CN113444425A - Water-based epoxy fireproof coating and preparation method and application thereof - Google Patents
Water-based epoxy fireproof coating and preparation method and application thereof Download PDFInfo
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- 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
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
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- 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
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- 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
- C09D5/185—Intumescent paints
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- 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
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
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- 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
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/32—Phosphorus-containing compounds
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- C08K2003/322—Ammonium phosphate
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- 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
- C08K3/32—Phosphorus-containing compounds
- C08K2003/321—Phosphates
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- C08K2003/323—Ammonium polyphosphate
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/14—Polymer mixtures characterised by other features containing polymeric additives characterised by shape
- C08L2205/16—Fibres; Fibrils
Abstract
The invention discloses a water-based epoxy fireproof coating and a preparation method and application thereof. The water-based epoxy fireproof coating consists of a component A and a component B, wherein the component A comprises water-based epoxy emulsion, vinyl-epoxy emulsion, a carbon forming catalyst, a carbon forming agent, a foaming agent and a flame retardant, and the component B comprises a curing agent and a fireproof fiber. The water-based epoxy fireproof coating provided by the invention has the advantages of excellent sealing performance of both the solvent-free epoxy fireproof coating and the high-solid-content epoxy fireproof coating, brings excellent corrosion resistance, UV irradiation resistance, water resistance and organic solvent resistance, and can be used in severe outdoor environments. The self-made emulsion is preferably selected as the fireproof coating, the structure of a film forming material is optimized and adjusted, and the fireproof efficiency is high. Meanwhile, the invention selects water as the diluent, fundamentally solves the coating problem of the original epoxy fire-retardant coating, uses a water-based system which is more environment-friendly, and belongs to a new generation fire-retardant coating technology.
Description
Technical Field
The invention relates to the technical field of fireproof coatings, and further relates to a water-based epoxy fireproof coating as well as a preparation method and application thereof.
Background
The solvent-free epoxy fire-retardant coating or the high-solid epoxy fire-retardant coating sold in the market at present has excellent sealing property and environmental resistance, can resist acid, alkali, salt mist, solvent oil, aging and chemicals, and has the service cycle of more than 20 years. High fireproof performance, high paint film strength and strong corrosion resistance, and can be widely applied to outdoor and marine environments and petrochemical industries. Meanwhile, the epoxy fire-retardant coating has higher strength of the expanded carbon layer, can effectively resist flame with heat impact, and can provide effective fire protection in hydrocarbon fires and jet hydrocarbon fires (explosions).
However, the epoxy fire-retardant coating has the advantages of high viscosity, short pot life and poor construction performance. Special spraying equipment is required during spraying construction, and the device is large in size and not suitable for transportation; the working life of construction needs to be considered during manual construction, the viscosity is high, uniform mixing is not easy, and the brushing efficiency is low. The international coating product tends to pay more attention to green and environment protection, while the traditional solvent-free epoxy fire-retardant coating and high-solid-content epoxy fire-retardant coating need to reduce viscosity when in use, and need to add organic diluent, thus causing secondary environmental pollution during construction.
Therefore, an epoxy fireproof coating which is more environment-friendly and suitable for severe outdoor environment is urgently needed at present.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a water-based epoxy fireproof coating and a preparation method and application thereof. The fireproof coating comprises a component A and a component B, wherein the component A comprises a water-based epoxy emulsion, a vinyl-epoxy emulsion, a carbon forming catalyst, a carbon forming agent, a foaming agent and a flame retardant, and the component B comprises a curing agent and a fireproof fiber. The water-based epoxy fireproof coating provided by the invention has the advantages of excellent sealing performance of both the solvent-free epoxy fireproof coating and the high-solid-content epoxy fireproof coating, brings excellent corrosion resistance, UV irradiation resistance, water resistance and organic solvent resistance, and can be used in severe outdoor environments. Meanwhile, water is selected as a diluent in the technology, so that the technology is green, environment-friendly and pollution-free. In addition, the water-based epoxy fire-retardant coating has low viscosity and long working life. The paint can be sprayed, brushed, rolled, trowelled and other construction modes, and universal small spraying equipment can be selected for construction during spraying, so that the paint is simple, convenient and fast; the artificial construction is not different from the common coating. The invention fundamentally solves the coating problem of the original epoxy fire-retardant coating, uses a water-based system which is more environment-friendly, and belongs to a new generation fire-retardant coating technology.
The invention aims to provide a water-based epoxy fire-retardant coating.
The water-based epoxy fireproof coating consists of a component A and a component B;
the component A comprises: water-based epoxy emulsion, vinyl-epoxy emulsion, carbon forming catalyst, carbon forming agent, foaming agent and flame retardant;
the components are calculated according to the parts by weight,
100 parts of water-based epoxy emulsion;
0-100 parts by weight of a vinyl-epoxy emulsion; preferably 0 to 40 parts by weight; more preferably 1 to 40 parts by weight;
the component B comprises: a curing agent and a refractory fiber;
based on 100 parts by weight of the water-based epoxy emulsion,
20-200 parts by weight of a curing agent; preferably 20 to 160 parts by weight;
5-80 parts by weight of refractory fiber; preferably 2 to 60 parts by weight;
the weight ratio of the component A to the component B is (1-10) to 1; preferably (1-6): 1.
In a preferred embodiment of the present invention,
in the component A, the component A is a mixture of,
the waterborne epoxy emulsion is at least one of epoxy resin aqueous dispersion, polyester modified epoxy emulsion, polyether modified epoxy emulsion, aliphatic epoxy emulsion, alicyclic epoxy emulsion, polyfunctional epoxy emulsion, hyperbranched epoxy emulsion, modified epoxy emulsion A and modified epoxy emulsion B. When flame combustion is carried out, unreacted epoxy groups and terminal hydroxyl groups in the epoxy emulsion can participate in a carbon forming reaction under the action of a carbon forming catalyst to form a part of an expanded carbon layer, so that the fire resistance is improved; meanwhile, the epoxy emulsion is selected, so that the water-based fireproof coating has relatively good fluidity, and the construction performance of the fireproof coating is optimized.
