Ceramic tile renovation interface putty and preparation method thereof

Abstract

The invention discloses ceramic tile renovation interface putty and a preparation method thereof, and belongs to the technical field of building decoration materials. The putty is of a two-component system, the powder component A adopts coarse, medium and fine three-level grain composition design and is added with a composite functional aid, the glue component B takes acrylic acid modified silicon resin emulsion as a main body, and the two components are mixed according to the proportion of (1-2): 1. During preparation, the stable performance of the product is ensured through a step-by-step premixing process of the powder components, a low-temperature stirring process of the glue components and a secondary stirring process before construction. Through the synergistic effect of multiple components, the problems that an existing tile renovating material is poor in adhesive force, weak in water resistance, prone to hollowing and falling and the like are effectively solved, the tile renovating material has the advantages of being high in bonding strength, low in drying shrinkage rate, good in water resistance stability, convenient to construct and the like, can be directly constructed on the surface of an old tile, does not need to remove an old layer, and is high in renovating efficiency and high in practicability.

Description

Technical Field

[0001] This invention relates to the field of building decoration materials technology, specifically to a ceramic tile renovation interface putty and its preparation method. Background Technology

[0002] In building renovation projects, the resurfacing of old tiled walls is a common requirement. Traditional renovation methods require the complete removal of the old tiles before base treatment and subsequent decoration. This process is not only cumbersome and time-consuming but also generates a large amount of construction waste, leading to high renovation costs. To address this issue, renovation materials that can be applied directly to old tile surfaces have emerged in the industry. However, existing products are mostly single-component putty or ordinary two-component mortar, and generally suffer from core technical defects: Firstly, the bonding between the putty and the tile glaze relies solely on physical adsorption, resulting in insufficient adhesion and a tendency for hollowing and peeling after long-term use. Secondly, unreasonable powder gradation design leads to high shrinkage and cracking rates in the putty, and a lack of targeted functional additives results in poor overall performance in terms of water resistance and crack resistance. Furthermore, existing materials often use fixed proportions and rely heavily on ordinary acrylic emulsions as binders, resulting in weak interfacial bonding capabilities. This makes them unsuitable for the surface characteristics of different types of tiles, such as vitrified tiles and glazed tiles, and fails to meet the renovation needs of various scenarios, including indoor and outdoor renovations, and load-bearing and non-load-bearing applications. Therefore, developing a tile renovation putty that combines high adhesion, high strength, low shrinkage, and flexible adaptability to various scenarios has become an urgent technical problem to be solved in the current building decoration materials field. Summary of the Invention

[0003] To address the aforementioned problems, this invention proposes a tile renovation interface putty and its preparation method. This putty is a two-component composite system that combines the core properties of high adhesion, high strength, and low shrinkage. It also exhibits excellent performance in terms of water resistance, crack resistance, and construction adaptability. It can flexibly adapt to different types of old tile surfaces such as vitrified tiles and glazed tiles, meeting the application needs of various tile renovation scenarios, including indoor and outdoor, load-bearing and non-load-bearing applications.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A type of tile renovation interface putty is a two-component system, consisting of powder component A and adhesive component B mixed in a weight ratio of (1-2):1. The putty is prepared from the following raw materials in parts by weight: Powder component A: 40-60 parts black cement, 30-50 parts sand with three-level particle size distribution (coarse, medium and fine), 5-10 parts fine filler, and 1.6-3.3 parts functional additives; Component B: 80-100 parts of acrylic modified silicone resin emulsion, 5-15 parts of special additives, and 0-10 parts of water.

[0005] Optionally, in the three-graded sand, 40-60 mesh coarse aggregate accounts for 30-40% of the total sand, 60-80 mesh medium aggregate accounts for 40-50%, and 80-120 mesh fine aggregate accounts for 10-20%.

[0006] Optionally, the fine filler is a mixture of 200-300 mesh heavy calcium carbonate powder and quartz powder in a 1:1 mass ratio.

[0007] Optionally, the functional additives include 0.1-0.3 parts of basalt fiber, 0.5-1.0 parts of thixotropic lubricant, 0.1-0.2 parts of water-reducing agent, and 0.9-1.8 parts of cellulose ether water-retaining agent.

