Anti-condensation fireproof coating and preparation method thereof

Abstract

The invention relates to the technical field of building decoration coatings, discloses an anti-condensation fireproof interior wall coating and a preparation method thereof, and aims to solve the problem of poor fireproof performance of an existing anti-condensation coating. The coating is a three-component system of a component A, a component B and a component C in a weight mixing ratio of 1: (2.5-3.5): (0.5-1), the component A contains a water electrolyte and a fireproof emulsion, the component B contains a modified soil mixture and a plurality of flame-retardant and reinforcing components, and the component C contains a self-made fireproof reinforcing agent; porous modified soil, flame-retardant rice husks, anti-crack loofah sponge fibers and other key components are prepared through a specific modification technology, and the three components are mixed and then subjected to a chemical reaction to form a three-dimensional net-shaped porous structure. The coating has excellent anti-condensation performance (the moisture absorption capacity reaches 37.2-37.8 m < 2 > / g, and no moisture regain water drops) and fireproof performance (the coating does not burn and fall off within 3 hours at the temperature of 600 DEG C), is high in cracking resistance and tensile bonding strength (0.53-0.56 MPa), and is suitable for interior wall decoration in humid areas.

Description

Technical Field

[0001] This invention relates to the field of building decoration coatings technology, specifically to a fire-retardant interior wall coating that prevents condensation and its preparation method. Background Technology

[0002] "The return of spring" is a seasonal humid phenomenon unique to southern my country. In this environment, warm, humid air condenses on cooler walls, forming water droplets (condensation). Condensation not only causes dampness and pollution on indoor surfaces but also makes stored items damp and more prone to mold growth, seriously affecting the living environment and human health.

[0003] To address the condensation problem, anti-condensation coatings have been developed in existing technologies. However, these coatings generally suffer from insufficient fire resistance: most anti-condensation coatings use polymer emulsions or natural clay as base materials, which are highly flammable. In the event of a fire, they cannot form an effective fire barrier, easily leading to the spread of fire and seriously threatening people's lives and property. Therefore, developing an interior wall coating that combines excellent anti-condensation and fire resistance properties has become an urgent need in the building decoration industry. Summary of the Invention

[0004] To address the shortcomings of existing anti-condensation coatings in terms of poor fire resistance, the core of this invention is to provide a coating system with three components working synergistically, which forms a composite function of "porous moisture absorption, fire retardancy, and crack resistance enhancement" through the physicochemical reactions between the components.

[0005] The technical solution of the present invention:

[0006] This invention provides a fire-retardant interior wall coating that prevents condensation, comprising component A, component B, and component C, wherein the weight mixing ratio of components A, B, and C is 1:2.5-3.5:0.5-1; component A, by weight, comprises: 70-80 parts water, 5-10 parts magnesium sulfate, 5-10 parts ammonium dihydrogen phosphate, and 5-10 parts fire-retardant chlorine-based emulsion; component B, by weight, comprises: 70-80 parts modified clay mixture, 1-1.5 parts sodium hexametaphosphate, 3-5 parts mica powder, 5-10 parts lightly calcined magnesia powder, 5-8 parts aluminum hydroxide powder, 5-10 parts red brick powder particles, 2-3 parts calcium chloride powder, 2-3 parts modified loofah fiber, 2-3 parts high-alumina cement, and 1-2 parts borax; component C, by weight, comprises: 3 parts water, 70-80 parts magnesium sulfate, 5-1.5 parts sodium hexametaphosphate, 3-5 parts mica powder, 5-10 parts lightly calcined magnesia powder, 5-8 parts aluminum hydroxide powder, 5-10 parts red brick powder particles, 2-3 parts calcium chloride powder, 2-3 parts modified loofah fiber, 2-3 parts high-alumina cement, and 1-2 parts borax; component C, by weight, comprises: 3 parts water, 5 parts magnesium sulfate, 5-1.5 parts magnesium sulfate, 5-1.5 parts sodium hexametaphosphate, 5-1.5 parts sodium hexametaphosphate, 5-1.5 parts sodium hexametaphosphate, 5-1.5 parts sodium hexametaphosphate, 5-1.5 parts magnesium sulfate, 5-1.5 parts magnesium sulfate, 5-1.5 parts magnesium sulfate, 5-1.5 parts magnesium sulfate, 5-1.5 parts magnesium sulfate, 5-1. 0-40 parts, self-made soil-modified fire-retardant reinforcing agent 60-70 parts; the modified soil mixture by weight includes: 65-75 parts dry soil, 15-25 parts quicklime water with a mass concentration of 10%-20%, 3-7 parts sodium alginate, 8-12 parts calcium silicate fiber powder, 2-4 parts expanded perlite particles, 3-7 parts modified rice husk, 1.5-2.5 parts aluminum powder foaming agent, and 2-4 parts potassium aluminum sulfate; the modified rice husk by weight includes: 90-110 parts rice husk and 150-200 parts magnesium oxychloride cement slurry; the self-made soil-modified fire-retardant reinforcing agent by weight includes: 55-65 parts water, 18-22 parts hydrophilic modified silica sol, 8-12 parts polyvinyl alcohol glue, and 8-12 parts fire-retardant vinyl acetate-acrylic emulsion.