The modified epoxy emulsion A is prepared from an emulsifier, a cosolvent, deionized water and modified epoxy resin A;
the modified epoxy resin A is prepared from dihydric alcohol, dihydric phenol and polyhydric glycidyl ether;
the dihydric alcohol is at least one of 1, 3-butanediol, 1, 4-butanediol, 1, 3-cyclohexanediol, 1, 4-cyclohexanediol, 1, 2-pentanediol, neopentyl glycol, 1, 7-heptanediol, 3, 5-heptanediol, 2, 6-dimethyl-2, 6-heptanediol, 4-ethyl-3, 5-heptanediol, isohexodiol, 2, 4-hexanediol, 3, 6-octanediol, 1, 8-octanediol, 1, 9-nonanediol and glycol amine;
the dihydric phenol is at least one of resorcinol, hydroquinone, 2-methyl resorcinol, bisphenol A and derivatives thereof, and bisphenol F and derivatives thereof;
the polyhydric glycidyl ether is preferably at least one of glycerol triglycidyl ether, pentaerythritol tetraglycidyl ether, pentaerythritol triglycidyl ether, trimethylolpropane triglycidyl ether, trimethylolethane triglycidyl ether, N, N, N ', N ' -tetracyclooxypropyl-4, 4' -diaminodiphenylmethane, 4, 5-epoxycyclohexane-1, 2-dicarboxylic acid diglycidyl ester, poly [ (2-oxiranyl) -1, 2-cyclohexanediol ] 2-ethyl-2- (hydroxymethyl) -1, 3-propanediol ether (3:1), triglycidyl-p-aminophenol;
the modified epoxy emulsion A is preferably prepared by the following method:
(1)N2protecting, stirring at high speed, gradually heating to 40-100 deg.C to remove dihydric alcoholCompletely dissolving in the poly glycidyl ether, then dropwise adding an organic solution of a catalyst, keeping the temperature of the system at 70-150 ℃, after polymerization reaction for 6-72 h, adding the dihydric phenol, dropwise adding the catalyst, and performing polymerization reaction for 3-48 h at 70-150 ℃. And after the polymerization is finished, washing the obtained product for 3-5 times by using ethanol, and drying the obtained product to obtain the modified epoxy resin A.
(2) And (3) fully dissolving the emulsifier and the cosolvent in deionized water under high-speed dispersion, slowly adding the modified epoxy resin A at normal temperature or at the temperature of 40-60 ℃, and gradually adding the deionized water to adjust the solid content to be 35-65% to obtain the pre-emulsion. And (3) homogenizing the pre-emulsion by using a homogenizer to obtain the modified epoxy emulsion A.
Wherein the molar ratio of the dihydric alcohol to the dihydric phenol is 1: 0.1-1: 2. the molar ratio of the epoxy group to the total amount of the alcoholic hydroxyl group and the phenolic hydroxyl group is 1: 0.3-1: 3.
the modified epoxy emulsion B is prepared from an emulsifier, a cosolvent, deionized water and modified epoxy resin B;
the modified epoxy resin B is prepared by using polyhydric phenol modified bifunctionality epoxy resin;
the polyhydric phenol is at least one of triphenol methane, tetraphenol ethane and 1,1,2, 2-tetra (4-hydroxyphenyl) ethane;
the bifunctional epoxy resin is bis (2-epoxypropyl) ether, 1, 4-butanediol diglycidyl ether, bis ((3, 4-epoxycyclohexyl) methyl) adipate, 3, 4-epoxycyclohexylmethyl-3, 4-epoxycyclohexane formate, tetrahydrophthalic acid diglycidyl ester and hexahydrophthalic acid diglycidyl ester, at least one of dicyclopentadiene dioxide, bis (7-oxabicyclo [4.1.0] 3-heptamethyl) adipate, diglycidyl 4, 5-epoxytetrahydrophthalate, diglycidyl cyclohexane-1, 2-dicarboxylate, 1, 4-cyclohexanedimethanol bis (3, 4-epoxycyclohexanecarboxylate), and 3,3' - [ oxybis-methylene ] bis [ 3-ethyl ] oxetane;
the modified epoxy emulsion B is preferably prepared by the following method:
(1)N2protecting, stirring at high speed, gradually heating to 40-80 deg.C to obtain multicomponent powderUniformly mixing phenol and epoxy resin with binary functionality in an organic solvent, then dropwise adding an organic solution of a catalyst, keeping the temperature of the system at 80-150 ℃, and carrying out polymerization reaction for 6-72 hours. And after the polymerization is finished, washing the obtained product for 3-5 times by using ethanol, and drying the obtained product to obtain the modified epoxy resin B.
(2) And (3) fully dissolving the emulsifier and the cosolvent in deionized water under high-speed dispersion, slowly adding the modified epoxy resin B which is at the normal temperature or is heated to 40-60 ℃, and gradually adding the deionized water to adjust the solid content to be 35-65% to obtain the pre-emulsion. And (3) homogenizing the pre-emulsion by using a homogenizer to obtain the modified epoxy emulsion B.
Wherein the molar ratio of the epoxy group to the phenolic hydroxyl group is 1: 1.5-1: 0.5.
the cosolvent, the emulsifier, the organic solvent and the catalyst in the modified epoxy emulsion A and the modified epoxy emulsion B are the same or different and are independently selected from the following groups:
the cosolvent is at least one of ethylene glycol methyl ether, ethylene glycol ethyl ether, ethylene glycol propyl ether, ethylene glycol butyl ether, ethylene glycol tert-butyl ether, diethylene glycol butyl ether, propylene glycol methyl ether acetate, propylene glycol butyl ether, dipropylene glycol methyl ether and dipropylene glycol butyl ether;
the emulsifier is an anionic emulsifier or a nonionic emulsifier; the anionic emulsifier is preferably alkyl sulfonate, including but not limited to, at least one of sodium dodecyl benzene sulfonate, sodium dodecyl sulfate and potassium dodecyl sulfate; the non-ionic emulsifier is preferably at least one of fatty alcohol-polyoxyethylene ether and alkylphenol ethoxylates;
the organic solvent is one or a composition of more than two of N, N-dimethylformamide, N-dimethylacetamide, propylene glycol methyl ether and ethylene glycol dibutyl ether;
the catalyst is one or a composition of more than two of potassium tert-butoxide, tetrabutylammonium hydroxide, tetrabutylammonium bromide, tetrabutylammonium chloride, ethyl triphenyl phosphonium bromide, 2-ethyl-4-methylimidazole, triphenyl phosphonium, triphenyl phosphine and benzyl dimethylamine.
