Soundproofing and heat-insulating water-sand coating and preparation method thereof

Abstract

This invention relates to a sound-insulating and heat-insulating sand-coated coating and its preparation method, comprising a protective colloid, a base paint, and a continuous phase. The base paint comprises, by weight, 25-30 parts deionized water, 0.1-0.3 parts mildew inhibitor, 0.3-0.5 parts dispersant, 0.4-1 parts cellulose, 3-10 parts filler, 0.1-0.5 parts defoamer, 0.1-0.3 parts pH adjuster, 10-20 parts modified microcapsule emulsion, 0.5-1 part film-forming aid, 0.5-1 part antifreeze, 0.1-1 part bactericide, 0.1-1 part wetting agent, 0.1-1 part thickener, 30-50 parts quartz sand, and 5-10 parts protective colloid. The modified microcapsule emulsion is a hollow microcapsule emulsion with a core-shell structure, mainly composed of core monomers, shell monomers, emulsifiers, and initiators polymerized into a core-shell emulsion, which is then obtained through alkali swelling treatment. This invention uses modified microcapsule emulsion as the main emulsion of the base paint. After drying, the moisture in the microcapsules evaporates, forming a hollow structure in the middle, which enables the coating to have high heat insulation, sound insulation, decoration and energy saving and environmental protection, and has broad application prospects.

Description

Technical Field

[0001] This invention relates to the field of coating technology, and in particular to a sound-insulating and heat-insulating sand-coated coating and its preparation method. Background Technology

[0002] During the period from the 1990s to the 2010s, a large number of commercial and civil buildings used exterior wall flat paint or putty and cement mortar as exterior decoration surfaces. As of today, exterior wall flat paint has been largely replaced by real stone paint and multi-color paint in the current stage of decoration coatings. Multi-color paint, as a combination of topcoats, is the first choice for high-end coatings, with good imitation stone effect and excellent overall effect.

[0003] Exterior wall coatings are generally developing towards building energy conservation, and thermal insulation is an important aspect of saving energy, improving the living environment, and enhancing functionality. Currently, thermal insulation coatings mainly rely on the addition of reflective thermal insulation materials, such as reflective titanium dioxide and pigments, which achieve thermal insulation by scattering light. However, conventional reflective thermal insulation materials have the following problems: (1) their production is also a high-energy-consuming industry; (2) the degree of thermal insulation performance is affected by region or weather, and their effect is not significant in areas or weather with weak sunlight; (3) their function is relatively simple, and they do not strongly improve the increasingly complex living environment. Therefore, conventional reflective thermal insulation materials are difficult to meet people's increasingly high requirements for building thermal insulation, energy conservation, and environmental protection.

[0004] In view of this, the present invention is hereby proposed. Summary of the Invention

[0005] The technical problem to be solved by the present invention is: the present invention provides a sound-insulating and heat-insulating sand-coated coating and its preparation method. By introducing modified microcapsule emulsion as the main emulsion into the base paint, and utilizing its core-shell hollow structure, the coating is endowed with excellent heat insulation and sound insulation properties, while effectively reducing the amount of covering powder titanium dioxide and kaolin used, thereby achieving the purpose of energy conservation and emission reduction.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0007] This invention provides a sound-insulating and heat-insulating sand-coated coating, comprising a protective adhesive, a base paint, and a continuous phase, wherein the base paint comprises, by weight:

[0008] 25-30 parts deionized water, 0.1-0.3 parts mildew inhibitor, 0.3-0.5 parts dispersant, 0.4-1 parts cellulose, 3-10 parts filler, 0.1-0.5 parts defoamer, 0.1-0.3 parts pH adjuster, 10-20 parts modified microcapsule emulsion, 0.5-1 part film-forming aid, 0.5-1 part antifreeze, 0.1-1 part bactericide, 0.1-1 part wetting agent, 0.1-1 part thickener, 30-50 parts quartz sand, and 5-10 parts protective colloid.

