CN108559359B - Phase-change heat-absorbing and expansion flame-retardant steel structure fireproof coating and preparation method thereof - Google Patents
Phase-change heat-absorbing and expansion flame-retardant steel structure fireproof coating and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a phase-change heat-absorbing and expansion flame-retardant steel structure fireproof coating, which comprises a component A and a component B, wherein the component A comprises 80-100 parts by weight of base material and 13-31 parts by weight of fireproof flame retardant, the base material comprises PEG-melamine copolymer resin, the fireproof flame retardant comprises expanded perlite loaded with ammonium polyphosphate and expanded graphite loaded with chlorinated paraffin, the component B comprises epoxy resin, and the mass ratio of the component A to the component B is (0.8-1.25): 1. the invention also correspondingly provides a preparation method of the steel structure fireproof coating. The steel structure fireproof coating can inhibit the temperature from rising rapidly at medium and low temperature, and has high fireproof efficiency.
Description
Technical Field
The invention belongs to the technical field of fireproof materials, and particularly relates to a steel structure fireproof coating and a preparation method thereof.
Background
Steel structures are structures composed of steel materials and are one of the main building structure types. Because of lighter dead weight and simple and convenient construction, the steel plate is widely applied to the fields of large-scale factory buildings, venues, super high-rise buildings and the like. The steel is a building material which can not be burnt by itself, and has the characteristics of earthquake resistance, bending resistance and the like. In practical application, the steel member can relatively increase the load capacity of a building, meet the requirement of aesthetic appearance and shape of the building design, and avoid the defect that building materials such as concrete and the like cannot bend and stretch. Therefore, steel is favored by the construction industry, and steel is widely adopted as structural members in single-layer buildings, multi-layer buildings, skyscrapers, factory buildings, storehouses, waiting rooms, waiting halls and the like. ' Qiyi
However, steel as a building material has some inevitable defects in fire protection, and its mechanical properties, such as yield point, tensile strength and elastic modulus, are all sharply reduced by increasing temperature. The material of the steel structure is greatly changed when the temperature exceeds 250 ℃, so that the strength is gradually reduced, and blue brittleness and creep phenomena also occur. The steel structure usually loses the bearing capacity at the temperature of 450-650 ℃, and is greatly deformed, so that the steel column and the steel beam are bent, and the steel column and the steel beam cannot be used continuously due to excessive deformation. When the temperature of the steel structure reaches 600 ℃, the steel enters a plastic state and can not continuously bear, and the strength is almost zero. The general refractory limit of unprotected steel structures is around 15 minutes, which is also related to the rate at which the structure absorbs heat. Therefore, fire protection of steel structures is imperative.
The steel structure fireproof coating on the surface of the steel structure has fireproof and heat insulation effects, prevents the strength of steel from being reduced due to rapid temperature rise in a fire disaster, and avoids the collapse of a building due to the loss of the supporting capacity of the steel structure.
The ultrathin steel structure fireproof coating is a steel structure fireproof coating with the thickness of less than 3mm (including 3mm), good decorative effect, capability of expanding and foaming at high temperature and fire endurance generally within 2 h. The steel structure fireproof coating is generally a solvent type system and has the characteristics of excellent bonding strength, good weather and water resistance, good leveling property, good decoration and the like; when the fireproof heat insulation layer is on fire, the fireproof heat insulation layer slowly expands and foams to form a compact and hard fireproof heat insulation layer, the fireproof layer has strong fireproof impact, the temperature rise of steel is delayed, and steel members are effectively protected. The fire-proof and heat-insulating principle of the ultra-thin or thin steel structure fire-proof coating coated on a steel structure is that a fire-proof coating layer expands and foams when being on fire to form foam, and the foam layer not only isolates oxygen, but also has good heat-insulating property due to loose texture and can delay the transmission speed of heat transferred to a protected substrate. Because the fire-retardant coating is ultra-thin, the use amount of the thick and thin steel structure fire-retardant coating is greatly reduced, the total engineering cost is reduced, and the steel structure is effectively protected from fire.
