CN111054613A - Novel fireproof coating - Google Patents
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- CN111054613A CN111054613A CN201911410275.1A CN201911410275A CN111054613A CN 111054613 A CN111054613 A CN 111054613A CN 201911410275 A CN201911410275 A CN 201911410275A CN 111054613 A CN111054613 A CN 111054613A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
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- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/50—Multilayers
- B05D7/56—Three layers or more
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- B05D7/584—No clear coat specified at least some layers being let to dry, at least partially, before applying the next layer
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- C09D131/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an acyloxy radical of a saturated carboxylic acid, of carbonic acid, or of a haloformic acid; Coating compositions based on derivatives of such polymers
- C09D131/02—Homopolymers or copolymers of esters of monocarboxylic acids
- C09D131/04—Homopolymers or copolymers of vinyl acetate
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- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/18—Fireproof paints including high temperature resistant paints
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- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/18—Fireproof paints including high temperature resistant paints
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B—PERFORMING OPERATIONS; TRANSPORTING
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Abstract
The invention belongs to the technical field of fireproof coatings, and particularly relates to a novel fireproof coating which is composed of a second filling layer, a non-expansion fireproof layer, a first filling layer and an expansion fireproof layer on a metal substrate from bottom to top; wherein the thickness of the non-expansion fireproof layer is 10-12mm, the thickness of the expansion fireproof layer is 3.2-5.0mm, and the thickness of the first filling layer is 1.2-2.0 mm; the thickness of the second filling layer is 2.0-2.5 mm; the novel fireproof coating prepared by the invention has excellent fireproof and heat-insulating properties, better bonding strength and better application prospect, and is suitable for further popularization and application.
Description
Technical Field
The invention belongs to the technical field of fireproof coatings, and particularly relates to a novel fireproof coating.
Background
Fire-retardant coatings, also known as flame retardant coatings, are applied to the surface of a substrate to be protected to reduce or prevent damage to the substrate due to the temperature of the fire. According to the principle of flame retardance, the coating can be divided into non-intumescent fire-retardant coating and intumescent coating.
The non-expansion type fire-proof paint is generally made of Portland portland cement and phosphate cement binder, and then inorganic minerals such as vermiculite, fiber, kaolin, perlite and the like are added to serve as heat insulation and skeleton functions in the paint.
The general expansion type fireproof paint is mainly prepared by base material, flame retardant system (IFR), inorganic filling aggregate and other addition auxiliary agents. The intumescent fire-retardant coating mainly comprises two fire-retardant coatings, namely a thin type fire-retardant coating and an ultrathin type fire-retardant coating. With the progress of society, in the 60 s of the 20 th century, the research on the fireproof coating in China begins to change, and the fireproof coating is developed from a thick type to a thin type and an ultrathin type. The coating expands under the action of flame or high temperature to form a foam carbon layer which is dozens of times larger than the original coating thickness, thereby effectively blocking the action of an external heat source on the base material.
At present, research on compounding of two types of intumescent and non-intumescent fire-retardant coatings has occurred in China. However, in the process of using the intumescent and non-intumescent fire-retardant coatings in a composite manner, because the expansion coefficients of the layers are greatly different, large gaps are often formed between the heat-insulating materials and the metal base materials and between the heat-insulating materials of the layers, so that a heat transfer channel is formed, and the fire-retardant and heat-insulating effects of the coating are greatly reduced.
Disclosure of Invention
In view of the above problems, the present invention provides a novel fire-retardant coating.
In order to achieve the purpose, the invention is realized by the following technical scheme:
the novel fireproof coating comprises a second filling layer, a non-expansion fireproof layer, a first filling layer and an expansion fireproof layer from bottom to top on a metal substrate;
wherein the thickness of the non-expansion fireproof layer is 10-12mm, the thickness of the expansion fireproof layer is 3.2-5.0mm, and the thickness of the first filling layer is 1.2-2.0 mm; the thickness of the second filling layer is 2.0-2.5 mm.
Further, the preparation method of the fireproof coating comprises the following steps:
s1: coating the second filling layer paint on the surface of the metal substrate in a blade mode, and then drying for 5-8 hours at the temperature of 45-50 ℃ to obtain a second filling layer;
s2: coating the non-expansion fireproof layer coating on the second filling layer in a roller coating mode, and curing to obtain a non-expansion fireproof layer;
s3: coating the first filling layer paint on the surface of a metal substrate by scraping, and then drying for 6-7h at 48-55 ℃ to obtain a first filling layer;
s4: coating the expanded fireproof layer coating on the surface of the first filling layer in a roller coating mode, and curing to obtain an expanded fireproof layer;
s5: and (3) placing the metal substrate coated with each coating in an environment with the temperature of 20-28 ℃ and the loudness and humidity of less than or equal to 85% for curing for 28 days to obtain the fireproof coating.
