Multi-performance fireproof coating and preparation method thereof

Abstract

The invention discloses a multi-performance fireproof coating and a preparation method thereof, and solves the technical problems of poor weather resistance and low flexibility caused by loose texture of part of existing fireproof coatings. The building material comprises the following components in parts by mass: 35-50 parts of Portland cement, 12-15 parts of magnesium oxychloride, 1-2 parts of water glass, 15-20 parts of mica powder, 20-35 parts of floating beads, 5-10 parts of light calcium silicate, 3-6 parts of fly ash, 6-8 parts of light ceramsite, 10-20 parts of reinforced fibers, 10-13 parts of pigment, 3-5 parts of hydroxyethyl cellulose, 2-3 parts of a plasticizer, 2-3 parts of an ultraviolet light absorber, 3-5 parts of a waterproof agent and 80-120 parts of water. The characteristic that the texture of the coating is loose is effectively improved, the weather resistance of the fireproof coating is improved, and meanwhile, the ultraviolet light absorber and the waterproof agent jointly play a role, so that the weather resistance of the fireproof coating is further improved; the flexibility and wear resistance of the coating are remarkably improved, so that the coating does not crack under the action of external force.

Description

Technical Field

[0001] The invention belongs to the technical field of building fire protection, and in particular relates to a multi-performance fire retardant coating and a preparation method thereof. Background Art

[0002] The structure of a high-rise building is generally a reinforced concrete structure, a steel structure, a steel-concrete composite structure, etc. Concrete structures have good fire resistance, and their fire resistance is mainly due to the concrete aggregate inside them. These concrete aggregates are usually hard, dense mineral materials with high fire resistance. The fire resistance of steel structures is relatively poor. Steel is a combustible material. At high temperatures, the strength and elastic modulus of steel will drop significantly, and may even cause structural damage. Therefore, for steel structure high-rise buildings, fire prevention measures are usually required, such as applying fire retardant coatings, setting up fire partitions, etc., to improve their fire resistance.

[0003] Steel-structured high-rise buildings are exposed to the natural environment for a long time and will be affected by natural factors such as wind, rain, snow, and sunlight. The fireproof materials used in steel-structured high-rise buildings should have a certain degree of weather resistance; steel-structured high-rise buildings will be deformed due to hot and cold cycles, earthquakes, vibrations, foundation settlement and wind loads. The fireproof materials used in steel-structured high-rise buildings should have a certain degree of flexibility; the fireproof materials used in steel-structured high-rise buildings should have a certain strength to withstand various loads such as collisions, gravity, and wind.

[0004] However, some existing fire retardant coatings have a loose texture and will become powdery after long-term use, affecting the weather resistance of the fire retardant coatings. Some fire retardant coatings have high strength but poor flexibility and are prone to cracking when subjected to external forces. Cracking not only affects the appearance of the coating, but may also damage its fire retardant properties, thereby threatening the safety of the building.

[0005] Therefore, how to provide a fire retardant coating with high weather resistance and flexibility has become a technical problem that needs to be solved urgently by technicians in the relevant technical field. Summary of the invention

[0006] The technical problem to be solved by the present invention is to provide a multi-performance fire retardant coating and a preparation method thereof, so as to at least solve some of the above-mentioned technical problems.

[0007] To achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0008] A multi-performance fire retardant coating, comprising the following components in parts by weight:

[0009]

[0010] Furthermore, the reinforcing fiber is any one or more of aluminum silicate fiber, glass fiber, gypsum fiber, carbon fiber, silica fiber, and asbestos fiber.

[0011] Furthermore, the reinforcing fiber is aluminum silicate fiber.

[0012] Furthermore, the pigment is titanium dioxide.

[0013] Furthermore, the plasticizer is epoxidized soybean oil.

[0014] Furthermore, the ultraviolet absorber is 2-hydroxy-4-methoxybenzophenone.

[0015] Furthermore, the waterproofing agent is sodium methyl silicate.

[0016] A method for preparing a multi-performance fire retardant coating comprises the following steps:

[0017] Step 1: weigh the raw materials in parts by weight;

[0018] Step 2: Turn on the mixer, add silicate cement, magnesium oxychloride, mica powder, floating beads, light calcium silicate, fly ash, light ceramsite, reinforcing fiber, and pigment into the mixer and stir for premixing. The stirring time is 15-20 minutes.