Chinese patent 200710196405.7 discloses intumescent multi-component epoxy resin coating for fire protection and its use, comprising component a, curing agent component B and intumescent component C, component a comprising at least one epoxy resin and at least one vinyl ester, component B comprising at least one curing agent for epoxy resins, component C comprising at least one acid component, at least one carbon source and at least one gas generating agent, wherein components a and B are present separately from each other in a reaction-inhibiting manner and react upon mixing to polymerize. Chinese invention patent 201610091765.X discloses a water-based steel structure fireproof coating and a preparation method thereof, and the water-based steel structure fireproof coating is prepared from the following main raw materials in parts by weight: 15-23 parts of ammonium polyphosphate, 11-13 parts of melamine, 6-12 parts of pentaerythritol, 7-13 parts of waterborne epoxy resin, 11-15 parts of hydroxy acrylic emulsion, 6-10 parts of phenolic resin, 2-6 parts of montmorillonite, 19-25 parts of deionized water, 1.0-1.8 parts of thickening agent, 2-4 parts of dispersing agent and 0.14-0.22 part of defoaming agent. The invention of Chinese patent 201610091597.4 discloses a steel structure fireproof paint and a preparation method thereof, which is prepared from the following main raw materials in parts by weight: 19-23 parts of ammonium polyphosphate, 9-17 parts of melamine, 7-14 parts of pentaerythritol, 4-9 parts of silica sol, 8-11 parts of vinyl acetate-acrylic emulsion, 5-11 parts of high chlorinated polyethylene resin, 3-6 parts of glass fiber powder, 20-24 parts of deionized water, 1.2-2.2 parts of thickening agent, 2-4 parts of dispersing agent and 0.2-0.3 part of defoaming agent. Chinese invention patent 201610091589.X discloses a steel structure ultrathin expansion type fireproof coating and a preparation method thereof, which is prepared from the following main raw materials in parts by weight: 17-20 parts of ammonium polyphosphate, 10-15 parts of melamine, 6-10 parts of pentaerythritol, 6-12 parts of vinyl acetate-ethylene copolymer emulsion, 4-8 parts of thermoplastic acrylic resin, 5-10 parts of polyvinyl chloride resin, 3-7 parts of light calcium carbonate, 2.5-3.5 parts of methyl cellulose, 18-26 parts of deionized water, 1-2 parts of thickening agent, 3.5-5.0 parts of dispersing agent and 0.1-0.3 part of defoaming agent. Chinese patent 200810046370.3 discloses a fire-retardant coating for phosphorus-nitrogen ultrathin expansion type steel structure, which is composed of 40-75 parts of base resin composed of modified acrylic resin, polyurethane resin and alkyd resin, 50-70 parts of expansion flame retardant, 8-12 parts of titanium dioxide, 8-12 parts of calcium carbonate and 18-35 parts of mixed solvent composed of xylene and butyl acetate.
Although the above research works have achieved some promising results, the existing steel structure intumescent fire-retardant coating cannot inhibit the rapid temperature rise in the medium-low temperature range, and has low fire-retardant efficiency, so it is very necessary to develop a fire-retardant coating for a steel structure which can inhibit the rapid temperature rise in the medium-low temperature range and has high fire-retardant efficiency.
Disclosure of Invention
The technical problem to be solved by the invention is to overcome the defects and defects mentioned in the background technology, provide a fireproof coating which has high fireproof efficiency, absorbs heat through phase change at medium and low temperature, and expands into a foam carbon layer at high temperature to insulate heat and protect a steel structure, and correspondingly provide a preparation method of the coating. In order to solve the technical problems, the technical scheme provided by the invention is as follows:
the phase-change heat-absorption and expansion flame-retardant steel structure fireproof coating comprises a component A and a component B, wherein the component A comprises 80-100 parts by weight of base stock and 13-31 parts by weight of fireproof flame retardant, the base stock comprises PEG-melamine copolymer resin, the fireproof flame retardant comprises expanded perlite loaded with ammonium polyphosphate and expanded graphite loaded with chlorinated paraffin, the component B comprises epoxy resin, and the mass ratio of the component A to the component B is (0.8-1.25): 1.
