Waterproof paint, preparation method thereof and waterproof coating

Abstract

The invention discloses a waterproof coating, a preparation method thereof and a waterproof coating. The waterproof coating comprises a raw material component A and a raw material component B, wherein the mass ratio of the raw material component A to the raw material component B is (1: 1.5)-(1: 1.8); the raw material component A comprises a polymer emulsion, an additive and a solvent; the raw material component B comprises the following components in parts by weight: 320-350 parts of Portland cement; 40 to 50 parts of calcium aluminate cement; 30 to 40 parts of rare earth modified illite mineral powder; 500 to 600 parts of a filling material; wherein the rare earth modified illite mineral powder comprises illite mineral powder and a rare earth modified material, and the mass ratio of the illite mineral powder to the rare earth modified material is (4: 1)-(5: 1). The waterproof coating provided by the invention has a higher powder-to-liquid ratio, does not crack when being thickly coated, and does not turn white.

Description

Technical Field

[0001] The present application belongs to the technical field of waterproof materials, and in particular relates to a waterproof coating and a preparation method thereof, and a waterproof coating. Background Art

[0002] Polymer cement-based waterproof coatings (JS waterproof coatings) are environmentally friendly, offer stable performance, excellent aging resistance, and a long waterproof life. They are also safe, easy to apply, and simple to operate, allowing them to be applied directly to damp surfaces without visible water. They are primarily used for pre-treatment waterproofing in kitchens and bathrooms, tiled roofs, building exteriors, basements, and pools. JS waterproof coatings comply with the national standard GBT 23445-2009, "Polymer Cement Waterproof Coatings." This standard categorizes products into three categories: I, II, and III, based on their physical properties. Type II is the most widely used.

[0003] However, in actual applications, JS waterproof coatings have problems such as cracking when applied thickly, whitening of the coating, and not drying. Summary of the Invention

[0004] The embodiments of the present application provide a waterproof coating, a preparation method thereof, and a waterproof coating. The waterproof coating of the present application has a higher powder-liquid ratio, does not crack when applied thickly, and the coating does not turn white.

[0005] In a first aspect, an embodiment of the present application provides a waterproof coating, comprising a raw material component A and a raw material component B, wherein the mass ratio of raw material component A to raw material component B is 1:1.5 to 1:1.8; raw material component A comprises a polymer emulsion, an additive, and a solvent; raw material component B comprises the following components in parts by weight: 320 parts to 350 parts of Portland cement;

[0006] Calcium aluminate cement, 40 to 50 parts; rare earth modified illite ore powder, 30 to 40 parts; filler, 500 to 600 parts; wherein the rare earth modified illite ore powder includes illite ore powder and rare earth modified material, and the mass ratio of illite ore powder to rare earth modified material is 4:1 to 5:1.

[0007] According to the embodiments of the present application, the waterproof coating of the present application uses rare earth modified illite mineral powder as a polymer cement waterproof coating of the reinforcement system. The natural particle size of illite powder is small and the dispersibility in the polymer phase is good. These all make the compatibility of illite powder with the coating system better than other powder fillers. The better compatibility makes it hinder the movement of macromolecular chains (i.e., internal friction) at a lower level, thereby achieving the effect of strengthening and toughening. The introduction of rare earths changes the structure of the polymer material. Specifically, the illite lamellae have a higher charge density, so that the illite can adsorb rare earth elements in a hydrated environment. Rare earth elements are adsorbed on the surface of the illite or enter its interlayers. The introduction of rare earth elements changes the charge between the illite lamellae, thereby changing the binding force, so that the illite and the polymer material form a better reinforcement effect, further causing the polymer material to form a structural change. In addition, the rare earth modified material has a catalytic effect on the curing reaction of inorganic gel materials such as cement, further promoting its hydration. At the same time, the waterproof coating has a high powder-to-liquid ratio, which further reduces costs while ensuring properties such as no cracking when applied thickly.

[0008] In addition, the inorganic components in the waterproof coating of the present application adopt an inorganic gelling system mainly composed of ordinary Portland cement and calcium aluminate cement. By using calcium aluminate cement in combination, the cracking resistance and whitening resistance of the coating film are effectively improved. The use of calcium aluminate as a gelling material can effectively reduce or avoid the later alkali efflorescence of the waterproof coating since the hydration product of calcium aluminate cement does not produce free Ca(OH)2, thereby solving the problem of later alkali efflorescence and whitening.

[0009] In a first possible implementation, the rare earth modifying material includes one or more elements of scandium, yttrium and lanthanide elements. Preferably, the rare earth modifying material includes one or more elements of lanthanum, cerium, neodymium, samarium, yttrium and gadolinium.

[0010] Combined with the above possible implementation methods, the specific surface area of ​​illite ore powder is 65m 2 / g~100m 2 / g; and / or, the particle size of the illite ore powder is 150 mesh to 200 mesh.

