Tile back surface bead effect remover and method of making same

Abstract

The application provides a tile back bead effect remover and a preparation method thereof, and belongs to the technical field of building materials. The remover comprises the following components in percentage by mass: 0.5-5% of a silane coupling agent, 2-10% of an acrylate-vinyl versatate copolymer latex powder, 1-8% of silicon dioxide nanoparticles, 8-20% of an alkaline component, 3-10% of a bio-based surfactant, 1-5% of a lipase, 8-20% of an adsorbent, and 40-70% of a filler. The remover can effectively remove the bead effect on the back of the tile, improve the bonding performance of the tile, improve the durability, especially the bonding performance after the tile is soaked and after heat aging, reduce the hollowing phenomenon, and improve the service life of the tile. The remover has low cost, and the raw materials are easy to obtain, low-toxic, environmentally friendly, simple and fast to use, and can improve the construction efficiency and quality, be easy to operate, save cost, and enhance the safety and environmental protection.

Description

Technical Field

[0001] This invention belongs to the field of building materials technology, and in particular relates to a bead-removing agent for the back of ceramic tiles and its preparation method. Background Technology

[0002] The lotus effect on the back of a tile refers to the phenomenon where water droplets falling on the back of a tile do not spread out but form small droplets that roll on the surface and are not easily absorbed. This phenomenon is mainly due to the hydrophobic or superhydrophobic properties of the tile's back. The main reasons for this phenomenon are: 1. Release agents: During the tile manufacturing process, a release agent is often applied to the inside of the mold or the back of the tile to facilitate removal from the mold. This release agent may contain waxy components or other hydrophobic materials, giving the tile's back strong hydrophobicity. 2. Surface roughness: If the back of the tile is specially treated to become very smooth, or if its microstructure forms a micro-nano structure similar to the "lotus effect" (i.e., regularly arranged small protrusions on the surface), it will also promote the formation of spherical water droplets that roll and are not easily absorbed by the tile. 3. Chemical residues: In addition to specially used release agents, other types of chemical residues may remain during the production process, such as anti-fouling agents and polishing agents. These substances can also impart certain hydrophobic properties to the back of the tile.

[0003] The load bead effect on the back of tiles reduces the adhesion between the tile and the floor, making the tile prone to hollowing and cracking, severely affecting the installation effect and lifespan, and also increasing maintenance costs. Therefore, it is crucial to address the load bead effect problem on the back of tiles promptly.

[0004] Patent CN202410290030.4 discloses a treatment agent to overcome the problem of bead formation caused by hydrophobic / superhydrophobic surfaces of building ceramics. The agent comprises: 0.2-1.5% of a bonding agent, 0.5-4% of a film-forming agent, 0.1-0.6% of carboxymethyl cellulose, 0.1-0.8% of a plasticizer, 0.5-6% of silica sol, and 85-98% of water. The interface layer prepared by this treatment agent effectively prevents oily / organic waxes from directly depositing on the bottom of the brick, thus solving the hydrophobic / superhydrophobic problem. However, the use of iron-based metal-organic framework (MOF) as a bonding agent increases the cost of the treatment agent, and its synthesis process is complex, directly affecting the industrial production of the final product. This treatment agent requires specific spraying equipment and conditions (such as nozzle orifice diameter and spraying pressure), increasing the complexity of construction and the requirements for operators. The curing process needs to be carried out at 80-100℃, which means that heating equipment or compressed air drying is required at the construction site, increasing construction time and cost.

[0005] Therefore, there is an urgent need for a low-cost, easy-to-use cleaner that can effectively remove the beading effect on the back of tiles. Summary of the Invention

[0006] The purpose of this invention is to provide a bead-removing agent for the back of ceramic tiles and its preparation method. The removal agent has low preparation cost, simple application method, and can effectively remove the bead-removing effect on the back of ceramic tiles, improve the adhesion between ceramic tiles and the ground, solve the problems of ceramic tiles being prone to hollowing and cracking, improve the paving effect of ceramic tiles, and extend the service life of ceramic tiles.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] The first aspect of the present invention provides a bead-removing agent for the back of ceramic tiles, comprising the following components by weight percentage: 0.5-5% silane coupling agent, 2-10% acrylate-ethylene carbonate copolymer latex powder, 1-8% silica nanoparticles, 8-20% alkaline component, 3-10% bio-based surfactant, 1-5% lipase, 8-20% adsorbent, and 40-70% filler.