In a preferred embodiment of the present invention,
the vinyl-epoxy emulsion is prepared from epoxy resin, a vinyl monomer, an emulsifier, a catalyst A and water; the vinyl-epoxy emulsion is a hybrid emulsion, so that the flame retardance of the emulsion can be improved, the Tg of the emulsion can be improved, the emulsion is more matched with an expansion flame-retardant system, and the fire resistance is improved.
The vinyl monomer is at least one of vinyl acetate, vinyl versatate, 2-hydroxyethyl acrylate, butyl acrylate, vinyl methacrylate, vinyl acrylate, vinyl caprylate, allyl vinyl ester, vinyl valerate, vinyl pivalate, vinyl acetate, vinyl n-butyrate, vinyl isobutyrate, vinyl oleate, vinyl laurate and vinyl benzoate;
the epoxy resin is at least one of bisphenol A epoxy resin, bisphenol F epoxy resin and micromolecular glycidyl ether;
the emulsifier is an anionic emulsifier or a nonionic emulsifier as described above; the anionic emulsifier is preferably alkyl sulfonate, including but not limited to, at least one of sodium dodecyl benzene sulfonate, sodium dodecyl sulfate and potassium dodecyl sulfate; the non-ionic emulsifier is preferably at least one of fatty alcohol-polyoxyethylene ether and alkylphenol ethoxylates;
the catalyst A is at least one of ammonium persulfate, potassium persulfate, tetrabutylammonium bromide, methyl triphenyl phosphonium bromide, propyl triphenyl phosphonium bromide, boron trifluoride ethyl ether, 2-ethyl-4-methylimidazole, triphenyl phosphorus, triphenyl phosphine, benzyl dimethylamine, di-tert-butyl peroxide, dibenzoyl peroxide and azodiisobutyronitrile.
The vinyl-epoxy emulsion is preferably prepared by the following method:
(1) dissolving epoxy resin into one or more mixed vinyl monomers, and completely dissolving the epoxy resin under the high-speed dispersion of 600-2000 rad to form a premixed solution;
(2) under high-speed dispersion, uniformly dispersing an emulsifier in deionized water;
(3) slowly adding the premixed solution in the step (1) into the step (2) under high-speed dispersion to obtain a pre-emulsion;
(4) preparing an aqueous dispersion of a catalyst A, wherein the concentration of the catalyst A is 3-20%;
(5)N2protecting, adding 10-40% of (3) into a reaction kettle under high-speed dispersion, heating to 40-80 ℃, dropwise adding 20-30% of (4) into the reaction kettle to obtain a seed emulsion, then keeping the system temperature at 60-90 ℃, gradually dropwise adding the rest (3) and (4) into the seed emulsion, and continuing to keep polymerization for 0.5-4 h after dropwise adding is finished to obtain the vinyl-epoxy emulsion.
Wherein the weight ratio of the epoxy resin to the vinyl monomer is 30: 70-60: 40.
in a preferred embodiment of the present invention,
the carbon forming catalyst is at least one of phosphate, sulfonate, 9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide and derivatives thereof; preferred are monoammonium phosphate, urea phosphate, ammonium polyphosphate, potassium tripolyphosphate, melamine phosphate, dimlamine phosphate, melamine pyrophosphate, organic phosphate, tris (2-chloroethyl) phosphate, tris (2-chloropropyl) phosphate, triethyl phosphate, triphenyl phosphate, tricresyl phosphate, t-butylphenyl diphenyl phosphate, tris (1, 3-dichloroisopropyl) phosphate, trimethyl phosphate, tributoxyethyl phosphate, trixylenyl phosphate, cresyl diphenyl phosphate, triisopropylphenyl phosphate, isopropylated triphenyl phosphate, triaryl phosphate, isopropyl phosphate, diphenylisodecyl phosphate, diphenylisooctyl phosphate, triisobutyl phosphate, resorcinol-bis (diphenyl phosphate), bisphenol A-bis (diphenyl phosphate), dimethyl methylphosphonate, dimethyl tripolyphosphate, and dimethyl phosphate, At least one of dimethylpropyl phosphonate and diethyl ethylphosphate; the carbon forming catalyst is one of important components of the intumescent fire-retardant coating and participates in the carbon forming process of the fire-retardant coating; and/or the presence of a gas in the gas,
the carbon forming agent is at least one of starch, cellulose and derivatives, sucrose, sorbitol, xylitol, polysaccharide compounds, pentaerythritol and derivatives, hydroxyl-containing lactone compounds, chitosan and cyclodextrin, more preferably selected from pentaerythritol and derivatives, the pentaerythritol and the derivatives have the advantages of low hydrophilicity and high thermal stability, the carbon forming agent forms an expanded carbon layer skeleton structure at high temperature, the expanded carbon layer is compact and uniform in interior and has certain strength and adhesive force, and the carbon forming agent is decomposed at high temperature or catalyzed by a carbon forming catalyst to form the expanded carbon layer, so that the carbon forming agent is matched with the carbon forming catalyst at the decomposition temperature; and/or the presence of a gas in the gas,