[0011] In combination with the above possible implementation methods, the filler includes calcium carbonate and / or S95 mineral powder, optionally, the calcium carbonate is heavy calcium carbonate with a mesh size of 150 to 200; and / or the mass ratio of raw material component A to raw material component B is 1:1.7 to 1:1.8.

[0012] In combination with the above possible implementation methods, the B raw material component may further include 5 to 8 parts of calcium sulfate by weight; and / or, the B raw material component may further include 2 to 3 parts of a water reducer by weight. Preferably, the water reducer is a melamine water reducer.

[0013] In this implementation, calcium sulfate and calcium aluminate cement in the waterproof coating of this application react to form ettringite. The hydration product, ettringite, exhibits rapid formation, high water binding capacity, and shrinkage compensation capabilities. The rapid formation of ettringite shortens the setting time of the waterproof coating system, improves the early strength of the waterproof coating, and reduces shrinkage, thereby addressing cracking issues in the waterproof coating.

[0014] In combination with the above possible implementation methods, the raw material component A includes, by weight: acrylic emulsion, 700 parts to 730 parts; chloroprene emulsion, 80 parts to 100 parts; water-based polyurethane emulsion, 70 parts to 80 parts; plasticizer, 35 parts to 40 parts; preservative, 2 parts to 3 parts; defoaming agent, 2 parts to 3 parts; dispersant, 3 parts to 4 parts, preferably sodium salt dispersant; solvent, 44 parts to 106 parts, preferably water; alkali swelling thickener, 2 parts to 3 parts.

[0015] In the above possible implementations, the waterproof coating meets at least one of the following requirements: (1) the solid content of the acrylic emulsion is 50% to 60%, the minimum film-forming temperature (MFT) is -5°C to 8°C, and the glass transition temperature (Tg) is -12°C to -8°C; (2) the solid content of the chloroprene emulsion is 55% to 65%, the minimum film-forming temperature (MFT) is 5°C to 8°C, and the glass transition temperature (Tg) is -10°C to -20°C; (3) the solid content of the aqueous polyurethane emulsion is 50% to 55%, the minimum film-forming temperature (MFT) is 5°C to 8°C, and the glass transition temperature (Tg) is -15°C to -10°C.

[0016] In a second aspect, an embodiment of the present application provides a method for preparing a waterproof coating, comprising: doping and modifying illite ore powder and rare earth modified material in a mass ratio of 4:1 to 5:1 to obtain rare earth modified illite ore powder, and the doping and modification time is 5 minutes to 10 minutes; stirring and mixing 320 parts to 350 parts of silicate cement, 40 parts to 50 parts of calcium aluminate cement, 30 parts to 40 parts of rare earth modified illite ore powder and 500 parts to 600 parts of filler to obtain raw material component B, and the stirring and mixing time is 15 minutes to 20 minutes; stirring and mixing a polymer emulsion, an additive and a solvent to obtain raw material component A; mixing raw material component A and raw material component B in a mass ratio of 1:1.5 to 1:1.8 to obtain a waterproof coating.

[0017] In a first possible implementation, 320 to 350 parts of Portland cement, 40 to 50 parts of calcium aluminate cement, 30 to 40 parts of rare earth modified illite powder, and 500 to 600 parts of filler are stirred and mixed to obtain the raw material component B. Before stirring and mixing, 5 to 8 parts of calcium sulfate and / or 2 to 3 parts of a water reducer can also be added; and / or, the raw material component A is obtained by the following method: 700 to 730 parts of acrylic emulsion, 80 to 100 parts of chloroprene emulsion, 70 to 80 parts of water A polyurethane emulsion, 35 to 40 parts of a plasticizer and part of a solvent are stirred and mixed at a speed of 600 r / min to 1000 r / min to obtain a first mixture; 2 to 3 parts of a defoamer and 2 to 3 parts of a preservative are added to the first mixture and stirred for 5 to 10 minutes to obtain a second mixture; 2 to 3 parts of an alkali-swellable thickener are mixed and diluted with the remaining solvent and then added to the second mixture, stirred for 15 to 20 minutes and then filtered to obtain a raw material component A. Preferably, the mixing and dilution ratio is 3 to 4 times.

[0018] In a third aspect, embodiments of the present application provide a waterproof coating prepared using the waterproof coating of the first aspect and / or the waterproof coating prepared using the preparation method of the second aspect. Preferably, the waterproof coating has a thickness of 1.5 mm to 4 mm. Compared to existing waterproof coatings, the waterproof coating of the present application can be thicker without cracking or whitening. DETAILED DESCRIPTION

[0019] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present application, rather than to limit the present application. For those skilled in the art, the present application can be implemented without the need for some of these specific details. The following description of the embodiments is merely to provide a better understanding of the present application by illustrating the examples of the present application.

