Highly viscous waterproof coating, its preparation method and application

Abstract

This invention relates to the field of waterproof coating technology and proposes a high-viscosity waterproof coating comprising the following raw materials in parts by weight: 21-27 parts of styrene-acrylic emulsion, 12-18 parts of pure acrylic emulsion, 18-22 parts of emulsified asphalt, 0.2-0.4 parts of defoamer, 0.1-0.3 parts of dispersant, 0.12-0.36 parts of multifunctional additive, 0.2-0.4 parts of titanium dioxide, 13-17 parts of barium sulfate, 13-17 parts of calcium carbonate, 0.2-0.4 parts of thickener, 0.05-0.15 parts of bactericide, 0.1-0.3 parts of colorant, and 80-90 parts of water; the multifunctional additive is composed of 3-aminopropyltrimethoxysilane and 2-amino-4-fluoro-3-hydroxypyridine. This technical solution solves the problems of easy water permeability and low adhesion strength in related waterproof coatings.

Description

Technical Field

[0001] This invention relates to the field of waterproof coating technology, specifically to a high-viscosity waterproof coating, its preparation method, and its application. Background Technology

[0002] Waterproof coatings are coatings that form a waterproof layer on the surface of buildings. They can be used on various building structures, such as roofs, walls, and floors, to provide protective waterproofing. If the waterproof coating has poor permeability, moisture can accumulate inside the building, causing dampness and damage to walls, floors, and roofs, increasing the risk to the building structure. Furthermore, some waterproof coatings experience peeling, flaking, or cracking after long-term use due to low adhesive strength and weakened adhesion to the substrate, allowing moisture to penetrate the building and increasing the risk of dampness and leakage. Therefore, developing a waterproof coating with high impermeability and high adhesive strength is a pressing issue that needs to be addressed. Summary of the Invention

[0003] This invention proposes a high-viscosity waterproof coating, its preparation method, and its application, which solves the problems of easy water permeability and low bonding strength of waterproof coatings in related technologies.

[0004] The technical solution of this invention is as follows: This invention proposes a high-viscosity waterproof coating, comprising the following raw materials in parts by weight: 21-27 parts of styrene-acrylic emulsion, 12-18 parts of pure acrylic emulsion, 18-22 parts of emulsified asphalt, 0.2-0.4 parts of defoamer, 0.1-0.3 parts of dispersant, 0.12-0.32 parts of multifunctional additive, 0.2-0.4 parts of titanium dioxide, 13-17 parts of barium sulfate, 13-17 parts of calcium carbonate, 0.2-0.4 parts of thickener, 0.05-0.15 parts of bactericide, 0.1-0.3 parts of color paste, and 80-90 parts of water;

[0005] The multifunctional additive is composed of 3-aminopropyltrimethoxysilane and 2-amino-4-fluoro-3-hydroxypyridine.

[0006] As a further technical solution, the mass ratio of 3-aminopropyltrimethoxysilane to 2-amino-4-fluoro-3-hydroxypyridine is 2:1~3.

[0007] As a further technical solution, the mass ratio of 3-aminopropyltrimethoxysilane to 2-amino-4-fluoro-3-hydroxypyridine is 1:1.

[0008] As a further technical solution, the styrene-acrylic emulsion is composed of a first styrene-acrylic emulsion and a second styrene-acrylic emulsion, and the first styrene-acrylic emulsion and the second styrene-acrylic emulsion have different viscosities.

[0009] As a further technical solution, the viscosity of the first styrene-acrylic emulsion is less than that of the second styrene-acrylic emulsion, the viscosity of the first styrene-acrylic emulsion is 1000 cP, the viscosity of the second styrene-acrylic emulsion is 5000 cP, and the mass ratio of the first styrene-acrylic emulsion to the second styrene-acrylic emulsion is 1:2~4.

[0010] As a further technical solution, the mass ratio of the first styrene-acrylic emulsion to the second styrene-acrylic emulsion is 1:3.

[0011] The viscosity of styrene-acrylic emulsion reflects its fluidity and coagulation characteristics. When the viscosity of styrene-acrylic emulsion is high, it can promote better adhesion between solid particles and the substrate, thereby improving the bonding strength of the coating. However, if the viscosity is too high, it will cause particle deposition or aggregation, affecting the final coating's bonding strength and water resistance. Therefore, this invention obtains a waterproof coating with optimal water resistance and bonding strength by controlling the viscosity of styrene-acrylic emulsion.

[0012] As a further technical solution, the defoamer includes one or more of polydimethylsiloxane defoamer, polyether-modified silicone defoamer, and mineral oil defoamer.