the foaming agent is at least one of melamine compounds and derivatives thereof and metal hydroxides; preferably at least one of melamine, melamine phosphate, aluminum hydroxide and magnesium hydroxide, wherein the foaming agent is decomposed at high temperature to release non-combustible gas, such as hydrogen halide, ammonia gas, nitrogen and oxides thereof, water vapor, carbon dioxide and the like, the foaming agent has the following effects that the foaming agent has certain flame retardant effect, the generated non-combustible gas absorbs heat generated during combustion during decomposition, the generated non-combustible gas dilutes thick smoke generated during combustion, the gas can also enable the expanded carbon layer to form a loose foam-like structure, internal non-convective air can reduce the heat conductivity of the expanded carbon layer and increase the fireproof performance, 2-3 foaming agents are selected to be matched to realize gradient foaming of the fireproof coating, the fireproof performance of the coating is increased, the expansion height of the coating can be adjusted by adjusting the using amount of the foaming agent, but the expanded carbon layer cannot be too high, the strength of the expanded carbon layer can be reduced by too high foaming, and the carbon layer can fall off from the base material, the fireproof performance is lost, and certain foaming agents have the functions of carbon formation and catalysis, wherein both aluminum hydroxide and magnesium hydroxide are filler type flame retardant foaming agents, are halogen-free, non-toxic and smoke-inhibiting, and generate steam through decomposition and heat absorption so as to dilute and play roles in flame retardant efficiency and expansion; and/or the presence of a gas in the gas,
the flame retardant is at least one of aluminum hydroxide, magnesium hydroxide, zinc borate, antimony trioxide, titanium dioxide, zinc oxide, molybdenum oxide, ammonium octamolybdate, polysilsesquioxane and derivatives thereof, chitin flame retardant, aluminum hypophosphite and derivatives thereof, tetraphenyl phosphine chloride, triphenylphosphine oxide, phenyl phosphorus dichloride, triphenyl phosphorus dichloride, diphenyl phosphorus oxide, diphenyl phosphorus chloride, 2-carboxyethyl phenyl phosphinic acid, hexaphenoxycyclotriphosphazene and phenyl dichlorophosphate. The flame retardant may generate non-combustible gas by desorption heat, decompose to generate free radicals, or have other flame retardant principles. The flame retardant can reduce the self combustion of the coating, prolong the response time of the fireproof coating and assist the carbon forming reaction of the fireproof coating. The invention can adopt a method of compounding a plurality of flame retardants into a carbon catalyst for use so as to play a synergistic flame-retardant effect.
In a preferred embodiment of the present invention,
the component A also comprises toughening emulsion, cosolvent, film-forming assistant, assistant and deionized water. The toughening emulsion, the cosolvent, the film-forming assistant and the assistant which are conventional in the field can be adopted, and the dosage of the toughening emulsion, the cosolvent, the film-forming assistant and the assistant is also conventional, and can be determined by a skilled person according to the actual situation.
In the present invention, it is preferable that:
the toughening emulsion is a single-component emulsion, preferably an acrylic emulsion, a styrene-butadiene emulsion, an EVA emulsion, an epoxy ester emulsion, a chlorine partial emulsion or a chlorine-vinegar emulsion. Because the pigment ratio of the water-based epoxy fireproof coating is higher, the paint film has high hardness but insufficient flexibility, the toughening emulsion can be used for improving the flexibility of the fireproof coating paint film, and participates in a carbon forming reaction in a fire disaster to form a part of an expanded carbon layer, so that the compactness of the expanded carbon layer is improved.
The cosolvent is at least one of ethylene glycol methyl ether, ethylene glycol ethyl ether, ethylene glycol propyl ether, ethylene glycol butyl ether, ethylene glycol tert-butyl ether, diethylene glycol butyl ether, propylene glycol methyl ether acetate, propylene glycol butyl ether, dipropylene glycol methyl ether and dipropylene glycol butyl ether;
the film-forming aid is preferably alcohol ester twelve;
the auxiliary agent can adopt the auxiliary agent which is conventional in the field, such as: at least one of a leveling agent, a dispersing agent, a coupling agent, a defoaming agent and a smoke suppressant; the skilled person can add this according to the actual situation.
In the present invention, the amount is preferably as follows:
based on 100 parts by weight of the water-based epoxy emulsion,
the solid content of the toughening emulsion is preferably 35-65%.
In a preferred embodiment of the present invention,
in the component B, the component B is a mixture of,
the curing agent is at least one of an emulsion curing agent and a non-emulsion curing agent, and preferably at least one of polyamide, polyether amine, cardanol modified amine, aliphatic amine, alicyclic amine, isocyanate modified amine and polyamine modified curing agent; the curing agent is selected mainly based on the following consideration that the molecules of the curing agent contain flexible long chains, and the flexible long chains are properly introduced due to the high pigment ratio of the fireproof coating, so that the brittleness of a paint film can be improved, and the problem of paint film cracking in use can be prevented; the molecules of the curing agent contain rigid short chains and a proper amount of short chains of rigid groups, so that the hardness of the paint film can be improved, and the wear resistance of the paint film can be improved; the molecular structure of the curing agent contains benzene rings and saturated carbon atoms which are beneficial to carbon formation, so that the number of ether bonds, ester bonds and unsaturated bonds is reduced, the molecular chain breakage of a film-forming material during flame combustion can be reduced, and the generation of smoke is reduced; the curing speed is moderate, and the working life of the coating is adjustable; the curing system is non-toxic, and does not generate low molecular pollutants during curing; the polyamine curing agent increases the crosslinking degree of a paint film, improves the sealing property of the paint film and improves the medium resistance.