[0020] For simplicity, this application only explicitly discloses certain numerical ranges. However, any lower limit may be combined with any upper limit to form an unspecified range; and any lower limit may be combined with other lower limits to form an unspecified range, and similarly, any upper limit may be combined with any other upper limit to form an unspecified range. In addition, although not explicitly stated, each point or individual value between the endpoints of a range is included in the range. Thus, each point or individual value may serve as its own lower limit or upper limit and be combined with any other point or individual value, or with other lower limits or upper limits, to form an unspecified range.

[0021] The above invention content of this application is not intended to describe every disclosed embodiment or every implementation in this application. The following description illustrates exemplary embodiments in more detail. In many places throughout the application, guidance is provided through a series of examples, which can be used in various combinations. In each example, the enumeration is only as a representative group and should not be interpreted as exhaustive. In addition, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0022] It should be noted that, unless there is any conflict, the embodiments and features in the embodiments of this application can be combined with each other.

[0023] In this document, the term "and / or" simply describes a relationship between related objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Furthermore, the character " / " in this document generally indicates that the related objects are in an "or" relationship.

[0024] It should be understood that in the embodiments of the present application, "B corresponding to A" means that B is associated with A and B can be determined based on A. However, it should also be understood that determining B based on A does not mean determining B based solely on A, but B can also be determined based on A and / or other information.

[0025] According to a survey on waterproofing material applications conducted by China Building Waterproofing magazine, polymer cement-based waterproof coatings have seen significant usage in recent years, ranking among the top 10 most widely used waterproofing materials. The survey also revealed that polymer cement-based waterproof coatings are used in a wide range of project types and locations, including basement floors, basement walls, insulated and non-insulated exterior walls, interior floors, interior walls, subway platforms, pools, swimming pools, and sewage tanks. They also demonstrate superior performance compared to polyurethane waterproof coatings in the face of long-term water immersion.

[0026] Polymer cement-based waterproof coating (JS waterproof coating) is a green and environmentally friendly material. It offers environmental friendliness, stable performance, excellent aging resistance, and a long waterproof life. It is also safe to use, easy to apply, and simple to operate, allowing it to be applied directly on damp surfaces without visible water. Therefore, it is suitable for pre-treatment waterproofing in kitchens and bathrooms, tiled roofs, building exteriors, basements, pools, and other areas. JS waterproof coating complies with the national standard GBT 23445-2009, "Polymer Cement Waterproof Coating." This standard categorizes products into three categories: I, II, and III, based on their physical properties. Type II is the most widely used.

[0027] In actual application, there are some problems with JS waterproof coating, mainly in the following aspects: 1. Cracking of thick coating: In the "Technical Specifications for Roofing Engineering" and "Technical Specifications for Underground Engineering Waterproofing", the basic thickness requirement of JS waterproof coating is 1.5mm~2.0mm. Affected by the base surface and construction environment, JS waterproof coating is prone to cracking when constructed on uneven base surface, at corners, and in outdoor sun and wind environments, affecting the waterproof performance of the coating; 2. Whitening and not drying of the coating: When JS waterproof coating is constructed in a low temperature and high humidity environment, the coating will turn white, resulting in the project being unable to be normally accepted, and more seriously, the coating will not dry.

[0028] In view of the above technical problems, an embodiment of the present application provides a waterproof coating having a higher powder-liquid ratio, and does not crack when applied thickly and the coating does not turn white.

[0029] The following first introduces the waterproof coating provided by this application.

[0030] According to the present application, the waterproof coating includes raw material component A and raw material component B, and the mass ratio of raw material component A to raw material component B is 1:1.5 to 1:1.8; raw material component A includes polymer emulsion, additives and solvents; raw material component B includes the following ingredients in parts by weight: silicate cement, 320 parts to 350 parts; calcium aluminate cement, 40 parts to 50 parts; rare earth modified illite mineral powder, 30 parts to 40 parts; filler, 500 parts to 600 parts; wherein, the rare earth modified illite mineral powder includes illite mineral powder and rare earth modified material, and the mass ratio of illite mineral powder to rare earth modified material is 4:1 to 5:1.

[0031] In the present application, the mass ratio of raw material component A to raw material component B can be 1:1.5, 1:1.55, 1:1.6, 1:1.65, 1:1.7, 1:1.75, 1:1.8, or any combination range of the above values.

[0032] In the present application, in the B raw material component, the silicate cement can be 320 parts, 330 parts, 335 parts, 340 parts, 350 parts, or any combination range of the above values; the calcium aluminate cement can be 40 parts, 42 parts, 45 parts, 48 ​​parts, 50 parts, or any combination range of the above values; the rare earth modified illite ore powder can be 30 parts, 32 parts, 34 parts, 36 parts, 38 parts, 40 parts, or any combination range of the above values; the filler can be 500 parts, 520 parts, 540 parts, 560 parts, 580 parts, 600 parts, or any combination range of the above values; the mass ratio of illite ore powder to rare earth modified material is 4:1, 4.1:1, 4.2:1, 4.3:1, 4.4:1, 4.5:1, 4.6:1, 4.7:1, 4.8:1, 4.9:1, 5:1, or any combination range of the above values.

