CN117004278A - Environment-friendly cementing material-based fireproof paint and preparation method thereof - Google Patents

Environment-friendly cementing material-based fireproof paint and preparation method thereof Download PDF

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Publication number
CN117004278A
CN117004278A CN202310937052.0A CN202310937052A CN117004278A CN 117004278 A CN117004278 A CN 117004278A CN 202310937052 A CN202310937052 A CN 202310937052A CN 117004278 A CN117004278 A CN 117004278A
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emulsion
parts
707vae
environment
cementing material
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郑晓燕
杨政险
刘泓
李自祥
穆奇峰
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Stantu Fujian Fireproof Material Co ltd
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Stantu Fujian Fireproof Material Co ltd
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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D131/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an acyloxy radical of a saturated carboxylic acid, of carbonic acid, or of a haloformic acid; Coating compositions based on derivatives of such polymers
    • C09D131/02—Homopolymers or copolymers of esters of monocarboxylic acids
    • C09D131/04—Homopolymers or copolymers of vinyl acetate
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/08—Anti-corrosive paints
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/18—Fireproof paints including high temperature resistant paints
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/60—Additives non-macromolecular
    • C09D7/61—Additives non-macromolecular inorganic
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/60—Additives non-macromolecular
    • C09D7/61—Additives non-macromolecular inorganic
    • C09D7/62—Additives non-macromolecular inorganic modified by treatment with other compounds
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/70—Additives characterised by shape, e.g. fibres, flakes or microspheres
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C08K2003/2227—Oxides; Hydroxides of metals of aluminium
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2201/00—Properties
    • C08L2201/02—Flame or fire retardant/resistant

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  • Engineering & Computer Science (AREA)
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  • Wood Science & Technology (AREA)
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  • Inorganic Chemistry (AREA)
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Abstract

The invention discloses an environment-friendly cementing material-based fireproof coating and a preparation method thereof, wherein the fireproof coating is prepared from cementing materials, heat-insulating materials, high-temperature anti-stripping agents, alkali-activated agents, dispersing agents, flame-retardant materials, impervious agents and water, wherein the cementing materials comprise cement, regenerated micro powder and slag, the high-temperature anti-stripping agents comprise glass powder with low, medium and high melting points, and the impervious agents comprise 707VAE emulsion, acrylic emulsion, rust inhibitors and sepiolite. The fireproof paint has excellent fireproof performance and excellent anticorrosion and impervious performance, and can solve the problem that cement-based fireproof paint is easy to peel off at high temperature in fire.

Description

Environment-friendly cementing material-based fireproof paint and preparation method thereof
Technical Field
The invention belongs to the field of fireproof coatings, and particularly relates to an environment-friendly cementing material-based fireproof coating and a preparation method thereof.
Background
The frames of modern high-size and large-size buildings mostly adopt steel structures, and the steel used as a bearing member has high strength, light dead weight and easy construction, but the steel has high heat conductivity coefficient, so that the bearing capacity of the structure is easy to lose under the condition of fire disaster, and the building collapses. The fireproof paint for steel structure is one kind of fireproof paint for building and structure to form fireproof heat insulating protecting layer fast in fire, and this can raise the fireproof limit of steel structure and reach the fireproof standard of building. At present, the non-expansion type steel structure fireproof paint is a common steel structure fireproof paint because of stable coating and low cost, but a plurality of problems still exist in the engineering application process:
(1) The fire resistance time of the non-intumescent steel structure fire retardant coating is related to the thickness of the coating, but temperature and humidity changes easily cause the thickness of the fire retardant coating to be reduced, and the durability of the fire retardant coating is reduced.
(2) When the coating is used in coastal damp and hot environment for a long time, the salting-out phenomenon is commonly generated, so that the physical and chemical properties of the coating are reduced, the non-expansion type steel structure fireproof coating is not firmly bonded with the steel structure or cracked, and finally the fireproof coating and the steel structure fall off.