[0009] In a preferred embodiment, the bead-removing agent on the back of the tile comprises the following components by weight percentage: 0.5-2% silane coupling agent, 3-5% acrylate-ethylene carbonate copolymer latex powder, 2-4% silica nanoparticles, 10-15% alkaline component, 5-8% bio-based surfactant, 1-2% lipase, 10-15% adsorbent, and 60-70% filler.

[0010] In a preferred embodiment, the silane coupling agent is selected from one or more of γ-aminopropyltriethoxysilane, γ-methacryloxypropyltrimethoxysilane, and N-β-(aminoethyl)-γ-aminopropyltrimethoxysilane.

[0011] In a preferred embodiment, the butyl acrylate-vinyl acetate copolymer latex powder is prepared as follows:

[0012] (1) Add deionized water to the reaction vessel, heat to 60-80°C, add sodium dodecyl sulfate and polyvinyl alcohol, stir evenly, and add sodium bicarbonate to adjust the pH value to 7-8.

[0013] (2) Mix butyl acrylate and vinyl acetate to form a monomer mixture, and add a portion of the monomer mixture into the reaction vessel for pre-emulsification;

[0014] (3) Adjust the temperature of the reactor to 70-80℃, add the remaining monomer mixture and potassium persulfate aqueous solution dropwise into the reactor for 1-2 hours. After the addition is complete, continue to keep the temperature for 1-2 hours. After the reaction is complete, stop heating and cool to room temperature to obtain the desired solution.

[0015] (4) The above liquid material is dried by spray drying equipment to obtain the butyl acrylate-vinyl acetate copolymer latex powder.

[0016] In a preferred embodiment, the mass ratio of butyl acrylate to vinyl acetate is 1.5 to 3:1.

[0017] In a preferred embodiment, the sodium dodecyl sulfate is 1-5% of the total monomer content, the polyvinyl alcohol is 0.5-3% of the total monomer content, and the potassium persulfate is 0.1-0.5% of the total monomer content.

[0018] In a preferred embodiment, the mass of the partial monomer mixture in step (2) is 10-30% of the total mass of the monomer mixture.

[0019] In the cleaning agent provided by this invention, the silane coupling agent forms a layer of hydrophilic silanol groups on the tile surface through a hydrolysis reaction, increasing surface wettability, reducing surface tension, making water spread more easily, reducing beading effect, and reacting with active groups (such as hydroxyl groups) in the tile adhesive to form stable chemical bonds, thus improving bonding strength. The butyl acrylate-vinyl acetate copolymer latex powder forms a continuous polymer film on the tile surface, providing good adhesion and water resistance. The formed polymer film also has a certain degree of flexibility and strength, which can improve the mechanical bonding force between the tile and the adhesive, thereby improving the overall tensile bond strength. Nanoscale silica particles increase the surface roughness of the tile, improving surface wettability and adhesion. Silica nanoparticles possess a very large specific surface area, allowing them to disperse uniformly within the latex powder. Together with the polymer latex powder, they form a unique three-dimensional network structure and effectively penetrate the back of the tile and the wall substrate. This results in a cavity-free bonding system between the tile adhesive, the substrate, and the tile. Furthermore, the stability of the silica nanoparticles ensures sufficient bonding strength for the tile under water immersion and heat aging conditions. Simultaneously, the lower molecular weight silane coupling agent easily penetrates into the micropores of the tile back and the wall substrate, working in conjunction with the silica nanoparticles and latex powder to form a tighter contact, resulting in a smoother surface, reduced water penetration, and a cavity-free bonding system. The combined effect of the silane coupling agent, silica nanoparticles, and acrylate-ethylene carbonate copolymer latex powder significantly improves the tile's bonding performance, particularly its bonding strength under water immersion and heat aging conditions, thereby effectively reducing the rate of tile hollowing.

