Composition for anti-floating two-component tile adhesive, preparation method and application of anti-floating two-component tile adhesive

Abstract

This invention relates to the field of building materials technology, and discloses a composition for an anti-floating slurry type two-component tile adhesive, an anti-floating slurry type two-component tile adhesive, its preparation method, and its application. The composition consists of component A and component B in a mass ratio of 1:2.5-3.5. Component A consists of a first main agent and a first auxiliary agent, wherein the first main agent is a vinyl acetate-vinyl tert-carbonate copolymer emulsion and an ethylene-vinyl acetate copolymer emulsion in a mass ratio of 1-1.5:1. Component B consists of a second main agent and a second auxiliary agent, wherein the second main agent includes cement, sand, gypsum components, and a composite water-absorbing resin; the gypsum component is a combination of quicklime and hemihydrate phosphogypsum in a mass ratio of 1:4-6. The anti-floating slurry type two-component tile adhesive provided by this invention has excellent bonding strength and mechanical properties.

Description

Technical Field

[0001] This invention relates to the field of building materials technology, specifically to a composition for anti-floating slurry type two-component tile backing adhesive, an anti-floating slurry type two-component tile backing adhesive, its preparation method and application. Background Technology

[0002] In traditional building decoration projects, the most common method is to directly lay floor tiles and wall tiles using ordinary cement mortar. However, cement mortar has the following inherent defects: low bonding strength, high elastic modulus, and large shrinkage. Under the influence of external forces such as thermal expansion and contraction, freeze-thaw cycles, and vibration, the phenomenon of detachment of facing tiles, hollowing of plaster mortar, and delamination is very serious. This not only damages the decoration effect but also endangers the safety of pedestrians below the wall, especially for high-rise buildings, where subsequent repairs are extremely difficult.

[0003] Specifically, when workers press and tap the tiles coated with cement mortar into place, cement slurry will continuously seep out from the gaps between the tiles. This slurry is not a uniform cement mortar, but a mixture of cement slurry and some fine particles, which is called laitance in the industry.

[0004] The presence of laitance can severely affect the strength and durability of ceramic tiles. This is because the cement slurry in the laitance does not penetrate well into the interior of the tile, resulting in a less dense overall structure and thus affecting the tile's mechanical properties.

[0005] CN119569104A discloses a two-component tile backing adhesive, which is prepared by mixing the following components in parts by weight: Component A: 18-22 parts water, 75-80 parts silicon-modified polymer emulsion, 0.3-0.6 parts silane coupling agent, 0.1-0.2 parts activator, 0.1-0.3 parts defoamer, and 0.2-0.4 parts thickening agent; Component B: 35-45 parts silicate cement, 15-20 parts sulfoaluminate cement, 5-8 parts activated mineral powder, 8-10 parts quartz sand, 0.2-0.4 parts thixotropic agent, and 0.3-0.5 parts retarder. The two-component tile backing adhesive prepared by this method can significantly improve the bonding strength between tiles and cement mortar due to the synergistic effect of the components. However, this formulation system has obvious defects in terms of anti-floating slurry and control of stratified bleeding, such as a single powder gradation, which easily leads to slurry-aggregate separation, a weak suspension stability system, poor resistance to bleeding slurry, and interfacial bonding defects caused by the slurry layer.

[0006] Therefore, providing a new type of anti-floating slurry tile adhesive has very important practical significance. Summary of the Invention

[0007] The purpose of this invention is to provide a two-component tile backing adhesive with excellent bonding strength and mechanical properties and anti-floating properties.

[0008] To achieve the above objectives, a first aspect of the present invention provides a two-component composition for anti-floating adhesive for ceramic tile backing, the composition comprising component A and component B in a mass ratio of 1:2.5-3.5; The A component consists of a first main agent and a first auxiliary agent, wherein the first main agent is a vinyl acetate-vinyl tert-carbonate copolymer emulsion and an ethylene-vinyl acetate copolymer emulsion with a content-to-mass ratio of 1-1.5:1; In component A, the solid content of the vinyl acetate-vinyl tert-carbonate copolymer emulsion is 50-60 wt%; the solid content of the ethylene-vinyl acetate copolymer emulsion is 50-55 wt%. Component B consists of a second main agent and a second auxiliary agent. The second main agent includes cement, sand, gypsum components and composite water-absorbing resin. The gypsum components are a combination of quicklime and hemihydrate phosphogypsum in a mass ratio of 1:4-6. Based on the total mass of component B, the content of cement is 40-50 wt%, the content of sand is 40-50 wt%, the content of gypsum component is 4-10 wt%, and the content of composite water-absorbing resin is 0.3-0.8 wt%.