(3) Steel structure buildings and structures in southeast areas are influenced by multiple actions of sea wind, salt fog, sun drying, tides and the like all the year round, and the corrosion of the steel structure is easily caused by the combination of water in the air and chloride ions. At present, the non-expansion type steel structure fireproof coating has larger porosity, and the cementing materials adhered to the surface of the light heat-insulating material inside the coating are less and unevenly distributed, so that the impermeability of the non-expansion type steel structure fireproof coating is seriously affected.
(4) The cement-based fireproof paint is easy to generate spalling phenomenon in a fire high-temperature environment, so that steel is exposed to the high-temperature environment, and the protection effect of the fireproof paint on a steel structure is lost.
Therefore, in order to improve the anti-stripping performance of the cement-based steel structure fireproof paint in a high-temperature environment and simultaneously have the anti-corrosion and anti-seepage protection performance, the design of the environment-friendly cementing material-based fireproof paint has important significance for the application and popularization of the non-expansion steel structure fireproof paint.
Under the moist condition, compared with the traditional cement, the alkali-activated slag cement has the characteristics of lower water and chloride ion permeability, rapid setting and hardening, large shrinkage and the like, and seriously influences the application potential of the alkali-activated slag cement in replacing the traditional cement and in the non-expansion type steel structure fireproof coating. Meanwhile, about 15% of regenerated micro powder is generated in the process of converting the waste concrete into the regenerated aggregate. The regenerated micro powder has low activity and high water absorption, and can be applied only after physical-chemical excitation. Therefore, the regenerated fine powder is not widely used for recycling except a part of the regenerated fine powder is used for aerated concrete, clay bricks and roadbed treatment. If the regenerated micro powder can be used for replacing matrix cement of the non-expansion type steel structure fireproof coating, the problem of low utilization rate of the regenerated micro powder is hopefully solved.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides the environment-friendly cementing material-based fireproof paint and the preparation method thereof, which remarkably improve the fireproof and impervious effects and the high Wen Baola resistance of the fireproof paint and play a positive promotion role in popularization and application of inorganic non-intumescent fireproof paint.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the environment-friendly cementing material-based fireproof paint comprises the following raw materials in parts by weight: 85-246.5 parts of cementing material, 135.5-440 parts of heat insulation material, 50-180 parts of high-temperature anti-stripping agent, 3-7.5 parts of alkali-exciting agent, 21.5-95 parts of dispersing agent, 5.5-12 parts of flame retardant material, 241-407.5 parts of impervious agent and 213-350 parts of water.
The cementing material comprises cement, regenerated micro powder and slag in a mass ratio of 5:6:10. The cement is any one of Portland cement and ordinary Portland cement; the surface of the regenerated micro powder particles is provided with a part of joint surfaces and a plurality of micro fine particles, and the bulk density is 903-917 kg/m 3 Apparent density is 2515-2651 kg/m 3 Specific surface area 4500-4700 kg/m 3 The main chemical components are silicon dioxide, calcium oxide, aluminum oxide, ferric oxide, potassium oxide, magnesium oxide, sodium oxide and sulfur trioxide; the slag has a grade of S95 and a specific surface area of 250m 2 /kg。
The high-temperature anti-stripping agent comprises low-melting-point glass powder, medium-melting-point glass powder and high-melting-point glass powder in a mass ratio of 1:1:1.
The impervious agent comprises 707VAE emulsion, acrylic emulsion, rust inhibitor and sepiolite in a mass ratio of 200:5:1:20. The 707VAE emulsion is milky white, has no particles, foreign matters or precipitates, the pH value is 4.0-6.5, and the viscosity of the emulsion mPa.s (25 ℃) is 500-1000; the solids content of the acrylic emulsion was 50%; the rust inhibitor is nitrite rust inhibitor, the compression strength ratio of 7d to 15d is 106, and the steel plate has no rust corrosion in the anodic polarization test of the fireproof coating; the sepiolite is white and has a volume weight of 652kg/m 3 。
The heat preservation and insulation material is expanded perlite which is white, spherical and has a volume weight of 83 kg/m 3 The nominal diameter is 3mm.
The alkali-activated agent is anhydrous sodium sulfate.
The dispersant is hollow floating beads with nominal diameter of 0.9mm and volume weight of 338kg/m 3 The heat conductivity at normal temperature is 0.035W/(m.K).