[0009] The modified microcapsule emulsion is a hollow microcapsule emulsion with a core-shell structure. It is mainly produced by polymerizing core monomers, shell monomers, emulsifiers and initiators into a core-shell emulsion, and then undergoing alkali swelling treatment.

[0010] This invention proposes a sound-insulating and heat-insulating sand-coated coating, which uses a modified microcapsule emulsion as the main emulsion of the base paint. After drying, the moisture in the microcapsules evaporates, forming a hollow structure in the center. Firstly, the presence of this structure results in different refractive indices of light at different interfaces, and the modified microcapsule emulsion can act as a masking agent, thus effectively reducing the amount of covering powders such as titanium dioxide and kaolin used in the coating. Secondly, this structure can fix air within the base paint particles, and the particles can form a certain thickness. The fixed air has excellent slow heat conduction, making the coating less affected by external temperature changes, thereby achieving excellent thermal insulation. Thirdly, the air-fixing structure and the hollow microporous structure can effectively absorb and dissipate sound waves, reducing vibration and resonance generated when sound waves propagate in the material, giving the coating better sound insulation. The sound-insulating and heat-insulating sand-coated coating prepared by this invention combines high heat insulation, sound insulation, decorative properties, and energy saving and environmental protection, and has broad application prospects.

[0011] Optionally, the core monomer includes methyl methacrylate, butyl acrylate, and methyl acrylate; the shell monomer includes styrene, ethylene glycol dimethacrylate, and divinylbenzene.

[0012] Optionally, the method for preparing the modified microcapsule emulsion includes the following steps:

[0013] S1. Mix 94.95 parts of deionized water and 0.2 parts of emulsifier, heat to 70-80℃, add 4.8 parts of seed monomer, pre-emulsify for 5 minutes, then add 0.05 parts of initiator, keep warm for 3 hours, cool to room temperature, and obtain seed emulsion.

[0014] S2. Take 30 parts of the above seed emulsion, heat it to 70-80℃, and add dropwise a water mixture of 15 parts of nuclear monomer, 0.2 parts of emulsifier, and 0.1 parts of initiator. The dropwise addition time is 4 hours. After the dropwise addition is completed, keep it warm for another hour and cool it to room temperature to obtain the nuclear emulsion.

[0015] S3. Take 40 parts of the above-mentioned core emulsion, heat it to 70-80℃, and add dropwise a water mixture of 35 parts of shell monomer, 0.2 parts of emulsifier, and 0.1 parts of initiator. The dropwise addition time is 4 hours. After the dropwise addition is completed, keep it warm for another hour and cool it to room temperature to obtain the core-shell emulsion.

[0016] S4. The above core-shell emulsion is subjected to alkali swelling treatment with ammonia water, heated to 80-90℃, kept at the temperature for 3 hours, and cooled to room temperature to obtain modified microcapsule emulsion.

[0017] As described above, the shell monomer of this invention incorporates ethylene glycol dimethacrylate and divinylbenzene. Compared with conventional methyl methacrylate monomers, the resulting latex particles have a distinct hollow morphology, and the hollow portion in the middle of the latex particles has a regular shape, exhibiting a clear spherical shape. This can improve the strength of the shell layer, ensuring that the hollow latex particles obtained in the final application will not have reduced covering efficiency due to cracking or collapse.

[0018] Optionally, in step S1, the seed monomer includes methyl methacrylate and methacrylic acid.

[0019] Optionally, the protective adhesive liquid, by weight, comprises:

[0020] 89-94 parts deionized water, 0.1-0.5 parts dispersant, 0.1-0.5 parts bactericide, 0.1-0.3 parts anti-settling agent, and 6-10 parts protective adhesive powder.

[0021] Optionally, the continuous phase comprises, by weight:

[0022] 5-20 parts deionized water, 65-80 parts emulsion, 2-5 parts film-forming aid, 1-3 parts antifreeze, 0.1-0.5 parts pH adjuster, and 0.1-1 parts thickener.