[0013] As a further technical solution, the dispersant includes one or more of ethylene-acrylic acid copolymer, oxidized polyethylene wax, and fatty alcohol polyoxyethylene ether.

[0014] As a further technical solution, the thickener includes one or both of cellulose ether and polyacrylamide.

[0015] As a further technical solution, the bactericide includes one or two of bacterial bactericides and fungicides.

[0016] As a further technical solution, the color paste includes one or more of diketopyrrolopyrrole PR254, quinacridone PR122, and tetrachloroisoindolineone PY11.

[0017] The present invention also proposes a method for preparing a high-viscosity waterproof coating, comprising the following steps: weighing the raw materials and mixing them evenly to obtain the high-viscosity waterproof coating.

[0018] The working principle and beneficial effects of this invention are as follows:

[0019] In this invention, 3-aminopropyltrimethoxysilane and 2-amino-4-fluoro-3-hydroxypyridine are used as multifunctional additives. 3-aminopropyltrimethoxysilane can improve the adhesion of the coating by chemically bonding with the substrate surface, and its amino groups can combine with water molecules to form hydrogen bonds, improving the coating's water resistance. 2-Amino-4-fluoro-3-hydroxypyridine can reduce the polarity of the molecules, increase the hydrophobicity of the compound, thereby increasing surface tension, preventing liquid penetration, and improving the water resistance and adhesion strength of the waterproof coating. The addition of both 3-aminopropyltrimethoxysilane and 2-amino-4-fluoro-3-hydroxypyridine achieves multiple functions such as enhanced adhesion and improved waterproof performance, not only improving the overall performance of the coating but also effectively extending its service life, making it suitable for waterproof requirements in various harsh environments. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. 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 of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0021] In the following examples and comparative examples:

[0022] First styrene-acrylic emulsion: viscosity 1000 cP, model: Prymex DC-436, manufacturer: Dow Chemical (Shanghai) Co., Ltd.

[0023] Second styrene-acrylic emulsion: viscosity 5000 cP, model is Braymo DC-480, manufacturer is Dow Chemical (Shanghai) Co., Ltd.;

[0024] Pure acrylic emulsion: industrial grade, manufactured by Shandong Shengrun Chemical Co., Ltd.

[0025] Emulsified asphalt: Model H799, manufacturer is Beijing Herun Wantong Road Engineering Co., Ltd.;

[0026] Polydimethylsiloxane defoamer: liquid defoamer, manufactured by Dongguan Dafeng Food Chemical Co., Ltd.

[0027] Polyether-modified silicone defoamer: Industrial-grade alkali-resistant defoamer, manufactured by Guangdong Zhongke Hongtai New Materials Co., Ltd.

[0028] Mineral oil defoamer: Model B-638, manufactured by Guangdong Zhongke Hongtai New Materials Co., Ltd.

[0029] Bactericide: Triazine slow-release bactericide, model Biocide BK, manufactured by Shanghai Riqian Chemical Technology Co., Ltd.

[0030] Mold fungicide: Model ADM-F11, manufactured by Dongguan Aimer Anti-mold and Antibacterial Technology Co., Ltd.

[0031] Example 1

[0032] Weigh out 21 parts of the first styrene-acrylic emulsion, 12 parts of pure acrylic emulsion, 18 parts of emulsified asphalt, 0.2 parts of polydimethylsiloxane defoamer, 0.1 parts of ethylene-acrylic acid copolymer, 0.09 parts of 3-aminopropyltrimethoxysilane, 0.03 parts of 2-amino-4-fluoro-3-hydroxypyridine, 0.2 parts of titanium dioxide, 13 parts of barium sulfate, 13 parts of calcium carbonate, 0.2 parts of cellulose ether, 0.05 parts of bactericide, 0.1 parts of diketopyrrolopyrrole PR254, and 80 parts of water; mix them evenly to obtain the waterproof coating.

[0033] Example 2

[0034] Weigh out 25 parts of the first styrene-acrylic emulsion, 15 parts of pure acrylic emulsion, 20 parts of emulsified asphalt, 0.3 parts of polyether-modified silicone defoamer, 0.2 parts of oxidized polyethylene wax, 0.18 parts of 3-aminopropyltrimethoxysilane, 0.06 parts of 2-amino-4-fluoro-3-hydroxypyridine, 0.3 parts of titanium dioxide, 15 parts of barium sulfate, 15 parts of calcium carbonate, 0.3 parts of cellulose ether, 0.1 parts of bactericide, 0.2 parts of quinacrine PR122, and 85 parts of water; mix them evenly to obtain the waterproof coating.