[0007] According to one embodiment of the present invention, the method for preparing the red brick powder particles is as follows: soaking red bricks in lime water with a concentration of 15-25% for 1-3 hours, drying them, and then pulverizing them into particles of 80-90 mesh.

[0008] According to one embodiment of the present invention, the modified loofah fiber is prepared by cutting the loofah into 15-20 mm long segments, soaking them in a lithium water glass solution with a modulus of 0.8-1.2 for 45 minutes to 1.5 hours, and then drying them to make fibers with a length of 1.5-3 mm.

[0009] According to one embodiment of the present invention, component B further includes 1-2 parts by weight of color powder.

[0010] According to one embodiment of the present invention, the mica powder in component B is 300-350 mesh, the lightly calcined magnesium oxide powder is 200-300 mesh, the aluminum hydroxide powder is 300-400 mesh, and the calcium chloride powder is 200-300 mesh.

[0011] According to one embodiment of the present invention, the soil is one or a mixture of two of the following: yellow clay and clay.

[0012] According to one embodiment of the present invention, the activity of the lightly calcined magnesium oxide powder is not less than 65%.

[0013] According to one embodiment of the present invention, the high-alumina cement is 425 type high-alumina cement.

[0014] This invention also provides a method for preparing the fire-retardant interior wall coating with anti-condensation properties, comprising the following steps: Step 1: Mixing component A evenly according to the weight proportions; Step 2: Preparing component B: 2.1 Preparing the modified clay mixture: First, take 65-75 parts of dry clay, add 15-25 parts of quicklime water with a concentration of 10%-20%, and stir at a speed of 300-500 rpm for 10-15 minutes until the mixture is free of lumps; then add 3-7 parts of sodium alginate and 8-12 parts of 325 mesh silicate in sequence. Add calcium fiber powder, 2-4 parts expanded perlite granules, and 3-7 parts modified rice husks, and continue stirring for 15-20 minutes to ensure uniform mixing. Then add 1.5-2.5 parts aluminum powder foaming agent and 2-4 parts potassium aluminum sulfate, adjust the speed to 200-300 rpm, and stir for 25-35 minutes to ensure sufficient foaming and formation of porous microparticles. Finally, dry the mixture at 60-80℃ for 4-6 hours, pulverize it, and pass it through an 80-100 mesh sieve to obtain the modified soil mixture. The modified rice husks... The modification method is as follows: 1. Add rice husks to magnesium oxychloride cement slurry, allowing the slurry to completely coat the rice husks. After drying, pulverize into 20-40 mesh particles; 2.2 Prepare red brick powder particles; 2.3 Prepare modified loofah fiber; 2.4 Take 70-80 parts by weight of modified soil mixture, 1-1.5 parts of sodium hexametaphosphate, 3-5 parts of 325 mesh mica powder, 5-10 parts of 200-300 mesh lightly calcined magnesium oxide powder, 5-8 parts of 300-400 mesh aluminum hydroxide powder, and 5-10 parts of red brick powder. The ingredients are: granules, 2-3 parts of 200-300 mesh calcium chloride powder, 2-3 parts of modified loofah fiber, 2-3 parts of high-alumina cement, 1-2 parts of color powder, and 1-2 parts of borax, mixed evenly; Step 3: Preparation of component C: Take 30-40 parts of water and 60-70 parts of self-made clay-modified fire-retardant reinforcing agent by weight, and stir evenly; the self-made clay-modified fire-retardant reinforcing agent is prepared by mixing 55-65 parts of water, 18-22 parts of hydrophilic modified silica sol, 8-12 parts of polyvinyl alcohol glue, and 8-12 parts of fire-retardant vinyl acetate-acrylic emulsion.