[0008] Optionally, the special additives include 0.5-1.5 parts of wetting agent, 0.3-0.8 parts of defoamer, 2-5 parts of film-forming aid, 0.2-0.7 parts of preservative, and 1-3 parts of zirconia sol water resistance enhancer.

[0009] Optionally, the thixotropic lubricant is a mixture of modified bentonite and polyetheramine in a 2:1 mass ratio.

[0010] Optionally, after the powder component A and the adhesive component B are mixed, the putty penetration is 100-120mm.

[0011] Optionally, the preparation method of the tile renovation interface putty is as follows: S1. Using a conical double-helix mixer, black cement and basalt fiber are added to the mixer and pre-mixed at 300-400 rpm for 5 minutes until the fiber is evenly dispersed. Then, graded sand, fine filler, thixotropic lubricant, water-reducing agent and cellulose ether water-retaining agent are added in sequence. The speed is adjusted to 500-600 rpm and the mixing continues for 7-10 minutes until the mixture is uniform, thus obtaining powder component A. After discharge, it is packaged in a moisture-proof sealed bag. S2. Using a paddle-type stirred tank with a temperature control device, add acrylic modified silicone resin emulsion and water into the tank, control the temperature inside the tank at 20-30℃, and stir at a low speed of 80-120 rpm. Add wetting agent, film-forming aid, zirconia sol water-resistant reinforcing agent, defoamer and preservative in sequence. After each addition of the additive, keep stirring for 1-2 minutes. After all the additives have been added, continue stirring for 5-10 minutes until the system is homogeneous and free of particles. After filtering through a 100-120 mesh filter, obtain adhesive component B, which is packaged in a sealed container. S3. Take powder component A and adhesive component B by weight ratio (1-2):1, add them to a planetary electric mixer, and mechanically stir at 600-800 rpm for 3-5 minutes until a uniform paste without particles is formed; let it stand and mature for 2-5 minutes at 20-25℃ and 40-70% relative humidity, then stir at 1000-1200 rpm for 1 minute before applying.

[0012] The beneficial effects of this invention are as follows: The interface putty prepared by this invention has excellent bonding performance, with a tensile bonding strength of 2.0-2.5 MPa on smooth ceramic tile glaze surfaces and a drying shrinkage rate of ≤0.3%, effectively avoiding problems such as hollowing, detachment, and cracking; the dual chemical bonding formed by the silane-acrylic bifunctional modified emulsion significantly improves the adhesion and long-term stability to the old ceramic tile substrate; the precise three-level particle gradation makes the putty structure dense, balancing high strength and smooth construction; the synergistic effect of composite functional additives and water-resistant reinforcing agents enhances water resistance and weather resistance; the adjustable powder-adhesive ratio is suitable for different tile types and various indoor and outdoor scenarios, achieving a comprehensive effect of high adhesion, low shrinkage, convenient construction, and wide applicability. Attached Figure Description