[0023] Optionally, the antifungal agent is an isothiazolinone bactericide;

[0024] The dispersant is a general-purpose sodium polycarboxylate dispersant;

[0025] The cellulose is hydroxyethyl cellulose;

[0026] The filler material is kaolin;

[0027] The film-forming aid is 2,2,4-trimethyl-1,3-pentanediol monoisobutyrate;

[0028] The antifreeze is propylene glycol;

[0029] The wetting agent is an anionic wetting agent containing alkyl sulfate components;

[0030] The thickener is a hydrophobically modified alkali-soluble emulsion type thickener.

[0031] Optionally, the protective adhesive powder is a mixture of magnesium aluminum silicate and magnesium lithium silicate;

[0032] The anti-settling agent is organic bentonite.

[0033] Optionally, the emulsion is a mixture of pure acrylic emulsion and modified microcapsule emulsion.

[0034] Another aspect of the present invention provides a method for preparing the above-mentioned sound-insulating and heat-insulating sand-coated coating, comprising the following steps:

[0035] A1. Prepare the protective adhesive, base paint and continuous phase separately, and fill them into containers for later use;

[0036] A2. According to the color of the colored spots in the stone being imitated, add the color paste to the base paint to make the desired color;

[0037] A3. According to the size and proportion of the colored dots on the stone, add the adjusted base paint of each color to the protective adhesive in batches for granulation.

[0038] A4. Add the continuous phase and mix until homogeneous, then fill the container.

[0039] The preparation method of the base paint includes the following steps:

[0040] (1) Add deionized water to the container, adjust the speed to 400-500 rpm, add antifungal agent and dispersant and stir for 1-2 minutes;

[0041] (2) Adjust the speed to 700-800 rpm, add cellulose and stir for 5-10 min;

[0042] (3) Adjust the speed to 800-900 rpm, add filler, defoamer and pH adjuster, then adjust the speed to 1200-1500 rpm and stir for 30 min;

[0043] (4) Adjust the speed to 800-1000 rpm, add modified microcapsule emulsion, film-forming aid, antifreeze, bactericide, wetting agent, thickener and quartz sand, and stir for 10-15 min;

[0044] (5) Adjust the speed to 1000-1200 rpm, add the protective adhesive and stir for 4-5 minutes to obtain the product. Attached Figure Description

[0045] Figure 1 This is an electron microscope image of the modified microcapsule emulsion prepared in Example 1 of the present invention. Detailed Implementation

[0046] To better understand the above technical solutions, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present invention can be understood more clearly and thoroughly, and that the scope of the present invention can be fully conveyed to those skilled in the art.

[0047] This invention provides a sound-insulating and heat-insulating sand-coated coating, comprising a protective colloid, a base paint, and a continuous phase in a weight ratio of 20-30:50-60:20-30, wherein the base paint comprises, by weight:

[0048] 25-30 parts deionized water, 0.1-0.3 parts mildew inhibitor, 0.3-0.5 parts dispersant, 0.4-1 parts cellulose, 3-10 parts filler, 0.1-0.5 parts defoamer, 0.1-0.3 parts pH adjuster, 10-20 parts modified microcapsule emulsion, 0.5-1 part film-forming aid, 0.5-1 part antifreeze, 0.1-1 part bactericide, 0.1-1 part wetting agent, 0.1-1 part thickener, 30-50 parts quartz sand, and 5-10 parts protective colloid.

[0049] The modified microcapsule emulsion is a hollow microcapsule emulsion with a core-shell structure. It is mainly produced by polymerizing core monomers, shell monomers, emulsifiers and initiators into a core-shell emulsion, and then undergoing alkali swelling treatment.

[0050] The core monomers include methyl methacrylate, butyl acrylate, and methyl acrylate; the shell monomers include styrene, ethylene glycol dimethacrylate, and divinylbenzene.