[0015] According to one embodiment of the present invention, step 4 is included: mixing and using: pouring component B into component A and stirring evenly, reacting for 20-30 minutes, then adding component C and stirring evenly to obtain a coating that can be sprayed or scraped.

[0016] Mechanism of action of this invention:

[0017] I. Anti-condensation mechanism: After the three components are mixed, a three-dimensional porous network structure is formed through the reaction of calcium chloride and sodium alginate and the cross-linking of polyvinyl alcohol and borax. This structure can quickly adsorb water vapor in the air (moisture absorption capacity of 37.2-37.8㎡ / g). When condensation occurs on the wall surface due to temperature difference, the moisture is adsorbed by the porous structure, preventing condensation on the surface. When the ambient humidity decreases, the adsorbed moisture is slowly released, keeping the coating film dry, thus achieving anti-condensation in a cycle.

[0018] II. Fire prevention mechanism:

[0019] The chemical reaction produces fire-resistant cement: Component A, magnesium sulfate and ammonium dihydrogen phosphate, react with component B, lightly calcined magnesium oxide, to produce high-temperature resistant magnesium sulfate cement (resistant to 800℃) and magnesium phosphate cement (resistant to 1000℃).

[0020] Synergistic effect of flame retardant components: Aluminum hydroxide (endothermic decomposition at high temperature), high-alumina cement (high-temperature resistant skeleton), and mica powder (forming a fireproof isolation layer) in component B work together to inhibit combustion;

[0021] Flame retardant coating: Fire-retardant chlorovinylidene emulsion of component A and fire-retardant vinyl acetate emulsion of component C coat modified rice husks, loofah fibers and other flammable components, turning them into non-flammable materials;

[0022] Anti-cracking mechanism: Modified loofah fiber, calcium silicate fiber powder, and red brick powder particles form a "fiber-particle" composite skeleton, which, together with the modified silica sol, enhances the bonding strength and ensures no cracking when the coating is thick (0.2cm).

[0023] The beneficial effects of this invention are:

[0024] Compared with the prior art, the present invention has the following significant advantages:

[0025] I. Excellent anti-condensation performance: According to the anti-condensation test (sealed container with water vapor for 24 hours), there are no water droplets or dampness on the coating surface, and the moisture absorption is 2.7-2.8 times that of fire-retardant coatings on the market;

[0026] II. Fire resistance meets standards: According to GB12441-2018 "Fire-retardant Coatings for Decorative Surfaces", it does not burn, peel off, or crack after 3 hours at 600℃.