[0013] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0014] Figure 1 This is a bar chart comparing the tensile bond strength and water-resistant tensile bond strength of different samples of the present invention. Figure 2 This is a comparison chart of the drying shrinkage rate and cone penetration of different samples of the present invention. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0016] Example 1: This Example 1 describes a method for preparing a tile renovation interface putty. The putty is prepared from the following raw materials in parts by weight: Powder component A: 50 parts black cement, 40 parts sand with three particle size distributions (35% 40-60 mesh, 45% 60-80 mesh, and 20% 80-120 mesh), 8 parts fine filler (200-300 mesh heavy calcium carbonate powder: quartz powder = 1:1), 2.5 parts functional additives (0.2 parts basalt fiber, 0.8 parts thixotropic lubricant (modified bentonite: polyetheramine = 2:1), 0.15 parts water-reducing agent, and 1.35 parts cellulose ether water-retaining agent); Component B: 90 parts acrylic modified silicone resin emulsion, 10 parts special additives (1.0 part wetting agent, 0.5 part defoamer, 3 parts film-forming aid, 0.5 part preservative, 2 parts zirconia sol water resistance reinforcing agent), and 5 parts water; This embodiment describes a method for preparing a tile renovation interface putty, the specific preparation steps of which are as follows: S1. Select a conical double spiral mixer, weigh 50 parts of black cement, 40 parts of graded sand, 8 parts of fine filler (heavy calcium carbonate powder: quartz powder = 1:1) and 2.5 parts of functional additives. First, pre-mix the black cement and basalt fiber at 350 rpm for 5 minutes, then add the remaining raw materials in sequence, adjust the speed to 550 rpm and mix for 8 minutes until uniformly mixed. After discharge, package it in a moisture-proof sealed bag to prepare powder component A, and store it in a dry and ventilated environment. S2. Using a paddle-type stirred tank with a temperature control device, weigh 90 parts of acrylic modified silicone resin emulsion, 10 parts of special additives, and 5 parts of deionized water. Add the emulsion and water into the tank, control the temperature at 25℃, and stir at 100 rpm for 5 minutes. Then add the additives in the following order: wetting agent, film-forming aid, zirconia sol water-resistant reinforcing agent, defoamer, and preservative. Stir for 1.5 minutes at each step. After all the additives are added, continue stirring for 7 minutes. After filtering through a 110-mesh filter, put it into a sealed container to prepare adhesive component B, and store it in an environment of 20-30℃. S3. Using a planetary electric mixer, mix powder component A and adhesive component B at a weight ratio of 1.5:1. Mix at 700 rpm for 4 minutes until a uniform paste is formed. Let it stand and mature for 3 minutes, then mix at 1100 rpm for 1 minute. If the measured value is 110 mm using a cone penetration meter, it is a qualified finished product and can be directly applied.

[0017] Example 2: This Example 2 describes a method for preparing a tile renovation interface putty. The putty is prepared from the following raw materials in parts by weight: Powder component A: 50 parts black cement, 40 parts sand with three particle size distributions (35% 40-60 mesh, 45% 60-80 mesh, and 20% 80-120 mesh), 8 parts fine filler (200-300 mesh heavy calcium carbonate powder: quartz powder = 1:1), 2.5 parts functional additives (0.2 parts basalt fiber, 0.8 parts thixotropic lubricant (modified bentonite: polyetheramine = 2:1), 0.15 parts water-reducing agent, and 1.35 parts cellulose ether water-retaining agent); Component B: 90 parts acrylic modified silicone resin emulsion, 10 parts special additives (1.0 part wetting agent, 0.5 part defoamer, 3 parts film-forming aid, 0.5 part preservative, 2 parts zirconia sol water resistance reinforcing agent), and 5 parts water; In this embodiment, the preparation method of the tile renovation interface putty is the same as that in Example 1, except that the ratio of powder component A and adhesive component B is adjusted to 1:1.

[0018] Example 3: This Example 3 describes a method for preparing a tile renovation interface putty. The putty is prepared from the following raw materials in parts by weight: Powder component A: 50 parts black cement, 40 parts sand with three particle size distributions (35% 40-60 mesh, 45% 60-80 mesh, and 20% 80-120 mesh), 8 parts fine filler (200-300 mesh heavy calcium carbonate powder: quartz powder = 1:1), 2.5 parts functional additives (0.2 parts basalt fiber, 0.8 parts thixotropic lubricant (modified bentonite: polyetheramine = 2:1), 0.15 parts water-reducing agent, and 1.35 parts cellulose ether water-retaining agent); Component B: 90 parts acrylic modified silicone resin emulsion, 10 parts special additives (1.0 part wetting agent, 0.5 part defoamer, 3 parts film-forming aid, 0.5 part preservative, 2 parts zirconia sol water resistance reinforcing agent), and 5 parts water; The preparation method of the tile renovation interface putty in this embodiment is the same as that in Example 1, except that the ratio of powder component A and adhesive component B is adjusted to 2:1.