[0033] The inventors discovered that rare earth-modified illite mineral powder can be added to polymer cement waterproof coatings as a reinforcement system. Illite powder has a naturally small particle size and good dispersibility in the polymer phase. These factors make illite powder more compatible with the coating system than other powder fillers. This better compatibility reduces the resistance to macromolecular chain movement (i.e., internal friction), thereby achieving a strengthening and toughening effect. The introduction of rare earths changes the structure of the polymer material. Specifically, the illite lamellae have a high charge density, which allows the illite to adsorb rare earth elements in an aqueous environment. Rare earth elements are adsorbed on the illite surface or enter its interlayers. The introduction of rare earth elements changes the charge between the illite lamellae, thereby changing the binding force, resulting in a better reinforcement effect between the illite and the polymer material, further causing structural changes in the polymer material. In addition, the curing reaction of inorganic gel materials such as rare earth-modified cement has a catalytic effect, further promoting its hydration. At the same time, the waterproof coating has a high powder-to-liquid ratio, which further reduces costs while ensuring properties such as no cracking when applied thickly.

[0034] In addition, the inorganic components in the waterproof coating of the present application adopt an inorganic gelling system mainly composed of ordinary Portland cement and calcium aluminate cement. By using calcium aluminate cement in combination, the cracking resistance and whitening resistance of the coating film are effectively improved. The use of calcium aluminate as a gelling material can effectively reduce or avoid the later alkali efflorescence of the waterproof coating since the hydration product of calcium aluminate cement does not produce free Ca(OH)2, thereby solving the problem of later alkali efflorescence and whitening.

[0035] The main mineral components of calcium aluminate cement are calcium aluminate (CaO·2Al2O3, abbreviated as CA2), and other aluminates (such as 2CaO·Al2O3·SiO2, abbreviated as C2AS; 12CaO·7Al2O3, abbreviated as C 12 A7, etc.).

[0036] The hydration principle of aluminate cement is shown in Table 1.

[0037] Table 1 Aluminate cement hydration principle

[0038]

[0039] In Table 1, C represents CaO, A represents Al2O3, and H represents H2O. 10 C3AH8 is a hexagonal flake crystal, and C3AH6 is a cubic crystal. The three have stable structures and can enhance the strength of the waterproof coating.

[0040] In some embodiments, the rare earth modifier includes one or more elements of scandium, yttrium and lanthanide elements. Preferably, the rare earth modifier includes one or more elements of lanthanum, cerium, neodymium, samarium, yttrium and gadolinium.

[0041] In some embodiments, the specific surface area of ​​illite ore powder is 65m 2 / g~100m 2 / g, for example, the specific surface area of ​​illite ore powder can be 65m 2 / g、70m 2 / g、75m 2 / g、80m 2 / g、85m 2 / g、90m 2 / g、95m 2 / g、100m 2 / g, or any combination of the above values.

[0042] In some embodiments, the particle size of the illite ore powder is 150 mesh to 200 mesh. For example, the particle size of the illite ore powder can be 150 mesh, 160 mesh, 170 mesh, 180 mesh, 190 mesh, 200 mesh, or any combination range of the above values.

[0043] In some embodiments, the filler includes calcium carbonate and / or S95 mineral powder. Optionally, the calcium carbonate is heavy calcium carbonate with a size of 150 to 200 mesh. For example, the particle size of the heavy calcium carbonate can be 150 mesh, 160 mesh, 170 mesh, 180 mesh, 190 mesh, 200 mesh, or any combination range of the above numerical values; and / or, the mass ratio of the A raw material component to the B raw material component is 1:1.7 to 1:1.8, for example, it can be 1:1.7, 1:1.71, 1:1.72, 1:1.73, 1:1.74, 1:1.75, 1:1.76, 1:1.77, 1:1.78, 1:1.79, 1:1.8, or any combination range of the above numerical values.

[0044] In some embodiments, the B raw material component may further include 5 to 8 parts of calcium sulfate by weight. For example, the calcium sulfate may be 5 parts, 6 parts, 7 parts, 8 parts, or any combination thereof.

[0045] In the above-described embodiment, the calcium sulfate and calcium aluminate cement in the waterproof coating of the present application react to form ettringite. The hydration product, ettringite, exhibits rapid formation, high water binding capacity, and shrinkage compensation capabilities. The rapid formation of ettringite shortens the setting time of the waterproof coating system, improves the early strength of the waterproof coating, reduces shrinkage, and addresses cracking issues in the waterproof coating.