The polyamine modified curing agent is prepared from diamine, micromolecular polyamine and bifunctional epoxy resin in the presence of an organic solvent A;
the diamine includes, but is not limited to, hydrazine, ethylenediamine, 1, 3-propylenediamine, hexamethylenediamine, hydroxyethylethylenediamine, N '-diethyl-1, 3-propylenediamine, 2-methylpentanediamine, 2-methyl-1, 5-diaminopentane, isophoronediamine, methylcyclopentanediamine, 1, 3-cyclopentediamine, 1, 2-cyclohexanediamine, 1, 4-cyclohexanediamine, 2-methyl-1, 3-cyclohexanediamine, 1-methyl-2, 4-cyclohexanediamine, 1- (aminomethyl) cyclopentylamine, 1- (aminomethyl) -N-methylcyclopentylamine, 4' -diaminodicyclohexylmethane, 3 '-dimethyl-4, 4' -diaminodicyclohexylmethane, one or more of N, N '-dimethyl-1, 2-cyclopentediamine, N' -dimethyl-1, 2-cyclohexanediamine and 2-aminocyclopentylmethylamine;
the small molecular polyamine comprises but is not limited to one or a combination of more than two of diethylenetriamine, triethylene tetramine and tetraethylene pentamine;
the bifunctional epoxy resin is bis (2-epoxypropyl) ether, 1, 4-butanediol diglycidyl ether, bis ((3, 4-epoxycyclohexyl) methyl) adipate, 3, 4-epoxycyclohexylmethyl-3, 4-epoxycyclohexyl formate, tetrahydrophthalic acid diglycidyl ester and hexahydrophthalic acid diglycidyl ester as described above, at least one of dicyclopentadiene dioxide, bis (7-oxabicyclo [4.1.0] 3-heptamethyl) adipate, diglycidyl 4, 5-epoxytetrahydrophthalate, diglycidyl cyclohexane-1, 2-dicarboxylate, 1, 4-cyclohexanedimethanol bis (3, 4-epoxycyclohexanecarboxylate), and 3,3' - [ oxybis-methylene ] bis [ 3-ethyl ] oxetane;
the organic solvent A is one or a composition of more than two of ethylene glycol methyl ether, ethylene glycol ethyl ether, ethylene glycol propyl ether, ethylene glycol butyl ether, ethylene glycol tert-butyl ether, diethylene glycol butyl ether, propylene glycol methyl ether acetate, propylene glycol butyl ether, dipropylene glycol methyl ether and dipropylene glycol butyl ether;
the polyamine modified curing agent is preferably prepared by the following method:
(1) preparing an organic solution of diamine;
(2) preparing organic solution of micromolecular polyamine;
(3) under high-speed stirring, keeping the temperature at 40-70 ℃, completely dissolving the bifunctional epoxy resin in the organic solvent A, then dropwise adding the (1), and reacting for 0.5-2 h; and (3) continuously dropwise adding the (2) to react for 2-6 h. And precipitating the product, and respectively washing with alcohol, water and drying to obtain the polyamine modified curing agent.
Wherein the molar ratio of the bifunctional epoxy resin to the diamine is 1: 0.3-1: 1; the molar ratio of the bifunctional epoxy resin to the small molecular polyamine is 1: 0.01-1: 0.4.
in a preferred embodiment of the present invention,
the refractory fiber is preferably a fiber material which can resist the temperature of 1200 ℃, and more preferably at least one of aluminum silicate fiber, alumina fiber, carbon fiber, mullite fiber, quartz fiber and basalt fiber. The refractory fiber is used for increasing the strength and the uniformity of the expanded carbon layer and increasing the residual carbon content of the fireproof coating, and the chopped refractory fiber is preferably selected and is suitable for spraying construction.
In a preferred embodiment of the present invention,
the component B also comprises pigment and filler. The pigments and fillers are used in amounts conventional in the art and may be determined by the skilled artisan based on the circumstances.
In the present invention, it is preferable that:
the pigment and filler can be preferably selected from at least one of titanium dioxide, zinc oxide, alumina, light calcium carbonate, kaolin, feldspar powder, mica powder, talcum powder, carbon black, aramid fiber, lignin fiber and cellulose fiber; the amount of the pigment and the filler is preferably 0-40 parts by weight; the pigment and the filler can improve the sealing property, the coating strength, the medium resistance, the aging resistance and the like of the coating.
The second purpose of the invention is to provide a preparation method of the fireproof coating.
The preparation method comprises the following steps:
the component A and the component B are mixed according to the dosage of each component, and then the component A and the component B are mixed according to the dosage ratio to prepare the waterborne epoxy fireproof coating.
The following specific technical scheme is preferably adopted:
mixing the component A according to the using amount, dispersing uniformly by high stirring, grinding by a sand mill, controlling the fineness to be less than or equal to 90 mu m, discharging and packaging.
Mixing the components of the component B except the refractory fiber according to the dosage, dispersing uniformly by high stirring, grinding by a sand mill, controlling the fineness to be less than or equal to 90 mu m, adding the refractory fiber according to the dosage, dispersing uniformly by high stirring, discharging and packaging.
When in use, the component A and the component B are mixed according to the proportion to prepare the water-based epoxy fire-retardant coating.
It is a further object of the present invention to provide the use of the fire retardant coating of one of the objects of the present invention in harsh outdoor environments.
The invention has the beneficial effects that:
1. the waterborne epoxy fireproof coating provided by the invention adopts a waterborne system, so that the coating is environment-friendly and pollution-free;
2. the preparation method provided by the invention is simple and easy to operate, and has wide application prospect, and raw materials are easy to obtain;
3. the water-based epoxy fireproof coating provided by the invention has excellent sealing property, brings excellent corrosion resistance, organic solvent resistance, heat exposure resistance, heat and humidity resistance and freeze-thaw cycle resistance, and can be used in severe outdoor environment;
4. the water-based epoxy fireproof coating provided by the invention has the advantages of low viscosity, long applicable period and simple and convenient construction.
The self-made emulsion is preferably selected as the fireproof coating, the structure of a film forming material is optimized and adjusted, and the fireproof efficiency is high. The water-based fireproof coating has excellent protection effect on fire, especially hydrocarbon fire, and is more suitable for outdoor severe environment.
Detailed Description
While the present invention will be described in detail with reference to the following examples, it should be understood that the following examples are illustrative of the present invention and are not to be construed as limiting the scope of the present invention.
The raw materials used in the examples are all conventional commercially available raw materials.