[0020] In a preferred embodiment, the alkaline component is selected from one or more of sodium hydroxide, sodium carbonate, sodium bicarbonate, sodium silicate, trisodium phosphate, and potassium hydroxide.

[0021] In a preferred embodiment, the bio-based surfactant is a mixture of lignin sulfonate and fatty acid methyl ester sulfonate in a mass ratio of 1:1 to 3.

[0022] Bio-based surfactants reduce surface tension, making it easier for water to spread on the tile surface. Simultaneously, lipases break down surface oil contaminants, further improving surface wettability. These two actions work together to enhance the wettability of the tile surface and reduce the beading effect. The bio-based surfactants, using a specific ratio of lignin sulfonate and fatty acid methyl ester sulfonate, facilitate the uniform dispersion of other components (such as silica nanoparticles and acrylate-ethylene carbonate copolymer latex powder) in water. Lipases, by breaking down oils, reduce uneven deposition of these components on the surface. This dual action ensures uniform distribution of all components on the tile surface, improving overall performance. Furthermore, the use of a mixture of lignin sulfonate and fatty acid methyl ester sulfonate further improves the product's stability under different pH and temperature conditions, helping to maintain long-term product stability and reducing clumping.

[0023] In a preferred embodiment, the adsorbent is obtained by mixing and modifying diatomaceous earth and montmorillonite, and then mixing them with carboxymethyl cellulose.

[0024] In a preferred embodiment, the modification method is as follows:

[0025] (1) Weigh out diatomaceous earth, montmorillonite and carboxymethyl cellulose in proportion, and mix diatomaceous earth with montmorillonite;

[0026] (2) Keep the mixture at 500-600℃ for 2-5 hours, and then cool it to room temperature after the treatment is completed;

[0027] (3) Add the heat-treated mixture to 1M HCl with a solid-liquid ratio of 1:8 to 15 g / mL and stir for 1 to 2 hours;

[0028] (4) Filter and wash with deionized water until the pH is neutral, dry and then mix with carboxymethyl cellulose to obtain the adsorbent.

[0029] In a preferred embodiment, the mass ratio of diatomaceous earth, montmorillonite, and carboxymethyl cellulose is 4-5:3-4:1.

[0030] Modified diatomaceous earth and montmorillonite, when mixed with carboxymethyl cellulose, can further enhance the adsorption capacity, improve dispersibility and stability, and increase mechanical cleaning ability of the material when used as an adsorbent. Heat treatment of the diatomaceous earth and montmorillonite mixture can alter the surface properties and pore structure of the material, thereby enhancing its adsorption capacity and thermal stability. Acid treatment can change the surface charge characteristics, increase porosity, and improve the selective adsorption of specific contaminants such as grease on the back of ceramic tiles.

[0031] In a preferred embodiment, the filler is selected from one or more of kaolin, calcium carbonate, and talc.

[0032] The alkaline components in the cleaner formulation neutralize any acidic substances that may be present on the tile surface, while also acting as a mild abrasive to help remove dirt and grease. Fillers reduce costs and help regulate the overall properties of the mixture, providing a degree of mechanical strength and stability.

[0033] A second aspect of the present invention provides a method for preparing the above-mentioned tile backing bead remover, comprising the following steps:

[0034] (1) Weigh each raw material component according to the weight proportions;

[0035] (2) Mix the silane coupling agent with 20-40% by mass of the adsorbent so that the silane coupling agent is completely absorbed by the adsorbent.

[0036] (3) Add the remaining adsorbent, filler, alkaline components, and acrylate-ethylene carbonate copolymer latex powder to the stirrer and stir for 5-10 minutes.

[0037] (4) Add silica nanoparticles and bio-based surfactants to the stirrer in step (3) and continue stirring for 10-20 minutes;

[0038] (5) Add the lipase and the silane coupling agent / adsorbent mixture treated in step (2) to the stirrer in step (4) and continue stirring for 10 to 20 minutes to obtain the scavenger.

