CN108276881B - Fireproof and explosion-proof coating - Google Patents
Fireproof and explosion-proof coating Download PDFInfo
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- CN108276881B CN108276881B CN201810056298.6A CN201810056298A CN108276881B CN 108276881 B CN108276881 B CN 108276881B CN 201810056298 A CN201810056298 A CN 201810056298A CN 108276881 B CN108276881 B CN 108276881B
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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
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/02—Polyureas
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/08—Processes
- C08G18/10—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
- C08G18/12—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step using two or more compounds having active hydrogen in the first polymerisation step
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/48—Polyethers
- C08G18/4804—Two or more polyethers of different physical or chemical nature
- C08G18/482—Mixtures of polyethers containing at least one polyether containing nitrogen
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/48—Polyethers
- C08G18/50—Polyethers having heteroatoms other than oxygen
- C08G18/5021—Polyethers having heteroatoms other than oxygen having nitrogen
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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
- 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
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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
- C08L2201/02—Flame or fire retardant/resistant
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Abstract
The invention relates to a fireproof and explosion-proof coating, which belongs to the technical field of building coatings and comprises the following components in parts by weight of 45-51: 10-15 parts of a component A and a component B, wherein the component A comprises 50-60 parts of polyurea prepolymer, 5-10 parts of polyurethane gel and 10-15 parts of flame retardant, and the component B comprises 20-30 parts of diamine chain extender, 3-8 parts of nano particles and 25-35 parts of solvent. The coating has good fire resistance and freeze-thaw resistance, so that the heat-insulating board coated with the coating not only keeps the light and heat-insulating characteristics of the heat-insulating board, but also has high compressive strength, good heat-insulating performance and excellent flame-retardant and anti-explosion performance.
Description
Technical Field
The invention relates to the technical field of building coatings, in particular to a fireproof and explosion-proof coating.
Background
The prefabricated building is a building formed by assembling prefabricated components on a construction site, and the prefabricated concrete components of the building mainly form an integral concrete structure with a reliable force transmission structure and meet the bearing requirement through post-pouring concrete, slurry anchors or overlapping modes of connecting parts. In urban construction, more and more fabricated buildings are built, the components of the fabricated structures are produced industrially, the quality of the components is easy to guarantee, the site construction is simple, convenient and quick, the construction waste is less, the building construction efficiency is greatly improved, and the advantages of the fabricated structures are gradually widely recognized in the process of urbanization. And the assembled integral building becomes the main direction of green development of buildings in China due to the obvious advantages of water saving, energy saving, material saving, land saving and environmental protection, and also becomes an important mode for realizing building industrialization in China.
The fabricated building is generally fabricated by adopting a foamed cement composite board. However, if the prefabricated building is applied to outdoor Anying zailai, the foamed cement composite board is inconvenient to carry due to the heavy weight of the foamed cement composite board, and the application of the prefabricated building in the outdoor is limited. If insulation boards are used, for example: polyurethane heated board, phenolic aldehyde heated board etc. when assembling outdoor housing, the structural strength of heated board can not reach the requirement again.
Disclosure of Invention
The invention aims to provide a fireproof and explosion-proof coating which has good fire resistance and freeze-thaw cycle resistance, so that the heat-insulating plate coated with the coating not only keeps the light and heat-insulating characteristics of the heat-insulating plate, but also has high compressive strength, good heat-insulating performance and excellent flame-retardant and explosion-proof performance.
The technical purpose of the invention is realized by the following technical scheme:
the fireproof and explosion-proof coating is characterized by comprising the following components in parts by weight of 45-51: 10-15 parts of a component A and a component B, wherein the component A comprises 50-60 parts of polyurea prepolymer, 5-10 parts of polyurethane gel and 10-15 parts of flame retardant, and the component B comprises 20-30 parts of diamine chain extender, 3-8 parts of nano particles and 25-35 parts of solvent.
