A kind of diffuse reflection anti-fogging sound-absorbing paint for protecting vision and preparation method thereof

Abstract

The application discloses a kind of vision-protecting diffuse reflection dew prevention sound-absorbing paint and preparation method.The paint includes bottom coating and surface coating;The bottom coating is two components, including self-made foamed soil enhancer, nano magnesium oxide dispersion, nano barium sulfate dispersion, magnesium sulfate and wollastonite powder, acicular calcium silicate fiber powder, modified sawdust particles, modified foamed soil mixture and the like;Surface coating includes nano silicon dioxide dispersion, modified hydrophilic silica sol, nano magnesium oxide, nano barium sulfate, modified foamed soil mixture, lithium water glass and nano aerogel slurry and the like.The application forms three-dimensional network porous structure through the synergistic effect of bottom and surface layer, so that coating has high diffuse reflectivity (≥95%), excellent moisture absorption dew prevention (moisture absorption amount ≥41g / ㎡), good sound-absorbing noise reduction (sound-absorbing coefficient 0.52-0.83) and heat insulation function, effectively protect vision and improve indoor environment.

Description

Technical Field

[0001] This invention relates to the field of interior wall decoration technology, and in particular to an interior wall coating that combines diffuse reflection for eye protection, condensation prevention, sound absorption and noise reduction, and thermal insulation functions, as well as its preparation method. Background Technology

[0002] Factors affecting human vision are diverse, with light pollution, noise, living environment, and air quality all having a significant impact on visual health. Prolonged exposure to excessive and unbalanced light radiation can cause chronic damage to the eyes, inducing vision decline. Simultaneously, noise interference and poor indoor air quality can indirectly affect visual acuity. Furthermore, in high-humidity weather such as during the humid spring season, building walls are prone to condensation, leading not only to mold growth but also severely deteriorating living and working environments. Therefore, developing a multifunctional energy-saving coating that can reduce light pollution and noise interference through diffuse reflection, effectively prevent condensation, and improve air quality has profound research significance and application value.

[0003] Existing sound-absorbing coatings mostly dissipate sound energy by introducing porous materials or fiber structures. For example, patent CN107760182A discloses a sound-absorbing coating composition comprising an aqueous polyurethane emulsion and titanium dioxide and composite fibers dispersed therein, wherein the composite fibers include an inner core with macropores and an outer wall containing mesopores. This technical solution utilizes composite fibers with different pore structures inside and out to block sound wave transmission and utilizes the light-reflecting effect of titanium dioxide to slow down coating aging. However, the light reflection design in this solution mainly focuses on improving the weather resistance of the coating, and is insufficient in optimizing the indoor light environment and reducing light pollution to protect eyesight through specific diffuse reflection treatments. Furthermore, this coating composition lacks effective technical means to address condensation and mold prevention on indoor walls.

[0004] For example, patent CN107699025A discloses a coating with sound-absorbing properties, composed of petroleum asphalt, diatomaceous earth, butanol-based organosilicon fluorescein polymer, corn flour, and various mineral powders. This solution claims to have sound absorption, automatic moisture absorption and release, and heat storage functions, and can regulate indoor humidity to a certain extent. However, its shortcomings lie in the fact that the use of components such as petroleum asphalt and condensate oil limits its environmental friendliness and odor control in indoor environments. Furthermore, its technological focus is on temperature and humidity regulation and sound absorption, without considering the protective effect of the coating surface's optical properties on human vision. The synergistic design of diffuse reflection for eye protection and efficient anti-condensation still needs improvement. Summary of the Invention

[0005] This invention provides a diffuse reflection anti-condensation sound-absorbing coating that can protect eyesight and its preparation method. It aims to solve the technical problems mentioned in the background art, such as light pollution damaging eyesight, condensation and mold growth on walls during humid weather, and indoor noise interference, by constructing a composite filler with a specific micro-nano hierarchical structure and a biomimetic breathing film-forming system.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A diffuse reflection anti-condensation sound-absorbing coating that can protect eyesight includes a base coat and a top coat;

[0008] The underlying coating is a two-component coating, consisting of component A and component B, with a weight ratio of component A to component B of 1:3-3.5.