[0039] The method of using the tile backing bead remover of this invention is as follows: Disperse the remover in water, then spray it directly onto the back of the tile. After 10-20 minutes, wipe it with a towel before applying adhesive and laying the tile. 100g of remover mixed with approximately 20kg of water can clean 140 square meters of tiles.

[0040] Compared with the prior art, the advantages and beneficial effects of the present invention are as follows:

[0041] 1. The beading effect remover of the present invention can effectively remove the beading effect on the back of the tile, improve the adhesion performance of the tile, improve its durability, especially the adhesion performance after the tile is soaked in water and after heat aging, reduce the hollow phenomenon, and improve the service life of the tile.

[0042] 2. The bead-effect remover of the present invention has a low formulation cost, readily available raw materials, and is low in toxicity and environmentally friendly, making it suitable for different types of tiles and construction environments.

[0043] 3. The bead-effect remover of the present invention has a simple and quick application method, which improves construction efficiency and quality, is easy to operate, saves costs, and enhances safety and environmental protection. Detailed Implementation

[0044] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. In addition, it is worth noting that the raw materials involved in the present invention are all commercially available products unless otherwise specified.

[0045] The following sources of raw materials are provided as examples:

[0046] Silica nanoparticles were purchased from Xi'an Qiyue Biotechnology Co., Ltd., with a particle size of 80-100 nm.

[0047] The lipase was purchased from Jiangsu Libin Biotechnology Co., Ltd., with an enzyme activity parameter of 50,000 U / g.

[0048] Diatomaceous earth and montmorillonite were purchased from Shuntian Mineral Products Processing Plant in Lingshou County, with an average particle size of 200 mesh.

[0049] Carboxymethyl cellulose was purchased from Hebei Chenming Biotechnology Co., Ltd.

[0050] Calcium lignosulfonate was purchased from Shandong Chenming Paper Group Co., Ltd., model number CMC-LS.

[0051] The fatty acid methyl ester sulfonate was purchased from Jiangsu Haian Petrochemical Plant, model MES-70.

[0052] The calcium carbonate was purchased from Anhui Huasheng Co., Ltd., model number HS-325, with an average particle size of 45 micrometers.

[0053] The polyvinyl alcohol was purchased from Shanghai Huayi Group, model number 1788.

[0054] Example 1

[0055] This embodiment provides a bead-removing agent for the back of ceramic tiles, comprising the following components by weight percentage: 1% silane coupling agent, 4% acrylate-ethylene carbonate copolymer latex powder, 3% silica nanoparticles, 10% alkaline component, 6% bio-based surfactant, 1% lipase, 10% adsorbent, and 65% filler.

[0056] The silane coupling agent is γ-aminopropyltriethoxysilane;

[0057] The alkaline component is sodium bicarbonate;

[0058] The bio-based surfactant is a mixture of calcium lignin sulfonate and fatty acid methyl ester sulfonate in a mass ratio of 1:2.

[0059] The filler is calcium carbonate;

[0060] The adsorbent is prepared as follows:

[0061] (1) Weigh out diatomaceous earth, montmorillonite and carboxymethyl cellulose in a mass ratio of 4:3:1, and mix diatomaceous earth and montmorillonite.

[0062] (2) The mixture was kept at 600°C for 3 hours, and then cooled to room temperature after the treatment was completed;

[0063] (3) Add the heat-treated mixture to 1M HCl at a solid-liquid ratio of 1:10 g / mL and stir for 1 hour;

[0064] (4) Filter and wash with deionized water until the pH is neutral, dry and then mix with carboxymethyl cellulose to obtain the adsorbent.

[0065] The preparation method of the acrylate-ethylene carbonate copolymer latex powder is as follows:

[0066] (1) Add 50 mL of deionized water to the reaction vessel, heat to 70 °C, add 0.5 g of sodium dodecyl sulfate, stir, then add 0.2 g of polyvinyl alcohol, stir, and add sodium bicarbonate to adjust the pH to 7.5;

[0067] (2) Mix 7g of butyl acrylate and 3g of vinyl acetate, stir to form a monomer mixture, add 2g of the monomer mixture to the reaction vessel for pre-emulsification;

[0068] (3) Dissolve 0.02g of potassium persulfate in 20mL of deionized water to form a potassium persulfate aqueous solution. Adjust the temperature of the reactor to 80℃. Slowly add the potassium persulfate aqueous solution and the remaining monomer mixture to the reactor. The addition time is 1 hour. After the addition is completed, continue to keep the temperature for 2 hours. After the reaction is completed, stop heating and cool to room temperature to obtain the desired solution.