More preferably, the flame retardant is prepared by the following method: dissolving a compound of a formula I and a compound of a formula II in ethanol in a nitrogen atmosphere, adding a hydrochloric acid aqueous solution with the mass percentage concentration of 3-4%, stirring for 10-12 hours, and purifying to obtain a flame retardant; the weight ratio of the compound of formula I to the compound of formula II is 1: 4 to 5 of the total amount of the organic compounds,
more preferably, the polyurea prepolymer is prepared by the following method: stirring isophorone diisocyanate and polypropylene glycol at 30-35 ℃ for 0.5-1 hour, adding amino-terminated polyether and isopropanol, and carrying out heat preservation reaction at 30-35 ℃ for 0.5-1 hour to obtain a polyurea prepolymer; wherein, based on 100 weight parts of isophorone diisocyanate, 30-40 weight parts of polypropylene glycol, 10-15 weight parts of amino-terminated polyether and 0.1-0.5 weight part of isopropanol are used.
More preferably, the molecular weight of the amino-terminated polyether is 2000-5000.
More preferably, the polyurethane gel is prepared by the following method: under the nitrogen atmosphere, dissolving N-isopropyl acrylamide in 40-60 wt% of N, N-dimethylformamide aqueous solution, adding a cross-linking agent and an initiator, and reacting at 65-70 ℃ for 10-15 hours to obtain polyurethane gel; based on 100 parts by weight of N-isopropylacrylamide, 40-50 parts by weight of an aqueous solution of N, N-dimethylformamide, 3-8 parts by weight of a crosslinking agent and 0.3-1 part by weight of an initiator are used.
More preferably, the crosslinker is N, N' -methylenebisacrylamide.
More preferably, the initiator is at least one of ammonium persulfate, sodium persulfate, and potassium persulfate.
More preferably, the solvent is one of acetone, butanone and cyclohexanone.
More preferably, the diamine chain extender is one of dimethylthiotoluenediamine, diethyltoluenediamine, 3' -dichloro-4, 4' -diaminodiphenylmethane, 3, 5-diamino-4-chlorobenzoic acid isobutyl ester, isophoronediamine, hexamethylenediamine and 4,4' -diaminodicyclohexylmethane.
More preferably, the nano particles are one or two of aminated carbon nano tubes and nano titanium dioxide.
In conclusion, the invention has the following beneficial effects:
firstly, the fireproof and explosion-proof coating provided by the invention has the advantages of good binding power, good flame-retardant and explosion-proof performance of the coating, high strength, good water resistance, difficult shedding, good weather resistance, capability of enduring the influence of high and low temperature circulation, no accelerated corrosion to steel and long service life.
Compared with the flame retardant in the prior art, the fireproof and explosion-proof coating provided by the invention has better fire resistance and freeze-thaw cycle resistance by adopting the flame retardant, and the insulation board has higher compressive strength and heat insulation performance and excellent flame resistance and explosion resistance.
Thirdly, the polyurea prepolymer, the polyurethane gel and the flame retardant in the fireproof and explosion-proof coating provided by the invention generate a synergistic effect, so that the fire resistance and the freeze-thaw resistance of the fireproof and explosion-proof coating provided by the invention are obviously improved; and the compressive strength, the heat insulation performance and the flame-retardant and anti-explosion performance of the insulation board are obviously enhanced.
Detailed Description
The present invention will be described in further detail with reference to examples. It should be understood that the preparation methods described in the examples are only for illustrating the present invention and are not to be construed as limiting the present invention, and that the simple modifications of the preparation methods of the present invention based on the concept of the present invention are within the scope of the present invention as claimed.
All starting materials and solvents used in the examples are commercially available. Wherein, the isophorone diisocyanate and the N-isopropyl acrylamide are provided by Tokyo chemical industry Co., Ltd, and the specifications are analytically pure; the polypropylene glycol is provided by the Haian petrochemical plant of Jiangsu province, and the specification is analytical purity; the amino-terminated polyether D2000, the amino-terminated polyether D3500 and the amino-terminated polyether D5000 are all provided by Yangzhou morning science and technology group, Inc., and the specifications are all industrial grade; the isopropanol is provided by chemical reagent Limited of Mimi Europe, Tianjin, and the specification is analytical purity; the N, N-dimethylformamide is provided by Shanghai Zhongxiang chemical reagent company, and the specification is chemical purity; the N, N '-methylene bisacrylamide, the ammonium persulfate, the sodium persulfate and the potassium persulfate are provided by Shanghai Ruizi chemical reagent company Limited, the specification of the N, N' -methylene bisacrylamide is chemical purity, and the specification of the ammonium persulfate, the sodium persulfate and the potassium persulfate are analytical purity; the triglycidyl isocyanurate is provided by New Material Ltd, Anhui Taida, and has analytical purity; aminopropyl triethoxysilane is provided by Nanjing to the former chemical company Limited, and the specification is analytical purity; (11bS) -N, N-diethyl-binaphtho [2,1-d:1',2' -f ] [1,3,2] dioxaphospha-4-amine is provided by Beijing Baicao scientific and technological development Limited and has the chemical purity; both vinyltriethoxysilane and toluene are provided by Chishiai (Shanghai) chemical industry development Limited, and the specifications are chemically pure.
