CN116694190A - Intumescent water-based epoxy steel structure fireproof coating and preparation method thereof - Google Patents
Intumescent water-based epoxy steel structure fireproof coating and preparation method thereof Download PDFInfo
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- CN116694190A CN116694190A CN202310806321.XA CN202310806321A CN116694190A CN 116694190 A CN116694190 A CN 116694190A CN 202310806321 A CN202310806321 A CN 202310806321A CN 116694190 A CN116694190 A CN 116694190A
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- 238000000576 coating method Methods 0.000 title claims abstract description 56
- 239000011248 coating agent Substances 0.000 title claims abstract description 51
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 48
- 239000010959 steel Substances 0.000 title claims abstract description 48
- 239000004593 Epoxy Substances 0.000 title claims abstract description 31
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 20
- 238000002360 preparation method Methods 0.000 title claims description 4
- 239000000843 powder Substances 0.000 claims abstract description 58
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 28
- 239000003973 paint Substances 0.000 claims abstract description 24
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 18
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 18
- 239000010439 graphite Substances 0.000 claims abstract description 18
- 102000002322 Egg Proteins Human genes 0.000 claims abstract description 17
- 108010000912 Egg Proteins Proteins 0.000 claims abstract description 17
- 210000003278 egg shell Anatomy 0.000 claims abstract description 17
- 229910001404 rare earth metal oxide Inorganic materials 0.000 claims abstract description 17
- 239000004114 Ammonium polyphosphate Substances 0.000 claims abstract description 16
- 235000019826 ammonium polyphosphate Nutrition 0.000 claims abstract description 16
- 229920001276 ammonium polyphosphate Polymers 0.000 claims abstract description 16
- 239000003063 flame retardant Substances 0.000 claims abstract description 15
- 239000011324 bead Substances 0.000 claims abstract description 14
- 239000004408 titanium dioxide Substances 0.000 claims abstract description 14
- 239000000839 emulsion Substances 0.000 claims abstract description 11
- 238000003756 stirring Methods 0.000 claims description 25
- 239000007787 solid Substances 0.000 claims description 19
- MRELNEQAGSRDBK-UHFFFAOYSA-N lanthanum(3+);oxygen(2-) Chemical group [O-2].[O-2].[O-2].[La+3].[La+3] MRELNEQAGSRDBK-UHFFFAOYSA-N 0.000 claims description 10
- 238000005303 weighing Methods 0.000 claims description 10
- 229910052796 boron Inorganic materials 0.000 claims description 5
- 229910000420 cerium oxide Inorganic materials 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 5
- 239000011812 mixed powder Substances 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 5
- BMMGVYCKOGBVEV-UHFFFAOYSA-N oxo(oxoceriooxy)cerium Chemical compound [Ce]=O.O=[Ce]=O BMMGVYCKOGBVEV-UHFFFAOYSA-N 0.000 claims description 5
- 230000008569 process Effects 0.000 claims description 5
- RPNUMPOLZDHAAY-UHFFFAOYSA-N Diethylenetriamine Chemical compound NCCNCCN RPNUMPOLZDHAAY-UHFFFAOYSA-N 0.000 claims description 4
- 229920002873 Polyethylenimine Polymers 0.000 claims description 4
- 239000004952 Polyamide Substances 0.000 claims description 3
- 229920002647 polyamide Polymers 0.000 claims description 3
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 abstract description 9
- 239000000945 filler Substances 0.000 abstract description 7
- 238000002955 isolation Methods 0.000 abstract description 2
- 238000002485 combustion reaction Methods 0.000 description 7
- 229920000877 Melamine resin Polymers 0.000 description 6
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 description 5
- WXZMFSXDPGVJKK-UHFFFAOYSA-N pentaerythritol Chemical compound OCC(CO)(CO)CO WXZMFSXDPGVJKK-UHFFFAOYSA-N 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 238000010276 construction Methods 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- JYEUMXHLPRZUAT-UHFFFAOYSA-N 1,2,3-triazine Chemical compound C1=CN=NN=C1 JYEUMXHLPRZUAT-UHFFFAOYSA-N 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 238000002679 ablation Methods 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- -1 boron phenolic aldehyde Chemical class 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000007706 flame test Methods 0.000 description 2
- 239000005416 organic matter Substances 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- XFXPMWWXUTWYJX-UHFFFAOYSA-N Cyanide Chemical compound N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 150000003863 ammonium salts Chemical class 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000011362 coarse particle Substances 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000004088 foaming agent Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 125000001183 hydrocarbyl group Chemical group 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- 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
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
-
- 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
- C09D5/185—Intumescent 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
- C09D7/70—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
- C08K2003/221—Oxides; Hydroxides of metals of rare earth metal
-
- 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