[0051] The method for preparing the modified microcapsule emulsion includes the following steps:

[0052] S1. Mix 94.95 parts of deionized water and 0.2 parts of emulsifier, heat to 70-80℃, add 4.8 parts of seed monomer, pre-emulsify for 5 minutes, then add 0.05 parts of initiator, keep warm for 3 hours, cool to room temperature, and obtain seed emulsion.

[0053] The seed monomers include methyl methacrylate and methacrylic acid.

[0054] S2. Take 30 parts of the above seed emulsion, heat it to 70-80℃, and add dropwise a water mixture of 15 parts of nuclear monomer, 0.2 parts of emulsifier, and 0.1 parts of initiator. The dropwise addition time is 4 hours. After the dropwise addition is completed, keep it warm for another 1 hour and cool it to room temperature to obtain the nuclear emulsion.

[0055] S3. Take 40 parts of the above-mentioned core emulsion, heat it to 70-80℃, and add dropwise a water mixture of 35 parts of shell monomer, 0.2 parts of emulsifier, and 0.1 parts of initiator. The dropwise addition time is 4 hours. After the dropwise addition is completed, keep it warm for another 1 hour and cool it to room temperature to obtain the core-shell emulsion.

[0056] S4. The above core-shell emulsion is subjected to alkali swelling treatment with ammonia water, heated to 80-90℃, kept at the temperature for 3 hours, and cooled to room temperature to obtain modified microcapsule emulsion.

[0057] In some preferred embodiments of the present invention, the antifungal agent is an isothiazolinone bactericide, specifically MERGAL 786.

[0058] The dispersant is a general-purpose sodium polycarboxylate dispersant, specifically OROTAN 731A;

[0059] The cellulose is hydroxyethyl cellulose, using hydroxyethyl cellulose 250HBR and / or hydroxyethyl cellulose 250HHBR;

[0060] The filler material is kaolin;

[0061] The defoamer used is Corning FoamStar A10;

[0062] The pH adjuster used is Dow Chemical's AMP-95 and / or Aiwande's butylethanolamine;

[0063] The film-forming aid is 2,2,4-trimethyl-1,3-pentanediol monoisobutyrate;

[0064] The antifreeze is propylene glycol;

[0065] The bactericide used is MERGAL K9N;

[0066] The wetting agent is an anionic wetting agent with alkyl sulfate components, specifically G-399;

[0067] The thickener is a hydrophobically modified alkali-soluble emulsion thickener, specifically ACRYSOL TT-935.

[0068] The preparation method of the base paint includes the following steps:

[0069] (1) Add deionized water to the container, adjust the speed to 400-500 rpm, add antifungal agent and dispersant and stir for 1-2 minutes.

[0070] (2) Adjust the speed to 700-800 rpm, add cellulose and stir for 5-10 min.

[0071] (3) Adjust the speed to 800-900 rpm, add filler, defoamer and pH adjuster, then adjust the speed to 1200-1500 rpm and stir for 30 min.

[0072] (4) Adjust the speed to 800-1000 rpm, add modified microcapsule emulsion, film-forming aid, antifreeze, bactericide, wetting agent, thickener and quartz sand, and stir for 10-15 min.

[0073] (5) Adjust the speed to 1000-1200 rpm, add the protective adhesive and stir for 4-5 minutes to obtain the product.

[0074] The protective adhesive liquid, by weight, is:

[0075] 89-94 parts deionized water, 0.1-0.5 parts dispersant, 0.1-0.5 parts bactericide, 0.1-0.3 parts anti-settling agent, and 6-10 parts protective adhesive powder.

[0076] The protective adhesive powder is a mixture of magnesium aluminum silicate and magnesium lithium silicate;

[0077] The anti-settling agent is organic bentonite.

[0078] In some preferred embodiments of the present invention, the method for preparing the protective adhesive includes the following steps:

[0079] (1) Add deionized water to the container, adjust the speed to 400-500 rpm, add dispersant and bactericide and stir for 3 minutes.