[0019] Comparative Example 1: The putty of Comparative Example 1 was prepared from the following parts by weight of raw materials: Powder component A: 50 parts black cement, 40 parts sand with three particle size distributions (35% 40-60 mesh, 45% 60-80 mesh, and 20% 80-120 mesh), 8 parts fine filler (200-300 mesh heavy calcium carbonate powder: quartz powder = 1:1), 2.5 parts functional additives (0.2 parts basalt fiber, 0.8 parts thixotropic lubricant (modified bentonite: polyetheramine = 2:1), 0.15 parts water-reducing agent, and 1.35 parts cellulose ether water-retaining agent); Component B: 90 parts acrylic emulsion, 10 parts special additives (1.0 part wetting agent, 0.5 part defoamer, 3 parts film-forming aid, 0.5 part preservative, 2 parts zirconia sol water resistance enhancer), 5 parts water; The putty in this comparative example is prepared using the same method as in Example 1, except that the acrylic-modified silicone resin emulsion is replaced with an acrylic emulsion.

[0020] Comparative Example 2: The putty of Comparative Example 2 was prepared from the following parts by weight of raw materials: Powder Component A: 50 parts black cement, 40 parts sand (60-80 mesh), 8 parts fine filler (200-300 mesh heavy calcium carbonate powder: quartz powder = 1:1), 2.5 parts functional additives (0.2 parts basalt fiber, 0.8 parts thixotropic lubricant (modified bentonite: polyetheramine = 2:1), 0.15 parts water-reducing agent, 1.35 parts cellulose ether water-retaining agent); Component B: 90 parts acrylic modified silicone resin emulsion, 10 parts special additives (1.0 part wetting agent, 0.5 part defoamer, 3 parts film-forming aid, 0.5 part preservative, 2 parts zirconia sol water resistance reinforcing agent), and 5 parts water; The putty preparation method in this comparative example is the same as in Example 1, except that the sand is replaced with 60-80 mesh single-mesh sand.

[0021] Comparative Example 3: The putty of Comparative Example 3 was prepared from the following parts by weight of raw materials: Powder component A: 50 parts black cement, 40 parts sand with three particle size distributions (35% 40-60 mesh, 45% 60-80 mesh, and 20% 80-120 mesh), 8 parts fine filler (200-300 mesh heavy calcium carbonate powder: quartz powder = 1:1), 2.3 parts functional additives (0.8 parts thixotropic lubricant (modified bentonite: polyetheramine = 2:1), 0.15 parts water-reducing agent, and 1.35 parts cellulose ether water-retaining agent); Component B: 90 parts acrylic modified silicone resin emulsion, 10 parts special additives (1.0 part wetting agent, 0.5 part defoamer, 3 parts film-forming aid, 0.5 part preservative, 2 parts zirconia sol water resistance reinforcing agent), and 5 parts water; The putty in this comparative example is prepared using the same method as in Example 1, except that basalt fibers are not added.

[0022] Performance testing 1. Tensile bond strength test Using clean and dry glazed ceramic tiles as the substrate, the prepared putty sample was evenly applied to the tile surface with a thickness controlled at 2.0±0.2mm. It was then cured for 7 days at a temperature of 23±2℃ and a relative humidity of 50±5%. A 40mm×40mm tensile test block was then attached to the putty layer and cured for a total curing period of 14 days. A tensile test was then performed using an electronic tensile testing machine at a uniform speed of 5mm / min. The maximum destructive load when the test block detached was recorded, and the tensile bond strength was calculated.

[0023] Table 1. Test data of tensile bond strength of different samples

[0024] The tensile bond strength of Examples 1-3 was 2.22-2.45 MPa, which was significantly higher than that of the comparative examples. This indicates that the formulation of the present invention (synergistic effect of acrylic modified silicone resin emulsion, three-graded sand and basalt fiber) can greatly improve the bonding stability between putty and tile glaze, and meet the requirements for firm adhesion of the renovation interface.

[0025] 2. Water-resistant tensile bond strength test Clean, dry glazed ceramic tiles were used as the substrate. Prepared tile renovation interface putty was evenly applied, with a thickness controlled at 2.0±0.2 mm. The tiles were cured for 7 days at a temperature of 23±2℃ and a relative humidity of 50±5%. Subsequently, the test blocks were completely immersed in distilled water at 23±2℃ for 48 hours. After removal, they were air-dried in the same environment for 2 hours. A 40mm×40mm tensile test block was then adhered to the putty layer surface, and curing continued for a total curing period of 14 days. Tensile tests were conducted using an electronic tensile testing machine at a uniform speed of 5 mm / min. The maximum destructive load when the test block detached was recorded, and the water-resistant tensile bond strength was calculated.