[0019] Step 3: Add the prepared water into the blender and mix for 20-35 minutes;

[0020] Step 4: Add water glass, hydroxyethyl cellulose, plasticizer, ultraviolet absorber and waterproofing agent into a blender and stir for 20-30 minutes;

[0021] Step 5: Discharge the slurry in the mixer into a colloid grinder for grinding for 1.2-2 hours;

[0022] Step 6: The slurry in the grinder is discharged into a vibrating screen for filtration, and the impurities mixed in during the operation are filtered out to obtain the fire retardant coating.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] The present invention appropriately increases the solid content, reduces the water content, and utilizes the synergistic effect of water glass, magnesium oxychloride, mica powder and hydroxyethyl cellulose to improve the viscosity and adhesion of the coating, effectively increases the cohesive force of the coating, makes the coating more uniform and compact during the coating process, improves the loose texture of the coating, thereby improving the weather resistance of the fire-retardant coating. At the same time, the ultraviolet absorber and the waterproofing agent of the present invention work together to further improve the weather resistance of the fire-retardant coating. The present invention fully stirs and grinds the coating components to avoid agglomeration or stratification, so that the coating has a uniform texture, and adds a plasticizer, utilizes the uniformity of the coating texture and the good flexibility of the plasticizer molecular chain, significantly improves the flexibility and wear resistance of the coating, and prevents the coating from cracking under the action of external force.

[0025] Among them, the uniform texture of the coating can reduce defects and stress concentration inside the coating, which is beneficial to improving the flexibility of the coating.

[0026] The present invention uses silicate cement, magnesium oxychloride and mica powder, which not only enhance the fireproof performance of the coating, but also improve the adhesion of the coating, so that the coating is not easy to peel, crack or fall off. Among them, silicate cement has the advantages of high fire resistance, high durability, excellent mechanical properties, high environmental protection and high workability. The present invention applies silicate cement to the fire-retardant coating, which can significantly enhance the fireproof performance and durability of the fire-retardant coating, and makes the fire-retardant coating easy to construct; magnesium oxychloride has high bonding strength and fire resistance, and can form a stable coating with other components in the coating to prevent the spread of fire; mica powder has the advantages of elasticity, toughness, insulation, high temperature resistance, acid and alkali resistance, corrosion resistance and strong adhesion. The mica powder is applied to the coating, which can effectively enhance the coating's anti-permeability, weather resistance, fire resistance, corrosion resistance and bonding strength.

[0027] The present invention uses floating beads, light calcium silicate, fly ash and light ceramsite to reduce the cost of the coating, enhance the fire retardant performance of the coating, and reduce the surface density of the coating. Among them, the floating beads are hollow spherical structures, light in weight, and have excellent durability, heat insulation, weather resistance, corrosion resistance and chemical stability. Adding floating beads to the fire retardant coating can stabilize the performance of the fire retardant coating, improve the fire resistance, weather resistance and corrosion resistance of the fire retardant coating, and reduce the surface density of the filler; the floating beads are derived from industrial waste such as fly ash. Adding the floating beads to the fire retardant coating can reduce the amount of other components, thereby reducing the cost of the coating; light calcium silicate has the advantages of high temperature resistance, wear resistance, high hardness, good chemical stability and good thermal conductivity. Applying light calcium silicate to the fire retardant coating can improve the fire retardant performance of the fire retardant coating, enhance the mechanical strength of the fire retardant coating, and improve the anti-corrosion performance of the fire retardant coating. Based on the characteristics of light calcium silicate with good thermal conductivity, light calcium silicate can It can disperse and conduct heat in fire retardant coatings. When the coating is subjected to high-temperature heat source, light calcium silicate can conduct heat to the entire surface of the coating, reduce heat concentration, reduce the local temperature of the coating, and thus improve the fire retardant performance of the fire retardant coating; fly ash can fill micropores in fire retardant coatings, improve the wind resistance of fire retardant coatings, and at the same time, reduce the production cost of fire retardant coatings; lightweight expanded clay has a honeycomb structure inside, is light in weight, and has the characteristics of high strength, weathering resistance, low water absorption and excellent fire resistance. Applying lightweight expanded clay to fire retardant coatings can improve the mechanical properties of fire retardant coatings, enhance the durability and fire resistance of fire retardant coatings, reduce the surface density of fire retardant coatings, and reduce the hygroscopic expansion of fire retardant coatings in humid environments, so as to keep the fire retardant coatings stable.