in the phase-change heat-absorption and expansion flame-retardant steel structure fireproof coating, preferably, the fireproof flame retardant comprises the following components in parts by weight:
in the phase-change heat-absorption and expansion flame-retardant steel structure fireproof coating, preferably, the component A further comprises the following auxiliary additives in parts by weight:
in the auxiliary additive, the dustproof agent is polyoxyethylene ether oleate, the drier is zinc isooctanoate, the matting powder is TS100 matting powder produced by Degussa, the flatting agent is MONENG-1105 modified polydimethylsiloxane produced by Mooney chemical Co., Ltd, Dongguan, and the dispersing agent is 4010T dispersing agent produced by Songdaban auxiliary Co., Ltd, Fushan.
In the auxiliary additive, the nano tin dioxide can be used as a smoke suppressant, has the effects of converting and suppressing smoke and reducing smoke toxicity under the condition of fire, and simultaneously has small-size effect, quantum-size effect, surface effect and macroscopic quantum tunneling effect, and has good permeability to visible light.
In the phase-change heat-absorption and expansion flame-retardant steel structure fireproof coating, preferably, the epoxy resin is epoxy resin E44, the hydroxyl value of the epoxy resin is generally controlled to be 1.0mo L/kg, the epoxy value is 4.2mo L/kg, and the internal hydroxyl content of the fireproof coating is controlled to be 3.79mo L/kg to be the optimal choice.
As a general technical concept, the invention also provides a preparation method of the phase-change heat-absorption, expansion and flame-retardant steel structure fireproof coating, which comprises the following steps:
(1) preparing PEG-melamine copolymer resin, expanded perlite loaded with ammonium polyphosphate and expanded graphite loaded with chlorinated paraffin;
(2) mixing the PEG-melamine copolymer resin prepared in the step (1), expanded perlite loaded with ammonium polyphosphate, expanded graphite loaded with chlorinated paraffin, dipentaerythritol, melamine and auxiliary additives, and then grinding and sieving to obtain a component A;
(3) and (3) mixing the component A and the component B, adding a diluent to adjust the viscosity, and stirring to obtain the steel structure fireproof coating.
When the fireproof coating obtained by the preparation method is used, the fireproof coating is coated on the surface of a steel material in a spraying or brushing mode.
In the above preparation method, preferably, the preparation method of the PEG-melamine copolymer resin comprises the following steps: adding 20-30 parts of melamine and 40-60 parts of formaldehyde (mass fraction is 37%) into a reaction kettle, adjusting the pH value to 6.5-7.5, heating to 50-60 ℃ for reaction for 20min, adding 40-60 parts of polyethylene glycol PEG-600, adjusting the pH value to 4.5-5.0, performing reflux reaction for 1.0-2.0h, and then evaporating water to obtain the PEG-melamine copolymer resin.
In the above preparation method, preferably, the preparation method of the expanded perlite loaded with ammonium polyphosphate comprises the following steps: stirring and grinding 20-30 parts of expanded perlite, 12-15 parts of urea and 20-40 parts of phosphoric acid (the mass fraction is 85%), heating to 120-130 ℃ for prepolymerization for 20-30min under the protection of ammonia gas, then heating to 230-240 ℃ for polymerization and solidification for 130-160min, cooling the product to room temperature, adding 0.1-1.0 part of hydroxyl silicone oil, grinding for 1.0-3.0h, and sieving with a 400-mesh sieve to obtain the expanded perlite loaded with the ammonium polyphosphate.
In the above preparation method, preferably, the preparation method of the chlorinated paraffin-loaded expanded graphite comprises the following steps: heating 10-20 parts of expanded graphite to 70-90 ℃, simultaneously vacuumizing to 20-50kPa, preserving heat for 10-30min, then adding 80-90 parts of chlorinated paraffin cp42, reacting at 70-90 ℃ for 40-80min under normal pressure, cooling the product to room temperature, then adding 0.1-1.0 part of hydroxyl silicone oil, and grinding for 1.0-3.0h to obtain the expanded graphite loaded chlorinated paraffin.
In the preparation method, preferably, in the step (3), the diluent is acetone, and the stirring is shear stirring and mixing for 5-10min at a speed of 600-.