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
-
- 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
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
-
- 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
- C08K3/32—Phosphorus-containing compounds
- C08K2003/321—Phosphates
- C08K2003/322—Ammonium phosphate
- C08K2003/323—Ammonium polyphosphate
-
- 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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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Paints Or Removers (AREA)
Abstract
The invention relates to an expansion type water-based epoxy steel structure fireproof coating, and belongs to the technical field of steel structure fireproof. The intumescent water-based epoxy steel structure fireproof paint is characterized by comprising the following components in percentage by weight: 35-50% of aqueous epoxy emulsion, 21-33% of ammonium polyphosphate, 7-15% of expandable graphite, 5-8% of titanium dioxide, 6-14% of floating beads, 6-14% of basalt flakes, 0.5-5% of eggshell powder, 1-3% of rare earth oxide and 1-10% of curing agent. The invention combines the filler and the flame-retardant system to protect the steel structure from two aspects of active fire extinguishment and passive flame isolation.
Description
Technical Field
The invention relates to an expansion type water-based epoxy steel structure fireproof coating, and belongs to the technical field of steel structure fireproof.
Background
Steel construction is one of the most widely used types of construction in infrastructure. However, the steel structure has low fire resistance, the temperature rises rapidly when a fire disaster occurs, and the critical temperature exceeding 500 ℃ can lose the bearing capacity, so that the building collapses, and serious personal injury and economic loss are caused. Fire retardant coatings are a common measure of fire protection for steel structures. When a fire occurs, the fireproof coating can prevent the rapid expansion of combustion or delay combustion, so that people can have enough time to perform fire suppression work.
Intumescent waterborne steel structure fireproof coatings are one of the most commonly used types of steel structure fireproof coatings. Compared with the non-expansion type steel structure fireproof paint, the expansion type steel structure fireproof paint has high strength, strong adhesive force and difficult hollowing and falling off; compared with solvent type fireproof paint, the water fireproof paint has the advantages of reducing the emission of volatile organic matter, reducing energy consumption, reducing the harm to human body and the pollution to environment in the links of production, construction, application and the like, and meeting the strict regulation standard of the emission of volatile organic matter worldwide.
The intumescent fire-retardant coating for the water-based steel structure consists of a water-based resin base material, an intumescent flame-retardant system, a filler and a pigment. The traditional intumescent flame retardant system consists of ammonium polyphosphate (acid source), pentaerythritol (carbon source) and melamine (gas source). Mainly uses acid generated by high-temperature decomposition of ammonium polyphosphate as a catalyst to carbonize pentaerythritol to form a carbonized layer. And meanwhile, the melamine can enable the carbonization layer to foam and expand, and slow down the transfer of heat and substances, so that the steel structure is protected. However, pentaerythritol is a flammable and explosive hazard, and toxic cyanide can be emitted from melamine at high temperature. Development of a novel expansion heat-resistant system and a flame-retardant heat-insulating filler, and improvement of the fire resistance, safety and environmental protection of expansion type water-based steel structure fireproof paint are current research hot spots. Chinese patent CN115368808A discloses a fire-retardant coating for water-based inorganic nano-expansion steel structure, which adds expandable graphite into the fire-retardant coating for expansion steel structure, and the distribution of expandable graphite in the expansion carbon layer is worm shape in high temperature state, so that the expansion carbon layer has a more compact structure, the strength of the expansion layer is increased, and the fire resistance of the steel structure is improved. However, the invention still uses pentaerythritol as a charring agent and melamine as a foaming agent, and the problems of safety and environmental protection of the traditional flame retardant system are not solved. Chinese patent CN112322167A discloses an intumescent water-based steel structure fireproof coating, which uses modified ammonium polyphosphate, triazine char former and expandable graphite to replace traditional ammonium polyphosphate, pentaerythritol and melamine as flame retardant components, and after other functional components are reasonably matched, the flame retardant effect of the traditional fireproof coating can be maintained, the water resistance and heat resistance efficiency are obviously improved, and the intumescent water-based steel structure fireproof coating can be used for protecting steel structures in more strict environments. However, triazine charring agents are high in price, high in requirements on filler types and low in applicability.