[0009] The A component is made from the following raw materials in parts by weight: 30-40 parts water, 50-60 parts self-made foaming clay reinforcing agent, 5-10 parts nano magnesium oxide dispersion, 5-10 parts nano barium sulfate dispersion, and 5-8 parts magnesium sulfate.

[0010] The B component is made from the following raw materials in parts by weight: 5-10 parts wollastonite powder, 5-10 parts needle-shaped calcium silicate fiber powder, 3-5 parts barium sulfate, 10-15 parts lightly calcined magnesium oxide powder, 1-5 parts modified sawdust particles, 40-60 parts of 80-100 mesh first modified foamed clay mixture, and 10-30 parts of 200-300 mesh second modified foamed clay mixture.

[0011] The topcoat is made from the following raw materials in parts by weight: 20-40 parts water, 0.5-1 parts dispersant, 5-10 parts nano silica dispersion, 10-30 parts modified hydrophilic silica sol, 5-10 parts nano magnesium oxide, 5-10 parts nano barium sulfate, 5-10 parts 600-800 mesh barium sulfate, 10-20 parts 200-300 mesh second modified foaming clay mixture, 5-10 parts covering polymer, 1-5 parts lithium water glass, 1-2 parts nano aerogel slurry, 1-2 parts borax, and 0.5-3 parts thickener.

[0012] Preferably, in the base coat, the weight ratio of component A to component B is 1:3.1-3.2.

[0013] Preferably, the preparation method of the first modified foamed clay mixture includes: mixing 45-55 parts by weight of clay, 3-8 parts by weight of steel slag powder, 3-8 parts by weight of lime powder, 0.5-2 parts by weight of 1-2 mm rice straw fiber, 0.5-2 parts by weight of 1-2 mm bamboo fiber, and 3-8 parts by weight of 200-300 mesh wollastonite powder evenly; then adding 20-35 parts by weight of water, 3-8 parts by weight of polyvinyl alcohol adhesive, and 1-3 parts by weight of aluminum powder foaming agent and stirring evenly; adding micro-nano bubbles while stirring; after the aluminum powder foaming agent and lime powder have reacted, placing the resulting mixture in steam for two hours to expand and foam; and then drying and crushing to 80-100 mesh.

[0014] Preferably, the preparation method of the second modified foamed clay mixture includes: mixing 35-45 parts by weight of clay, 3-8 parts by weight of red brick powder, and 3-8 parts by weight of steel slag powder evenly, then adding 25-35 parts by weight of water and stirring evenly, then adding 3-8 parts by weight of 100-200 mesh barium sulfate, 1-3 parts by weight of sodium dodecyl sulfonate, 3-8 parts by weight of sodium silicate, 3-8 parts by weight of 100-200 mesh magnesium oxide, and 1-5 parts by weight of foamed microspheres and stirring evenly, adding micro-nano bubbles while stirring, and then drying and crushing to 200-300 mesh.

[0015] Preferably, the preparation method of the self-made foamed clay reinforcing agent includes: mixing and stirring the following raw materials in parts by weight evenly: 25-35 parts water, 1-3 parts sodium dodecyl sulfonate, 1-5 parts alumina, 3-8 parts potassium aluminum sulfate, 10-20 parts instant polyvinyl alcohol glue, 20-30 parts sodium silicate, 5-15 parts nano silica dispersion, and 5-15 parts clay-stabilizing agent.

[0016] Preferably, the method for preparing the modified sawdust particles includes: adding sawdust powder to a mixture of magnesium oxysulfate cement and sodium silicate, stirring evenly, and then crushing it to 80-100 mesh after curing and drying.