By utilizing the phase change characteristic of the phase change material, at the initial stage of fire, the phase change material PEG-melamine copolymer resin in the fireproof coating can absorb heat by utilizing phase change, the temperature rise is effectively controlled, the fire is killed in a bud state, and the phase change material in the coating emits heat after small fire is extinguished, so that the surface of the coating cannot be substantially damaged. At the later stage of fire, the fireproof coating expands at high temperature to form a good foam carbon layer, so that heat and oxygen can be effectively isolated. During the expansion process, there are three basic elements, namely an acid source, a carbon source, and a gas source. In the invention, ammonium polyphosphate can be used as an acid source, expanded perlite, expanded graphite, pentaerythritol and the like can be used as carbon sources, melamine and the like can be used as gas sources, and the acid source, the carbon source and the gas sources can form a carbon foam layer at high temperature, so that the effects of heat insulation, oxygen insulation, smoke suppression, drip prevention and the like are achieved, and the flame retardant property is excellent.
The principle of the invention is as follows: 1) the fireproof coating provided by the invention absorbs heat through phase change at the initial stage of a fire to inhibit the fire, and the coating expands into a foam carbon layer at high temperature at the later stage of the fire, so that the heat can be blocked to prevent the temperature of steel from rising rapidly. 2) According to the invention, the PEG-melamine copolymerized resin obtained by copolymerizing polyethylene glycol PEG-600 with a phase-change heat absorption function and melamine is used as a component of the coating, the PEG-melamine copolymerized resin has huge phase-change absorbed heat and remarkable cooling and fireproof effects, and in addition, the melamine can also be used as an air source when the coating expands. 3) The expanded perlite loaded with the ammonium polyphosphate and the expanded graphite loaded with the chlorinated paraffin are used as fireproof flame retardants, the two can be expanded into a foam carbon layer at high temperature to insulate heat, and meanwhile, the problem of compatibility of the expanded perlite, the expanded graphite and a resin base material can be well solved by respectively loading the ammonium polyphosphate and the chlorinated paraffin on the expanded perlite and the expanded graphite; the expanded perlite loaded with the ammonium polyphosphate and the expanded graphite loaded with the chlorinated paraffin can release the ammonium polyphosphate and the chlorinated paraffin at high temperature, and the ammonium polyphosphate and the chlorinated paraffin have flame retardant effects; in addition, the expanded perlite can also effectively adsorb smoke dust and toxic gas released by decomposition under the fire condition. 4) The PEG-melamine copolymer resin, the expanded perlite loaded with ammonium polyphosphate, the expanded graphite loaded with chlorinated paraffin, the high-temperature-resistant hydroxyl silicone oil, the amino silicone oil, the C1214 fatty alcohol phosphate and the MONENG-1105 modified polydimethylsiloxane selected by the invention can effectively improve the stability of the coating and the bonding strength, heat resistance, oxidation resistance and low temperature resistance of a paint film, and simultaneously have the effects of flame retardance and fire resistance. The phase-change heat-absorbing and intumescent flame-retardant steel structure fireproof coating can effectively guarantee the strength of steel, improve the fire-resistant time of a steel structure by more than 2 hours, win opportunity for fire rescue and escape, and reduce personnel and property loss in fire.
Compared with the prior art, the invention has the advantages that:
1. the fireproof coating disclosed by the invention absorbs heat through phase change at the initial stage of a fire to inhibit the fire, and the coating expands into a foam carbon layer at a high temperature at the later stage of the fire, so that the heat can be blocked to prevent the temperature of steel from rapidly rising, and the rescue time of the fire is prolonged.
2. The base material of the component A contains PEG-melamine copolymer resin, which has the function of phase change energy storage, can absorb a large amount of heat in the initial stage of fire so as to inhibit the fire, and in addition, the melamine can also be used as an air source when the coating expands.
3. The expanded perlite loaded with the ammonium polyphosphate and the expanded graphite loaded with the chlorinated paraffin are used as the fireproof flame retardant, the fireproof flame retardant has good compatibility with the base material of the coating, can be expanded into a foam carbon layer at high temperature to insulate heat, has obvious flame retardant effect, and can effectively adsorb smoke dust and toxic gas released by decomposition after the expanded perlite releases the ammonium polyphosphate.