Disclosure of Invention
Aiming at the problems, the invention provides an intumescent water-based epoxy steel structure fireproof coating, which comprises the following components in percentage by weight: 35-50% of aqueous epoxy emulsion, 21-33% of ammonium polyphosphate, 7-15% of expandable graphite, 5-8% of titanium dioxide, 6-14% of floating beads, 6-14% of basalt flakes, 0.5-5% of eggshell powder, 1-3% of rare earth oxide and 1-10% of curing agent.
Specifically, the expandable graphite is flaky powder with 325-1000 meshes and the thickness is 10-20 microns; the titanium dioxide is spherical powder with 1000-2000 meshes; the floating beads are hollow spherical powder with 100-300 meshes; the basalt flakes are 325-1000 mesh flake powder; the eggshell powder is spherical powder with 300-500 meshes; the rare earth oxide is lanthanum oxide and cerium oxide with the mass ratio of 7:1, 500-1000 meshes of mixed spherical powder; the curing agent is one of diethylenetriamine, boron phenolic aldehyde, polyethyleneimine and polyamide.
The preparation method comprises the following steps: firstly, weighing ammonium polyphosphate, expandable graphite, titanium dioxide, floating beads, basalt flakes, eggshell powder and different solid powder of rare earth oxide according to a proportion, and stirring and mixing at 100-300 rpm for 10-20 min to obtain solid mixed powder; and secondly, weighing the aqueous epoxy emulsion according to the proportion, mechanically stirring at 200-500 rpm, and adding the mixed solid powder spoon by spoon in the stirring process. After all the solid powder is added, stirring at 1000-1200 rpm for 20-40 min to prepare the main component of the fireproof coating; thirdly, adding the curing agent into the main component of the fireproof paint according to the proportion, stirring for 5-10 minutes at 50-200 rpm to obtain the fireproof paint, and then coating the fireproof paint on the surface of the steel structure to form the fireproof coating.
The technical scheme has the advantages that: compared with the traditional single flame-retardant thought of ammonium polyphosphate-pentaerythritol-melamine, the invention combines the filler and the flame-retardant system to protect the steel structure from two aspects of active fire extinguishment and passive flame isolation, and has novel fireproof thought. According to the invention, the flame combustion process is actively slowed down by utilizing phosphoric acid and ammonia gas decomposed by ammonium polyphosphate at high temperature, and a passive heat insulation layer is formed by coating hollow floating beads and basalt flake heat insulation filler by utilizing a high-temperature expansion layer of expandable graphite. The eggshell powder can increase the affinity of the fireproof paint and the steel structure and improve the adhesive force. The rare earth oxide can improve the uniformity and the coating strength of the coating. The B-O bond energy of the boron phenolic curing agent is high, and the heat resistance and the flame retardance of the coating can be greatly improved after the boron phenolic curing agent reacts with epoxy in a crosslinking way. In summary, the invention obtains the expansion type water-based epoxy steel structure fireproof coating with high fire resistance, environmental protection and safety by optimizing the matching of the expansion layer and the heat insulation filler, strengthening the adhesive force of the coating and the steel matrix and improving the strength of the expansion layer.
Drawings
FIG. 1 is a graph showing the temperature rise of the backfire surface of a steel plate during flame testing of an intumescent waterborne epoxy fireproof coating.
FIG. 2 is a side view of the appearance change of the coating after flame combustion of the same type of product in the market;
FIG. 3 is a top view of the appearance change of the coating after flame combustion of the same type of product in the market;
FIG. 4 is a side view of the present invention showing the change in morphology of a coating after flame combustion;
FIG. 5 is a top view of the morphology change of the coating after flame combustion according to the present invention.
Detailed Description
The following examples are presented in conjunction with the accompanying drawings only to illustrate the technical aspects described in the claims, and are not intended to limit the scope of the claims.