[0017] Preferably, the nano-magnesium oxide dispersion contains nano-magnesium oxide particles with a diameter of 60-80 nanometers and a content of 10%; the nano-barium sulfate dispersion contains nano-barium sulfate particles with a diameter of 100-200 nanometers and a content of 10%; the wollastonite powder has a mesh size of 600-800 mesh; the needle-shaped calcium silicate fiber powder has a mesh size of 200-325 mesh; the lightly calcined magnesium oxide powder has an active content ≥85% and a mesh size of 200-325 mesh; and the barium sulfate has a mesh size of 400-600 mesh.

[0018] A method for preparing the diffuse reflection anti-condensation sound-absorbing coating that can protect eyesight includes the following steps:

[0019] S1. Preparation of the base coat A component: According to the formula, add magnesium sulfate, nano magnesium oxide dispersion, nano barium sulfate dispersion and self-made foaming clay reinforcing agent to water in sequence, and mix and stir evenly;

[0020] S2. Preparation of component B of the base coat: Mix wollastonite powder, needle-shaped calcium silicate fiber powder, barium sulfate, lightly calcined magnesium oxide powder, modified sawdust particles, first modified foamed clay mixture, and second modified foamed clay mixture evenly according to the formula.

[0021] S3. Preparation of topcoat: According to the formula, add dispersant, modified hydrophilic silica sol, borax, nano magnesium oxide dispersion, nano barium sulfate dispersion, lithium water glass, 600-800 mesh barium sulfate, second modified foaming clay mixture, covering polymer, nano aerogel slurry, and thickener to water in sequence, and mix and stir evenly.

[0022] In this invention, magnesium sulfate in component A reacts with lightly calcined magnesium oxide in component B to form magnesium sulfate-oxygenated cement crystals, which improves hardness, bonding strength, and fire resistance. Alumina can also undergo a secondary reaction with unreacted calcium hydroxide in the clay mixture, forming small hollow microparticles with a microporous structure. Sodium silicate and modified hydrophilic silica sol adsorb onto the clay mixture, forming a network structure. The steel slag powder contains iron oxide, calcium oxide, silica, and alumina, which can undergo ion exchange with clay particles. Through the above physicochemical reactions, the underlying coating can form a three-dimensional network porous structure, exhibiting strong moisture absorption, leak-proof properties, and thermal insulation and fireproofing effects. Furthermore, silica sol, polyvinyl alcohol, and water glass can increase the adhesion strength and tensile strength of the coating. Using nano-magnesium oxide, nano-barium sulfate, ordinary barium sulfate, magnesium oxide, masking agents, and nano-aerogel can significantly improve the diffuse reflectance of the coating. Borax in the fabric can react with polyvinyl alcohol in the base material to form a gel, increasing the adhesion strength. Nano-silica can also play a role in matting and absorbing harmful light. The modified hydrophilic silica sol lithium water glass used in the fabric as film-forming materials has good air permeability after film formation, does not affect the moisture absorption and drying of the underlying coating, and can also improve the diffuse reflectance of the coating. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be described in detail below with reference to the embodiments. However, the scope of protection of this invention is not limited to the following embodiments.

[0024] Example 1

[0025] This embodiment provides a diffuse reflection anti-condensation sound-absorbing coating that can protect eyesight and its preparation method.

[0026] Undercoat: The weight ratio of component A to component B is 1:3.1.

[0027] Component A (parts by weight): 30 parts water, 55 parts homemade foaming clay reinforcing agent, 5 parts nano magnesium oxide dispersion, 5 parts nano barium sulfate dispersion, and 5 parts magnesium sulfate.

[0028] Component B (parts by weight): 6 parts wollastonite powder, 7 parts needle-shaped calcium silicate fiber powder, 3 parts barium sulfate, 10 parts lightly calcined magnesium oxide powder, 4 parts modified sawdust particles, 50 parts 80-mesh first modified foamed clay mixture, and 20 parts 200-mesh second modified foamed clay mixture.