Detailed Description
In order to facilitate an understanding of the present invention, the present invention will be described more fully and in detail with reference to the preferred embodiments, but the scope of the present invention is not limited to the specific embodiments described below.
Unless otherwise defined, all terms of art used hereinafter have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the present invention.
Unless otherwise specifically stated, various raw materials, reagents, instruments, equipment and the like used in the present invention are commercially available or can be prepared by existing methods.
Example 1:
a phase-change heat-absorbing and intumescent flame-retardant steel structure fireproof coating comprises a component A and a component B, wherein the component A is PEG-melamine copolymer resin, a fireproof flame retardant and an auxiliary additive, and the component B is epoxy resin E44; the fireproof flame retardant comprises expanded perlite loaded with ammonium polyphosphate, expanded graphite loaded with chlorinated paraffin, dipentaerythritol and melamine; the auxiliary additive is nano tin dioxide, titanium dioxide, aluminum powder, wollastonite, polyoxyethylene ether oleate, an organic silicon defoamer, hydroxyl silicone oil, amino silicone oil, zinc isooctanoate, extinction powder (the extinction powder with the model of TS100 produced by Degussa), MONENG-1105 modified polydimethylsiloxane (produced by Mooney chemical Co., Ltd. of Dongguan), C1214 fatty alcohol phosphate and a dispersing agent (the dispersing agent with the model of 4010T produced by Sundabo auxiliary agent Co., Ltd. of Fushan).
The preparation method of the steel structure fireproof coating comprises the following steps:
(1) preparing PEG-melamine copolymer resin, expanded perlite loaded with ammonium polyphosphate and expanded graphite loaded with chlorinated paraffin; wherein:
the preparation method of the PEG-melamine copolymer resin comprises the following steps: adding 13g of melamine and 24g of formaldehyde with the mass fraction of 37% into a reaction kettle, adjusting the pH value to 7.2 by using a sodium carbonate solution, heating to 55 ℃, reacting for 20min, adding 25g of polyethylene glycol (PEG-600), adjusting the pH value to 4.5-5.0 by using a hydrochloric acid solution, carrying out reflux reaction for 1.5h, and then evaporating water to obtain PEG-melamine copolymer resin;
stirring and grinding 15g of expanded perlite, 8g of urea and 85% phosphoric acid in mass fraction of 25m L uniformly, adding the mixture into a reactor, heating the mixture to 124 ℃ under the protection of ammonia gas for prepolymerization reaction for 25min, further heating the mixture to 235 ℃ for polymerization and solidification reaction for 140min, cooling the product to room temperature, adding 0.6g of high-temperature-resistant hydroxyl silicone oil, grinding the mixture in a planetary ball mill for 2.5h, and sieving the ground mixture with a 400-mesh sieve to obtain the expanded perlite loaded ammonium polyphosphate;
the preparation method of the chlorinated paraffin-loaded expanded graphite comprises the following steps: heating 15g of expanded graphite in a reactor to 80 ℃, simultaneously vacuumizing to 30kPa, preserving heat for 20min, then adding 85g of chlorinated paraffin cp42, restoring normal pressure, preserving heat at 85 ℃, reacting for 60min, cooling a product to room temperature, adding 0.6g of high-temperature-resistant hydroxyl silicone oil, and grinding for 2.0h in a planetary ball mill to obtain expanded graphite loaded chlorinated paraffin;
(2) uniformly mixing 40g of PEG-melamine copolymer resin, 3.2g of expanded perlite loaded with ammonium polyphosphate, 3.2g of expanded graphite loaded with chlorinated paraffin, 2.4g of dipentaerythritol, 0.8g of melamine, 8g of nano tin dioxide, 5g of titanium dioxide, 4g of wollastonite, 2.5g of aluminum powder, 1.2g of polyoxyethylene ether oleate, 0.16g of organic silicon defoamer, 0.8g of hydroxy silicone oil, 0.16g of amino silicone oil, 0.04g of zinc isooctoate, 1.6g of Desmodos TS100 flatting powder, 0.04g of modified polydimethylsiloxane, 0.12g of C1214 fatty alcohol phosphate and 0.4g of Tianbang 4010T, grinding for 6.0h in a planetary ball mill, and sieving with a 400-mesh sieve to obtain a component A;
(3) and mixing 50g of the component A and 50g of the component B, adding 15g of acetone to adjust the viscosity, and shearing, stirring and mixing for 6min at 1000r/min by using a high-speed shearing stirrer to obtain the steel structure fireproof coating.