[0035] Example 3

[0036] Weigh out 27 parts of the first styrene-acrylic emulsion, 18 parts of pure acrylic emulsion, 22 parts of emulsified asphalt, 0.4 parts of mineral oil defoamer, 0.3 parts of fatty alcohol polyoxyethylene ether, 0.27 parts of 3-aminopropyltrimethoxysilane, 0.09 parts of 2-amino-4-fluoro-3-hydroxypyridine, 0.4 parts of titanium dioxide, 17 parts of barium sulfate, 17 parts of calcium carbonate, 0.4 parts of polyacrylamide, 0.15 parts of fungicide, 0.3 parts of tetrachloroisoindolinone PY11, and 90 parts of water; mix them evenly to obtain the waterproof coating.

[0037] Example 4

[0038] Compared with Example 1, Example 4 differs in that 0.09 parts of 3-aminopropyltrimethoxysilane and 0.03 parts of 2-amino-4-fluoro-3-hydroxypyridine are replaced with 0.08 parts of 3-aminopropyltrimethoxysilane and 0.04 parts of 2-amino-4-fluoro-3-hydroxypyridine.

[0039] Example 5

[0040] Compared with Example 1, Example 5 differs in that 0.09 parts of 3-aminopropyltrimethoxysilane and 0.03 parts of 2-amino-4-fluoro-3-hydroxypyridine are replaced with 0.06 parts of 3-aminopropyltrimethoxysilane and 0.06 parts of 2-amino-4-fluoro-3-hydroxypyridine.

[0041] Example 6

[0042] Compared with Example 1, Example 6 differs in that 0.09 parts of 3-aminopropyltrimethoxysilane and 0.03 parts of 2-amino-4-fluoro-3-hydroxypyridine are replaced with 0.048 parts of 3-aminopropyltrimethoxysilane and 0.072 parts of 2-amino-4-fluoro-3-hydroxypyridine.

[0043] Example 7

[0044] Compared with Example 1, Example 7 differs in that 0.09 parts of 3-aminopropyltrimethoxysilane and 0.03 parts of 2-amino-4-fluoro-3-hydroxypyridine are replaced with 0.04 parts of 3-aminopropyltrimethoxysilane and 0.08 parts of 2-amino-4-fluoro-3-hydroxypyridine.

[0045] Example 8

[0046] The difference between Example 8 and Example 5 is that 21 parts of the first styrene-acrylic emulsion were replaced with an equal amount of the second styrene-acrylic emulsion.

[0047] Example 9

[0048] Compared with Example 8, Example 9 differs in that 21 parts of the second styrene-acrylic emulsion are replaced with 10.5 parts of the first styrene-acrylic emulsion and 10.5 parts of the second styrene-acrylic emulsion.

[0049] Example 10

[0050] Compared with Example 8, Example 10 differs in that 21 parts of the second styrene-acrylic emulsion are replaced with 7 parts of the first styrene-acrylic emulsion and 14 parts of the second styrene-acrylic emulsion.

[0051] Example 11

[0052] Compared with Example 8, Example 11 differs in that 21 parts of the second styrene-acrylic emulsion are replaced with 5.25 parts of the first styrene-acrylic emulsion and 15.75 parts of the second styrene-acrylic emulsion.

[0053] Example 12

[0054] Compared with Example 8, Example 12 differs in that 21 parts of the second styrene-acrylic emulsion are replaced with 4.2 parts of the first styrene-acrylic emulsion and 16.8 parts of the second styrene-acrylic emulsion.

[0055] Example 13

[0056] Compared with Example 8, Example 13 differs in that 21 parts of the second styrene-acrylic emulsion are replaced with 3.5 parts of the first styrene-acrylic emulsion and 17.5 parts of the second styrene-acrylic emulsion.

[0057] Comparative Example 1

[0058] Compared to Example 1, Comparative Example 1 only added 3-aminopropyltrimethoxysilane.

[0059] Comparative Example 2

[0060] Compared to Example 1, Comparative Example 2 only added 2-amino-4-fluoro-3-hydroxypyridine.

[0061] The high-viscosity waterproof coatings prepared in Examples 1-13 and Comparative Examples 1-2 were tested according to the following methods:

[0062] 1. Impermeability: The impermeability of the sample is tested according to the test method specified in JC / T 408-2005 "Water-emulsion type asphalt waterproof coating" Type H. The test pressure is 0.1MPa, and the longest time without water seepage is recorded.

[0063] 2. Adhesion strength: The adhesion strength of the sample shall be tested in accordance with the test method for adhesion strength specified in Type H of JC / T 408-2005 "Water-emulsion type asphalt waterproof coating".