[0029] Topcoat (parts by weight): 27 parts water, 0.5 parts dispersant, 6 parts nano silica dispersion, 20 parts modified hydrophilic silica sol, 6 parts nano magnesium oxide, 6 parts nano barium sulfate, 10 parts 600 mesh barium sulfate, 11 parts 200 mesh second modified foaming clay mixture, 7 parts covering polymer (e.g., hollow acrylate emulsion polymer), 3 parts lithium water glass, 2 parts nano aerogel slurry, 1 part borax, 0.5 parts thickener.

[0030] The preparation method of the first modified foamed clay mixture includes: mixing 50 parts by weight of clay, 5 parts by weight of steel slag powder, 5 parts by weight of lime powder, 1 part by weight of 1.5 mm rice straw fiber, 1 part by weight of 1-2 mm bamboo fiber, and 5 parts by weight of 250 mesh wollastonite powder evenly; then adding 26 parts by weight of water, 5 parts by weight of polyvinyl alcohol glue, and 2 parts by weight of aluminum powder foaming agent and stirring evenly; adding micro-nano bubbles while stirring; after the aluminum powder foaming agent and lime powder have reacted, placing the resulting mixture in steam for two hours to expand and foam; and then drying and crushing to 90 mesh.

[0031] The preparation method of the second modified foamed clay mixture includes: mixing 40 parts by weight of clay, 5 parts by weight of red brick powder, and 5 parts by weight of steel slag powder evenly, then adding 30 parts by weight of water and stirring evenly, then adding 5 parts by weight of 100-200 mesh barium sulfate, 2 parts by weight of sodium dodecyl sulfonate, 5 parts by weight of sodium silicate, 5 parts by weight of 100-200 mesh magnesium oxide, and 3 parts by weight of foamed microspheres and stirring evenly, adding micro-nano bubbles while stirring, and then drying and crushing to 200-300 mesh.

[0032] The preparation method of the self-made foamed soil reinforcing agent includes: mixing and stirring the following raw materials in parts by weight evenly: 31 parts water, 2 parts sodium dodecyl sulfonate, 3 parts alumina, 5 parts potassium aluminum sulfate, 15 parts quick-dissolving polyvinyl alcohol glue, 25 parts sodium silicate, 10 parts nano silica dispersion, and 9 parts soil-fixing agent.

[0033] The method for preparing the modified sawdust particles includes: adding sawdust powder to a mixture of magnesium oxysulfate cement and sodium silicate, stirring evenly, and then crushing it to 80-100 mesh after curing and drying.

[0034] The nano-magnesium oxide dispersion contains 60-80 nanometers of nano-magnesium oxide particles with a content of 10%; the nano-barium sulfate dispersion contains 100-200 nanometers of nano-barium sulfate particles with a content of 10%; the wollastonite powder has a mesh size of 600-800 mesh; the needle-shaped calcium silicate fiber powder has a mesh size of 200-325 mesh; the lightly calcined magnesium oxide powder has an active content ≥85% and a mesh size of 200-325 mesh; and the barium sulfate has a mesh size of 400-600 mesh.

[0035] The method for preparing the diffuse reflection anti-condensation sound-absorbing coating that can protect eyesight includes the following steps:

[0036] S1. Preparation of the base coat A component: According to the formula, add magnesium sulfate, nano magnesium oxide dispersion, nano barium sulfate dispersion and self-made foaming clay reinforcing agent to water in sequence, and mix and stir evenly;

[0037] S2. Preparation of component B of the base coat: Mix wollastonite powder, needle-shaped calcium silicate fiber powder, barium sulfate, lightly calcined magnesium oxide powder, modified sawdust particles, first modified foamed clay mixture, and second modified foamed clay mixture evenly according to the formula.