Raw material preparation example 1
100g of isophorone diisocyanate and 30g of polypropylene glycol are stirred for 1 hour at 30 ℃, 15g of amine-terminated polyether D2000 and 0.1g of isopropanol are added, and the heat preservation reaction is carried out for 0.75 hour at 30 ℃, so as to obtain the polyurea prepolymer.
Raw material preparation example 2
100g of isophorone diisocyanate and 35g of polypropylene glycol are stirred for 0.5 hour at 35 ℃, 12g of amine-terminated polyether D3500 and 0.5g of isopropanol are added, and the reaction is carried out for 0.5 hour at 35 ℃ under the condition of heat preservation, so as to obtain the polyurea prepolymer.
Raw material preparation example 3
100g of isophorone diisocyanate and 40g of polypropylene glycol are stirred for 0.75 hour at 32 ℃, 10g of amine-terminated polyether D5000 and 0.3g of isopropanol are added, and the heat preservation reaction is carried out for 1 hour at 32 ℃, so as to obtain the polyurea prepolymer.
Raw material preparation example 4
In a nitrogen atmosphere, 100g of N-isopropylacrylamide was dissolved in 40g of a 40 wt% aqueous solution of N, N-dimethylformamide, and 5g of N, N' -methylenebisacrylamide and 0.6g of ammonium persulfate were added to the solution to react at 67 ℃ for 13 hours, thereby obtaining a polyurethane gel.
Raw material preparation example 5
In a nitrogen atmosphere, 100g of N-isopropylacrylamide was dissolved in 45g of a 50% by weight aqueous solution of N, N-dimethylformamide, and then 3g of N, N' -methylenebisacrylamide and 0.3g of ammonium persulfate were added to the solution to react at 65 ℃ for 15 hours, thereby obtaining a polyurethane gel.
Raw material preparation example 6
Under nitrogen atmosphere, 100g of N-isopropyl acrylamide is dissolved in 50g of 60 wt% aqueous solution of N, N-dimethylformamide, 8g of N, N' -methylene-bisacrylamide and 1g of ammonium persulfate are added, and reaction is carried out at 70 ℃ for 10 hours to obtain polyurethane gel.
Raw material preparation example 7
Preparation of a Compound of formula I: 29.7g of triglycidyl isocyanurate were dissolved in N, N-dimethylformamide and introduced into a three-neck flask equipped with a stirrer bar, reflux condenser, dropping funnel and nitrogen. When the three-neck flask is saturated with nitrogen under continuous stirring, the temperature of the system is raised to 50 ℃. 66.3g of aminopropyltriethoxysilane was added dropwise to the above reaction solution using a constant pressure dropping funnel, and the reaction was maintained at 50 ℃ for 12 hours. Removing the N, N-dimethylformamide to obtain the compound of formula I.
Preparation of the compound of formula II: 21.6g of (11bS) -N, N-diethyl-binaphtho [2,1-d:1',2' -f ] [1,3,2] dioxaphospha-4-amine, 17.78g of vinyltriethoxysilane and 40mL of toluene are introduced into a 250mL three-necked flask equipped with a constant-pressure dropping funnel. After the temperature of the oil bath is raised to 80 ℃, 0.3g of azobisisobutyronitrile dissolved in 20mL of toluene is slowly dripped into a three-necked bottle and reacts for 12 hours at constant temperature to obtain yellow transparent liquid. Toluene and redundant vinyltriethoxysilane are evaporated by a rotary evaporator, and the remainder is put into a vacuum oven for vacuum heat preservation for 8 hours at 100 ℃ to prepare a yellow viscous compound of the formula II.