[0046] The reaction between calcium sulfate and alumina cement is as follows:

[0047] 3CA+3CaSO4+41H2O→C3A·3CaSO4·32H2O+6Al(OH)3;

[0048] 3CA+CaSO4+21H2O→C3A·CaSO4·12H2O+6Al(OH)3;

[0049] In the formula, C represents CaO and A represents Al2O3.

[0050] In some embodiments, the raw material component B may further include 2 to 3 parts of a water reducer by weight. For example, the water reducer may be 2 parts, 2.2 parts, 2.5 parts, 2.8 parts, 3 parts, or any combination of the above values. Preferably, the water reducer is a melamine water reducer.

[0051] In some embodiments, the raw material component A includes, by weight: acrylic emulsion, 700 parts to 730 parts, for example, 700 parts, 705 parts, 710 parts, 715 parts, 720 parts, 725 parts, 730 parts, or any combination range of the above values; chloroprene emulsion, 80 parts to 100 parts, for example, 80 parts, 85 parts, 90 parts, 95 parts, 100 parts, or any combination range of the above values; water-based polyurethane emulsion, 70 parts to 80 parts, for example, 70 parts, 72 parts, 74 parts, 76 parts, 78 parts, 80 parts, or any combination range of the above values; plasticizer, 35 parts to 40 parts, for example, 35 parts, 36 parts, 37 parts, 38 parts, 39 parts, 40 parts, or any combination range of the above values; preservative, 2 parts to 3 parts, for example, 2 parts, 2 parts .2 parts, 2.4 parts, 2.6 parts, 2.8 parts, 3 parts, or any combination range of the above numerical values; defoaming agent, 2 parts to 3 parts, for example, can be 2 parts, 2.2 parts, 2.4 parts, 2.6 parts, 2.8 parts, 3 parts, or any combination range of the above numerical values; dispersant, 3 parts to 4 parts, for example, can be 3 parts, 3.2 parts, 3.4 parts, 3.6 parts, 3.8 parts, 4 parts, or any combination range of the above numerical values, preferably a sodium salt dispersant; solvent, 44 parts to 106 parts, for example, can be 44 parts, 50 parts, 60 parts, 70 parts, 80 parts, 90 parts, 100 parts, 106 parts, or any combination range of the above numerical values, preferably water; alkali swelling thickener, 2 parts to 3 parts, for example, can be 2 parts, 2.2 parts, 2.4 parts, 2.6 parts, 2.8 parts, 3 parts, or any combination range of the above numerical values.

[0052] In some embodiments, the waterproof coating satisfies at least one of the following: (1) the solid content of the acrylic emulsion is 50% to 60%, the minimum film forming temperature (MFT) is 5°C to 8°C, and the glass transition temperature (Tg) is -12°C to -8°C. For example, the solid content of the acrylic emulsion can be 50%, 52%, 55%, 58%, 60%, or any combination of the above values, and the minimum film forming temperature of the acrylic emulsion can be 5°C, 5.5°C, 6°C, 6.5°C, 7°C, 7.5°C, 8°C, 9°C, 10°C, 11°C, 12°C, 13°C, 15°C, 16°C, 17°C, 18°C, 19°C, 20°C, 21°C, 22°C, 23°C, 24°C, 25°C, 26°C, 27°C, 28°C, 29°C, 30°C, 31°C, 32°C, 33°C, 34°C, 36°C, 37°C, 38°C, 39°C, 40°C, 41°C, 42°C, 43°C, 44°C, 45°C, 46°C, 47°C, 48°C, 49°C, 50°C, 50 ℃, or any combination range of the above values, the glass transition temperature of the acrylic emulsion can be -12℃, -11℃, -10℃, -9℃, -8℃, or any combination range of the above values; (2) the solid content of the chloroprene emulsion is 55% to 65%, the minimum film forming temperature (MFT) is 5℃ to 8℃, and the glass transition temperature (Tg) is -20℃ to -10℃. For example, the solid content of the chloroprene emulsion can be 55%, 58%, 60%, 62%, 65%, or any combination range of the above values The minimum film-forming temperature of the chloroprene emulsion can be 5°C, 5.5°C, 6°C, 6.5°C, 7°C, 7.5°C, 8°C, or any combination of the above values, and the glass transition temperature of the chloroprene emulsion can be -20°C, -18°C, -15°C, -12°C, -10°C, or any combination of the above values; (3) the solid content of the aqueous polyurethane emulsion is 50% to 55%, the minimum film-forming temperature (MFT) is 5°C to 8°C, and the glass transition temperature (Tg) is -15°C to -10°C. For example, the solid content of the aqueous polyurethane emulsion can be 50%, 51%, 52%, 53%, 54%, 55%, or any combination range of the above numerical values; the minimum film-forming temperature of the aqueous polyurethane emulsion can be 5°C, 5.5°C, 6°C, 6.5°C, 7°C, 7.5°C, 8°C, or any combination range of the above numerical values; the glass transition temperature of the aqueous polyurethane emulsion can be -15°C, -14°C, -13°C, -12°C, -11°C, -10°C, or any combination range of the above numerical values.

