Environment-friendly fireproof coating

Abstract

The invention provides an environment-friendly fireproof coating, and relates to the technical field of fireproof materials, and the environment-friendly fireproof coating is prepared from the following raw materials: modified sodium water glass, acrylate emulsion, magnesium phosphate, hydrophobic silica aerogel, biomass charcoal, potassium titanate whisker, nano montmorillonite, cellulose, an organic silicon defoamer, a dispersant, a flame-retardant synergist, a preservative and deionized water. The acrylate emulsion is used as a film forming substance, deionized water is used as a solvent, emission of volatile organic compounds is reduced, and the modified sodium water glass, magnesium phosphate, hydrophobic silicon dioxide aerogel, biomass charcoal and the like are mostly inorganic or natural materials and have good environmental protection performance. The pollution to indoor and outdoor environments and the potential harm to human health are reduced, so that the environment-friendly coating has good environment-friendly performance.

Description

Technical Field

[0001] The present invention relates to the technical field of fireproof materials, in particular to an environmentally friendly fireproof coating. Background Art

[0002] In modern society, fire safety hazards remain a major threat to people's lives, property, and the safety of various facilities. With the vigorous development of industries such as construction, transportation, and energy, the demand for fire-retardant coatings is increasing, and at the same time, more stringent requirements are being placed on their performance.

[0003] Although traditional fire-retardant coatings have certain fire-proof capabilities, they only rely on a single fire-proof mechanism. Faced with increasingly complex fire scenarios and higher safety standards, their performance shortcomings are gradually highlighted. Under extreme conditions such as high temperature and prolonged burning, a single flame retardant is difficult to play a continuous and effective role, and cannot form a comprehensive and lasting fire barrier. In addition, a large amount of toxic and harmful gases will be released during the combustion process, which not only causes serious pollution to the environment, but also poses a threat to people's lives and safety. In addition, many traditional fire-retardant coatings use organic solvent-based film-forming substances. During the construction and use of the coating, a large amount of organic solvents will evaporate into the air, resulting in high VOCs emissions, further exacerbating the harm to the environment and human body. Summary of the Invention

[0004] The purpose of the present invention is to provide an environmentally friendly fire retardant coating to solve the technical problems existing in the prior art.

[0005] In order to achieve the above-mentioned object of the invention, the technical solution adopted by the present invention is:

[0006] The invention discloses an environmentally friendly fireproof coating comprising the following raw materials: modified sodium water glass, acrylic emulsion, magnesium phosphate, hydrophobic silica aerogel, biochar, potassium titanate whiskers, nano-montmorillonite, cellulose, organosilicon defoaming agent, dispersant, flame retardant synergist, preservative and deionized water.

[0007] Furthermore, the weight of the raw materials is: modified sodium water glass 150-400g, acrylic emulsion 100-300g, magnesium phosphate 200-400g, hydrophobic silica aerogel 50-190g, biochar 75-130g, potassium titanate whiskers 75-145g, nano-montmorillonite 65-105g, cellulose 9-39g, silicone defoamer 7-19g, dispersant 1-10g, flame retardant synergist 5-18g, preservative 1-7g, and deionized water 240-400g.

[0008] Furthermore, the weight of the raw materials is: modified sodium water glass 200-350g, acrylic emulsion 135-220g, magnesium phosphate 280-375g, hydrophobic silica aerogel 75-180g, biochar 80-120g, potassium titanate whiskers 90-125g, nano-montmorillonite 70-95g, cellulose 15-30g, silicone defoamer 8-15g, dispersant 2-8g, flame retardant synergist 7-15g, preservative 1-5g, and deionized water 250-350g.

[0009] Furthermore, the weight of the raw materials is: 300g of modified sodium water glass, 170g of acrylic emulsion, 320g of magnesium phosphate, 150g of hydrophobic silica aerogel, 100g of biochar, 120g of potassium titanate whiskers, 80g of nano-montmorillonite, 20g of cellulose, 10g of silicone defoamer, 5g of dispersant, 10g of flame retardant synergist, 3g of preservative, and 300g of deionized water.

[0010] Furthermore, the cellulose is composed of one or more of methyl cellulose, hydroxyethyl cellulose or carboxymethyl cellulose.

[0011] Furthermore, the organosilicon defoamer is composed of one or more of an emulsion-type organosilicon defoamer, an oily organosilicon defoamer or a solid organosilicon defoamer.

[0012] Furthermore, the dispersant is composed of one or more of fatty acid salts, quaternary ammonium salts, polyethanol type II, acrylic acid copolymers or sulfonates.

[0013] Furthermore, the flame retardant synergist is composed of one or more of antimony trioxide, magnesium hydroxide, aluminum hydroxide, zinc borate, copper oxide or cobalt oxide.