[0069] (4) The above liquid material is dried by spray drying equipment to obtain the butyl acrylate-vinyl acetate copolymer latex powder.

[0070] The cleaning agent is prepared as follows:

[0071] (1) Weigh the above raw material components according to the weight proportions;

[0072] (2) Mix 1g of γ-aminopropyltriethoxysilane with 3g of adsorbent so that the silane is completely absorbed by the adsorbent.

[0073] (3) Add calcium carbonate, the remaining adsorbent, sodium bicarbonate, and acrylate-ethylene carbonate copolymer latex powder to a stirrer and stir for 5 minutes.

[0074] (4) Add silica nanoparticles and bio-based surfactants to the stirrer in step (3) and continue stirring for 10 min;

[0075] (5) Add the lipase and the γ-aminopropyltriethoxysilane / adsorbent mixture treated in step (2) to the stirrer in step (4) and continue stirring for 10 minutes to obtain the scavenger.

[0076] Example 2

[0077] This embodiment provides a bead-removing agent for the back of ceramic tiles, comprising the following components by weight percentage: 1.5% silane coupling agent, 4% acrylate-ethylene carbonate copolymer latex powder, 2% silica nanoparticles, 12% alkaline component, 8% bio-based surfactant, 1.5% lipase, 11% adsorbent, and 60% filler.

[0078] The silane coupling agent is γ-aminopropyltriethoxysilane;

[0079] The alkaline component is sodium hydroxide;

[0080] The bio-based surfactant is a mixture of calcium lignosulfonate and fatty acid methyl ester sulfonate in a mass ratio of 1:3.

[0081] The filler is kaolin;

[0082] The preparation methods of the adsorbent and the acrylate-ethylene carbonate copolymer latex powder are the same as in Example 1;

[0083] The preparation method of the cleaning agent is the same as that in Example 1.

[0084] Example 3

[0085] This embodiment provides a bead-removing agent for the back of ceramic tiles, comprising the following components by weight percentage: 2% silane coupling agent, 3% acrylate-ethylene carbonate copolymer latex powder, 3% silica nanoparticles, 15% alkaline component, 5% bio-based surfactant, 1% lipase, 10% adsorbent, and 61% filler.

[0086] The silane coupling agent is γ-methacryloxypropyltrimethoxysilane;

[0087] The alkaline component is sodium hydroxide;

[0088] The bio-based surfactant is a mixture of calcium lignin sulfonate and fatty acid methyl ester sulfonate in a mass ratio of 1:1.

[0089] The filler is kaolin;

[0090] The preparation methods of the adsorbent and the acrylate-ethylene carbonate copolymer latex powder are the same as in Example 1;

[0091] The preparation method of the cleaning agent is the same as that in Example 1.

[0092] Comparative Example 1

[0093] This comparative example provides a bead-removing agent for the back of ceramic tiles, comprising the following components by weight percentage: 1% silane coupling agent, 4% acrylate-ethylene carbonate copolymer latex powder, 10% alkaline component, 6% bio-based surfactant, 1% lipase, 10% adsorbent, and 68% filler.

[0094] The silane coupling agent is γ-aminopropyltriethoxysilane;

[0095] The alkaline component is sodium bicarbonate;

[0096] The bio-based surfactant is a mixture of calcium lignin sulfonate and fatty acid methyl ester sulfonate in a mass ratio of 1:2.

[0097] The filler is calcium carbonate;

[0098] The preparation methods of the adsorbent and the acrylate-ethylene carbonate copolymer latex powder are the same as in Example 1.

[0099] In the preparation method of the scavenger, step (4) does not involve the addition of silica nanoparticles, and the rest is the same as in Example 1.