Preparation of the flame retardant: after 1g of the compound of formula I and 4g of the compound of formula II were dissolved in 100mL of ethanol under a nitrogen atmosphere, 11mL of a 3% aqueous hydrochloric acid solution was added, and after stirring for 10 hours, the solvent was evaporated under reduced pressure using a rotary evaporator to obtain a white powder. And cleaning the obtained white powder with ethanol, filtering, purifying, and drying in a vacuum supply box to obtain the flame retardant.
Raw material preparation example 8
Preparation of a Compound of formula I: same as in preparation example 7.
Preparation of the compound of formula II: same as in preparation example 7.
Preparation of the flame retardant: after 1g of the compound of formula I and 4.5g of the compound of formula II were dissolved in 100mL of ethanol under a nitrogen atmosphere, 11mL of a 3.5% aqueous hydrochloric acid solution was added, and after stirring for 10 hours, the solvent was evaporated under reduced pressure using a rotary evaporator to obtain a white powder. And cleaning the obtained white powder with ethanol, filtering, purifying, and drying in a vacuum supply box to obtain the flame retardant.
Raw material preparation example 9
Preparation of a Compound of formula I: same as in preparation example 7.
Preparation of the compound of formula II: same as in preparation example 7.
Preparation of the flame retardant: after 1g of the compound of formula I and 5g of the compound of formula II were dissolved in 100mL of ethanol under a nitrogen atmosphere, 11mL of a 4% aqueous hydrochloric acid solution was added, and after stirring for 10 hours, the solvent was evaporated under reduced pressure using a rotary evaporator to obtain a white powder. And cleaning the obtained white powder with ethanol, filtering, purifying, and drying in a vacuum supply box to obtain the flame retardant.
Example 1
Mixing the components in a weight ratio of 48: 15, and uniformly mixing the component A and the component B to obtain the fireproof and explosion-proof coating. Wherein, the component A is a uniform mixture of 50Kg of the polyurea prepolymer of the raw material preparation example 1, 10Kg of the polyurethane gel of the raw material preparation example 4 and 13Kg of the flame retardant of the raw material preparation example 7; the component B is a uniform mixture of 30Kg of 3, 5-diamino-4-chlorobenzoic acid isobutyl ester, 5Kg of nano titanium dioxide and 25Kg of acetone.
Example 2
Mixing the following components in percentage by weight of 45: 10, and uniformly mixing the component A and the component B to obtain the fireproof and explosion-proof coating. Wherein, the component A is a uniform mixture of 22Kg of the polyurea prepolymer of the raw material preparation example 2, 7Kg of the polyurethane gel of the raw material preparation example 5 and 15Kg of the flame retardant of the raw material preparation example 8; the component B is a uniform mixture of 25Kg of isophorone diamine, 3Kg of nano titanium dioxide and 30Kg of cyclohexanone.
Example 3
Mixing the components in a weight ratio of 51: 12, and uniformly mixing the component A and the component B to obtain the fireproof and explosion-proof coating. Wherein, the component A is a uniform mixture of 60Kg of the polyurea prepolymer of the raw material preparation example 3, 5Kg of the polyurethane gel of the raw material preparation example 6 and 10Kg of the flame retardant of the raw material preparation example 9; component B was a homogeneous mixture of 20Kg of 4,4' -diaminodicyclohexylmethane, 8Kg of aminated carbon nanotubes, and 35Kg of methyl ethyl ketone.
Comparative example 1
Mixing the components in a weight ratio of 48: 15, and uniformly mixing the component A and the component B to obtain the fireproof and explosion-proof coating. Wherein, the component A is a uniform mixture of 50Kg of the polyurea prepolymer of the raw material preparation example 1, 10Kg of the polyurethane gel of the raw material preparation example 4 and 13Kg of the special environment-friendly flame retardant JY-HT109 for ABS; the component B is a uniform mixture of 30Kg of 3, 5-diamino-4-chlorobenzoic acid isobutyl ester, 5Kg of nano titanium dioxide and 25Kg of acetone. The special environment-friendly flame retardant JY-HT109 for ABS is provided by Beijing Jinyang Wanda scientific and technological Limited.
