A multifunctional two-component interface adhesive and preparation method thereof

Abstract

The invention discloses a multifunctional two-component interface adhesive and a preparation method thereof. The interface adhesive comprises liquid material A and powder material B; liquid material A is composed of waterproof emulsion, high-toughness elastic emulsion, water-soluble silicate, defoamer, preservative and water, and powder material B is composed of ordinary cement, mineral powder, strength enhancer, polypropylene fiber, water retaining agent, water reducing agent and fine sand. The invention optimizes the formula, adopts compounding thickening of organic colloid and inorganic reaction thickening, and the obtained two-component interface adhesive not only has strong bonding force, but also has little change after treatment, and is not only suitable for the back of ceramic tiles, but also suitable for concrete interface treatment.

Description

Technical Field

[0001] The invention belongs to the field of adhesives, and particularly relates to a multifunctional two-component interface adhesive and a preparation method thereof. Background Art

[0002] Ceramic tiles with a water absorption rate of less than 0.5% are called vitrified tiles. Due to their low water absorption rate, vitrified tiles are the hardest type of tiles. They are not easy to scratch, are corrosion-resistant, and have strong stain resistance, thus having a wide range of applications. At present, the output of vitrified tiles is the largest among all types of tiles, but their construction is also relatively difficult. This is because vitrified tiles have poor adhesion due to their low water absorption rate, and are prone to hollowing and falling off. Therefore, a tile adhesive with strong adhesion is needed.

[0003] In addition, with the improvement of people's living standards, the frequency of decoration of living environment increases. When renovating the floor or wall with tiles, the traditional method is to remove the original tiles, which is not only labor-intensive and time-consuming, but also noisy and disturbing, and also has a certain damage effect on the wall. At present, people tend to attach new tiles on the original tiles. The surface of the original tiles is relatively smooth, which puts higher requirements on the tile adhesive. Summary of the invention

[0004] In order to overcome the shortcomings and deficiencies of the prior art, the primary purpose of the present invention is to provide a multifunctional two-component interface adhesive.

[0005] Another object of the present invention is to provide a method for preparing the multifunctional two-component interface adhesive.

[0006] Another object of the present invention is to provide an application of the multifunctional two-component interface adhesive.

[0007] The purpose of the present invention is achieved through the following technical solution: a multifunctional two-component interface adhesive, comprising a liquid material A and a powder material B;

[0008] Liquid material A is composed of the following components by mass percentage: 25% to 35% waterproof emulsion, 10% to 15% high-toughness elastic emulsion, 10% to 12% water-soluble silicate, 0.2% to 0.4% defoamer, 0.2% to 0.4% preservative, and the balance is water; preferably, it is composed of the following components by mass percentage: 25% to 35% waterproof emulsion, 10% to 15% high-toughness elastic emulsion, 10% to 12% water-soluble silicate, 0.3% defoamer, 0.3% preservative, and the balance is water;

[0009] Powder B is composed of the following ingredients in percentage by mass: 30% to 50% of ordinary cement, 15% to 25% of mineral powder, 0.6% to 1.0% of strength enhancer, 1.0% to 1.2% of polypropylene fiber, 0.1% to 0.3% of water retaining agent, 0.3% to 0.5% of water reducing agent, and the balance is fine sand; preferably, it is composed of the following ingredients in percentage by mass: 40% of ordinary cement, 20% of mineral powder, 0.6% to 1.0% of strength enhancer, 1.0% to 1.2% of polypropylene fiber, 0.1% of water retaining agent, 0.3% to 0.5% of water reducing agent, and 37.3% to 37.8% of fine sand.

[0010] The waterproof emulsion is preferably at least one of pure acrylic emulsion, silicone acrylic emulsion and styrene acrylic emulsion.

[0011] The high-toughness elastic emulsion is preferably an epoxy-modified acrylic emulsion; more preferably a nano-scale epoxy-modified acrylic emulsion.

[0012] The water-soluble silicate is preferably at least one of sodium silicate and potassium silicate.

[0013] The defoamer is preferably at least one of an organosilicon defoamer and a mineral oil defoamer.

[0014] The ordinary cement is preferably silicate cement; more preferably 42.5R silicate cement.

[0015] The mineral powder is preferably S95 mineral powder.

[0016] The fine sand is quartz sand; preferably quartz sand with a fineness modulus of 0.9.

[0017] The strength enhancer is preferably polyvinyl alcohol.

[0018] The polypropylene fiber is preferably a polypropylene fiber with a length of 3 to 6 mm.

[0019] The water retaining agent is preferably at least one of polyacrylamide, cellulose ether and magnesium aluminum silicate.

[0020] The cellulose ether is preferably hydroxypropyl methyl cellulose ether.