[0080] (2) Adjust the speed to 1200-1400 rpm, add protective adhesive powder and anti-settling agent, stir for 50 minutes, and you will get the product.

[0081] The continuous phase comprises, by weight:

[0082] 5-20 parts deionized water, 65-80 parts emulsion, 2-5 parts film-forming aid, 1-3 parts antifreeze, 0.1-0.5 parts pH adjuster, and 0.1-1 parts thickener.

[0083] The emulsion is a mixture of pure acrylic emulsion and modified microcapsule emulsion.

[0084] In some preferred embodiments of the present invention, the pure acrylic emulsion is a composite emulsion of pure acrylic emulsion RS-706T and pure acrylic emulsion RS-3799A.

[0085] In some preferred embodiments of the present invention, the method for preparing the continuous phase includes the following steps:

[0086] (1) Add deionized water to the container, adjust the speed to 400-600 rpm, add emulsion, film-forming aid, antifreeze and pH adjuster, and stir for 8-10 min.

[0087] (2) Continue adding thickener, adjust the speed to 800-1000 rpm, and stir for 5 minutes to obtain the final product. The sound-insulating and heat-insulating sand-coated coating is prepared by the following method, including the following steps:

[0088] A1. Prepare the protective adhesive, base paint and continuous phase separately, and fill them into containers for later use.

[0089] A2. According to the color of the colored spots in the stone being imitated, add the color paste to the base paint to make the desired color.

[0090] A3. According to the size and proportion of the colored dots on the stone, the adjusted base paints of each color are added to the protective adhesive in batches for granulation.

[0091] A4. Add the continuous phase and mix until homogeneous, then fill the container.

[0092] Example 1

[0093] A sound-insulating and heat-insulating sand-coated coating comprises a protective colloid, a base paint, and a continuous phase in a weight ratio of 20:60:20, wherein the base paint comprises, by weight:

[0094] 25.5 parts deionized water, 0.2 parts mildew inhibitor, 0.3 parts dispersant, 0.9 parts cellulose (0.3 parts 250HBR, 0.6 parts 250HHBR), 5 parts filler, 0.4 parts defoamer, 0.3 parts pH adjuster (AMP-95), 20 parts modified microcapsule emulsion, 1 part film-forming aid, 0.5 parts antifreeze, 0.4 parts bactericide, 0.4 parts wetting agent, 0.1 parts thickener, 40 parts quartz sand, and 5 parts protective colloid.

[0095] The modified microcapsule emulsion is a hollow microcapsule emulsion with a core-shell structure. It is mainly produced by polymerizing core monomers, shell monomers, emulsifiers and initiators into a core-shell emulsion, and then undergoing alkali swelling treatment.

[0096] The core monomers include methyl methacrylate, butyl acrylate, and methyl acrylate; the shell monomers include styrene, ethylene glycol dimethacrylate, and divinylbenzene.

[0097] The method for preparing the modified microcapsule emulsion includes the following steps:

[0098] S1. Mix 94.95 parts of deionized water and 0.2 parts of emulsifier, heat to 80℃, add 4.8 parts of seed monomer (methyl methacrylate, methacrylic acid), pre-emulsify for 5 min, then add 0.05 parts of initiator, keep warm for 3 h, cool to room temperature, and obtain seed emulsion.

[0099] S2. Take 30 parts of the above seed emulsion, heat it to 80℃, and add dropwise a water mixture of 15 parts of nuclear monomer, 0.2 parts of emulsifier, and 0.1 parts of initiator. The dropwise addition time is 4 hours. After the dropwise addition is completed, keep it warm for another hour and cool it to room temperature to obtain the nuclear emulsion.

[0100] S3. Take 40 parts of the above-mentioned core emulsion, heat it to 80°C, and add dropwise a mixture of 35 parts of shell monomer, 0.2 parts of emulsifier, and 0.1 parts of initiator. The dropwise addition time is 4 hours. After the dropwise addition is completed, keep it warm for another hour and cool it to room temperature to obtain the core-shell emulsion.