[0009] A second aspect of the present invention provides a method for preparing an anti-floating slurry type two-component tile backing adhesive, the method being carried out using the components of the composition described in the first aspect above, the method comprising: 1) Preparation of liquid and powder formulations The preparation method of the liquid agent includes: bringing a first main agent and a first auxiliary agent into a first contact to obtain the liquid agent; The method for preparing the powder includes: subjecting the second main agent and the second auxiliary agent to a second contact to obtain the powder; 2) The liquid and the powder are brought into a third contact at a mass ratio of 1:2.5-3.5 to obtain the anti-floating slurry type two-component ceramic tile back adhesive.

[0010] A third aspect of the present invention provides an anti-floating slurry type two-component tile backing adhesive prepared by the method described in the second aspect above.

[0011] The fourth aspect of the present invention provides the application of the anti-floating slurry type two-component ceramic tile backing adhesive described in the third aspect above in the field of building materials.

[0012] Through the above technical solution, the present invention has at least the following beneficial technical effects: (1) The anti-floating slurry type two-component tile back adhesive provided by the present invention can greatly improve the adhesion between the tile and the substrate, significantly improve the adhesion of glazed tiles on standard concrete substrate, and ensure a firm interface bond, effectively avoid the risk of hollowing and delamination, and greatly improve the overall safety and stability of tile laying.

[0013] (2) The anti-floating slurry type two-component ceramic tile back adhesive provided by the present invention has excellent bonding strength and mechanical properties, and its anti-floating slurry is particularly outstanding. At the same time, it can effectively solve the common problems of hollowing and falling off in wet laying of vitrified tiles. Detailed Implementation

[0014] The endpoints and any values ​​of the ranges disclosed herein are not limited to the precise ranges or values, and these ranges or values ​​should be understood to include values ​​close to these ranges or values. For numerical ranges, the endpoint values ​​of the various ranges, the endpoint values ​​of the various ranges and individual point values, and individual point values ​​can be combined with each other to obtain one or more new numerical ranges, which should be considered as specifically disclosed herein.

[0015] As mentioned above, a first aspect of the present invention provides a two-component composition for anti-floating adhesive for ceramic tile backing, the composition comprising component A and component B in a mass ratio of 1:2.5-3.5; The A component consists of a first main agent and a first auxiliary agent, wherein the first main agent is a vinyl acetate-vinyl tert-carbonate copolymer emulsion and an ethylene-vinyl acetate copolymer emulsion with a content-to-mass ratio of 1-1.5:1; In component A, the solid content of the vinyl acetate-vinyl tert-carbonate copolymer emulsion is 50-60 wt%; the solid content of the ethylene-vinyl acetate copolymer emulsion is 50-55 wt%. Component B consists of a second main agent and a second auxiliary agent. The second main agent includes cement, sand, gypsum components and composite water-absorbing resin. The gypsum components are a combination of quicklime and hemihydrate phosphogypsum in a mass ratio of 1:4-6. Based on the total mass of component B, the content of cement is 40-50 wt%, the content of sand is 40-50 wt%, the content of gypsum component is 4-10 wt%, and the content of composite water-absorbing resin is 0.3-0.8 wt%.

[0016] According to a preferred embodiment, in component A, the glass transition temperature of the vinyl acetate-vinyl tert-carbonate copolymer emulsion is 0°C to 10°C, and the viscosity at 25°C is 500-1500 mPa·s. The inventors of this invention have found that, under this preferred embodiment, the anti-floating two-component tile adhesive provided by this invention has better bonding performance.

[0017] According to a preferred embodiment, the glass transition temperature of the ethylene-vinyl acetate copolymer emulsion is -10°C to 0°C, and the viscosity at 25°C is 300-1500 mPa·s.

[0018] According to one specific embodiment, the content of ethylene tert-carbonate structural units in the vinyl acetate-ethylene tert-carbonate copolymer emulsion is 55-57 wt%; and the content of ethylene structural units in the ethylene-vinyl acetate copolymer emulsion is 55-57 wt%.

[0019] In some embodiments, based on the total mass of component A, the content of the vinyl acetate-vinyl tert-carbonate copolymer emulsion is 15-25 wt%, and the content of the ethylene-vinyl acetate copolymer emulsion is 12-18 wt%.

