was 5 min to obtain an intermediate I; (2) Relative to 1 kg of the intermediate I, the fluorosilicone oil-starch sol was introduced in a spray form at a flow rate of 1.5 g / min to second mix with the intermediate I to obtain a coated powder; (3) The coated powder and water were third mixed to obtain the ceramic tile glue, and the mixing conditions of the third mixing included a weight ratio of the coated powder to the water of 1:0.28, a stirring speed of 500 rpm, and a time of 5 min.

[0054] The remaining specific process parameters of this example are shown in Table 1. In Table 1, the content of the fluorosilicone oil refers to the proportion of the mass of the fluorosilicone oil to the total mass of the fluorosilicone oil-starch sol; the content of the maleic anhydride modified starch refers to the proportion of the mass of the maleic anhydride modified starch to the total mass of the fluorosilicone oil-starch sol; the content of the nano-titanium dioxide refers to the proportion of the mass of the nano-titanium dioxide to the total mass of the fluorosilicone oil-starch sol; the content of the silicate cement refers to the proportion of the mass of the silicate cement to the total mass of the composition for ceramic tile glue; the content of the aggregate refers to the proportion of the mass of the aggregate to the total mass of the composition for ceramic tile glue; the content of the filler refers to the proportion of the mass of the filler to the total mass of the composition for ceramic tile glue; the content of the redispersible latex powder refers to the proportion of the mass of the redispersible latex powder to the total mass of the composition for ceramic tile glue; the content of the fluorosilicone oil-starch sol refers to the proportion of the mass of the fluorosilicone oil-starch sol to the total mass of the composition for ceramic tile glue; and the content of the cellulose ether refers to the proportion of the mass of the cellulose ether to the total mass of the composition for ceramic tile glue.

[0055] Examples 2-13 Examples 2-13 all used the same process as Example 1, with the differences listed in Table 1.

[0056] Comparative Examples 1-9 Comparative Examples 1-9 all used the same process as Example 1, with the differences listed in Table 1.

[0057] Table 1

[0058] Table 1 (continued)

[0059] Test case The physical performance test data of the examples and comparative examples are shown in Table 2.

[0060] The test methods for tensile bond strength, tensile bond strength after immersion in water, and tensile bond strength after heat aging shall refer to the section on "Determination of Tensile Bond Strength" in JC / T547-2017 "Ceramic Tile Adhesives".

[0061] The test method for shear dust emission rate is as follows: Referencing ASTM D2983, "Determination of Plastic Viscosity and Yield Value," coupled with dust emission testing; the experimental setup includes a rheometer (equipped with parallel plate clamps, 25mm in diameter, 1mm gap) and a dust emission monitoring system (laser particle size analyzer + PM2.5 sensor); the test steps include: preparing tile adhesive mortar, and in the rheometer, at a speed of 10-1000 s⁻¹... -1 The shear rate gradient was scanned, and the viscosity-shear rate curve was recorded. During the shearing process, the dust emission rate on the slurry surface was monitored simultaneously (PM2.5 concentration was collected every 10 seconds). The shear dust emission rate can be calculated using formula (1). [PM2.5] max [PM2.5]0 refers to the peak value of PM2.5 concentration during the shearing process; [PM2.5]0 refers to the initial value of PM2.5 concentration.

[0062]

[0063] The test method of high-humidity dust suppression tolerance coefficient is a modification of the environmental control module of ISO11925-2 "Building materials-combustibility test". The experimental device includes a constant temperature and humidity chamber (humidity control range 30%-90%) and a dust dispersion test chamber (with real-time humidity adjustment function). The test steps include: placing the dust-free ceramic tile adhesive powder and the control sample without dust suppressant in a humidity of 50% and 90% environment for 24 hours; after taking out (adding water according to the water-powder ratio of 1:0.28), stirring in the dust dispersion test chamber at 200 rpm for 3 minutes, and recording the PM2.5 concentration under different humidity. The dust suppression efficiency is calculated by formula (2), and the high-humidity dust suppression tolerance coefficient can be calculated by formula (3). In formula (2), [PM2.5] CK is the PM2.5 concentration of the control sample; [PM2.5]1 is the PM2.5 concentration of the dust-free ceramic tile adhesive powder. In formula (3), dust suppression efficiency (90%RT) refers to the dust suppression efficiency at a humidity of 90%RT; dust suppression efficiency (50%RT) refers to the dust suppression efficiency at a humidity of 50%RT.