[0014] Furthermore, the preservative is composed of one or more of paraformaldehyde, imidazolidinyl urea, kasone, benzyl alcohol or hydroxybenzoate.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] In the present invention, magnesium phosphate decomposes at high temperatures to absorb heat, reducing the surface temperature of the coating, and its decomposition products help form an insulating layer; hydrophobic silica aerogel effectively prevents heat transfer due to its extremely low thermal conductivity, significantly improving the thermal insulation performance of the coating; biochar forms a carbon layer at high temperatures, blocking heat and oxygen, and enhancing the fireproofing effect; a variety of raw materials with fireproofing functions work together to construct a multi-level, comprehensive fireproofing system, which improves the fireproofing performance of the fireproof coating and can provide reliable fireproofing protection when a fire occurs; secondly, the present invention uses acrylic emulsion as a film-forming substance and deionized water as a solvent, which greatly reduces the emission of volatile organic compounds, and the modified sodium water glass, magnesium phosphate, hydrophobic silica aerogel, biochar, etc. used in the present invention are mostly inorganic or natural materials, have good environmental performance, reduce pollution to indoor and outdoor environments and potential harm to human health, so that the present invention has good environmental performance. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solution and technical effect of the present invention more clear, the specific embodiments of the present invention are described below. It should be understood that the specific embodiments described here are only used to explain the present invention and are not used to limit the present invention.

[0018] This embodiment provides an environmentally friendly fire-retardant coating, which is made from the following raw materials: modified sodium silicate, acrylic emulsion, magnesium phosphate, hydrophobic silica aerogel, biochar, potassium titanate whiskers, nano-montmorillonite, cellulose, silicone defoamer, dispersant, flame retardant synergist, preservative, and deionized water. The specific effects are as follows:

[0019] Modified sodium silicate: As an inorganic binder, it can provide strong adhesion for the coating; increase the hardness of the coating, making it more resistant to scratches and wear, and improve the durability of the coating in actual use;

[0020] Acrylate emulsion: Increases the flexibility, weather resistance, and water resistance of the coating, ensuring that the coating remains stable under different environmental conditions, is not prone to cracking or peeling, and extends its service life;

[0021] Magnesium phosphate: Its decomposition products help form a thermal insulation layer on the coating surface, which can prevent heat from being further transferred to the substrate and enhance fire resistance;

[0022] Hydrophobic silica aerogel: has extremely low thermal conductivity, which can prevent moisture from invading the coating and improve the water resistance of the coating;

[0023] Biomass charcoal: pyrolysis at high temperature forms a charcoal layer, which can block heat and oxygen, prevent direct contact between flames and the substrate, enhance the fireproof effect, and improve the fire resistance of the coating;

[0024] Potassium titanate whiskers: have high strength and heat resistance, significantly enhancing the mechanical properties of the coating;

[0025] Nano-montmorillonite: It has a nano-level lamellar structure and can form layered barrier layers in the coating;

[0026] Cellulose: As a thickener, it can effectively adjust the viscosity of the coating;

[0027] Silicone defoamer: can quickly reduce the surface tension of foam, causing the foam to burst and disappear;

[0028] Dispersant: Reduces the surface tension between particles so that the various solid particles in the coating are evenly dispersed in the liquid medium;

[0029] Flame retardant synergist: works synergistically with other fireproof materials to improve overall fireproof performance;

[0030] Preservatives: Inhibit the growth and reproduction of microorganisms during storage and use of paint, extending the shelf life of the paint.

[0031] Example 1:

[0032] The weight of the raw materials is: modified sodium silicate 150g, acrylic emulsion 100g, magnesium phosphate 200g, hydrophobic silica aerogel 50g, biochar 75g, potassium titanate whisker 75g, nano-montmorillonite 65g, methyl cellulose 9g, emulsion type silicone defoamer 7g, fatty acid salt 1g, antimony trioxide 5g, paraformaldehyde 1g, and deionized water 240g;

[0033] S1: Add the activated modified sodium silicate, acrylic emulsion and deionized water into a clean stirring device and control the stirring speed at 80r / min. The mixing of the two base materials can provide good adhesion and film-forming properties. Add fatty acid salts to the above mixed base materials so that the various solid particles added subsequently can be evenly dispersed in the coating system to avoid agglomeration.