[0038] S3. Preparation of topcoat: According to the formula, add dispersant, modified hydrophilic silica sol, borax, nano magnesium oxide dispersion, nano barium sulfate dispersion, lithium water glass, barium sulfate, second modified foaming clay mixture, covering polymer, nano aerogel slurry, and thickener to water in sequence, and mix and stir evenly.

[0039] S4. During construction, the A and B components of the base coat are mixed evenly in proportion and then applied to the substrate. After drying, the top coat is applied over the base coat.

[0040] Preparation and Application: Prepare the base coat components A and B, and the topcoat coating, respectively, according to the aforementioned methods. Mix the base coat components A and B thoroughly and apply them by roller onto a 30cm × 40cm cement slab to a thickness of approximately 1.5mm. After curing for 24 hours, apply the topcoat coating to a thickness of approximately 0.8mm and allow it to cure naturally for 7 days. Performance test results are shown in Table 1.

[0041] Example 2

[0042] This embodiment provides a coating with an alternative formulation.

[0043] Undercoat: The weight ratio of component A to component B is 1:3.2.

[0044] Component A (parts by weight): 32 parts water, 50 parts homemade foaming clay reinforcing agent, 6 parts nano magnesium oxide dispersion, 6 parts nano barium sulfate dispersion, and 6 parts magnesium sulfate.

[0045] Component B (parts by weight): 5 parts wollastonite powder, 6 parts needle-shaped calcium silicate fiber powder, 4 parts barium sulfate, 12 parts lightly calcined magnesium oxide powder, 2 parts modified sawdust particles, 52 parts 90-mesh first modified foamed clay mixture, and 22 parts 250-mesh second modified foamed clay mixture.

[0046] Topcoat (parts by weight): 27.6 parts water, 0.6 parts dispersant, 7 parts nano silica dispersion, 22 parts modified hydrophilic silica sol, 5 parts nano magnesium oxide, 7 parts nano barium sulfate, 6 parts 700 mesh barium sulfate, 12 parts 250 mesh second modified foaming clay mixture, 5 parts covering polymer, 4 parts lithium water glass, 1.5 parts nano aerogel slurry, 1.5 parts borax, 0.8 parts thickener.

[0047] The preparation method of the first modified foamed clay mixture includes: mixing 45 parts by weight of clay, 3 parts by weight of steel slag powder, 3 parts by weight of lime powder, 0.5 parts by weight of 1 mm rice straw fiber, 0.5 parts by weight of 1 mm bamboo fiber, and 3 parts by weight of 200 mesh wollastonite powder evenly; then adding 20 parts by weight of water, 3 parts by weight of polyvinyl alcohol glue, and 1 part by weight of aluminum powder foaming agent and stirring evenly; adding micro-nano bubbles while stirring; after the aluminum powder foaming agent and lime powder have reacted, placing the resulting mixture in steam for two hours to expand and foam; and then drying and crushing to 80 mesh.

[0048] The preparation method of the second modified foamed clay mixture includes: mixing 35 parts by weight of clay, 3 parts by weight of red brick powder, and 3 parts by weight of steel slag powder evenly, then adding 25 parts by weight of water and stirring evenly, then adding 3 parts by weight of 100-mesh barium sulfate, 1 part by weight of sodium dodecyl sulfonate, 3 parts by weight of sodium silicate, 3 parts by weight of 100-mesh magnesium oxide, and 1 part by weight of foamed microspheres and stirring evenly, adding micro-nano bubbles while stirring, and then drying and crushing to 200 mesh.

[0049] Preferably, the preparation method of the self-made foamed soil reinforcing agent includes: mixing and stirring the following raw materials in parts by weight evenly: 25 parts water, 1 part sodium dodecyl sulfonate, 1 part alumina, 3 parts potassium aluminum sulfate, 10 parts quick-dissolving polyvinyl alcohol glue, 20 parts sodium silicate, 5 parts nano silica dispersion, and 5 parts soil-fixing agent.

[0050] Preparation and application were the same as in Example 1. Performance test results are shown in Table 1.