Example 1
The intumescent water-based epoxy steel structure fireproof paint consists of the following components in percentage by weight: 35-50% of aqueous epoxy emulsion, 21-33% of ammonium polyphosphate, 7-15% of expandable graphite, 5-8% of titanium dioxide, 6-14% of floating beads, 6-14% of basalt flakes, 0.5-5% of eggshell powder, 1-3% of rare earth oxide and 1-10% of curing agent.
Wherein the expandable graphite is flake powder with 325-1000 meshes;
the titanium dioxide is spherical powder with 1000-2000 meshes;
the floating beads are hollow spherical powder with 100-300 meshes;
the basalt flakes are 325-1000 mesh flake powder;
the eggshell powder is spherical powder with 300-500 meshes;
the rare earth oxide is lanthanum oxide and cerium oxide with the mass ratio of 7:1, 500-1000 meshes of mixed spherical powder;
the curing agent is one of diethylenetriamine, boron phenolic aldehyde, polyethyleneimine and polyamide.
The above components are processed by the following steps:
firstly, weighing ammonium polyphosphate, expandable graphite, titanium dioxide, floating beads, basalt flakes, eggshell powder and different solid powder of rare earth oxide according to a proportion, and stirring and mixing at 100-300 rpm for 10-20 min to obtain solid mixed powder;
and secondly, weighing the aqueous epoxy emulsion according to the proportion, mechanically stirring at 200-500 rpm, and adding the mixed solid powder spoon by spoon in the stirring process. After all the solid powder is added, stirring at 1000-1200 rpm for 20-40 min to prepare the main component of the fireproof coating;
thirdly, adding the curing agent into the main component of the fireproof paint according to the proportion, stirring for 5-10 minutes at 50-200 rpm to obtain the fireproof paint, and then coating the fireproof paint on the surface of the steel structure to form the fireproof coating.
Example 2
The intumescent water-based epoxy steel structure fireproof paint consists of the following components in percentage by weight:
38% aqueous epoxy emulsion;
23% ammonium polyphosphate;
10% of expandable graphite which is flake powder with 325-450 meshes;
5% of titanium dioxide which is spherical powder with 1000 meshes to 1500 meshes;
8% of floating beads which are 100-150 mesh hollow spherical powder;
8% of basalt flakes, wherein the basalt flakes are 325-500 mesh flake powder;
3% of eggshell powder, wherein the eggshell powder is spherical powder with 300-500 meshes;
3% of rare earth oxide, wherein the rare earth oxide is lanthanum oxide and cerium oxide with the mass ratio of 7:1, 500-1000 meshes of mixed spherical powder;
2% of curing agent which is diethylenetriamine.
The above components are processed by the following steps:
firstly, weighing ammonium polyphosphate, expandable graphite, titanium dioxide, floating beads, basalt flakes, eggshell powder and different solid powder of rare earth oxide according to a proportion, and stirring and mixing at 150rpm for 15min to obtain solid mixed powder;
and secondly, weighing the aqueous epoxy emulsion according to the proportion, mechanically stirring at 400rpm, and adding the mixed solid powder spoon by spoon in the stirring process. After all the solid powder is added, stirring at 1000rpm for 30min to prepare a main component of the fireproof coating;
thirdly, adding the curing agent into the main component of the fireproof coating in proportion, stirring for 8 minutes at 100rpm to obtain the fireproof coating, and then coating the fireproof coating on the surface of the steel structure to form the fireproof coating.
Example 3
The intumescent water-based epoxy steel structure fireproof paint consists of the following components in percentage by weight:
35% aqueous epoxy emulsion;
28% ammonium polyphosphate;
9% of expandable graphite which is 600-1000 mesh flake powder;
7% of titanium dioxide which is spherical powder with 1500-2000 meshes;
6% of floating beads which are hollow spherical powder with 150-300 meshes;
7% of basalt flakes, wherein the basalt flakes are 500-1000 mesh flake powder;
1% of eggshell powder, wherein the eggshell powder is spherical powder with 300-500 meshes;
1% of rare earth oxide, wherein the rare earth oxide is lanthanum oxide and cerium oxide with the mass ratio of 7:1, 500-1000 meshes of mixed spherical powder;
6% of a curing agent which is polyethyleneimine.