[0101] S4. The above core-shell emulsion was subjected to alkali swelling treatment with ammonia water, heated to 90°C, kept at that temperature for 3 hours, and cooled to room temperature to obtain the modified microcapsule emulsion.

[0102] The protective adhesive liquid, by weight, is:

[0103] 89 parts deionized water, 0.5 parts dispersant, 0.4 parts bactericide, 0.1 parts anti-settling agent, and 10 parts protective adhesive powder.

[0104] The protective adhesive powder is a mixture of magnesium aluminum silicate and magnesium lithium silicate;

[0105] The anti-settling agent is organic bentonite.

[0106] The continuous phase comprises, by weight:

[0107] 19.2 parts deionized water, 74 parts emulsion (5 parts modified microcapsule emulsion, 9 parts pure acrylic emulsion RS-706T, 60 parts pure acrylic emulsion RS-3799A), 4.3 parts film-forming aid, 2 parts antifreeze, 0.2 parts pH adjuster, and 0.3 parts thickener.

[0108] The sound-insulating and heat-insulating sand-coated coating is prepared by the following method, including the following steps:

[0109] A1. Prepare the protective adhesive, base paint and continuous phase separately, and fill them into containers for later use.

[0110] The preparation method of the base paint includes the following steps:

[0111] (1) Add deionized water to the container, adjust the speed to 400-500 rpm, add antifungal agent and dispersant and stir for 1-2 minutes.

[0112] (2) Adjust the speed to 700-800 rpm, add cellulose and stir for 5-10 min.

[0113] (3) Adjust the speed to 800-900 rpm, add filler, defoamer and pH adjuster, then adjust the speed to 1200-1500 rpm and stir for 30 min.

[0114] (4) Adjust the speed to 800-1000 rpm, add modified microcapsule emulsion, film-forming aid, antifreeze, bactericide, wetting agent, thickener and quartz sand, and stir for 10-15 min.

[0115] (5) Adjust the speed to 1000-1200 rpm, add the protective adhesive and stir for 4-5 minutes to obtain the product.

[0116] The preparation method of the protective adhesive liquid includes the following steps:

[0117] (1) Add deionized water to the container, adjust the speed to 400-500 rpm, add dispersant and bactericide and stir for 3 minutes.

[0118] (2) Adjust the speed to 1200-1400 rpm, add protective adhesive powder and anti-settling agent, stir for 50 minutes, and you will get the product.

[0119] The method for preparing the continuous phase includes the following steps:

[0120] (1) Add deionized water to the container, adjust the speed to 400-600 rpm, add emulsion, film-forming aid, antifreeze and pH adjuster, and stir for 8-10 min.

[0121] (2) Continue to add thickener, adjust the speed to 800-1000 rpm, stir for 5 minutes, and you will get the product.

[0122] A2. According to the color of the colored spots in the stone being imitated, add the color paste to the base paint to make the desired color.

[0123] A3. According to the size and proportion of the colored dots on the stone, the adjusted base paints of each color are added to the protective adhesive in batches for granulation.

[0124] A4. Add the continuous phase and mix until homogeneous, then fill the container.

[0125] Example 2

[0126] The difference between this embodiment and Embodiment 1 is that the amount of each component is different.

[0127] A sound-insulating and heat-insulating sand-coated coating comprises a protective colloid, a base paint, and a continuous phase in a weight ratio of 20:60:20, wherein the base paint comprises, by weight:

[0128] 25.8 parts deionized water, 0.2 parts mildew inhibitor, 0.5 parts dispersant, 0.9 parts cellulose (250HBR), 8 parts filler, 0.5 parts defoamer, 0.3 parts pH adjuster (AMP-95), 13 parts modified microcapsule emulsion, 1 part film-forming aid, 1 part antifreeze, 0.5 parts bactericide, 0.2 parts wetting agent, 0.1 parts thickener, 40 parts quartz sand, and 8 parts protective colloid.