[0021] The water reducer is preferably at least one of a naphthalene-based high-efficiency water reducer and a polycarboxylic acid water reducer.

[0022] The preparation method of the multifunctional two-component interface adhesive comprises the following steps:

[0023] (1) uniformly mixing a waterproof emulsion, a high-toughness elastic emulsion, a water-soluble silicate, a defoaming agent, a preservative and water to obtain a liquid material A;

[0024] (2) Ordinary cement, mineral powder, strength enhancer, polypropylene fiber, water retaining agent, water reducing agent and fine sand are mixed uniformly to obtain powder B.

[0025] The application of the multifunctional two-component interface adhesive in tile pasting preferably includes the following steps: after the liquid material A and the powder material B are evenly mixed, they are rolled on the back of the tile with a roller or scraped thinly with a scraper to paste.

[0026] The liquid material A and the powder material B are preferably mixed in a mass ratio of 1:2.8 to 3.2; more preferably in a mass ratio of 1:3.

[0027] Compared with the prior art, the present invention has the following advantages and effects:

[0028] (1) The present invention uses waterproof emulsion as the main component and is compounded with high-toughness elastic emulsion for reinforcement. The compounded emulsion has certain flexibility and permeability, and forms a polymer network structure between the brick and the mortar layer, filling the gap caused by stress shrinkage during cement hydration. At the same time, it can also delay the loss of water to prevent the cement from being incompletely hydrated and having low strength due to excessive water loss of the material.

[0029] (2) The present invention uses water-soluble silicate, and the water-soluble silicate reacts with cement to increase the bonding strength.

[0030] (3) The present invention uses quartz sand with a fineness modulus of 0.9, in which the quartz sand plays the role of a skeleton. A reasonable fineness modulus can not only improve the uniformity of the slurry after the cement and sand are mixed, and the area of ​​the cement slurry, but also optimize the density and strength of the mortar.

[0031] (4) The present invention adopts the organic composite of polyvinyl alcohol (PVA) and polypropylene fiber to further enhance the viscosity of the back adhesive and reduce the variation range of the viscosity after treatment.

[0032] In summary, the present invention optimizes the formula and adopts organic colloid compounding and inorganic reaction to increase viscosity. The obtained two-component interface adhesive not only has strong adhesion but also does not change much after treatment. It is not only suitable for the back of tiles, but also for concrete interface treatment. DETAILED DESCRIPTION

[0033] For a better understanding of the present invention, the content of the present invention is further explained below in conjunction with the embodiments, but the content of the present invention is not limited to the following embodiments.

[0034] Examples 1 to 3 and Comparative Examples 1 to 8

[0035] The specific amounts of the substances used are shown in Table 1.

[0036] Among them, the silicone acrylic emulsion is Baoliga BLJ-998AD; the epoxy modified acrylic emulsion is Henghe Yongsheng LR-8282; the acrylic emulsion is Baoliga BLJ-963F; the defoamer is Defeng mineral oil defoamer DF-2756; the preservative is Dow bactericidal preservative LX 150; the ordinary cement is Conch ordinary silicate PO 42.5R; the polyvinyl alcohol PVA is Changchun's BP24; the cellulose ether is Langfang Feitai hydroxypropyl methylcellulose ether, 100,000 viscosity; the polypropylene fiber is Langfang Feitai 6mm PP fiber; the water reducer is Ruihongde polycarboxylic acid series high-efficiency water reducer.

[0037] Table 1 Examples 1 to 3 Formula

[0038]

[0039]

[0040] Table 2 Comparative Examples 1 to 3 Formulations

[0041]

[0042] Preparation process of two-component interface adhesive:

[0043] (1) mixing the components in liquid material A uniformly to obtain liquid material A;

[0044] (2) mixing the components in powder B uniformly to obtain powder B;

[0045] (3) Mix liquid material A and powder material B in a mass ratio of 1:3 and stir evenly to obtain a two-component interface adhesive.

[0046] Effect Example

[0047] (1) Using AIa extruded ceramic tiles (water absorption of 0.1% to 0.5% as measured by boiling method), with a surface size of (50±1) mm×(50±1) mm, and meeting the requirements of JC / T 547-2017 Ceramic Tile Adhesives, the prepared two-component interface adhesive was rolled on the back of the tile with a roller or scraped with a scraper. After the adhesive was completely dry, JC / T 547-2017C1 grade tile adhesive was applied. Curing was carried out according to the standard conditions of JC / T 547-2017 Ceramic Tile Adhesives. The performance of Examples 1 to 3, Comparative Examples 1 to 8, and two popular two-component tile adhesives on the market were tested.