Comparative example 2
Mixing the components in a weight ratio of 48: 15, and uniformly mixing the component A and the component B to obtain the fireproof and explosion-proof coating. Wherein, the component A is a uniform mixture of 50Kg of the polyurea prepolymer of the raw material preparation example 1, 10Kg of the polyurethane gel of the raw material preparation example 4 and 13Kg of JT55-HT109 which is a special environment-friendly flame retardant for ABS; the component B is a uniform mixture of 30Kg of 3, 5-diamino-4-chlorobenzoic acid isobutyl ester, 5Kg of nano titanium dioxide and 25Kg of acetone. Wherein, the special environment-friendly flame retardant JT55-HT109 for ABS is provided by Beijing, China, West and high-tech limited company.
Comparative example 3
Mixing the components in a weight ratio of 48: 15, and uniformly mixing the component A and the component B to obtain the fireproof and explosion-proof coating. Wherein, the component A is a uniform mixture of 10Kg of the polyurethane gel of raw material preparation example 4 and 13Kg of the flame retardant of raw material preparation example 7; the component B is a uniform mixture of 30Kg of 3, 5-diamino-4-chlorobenzoic acid isobutyl ester, 5Kg of nano titanium dioxide and 25Kg of acetone.
Comparative example 4
Mixing the components in a weight ratio of 48: 15, and uniformly mixing the component A and the component B to obtain the fireproof and explosion-proof coating. Wherein, the component A is a uniform mixture of 50Kg of the polyurea prepolymer of the raw material preparation example 1 and 13Kg of the flame retardant of the raw material preparation example 7; the component B is a uniform mixture of 30Kg of 3, 5-diamino-4-chlorobenzoic acid isobutyl ester, 5Kg of nano titanium dioxide and 25Kg of acetone.
Comparative example 5
Mixing the components in a weight ratio of 48: 15, and uniformly mixing the component A and the component B to obtain the fireproof and explosion-proof coating. Wherein, the component A is a uniform mixture of 50Kg of the polyurea prepolymer of the raw material preparation example 1 and 10Kg of the polyurethane gel of the raw material preparation example 4; the component B is a uniform mixture of 30Kg of 3, 5-diamino-4-chlorobenzoic acid isobutyl ester, 5Kg of nano titanium dioxide and 25Kg of acetone.
The newly mixed fire and explosion resistant coatings of examples 1 to 3 and comparative examples 1 to 5 were electrostatically sprayed on a stainless steel test panel preheated to 60 ℃ respectively, and the coating film was baked at 120 ℃ for 60 minutes with the coating thickness controlled to 3 mm. After a stainless steel test plate is placed in a constant-temperature and constant-humidity environment with the temperature of 24 ℃ and the humidity of 70% for 24 hours, hydrocarbon fire resistance, water resistance and freeze-thaw resistance cycle of the fireproof and explosion-proof coating are determined according to GB14907-2002 standard, the cohesiveness of the fireproof and explosion-proof coating is determined according to ASTME736-2006 standard, the steel corrosion performance of the fireproof and explosion-proof coating is determined according to ASTME937-2011 standard, and the test results are shown in Table 1.
TABLE 1
| Detecting items | Hydrocarbon fire resistance | Water resistance | Freeze-thaw cycle resistance | Adhesion/adhesion (grade) | Corrosion to steel |
| Example 1 | 134min | ≥24h | ≥15h | 0 | Does not accelerate the corrosion of steel |
| Example 2 | 139min | ≥24h | ≥15h | 0 | Does not accelerate the corrosion of steel |
| Example 3 | 135min | ≥24h | ≥15h | 0 | Does not accelerate the corrosion of steel |
| Comparative example 1 | 85min | ≥24h | 14h | 0 | Does not accelerate the corrosion of steel |
| Comparative example 2 | 76min | ≥24h | 13h | 0 | Does not accelerate the corrosion of steel |
| Comparative example 3 | 119min | ≥24h | 14h | 1 | Does not accelerate the corrosion of steel |
As can be seen from Table 1, the fireproof and explosion-proof coating provided by the invention has the advantages of good fire resistance, good adhesion, high strength, capability of withstanding the influence of high and low temperature cycles, good water resistance of the coating, difficulty in falling off, good weather resistance of the coating, capability of withstanding air corrosion and environmental climate attack for a long time, capability of meeting the requirements in case of fire, no acceleration of corrosion to steel and long service life.