[0026] Table 2. Test data of water resistance tensile bond strength of different samples

[0027] The water-resistant tensile bond strength of the example reached 2.10-2.30 MPa, which is far superior to that of the comparative example, indicating that the putty of the present invention can still maintain excellent bonding performance after being immersed in water, effectively solving the problems of poor water resistance and easy peeling of traditional putty.

[0028] 3. Drying shrinkage rate The prepared putty sample was placed into a 40mm×40mm×160mm molding mold and cured for 24 hours at a temperature of (23±2)℃ and a relative humidity of (50±5)%. After curing, the sample was demolded and the initial length of the specimen was measured using a drying shrinkage meter (accurate to 0.01mm). Then, the sample was cured in a standard environment for 28 days and the length of the specimen was measured again. Three parallel samples were set up for each group. The drying shrinkage rate was calculated based on the difference between the initial length and the length after 28 days (shrinkage rate = (initial length - final length) / initial length × 100%).

[0029] Table 3. Test data on drying shrinkage rate of different samples

[0030] The drying shrinkage rate of the example was only 0.18%-0.22%, significantly lower than that of the comparative example, confirming that the combination of basalt fiber and composite additives can effectively inhibit shrinkage deformation during the drying process of putty and reduce the risk of cracking.

[0031] 4. Crack resistance test According to the JG / T 298-2010 standard, an asbestos cement board with dimensions of 300mm×300mm×5mm was selected as the substrate. After the surface was cleaned and dried, the prepared putty sample was evenly applied and the thickness was controlled to be 2.0±0.2mm. It was cured for 28 days in a standard environment with a temperature of (23±2)℃ and a relative humidity of (50±5)%. During the curing period, the surface of the putty layer was regularly observed for cracking, peeling and other phenomena. Finally, the crack resistance level was evaluated based on the presence, number and length of visible cracks.

[0032] Table 4 Crack resistance test data for different samples

[0033] No cracks were observed in the examples after 28 days of curing, while obvious or fine cracks appeared in the comparative examples. This indicates that the present invention significantly improves the crack resistance of the putty layer and ensures long-term stability through the synergistic design of three-grade aggregate and crack-resistant fibers.

[0034] 5. Construction feasibility test According to the JG / T 298-2010 standard, under an environment of temperature (23±2)℃ and relative humidity (50±5)%, a flat and clean cement mortar substrate is selected. Common building trowels (horn scrapers) are used to continuously trowel the prepared putty sample with normal construction force and speed. The smoothness, leveling, stickiness to the trowel, and presence of obvious brush marks or graininess of the putty are observed. At the same time, the maximum thickness of a single trowel application and the ease of finishing are recorded. The workability grade is comprehensively evaluated.

[0035] Table 5. Construction Performance Test Data for Different Samples

[0036] All examples showed smooth application and good finish, while comparative examples 1-2 had problems such as sticking to the tool and roughness. This indicates that the ratio of thixotropic lubricant and water-retaining agent in this invention is reasonable, taking into account both ease of construction and molding effect, and meeting the actual construction needs.

[0037] 6. Surface drying / actual drying time test According to JG / T 298-2010 standard, under an environment of temperature (23±2)℃ and relative humidity (50±5)%, the prepared putty sample was evenly applied to a clean and dry cement mortar substrate, with the coating thickness controlled at 2.0±0.2mm. The surface drying time was determined by the finger touch method. At specified intervals, the putty surface was lightly touched with a clean finger. When the finger no longer felt sticky and no putty adhered to it, it was considered surface dry. The actual drying time was determined by the indentation method. After the surface was dry, the putty surface was lightly pressed with a 1mm diameter metal needle at specified intervals. When the indentation depth did not exceed 0.5mm and the putty layer did not show obvious deformation, it was considered actual dry. The corresponding times for surface drying and actual drying were recorded respectively.

[0038] Table 6. Test data on surface drying / complete drying time of different samples

[0039] The surface drying time of the example is 3.2-3.8 hours and the actual drying time is 22-26 hours, which is significantly shorter than that of the comparative example, demonstrating that the formula of the present invention can improve construction efficiency, shorten the construction period, and is more practical.