Example 2:
the components of the phase-change heat-absorption and expansion flame-retardant steel structure fireproof coating in the embodiment are the same as those in the embodiment 1, except that the mixture ratio of the components is different, specifically referring to the usage amount of each raw material in the preparation method.
The preparation method of the steel structure fireproof coating comprises the following steps:
(1) the same procedure as in step (1) of the preparation process in example 1;
(2) the same procedure as in step (2) of the preparation process in example 1;
(3) and (3) mixing 45g of the component A and 55g of the component B, adding 15g of acetone to adjust the viscosity, and shearing, stirring and mixing for 6min at 1000r/min by using a high-speed shearing stirrer to obtain the steel structure fireproof coating.
Example 3:
the components of the phase-change heat-absorption and expansion flame-retardant steel structure fireproof coating in the embodiment are the same as those in the embodiment 1, except that the mixture ratio of the components is different, specifically referring to the usage amount of each raw material in the preparation method.
The preparation method of the steel structure fireproof coating comprises the following steps:
(1) the same procedure as in step (1) of the preparation process in example 1;
(2) the same procedure as in step (2) of the preparation process in example 1;
(3) and mixing 55g of the component A and 45g of the component B, adding 15g of acetone to adjust the viscosity, and shearing, stirring and mixing for 6min at 1000r/min by using a high-speed shearing stirrer to obtain the steel structure fireproof coating.
Comparative example 1:
the steel structure fireproof coating of the comparative example is a conventional ammonium polyphosphate, pentaerythritol and melamine flame-retardant epoxy resin coating, and the manufacturing method of the steel structure fireproof coating comprises the following steps: (1) and (3) mixing 650 g of low-molecular-weight polyamide and 50g of epoxy resin E44, adding 15g of acetone, 5g of ammonium polyphosphate, 6g of pentaerythritol and 2g of melamine, and shearing, stirring and mixing for 6min at 1000r/min by using a high-speed shearing stirrer to obtain the steel structure fireproof coating in the comparative example.
The steel structure fireproof coatings obtained in the above examples and comparative examples are measured on a thermogravimetric analyzer for residue mass at 700 ℃; measuring the expansion times by using the flame of an alcohol blast burner; measuring the peak value pHHR of the heat release rate and the smoke yield on a cone calorimeter; the fire-resistant time is determined according to GB14907-2002 Steel structure fireproof paint; determining the carbon layer adhesive force according to GB/T5210-2006 paint and varnish pull-off method adhesive force test; the tensile strength and elongation at break were determined by reference to GB/T1040-1992 test methods for tensile Properties of plastics. The specific test results are shown in table 1.
Table 1: performance parameters of Steel Structure fire-retardant coatings obtained in examples 1-3 and comparative example 1
As can be seen from table 1, the steel structure fire-retardant coatings obtained in examples 1, 2 and 3 have significantly improved performance indexes such as 700 ℃ residual weight ratio, expansion ratio, peak heat release rate, smoke output, fire-resistant time, adhesion, tensile strength, elongation at break, and the like, compared with the steel structure fire-retardant coating obtained in comparative example 1.
Claims (8)
1. The phase-change heat-absorption and expansion flame-retardant steel structure fireproof coating is characterized by comprising a component A and a component B, wherein the component A comprises 80-100 parts by weight of base material and 13-31 parts by weight of fireproof flame retardant, the base material comprises PEG-melamine copolymer resin, the fireproof flame retardant comprises expanded perlite loaded with ammonium polyphosphate and expanded graphite loaded with chlorinated paraffin, the component B comprises epoxy resin, and the mass ratio of the component A to the component B is (0.8-1.25): 1;
the preparation method of the PEG-melamine copolymer resin comprises the following steps: adding 20-30 parts of melamine and 40-60 parts of formaldehyde into a reaction kettle, adjusting the pH value to 6.5-7.5, heating to 50-60 ℃ for reaction for 20min, adding 40-60 parts of polyethylene glycol (PEG) -600, adjusting the pH value to 4.5-5.0, carrying out reflux reaction for 1.0-2.0h, and then evaporating water to obtain the PEG-melamine copolymer resin.