[0129] The protective adhesive liquid, by weight, is:

[0130] 91.9 parts deionized water, 0.5 parts dispersant, 0.5 parts bactericide, 0.1 parts anti-settling agent, and 7 parts protective adhesive powder.

[0131] The continuous phase comprises, by weight:

[0132] 17.1 parts deionized water, 76 parts emulsion (3 parts modified microcapsule emulsion, 15 parts pure acrylic emulsion RS-706T, 58 parts pure acrylic emulsion RS-3799A), 4.4 parts film-forming aid, 2 parts antifreeze, 0.2 parts pH adjuster, and 0.3 parts thickener.

[0133] The rest is the same as in Example 1.

[0134] Example 3

[0135] The difference between this embodiment and Embodiment 2 is that the mass ratio of the protective adhesive, base paint and continuous phase is 30:50:20.

[0136] Comparative Example 1

[0137] The difference between this comparative example and Example 1 is that an equal amount of pure acrylic emulsion RS-3799A is used to replace the modified microcapsule emulsion in the base paint; the emulsion in the continuous phase does not contain the modified microcapsule emulsion, and is a mixed emulsion of 11 parts of pure acrylic emulsion RS-706T and 63 parts of pure acrylic emulsion RS-3799A.

[0138] Comparative Example 2

[0139] The difference between this comparative example and Example 1 is that the base paint uses an equal amount of reflective heat-insulating titanium dioxide to replace the filler, and an equal amount of pure acrylic emulsion RS-3799A to replace the modified microcapsule emulsion; the continuous phase emulsion does not contain the modified microcapsule emulsion, and is a mixed emulsion of 11 parts of pure acrylic emulsion RS-706T and 63 parts of pure acrylic emulsion RS-3799A.

[0140] The coatings prepared in Examples 1-3 and Comparative Examples 1-2 were subjected to performance tests, and the results are recorded in Table 1.

[0141] Table 1 Performance Test Results

[0142]

[0143]

[0144] As can be seen from the data in Table 1, the sound-insulating and heat-insulating sand-coated coatings prepared in Examples 1-3 of this invention, compared with Comparative Example 1 (which does not contain modified microcapsule emulsion) and Comparative Example 2 (which uses conventional reflective heat-insulating products), exhibit superior performance due to the use of microcapsule emulsions with a core-shell hollow structure (see Table 1). Figure 1 It can effectively provide thermal insulation in different time periods and regions, while also providing sound insulation. At the same time, due to its good light refraction and scattering effect, it can effectively protect the chemical bonds inside the emulsion, resulting in coatings with excellent physical and chemical properties.