[0034] S2: adding magnesium phosphate, hydrophobic silica aerogel, biochar, potassium titanate whiskers, antimony trioxide and paraformaldehyde to the above base material, and continuing mechanical stirring at a stirring speed of 200 r / min and a stirring time of 30 min to ensure that the above inorganic fillers can be fully dispersed to form a mixture;

[0035] S3: Add nano-montmorillonite and methyl cellulose to the mixture and continue stirring for 5 minutes. Adjust the stirring speed to 150 r / min to fully dissolve and disperse the methyl cellulose in the slurry and ensure that the nanomaterials can be evenly dispersed in the base material to form a mixed slurry;

[0036] S4: After the mixed slurry is stirred evenly, the stirring speed is controlled at 100 r / min, and an emulsion-type silicone defoamer is added, which can reduce the surface tension of the bubbles and cause them to burst and disappear; after the addition is completed, observe whether there are still many bubbles in the mixed slurry. At this time, an appropriate amount of emulsion-type silicone defoamer can be added to fully disperse it in the mixed slurry;

[0037] S5: Pour the slurry prepared in S4 into a grinding device, control the grinding medium particle size to 0.5 mm, the filling rate to 60%, the grinding speed to 1500 r / min, and the grinding time to 45 min; stop grinding when the slurry fineness reaches 30-45 μm;

[0038] S6: Filter the slurry ground in S5 through a filter screen with a 200-mesh filter screen to remove large particles of impurities that may be generated during the grinding process to ensure the quality of the coating;

[0039] S7: Place the filtered paint into a clean, dry packaging container and store it in a cool, dry, ventilated place.

[0040] Example 2:

[0041] The weight of the raw materials is: 350g of modified sodium water glass, 220g of acrylic emulsion, 375g of magnesium phosphate, 180g of hydrophobic silica aerogel, 120g of biochar, 125g of potassium titanate whiskers, 95g of nano-montmorillonite, 30g of hydroxyethyl cellulose, 15g of oily silicone defoamer, 8g of quaternary ammonium salt, 15g of magnesium hydroxide, 5g of imidazolidinyl urea, and 350g of deionized water;

[0042] S1: Add the activated modified sodium silicate, acrylic emulsion and deionized water into a clean stirring device and control the stirring speed at 120r / min. The mixing of the two base materials can provide good adhesion and film-forming properties. Add quaternary ammonium salt to the above mixed base materials so that the various solid particles added subsequently can be evenly dispersed in the coating system to avoid agglomeration.

[0043] S2: adding magnesium phosphate, hydrophobic silica aerogel, biochar, potassium titanate whiskers, magnesium hydroxide and imidazolidinyl urea to the above base material, and continuing mechanical stirring at a stirring speed of 350 r / min and a stirring time of 55 min to ensure that the above inorganic fillers can be fully dispersed to form a mixture;

[0044] S3: Add nano-montmorillonite and hydroxyethyl cellulose to the mixture, continue stirring for 10 minutes, and adjust the stirring speed to 250 r / min to fully dissolve and disperse the hydroxyethyl cellulose in the slurry, ensuring that the nanomaterials can be evenly dispersed in the base material to form a mixed slurry;

[0045] S4: After the mixed slurry is stirred evenly, the stirring speed is controlled at 150 r / min, and an oily organic silicone defoamer is added, which can reduce the surface tension of the bubbles and cause them to burst and disappear; after the addition is completed, observe whether there are still many bubbles in the mixed slurry. At this time, an appropriate amount of oily organic silicone defoamer can be added to fully disperse them in the mixed slurry;

[0046] S5: Pour the slurry prepared in S4 into a grinding device, control the grinding medium particle size to 1.5 mm, the filling rate to 80%, the grinding speed to 3000 r / min, and the grinding time to 60 min; stop grinding when the slurry fineness reaches 30-45 μm;

[0047] S6: Filter the slurry ground in S5 through a filter screen with a 350-mesh filter screen to remove large particles of impurities that may be generated during the grinding process to ensure the quality of the coating;

[0048] S7: Place the filtered paint into a clean, dry packaging container and store it in a cool, dry, ventilated place.

[0049] Example 3:

[0050] The weight of the raw materials is: 300g of modified sodium silicate, 170g of acrylic emulsion, 320g of magnesium phosphate, 150g of hydrophobic silica aerogel, 100g of biochar, 120g of potassium titanate whiskers, 80g of nano-montmorillonite, 20g of carboxymethyl cellulose, 10g of solid organosilicon defoamer, 5g of polyethanol type II, 10g of aluminum hydroxide, 3g of preservative, and 300g of deionized water;

[0051] S1: Add the activated modified sodium silicate, acrylic emulsion and deionized water into a clean stirring device and control the stirring speed at 100r / min. The mixing of the two base materials can provide good adhesion and film-forming properties. Add polyethanol type II to the above mixed base materials so that the various solid particles added subsequently can be evenly dispersed in the coating system to avoid agglomeration.