[0051] Example 3

[0052] This embodiment provides yet another formulation of the coating.

[0053] Undercoat: The weight ratio of component A to component B is 1:3.4.

[0054] Component A (parts by weight): 21 parts water, 56 parts homemade foaming clay reinforcing agent, 8 parts nano magnesium oxide dispersion, 8 parts nano barium sulfate dispersion, and 7 parts magnesium sulfate.

[0055] Component B (parts by weight): 9 parts wollastonite powder, 9 parts needle-shaped calcium silicate fiber powder, 5 parts barium sulfate, 13 parts lightly calcined magnesium oxide powder, 1 part modified sawdust particles, 40 parts 100-mesh first modified foamed clay mixture, and 23 parts 300-mesh second modified foamed clay mixture.

[0056] Topcoat (parts by weight): 21 parts water, 0.7 parts dispersant, 9 parts nano silica dispersion, 18 parts modified hydrophilic silica sol, 9 parts nano magnesium oxide, 9 parts nano barium sulfate, 9 parts 800 mesh barium sulfate, 11 parts 300 mesh second modified foaming clay mixture, 6 parts covering polymer, 2 parts lithium water glass, 2 parts nano aerogel slurry, 2 parts borax, 1.3 parts thickener.

[0057] The preparation method of the first modified foamed clay mixture includes: mixing 55 parts by weight of clay, 8 parts by weight of steel slag powder, 8 parts by weight of lime powder, 2 parts by weight of 2mm rice straw fiber, 2 parts by weight of 2mm bamboo fiber, and 8 parts by weight of 300-mesh wollastonite powder evenly; then adding 35 parts by weight of water, 8 parts by weight of polyvinyl alcohol glue, and 3 parts by weight of aluminum powder foaming agent and stirring evenly; adding micro-nano bubbles while stirring; after the aluminum powder foaming agent and lime powder have reacted, placing the resulting mixture in steam for two hours to expand and foam; and then drying and crushing to 100 mesh.

[0058] The preparation method of the second modified foamed clay mixture includes: mixing 45 parts by weight of clay, 8 parts by weight of red brick powder, and 8 parts by weight of steel slag powder evenly, then adding 35 parts by weight of water and stirring evenly, then adding 8 parts by weight of 200-mesh barium sulfate, 3 parts by weight of sodium dodecyl sulfonate, 8 parts by weight of sodium silicate, 8 parts by weight of 200-mesh magnesium oxide, and 5 parts by weight of foamed microspheres and stirring evenly, adding micro-nano bubbles while stirring, and then drying and crushing to 300 mesh.

[0059] The preparation method of the self-made foamed soil reinforcing agent includes: mixing and stirring the following raw materials in parts by weight evenly: 35 parts water, 3 parts sodium dodecyl sulfonate, 5 parts alumina, 8 parts potassium aluminum sulfate, 20 parts quick-dissolving polyvinyl alcohol glue, 30 parts sodium silicate, 15 parts nano silica dispersion, and 15 parts soil-fixing agent.

[0060] Preparation and application were the same as in Example 1. Performance test results are shown in Table 1.

[0061] Performance testing

[0062] Comparative Example 1 (commercially available diffuse reflection coating), Comparative Example 2 (commercially available sound-absorbing coating), and Comparative Example 3 (commercially available anti-condensation primer + commercially available sound-absorbing topcoat) were compared with Examples 1, 2, and 3. Tests were conducted according to the relevant national standards, and the results are shown in Table 1.