[0145] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A sound-insulating and heat-insulating sand-coated coating, comprising a protective adhesive, a base paint, and a continuous phase, wherein, The base paint consists of the following components in parts by weight: 25-30 parts deionized water, 0.1-0.3 parts mildew inhibitor, 0.3-0.5 parts dispersant, 0.4-1 parts cellulose, 3-10 parts filler, 0.1-0.5 parts defoamer, 0.1-0.3 parts pH adjuster, 10-20 parts modified microcapsule emulsion, 0.5-1 part film-forming aid, 0.5-1 part antifreeze, 0.1-1 part bactericide, 0.1-1 part wetting agent, 0.1-1 part thickener, 30-50 parts quartz sand, and 5-10 parts protective colloid. The continuous phase comprises, by weight: 5-20 parts deionized water, 65-80 parts emulsion, 2-5 parts film-forming aid, 1-3 parts antifreeze, 0.1-0.5 parts pH adjuster, and 0.1-1 parts thickener; The emulsion is a mixture of pure acrylic emulsion and modified microcapsule emulsion; The modified microcapsule emulsion is a hollow microcapsule emulsion with a core-shell structure; The method for preparing the modified microcapsule emulsion includes the following steps: S1. Mix 94.95 parts of deionized water and 0.2 parts of emulsifier, heat to 70-80℃, add 4.8 parts of seed monomer, pre-emulsify for 5 minutes, then add 0.05 parts of initiator, keep warm for 3 hours, cool to room temperature, and obtain seed emulsion. The seed monomers are methyl methacrylate and methacrylic acid; S2. Take 30 parts of the above seed emulsion, heat it to 70-80℃, and add dropwise a water mixture of 15 parts of nuclear monomer, 0.2 parts of emulsifier, and 0.1 parts of initiator. The dropwise addition time is 4 hours. After the dropwise addition is completed, keep it warm for another hour and cool it to room temperature to obtain the nuclear emulsion. The core monomer is methyl methacrylate, butyl acrylate and methyl acrylate; S3. Take 40 parts of the above-mentioned core emulsion, heat it to 70-80℃, and add dropwise a water mixture of 35 parts of shell monomer, 0.2 parts of emulsifier, and 0.1 parts of initiator. The dropwise addition time is 4 hours. After the dropwise addition is completed, keep it warm for another hour and cool it to room temperature to obtain the core-shell emulsion. The shell monomer is styrene, ethylene glycol dimethacrylate, and divinylbenzene; S4. The above core-shell emulsion is subjected to alkali swelling treatment with ammonia water, heated to 80-90℃, kept at the temperature for 3 hours, and cooled to room temperature to obtain modified microcapsule emulsion.

2. The sound-insulating and heat-insulating sand-coated coating as described in claim 1, characterized in that, The protective adhesive solution is composed of the following components in parts by weight: 89-94 parts deionized water, 0.1-0.5 parts dispersant, 0.1-0.5 parts bactericide, 0.1-0.3 parts anti-settling agent, and 6-10 parts protective adhesive powder.

3. The sound-insulating and heat-insulating sand-coated coating as described in claim 1, characterized in that, The antifungal agent is an isothiazolinone bactericide; The dispersant is a general-purpose sodium polycarboxylate dispersant; The cellulose is hydroxyethyl cellulose; The filler material is kaolin; The film-forming aid is 2,2,4-trimethyl-1,3-pentanediol monoisobutyrate; The antifreeze is propylene glycol; The wetting agent is an anionic wetting agent containing alkyl sulfate components; The thickener is a hydrophobically modified alkali-soluble emulsion type thickener.

4. The sound-insulating and heat-insulating sand-coated coating as described in claim 2, characterized in that, The protective adhesive powder is a mixture of magnesium aluminum silicate and magnesium lithium silicate; The anti-settling agent is organic bentonite.

5. A method for preparing a sound-insulating and heat-insulating sand-coated coating as described in claim 1, comprising the following steps: A1. Prepare the protective adhesive, base paint and continuous phase separately, and fill them into containers for later use; A2. According to the color of the colored spots in the stone being imitated, add the color paste to the base paint to make the desired color; A3. According to the size and proportion of the colored dots on the stone, add the adjusted base paint of each color to the protective adhesive in batches for granulation. A4. Add the continuous phase and mix until homogeneous, then fill the container. The preparation method of the base paint includes the following steps: (1) Add deionized water to the container, adjust the speed to 400-500 rpm, add antifungal agent and dispersant and stir for 1-2 min; (2) Adjust the speed to 700-800 rpm, add cellulose and stir for 5-10 min; (3) Adjust the speed to 800-900 rpm, add filler, defoamer and pH adjuster, then adjust the speed to 1200-1500 rpm and stir for 30 min; (4) Adjust the speed to 800-1000 rpm, add modified microcapsule emulsion, film-forming aid, antifreeze, bactericide, wetting agent, thickener and quartz sand, and stir for 10-15 min; (5) Adjust the speed to 1000-1200 rpm, add the protective adhesive and stir for 4-5 minutes to obtain the product.

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