[0020] In some embodiments, the composite absorbent resin in component B is prepared by a method comprising the following steps: (1) In the presence of water, starch is gelatinized to obtain intermediate I; (2) The intermediate I is mixed with acrylic acid, bentonite and an initiator to obtain intermediate II; (3) The intermediate II is mixed with N,N'-methylenebisacrylamide to obtain the composite water-absorbing resin; The mass ratio of the starch, water, acrylic acid, bentonite, initiator and N,N'-methylenebisacrylamide is 1:5-6:2.5-3.5:0.4-0.6:0.008-0.012:0.08-0.12.

[0021] In some embodiments, the conditions for the gelatinization process in step (1) include a temperature of 70-90°C and a time of 0.5-1.5h.

[0022] In some embodiments, in step (2), the initiator is selected from at least one of ammonium persulfate, potassium persulfate, and sodium persulfate.

[0023] In some embodiments, in step (1), the starch is sweet potato starch.

[0024] In some embodiments, the conditions for the first mixing and the second mixing each independently include: a temperature of 60-70°C and a time of 1-4 hours.

[0025] According to one specific embodiment, in component A, the first additive contains water, defoamer, dispersant and preservative; based on the total mass of component A, the water content is 50-75 wt%, the defoamer content is 0.1-0.3 wt%, the dispersant content is 0.2-0.4 wt%, and the preservative content is 0.1-0.3 wt%.

[0026] According to one specific embodiment, in component B, the cement is silicate cement with a strength grade of 42.5R.

[0027] According to one specific embodiment, in component B, the average particle diameter of the sand is 100-300 μm.

[0028] According to one specific embodiment, in component B, the second adjuvant contains 0.1-0.3 wt% cellulose based on the total mass of component B.

[0029] It should be noted that there are no particular requirements for the specific types of the defoamer, dispersant, preservative, and cellulose in this invention. Those skilled in the art can select known defoamers, dispersants, preservatives, and celluloses for application in this invention according to actual conditions. For example, the defoamer may be selected from at least one of silicone defoamers, polyether defoamers, and mineral oil defoamers; the dispersant may be selected from at least one of polyacrylate dispersants, polycarboxylic acid dispersants, and phosphate dispersants; the preservative may be selected from at least one of isothiazolinone, benzisothiazolinone, and Kathon preservative; and the cellulose may be selected from at least one of hydroxypropyl methylcellulose (HPMC), methylcellulose (MC), and hydroxyethyl cellulose (HEC).

[0030] As previously stated, a second aspect of the present invention provides a method for preparing an anti-floating slurry type two-component tile backing adhesive, the method being carried out using the components of the composition described in the first aspect above, the method comprising: 1) Preparation of liquid and powder formulations The preparation method of the liquid agent includes: bringing a first main agent and a first auxiliary agent into a first contact to obtain the liquid agent; The method for preparing the powder includes: subjecting the second main agent and the second auxiliary agent to a second contact to obtain the powder; 2) The liquid and the powder are brought into a third contact at a mass ratio of 1:2.5-3.5 to obtain the anti-floating slurry type two-component ceramic tile back adhesive.

[0031] According to one specific implementation, the conditions for the first contact, the second contact, and the third contact each independently include: a rotational speed of 500-1000 rpm and a time of 15-60 min.

[0032] According to one specific embodiment, a method for preparing an anti-floating slurry type two-component tile backing adhesive includes: S1. Add water, vinyl acetate-vinyl tert-carbonate copolymer emulsion, ethylene-vinyl acetate copolymer emulsion, defoamer, dispersant and preservative to a stirred tank and stir at 500-1000 rpm for 15-30 min to obtain a liquid. S2. Mix cement, sand, quicklime, hemihydrate phosphogypsum, composite water-absorbing resin and cellulose, and stir at 500-1000 rpm for 30-60 minutes to obtain powder. S3. The liquid and the powder, with a mass ratio of 1:2.5-3.5, are stirred and mixed at 500-1000 rpm for 15-25 minutes to obtain the anti-floating slurry type two-component tile back adhesive.

[0033] As previously stated, a third aspect of the present invention provides an anti-floating slurry type two-component tile backing adhesive prepared by the method described in the second aspect above.

[0034] As previously stated, the fourth aspect of the present invention provides the application of the anti-floating slurry type two-component ceramic tile backing adhesive described in the third aspect in the field of building materials.

[0035] To provide a clearer understanding of the technical features, objectives, and beneficial effects of this invention, the invention is now described in detail through embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention, and the scope of protection of this invention is not limited to the following description. In the following examples, unless otherwise specified, all raw materials and reagents used are common commercially available products.