The flame retardant material is aluminum hydroxide, and the purity of the flame retardant material is 99.9%.
The temperature of the water is 22-28 ℃.
Further, the weight ratio of the heat preservation and insulation material to the cementing material is 1.1-2.5.
The preparation of the environment-friendly cementing material-based fireproof paint comprises the following steps:
1) Ball milling the regenerated micro powder, slag and glass powder with each melting point respectively for 1-4 hours at the rotating speed of 200 r/min;
2) Dividing the 707VAE emulsion into a 707VAE emulsion A and a 707VAE emulsion B according to a weight ratio of 3:7, and dividing the 707VAE emulsion B into a 707VAE emulsion B1 and a 707VAE emulsion B2 according to a weight ratio of 8:2; meanwhile, the acrylic emulsion is divided into acrylic emulsion A and acrylic emulsion B according to the weight ratio of 8:2; dividing the water into water A and water B according to the weight ratio of 3:7;
3) Pouring the expanded perlite into 707VAE emulsion A, stirring at 53r/min for 2min, standing for 4-6h in a maintenance environment with the humidity of more than or equal to 80% at 20+/-2 ℃ after stirring, and drying at 60 ℃ for 6-8h to obtain modified expanded perlite;
4) Cement, anhydrous sodium sulfate, modified expanded perlite, sepiolite, aluminum hydroxide, rust inhibitor, the ground regenerated micro powder, slag and glass powder with various melting points are stirred by a mixer for 4-8 hours, so as to obtain uniformly mixed powder;
5) Adding the acrylic emulsion A, the 707VAE emulsion B1 and the hollow floating beads into the water A, and dispersing for 3-5 min at the rotating speed of 220r/min to obtain emulsion dispersion liquid A; adding 707VAE emulsion B2 and acrylic emulsion B into the emulsion dispersion liquid A, and stirring at a rotation speed of 220r/min for 1-2 min to obtain emulsion dispersion liquid B;
6) And (3) adding the powder obtained in the step (4) into water B, stirring at a rotating speed of 62+/-5 r/min for 30s, gradually pouring into emulsion dispersion liquid B, stirring at a rotating speed of 125+/-10 r/min for 1-2 min, and finally stirring at a rotating speed of 62+/-5 r/min for 30s to obtain the environment-friendly cementing material-based fireproof coating.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention adopts the ground regenerated micro powder and slag to partially replace cement, thereby saving the cement consumption, remarkably improving the physicochemical effect and the impermeability of the fireproof coating, assisting the alkali-activated agent to form the matrix of the novel environment-friendly cementing material-based fireproof coating, promoting the reaction of active ingredients in the liquid phase of the slurry, enabling more molecules in unit volume to be activated, generating more fixed chloride ion sites and reducing the chloride ion permeation quantity. The ball mill can release the encapsulated hydration product in the regenerated micro powder to make the hydration product undergo secondary reaction, and the generated gel encapsulates self particles, so that the free channel of part of chloride ions in the fireproof paint is closed, and the permeation resistance of the fireproof paint is obviously improved.
2. The invention adopts the expanded perlite as heat-insulating material, the main components of the expanded perlite are fire-retardant substances such as silicon dioxide, aluminum oxide, magnesium oxide and the like, and the characteristics of light weight, heat insulation, innocuity, incombustibility and the like of the expanded perlite are utilized to form a fireproof coating framework, so that the heat-insulating performance of the fireproof coating is improved. The hollow floating beads, sepiolite, finely ground slag, regenerated micro powder and other fine particles gradually fill the gaps of the framework, so that the setting time of the fireproof paint and the volume shrinkage of the paint in the curing process can be effectively improved, the overall stability of the fireproof paint is ensured, and the application and popularization of the fireproof paint are obviously promoted.
3. The invention adopts aluminum hydroxide as a flame retardant material, which starts to absorb heat and decompose to generate water and aluminum oxide at 230 ℃, and after the decomposition is finished at about 600 ℃, only aluminum oxide and a small amount of impurities are left, and the removed water is further evaporated and absorbs heat at high temperature, so that the fire resistance of the fireproof paint is ensured.