2. The steel structure fireproof coating of claim 1, wherein the fireproof flame retardant comprises the following components in parts by weight:
4-10 parts of expanded perlite loaded with ammonium polyphosphate;
4-10 parts of chlorinated paraffin-loaded expanded graphite;
4-8 parts of dipentaerythritol;
1-3 parts of melamine.
3. The fireproof coating for steel structures according to claim 2, wherein the component A further comprises the following auxiliary additives in parts by weight:
5-25 parts of nano tin dioxide;
10-20 parts of titanium dioxide;
8-10 parts of wollastonite;
5-8 parts of aluminum powder;
2-4 parts of a dust-proof agent;
0.1-1.0 part of organic silicon defoaming agent;
0.5-2.0 parts of hydroxyl silicone oil;
0.1-1.0 part of amino silicone oil;
0.05-0.1 part of drier;
0-5 parts of matting powder;
0.1-0.15 part of leveling agent;
0.2-0.4 part of C1214 fatty alcohol phosphate;
0.2 to 1.2 portions of dispersant.
4. The fire retardant coating material for steel structure according to claim 1, 2 or 3, wherein said epoxy resin is epoxy resin E44.
5. A method for preparing the fire retardant coating for the steel structure according to claim 3 or 4, which comprises the following steps:
(1) preparing PEG-melamine copolymer resin, expanded perlite loaded with ammonium polyphosphate and expanded graphite loaded with chlorinated paraffin;
(2) mixing the PEG-melamine copolymer resin prepared in the step (1), expanded perlite loaded with ammonium polyphosphate, expanded graphite loaded with chlorinated paraffin, dipentaerythritol, melamine and auxiliary additives, and then grinding and sieving to obtain a component A;
(3) and (3) mixing the component A and the component B, adding a diluent to adjust the viscosity, and stirring to obtain the steel structure fireproof coating.
6. The preparation method of claim 5, wherein the preparation method of the expanded perlite loaded with the ammonium polyphosphate comprises the following steps: stirring and grinding 20-30 parts of expanded perlite, 12-15 parts of urea and 20-40 parts of phosphoric acid uniformly, heating to the temperature of 120-130 ℃ for prepolymerization reaction for 20-30min under the protection of ammonia gas, then heating to the temperature of 230-240 ℃ for polymerization and solidification reaction for 130-160min, cooling the product to room temperature, adding 0.1-1.0 part of hydroxyl silicone oil, grinding for 1.0-3.0h, and then sieving with a 400-mesh sieve to obtain the expanded perlite loaded with the ammonium polyphosphate.
7. The method for preparing the chlorinated paraffin-loaded expanded graphite according to claim 5, comprising the steps of: heating 10-20 parts of expanded graphite to 70-90 ℃, simultaneously vacuumizing to 20-50kPa, preserving heat for 10-30min, then adding 80-90 parts of chlorinated paraffin cp42, reacting at 70-90 ℃ for 40-80min under normal pressure, cooling the product to room temperature, then adding 0.1-1.0 part of hydroxyl silicone oil, and grinding for 1.0-3.0h to obtain the expanded graphite loaded chlorinated paraffin.
8. The method according to any one of claims 5 to 7, wherein in the step (3), the diluent is acetone, and the stirring is shear stirring mixing with a high-speed shear stirrer at 600-10000r/min for 5-10 min.
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| CN116461190A (en) * | 2023-04-26 | 2023-07-21 | 江苏耀鸿电子有限公司 | High-corrosion-resistance epoxy resin copper-clad plate and preparation method thereof |
| CN117487432B (en) * | 2023-11-09 | 2024-05-03 | 江苏美标家居科技有限公司 | Fireproof heat-insulating coating and preparation process thereof |
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