[0036] The following examples include some of the raw materials used and their sources: Vinyl acetate-vinyl tert-carbonate copolymer emulsion-I: solid content is 56wt%, glass transition temperature is 0℃, viscosity at 25℃ is 1000mPa·s, ethylene tert-carbonate structural unit content is 56wt%, grade is ROSF-9788, purchased from Guangzhou Rosef New Material Technology Co., Ltd. Vinyl acetate-vinyl tert-carbonate copolymer emulsion-II: solid content is 55%, glass transition temperature is 14℃, viscosity at 25℃ is 2000mPa·s, vinyl tert-carbonate structural unit content is 55%, grade is RS-2212F, purchased from Badifu Group Co., Ltd. Ethylene-vinyl acetate copolymer emulsion-I: solid content is 54.5 wt%, glass transition temperature is -2 °C, viscosity at 25 °C is 1300 mPa·s, ethylene structural unit content is 56 wt%, grade is VINNAPAS® 547ED, purchased from Wacker Chemie. Ethylene-vinyl acetate copolymer emulsion-II: solid content is 55wt%, glass transition temperature is -2℃, viscosity at 25℃ is 1000mPa·s, ethylene structural unit content is 33wt%, grade 707 emulsion, purchased from Sichuan Weihua Chemical Co., Ltd. Bentonite: Purchased from Shandong Yurun Chemical Co., Ltd.; Defoamer: Organosilicon defoamer, brand name DA480, purchased from Guangdong Kefeng Chemical Co., Ltd.; Dispersant: Sodium salt dispersant, brand name 5040C, purchased from Baolijia Chemical Co., Ltd.; Preservative: Kathon preservative, brand name IT3MV, purchased from Lanxess Chemical Company; Cement: Silicate cement, strength grade 42.5R, purchased from Conch Cement Company; Sand: Quartz sand, with an average particle diameter of 150μm, purchased from Zhaoyi Building Materials Co., Ltd. Hemihydrate phosphogypsum: purchased from Hubei Xinyangfeng New Building Materials Technology Co., Ltd.; Hemihydrate gypsum: Grade GY-01, industrial grade, purchased from Hubei Longyuan Gypsum Group Co., Ltd.; Cellulose: Hydroxyethyl cellulose (HEC), brand name BK50, purchased from Samsung Fine Chemicals Co., Ltd., South Korea; Gypsum Component-I: A combination of quicklime and hemihydrate phosphogypsum in a mass ratio of 1:5; Gypsum Component-II: A combination of quicklime and hemihydrate phosphogypsum in a mass ratio of 1:2; Gypsum Component-III: A combination of quicklime and hemihydrate gypsum in a mass ratio of 1:5; Preparation of composite water-absorbing resin: (1) Add 539 parts by weight of water and 100 parts by weight of sweet potato starch to a reaction vessel and gelatinize at 80°C and 600 rpm for 1 hour to obtain intermediate I; (2) Cool the above intermediate I to 65°C, add 300 parts by weight of acrylic acid, and stir for 30 min; keep the temperature constant, add 50 parts by weight of bentonite and 1 part by weight of ammonium persulfate, stir and disperse for 30 min to obtain intermediate II; (3) Keep the temperature at 65°C, add 10 parts by weight of N,N'-methylenebisacrylamide to the above intermediate II, and react for 3.5 h; after the reaction is completed, let stand for 24 h, take the supernatant, and dry it at 65°C to obtain the composite water-absorbing resin.

[0037] The amounts of components used in each example of the present invention are expressed in parts by weight, and unless otherwise specified, each part by weight is 100g.

[0038] Example 1 S1. Add water, vinyl acetate-vinyl tert-carbonate copolymer emulsion, ethylene-vinyl acetate copolymer emulsion, defoamer, dispersant and preservative to a stirred tank and stir at 600 rpm for 15 min to obtain a liquid. S2. Mix cement, sand, quicklime, hemihydrate phosphogypsum, composite water-absorbing resin and cellulose, and stir at 1000 rpm for 30 minutes to obtain powder. S3. The liquid and powder in a mass ratio of 1:3 are stirred and mixed at 1000 rpm for 20 minutes to obtain an anti-floating slurry type two-component tile back adhesive.

[0039] Unless otherwise specified, Examples 2 and 3 are carried out with reference to the method of Example 1. The difference is that the types and amounts of raw materials used in the examples are not exactly the same, as detailed in Table 1.