[0063] Table 1 Comparison of Performance Test Results

[0064] Testing items Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Comparative Example 3 Anti-condensation properties There are no water droplets on the surface and no dampness. There are no water droplets on the surface and no dampness. There are no water droplets on the surface and no dampness. There are water droplets on the surface, indicating dampness. There are water droplets on the surface, indicating dampness. There are a few water droplets on the surface Moisture absorption (g / ㎡) 41.4 42.3 41.9 14.9 15.1 37.3 Diffuse reflectance (visible light) 95.14% 95.38% 95.22% 93.7% 87.9% 88.5% Sound absorption coefficient (250-1000Hz range) 0.52-0.79 0.56-0.83 0.53-0.81 0.32-0.46 0.41-0.73 0.44-0.75

[0065] Test method description:

[0066] Anti-condensation test: Place the cement board (30cm×40cm, total coating thickness about 1.5-2.3mm) coated with the test coating in a sealed container, continuously pass water vapor through it, and take it out after 24 hours to observe the condensation and dampness on the surface.

[0067] Moisture absorption test: According to the conventional moisture absorption test method in this field, the sample dried to constant weight is placed in an environment of 23°C and 80% relative humidity for 12 hours to absorb moisture, and then placed in an environment of 23°C and 30% relative humidity for 12 hours to release moisture, and the moisture absorption is calculated.

[0068] Diffuse reflectance (visible light): The diffuse reflectance in the visible light band (380-780nm) is measured using the integrating sphere method according to ISO 9050-2003 standard.

[0069] Sound absorption coefficient test: According to GB / T20247-2006 "Acoustic Reverberation Chamber Sound Absorption Measurement" standard, the sound absorption coefficient range at three frequencies of 250Hz, 500Hz and 1000Hz was tested in the reverberation chamber.

[0070] As can be seen from Table 1, the overall performance of the coating of the present invention is significantly better than that of single-function products and simple composite products on the market, achieving synergistic gains of high diffuse reflection, efficient anti-condensation and high sound absorption and noise reduction.

Claims

1. A diffuse reflection anti-condensation sound-absorbing coating that protects eyesight, characterized in that, Includes primer and topcoat; The underlying coating is a two-component coating, consisting of component A and component B, with a weight ratio of component A to component B of 1:3-3.

5. The A component is made from the following raw materials in parts by weight: 30-40 parts water, 50-60 parts self-made foaming clay reinforcing agent, 5-10 parts nano magnesium oxide dispersion, 5-10 parts nano barium sulfate dispersion, and 5-8 parts magnesium sulfate. The B component is made from the following raw materials in parts by weight: 5-10 parts wollastonite powder, 5-10 parts needle-shaped calcium silicate fiber powder, 3-5 parts barium sulfate, 10-15 parts lightly calcined magnesium oxide powder, 1-5 parts modified sawdust particles, 40-60 parts of 80-100 mesh first modified foamed clay mixture, and 10-30 parts of 200-300 mesh second modified foamed clay mixture. The topcoat is made from the following raw materials in parts by weight: 20-40 parts water, 0.5-1 parts dispersant, 5-10 parts nano silica dispersion, 10-30 parts modified hydrophilic silica sol, 5-10 parts nano magnesium oxide, 5-10 parts nano barium sulfate, 5-10 parts 600-800 mesh barium sulfate, 10-20 parts 200-300 mesh second modified foaming clay mixture, 5-10 parts covering polymer, 1-5 parts lithium water glass, 1-2 parts nano aerogel slurry, 1-2 parts borax, and 0.5-3 parts thickener.

2. The diffuse reflection anti-condensation sound-absorbing coating for protecting eyesight according to claim 1, characterized in that, In the underlying coating, the weight ratio of component A to component B is 1:3.1-3.

2.

3. The diffuse reflection anti-condensation sound-absorbing coating for protecting eyesight according to claim 1, characterized in that, The preparation method of the first modified foamed clay mixture includes: mixing 45-55 parts by weight of clay, 3-8 parts by weight of steel slag powder, 3-8 parts by weight of lime powder, 0.5-2 parts by weight of 1-2 mm rice straw fiber, 0.5-2 parts by weight of 1-2 mm bamboo fiber, and 3-8 parts by weight of 200-300 mesh wollastonite powder evenly; then adding 20-35 parts by weight of water, 3-8 parts by weight of polyvinyl alcohol glue, and 1-3 parts by weight of aluminum powder foaming agent and stirring evenly; adding micro-nano bubbles while stirring; after the aluminum powder foaming agent and lime powder have reacted, placing the resulting mixture in steam for two hours to expand and foam; and then drying and crushing to 80-100 mesh.