4. The invention adopts 707VAE emulsion modified expanded perlite, sepiolite, rust inhibitor and acrylic emulsion to form a fire-proof coating permeation-resistant system. 707VAE emulsion can improve the adhesive property and flow of the fireproof paint, and the 707VAE emulsion is adopted to carry out hydrophobic treatment on the surface of the expanded perlite, so that the water absorption of the expanded perlite is reduced, the heat bridge formed by water molecules in the expanded perlite is reduced, and the embrittlement and the damage of the fireproof paint in the sea environment with higher humidity are prevented. Sepiolite layer chain structure with surface area up to 900m 2 /g, interlaminar Mg 2+ Can exchange electrons with the chloride ions in the water molecules, has obvious adsorption effect on the chloride ions, and prevents the diffusion rate of the chloride ions in the fireproof paint. The rust inhibitor is used as a material for reducing rust on steel, can enable the surface of the steel to generate a layer of ferric oxide passivation film, further prevent chloride ions and moisture from penetrating, and remarkably improve the rust prevention effect of the fireproof paint on the steel. The acrylic emulsion can form an anti-blocking layer on the surface of the particlesThe protective film is elastic and not easy to break all the time in the high-temperature and high-humidity environment of the coastal area, and after solidification, the heat-insulating material of the fireproof coating and the hydration product are interwoven to form an inter-network structure, so that moisture chloride ions are not easy to penetrate, permeability of the fireproof coating is reduced, the fireproof coating is prevented from separating and stripping under the conditions of sea wind, salt fog, sunlight and the like, and usability, attractive appearance and integration with a steel structure of the fireproof coating are facilitated.
5. According to the invention, the hollow floating beads are used as the dispersing agent of the emulsion dispersion liquid, the hydrogen bonding effect of the hollow floating beads and the emulsion improves the cracking temperature of the emulsion dispersion liquid, so that the thermal performance, the durability and the mechanical performance of the emulsion dispersion liquid at high temperature are improved, and the durability of the fireproof coating in a high-temperature and high-humidity environment is improved.
6. When a fire occurs, two stages of changes occur, the fire is firstly changed from weak to strong and then from strong to weak, and the highest temperature is usually 600-800 ℃. The invention adopts three glass powders with different melting points as high-temperature anti-stripping agents, when the ambient temperature reaches the melting point of the glass powder after a fire disaster occurs, the corresponding glass powder is melted to wrap the filler in the fireproof paint, then when the fire disaster progresses to a descending stage, the glass powder is cooled after the temperature is lower than the melting point of the glass powder, various fillers are quickly bonded together to form a whole with higher strength, and the peeling phenomenon of the cement-based fireproof paint at high temperature is prevented. Aiming at different fire conditions, three glass powders with different melting points can correspondingly play a role, so that the condition that the highest temperature possibly occurs in most fires is covered, and the fireproof coating can keep better integrity in fire environments with different temperatures.
7. The fireproof paint has excellent fireproof performance and excellent anticorrosion and impervious performance, and can solve the problem that cement-based fireproof paint is easy to peel off at high temperature in fire.
Detailed Description
The invention provides an environment-friendly cementing material-based fireproof coating, which comprises the following raw materials in parts by weight: 85-246.5 parts of cementing material, 135.5-440 parts of heat insulation material, 50-180 parts of high-temperature anti-stripping agent, 3-7.5 parts of alkali-exciting agent, 21.5-95 parts of dispersing agent, 5.5-12 parts of flame retardant material, 241-407.5 parts of impervious agent and 213-350 parts of water.
The cementing material comprises cement, regenerated micro powder and slag in a mass ratio of 5:6:10.
The high-temperature anti-stripping agent comprises low-melting-point glass powder, medium-melting-point glass powder and high-melting-point glass powder in a mass ratio of 1:1:1.
The impervious agent comprises 707VAE emulsion, acrylic emulsion, rust inhibitor and sepiolite in a mass ratio of 200:5:1:20.
The heat preservation and insulation material is expanded perlite. The alkali-activated agent is anhydrous sodium sulfate. The dispersing agent is hollow floating beads. The flame retardant material is aluminum hydroxide.