[0052] S2: adding magnesium phosphate, hydrophobic silica aerogel, biochar, potassium titanate whiskers, aluminum hydroxide and kasonite to the above base material, and continuing mechanical stirring at a stirring speed of 300 r / min and a stirring time of 30-55 min to ensure that the above inorganic fillers can be fully dispersed to form a mixture;

[0053] S3: Add nano-montmorillonite and carboxymethyl cellulose to the mixture and continue stirring for 8 minutes. Adjust the stirring speed to 200 r / min to fully dissolve and disperse the carboxymethyl cellulose in the slurry and ensure that the nanomaterials can be evenly dispersed in the base material to form a mixed slurry;

[0054] S4: After the mixed slurry is stirred evenly, the stirring speed is controlled at 125 r / min, and a solid organosilicon defoamer is added, which can reduce the surface tension of the bubbles and cause them to burst and disappear; after the addition is completed, observe whether there are still many bubbles in the mixed slurry. At this time, an appropriate amount of solid organosilicon defoamer can be added to fully disperse it in the mixed slurry;

[0055] S5: Pour the slurry prepared in S4 into a grinding device, control the grinding medium particle size to 1 mm, the filling rate to 70%, the grinding speed to 2000 r / min, and the grinding time to 55 min; stop grinding when the slurry fineness reaches 30-45 μm;

[0056] S6: Filter the slurry ground in S5 through a filter screen, using a 300-mesh filter screen to remove large particles of impurities that may be generated during the grinding process to ensure the quality of the coating;

[0057] S7: Place the filtered paint into a clean, dry packaging container and store it in a cool, dry, ventilated place.

[0058] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention.

Claims

1. An environmentally friendly fire retardant coating, characterized by: The invention is made of the following raw materials: modified sodium water glass, acrylic emulsion, magnesium phosphate, hydrophobic silica aerogel, biochar, potassium titanate whisker, nano-montmorillonite, cellulose, silicone defoaming agent, dispersant, flame retardant synergist, preservative and deionized water.

2. The environmentally friendly fire retardant coating according to claim 1, characterized in that: The weight of the raw materials is: 150-400g of modified sodium water glass, 100-300g of acrylic emulsion, 200-400g of magnesium phosphate, 50-190g of hydrophobic silica aerogel, 75-130g of biochar, 75-145g of potassium titanate whiskers, 65-105g of nano-montmorillonite, 9-39g of cellulose, 7-19g of silicone defoaming agent, 1-10g of dispersant, 5-18g of flame retardant synergist, 1-7g of preservative, and 240-400g of deionized water.

3. The environmentally friendly fire retardant coating according to claim 2, characterized in that: The weight of the raw materials is: modified sodium water glass 200-350g, acrylic emulsion 135-220g, magnesium phosphate 280-375g, hydrophobic silica aerogel 75-180g, biochar 80-120g, potassium titanate whisker 90-125g, nano-montmorillonite 70-95g, cellulose 15-30g, silicone defoamer 8-15g, dispersant 2-8g, flame retardant synergist 7-15g, preservative 1-5g, and deionized water 250-350g.

4. The environmentally friendly fire retardant coating according to claim 3, characterized in that: The weight of the raw materials is: 300g of modified sodium water glass, 170g of acrylic emulsion, 320g of magnesium phosphate, 150g of hydrophobic silica aerogel, 100g of biochar, 120g of potassium titanate whiskers, 80g of nano-montmorillonite, 20g of cellulose, 10g of silicone defoamer, 5g of dispersant, 10g of flame retardant synergist, 3g of preservative, and 300g of deionized water.

5. The environmentally friendly fire retardant coating according to claims 1-4, characterized in that: The cellulose is composed of one or more of methyl cellulose, hydroxyethyl cellulose or carboxymethyl cellulose.

6. The environmentally friendly fire retardant coating according to claims 1-4, characterized in that: The organosilicon defoamer is composed of one or more of an emulsion-type organosilicon defoamer, an oily organosilicon defoamer or a solid organosilicon defoamer.

7. The environmentally friendly fire retardant coating according to claims 1-4, characterized in that: The dispersant is composed of one or more of fatty acid salt, quaternary ammonium salt, polyethanol type II, acrylic acid copolymer or sulfonate.

8. The environmentally friendly fire retardant coating according to claims 1-4, characterized in that: The flame retardant synergist consists of one or more of antimony trioxide, magnesium hydroxide, aluminum hydroxide, zinc borate, copper oxide or cobalt oxide.

9. The environmentally friendly fire retardant coating according to claims 1-4, characterized in that: The preservative is composed of one or more of paraformaldehyde, imidazolidinyl urea, kasone, benzyl alcohol or hydroxybenzoic acid ester.