[0100] Comparative Example 2

[0101] This comparative example provides a bead-removing agent for the back of ceramic tiles, comprising the following components by weight percentage: 1% silane coupling agent, 4% acrylate latex powder, 3% silica nanoparticles, 10% alkaline component, 6% bio-based surfactant, 1% lipase, 10% adsorbent, and 65% filler.

[0102] The silane coupling agent is γ-aminopropyltriethoxysilane;

[0103] The alkaline component is sodium bicarbonate;

[0104] The bio-based surfactant is a mixture of calcium lignin sulfonate and fatty acid methyl ester sulfonate in a mass ratio of 1:2.

[0105] The filler is calcium carbonate;

[0106] The preparation method of the adsorbent is the same as that in Example 1;

[0107] In the preparation method of the cleaning agent, step (3) replaces the acrylate-ethylene carbonate copolymer latex powder with acrylate latex powder, and the rest is the same as in Example 1.

[0108] Comparative Example 3

[0109] This comparative example provides a bead-removing agent for the back of ceramic tiles, comprising the following components by weight percentage: 1% silane coupling agent, 4% acrylate-ethylene carbonate copolymer latex powder, 3% silica nanoparticles, 10% alkaline component, 6% bio-based surfactant, 10% adsorbent, and 66% filler.

[0110] The silane coupling agent is γ-aminopropyltriethoxysilane;

[0111] The alkaline component is sodium bicarbonate;

[0112] The bio-based surfactant is a mixture of calcium lignin sulfonate and fatty acid methyl ester sulfonate in a mass ratio of 1:2.

[0113] The filler is calcium carbonate;

[0114] The preparation method of the adsorbent is the same as that in Example 1;

[0115] The preparation method of the acrylate-ethylene carbonate copolymer latex powder is the same as that in Example 1.

[0116] In the preparation method of the scavenger, step (5) does not involve the addition of lipase, and the rest is the same as in Example 1.

[0117] Comparative Example 4

[0118] This comparative example provides a bead-removing agent for the back of ceramic tiles, comprising the following components by weight percentage: 1% silane coupling agent, 4% acrylate-ethylene carbonate copolymer latex powder, 3% silica nanoparticles, 10% alkaline component, 6% sodium dodecyl sulfate, 1% lipase, 10% adsorbent, and 65% filler.

[0119] The silane coupling agent is γ-aminopropyltriethoxysilane;

[0120] The alkaline component is sodium bicarbonate;

[0121] The filler is calcium carbonate;

[0122] The preparation methods of the adsorbent and the acrylate-ethylene carbonate copolymer latex powder are the same as in Example 1.

[0123] The surfactant in step (4) of the preparation method of the cleaning agent is sodium dodecyl sulfate, and the rest is the same as in Example 1.

[0124] Comparative Example 5

[0125] This embodiment provides a bead-removing agent for the back of ceramic tiles, comprising the following components by weight percentage: 1% silane coupling agent, 12% acrylate-ethylene carbonate copolymer latex powder, 1% silica nanoparticles, 10% alkaline component, 2% bio-based surfactant, 1% lipase, 5% adsorbent, and 68% filler.

[0126] The silane coupling agent is γ-aminopropyltriethoxysilane;

[0127] The alkaline component is sodium bicarbonate;

[0128] The bio-based surfactant is lignin sulfonate;

[0129] The filler is calcium carbonate;

[0130] The preparation method of the acrylate-ethylene carbonate copolymer latex powder is the same as that in Example 1.

[0131] The preparation method of the cleaning agent is the same as that in Example 1.

[0132] Performance testing:

[0133] Take 10g of the cleaning agent prepared in Examples 1-3 and Comparative Examples 1-5 respectively, disperse it in 2kg of water, spray it on the back of the tile, let it act for 10 minutes, wipe off the liquid with a towel, and then apply adhesive to the tile. The adhesive used is Dega TTB II enhanced tile adhesive. The untreated group was not treated with the cleaning agent and was directly applied and laid. Each group has 20 parallel samples.

[0134] The tensile bond strength was tested according to the test method of JC / T 547-2017 "Ceramic Tile Adhesives", and the hollow rate of the tiles was tested according to GB50209-2010 "Code for Acceptance of Construction Quality of Building Ground Engineering". The test results are shown in Table 1.