[0040] Table 1

[0041] Example 4 The same method as in Example 1 was used, except that an equal part by weight of vinyl acetate-vinyl carbonate copolymer emulsion-II was used to replace vinyl acetate-vinyl carbonate copolymer emulsion-I in component A to obtain an anti-floating slurry type two-component tile back adhesive.

[0042] Example 5 The same method as in Example 1 was used, except that an equal part by weight of ethylene-vinyl acetate copolymer emulsion-II was used to replace ethylene-vinyl acetate copolymer emulsion-I in component A to obtain an anti-floating slurry type two-component tile back adhesive.

[0043] Comparative Example 1 The same method as in Example 1 was used, except that an equal weight of gypsum component-II was used to replace gypsum component-I in component B to obtain an anti-floating slurry type two-component tile back adhesive.

[0044] Comparative Example 2 The same method as in Example 1 was used, except that an equal part by weight of hemihydrate phosphogypsum was used to replace gypsum component I in component B to obtain an anti-floating slurry type two-component tile back adhesive.

[0045] Comparative Example 3 The same method as in Example 1 was used, except that the amount of gypsum component-I in component B was adjusted to 0, and the amount of cement was adjusted to 510 parts by weight to obtain an anti-floating slurry type two-component tile back adhesive.

[0046] Comparative Example 4 The same method as in Example 1 was used, except that the amount of ethylene-vinyl acetate copolymer emulsion-I in component A was adjusted to 0, and the amount of vinyl acetate-vinyl tert-carbonate copolymer emulsion-I was adjusted to 350 parts by weight to obtain an anti-floating slurry type two-component tile back adhesive.

[0047] Comparative Example 5 The same method as in Example 1 was used, except that the amount of vinyl acetate-vinyl tert-carbonate copolymer emulsion-I in component A was adjusted to 150 parts by weight, and the amount of ethylene-vinyl acetate copolymer emulsion-I was adjusted to 200 parts by weight, to obtain an anti-floating slurry type two-component tile back adhesive.

[0048] Comparative Example 6 The same method as in Example 1 was used, except that an equal weight of gypsum component-III was used to replace gypsum component-I in component B to obtain an anti-floating slurry type two-component tile back adhesive.

[0049] Test case 1. Tensile bond strength test The tensile bond strength of the above-prepared anti-floating slurry type two-component ceramic tile backing adhesive was tested according to the JC / T 907-2018 test standard. The specific test results are shown in Table 2.

[0050] Table 2

[0051] 2. Anti-floating slurry performance test The static observation method, combined with the thickness of the slurry layer, bleeding rate, and stratification grade, is used to comprehensively evaluate the product's anti-slurry performance. Specific test methods include: The two-component tile adhesive obtained in the above examples was slowly poured into transparent test molds, with a uniform filling height of 80 mm. The surface was smoothed and vibrated without vibration. The molds were then left to stand at room temperature in a sealed environment for 30 minutes to avoid air movement and dust contamination. After standing, the thickness of the surface slurry was measured using vernier calipers, and the surface free water was extracted to calculate the bleeding rate.

[0052] The anti-floating slurry score ranges from 1.0 to 5.0, with higher scores indicating better anti-floating slurry performance. Rating and grading: 4.0~5.0 points, no laitance or stratification, grade is excellent; 3.0~3.9 points, slight floating slurry, grade is good; 2.0~2.9 points, obvious floating slurry, grade is average; 1.0~1.9 points, severe stratified oozing, grade poor.

[0053] The specific results are shown in Table 3.

[0054] Table 3

[0055] The test results above show that the anti-floating slurry type two-component tile adhesive provided by the present invention has superior bonding strength and mechanical properties. It can maintain high tensile bond strength under conditions of water immersion, heat treatment, freeze-thaw cycles, alkali corrosion, and long-term drying, demonstrating outstanding environmental adaptability and durability. At the same time, in the anti-floating slurry performance test, the anti-floating slurry type two-component tile adhesive provided by the present invention exhibits less slurry, lower bleeding rate, and no obvious stratification and segregation, indicating that it has significantly superior anti-floating slurry performance.

[0056] The preferred embodiments of the present invention have been described in detail above; however, the present invention is not limited thereto. Within the scope of the inventive concept, various simple modifications can be made to the technical solutions of the present invention, including combinations of various technical features in any other suitable manner. These simple modifications and combinations should also be considered as the content disclosed in the present invention and are all within the protection scope of the present invention.