[0040] 7. Cone penetration test Under standard conditions of (23±2)℃ and (50±5)% relative humidity, a well-stirred putty sample is placed in a clean container and tested using a standard cone penetration tester. The standard cone is vertically aligned with the sample surface, and the cone is released to allow it to sink freely into the putty. After holding for 5 seconds, the depth of the cone penetration is read. The test is repeated 3 times and the average value is taken as the cone penetration of the sample.

[0041] Table 7. Cone penetration test data for different samples

[0042] The cone penetration of the example was 105-115mm, which is within the suitable consistency range for construction and is better than the comparative example. This indicates that the putty's fluidity and thixotropy are well matched, ensuring uniformity of application and ease of work.

[0043] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A type of tile renovation interface putty, characterized in that, This is a two-component system, consisting of powder component A and adhesive component B mixed in a weight ratio of (1-2):

1. The putty is prepared from the following raw materials in parts by weight: Powder component A: 40-60 parts black cement, 30-50 parts sand with three-level particle size distribution (coarse, medium and fine), 5-10 parts fine filler, and 1.6-3.3 parts functional additives; Component B: 80-100 parts of acrylic modified silicone resin emulsion, 5-15 parts of special additives, and 0-10 parts of water.

2. The tile renovation interface putty according to claim 1, characterized in that, In the three-graded sand, 40-60 mesh coarse aggregate accounts for 30-40% of the total sand, 60-80 mesh medium aggregate accounts for 40-50%, and 80-120 mesh fine aggregate accounts for 10-20%.

3. The tile renovation interface putty according to claim 1, characterized in that, The fine filler is a mixture of 200-300 mesh heavy calcium carbonate powder and quartz powder in a 1:1 mass ratio.

4. The tile renovation interface putty according to claim 1, characterized in that, The functional additives include 0.1-0.3 parts basalt fiber, 0.5-1.0 parts thixotropic lubricant, 0.1-0.2 parts water-reducing agent, and 0.9-1.8 parts cellulose ether water-retaining agent.

5. A tile renovation interface putty according to claim 1, characterized in that, The special additives include 0.5-1.5 parts wetting agent, 0.3-0.8 parts defoamer, 2-5 parts film-forming aid, 0.2-0.7 parts preservative, and 1-3 parts zirconia sol water resistance enhancer.

6. The tile renovation interface putty according to claim 4, characterized in that, The thixotropic lubricant is a mixture of modified bentonite and polyetheramine in a 2:1 mass ratio.

7. The tile renovation interface putty according to claim 1, characterized in that, After the powder component A and the adhesive component B are mixed, the putty penetration is 100-120mm.

8. A method for preparing a tile renovation interface putty, used to prepare a tile renovation interface putty as described in any one of claims 1-7, characterized in that, The specific preparation method is as follows: S1. Using a conical double-helix mixer, black cement and basalt fiber are added to the mixer and pre-mixed at 300-400 rpm for 5 minutes until the fiber is evenly dispersed. Then, graded sand, fine filler, thixotropic lubricant, water-reducing agent and cellulose ether water-retaining agent are added in sequence. The speed is adjusted to 500-600 rpm and the mixing continues for 7-10 minutes until the mixture is uniform, thus obtaining powder component A. After discharge, it is packaged in a moisture-proof sealed bag. S2. Using a paddle-type stirred tank with a temperature control device, add acrylic modified silicone resin emulsion and water into the tank, control the temperature inside the tank at 20-30℃, and stir at a low speed of 80-120 rpm. Add wetting agent, film-forming aid, zirconia sol water-resistant reinforcing agent, defoamer and preservative in sequence. After each addition of the additive, keep stirring for 1-2 minutes. After all the additives have been added, continue stirring for 5-10 minutes until the system is homogeneous and free of particles. After filtering through a 100-120 mesh filter, obtain adhesive component B, which is packaged in a sealed container. S3. Take powder component A and adhesive component B by weight ratio (1-2):1, add them to a planetary electric mixer, and mechanically stir at 600-800 rpm for 3-5 minutes until a uniform paste without particles is formed; let it stand and mature for 2-5 minutes at 20-25℃ and 40-70% relative humidity, then stir at 1000-1200 rpm for 1 minute before applying.

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