[0135] Table 1: Performance Tests

[0136]

[0137] The above test results show that the cleaning agent prepared in this invention effectively improves the bonding effect of tiles and reduces the hollow rate of tiles after being applied to them. In the formula, the silica nanoparticles, silane coupling agent, and acrylate-ethylene carbonate copolymer latex powder work together to form a dual mechanism of chemical bridging and physical anchoring, further enhancing the bonding strength between the tile and the adhesive. In Comparative Example 1, without the addition of silica nanoparticles, the micropores on the tile surface are not filled, making it easy for moisture and air to penetrate. Simultaneously, the lack of physical anchoring points weakens the interfacial bonding force between the tile and the adhesive, making them prone to separation under external force. Furthermore, the poor wettability of the tile surface prevents the adhesive from fully spreading and penetrating, easily forming cavities and causing hollowing. Ultimately, this results in a decrease in the tensile bonding strength and durability of the tiles treated with the prepared cleaning agent, and an increase in the hollow rate. In Comparative Example 2, replacing the acrylate-ethylene tert-carbonate copolymer latex powder with acrylate latex powder reduced the film's flexibility, water resistance, weather resistance, and compatibility with the ceramic tile, making the tile prone to brittle cracking under stress, leading to adhesion failure and hollowing.

[0138] In the aforementioned formulation, the lipase and lignin sulfonate / fatty acid methyl ester sulfonate work together to improve the cleanliness, wettability, and interfacial adhesion of the tile surface, thereby increasing the bond strength between the tile and the adhesive and reducing the hollow rate. Therefore, in Comparative Example 3, the absence of lipase results in the inability to effectively remove grease and other contaminants from the tile surface, leading to insufficient adhesive adhesion and reduced tensile bond strength. Simultaneously, insufficient wettability of the tile surface prevents the adhesive from fully penetrating and spreading, resulting in poor adhesion. In Comparative Example 4, replacing the bio-based surfactant with sodium dodecyl sulfate resulted in a decrease in both the tensile bond strength and durability of the tile. This may be because sodium dodecyl sulfate has lower dispersibility in the system compared to lignin sulfonate / fatty acid methyl ester sulfonate, leading to aggregation or uneven distribution of the formulation components and affecting overall performance. Furthermore, sodium dodecyl sulfate may be less stable than lignin sulfonate / fatty acid methyl ester sulfonate during long-term use and is more susceptible to environmental factors, leading to a decline in bonding performance.

[0139] The alteration of the formulation ratio in Comparative Example 5 also led to a decrease in the tensile bond strength and durability of the tiles, demonstrating that the formulation ratio of this invention has a significant impact on the product's performance. Improper component ratios can weaken interfacial bonding, particularly an improper ratio of bio-based surfactants, silane coupling agents, and copolymer latex powder, which affects the bonding effect. An improper ratio of copolymer latex powder and silica nanoparticles may lead to a decrease in the mechanical properties of the coating, reducing tensile bond strength. An improper ratio of bio-based surfactants and lipases may result in insufficient wetting, preventing the adhesive from fully penetrating and spreading on the tile surface, increasing the risk of delamination. An improper ratio of silane coupling agents and silica nanoparticles may weaken interfacial bonding, making the tiles prone to separation under external forces, leading to delamination. An improper ratio of copolymer latex powder and other components may reduce the coating's water resistance and weather resistance, increasing the risk of delamination.