Claims

1. A two-component composition for anti-floating adhesive for ceramic tile backing, characterized in that, The composition consists of component A and component B in a mass ratio of 1:2.5-3.5; The A component consists of a first main agent and a first auxiliary agent, wherein the first main agent is a vinyl acetate-vinyl tert-carbonate copolymer emulsion and an ethylene-vinyl acetate copolymer emulsion with a content-to-mass ratio of 1-1.5:1; In component A, the solid content of the vinyl acetate-vinyl tert-carbonate copolymer emulsion is 55-60 wt%; the solid content of the ethylene-vinyl acetate copolymer emulsion is 50-55 wt%. Component B consists of a second main agent and a second auxiliary agent. The second main agent includes cement, sand, gypsum components and composite water-absorbing resin. The gypsum components are a combination of quicklime and hemihydrate phosphogypsum in a mass ratio of 1:4-6. Based on the total mass of component B, the content of cement is 40-50 wt%, the content of sand is 40-50 wt%, the content of gypsum component is 4-10 wt%, and the content of composite water-absorbing resin is 0.3-0.8 wt%.

2. The composition according to claim 1, wherein, In component A, the glass transition temperature of the vinyl acetate-vinyl tert-carbonate copolymer emulsion is 0°C to 10°C, and the viscosity at 25°C is 500-1500 mPa·s. And / or, the glass transition temperature of the ethylene-vinyl acetate copolymer emulsion is -10°C to 0°C, and the viscosity at 25°C is 300-1500 mPa·s; And / or, the content of ethylene tert-carbonate structural units in the vinyl acetate-ethylene tert-carbonate copolymer emulsion is 55-57 wt%; the content of ethylene structural units in the ethylene-vinyl acetate copolymer emulsion is 55-57 wt%.

3. The composition according to claim 1, wherein, In component A, based on the total mass of component A, the content of the vinyl acetate-vinyl tert-carbonate copolymer emulsion is 15-25 wt%, and the content of the ethylene-vinyl acetate copolymer emulsion is 12-18 wt%.

4. The composition according to claim 1, wherein, In component B, the composite water-absorbing resin is prepared by a method comprising the following steps: (1) In the presence of water, starch is gelatinized to obtain intermediate I; (2) The intermediate I is mixed with acrylic acid, bentonite and an initiator to obtain intermediate II; (3) The intermediate II is mixed with N,N'-methylenebisacrylamide to obtain the composite water-absorbing resin; The mass ratio of the starch, water, acrylic acid, bentonite, initiator and N,N'-methylenebisacrylamide is 1:5-6:2.5-3.5:0.4-0.6:0.008-0.012:0.08-0.

12.

5. The composition according to claim 4, wherein, In step (1), the conditions for the gelatinization treatment include: a temperature of 70-90℃ and a time of 0.5-1.5h; And / or, in step (2), the initiator is selected from at least one of ammonium persulfate, potassium persulfate, and sodium persulfate; And / or, the conditions for the first mixture and the second mixture each independently include: a temperature of 60-70°C and a time of 1-4 hours.

6. The composition according to any one of claims 1-5, wherein, In component A, the first additive contains water, defoamer, dispersant and preservative; Based on the total mass of component A, the water content is 50-75 wt%, the defoamer content is 0.1-0.3 wt%, the dispersant content is 0.2-0.4 wt%, and the preservative content is 0.1-0.3 wt%. And / or, in component B, the second adjuvant contains 0.1-0.3 wt% cellulose based on the total mass of component B.

7. A method for preparing an anti-floating slurry type two-component ceramic tile backing adhesive, characterized in that, This method is performed using any of the components in the composition according to any one of claims 1-6, and the method includes: 1) Preparation of liquid and powder formulations The preparation method of the liquid agent includes: bringing a first main agent and a first auxiliary agent into a first contact to obtain the liquid agent; The method for preparing the powder includes: subjecting the second main agent and the second auxiliary agent to a second contact to obtain the powder; 2) The liquid and the powder are brought into a third contact at a mass ratio of 1:2.5-3.5 to obtain the anti-floating slurry type two-component ceramic tile back adhesive.

8. The method according to claim 7, wherein, The conditions for the first contact, the second contact, and the third contact each independently include: a rotational speed of 500-1000 rpm and a time of 15-60 min.

9. The anti-floating slurry type two-component tile backing adhesive prepared by the method of claim 7 or 8.

10. The application of the anti-floating slurry type two-component ceramic tile backing adhesive as described in claim 9 in the field of building materials.

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