[0028] The invention uses water glass to improve the adhesion of the fire retardant coating by utilizing the good bonding property of the water glass, and to disperse the solid particles in the fire retardant coating by utilizing the dispersibility of the water glass, thereby improving the construction performance of the fire retardant coating, improving the fluidity and plasticity of the fire retardant coating, and making the fire retardant coating easy to construct.

[0029] The present invention uses hydroxyethyl cellulose to make the fire retardant coating thicker and increase the viscosity and adhesion of the fire retardant coating; to improve the suspension stability of the fire retardant coating and prevent the sedimentation and stratification phenomenon during the use of the fire retardant coating; to improve the wettability and permeability of the fire retardant coating so that the fire retardant coating can be evenly distributed during the use, thereby facilitating the formation of a dense fire retardant coating; and to improve the water resistance and weather resistance of the fire retardant coating and extend the service life of the fire retardant coating.

[0030] The reinforcing fiber of the present invention preferably uses aluminum silicate fiber, which is a lightweight refractory material with the advantages of high temperature resistance, excellent heat insulation performance, good thermal stability, non-toxicity, strong resistance to mechanical vibration, and good chemical stability. Aluminum silicate fiber mainly plays the role of heat insulation, reinforcement, filling and support in fire retardant coatings. Adding aluminum silicate fiber to fire retardant coatings can improve the heat insulation performance, fire resistance and high temperature stability of fire retardant coatings.

[0031] The pigment of the present invention is preferably titanium dioxide, which is used to improve the color of the fire retardant coating, so that the fire retardant coating presents a white and bright appearance and enhances the decorativeness of the fire retardant coating. Titanium dioxide has excellent chemical stability, which allows the color of the fire retardant coating to be maintained in complex environments.

[0032] The plasticizer of the present invention is preferably epoxy soybean oil, because the flexibility of the fire retardant coating is enhanced by utilizing the good flexibility of the molecular chain of the epoxy soybean oil.

[0033] The ultraviolet absorber of the present invention preferably uses 2-hydroxy-4-methoxybenzophenone, which is a highly efficient ultraviolet absorber that can absorb ultraviolet light energy. In the practical application of fire-retardant coatings, ultraviolet rays not only cause the fire-retardant coating to age and fade, but may also affect the fireproof performance of the coating. By absorbing ultraviolet rays through 2-hydroxy-4-methoxybenzophenone, the fire-retardant coating can be effectively protected from ultraviolet damage, thereby extending the service life of the fire-retardant coating and maintaining its fireproof performance.

[0034] The waterproofing agent of the present invention preferably uses sodium methyl silicate, which has excellent waterproof performance and can form a dense waterproof film on the surface or inside of the fire retardant coating. The waterproof film can effectively prevent water penetration, reduce the impact of natural rainwater on the fire retardant coating, and improve the weather resistance of the fire retardant coating. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical scheme and advantages of the present invention more clear, the present invention is further described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] Example 1

[0037] 35 parts of silicate cement, 12 parts of magnesium oxychloride, 15 parts of mica powder, 20 parts of floating beads, 5 parts of light calcium silicate, 3 parts of fly ash, 6 parts of light ceramsite, 10 parts of reinforcing fiber and 10 parts of pigment are added into a mixer and stirred for premixing for 15 minutes; then 80 parts of water are added into the mixer and stirred for 20 minutes; then 1 part of water glass, 3 parts of hydroxyethyl cellulose, 2 parts of plasticizer, 2 parts of ultraviolet absorber and 3 parts of waterproofing agent are added into the mixer and stirred for 20 minutes; then the slurry in the mixer is discharged into a colloid grinder for grinding for 1.2 hours; finally, the slurry in the grinder is discharged into a vibrating screen for filtration, and the impurities mixed in during the operation are filtered out to obtain the fire retardant coating.