The weight ratio of the heat preservation and insulation material to the cementing material is 1.1-2.5.
The preparation of the environment-friendly cementing material-based fireproof paint comprises the following steps:
1) Grinding the regenerated micro powder, slag and glass powder with each melting point respectively for 1-4 hours at the rotating speed of 200r/min by using a ball mill;
2) Dividing the 707VAE emulsion into a 707VAE emulsion A and a 707VAE emulsion B according to a weight ratio of 3:7, and dividing the 707VAE emulsion B into a 707VAE emulsion B1 and a 707VAE emulsion B2 according to a weight ratio of 8:2; meanwhile, the acrylic emulsion is divided into acrylic emulsion A and acrylic emulsion B according to the weight ratio of 8:2; dividing the water into water A and water B according to the weight ratio of 3:7;
3) Pouring the expanded perlite into 707VAE emulsion A, stirring at 53r/min for 2min, standing for 4-6h in a curing environment with the humidity of more than or equal to 80% at 20+/-2 ℃ after stirring, and drying for 6-8h by a 60 ℃ oven to obtain modified expanded perlite;
4) Cement, anhydrous sodium sulfate, modified expanded perlite, sepiolite, aluminum hydroxide, rust inhibitor, the ground regenerated micro powder, slag and glass powder with various melting points are stirred by a mixer for 4-8 hours, so as to obtain uniformly mixed powder;
5) Adding the acrylic emulsion A, the 707VAE emulsion B1 and the hollow floating beads into the water A, and dispersing for 3-5 min at the rotating speed of 220r/min to obtain emulsion dispersion liquid A; adding 707VAE emulsion B2 and acrylic emulsion B into the emulsion dispersion liquid A, and stirring at a rotation speed of 220r/min for 1-2 min to obtain emulsion dispersion liquid B;
6) Adding the powder obtained in the step 4) into water B, stirring at a rotating speed of 62+/-5 r/min for 30s, gradually pouring into emulsion dispersion liquid B, stirring at a rotating speed of 125+/-10 r/min for 1-2 min, and finally stirring at a rotating speed of 62+/-5 r/min for 30s to obtain the environment-friendly cementing material-based fireproof coating.
The environment-friendly cementing material-based fireproof coating is a multiphase material consisting of cementing materials, expanded perlite, glass powder, dispersing agents, flame retardant materials, impervious agents and water. The regenerated micro powder and slag are easy to agglomerate after ball milling, and the powder is uniformly distributed by pre-mixing, so that the condition that the powder flies out of a stirring pot in the dry powder stirring process to cause overlarge performance differences can be avoided; and the acrylic emulsion and the 707VAE emulsion are mixed at different stirring speeds and stirring times, so that the emulsion dispersion liquid can fully perform chemical reaction and excite the activity of the emulsion dispersion liquid.
In order to make the contents of the present invention more easily understood, the technical scheme of the present invention will be further described with reference to the specific embodiments, but the present invention is not limited thereto.
Examples
The environment-friendly cementing material-based fireproof paint comprises the following raw materials in parts by weight: 183 parts of cementing material, 201 parts of heat-insulating material expanded perlite, 90 parts of high-temperature anti-stripping agent, 7 parts of anhydrous sodium sulfate of alkali-activator, 95 parts of dispersing agent hollow floating beads, 12 parts of flame-retardant material aluminum hydroxide, 407.5 parts of impervious agent and 272.5 parts of water;
wherein the cementing material consists of 43.6 parts of cement, 52.3 parts of regenerated micro powder and 87.1 parts of slag;
the high-temperature anti-stripping agent consists of 30 parts of low-melting-point glass powder, 30 parts of medium-melting-point glass powder and 30 parts of high-melting-point glass powder;
the impervious agent consists of 360.6 parts of 707VAE emulsion, 9.0 parts of acrylic emulsion, 1.8 parts of rust inhibitor and 36.1 parts of sepiolite.