[0064] The test results are shown in the table below:

[0065] Table 1 Performance test results of the high-viscosity waterproof coatings prepared in Examples 1-13 and Comparative Examples 1-2

[0066]

[0067] Compared with Comparative Examples 1 and 2, Example 1 simultaneously added 3-aminopropyltrimethoxysilane and 2-amino-4-fluoro-3-hydroxypyridine. As a result, the impermeability and adhesion strength of Example 1 were greater than those of Comparative Examples 1 and 2, indicating that 3-aminopropyltrimethoxysilane and 2-amino-4-fluoro-3-hydroxypyridine have a synergistic effect, which can enhance the impermeability and adhesion strength of the coating.

[0068] Compared with Example 1, Examples 4-7 added 3-aminopropyltrimethoxysilane and 2-amino-4-fluoro-3-hydroxypyridine in different mass ratios. The results showed that the impermeability and adhesive strength of Examples 4-6 were greater than those of Examples 1 and 7, indicating that when the mass ratio of 3-aminopropyltrimethoxysilane to 2-amino-4-fluoro-3-hydroxypyridine is 2:1 to 3, and preferably 1:1, the resulting coating has better impermeability and adhesive strength.

[0069] Compared with Examples 5 and 8, Examples 9 to 13 simultaneously added the first styrene-acrylic emulsion and the second styrene-acrylic emulsion. As a result, the impermeability and bonding strength of Examples 9 to 13 were greater than those of Examples 5 and 8, indicating that the first styrene-acrylic emulsion and the second styrene-acrylic emulsion played a synergistic role, which could further improve the impermeability and bonding strength of the coating.

[0070] Compared with Example 9, Examples 10-13 added different mass ratios of the first styrene-acrylic emulsion and the second styrene-acrylic emulsion. The results showed that the impermeability and adhesive strength of Examples 10-12 were greater than those of Examples 9 and 13. This indicates that when the mass ratio of the first styrene-acrylic emulsion to the second styrene-acrylic emulsion is 1:2 to 4, and preferably 1:3, the resulting coating has the best impermeability and adhesive strength.

[0071] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A high-tack water repellent coating, characterized by, The raw materials include the following components by weight: 21-27 parts styrene-acrylic emulsion, 12-18 parts pure acrylic emulsion, 18-22 parts emulsified asphalt, 0.2-0.4 parts defoamer, 0.1-0.3 parts dispersant, 0.12-0.36 parts multifunctional additive, 0.2-0.4 parts titanium dioxide, 13-17 parts barium sulfate, 13-17 parts calcium carbonate, 0.2-0.4 parts thickener, 0.05-0.15 parts bactericide, 0.1-0.3 parts color paste, and 80-90 parts water; the multifunctional additive is composed of 3-aminopropyltrimethoxysilane and 2-amino-4-fluoro-3-hydroxypyridine. The mass ratio of 3-aminopropyltrimethoxysilane to 2-amino-4-fluoro-3-hydroxypyridine is 2:1~3; The styrene-acrylic emulsion is composed of a first styrene-acrylic emulsion and a second styrene-acrylic emulsion, and the first styrene-acrylic emulsion and the second styrene-acrylic emulsion have different viscosities; The viscosity of the first styrene-acrylic emulsion is less than that of the second styrene-acrylic emulsion. The viscosity of the first styrene-acrylic emulsion is 1000 cP, and the viscosity of the second styrene-acrylic emulsion is 5000 cP. The mass ratio of the first styrene-acrylic emulsion to the second styrene-acrylic emulsion is 1:2~4.

2. The high-adhesion waterproof coating of claim 1, wherein, The defoamer includes one or more of polydimethylsiloxane defoamer, polyether-modified silicone defoamer, and mineral oil defoamer.

3. The high-viscosity waterproof coating according to claim 1, characterized in that, The dispersant includes one or more of ethylene-acrylic acid copolymer, oxidized polyethylene wax, and fatty alcohol polyoxyethylene ether.

4. The high-viscosity waterproof coating according to claim 1, characterized in that, The thickener includes one or both of cellulose ether and polyacrylamide.

5. The high-viscosity waterproof coating according to claim 1, characterized in that, The bactericide includes one or both of the following: bacterial bactericide and fungicide.

6. The high-viscosity waterproof coating according to claim 1, characterized in that, The color paste includes one or more of diketopyrrolopyrrole PR254, quinacridone PR122, and tetrachloroisoindolineone PY11.

7. A method for preparing a high-viscosity waterproof coating according to any one of claims 1 to 6, characterized in that, The process includes the following steps: weighing the raw materials and mixing them evenly to obtain a high-viscosity waterproof coating.

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