[0048] (2) Ordinary Portland cement with a strength grade of not less than 42.5 that meets the requirements of GB 175 and medium sand that meets the requirements of GB / T 14684-2011 are used. Cement, sand and water are prepared in a mass ratio of 1:2.5:0.45 and mixed evenly. After that, they are cast into several cement mortar specimens of two sizes, 40mm×40mm×10mm and 70mm×70mm×20mm, using a mold that is easy to disassemble. After that, they are placed under standard test conditions for 24 hours, the molds are removed, and they are immersed in water at (23±2)℃ for 6 days. Then, the mortar specimens that have been placed under standard test conditions for more than 21 days are taken out and the performance is tested according to the test method of JC / T 907-2018 "Concrete Interface Treatment Agent".

[0049] The test results are shown in Tables 3 and 4.

[0050] Table 3 Performance test results based on JC / T 547-2017 are as follows

[0051]

[0052]

[0053] Table 4 Performance test results based on JC / T 907-2018 are as follows

[0054]

[0055] It can be seen from the performance test data in Tables 1 and 2 that the multifunctional two-component interface adhesive provided by the present invention not only has excellent aging resistance and water resistance, but also has better comprehensive performance than the commonly used tile adhesives on the market, reflecting that the present invention is not only suitable for the back of tiles, but also suitable for concrete interface treatment.

[0056] The above embodiments are preferred implementation modes of the present invention, but the implementation modes of the present invention are not limited to the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present invention should be equivalent replacement methods and are included in the protection scope of the present invention.

Claims

1. A multifunctional two-component interface adhesive, characterized in that: Including liquid material A and powder material B; Liquid material A is composed of the following components by mass percentage: 25% to 35% waterproof emulsion, 10% to 15% high-toughness elastic emulsion, 10% to 12% water-soluble silicate, 0.2% to 0.4% defoaming agent, 0.2% to 0.4% preservative, and the balance is water; Powder B is composed of the following ingredients in percentage by mass: 30% to 50% of ordinary cement, 15% to 25% of mineral powder, 0.6% to 1.0% of strength enhancer, 1.0% to 1.2% of polypropylene fiber, 0.1% to 0.3% of water retaining agent, 0.3% to 0.5% of water reducing agent, and the balance is fine sand; The waterproof emulsion is a silicone-acrylic emulsion; The high-toughness elastic emulsion is an epoxy-modified acrylic emulsion; The water-soluble silicate is at least one of sodium silicate and potassium silicate; The fine sand is quartz sand with a fineness modulus of 0.9; The strength enhancer is polyvinyl alcohol.

2. The multifunctional two-component interface adhesive as claimed in claim 1, characterized in that: The liquid material A is composed of the following components by mass percentage: 25% to 35% waterproof emulsion, 10% to 15% high-toughness elastic emulsion, 10% to 12% water-soluble silicate, 0.3% defoaming agent, 0.3% preservative, and the balance is water.

3. The multifunctional two-component interface adhesive as claimed in claim 1, characterized in that: The powder B is composed of the following components in percentage by mass: 40% of ordinary cement, 20% of mineral powder, 0.6% to 1.0% of strength enhancer, 1.0% to 1.2% of polypropylene fiber, 0.1% of water retaining agent, 0.3% to 0.5% of water reducing agent, and 37.3% to 37.8% of fine sand.

4. The multifunctional two-component interface adhesive according to any one of claims 1 to 3, characterized in that: The mineral powder is S95 mineral powder; The polypropylene fiber is a polypropylene fiber with a length of 3 to 6 mm.

5. The multifunctional two-component interface adhesive according to any one of claims 1 to 3, characterized in that: The defoamer is at least one of an organosilicon defoamer and a mineral oil defoamer; The ordinary cement is silicate cement; The water retaining agent is at least one of polyacrylamide, cellulose ether and magnesium aluminum silicate; The water reducer is at least one of a naphthalene-based high-efficiency water reducer and a polycarboxylic acid water reducer.

6. The method for preparing the multifunctional two-component interface adhesive according to any one of claims 1 to 5, characterized in that The steps include: (1) uniformly mixing a waterproof emulsion, a high-toughness elastic emulsion, a water-soluble silicate, a defoaming agent, a preservative and water to obtain a liquid material A; (2) Mix ordinary cement, mineral powder, strength enhancer, polypropylene fiber, water retaining agent, water reducing agent and fine sand to obtain powder B.

7. Use of the multifunctional two-component interface adhesive according to any one of claims 1 to 5 in tile pasting.

8. The use of the multifunctional two-component interface adhesive in tile pasting as claimed in claim 7, characterized in that The method comprises the following steps: after the liquid material A and the powder material B are evenly mixed, the mixture is rolled on the back of the tile with a roller or thinly scraped on the back of the tile with a scraper for pasting.

9. The use of the multifunctional two-component interface adhesive as claimed in claim 8 in tile pasting, characterized in that: The liquid material A and the powder material B are mixed in a mass ratio of 1:2.8-3.2.

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