[0027] III. Stable mechanical properties: Tensile bond strength reaches 0.53-0.56MPa (compliant with JC / T2078-2011 standard), and there is no cracking even with a 0.2cm thick coating, solving the problem of cracking when the coating is thick in traditional clay coatings;

[0028] IV. Environmental Protection and Economic Efficiency: The use of waste red bricks, rice husks and other raw materials reduces costs and solid waste pollution; the raw materials are all conventional building materials, which are easy to purchase and suitable for large-scale production.

[0029] V. Antibacterial and antifungal: The high temperature generated by the reaction of quicklime water and aluminum powder can kill microorganisms in soil and rice husks. Combined with the air permeability of the porous structure, it effectively inhibits the growth of mold (complies with GB / T1741-2020 antibacterial and antifungal standards).

[0030] The preferred embodiments of the present invention and their beneficial effects will be further described in detail with reference to specific implementation methods. Detailed Implementation

[0031] The following provides a detailed description of specific embodiments of the present invention. It should be understood that the specific embodiments described herein are for illustrative and explanatory purposes only and are not intended to limit the scope of the invention.

[0032] I. Example 1

[0033] Coating composition (weight mixing ratio A:B:C = 1:2.8:0.5)

[0034] Component A (100 parts liquid): 78 parts water, 8 parts magnesium sulfate, 6 parts ammonium dihydrogen phosphate, 8 parts fire-retardant vinylidene chloride emulsion; the fire-retardant vinylidene chloride emulsion is a terpolymer emulsion of vinyl chloride-vinylidene chloride-phosphate ester with a solid content of 40-45%, commercially available model XJ-801.

[0035] Component B (280 parts powder): 70 parts modified clay mixture, 1 part sodium hexametaphosphate, 3 parts 325 mesh mica powder, 6 parts 250 mesh light-burned magnesia powder, 6 parts 260 mesh aluminum hydroxide powder, 6 parts 85 mesh red brick powder particles, 2 parts 250 mesh calcium chloride powder, 2 parts modified loofah fiber, 2 parts 425 type high-alumina cement, 1 part color powder, 1 part borax.

[0036] Component C (50 parts liquid): 40 parts water, 60 parts self-made clay-modified fire retardant and reinforcing agent;

[0037] Preparation steps

[0038] A method for preparing the above-mentioned anti-condensation fire-retardant interior wall coating, characterized by comprising the following steps:

[0039] Step 1: Mix component A evenly according to the weight parts;

[0040] Step 2: Preparation of component B:

[0041] 2.1 Preparation of modified soil mixture: First, take 70 parts of dry soil, add 20 parts of 15% lime water, and stir at 400 rpm for 12 minutes until the mixture is free of lumps; then add 6 parts of sodium alginate, 10 parts of 325-mesh calcium silicate fiber powder, 3 parts of expanded perlite granules, and 5 parts of modified rice husks in sequence, and continue stirring for 18 minutes to ensure that all components are mixed evenly; then add 2 parts of aluminum powder foaming agent and 3 parts of potassium aluminum sulfate, and adjust the stirring speed to 260 rpm. Stir for 30 minutes to ensure sufficient foaming and formation of porous microparticles; finally, dry the mixture at 70℃ for 5 hours, pulverize it, and pass it through a 90-mesh sieve to obtain the modified soil mixture; the modification method of the modified rice husk is as follows: add rice husk to magnesium oxychloride cement slurry, allowing the magnesium oxychloride cement slurry to completely coat the rice husk, dry it, and then pulverize it into 30-mesh (20-40 mesh optional) particles. The modified rice husk will not burn at high temperatures of 500-800 degrees Celsius.

[0042] 2.2 Preparation of red brick powder particles: Soak red bricks in 20% lime water for 2 hours, dry them and then crush them into 85-mesh particles.

[0043] 2.3 Preparation of modified loofah fiber: Loofah was cut into 18mm long segments, soaked in lithium water glass solution with a modulus of 1 for 1 hour, and then dried to make 2mm long fibers.