The preparation of the environment-friendly cementing material-based fireproof paint comprises the following steps:
1) Grinding the regenerated micro powder, slag and glass powder with each melting point respectively for 2 hours at the rotating speed of 200r/min by using a ball mill;
2) Dividing the 707VAE emulsion into a 707VAE emulsion A and a 707VAE emulsion B according to a weight ratio of 3:7, and dividing the 707VAE emulsion B into a 707VAE emulsion B1 and a 707VAE emulsion B2 according to a weight ratio of 8:2; meanwhile, the acrylic emulsion is divided into acrylic emulsion A and acrylic emulsion B according to the weight ratio of 8:2; dividing the water into water A and water B according to the weight ratio of 3:7;
3) Pouring the expanded perlite into 707VAE emulsion A, stirring at 53r/min for 2min, standing for 6h in a curing environment with the humidity of more than or equal to 80% at 20+/-2 ℃ after stirring, and drying for 8h in a 60 ℃ oven to obtain modified expanded perlite;
4) Cement, anhydrous sodium sulfate, modified expanded perlite, sepiolite, aluminum hydroxide, rust inhibitor, the ground regenerated micro powder, slag and glass powder with various melting points are stirred for 4 hours by a mixer, so as to obtain uniformly mixed powder;
5) Adding acrylic emulsion A, 707VAE emulsion B1 and hollow floating beads into water A, and dispersing for 3min at a rotation speed of 220r/min to obtain emulsion dispersion liquid A; adding 707VAE emulsion B2 and acrylic emulsion B into emulsion dispersion liquid A, and stirring for 2min at a rotation speed of 220r/min to obtain emulsion dispersion liquid B;
6) Adding the powder obtained in the step 4) into water B, stirring at a rotating speed of 62+/-5 r/min for 30s, gradually pouring into emulsion dispersion liquid B, stirring at a rotating speed of 125+/-10 r/min for 2min, and finally stirring at a rotating speed of 62+/-5 r/min for 30s to obtain the environment-friendly cementing material-based fireproof coating.
Comparative example 1
The environment-friendly cementing material-based fireproof paint comprises the following raw materials in parts by weight: 183 parts of cementing material, 201 parts of heat-insulating material expanded perlite, 7 parts of alkali-exciting agent anhydrous sodium sulfate, 95 parts of dispersing agent hollow floating beads, 12 parts of flame-retardant material aluminum hydroxide, 407.5 parts of impervious agent and 272.5 parts of water;
wherein the cementing material consists of 43.6 parts of cement, 52.3 parts of regenerated micro powder and 87.1 parts of slag;
the impervious agent consists of 360.6 parts of 707VAE emulsion, 9.0 parts of acrylic emulsion, 1.8 parts of rust inhibitor and 36.1 parts of sepiolite.
The preparation of the environment-friendly cementing material-based fireproof coating is carried out in the same way as the example except that glass powder is not used.
Comparative example 2
The environment-friendly cementing material-based fireproof paint comprises the following raw materials in parts by weight: 183 parts of cementing material, 201 parts of heat-insulating material expanded perlite, 90 parts of high-temperature anti-stripping agent, 7 parts of anhydrous sodium sulfate of alkali-activator, 95 parts of dispersing agent hollow floating beads, 12 parts of flame-retardant material aluminum hydroxide, 407.5 parts of impervious agent and 272.5 parts of water;
wherein the cementing material consists of 43.6 parts of cement, 52.3 parts of regenerated micro powder and 87.1 parts of slag;
the high-temperature anti-stripping agent consists of 30 parts of low-melting-point glass powder, 30 parts of medium-melting-point glass powder and 30 parts of high-melting-point glass powder;
the impervious agent consists of 360.6 parts of 707VAE emulsion, 9.0 parts of acrylic emulsion, 1.8 parts of rust inhibitor and 36.1 parts of sepiolite.