[0038] Example 2

[0039] 45 parts of silicate cement, 15 parts of magnesium oxychloride, 20 parts of mica powder, 35 parts of floating beads, 10 parts of light calcium silicate, 6 parts of fly ash, 8 parts of light ceramsite, 20 parts of reinforcing fiber and 13 parts of pigment are added into a mixer and stirred for premixing for 20 minutes; then 120 parts of water are added into the mixer and stirred for 35 minutes; then 2 parts of water glass, 5 parts of hydroxyethyl cellulose, 3 parts of plasticizer, 3 parts of ultraviolet absorber and 5 parts of waterproofing agent are added into the mixer and stirred for 30 minutes; then the slurry in the mixer is discharged into a colloid grinder for grinding for 2 hours; finally, the slurry in the grinder is discharged into a vibrating screen for filtration, and the impurities mixed in during the operation are filtered out to obtain the fire retardant coating.

[0040] Example 3

[0041] 37 parts of Portland cement, 12.5 parts of magnesium oxychloride, 16 parts of mica powder, 22 parts of floating beads, 7 parts of light calcium silicate, 5 parts of fly ash, 6.5 parts of light ceramsite, 15 parts of reinforcing fiber and 12 parts of pigment are added into a mixer and stirred for premixing for 16 minutes; then 85 parts of water are added into the mixer and stirred for 23 minutes; then 1.2 parts of water glass, 3.2 parts of hydroxyethyl cellulose, 2.2 parts of plasticizer, 2.9 parts of ultraviolet absorber and 3.7 parts of waterproofing agent are added into the mixer and stirred for 23 minutes; then the slurry in the mixer is discharged into a colloid grinder for grinding for 1.5 hours; finally, the slurry in the grinder is discharged into a vibrating screen for filtration, and the impurities mixed in during the operation are filtered out to obtain the fire retardant coating.

[0042] Example 4

[0043] 42 parts of silicate cement, 13.5 parts of magnesium oxychloride, 17 parts of mica powder, 27 parts of floating beads, 9 parts of light calcium silicate, 4 parts of fly ash, 7.5 parts of light ceramsite, 12 parts of reinforcing fiber and 11.5 parts of pigment are added into a mixer and stirred for premixing for 19 minutes; then 95 parts of water are added into the mixer and stirred for 25 minutes; then 1.5 parts of water glass, 4 parts of hydroxyethyl cellulose, 2.9 parts of plasticizer, 2.2 parts of ultraviolet absorber and 4.9 parts of waterproofing agent are added into the mixer and stirred for 26 minutes; then the slurry in the mixer is discharged into a colloid grinder for grinding for 1.8 hours; finally, the slurry in the grinder is discharged into a vibrating screen for filtration, and the impurities mixed in during the operation are filtered out to obtain the fire retardant coating.

[0044] Example 5

[0045] 43 parts of silicate cement, 14 parts of magnesium oxychloride, 19 parts of mica powder, 29 parts of floating beads, 8 parts of light calcium silicate, 5.5 parts of fly ash, 7 parts of light ceramsite, 18 parts of reinforcing fiber and 10.5 parts of pigment are added into a mixer and stirred for premixing for 18 minutes; then 100 parts of water are added into the mixer and stirred for 27 minutes; then 1.7 parts of water glass, 4.2 parts of hydroxyethyl cellulose, 2.7 parts of plasticizer, 2.7 parts of ultraviolet absorber and 3.1 parts of waterproofing agent are added into the mixer and stirred for 22 minutes; then the slurry in the mixer is discharged into a colloid grinder for grinding for 1.7 hours; finally, the slurry in the grinder is discharged into a vibrating screen for filtration, and the impurities mixed in during the operation are filtered out to obtain the fire retardant coating.

[0046] Example 6

[0047] 39 parts of silicate cement, 12.7 parts of magnesium oxychloride, 18 parts of mica powder, 22 parts of floating beads, 6 parts of light calcium silicate, 4.5 parts of fly ash, 6.3 parts of light ceramsite, 17 parts of reinforcing fiber and 12.7 parts of pigment are added into a mixer and stirred for premixing for 17 minutes; then 105 parts of water are added into the mixer and stirred for 29 minutes; then 1.4 parts of water glass, 3.7 parts of hydroxyethyl cellulose, 2.6 parts of plasticizer, 2.5 parts of ultraviolet absorber and 3.4 parts of waterproofing agent are added into the mixer and stirred for 29 minutes; then the slurry in the mixer is discharged into a colloid grinder for grinding for 1.6 hours; finally, the slurry in the grinder is discharged into a vibrating screen for filtration, and the impurities mixed in during the operation are filtered out to obtain the fire retardant coating.