[0064]

[0065] The test method of 28d friction dust suppression efficiency is a modification of GB / T16157 "Determination of particulate matter and sampling method of gaseous pollutants in exhaust gas from stationary sources". The experimental device includes a sealed stirring chamber (1m³, with dust concentration sensor) and a constant temperature and humidity curing box (control temperature 23±2℃, humidity 50±5%); the test steps include: weighing 500g of the ceramic tile adhesive of the present scheme and the control sample without dust suppressant, adding water according to the water-powder ratio of 1:0.28, stirring in the stirring chamber at 300r / min for 5 minutes, and recording the initial PM2.5 concentration in real time; the stirred slurry is made into a 100mm×100mm test block, and after curing for 28 days, the surface of the test block is scraped with a scraper to simulate construction dust in the stirring chamber, and the PM2.5 concentration during scraping is recorded. The 28d friction dust suppression efficiency can be calculated by formula (4). In formula (4), [PM2.5] CK is the PM2.5 concentration of the control sample during scraping; [PM2.5]1 is the PM2.5 concentration of the ceramic tile adhesive of the present scheme during scraping.

[0066]

[0067] Table 2

[0068] As can be seen from the results in the above table, the ceramic tile adhesive provided by the present application has the significant advantages of long-lasting dust suppression effect, strong adaptability in humid environment, and high bonding strength, with a high actual application value and a high dust suppression efficiency.

[0069] The preferred embodiments of the present application are described in detail above, but the present application is not limited thereto. Within the technical concept of the present application, various simple modifications can be made to the technical solutions of the present application, including that each technical feature is combined in any other suitable manner. These simple modifications and combinations should also be considered as disclosed by the present application and fall within the protection scope of the present application.

Claims

1. A composition for tile adhesive, characterized by, The composition contains a main agent and an auxiliary agent; the main agent contains Portland cement, redispersible latex powder, cellulose ether and fluorosilicone oil-starch sol; The content of the Portland cement is 35-50wt% based on the total weight of the composition, the content of the redispersible latex powder is 1-3wt%, the content of the cellulose ether is 0.2-0.4wt%, and the content of the fluorosilicone oil-starch sol is 8-12wt%; The fluorosilicone oil-starch sol contains fluorosilicone oil, maleic anhydride modified starch and nano titanium dioxide; The content of the fluorosilicone oil is 10-20wt% based on the total weight of the fluorosilicone oil-starch sol, the content of the maleic anhydride modified starch is 30-80wt%, and the content of the nano titanium dioxide is 20-60wt%.

2. The composition of claim 1, wherein The fluorosilicone oil-starch sol is prepared by a method comprising the following steps: (1) contacting fluorosilicone oil with maleic anhydride modified starch in the presence of a solvent to perform esterification reaction, to obtain a crosslinked prepolymer; the fluorosilicone oil has a kinematic viscosity of 500-10000 cSt at 25℃ and a surface tension ≤30 mN / m at 25℃; (2) mixing the crosslinked prepolymer with nano titanium dioxide to perform a mixing reaction, to obtain the fluorosilicone oil-starch sol.

3. The composition of claim 2, wherein, In step (1), the solvent is a mixture of ethanol and water; And / or, in step (1), the volume ratio of ethanol to water in the mixture is 1:1-5.

4. The composition of claim 2, wherein, In step (1), the weight ratio of the use amount of the fluorosilicone oil to the maleic anhydride modified starch is 1:1.5-5; And / or, in step (1), the esterification reaction is performed under the following conditions: temperature 50-70℃, time 1-3h.

5. The composition according to any one of claims 2-4, wherein, In step (2), the weight ratio of the use amount of the crosslinked prepolymer to the nano titanium dioxide is 1:0.2-0.6; And / or, the weight average diameter of the nano titanium dioxide is 50-100nm.

6. The composition according to any one of claims 2-4, wherein, In step (2), the mixing reaction is performed under the following conditions: temperature 50-60℃, time 5-60min.

7. The composition according to any one of claims 1 to 4, wherein The auxiliary agent contains aggregate and filling material; And / or, the content of the aggregate is 35-45wt% based on the total weight of the composition, and the content of the filling material is 5-10wt%; And / or, the cellulose ether is at least one selected from hydroxyethyl methyl cellulose ether and hydroxypropyl methyl cellulose ether; And / or, the hydroxypropyl methyl cellulose ether is at least one selected from low viscosity hydroxypropyl methyl cellulose ether, medium viscosity hydroxypropyl methyl cellulose ether and high viscosity hydroxypropyl methyl cellulose ether.

8. A method of preparing a tile adhesive, characterized by, The method applies the components in the composition of any one of claims 1-7, comprising: (1) first mixing Portland cement, aggregate, filling material, cellulose ether and redispersible latex powder to obtain intermediate I; (2) second mixing the intermediate I with fluorosilicone oil-starch sol to obtain a coated powder; (3) third mixing the coated powder with water to obtain the ceramic tile glue.

9. The method of claim 8, wherein, In step (1), the first mixing is performed for 1-20min; and / or, in step (2), the operation of performing the second mixing includes: introducing the fluorosilicone oil-starch sol in a spray form to contact with the intermediate I; and / or, in step (2), the introduction flow of the fluorosilicone oil-starch sol is 1-2 g / min with respect to 1 kg of the intermediate I.

10. The tile glue prepared by the method of claim 8 or 9.

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