The above components are processed by the following steps:
firstly, weighing ammonium polyphosphate, expandable graphite, titanium dioxide, floating beads, basalt flakes, eggshell powder and different solid powder of rare earth oxide according to a proportion, and stirring and mixing at 100-300 rpm for 10-20 min to obtain solid mixed powder;
and secondly, weighing the aqueous epoxy emulsion according to the proportion, mechanically stirring at 200-500 rpm, and adding the mixed solid powder spoon by spoon in the stirring process. After all the solid powder is added, stirring at 1000-1200 rpm for 20-40 min to prepare the main component of the fireproof coating;
thirdly, adding the curing agent into the main component of the fireproof paint according to the proportion, stirring for 5-10 minutes at 50-200 rpm to obtain the fireproof paint, and then coating the fireproof paint on the surface of the steel structure to form the fireproof coating.
As can be seen from FIG. 1, when the invention is adopted for steel plate fire prevention, the temperature of the back fire surface of the steel plate is moderately lower than the temperature rise of the back fire surface of similar products in the market, which indicates that the fire prevention effect of the invention is higher than that of similar products in the market; from fig. 2 and 3, it can be seen that the coating is not uniformly expanded by heating, coarse particles exist in the expanded layer, and the brittleness of the expanded layer is high. From fig. 4 and 5, it can be seen that the coating expands uniformly after being heated, and the particles of the expansion layer are fine and have good toughness.
Table 1 shows the comparison of the flame resistance of the invention with the flame test of similar products in the market, both coatings having a thickness of 2mm. It can be seen that although the expansion rate of the coating of the invention is lower than that of the like products in the market, the ablation rate and the temperature rise of the backfire surface are lower than those of the like products in the market, and the coating has excellent fire resistance.
TABLE 1 flame test Performance Table for waterborne epoxy fireproof coatings
| Expansion ratio | Ablation rate | The temperature of the backfire surface is raised for 30min | |
| Example 1 | 9.2 | 8％ | 209℃ |
| Example 2 | 11.3 | 9％ | 206℃ |
| Example 3 | 10.8 | 7％ | 203℃ |
| Similar products in market | 14 | 18％ | 228℃ |
Note that: referring to GB 14007-2018, fire retardant coating for Steel construction, wherein the flame is hydrocarbon fire.
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.
Claims (7)
1. The intumescent water-based epoxy steel structure fireproof paint is characterized by comprising the following components in percentage by weight: 35-50% of aqueous epoxy emulsion, 21-33% of ammonium polyphosphate, 7-15% of expandable graphite, 5-8% of titanium dioxide, 6-14% of floating beads, 6-14% of basalt flakes, 0.5-5% of eggshell powder, 1-3% of rare earth oxide and 1-10% of curing agent.
2. The intumescent waterborne epoxy steel structure fireproof coating of claim 1, wherein the expandable graphite is flaky powder with 325-1000 meshes and has a thickness of 10-20 microns.
3. The intumescent aqueous epoxy steel structure fire-retardant coating according to claim 1, characterized in that the titanium dioxide is spherical powder of 1000-2000 mesh.
4. The intumescent waterborne epoxy steel structure fireproof coating of claim 1, wherein the eggshell powder is spherical powder with 300-500 meshes.
5. The intumescent aqueous epoxy steel structure fireproof coating according to claim 1, wherein the rare earth oxide is lanthanum oxide and cerium oxide with the mass ratio of 7:1 to 500-1000 mesh.
6. The intumescent waterborne epoxy steel structure fireproof coating of claim 1, wherein the curing agent is one of diethylenetriamine, boron phenolic, polyethyleneimine and polyamide.
7. The preparation method of the intumescent water-based epoxy steel structure fireproof paint is characterized by comprising the following steps:
firstly, weighing ammonium polyphosphate, expandable graphite, titanium dioxide, floating beads, basalt flakes, eggshell powder and rare earth oxide according to a proportion, and stirring and mixing at 100-300 rpm for 10-20 min to obtain solid mixed powder;
and secondly, weighing the aqueous epoxy emulsion according to the proportion, mechanically stirring at 200-500 rpm, and adding the mixed solid powder spoon by spoon in the stirring process. After all the solid powder is added, stirring at 1000-1200 rpm for 20-40 min to prepare the main component of the fireproof coating;
thirdly, adding the curing agent into the main component of the fireproof paint according to the proportion, stirring for 5-10 minutes at 50-200 rpm to obtain the fireproof paint, and then coating the fireproof paint on the surface of the steel structure to form the fireproof coating.
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