Example 1
Component A
TABLE 1 raw materials and amounts used for component A in example 1
B component
TABLE 2 raw materials and amounts used for component B in example 1
And (3) synthesizing vinyl-epoxy emulsion in the component A:
(1) 220g of bisphenol F type epoxy resin was dissolved in a monomer of 86g of vinyl acetate and 198g of vinyl versatate, and the epoxy resin was completely dissolved by high-speed dispersion at 600rad to form a premix
(2) Under high speed dispersion, 25g of Calimuse AOS emulsifier and 15g of OP-15 emulsifier are uniformly dispersed in 400g of deionized water
(3) Slowly adding the premix in the step (1) into the premix in the step (2) under high-speed dispersion to obtain a pre-emulsion
(4) 20g of a 5% aqueous solution of ammonium persulfate was prepared
(5)N2Protecting, dispersing at a high speed, adding 25% of (3) into a reaction kettle, heating to 50 ℃, dropwise adding 20% of (4) into the reaction kettle to obtain a seed emulsion, then keeping the system temperature at 75-90 ℃, gradually dropwise adding the rest of (3) and (4) into the seed emulsion, continuously keeping a polymerization reaction for 2.5 hours after dropwise adding, adding ammonia water to adjust the pH value, and adding deionized water to adjust the solid content to be 45 +/-2%, thus obtaining the vinyl-epoxy emulsion.
Preparing the water-based epoxy fire-retardant coating:
respectively and uniformly mixing the raw materials to obtain a component A and a component B, and mixing A, B according to the weight ratio of 3: the ratio of 1 was used. The test properties are shown in Table 3, and the test thicknesses are 2mm except for the flameproof properties.
TABLE 3 test results of the waterborne epoxy fire-retardant coating obtained in example 1
Example 2
Component A
TABLE 4 raw materials and amounts used for component A in example 2
B component
TABLE 5 raw materials and amounts used for component B in example 2
And (3) synthesizing vinyl-epoxy emulsion in the component A:
(1) 235g of bisphenol A type epoxy resin was dissolved in 112g of vinyl methacrylate and 196g of vinyl acrylate, and the epoxy resin was completely dissolved by high-speed dispersion at 2000rad to form a premix
(2) Under high-speed dispersion, 35g of the emulsifier Calimuse PR and 40g of the emulsifier TX-15 are uniformly dispersed in 600g of deionized water
(3) Slowly adding the premix in the step (1) into the premix in the step (2) under high-speed dispersion to obtain a pre-emulsion
(4) A24 g deionized water solution of 7% tetrabutylammonium bromide was prepared
(5)N2Protection, under high speed dispersion, 40% of (3) is added to the reactionHeating the mixture in a kettle to 40 ℃, dropwise adding 30% of (4) into the reaction kettle to obtain a seed emulsion, keeping the temperature of the system at 80-90 ℃, gradually dropwise adding the rest (3) and (4) into the seed emulsion, continuously keeping the polymerization reaction for 2.5 hours after the dropwise adding is finished, adding ammonia water to adjust the pH value, and adding deionized water to adjust the solid content to be 50 +/-2%, thus obtaining the vinyl-epoxy emulsion.
Preparing the water-based epoxy fire-retardant coating:
respectively and uniformly mixing the raw materials to obtain a component A and a component B, and mixing the A, B components according to the weight ratio of 5: the ratio of 1 was used. The properties of the tested waterborne epoxy fire-retardant coatings are shown in table 6. Except for the fire resistance, the test thickness was 2 mm.
TABLE 6 test results of the waterborne epoxy fire-retardant coating obtained in example 2
Example 3
Component A
TABLE 7 starting materials and amounts used for component A in example 3
B component
TABLE 7 materials and amounts used for component B in example 3
20 parts by weight of polyamine modified curing agent
Cellulose fiber 10 parts by weight Changzhou Zhuwei
10 parts by weight of basalt fiber Changzhouzhuwei
Synthesizing modified epoxy emulsion A in the component A:
(1)N2protection, gradual heating to 80 ℃ with high-speed stirring, complete dissolution of 118g of 2, 4-hexanediol in 212g of trimethylolethane triglycidyl ether, and subsequent dropwise addition of 12g of N, N-dimethylformamide with 5% strength tetrabutylammonium bromideAnd (2) keeping the temperature of the amine solution at 80-100 ℃, after 18h of polymerization reaction, adding 228g of bisphenol A and 110g of resorcinol, continuously dropwise adding 10g of N, N-dimethylformamide solution of 5% tetrabutylammonium bromide, and performing polymerization reaction for 22h at 80-120 ℃. And after the polymerization is finished, washing the mixture for 3 times by using ethanol, and drying the mixture to obtain the modified epoxy resin A.
(2) Under high-speed dispersion, 50g of sodium dodecyl benzene sulfonate and 150g of ethylene glycol tert-butyl ether are fully dissolved in 400g of deionized water, 400g of modified epoxy resin A heated to 60 ℃ is slowly added, ammonia water is added to adjust the pH value, and deionized water is gradually added to adjust the solid content to be 49 +/-2%, so that the pre-emulsion is obtained. And (3) homogenizing the pre-emulsion by using a homogenizer to obtain the modified epoxy emulsion A.
And (3) synthesizing a polyamine modified curing agent in the component B:
the polyamine modified curing agent is a modified curing agent obtained by the reaction of polyamine and epoxy resin, and the specific synthetic method is as follows,
(1) 75g of N, N' -dimethyl-1, 2-cyclohexanediamine and 50g of hexamethylenediamine solvent were dissolved in 200g of propylene glycol monomethyl ether acetate with stirring,
(2) preparing 50g of 20 percent propylene glycol monomethyl ether acetate solution of tetraethylenepentamine
(3) Under high-speed stirring, keeping the temperature at 50 ℃, completely dissolving 320g of hexahydrophthalic acid diglycidyl ester in 400g of propylene glycol monomethyl ether acetate, and then dropwise adding the (1) to react for 2 hours; and (2) continuing to dropwise add, and reacting for 4 h. And precipitating the product, and respectively washing with alcohol, water and drying to obtain the polyamine modified curing agent.