Compared with the special environment-friendly flame retardant JY-HT109 for ABS and the special environment-friendly flame retardant JT55-HT109 for ABS, the fire-proof and explosion-proof coating provided by the invention has better fire resistance and freeze-thaw cycle resistance by adopting the flame retardant provided by the invention.
The polyurea prepolymer, the polyurethane gel and the flame retardant provided by the invention have a synergistic effect, so that the fire resistance and the freeze-thaw resistance of the fireproof and explosion-proof coating provided by the invention are obviously improved.
Application examples 1 to 3
The newly mixed fire-proof and explosion-proof coatings of examples 1-3 were electrostatically sprayed onto the outer surfaces of three phenolic insulation boards, purchased from Beijing Heizui insulation materials Ltd, respectively, and the coatings were baked at 120 ℃ for 60 minutes with the thickness of the coatings controlled to 3 mm.
Application of comparative examples 1 to 5
The fire-proof and explosion-proof coating which is newly mixed in the comparative examples 1 to 5 is electrostatically sprayed on the outer surfaces of three phenolic insulation boards which are purchased from Beijing Heizui insulation materials Co., Ltd respectively, the coating film is baked for 60 minutes at the temperature of 120 ℃, and the thickness of the coating film is controlled to be 3 mm.
Blank control example
Phenolic insulation boards available from beijing jeep insulation materials ltd.
According to rigid polyurethane foam plastics for building heat insulation (GB/T21558-2008) and building material and product combustion performance grading (GB8624-2012), the phenolic insulation boards provided by application examples 1-3, application comparative examples 1-5 and blank control examples are tested for strength, heat conductivity and combustion performance, and the combustion samples are installed according to GB/T20284-2006. The test results are shown in Table 2.
TABLE 2
As can be seen from Table 2, compared with the special environment-friendly flame retardant JY-HT109 for ABS and the special environment-friendly flame retardant JT55-HT109 for ABS, the fireproof and explosion-proof coating obtained by the flame retardant provided by the invention can enhance the compressive strength, the heat insulation performance and the flame retardant performance of the phenolic insulation board.
The polyurea prepolymer, the polyurethane gel and the flame retardant in the fireproof and explosion-proof coating provided by the invention have a synergistic effect, so that the compressive strength, the heat-insulating property and the flame retardant property of the phenolic insulation board are obviously enhanced.
For the phenolic insulation boards provided by application examples 1-3, application comparative examples 1-5 and blank comparative example to carry out an anti-explosion test, the test method comprises the following steps: (1) digging a pit with the depth of 2m multiplied by 2m and the depth of 1.5m, filling sand, and placing the phenolic aldehyde insulation boards prepared in application examples 1-3 and application comparative examples 1-3 on the sand surface in the pit without restriction; (2) the method is characterized in that a group charging mode is adopted, TNT explosive blocks are directly placed in the center of the surface of a phenolic insulation board after being bundled, the long edges of explosives are placed along the diagonal line of the phenolic insulation board, the bundling mode and the setting of initiation points of the TNT explosives are the same, and the explosive blocks are initiated by using triggering detonators; (3) after explosion, the overall and local damage conditions (the shape, size and crack development conditions of the explosion pits and the like) of the phenolic insulation board are observed and recorded on site. The test results are shown in Table 3.
TABLE 3
As can be seen from Table 3, compared with the special environment-friendly flame retardant JY-HT109 for ABS and the special environment-friendly flame retardant JT55-HT109 for ABS, the fireproof and explosion-proof coating obtained by adopting the flame retardant provided by the invention can enable the phenolic insulation board to have better anti-explosion performance.
The polyurea prepolymer, the polyurethane gel and the flame retardant in the fireproof and explosion-proof coating provided by the invention have a synergistic effect, and the anti-explosion performance of the phenolic insulation board can be obviously enhanced.