[0053] Preparation method of waterproof coating

[0054] An embodiment of the present application provides a method for preparing a waterproof coating, comprising: doping and modifying illite ore powder and a rare earth modifier in a mass ratio of 4:1 to 5:1 to obtain rare earth-modified illite ore powder, wherein the doping and modification time is 5 to 10 minutes; stirring and mixing 320 to 350 parts of Portland cement, 40 to 50 parts of calcium aluminate cement, 30 to 40 parts of rare earth-modified illite ore powder, and 500 to 600 parts of calcium carbonate to obtain a raw material component B, wherein the stirring and mixing time is 15 to 20 minutes; stirring and mixing a polymer emulsion, an additive, and a solvent to obtain a raw material component A; and mixing the raw material component A and the raw material component B in a mass ratio of 1:1.5 to 1:1.8 to obtain a waterproof coating.

[0055] In some embodiments, in the step of mixing 320 to 350 parts of Portland cement, 40 to 50 parts of calcium aluminate cement, 30 to 40 parts of rare earth modified illite ore powder, and 500 to 600 parts of calcium carbonate to obtain raw material component B, 5 to 8 parts of calcium sulfate and / or 2 to 3 parts of a water reducer may be added before mixing.

[0056] In some embodiments, the raw material component A is obtained by the following method: 700 to 730 parts of acrylic emulsion, 80 to 100 parts of chloroprene emulsion, 70 to 80 parts of aqueous polyurethane emulsion, 35 to 40 parts of plasticizer and part of solvent are stirred at a speed of 600 r / min to 1000 r / min to obtain a first mixture; 2 to 3 parts of defoaming agent and 2 to 3 parts of preservative are added to the first mixture and stirred for 5 min to 10 min to obtain a second mixture; 2 to 3 parts of alkali swellable thickener are mixed and diluted with the remaining solvent and then added to the second mixture, stirred for 15 min to 20 min and then filtered to obtain the raw material component A. Preferably, the mixing and dilution ratio is 3 to 4 times, for example, it can be 3 times, 3.1 times, 3.2 times, 3.3 times, 3.4 times, 3.5 times, 3.6 times, 3.7 times, 3.8 times, 3.9 times, 4 times, or any combination range of the above values.

[0057] Waterproof coating

[0058] The present invention provides a waterproof coating prepared from the above-described waterproof coating and / or prepared using the above-described preparation method. Preferably, the waterproof coating has a thickness of 1.5 mm to 4 mm. Compared to existing waterproof coatings, the waterproof coating of the present invention can be thicker without cracking or whitening.

[0059] The following examples describe the present disclosure in more detail, and these examples are for illustrative purposes only.

[0060] Because various modifications and variations within the scope of the present disclosure will be apparent to those skilled in the art, unless otherwise stated, all parts, percentages, and ratios reported in the following examples are by mass, and all raw materials used in the examples are commercially available or prepared according to conventional methods and used directly without further treatment, and the instruments used in the examples are commercially available.

[0061] Example

[0062] In this embodiment, the acrylic emulsion is Budford 7366 emulsion with a solid content of 56%; the chloroprene emulsion is an anionic chloroprene latex produced by Jinan Rongzheng Chemical Co., Ltd. with a solid content of 60%; the water-based polyurethane emulsion is Baolijia 5619LA emulsion; DOTP is produced by Jinan Jiayang Chemical Co., Ltd.; the preservative is an isothiazolinone selected from MERGAL of Troy Company, USA K14; the sodium salt dispersant contains 45wt% of polyacrylate, and the viscosity of the sodium salt dispersant at 25°C is 20-100cps; the defoamer is a silicone defoamer selected from Kefeng Chemical DA480; the alkali-soluble thickener is selected from Wanhua's A406 associative alkali-soluble thickener; the gray cement is selected from Southwest Cement, with the label PO42.5R ordinary Portland cement; the calcium aluminate cement is selected from the calcium silicate cement of Kenos (China) Aluminate Technology Co., Ltd.; the anhydrous calcium sulfate is selected from the industrial-grade anhydrous calcium sulfate produced by Shandong Jiuzhong Chemical Co., Ltd.; the illite ore powder is selected from Lingshou County Dongshi Mineral Products Processing Plant, with a mesh size of 200 mesh; the rare earth modified material is purchased from the rare earth tailings of Inner Mongolia Baotou Steel Rare Earth (Group) High-Tech Co., Ltd.