[0044] 2.4 Take 75 parts by weight of modified clay mixture, 1 part of sodium hexametaphosphate, 4 parts of 325 mesh mica powder, 7 parts of 250 mesh light calcined magnesium oxide powder, 6 parts of 350 mesh aluminum hydroxide powder, 7 parts of red brick powder particles, 2 parts of 260 mesh calcium chloride powder, 3 parts of modified loofah fiber, 2 parts of high alumina cement, 1 part of color powder, and 1 part of borax, and mix them evenly.

[0045] Step 3: Preparation of Component C: Take 35 parts by weight of water and 65 parts by weight of self-made clay-modified fire retardant reinforcing agent, and stir evenly; the self-made clay-modified fire retardant reinforcing agent is prepared by mixing 60 parts by weight of water, 20 parts by weight of hydrophilic modified silica sol, 10 parts by weight of polyvinyl alcohol adhesive, and 10 parts by weight of fire-retardant vinyl acetate-acrylic emulsion. The hydrophilic modified silica sol can be purchased from commercially available conventional hydrophilic modified silica sol, model SY-30, with a solid content of 25-30%, a particle size of 10-20 nm, and a pH value of 8-9.

[0046] Step 4: Mixing and using: Pour component B into component A and stir well. After reacting for 25 minutes, add component C and stir well to obtain a paint that can be sprayed or scraped.

[0047] Apply the paint to the wall, with a dry film thickness of 0.2cm, and allow it to cure naturally for 7 days.

[0048] II. Example 2

[0049] Coating composition (weight mixing ratio A:B:C = 1:3:0.8)

[0050] Component A (100 parts): 80 parts water, 10 parts magnesium sulfate, 5 parts ammonium dihydrogen phosphate, and 5 parts fire-retardant chlorine-vinylidene emulsion;

[0051] Component B (300 parts): 75 parts modified clay mixture, 1.5 parts sodium hexametaphosphate, 4 parts 325 mesh mica powder, 7 parts 300 mesh light-burned magnesia powder, 7 parts 360 mesh aluminum hydroxide powder, 5 parts 90 mesh red brick powder particles, 3 parts 200 mesh calcium chloride powder, 2.5 parts modified loofah fiber, 2.5 parts 425 type high-alumina cement, 1.5 parts color powder, 1.5 parts borax;

[0052] Component C (80 parts): 35 parts water, 65 parts homemade clay-modified fire retardant and reinforcing agent;

[0053] Preparation steps: Same as in Example 1, apply the paint to the wall with a dry film thickness of 0.2cm, and allow it to cure naturally for 7 days.

[0054] III. Comparative Example 1 (Two-component unmodified coating)

[0055] Composition: A (30 parts water + 70 parts polyvinyl alcohol adhesive), B (70 parts yellow clay + 1 part sodium hexametaphosphate + 4 parts 325 mesh mica powder + 5 parts 200 mesh lightly calcined magnesia powder + 5 parts 300-400 mesh aluminum hydroxide powder + 5 parts red brick powder particles + 2 parts high-alumina cement + 1 part color powder + 1 part borax + 4 parts unmodified rice husk powder + 2 parts unmodified loofah fiber).

[0056] Preparation: Mix component A and component B at a ratio of 1:2.8, apply the paint to the wall, dry film thickness 0.2cm, and allow to cure naturally for 7 days.

[0057] IV. Comparative Example 2 (Commercially Available Decorative Fire-Retardant Coating)

[0058] Purchase commercially available standard decorative fire-retardant coatings, apply the coating to the wall with a dry film thickness of 0.2cm, and allow it to cure naturally for 7 days.