Claims (7)
1. The fireproof and explosion-proof coating is characterized by comprising the following components in parts by weight of 45-51: 10-15 parts of a component A and a component B, wherein the component A comprises 50-60 parts of polyurea prepolymer, 5-10 parts of polyurethane gel and 10-15 parts of flame retardant, and the component B comprises 20-30 parts of diamine chain extender, 3-8 parts of nano particles and 25-35 parts of solvent;
the flame retardant is prepared by the following method: dissolving a compound of a formula I and a compound of a formula II in ethanol in a nitrogen atmosphere, adding a hydrochloric acid aqueous solution with the mass percentage concentration of 3-4%, stirring for 10-12 hours, and purifying to obtain a flame retardant; the weight ratio of the compound of formula I to the compound of formula II is 1: 4 to 5 of the total amount of the organic compounds,
the polyurethane gel is prepared by the following method: under the nitrogen atmosphere, dissolving N-isopropyl acrylamide in 40-60 wt% of N, N-dimethylformamide aqueous solution, adding a cross-linking agent and an initiator, and reacting at 65-70 ℃ for 10-15 hours to obtain polyurethane gel; wherein, based on 100 weight parts of N-isopropylacrylamide, 40 to 50 weight parts of aqueous solution of N, N-dimethylformamide, 3 to 8 weight parts of crosslinking agent and 0.3 to 1 weight part of initiator are used;
the polyurea prepolymer is prepared by the following method: stirring isophorone diisocyanate and polypropylene glycol at 30-35 ℃ for 0.5-1 hour, adding amino-terminated polyether and isopropanol, and carrying out heat preservation reaction at 30-35 ℃ for 0.5-1 hour to obtain a polyurea prepolymer; wherein, based on 100 weight parts of isophorone diisocyanate, 30-40 weight parts of polypropylene glycol, 10-15 weight parts of amino-terminated polyether and 0.1-0.5 weight part of isopropanol are used.
2. The fireproof and explosion-proof coating as claimed in claim 1, wherein the molecular weight of the amino-terminated polyether is 2000-5000.
3. The fireproof and explosion-proof coating of claim 1, wherein the cross-linking agent is N, N' -methylenebisacrylamide.
4. The fireproof and explosion-proof coating of claim 1, wherein the initiator is at least one of ammonium persulfate, sodium persulfate, and potassium persulfate.
5. The fireproof and explosion-proof coating of claim 1, wherein the solvent is one of acetone, butanone and cyclohexanone.
6. The fireproof and explosion-proof coating of claim 1, wherein the diamine chain extender is one of dimethylthiotoluenediamine, diethyltoluenediamine, 3' -dichloro-4, 4' -diaminodiphenylmethane, 3, 5-diamino-4-chlorobenzoic acid isobutyl ester, isophoronediamine, hexamethylenediamine, and 4,4' -diaminodicyclohexylmethane.
7. The fireproof and explosion-proof coating of claim 1, wherein the nanoparticles are one or both of aminated carbon nanotubes and nano titanium dioxide.
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| CN101402713A (en) * | 2008-11-21 | 2009-04-08 | 北京化工大学 | Process for producing hydrogel with optical activity |
| CN102181221A (en) * | 2011-01-31 | 2011-09-14 | 北京东方雨虹防水技术股份有限公司 | Flame-retardant spraying polyurea elastic coating |
| CN106496570A (en) * | 2016-10-25 | 2017-03-15 | 太原理工大学 | A kind of hyperbranched poly phosphamide carbon forming agent of phosphorus-nitrogen containing and benzene ring structure and preparation method thereof |
| CN106700081A (en) * | 2017-01-22 | 2017-05-24 | 太原理工大学 | Polysiloxane fire retardant containing nitrogen, phosphorus and silicon, and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101402713A (en) * | 2008-11-21 | 2009-04-08 | 北京化工大学 | Process for producing hydrogel with optical activity |
| CN102181221A (en) * | 2011-01-31 | 2011-09-14 | 北京东方雨虹防水技术股份有限公司 | Flame-retardant spraying polyurea elastic coating |
| CN106496570A (en) * | 2016-10-25 | 2017-03-15 | 太原理工大学 | A kind of hyperbranched poly phosphamide carbon forming agent of phosphorus-nitrogen containing and benzene ring structure and preparation method thereof |
| CN106700081A (en) * | 2017-01-22 | 2017-05-24 | 太原理工大学 | Polysiloxane fire retardant containing nitrogen, phosphorus and silicon, and preparation method thereof |
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