[0063] Example 1

[0064] A waterproof coating is prepared by the following method:

[0065] 730 parts of acrylic emulsion, 100 parts of chloroprene emulsion, 80 parts of waterborne polyurethane emulsion, 40 parts of DOTP and 38 parts of clean water were pumped into a stirring kettle, and the stirrer was turned on to stir and mix at a rotation speed of 600 r / min to obtain a first mixture.

[0066] 2 parts of preservative and 2 parts of defoaming agent were added to the first mixture in sequence, the rotation speed was maintained at 600 r / min, and stirred for 5 minutes to obtain a second mixture.

[0067] 2 parts of alkali swellable thickener and 6 parts of water were diluted (1:3) and slowly added to the second mixture. After stirring for 15 minutes, the material was filtered through a 100-mesh filter to obtain the raw material of component A.

[0068] Illite ore powder and rare earth modified material are mixed in a mass ratio of 4:1 and stirred for 5-10 minutes to perform doping modification to obtain rare earth modified illite ore powder.

[0069] 350 parts of gray cement, 50 parts of calcium aluminate cement, 5 parts of anhydrous calcium sulfate, 40 parts of rare earth modified illite ore powder, 553 parts of heavy calcium and 2 parts of water reducer were added in sequence using a plowshare mixer and stirred for 15-20 minutes to obtain the B component raw material.

[0070] The raw material component A and the raw material component B are mixed in a mass ratio of 1:1.8 to obtain a waterproof coating.

[0071] The waterproof coating is formed in one step by roller coating or spraying to obtain a waterproof coating with a thickness of 1.5 mm.

[0072] Examples 2-4

[0073] The difference between Example 2-4 and Example 1 is that the mass ratio of raw material component A to raw material component B is different, as shown in Table 2 for details.

[0074] Examples 5-9

[0075] The difference between Examples 5-9 and Example 1 is that the contents of the components in the raw material component B are different, as shown in Table 2 for details.

[0076] Examples 10-11

[0077] The difference between Examples 10-11 and Example 1 is that the mass ratio of the rare earth modified material to the illite ore powder in the B raw material component is different, as shown in Table 2 for details.

[0078] Examples 12-13

[0079] The difference between Examples 12-13 and Example 1 is that the particle size of the illite ore powder in the B raw material component is different, as shown in Table 2 for details.

[0080] Example 14

[0081] The only difference between Example 14 and Example 1 is that the thickness of the waterproof coating prepared using the waterproof coating is 4 mm, as shown in Table 2 for details.

[0082] Example 15

[0083] The only difference between Example 15 and Example 6 is that the thickness of the waterproof coating prepared using the waterproof coating is 4 mm, as shown in Table 2.

[0084] Comparative Example 1-2

[0085] The difference between Comparative Example 1-2 and Example 1 is that the contents of the components in the raw material component B are different, as shown in Table 2 for details.

[0086] Comparative Example 3

[0087] The only difference between Comparative Example 3 and Comparative Example 1 is that the thickness of the waterproof coating prepared using the waterproof coating is 4 mm, as shown in Table 2.

[0088] Comparative Example 4

[0089] The difference between Comparative Example 4 and Example 1 is that the raw material component B does not contain calcium aluminate and the thickness of the waterproof coating prepared by the waterproof coating is 4 mm, as shown in Table 2.

[0090]

[0091]

[0092] Performance Testing

[0093] The waterproof coatings obtained in Examples 1-17 and Comparative Examples 1-4 were subjected to performance tests using the GB / T23445-2009 Type II standard, and the coatings were subjected to a whitening test and a practical drying test. The whitening test method was based on the appearance of the paint film with a wet film thickness of 1.5 mm to 4 mm at a high humidity of 70% to 85% RH. The practical drying test method was based on 16.2 of GB / T 16777-2008. The test results are shown in Table 3.

[0094] As shown in Table 3, the mechanical properties of the waterproof coating prepared using the present invention's waterproof coating and meeting the mass ratio of raw material component A to raw material component B of 1:1.5 to 1:1.8 are significantly superior to the mechanical property requirements for waterproof coatings in GB / T 23445-2009. Furthermore, according to Examples 1 and 9, the mechanical properties of the waterproof coating of the present invention can be further improved by adding calcium sulfate. Furthermore, according to Examples 1, 7-8, and 11-15, the mechanical properties of the waterproof coating of the present invention can be further improved by adjusting the parameters of the rare earth-modified illite mineral powder.

[0095] Moreover, according to Examples 16-17 and Comparative Examples 3-4, it can be seen that when the waterproof coating of the present application is used to prepare a waterproof coating, a thicker waterproof coating (4 mm) can be prepared without cracking and with excellent mechanical properties.