The preparation of the environment-friendly cementing material-based fireproof paint comprises the following steps:
1) Grinding the regenerated micro powder, slag and glass powder with each melting point respectively for 2 hours at the rotating speed of 200r/min by using a ball mill;
2) Dividing the 707VAE emulsion into 707VAE emulsion A and 707VAE emulsion B according to the weight ratio of 8:2; meanwhile, the acrylic emulsion is divided into acrylic emulsion A and acrylic emulsion B according to the weight ratio of 8:2; dividing the water into water A and water B according to the weight ratio of 3:7;
3) Cement, anhydrous sodium sulfate, expanded perlite, sepiolite, aluminum hydroxide, a rust inhibitor, the ground regenerated micro powder, slag and glass powder are stirred for 4 hours by a mixer, so as to obtain uniformly mixed powder;
4) Adding the acrylic emulsion A, the 707VAE emulsion A and the hollow floating beads into water A, and dispersing for 3min at a rotating speed of 220r/min to obtain emulsion dispersion liquid A; adding 707VAE emulsion B and acrylic emulsion B into the emulsion dispersion liquid A, and stirring for 2min at a rotating speed of 220r/min to obtain emulsion dispersion liquid B;
5) Adding the powder obtained in the step 3) into water B, stirring at a rotating speed of 62+/-5 r/min for 30s, gradually pouring into emulsion dispersion liquid B, stirring at a rotating speed of 125+/-10 r/min for 2min, and finally stirring at a rotating speed of 62+/-5 r/min for 30s to obtain the environment-friendly cementing material-based fireproof coating.
1. The fireproof paint prepared in the embodiment and the commercial fireproof paint are respectively coated on a Q235 steel plate with the thickness of 200-500 mm and the surface treatment of 150mm multiplied by 70mm multiplied by 6 mm. After brushing, the paint is placed in an indoor environment with the temperature of 20+/-5 ℃ and the humidity of more than 70 percent for 15 days. And a small liquefied gas tank is adopted to continuously burn the coating, and the fireproof performance of the coating is reflected through the temperature of the back surface of the steel plate.
The results show that the coating formed by the fireproof paint prepared in the embodiment can enable the back temperature of the steel plate to be maintained below 350 ℃ under the condition that the gas tank flame is continuously burned for 2-3 hours, and the coating does not fall off and crack. The commercial fire retardant coating composition was then raised to 410 c and the coating was slightly cracked.
2. The fireproof coating materials prepared in example and comparative example 1 were applied to a surface-treated 70mm×70mm×6mm Q235 steel sheet with a coating thickness of 15mm. After brushing, the paint is placed in an indoor environment with the temperature of 20+/-5 ℃ and the humidity of more than 70 percent for 15 days. And (3) continuously burning the coating by adopting a small liquefied gas tank, and testing the adhesive property of the test piece after burning.
The results show that the adhesive strength of the novel environment-friendly cementing material-based fireproof paint prepared in the embodiment is 0.2MPa after combustion, and the adhesive strength of the fireproof paint prepared in the comparative example 1 after combustion is 0.06MPa, which shows that the adhesive property of the fireproof paint after heating is obviously improved by using the high-temperature anti-stripping agent.
3. The samples of the fire retardant coating cubes having dimensions of 70mm by 70mm were prepared in examples and comparative example 2, respectively, and the densities of the samples were measured after curing for 15 days in an indoor environment at 20.+ -. 5 ℃ and humidity > 70%.
The results show that the density of the test pieces of the fireproof coating prepared in the examples is 590kg/m 3 The density of the test piece of the fireproof paint prepared in comparative example 2 was 605kg/m 3 The modified perlite has the advantage that the water absorption rate of the expanded perlite can be obviously reduced.
4. The physical and chemical properties of the environment-friendly cementing material-based fireproof paint prepared in the embodiment are tested according to the corresponding national standard.
The results show that the dry density of the fireproof paint prepared in the example is less than or equal to 600kg/m 3 The method comprises the steps of carrying out a first treatment on the surface of the The compressive strength reaches 2.5MPa; the adhesive property reaches 0.3MPa; the water resistance is achieved by adopting a soaking experiment method, and the phenomena of color change, foaming, rust, falling and the like do not exist in soaking for 36 hours; the chloride ion corrosion resistance adopts a salt spray corrosion resistance method, the coating has no foaming, deterioration and softening phenomena after 60 times of tests, and the attenuation of the heat insulation efficiency is less than or equal to 35 percent. Therefore, the environment-friendly cementing material-based fireproof coating has good high-temperature spalling resistance and good fireproof effect, and various physical and chemical properties of the coating are good.