[0059] V. Performance Testing

[0060] The samples from Examples 1 and 2 and Comparative Examples 1 and 2 were tested according to the following standards, and the results are shown in the table below:

[0061]

[0062] Moisture-proof condensation test method: Place the above finished board in a relatively sealed container, continuously add water vapor to the container, take it out and observe after 24 hours, and check whether there are water droplets on the surface;

[0063] Test method for crack resistance: manual observation;

[0064] The test standard for tensile bond strength is JC / T2078-2011;

[0065] The standard for testing thermal conductivity is GB / T10294-2008;

[0066] The test method for moisture absorption: referring to the international standard ISO24353-2008 and the NORDTEST test, the sample dried to constant weight was placed in a constant temperature and humidity chamber. The ambient temperature and relative humidity were set to 23℃ and 30%, respectively. This process lasted for 24 hours, allowing the sample to absorb moisture at 80% relative humidity for 12 hours, and then release moisture at 30% RH for 12 hours.

[0067] Fire resistance test: according to the decorative fire-retardant coating (GB12441-2018).

[0068] VI. Results Analysis

[0069] Anti-condensation performance: Examples 1 and 2 and Comparative Example 1 showed no moisture absorption, but Examples 1 had significantly higher moisture absorption (37.2-37.8 vs 27.3), indicating that the porous structure was superior; Comparative Example 2 (commercially available fire-retardant coating) had extremely low moisture absorption and condensation occurred.

[0070] Fire resistance and crack resistance: Examples 1 and 2 are resistant to high temperature and do not crack. Comparative Example 1, due to the lack of modified fiber and soil, cracked and fell off at high temperature and the thick coating cracked. Although Comparative Example 2 has high bonding strength, it also partially fell off at high temperature.

[0071] Overall performance: The three-component coating of this invention achieves synergistic effects of "anti-condensation-fireproof-crack resistance", which is superior to two-component unmodified coatings and commercially available single-function coatings.

[0072] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A fire-retardant interior wall coating that prevents condensation, characterized in that, It includes component A, component B and component C, wherein the weight mixing ratio of component A, component B and component C is 1:2.5-3.5:0.5-1; Component A, by weight, comprises: 70-80 parts water, 5-10 parts magnesium sulfate, 5-10 parts ammonium dihydrogen phosphate, and 5-10 parts fire-retardant chlorine-vinylidene emulsion. Component B, by weight, comprises: 70-80 parts modified clay mixture, 1-1.5 parts sodium hexametaphosphate, 3-5 parts mica powder, 5-10 parts lightly calcined magnesia powder, 5-8 parts aluminum hydroxide powder, 5-10 parts red brick powder particles, 2-3 parts calcium chloride powder, 2-3 parts modified loofah fiber, 2-3 parts high-alumina cement, and 1-2 parts borax. The C component, by weight, comprises: 30-40 parts water and 60-70 parts self-made clay-modified fire-retardant reinforcing agent; The modified soil mixture comprises, by weight, 65-75 parts of dry soil, 15-25 parts of quicklime water with a mass concentration of 10%-20%, 3-7 parts of sodium alginate, 8-12 parts of calcium silicate fiber powder, 2-4 parts of expanded perlite particles, 3-7 parts of modified rice husks, 1.5-2.5 parts of aluminum powder foaming agent, and 2-4 parts of potassium aluminum sulfate. The modified rice husk comprises, by weight: 90-110 parts rice husk and 150-200 parts magnesium oxychloride cement slurry; The self-made clay-modified fire-retardant enhancer comprises, by weight: 55-65 parts water, 18-22 parts hydrophilic modified silica sol, 8-12 parts polyvinyl alcohol adhesive, and 8-12 parts fire-retardant vinyl acetate-acrylic emulsion.

2. The fire-retardant interior wall coating for preventing condensation according to claim 1, characterized in that, The method for preparing the red brick powder particles is as follows: soak red bricks in lime water with a concentration of 15-25% for 1-3 hours, dry them, and then crush them into particles of 80-90 mesh.