Preparing the water-based epoxy fire-retardant coating:
respectively and uniformly mixing the raw materials to obtain a component A and a component B, and mixing the A, B components according to the weight ratio of 6: the ratio of 1 was used. The properties of the tested waterborne epoxy fire-retardant coatings are shown in table 8. Except for the fire resistance, the test thickness was 2 mm.
TABLE 8 test results of the waterborne epoxy fire-retardant coating obtained in example 3
Example 4
Component A
TABLE 9 starting materials and amounts used for the A component of example 4
B component
TABLE 9 raw materials and amounts used for the B component in example 4
Synthesizing a modified epoxy emulsion B in the component A:
(1)N2and (2) protecting, gradually heating to 70 ℃ under high-speed stirring, uniformly mixing 398g of 1,1,2, 2-tetra (4-hydroxyphenyl) ethane and 398g of 4, 5-epoxy tetrahydrophthalic acid diglycidyl ester in 1000g of ethylene glycol dibutyl ether, then dropwise adding 20g of ethylene glycol dibutyl ether solution of 8% ethyl triphenyl phosphonium bromide, keeping the temperature of the system at 90-110 ℃, and carrying out polymerization reaction for 36 hours. And after the polymerization is finished, washing the mixture for 5 times by using ethanol, and drying the mixture to obtain the modified epoxy resin B.
(2) Under high-speed dispersion, 250g of sodium dodecyl sulfate and 150g of ethylene glycol monobutyl ether are fully dissolved in 1000g of deionized water, modified epoxy resin B at 40 ℃ is slowly added, ammonia water is added to adjust the pH value, and deionized water is gradually added to adjust the solid content to be 45 +/-2%, so that pre-emulsion is obtained. And (3) homogenizing the pre-emulsion by using a homogenizer to obtain the modified epoxy emulsion B.
Preparing the water-based epoxy fire-retardant coating:
respectively and uniformly mixing the raw materials to obtain a component A and a component B, and mixing the A, B components according to the weight ratio of 4: the ratio of 1 was used. The properties of the aqueous epoxy fire-retardant coating were tested as shown in table 10. Except for the fire resistance, the test thickness was 2 mm.
TABLE 10 test results of the waterborne epoxy fire-retardant coating obtained in example 4
Comparative example 1
(1) Adding 47.2g of sodium hydroxide and 110.4g of water into a beaker, and stirring and dissolving to obtain a sodium hydroxide aqueous solution; adding 317.6g of tetrabromobisphenol A into a three-necked bottle, adding 324.8g of epoxy chloropropane into the bottle, stirring, heating to 70-75 ℃ to completely dissolve the tetrabromobisphenol A, cooling to 50-55 ℃, starting to dropwise add 178g of sodium hydroxide aqueous solution, completing dropwise addition within 3-4 hours, heating to 55-60 ℃ for reaction for 4 hours, heating to 65-70 ℃, dropwise adding the residual sodium hydroxide aqueous solution, completing dropwise addition within 1 hour, reacting at 68-73 ℃ for 3-4 hours, adding benzene and water for cooling, standing for layering, draining the water layer, washing with water to be neutral, dehydrating under normal pressure, reducing the pressure to 20kPa when the liquid temperature is increased to more than 110 ℃, gradually heating to 125-140 ℃ without liquid distillation, discharging and cooling to obtain the tetrabromobisphenol A epoxy resin.
(2) Adding 53g of polyethylene glycol with the average relative molecular mass of 800 and 26g of the tetrabromobisphenol A epoxy resin into a three-necked bottle, introducing inert gas into the bottle, heating to 74-76 ℃, adding 1g of catalyst, controlling the reaction temperature at 95-100 ℃, reacting for 5 hours, adding 20g of water, and stirring until the mixture is completely dissolved to obtain the bromine carbon reactive emulsifier.
(3) Adding 440g of tetrabromobisphenol A epoxy resin and 80g of composite cosolvent into a three-necked bottle, stirring and dissolving, adding 80g of bromocarbon reactive emulsifier, dispersing at a high speed, slowly adding 200g of water, continuing stirring for 5-10 minutes after the addition is finished, and stopping stirring to obtain the stable oil-in-water type aqueous bromocarbon epoxy resin emulsion.
(4) 53.6g of tetrabromobisphenol A epoxy resin, 1.6g of dispersing agent, 48g of titanium dioxide, 32g of lithopone, 32g of precipitated barium sulfate and 32g of talcum powder are added into an enamel cylinder for high-speed stirring to be uniformly dispersed, the mixture is ground on a conical mill to the fineness of less than 35 mu m, 16g of film-forming assistant, 0.4g of flatting agent, 0.4g of defoaming agent, 280g of aqueous bromine carbon epoxy resin emulsion and 144g of water are added for stirring and uniform dispersion, and then 80g of ammonium polyphosphate, 48g of melamine and 32g of dipentaerythritol are added and fully mixed to obtain the component A.
(5) Adding 93.69g of triethylene tetramine into a four-mouth bottle with a condensing tube, a stirring device, a thermometer and a dropping funnel, raising the temperature to 55-60 ℃, slowly dropping 83.42g of butyl glycidyl ether into the bottle by using the dropping funnel, controlling the reaction temperature to be not higher than 60 ℃, finishing dropping within 1 hour, and continuing to react for 2 hours; weighing 62.89g of tetrabromobisphenol A epoxy resin and 57.75g of ethylene glycol ethyl ether, and stirring and dissolving to obtain a tetrabromobisphenol A epoxy resin solution; and dripping tetrabromobisphenol A epoxy resin solution, controlling the reaction temperature to be 65 ℃, finishing dripping within 1 hour, continuing to react for 3 hours, heating to 90 ℃, slowly dripping 19.25g of glacial acetic acid, and continuing to react for 2 hours after finishing dripping. 482.99g of water is added, and the mixture is stirred uniformly to obtain a component B. The solid content of the component B is about 30%, and the viscosity is 1500-4000 mPa.s.