[0048] Example 7

[0049] 40 parts of silicate cement, 13.8 parts of magnesium oxychloride, 15.8 parts of mica powder, 25 parts of floating beads, 5.5 parts of light calcium silicate, 3.2 parts of fly ash, 7.2 parts of light ceramsite, 19 parts of reinforcing fiber and 12.5 parts of pigment are added into a mixer and stirred for premixing for 15.5 minutes; then 110 parts of water are added into the mixer and stirred for 22 minutes; then 1.8 parts of water glass, 4.5 parts of hydroxyethyl cellulose, 2.5 parts of plasticizer, 2.6 parts of ultraviolet absorber and 3.3 parts of waterproofing agent are added into the mixer and stirred for 25 minutes; then the slurry in the mixer is discharged into a colloid grinder for grinding for 1.4 hours; finally, the slurry in the grinder is discharged into a vibrating screen for filtration, and the impurities mixed in during the operation are filtered out to obtain the fire retardant coating.

[0050] Example 8

[0051] 47 parts of silicate cement, 14.5 parts of magnesium oxychloride, 16.5 parts of mica powder, 32 parts of floating beads, 8.5 parts of light calcium silicate, 3.5 parts of fly ash, 7.6 parts of light ceramsite, 13 parts of reinforcing fiber and 10.8 parts of pigment are added into a mixer and stirred for premixing for 17.5 minutes; then 115 parts of water are added into the mixer and stirred for 30 minutes; then 1.9 parts of water glass, 4.7 parts of hydroxyethyl cellulose, 2.4 parts of plasticizer, 2.4 parts of ultraviolet absorber and 3.8 parts of waterproofing agent are added into the mixer and stirred for 27 minutes; then the slurry in the mixer is discharged into a colloid grinder for grinding for 1.35 hours; finally, the slurry in the grinder is discharged into a vibrating screen for filtration, and the impurities mixed in during the operation are filtered out to obtain the fire retardant coating.

[0052] Finally, it should be noted that the above embodiments are only preferred embodiments of the present invention to illustrate the technical solutions of the present invention, rather than limiting them, and certainly not limiting the patent scope of the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention. In other words, any changes or modifications made to the main design concept and spirit of the present invention that have no substantive significance, and the technical problems they solve are still consistent with the present invention, should be included in the protection scope of the present invention. In addition, the direct or indirect application of the technical solutions of the present invention in other related technical fields is also included in the patent protection scope of the present invention.

Claims

1. A multi-performance fire retardant coating, characterized in that: It is composed of the following components in parts by weight:

2. A multi-performance fire retardant coating according to claim 1, characterized in that: The reinforcing fiber is any one or more of aluminum silicate fiber, glass fiber, gypsum fiber, carbon fiber, silica fiber, and asbestos fiber.

3. A multi-performance fire retardant coating according to claim 2, characterized in that: The reinforcing fiber is aluminum silicate fiber.

4. A multi-performance fire retardant coating according to claim 1, characterized in that: The pigment is titanium dioxide.

5. The multi-performance fire retardant coating according to claim 1, characterized in that: The plasticizer is epoxidized soybean oil.

6. The multi-performance fire retardant coating according to claim 1, characterized in that: The ultraviolet absorber is 2-hydroxy-4-methoxybenzophenone.

7. The multi-performance fire retardant coating according to claim 1, characterized in that: The waterproofing agent is sodium methyl silicate.

8. A method for preparing a multi-performance fire retardant coating according to any one of claims 1 to 7, characterized in that: The steps include: Step 1: weigh the raw materials in parts by weight; Step 2: Turn on the mixer, add silicate cement, magnesium oxychloride, mica powder, floating beads, light calcium silicate, fly ash, light ceramsite, reinforcing fiber, and pigment into the mixer and stir for premixing. The stirring time is 15-20 minutes. Step 3: Add the prepared water into the blender and mix for 20-35 minutes; Step 4: Add water glass, hydroxyethyl cellulose, plasticizer, ultraviolet absorber and waterproofing agent into a blender and stir for 20-30 minutes; Step 5: Discharge the slurry in the mixer into a colloid grinder for grinding for 1.2-2 hours; Step 6: The slurry in the grinder is discharged into a vibrating screen for filtration, and the impurities mixed in during the operation are filtered out to obtain the fire retardant coating.

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