[0096]

[0097] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present application, and such modifications or substitutions should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A waterproof coating, characterized in that: Comprising raw material component A and raw material component B, wherein the mass ratio of raw material component A to raw material component B is 1:1.5 to 1:1.8; The raw material component A includes polymer emulsion, additives and solvent; The B raw material component includes the following ingredients in parts by weight: Portland cement, 320 to 350 parts; Calcium aluminate cement, 40 to 50 parts; Rare earth modified illite powder, 30-40 parts; Filler, 500 to 600 parts; The rare earth modified illite ore powder comprises illite ore powder and rare earth modified material, and the mass ratio of the illite ore powder to the rare earth modified material is 4:1 to 5:

1.

2. The waterproof coating according to claim 1, characterized in that The rare earth modifying material includes one or more elements of scandium, yttrium and lanthanide elements. Preferably, the rare earth modifying material includes one or more elements of lanthanum, cerium, neodymium, samarium, yttrium and gadolinium.

3. The waterproof coating according to claim 1, characterized in that The specific surface area of ​​the illite powder is 65 cm 2 / g~100cm 2 / g; And / or, the particle size of the illite ore powder is 150 mesh to 200 mesh.

4. The waterproof coating according to claim 1, characterized in that The filler includes calcium carbonate and / or S95 mineral powder. Preferably, the calcium carbonate is heavy calcium carbonate with a mesh size of 150 to 200. And / or, the mass ratio of the raw material component A to the raw material component B is 1:1.7 to 1:1.

8.

5. The waterproof coating according to claim 1, characterized in that: In parts by weight, the raw material component B further includes 5 to 8 parts of calcium sulfate; And / or, the raw material component B further comprises 2 to 3 parts of a water reducer in parts by weight. Preferably, the water reducer is a melamine water reducer.

6. The waterproof coating according to claim 1, characterized in that: In parts by weight, the raw material component A includes: Acrylic emulsion, 700-730 parts; Chloroprene emulsion, 80 to 100 parts; Water-based polyurethane emulsion, 70-80 parts; Plasticizer, 35 to 40 parts; Preservatives, 2 to 3 parts; Defoaming agent, 2 to 3 parts; Dispersant, 3 to 4 parts, preferably sodium salt dispersant; Solvent, 44 to 106 parts, preferably water; Alkali swelling thickener, 2 to 3 parts.

7. The waterproof coating according to claim 6, characterized in that: The waterproof coating satisfies at least one of the following conditions: (1) The acrylic emulsion has a solid content of 50% to 60%, a minimum film-forming temperature of 5°C to 8°C, and a glass transition temperature of -12°C to -8°C; (2) The solid content of the chloroprene emulsion is 55% to 65%, the minimum film-forming temperature is 5°C to 8°C, and the glass transition temperature is -20°C to -10°C; (3) The solid content of the aqueous polyurethane emulsion is 50% to 55%, the minimum film-forming temperature is 5°C to 8°C, and the glass transition temperature is -15°C to -10°C.

8. A method for preparing a waterproof coating, characterized in that: include: The polymer emulsion, additives and solvent are stirred and mixed to obtain raw material component A; Illite ore powder and rare earth modified material are doped and modified in a mass ratio of 4:1 to 5:1 to obtain rare earth modified illite ore powder, and the doping and modification time is 5 minutes to 10 minutes; 320 to 350 parts of Portland cement, 40 to 50 parts of calcium aluminate cement, 30 to 40 parts of rare earth modified illite powder and 500 to 600 parts of filler are stirred and mixed to obtain raw material component B. The stirring and mixing time is 15 to 20 minutes. The raw material component A and the raw material component B are mixed in a mass ratio of 1:1.5 to 1:1.8 to obtain the waterproof coating.

9. The preparation method according to claim 8, characterized in that In the step of mixing 320 to 350 parts of Portland cement, 40 to 50 parts of calcium aluminate cement, 30 to 40 parts of rare earth modified illite powder and 500 to 600 parts of filler to obtain raw material component B, 5 to 8 parts of calcium sulfate and / or 2 to 3 parts of water reducing agent are added before mixing; And / or, the A raw material component is obtained by the following method: 700 to 730 parts of acrylic emulsion, 80 to 100 parts of chloroprene emulsion, 70 to 80 parts of aqueous polyurethane emulsion, 35 to 40 parts of plasticizer and part of solvent are stirred and mixed at a speed of 600 to 1000 r / min to obtain a first mixture; Add 2 to 3 parts of defoaming agent and 2 to 3 parts of preservative to the first mixture, and stir for 5 to 10 minutes to obtain a second mixture; 2 to 3 parts of alkali swellable thickener are mixed and diluted with the remaining solvent, and then added to the second mixture. After stirring for 15 to 20 minutes, the mixture is filtered to obtain the raw material component A. Preferably, the mixing and dilution ratio is 3 to 4 times.

10. A waterproof coating, characterized in that: The waterproof coating is prepared by the waterproof coating according to any one of claims 1 to 7 and / or prepared by the waterproof coating obtained by the preparation method according to any one of claims 8 to 9. Preferably, the thickness of the waterproof coating is 1.5 mm to 4 mm.

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