4. The diffuse reflection anti-condensation sound-absorbing coating for protecting eyesight according to claim 1, characterized in that, The preparation method of the second modified foamed clay mixture includes: mixing 35-45 parts by weight of clay, 3-8 parts by weight of red brick powder, and 3-8 parts by weight of steel slag powder evenly, then adding 25-35 parts by weight of water and stirring evenly, then adding 3-8 parts by weight of 100-200 mesh barium sulfate, 1-3 parts by weight of sodium dodecyl sulfonate, 3-8 parts by weight of sodium silicate, 3-8 parts by weight of 100-200 mesh magnesium oxide, and 1-5 parts by weight of foamed microspheres and stirring evenly, adding micro-nano bubbles while stirring, and then drying and crushing to 200-300 mesh.

5. The diffuse reflection anti-condensation sound-absorbing coating for protecting eyesight according to claim 1, characterized in that, The preparation method of the self-made foamed soil reinforcing agent includes: mixing and stirring the following raw materials in parts by weight evenly: 25-35 parts water, 1-3 parts sodium dodecyl sulfonate, 1-5 parts alumina, 3-8 parts potassium aluminum sulfate, 10-20 parts quick-dissolving polyvinyl alcohol glue, 20-30 parts sodium silicate, 5-15 parts nano silica dispersion, and 5-15 parts soil-fixing agent.

6. The diffuse reflection anti-condensation sound-absorbing coating for protecting eyesight according to claim 1, characterized in that, The method for preparing the modified sawdust particles includes: adding sawdust powder to a mixture of magnesium oxysulfate cement and sodium silicate, stirring evenly, and then crushing it to 80-100 mesh after curing and drying.

7. The diffuse reflection anti-condensation sound-absorbing coating for protecting eyesight according to claim 1, characterized in that, The nano-magnesium oxide dispersion contains 60-80 nanometers of nano-magnesium oxide particles with a content of 10%; the nano-barium sulfate dispersion contains 100-200 nanometers of nano-barium sulfate particles with a content of 10%.

8. The diffuse reflection anti-condensation sound-absorbing coating for protecting eyesight according to claim 1, characterized in that, The wollastonite powder has a mesh size of 600-800; the needle-shaped calcium silicate fiber powder has a mesh size of 200-325.

9. The diffuse reflection anti-condensation sound-absorbing coating for protecting eyesight according to claim 1, characterized in that, The lightly calcined magnesium oxide powder has an active content of ≥85% and a mesh size of 200-325; the barium sulfate has a mesh size of 400-600.

10. A method for preparing a diffuse reflection anti-condensation sound-absorbing coating that protects eyesight according to any one of claims 1-9, characterized in that, Includes the following steps: S1. Preparation of the base coat A component: According to the formula, add magnesium sulfate, nano magnesium oxide dispersion, nano barium sulfate dispersion and self-made foaming clay reinforcing agent to water in sequence, and mix and stir evenly; S2. Preparation of component B of the base coat: Mix wollastonite powder, needle-shaped calcium silicate fiber powder, barium sulfate, lightly calcined magnesium oxide powder, modified sawdust particles, first modified foamed clay mixture, and second modified foamed clay mixture evenly according to the formula. S3. Preparation of topcoat: According to the formula, add dispersant, modified hydrophilic silica sol, borax, nano magnesium oxide dispersion, nano barium sulfate dispersion, lithium water glass, 600-800 mesh barium sulfate, second modified foaming clay mixture, covering polymer, nano aerogel slurry, and thickener to water in sequence, and mix and stir evenly.