3. The fire-retardant interior wall coating for preventing condensation according to claim 1, characterized in that, The modified loofah fiber is prepared by cutting the loofah into 15-20mm long segments, soaking them in a lithium water glass solution with a modulus of 0.8-1.2 for 45 minutes to 1.5 hours, and then drying them to make fibers 1.5-3mm long.

4. The fire-retardant interior wall coating for preventing condensation according to claim 1, characterized in that, Component B also includes 1-2 parts by weight of colorant.

5. The fire-retardant interior wall coating for preventing condensation according to claim 1, characterized in that, The mica powder in component B is 300-350 mesh, the lightly calcined magnesium oxide powder is 200-300 mesh, the aluminum hydroxide powder is 300-400 mesh, and the calcium chloride powder is 200-300 mesh.

6. The fire-retardant interior wall coating for preventing condensation according to claim 1, characterized in that, The soil is one or a mixture of two types of clay, such as yellow clay or clay.

7. The fire-retardant interior wall coating for preventing condensation according to claim 1, characterized in that, The activity of the lightly calcined magnesium oxide powder is not less than 65%.

8. The fire-retardant interior wall coating for preventing condensation according to claim 1, characterized in that, The high-alumina cement is type 425 high-alumina cement.

9. A method for preparing a fire-retardant interior wall coating with anti-condensation properties according to any one of claims 1-8, characterized in that, Includes the following steps: Step 1: Mix component A evenly according to the weight parts; Step 2: Preparation of component B: 2.1 Preparation of modified soil mixture: First, take 65-75 parts of dry soil, add 15-25 parts of 10%-20% quicklime water, and stir at 300-500 rpm for 10-15 minutes until the mixture is free of lumps; then add 3-7 parts of sodium alginate, 8-12 parts of 325-mesh calcium silicate fiber powder, 2-4 parts of expanded perlite particles, and 3-7 parts of modified rice husks in sequence, and continue stirring for 15-20 minutes to ensure that all components are mixed evenly; then add 1.5-2... Mix 5 parts aluminum powder foaming agent and 2-4 parts potassium aluminum sulfate. Adjust the speed to 200-300 rpm and stir for 25-35 minutes to ensure sufficient foaming and formation of porous microparticles. Finally, dry the mixture at 60-80℃ for 4-6 hours, pulverize it, and pass it through an 80-100 mesh sieve to obtain the modified soil mixture. The modification method for rice husks is as follows: add rice husks to magnesium oxychloride cement slurry, allowing the magnesium oxychloride cement slurry to completely coat the rice husks, and then dry and pulverize them into 20-40 mesh particles. 2.2 Preparation of red brick powder particles; 2.3 Preparation of modified loofah fibers; 2.4 Take 70-80 parts by weight of modified clay mixture, 1-1.5 parts of sodium hexametaphosphate, 3-5 parts of 325-mesh mica powder, 5-10 parts of 200-300-mesh light-burned magnesia powder, 5-8 parts of 300-400-mesh aluminum hydroxide powder, 5-10 parts of red brick powder particles, 2-3 parts of 200-300-mesh calcium chloride powder, 2-3 parts of modified loofah fiber, 2-3 parts of high-alumina cement, 1-2 parts of color powder, and 1-2 parts of borax, and mix them evenly. Step 3: Preparation of component C: Take 30-40 parts by weight of water and 60-70 parts by weight of self-made clay-modified fire retardant and reinforcing agent, and stir evenly; the self-made clay-modified fire retardant and reinforcing agent is prepared by mixing 55-65 parts by weight of water, 18-22 parts by weight of hydrophilic modified silica sol, 8-12 parts by weight of polyvinyl alcohol glue, and 8-12 parts by weight of fire-retardant vinyl acetate-acrylic emulsion.

10. The method for preparing the anti-condensation fire-retardant interior wall coating according to claim 9, characterized in that, Step 4: Mixing and using: Pour component B into component A and stir evenly. After reacting for 20-30 minutes, add component C and stir evenly to obtain a coating that can be sprayed or scraped.

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