The foregoing description is only of the preferred embodiments of the invention, and all changes and modifications that come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Claims (5)

1. An environment-friendly cementing material-based fireproof coating is characterized in that: the raw materials used in the preparation method are as follows in parts by weight: 85-246.5 parts of cementing material, 135.5-440 parts of heat insulation material, 50-180 parts of high-temperature anti-stripping agent, 3-7.5 parts of alkali-exciting agent, 21.5-95 parts of dispersing agent, 5.5-12 parts of flame retardant material, 241-407.5 parts of impervious agent and 213-350 parts of water;
wherein the cementing material comprises cement, regenerated micro powder and slag in a mass ratio of 5:6:10;
the high-temperature anti-stripping agent comprises low-melting-point glass powder, medium-melting-point glass powder and high-melting-point glass powder in a mass ratio of 1:1:1;
the impervious agent comprises 707VAE emulsion, acrylic emulsion, rust inhibitor and sepiolite in a mass ratio of 200:5:1:20;
the heat preservation and insulation material is expanded perlite; the alkali-activated agent is anhydrous sodium sulfate; the dispersing agent is hollow floating beads; the flame retardant material is aluminum hydroxide.
2. An environmentally friendly cementitious material based fire retardant coating according to claim 1, wherein: the weight ratio of the heat preservation and insulation material to the cementing material is 1.1-2.5.
3. A method for preparing the environment-friendly cementing material-based fireproof paint as claimed in claim 1, which is characterized in that: the method comprises the following steps:
1) Ball milling the regenerated micro powder, slag and glass powder with each melting point respectively for 1-4 hours at the rotating speed of 200 r/min;
2) Dividing the 707VAE emulsion into a 707VAE emulsion A and a 707VAE emulsion B according to a weight ratio of 3:7, and dividing the 707VAE emulsion B into a 707VAE emulsion B1 and a 707VAE emulsion B2 according to a weight ratio of 8:2; meanwhile, the acrylic emulsion is divided into acrylic emulsion A and acrylic emulsion B according to the weight ratio of 8:2; dividing the water into water A and water B according to the weight ratio of 3:7;
3) Pouring the expanded perlite into 707VAE emulsion A, stirring at 53r/min for 2min, standing for 4-6h in a maintenance environment after stirring, and drying to obtain modified expanded perlite;
4) Cement, anhydrous sodium sulfate, modified expanded perlite, sepiolite, aluminum hydroxide, rust inhibitor, the ground regenerated micro powder, slag and glass powder with various melting points are stirred by a mixer for 4-8 hours, so as to obtain uniformly mixed powder;
5) Adding the acrylic emulsion A, the 707VAE emulsion B1 and the hollow floating beads into the water A, and dispersing for 3-5 min at the rotating speed of 220r/min to obtain emulsion dispersion liquid A; adding 707VAE emulsion B2 and acrylic emulsion B into the emulsion dispersion liquid A, and stirring at a rotation speed of 220r/min for 1-2 min to obtain emulsion dispersion liquid B;
6) And (3) adding the powder obtained in the step (4) into water B, stirring at a rotating speed of 62+/-5 r/min for 30s, gradually pouring into emulsion dispersion liquid B, stirring at a rotating speed of 125+/-10 r/min for 1-2 min, and finally stirring at a rotating speed of 62+/-5 r/min for 30s to obtain the environment-friendly cementing material-based fireproof coating.
4. The method for preparing the environment-friendly cementing material-based fireproof paint as claimed in claim 3, wherein the method comprises the following steps: the temperature of the maintenance environment in the step 3) is 20+/-2 ℃, and the humidity is more than or equal to 80%.
5. The method for preparing the environment-friendly cementing material-based fireproof paint as claimed in claim 3, wherein the method comprises the following steps: and 3) drying at 60 ℃ for 6-8 hours.
CN202310937052.0A 2023-07-28 2023-07-28 Environment-friendly cementing material-based fireproof paint and preparation method thereof Pending CN117004278A (en)

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