(6) Before use, the component A and the component B are mixed and stirred uniformly according to the mass ratio of 2: 1, and the mixture is stood for 15-30 minutes to obtain the water-based epoxy fireproof coating which can be brushed, sprayed and rolled for construction.
The test results of the aqueous epoxy fire-retardant coating obtained in comparative example 1 are shown in table 11:
TABLE 11 test results of the aqueous epoxy fire-retardant coating obtained in comparative example 1
From the test results of the examples 1 to 4 and the comparative example 1, it can be seen that the waterborne epoxy fire-retardant coating provided by the invention has the excellent sealing properties of both the solvent-free epoxy fire-retardant coating and the high-solid content epoxy fire-retardant coating, brings excellent corrosion resistance, organic solvent resistance, exposure heat resistance, humidity and heat resistance, and freeze-thaw cycle resistance, and can be used in severe outdoor environments. The self-made emulsion is preferably selected as the fireproof coating, the structure of a film forming material is optimized and adjusted, and the fireproof efficiency is high. The product of the technology has low viscosity, and can use a universal spraying device. Water is selected as a diluent, so that the environment is protected and pollution is avoided during construction.
Claims (10)
1. The water-based epoxy fire-retardant coating is characterized by comprising the following components in parts by weight:
the water-based epoxy fireproof coating consists of a component A and a component B;
the component A comprises: water-based epoxy emulsion, vinyl-epoxy emulsion, carbon forming catalyst, carbon forming agent, foaming agent and flame retardant;
the components are calculated according to the parts by weight,
the solid content of the water-based epoxy emulsion is 30-70 percent;
the solid content of the vinyl-epoxy emulsion is 30-70 percent;
the component B comprises: a curing agent and a refractory fiber;
based on 100 parts by weight of the water-based epoxy emulsion,
20-200 parts by weight of a curing agent;
5-80 parts by weight of refractory fiber;
the weight ratio of the component A to the component B is (1-10): 1.
2. A fire retardant coating as defined in claim 1, wherein:
the component A is calculated according to the parts by weight,
3. a fire retardant coating as defined in claim 1, wherein:
the component B is calculated according to the parts by weight,
20-160 parts by weight of a curing agent;
2-60 parts of refractory fiber.
4. A fire retardant coating as defined in claim 1, wherein:
the weight ratio of the component A to the component B is (1-6): 1.
5. A fire retardant coating as defined in claim 1, wherein:
the component A of the fireproof coating also comprises toughening emulsion, cosolvent, film-forming assistant, assistant and deionized water;
the component B of the fireproof coating also comprises pigment and filler.
6. A fire retardant coating as defined in claim 1, wherein:
the waterborne epoxy emulsion is at least one of epoxy resin aqueous dispersion, polyester modified epoxy emulsion, polyether modified epoxy emulsion, aliphatic epoxy emulsion, alicyclic epoxy emulsion, polyfunctional epoxy emulsion, hyperbranched epoxy emulsion, modified epoxy emulsion A and modified epoxy emulsion B;
the modified epoxy emulsion A is prepared from an emulsifier, a cosolvent, deionized water and modified epoxy resin A;
the modified epoxy resin A is prepared from dihydric alcohol, dihydric phenol and polyhydric glycidyl ether;
the modified epoxy emulsion B is prepared from an emulsifier, a cosolvent, deionized water and modified epoxy resin B;
the modified epoxy resin B is prepared by using polyhydric phenol modified bifunctionality epoxy resin.
7. A fire retardant coating as defined in claim 1, wherein:
the vinyl-epoxy emulsion is prepared from epoxy resin, a vinyl monomer, an emulsifier, a catalyst A and deionized water.
8. A fire retardant coating as defined in claim 1, wherein:
the carbon forming catalyst is at least one of phosphate, sulfonate, 9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide and derivatives thereof; and/or the presence of a gas in the gas,
the carbon forming agent is at least one of starch, cellulose and derivatives, sucrose, sorbitol, xylitol, polysaccharide compounds, pentaerythritol and derivatives, hydroxyl-containing lactone compounds, chitosan and cyclodextrin; and/or the presence of a gas in the gas,
the foaming agent is at least one of melamine compounds and derivatives thereof and metal hydroxides; preferably at least one of melamine, melamine phosphate, aluminum hydroxide and magnesium hydroxide; and/or the presence of a gas in the gas,
the flame retardant is at least one of aluminum hydroxide, magnesium hydroxide, zinc borate, antimony trioxide, titanium dioxide, zinc oxide, molybdenum oxide, ammonium octamolybdate, polysilsesquioxane and derivatives thereof, chitin flame retardant, aluminum hypophosphite and derivatives thereof, tetraphenyl phosphine chloride, triphenylphosphine oxide, phenyl phosphorus dichloride, triphenyl phosphorus dichloride, diphenyl phosphorus oxide, diphenyl phosphorus chloride, 2-carboxyethyl phenyl phosphinic acid, hexaphenoxycyclotriphosphazene and phenyl dichlorophosphate; and/or the presence of a gas in the gas,
the curing agent is at least one of an emulsion curing agent and a non-emulsion curing agent, and preferably at least one of polyamide, polyether amine, cardanol modified amine, aliphatic amine, alicyclic amine, isocyanate modified amine and polyamine modified curing agent; the polyamine modified curing agent is prepared from diamine, micromolecular polyamine and bifunctional epoxy resin in the presence of an organic solvent A; and/or the presence of a gas in the gas,
the refractory fiber is at least one of aluminum silicate fiber, alumina fiber, carbon fiber, mullite fiber, quartz fiber and basalt fiber.
9. A method for preparing a fire retardant coating according to any one of claims 1 to 8, characterized in that the method comprises:
the component A and the component B are mixed according to the dosage of each component, and then the component A and the component B are mixed according to the dosage ratio to prepare the waterborne epoxy fireproof coating.
10. Use of a fire retardant coating according to any one of claims 1 to 8 in a harsh outdoor environment.
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