[0140] The above description represents the preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A bead effect remover for the back of a ceramic tile, characterized in that, The composition comprises the following components by mass percentage: silane coupling agent 0.5-5%, butyl acrylate-vinyl acetate copolymer latex powder 2-10%, silicon dioxide nanoparticles 1-8%, alkaline component 8-20%, bio-based surfactant 3-10%, lipase 1-5%, adsorbent 8-20%, and filler 40-70%; The bio-based surfactant is a mixture of lignin sulfonate and fatty acid methyl ester sulfonate, and the mass ratio of the two is 1:1-3; The adsorbent is obtained by mixing diatomite and montmorillonite after modification, and then mixing with carboxymethyl cellulose, and the modification method is as follows: (1) Diatomite, montmorillonite and carboxymethyl cellulose are weighed according to the proportion, and the diatomite and montmorillonite are mixed; (2) The mixture is treated at 500-600℃ for 2-5 hours, and then cooled to room temperature; (3) The mixture after heat treatment is added to 1M HCl, and the solid-liquid ratio is 1:8-15 g / mL, and stirred for 1-2 hours; (4) Filter and wash with deionized water until the pH is neutral, dry, and then mix with carboxymethyl cellulose to obtain the adsorbent; The mass ratio of diatomite, montmorillonite and carboxymethyl cellulose is 4-5:3-4:1; The filler is selected from one or more of kaolin, calcium carbonate and talc.

2. The bead effect remover for the back of a ceramic tile according to claim 1, characterized in that, The composition comprises the following components by mass percentage: silane coupling agent 0.5-2%, butyl acrylate-vinyl acetate copolymer latex powder 3-5%, silicon dioxide nanoparticles 2-4%, alkaline component 10-15%, bio-based surfactant 5-8%, lipase 1-2%, adsorbent 10-15%, and filler 60-70%.

3. The bead effect remover for the back of a ceramic tile according to claim 1, characterized in that, The silane coupling agent is selected from one or more of γ-aminopropyl triethoxysilane, γ-methacryloyloxypropyl trimethoxysilane and N-β-(aminoethyl)-γ-aminopropyl trimethoxysilane.

4. The bead effect remover for the back of a ceramic tile according to claim 1, characterized in that, The butyl acrylate-vinyl acetate copolymer latex powder is prepared by the following method: (1) Deionized water is added to a reaction kettle, heated to 60-80℃, sodium dodecyl sulfate and polyvinyl alcohol are added and stirred uniformly, and sodium bicarbonate is added to adjust the pH value to 7-8; (2) The monomers butyl acrylate and vinyl acetate are mixed to form a monomer mixture, and part of the monomer mixture is added to the reaction kettle for pre-emulsification; (3) The temperature of the reaction kettle is adjusted to 70-80℃, and the remaining monomer mixture and potassium persulfate aqueous solution are added dropwise into the reaction kettle, the dropping time is 1-2h, after the dropping is completed, the reaction is continued for 1-2h, after the reaction is completed, the heating is stopped, and the temperature is cooled to room temperature to obtain the required liquid; (4) The above liquid is dried by a spray drying device to obtain the butyl acrylate-vinyl acetate copolymer latex powder.

5. The bead effect remover for the back of a ceramic tile according to claim 4, characterized in that, The mass ratio of butyl acrylate and vinyl acetate is 1.5-3:1, the mass of sodium dodecyl sulfate is 1-5% of the total amount of monomers, the mass of polyvinyl alcohol is 0.5-3% of the total amount of monomers, and the mass of potassium persulfate is 0.1-0.5% of the total amount of monomers.

6. The bead effect remover for the back of a ceramic tile according to claim 4, characterized in that, The mass of the part of the monomer mixture in step (2) is 10-30% of the total mass of the monomer mixture.

7. The bead effect remover for the back of a ceramic tile according to claim 1, characterized in that, The basic component is selected from one or more of sodium hydroxide, sodium carbonate, sodium bicarbonate, sodium silicate, trisodium phosphate, potassium hydroxide.

8. A method for preparing a bead effect remover for the back of a ceramic tile according to any one of claims 1 to 7, comprising the following steps: (1) weighing each component by weight fraction; (2) mixing the silane coupling agent with 20-40% of the adsorbent by mass, so that the silane coupling agent is completely absorbed by the adsorbent; (3) adding the remaining adsorbent, filler, basic component, and butyl acrylate-vinyl acetate copolymer latex powder into a stirrer and stirring for 5-10 min; (4) adding the silica nanoparticles and biosurfactant into the stirrer of step (3) and continuing to stir for 10-20 min; (5) adding the lipase and the silane coupling agent / adsorbent mixture treated in step (2) into the stirrer of step (4) and continuing to stir for 10-20 min, to obtain the remover.

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