Further, the roll coating thickness of each pass of the non-expansion fire-retardant layer coating and the expansion fire-retardant layer coating in the S2 and S4 is not more than 8mm, and the interval period of each pass of roll coating is 24 hours.
Further, the non-expansion fireproof layer coating comprises 125 parts of Portland cement 105-; the preparation method comprises the following steps:
uniformly mixing portland cement, magnesium oxychloride, mineral wool, expanded vermiculite, aluminum silicate fiber, polyethylene glycol and a silicon-based waterproof agent, then mixing the component A, adding a dispersing agent and deionized water into the mixed component A, and uniformly mixing to obtain the non-expanded fireproof layer coating.
Further, the mass ratio of the deionized water to the mixed component A is 1: 0.8.
further, the expanded fireproof layer coating comprises 50-90 parts of vermiculite, 15-18 parts of melamine, 20-25 parts of perlite, 100-120 parts of polyvinyl acetate emulsion, 5-8 parts of hardener and 20-30 parts of deionized water; the preparation method comprises the following steps:
mixing vermiculite, melamine, perlite, vinyl acetate emulsion, hardener and deionized water uniformly, adding into a ball mill together, and ball-milling for 30-45min to obtain the expanded fireproof layer coating.
Further, the first filling layer coating is formed by mixing 10-15 parts of alumina fiber, 5-8 parts of expandable graphite and 30-50 parts of aluminum phosphate binder.
Further, the second filling layer coating is formed by mixing 16-20 parts of alumina fiber, 12-15 parts of expandable graphite and 45-60 parts of aluminum phosphate binder.
The prepared expanded fireproof layer paint, the non-expanded fireproof layer paint, the first filling layer paint and the second filling layer paint need to be used up within 120 min.
The novel fireproof coating provided by the invention is mainly suitable for the surfaces of steel plates and steel products.
Compared with the prior art, the invention has the following beneficial effects:
the novel fireproof coating provided by the invention has good fireproof and heat insulation effects, when fire occurs, the outermost expansion fireproof layer expands to prevent external heat from being transferred inwards, the non-expansion fireproof layer of the inner layer has low heat conductivity to further prevent heat from being transferred, the first filling layer and the second filling layer also have expansion characteristics, gaps formed among the layers due to difference of thermal expansion coefficients can be filled in a self-adaptive manner under a high-temperature condition, heat is prevented from being transferred from the gaps among the layers, and the fireproof and heat insulation effects of the coating are further improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural view of the present invention.
The corresponding part names for the various reference numbers in the figures are:
1-an expansion fire-proof layer; 2-a non-intumescent fire barrier layer; 3-a first filling layer; 4-a second filling layer; 5-metal substrate.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
a novel fireproof coating comprises a second filling layer, a non-expansion fireproof layer, a first filling layer and an expansion fireproof layer from bottom to top on a metal substrate;
wherein the thickness of the non-expansion fireproof layer is 10.5mm, the thickness of the expansion fireproof layer is 4.0mm, and the thickness of the first filling layer is 2.0 mm; the thickness of the second filling layer is 2.3 mm.
The preparation method of the fireproof coating comprises the following steps:
s1: coating a second filling layer paint on the surface of the metal substrate in a blade mode, and drying for 5 hours at the temperature of 45 ℃ to obtain a second filling layer;
s2: coating the non-expansion fireproof layer coating on the second filling layer in a roller coating mode, and curing to obtain a non-expansion fireproof layer;
s3: coating the first filling layer paint on the surface of the metal substrate by scraping, and then drying for 6h at 48 ℃ to prepare a first filling layer;
s4: coating the expanded fireproof layer coating on the surface of the first filling layer in a roller coating mode, and curing to obtain an expanded fireproof layer;
s5: and (3) placing the metal substrate coated with each coating in an environment with the temperature of 20-28 ℃ and the loudness and humidity of less than or equal to 85% for curing for 28 days to obtain the fireproof coating.
In the S2 and S4, the roller coating thickness of the non-expansion fireproof layer coating and the expansion fireproof layer coating in each pass is not more than 8mm, and the interval period of the roller coating in each pass is 24 hours.
The non-expansion fireproof layer coating comprises 105 parts of Portland cement, 8 parts of magnesium oxychloride, 28 parts of mineral wool, 11 parts of expanded vermiculite, 3 parts of aluminum silicate fiber, 15006 parts of polyethylene glycol, 8 parts of silicon-based waterproof agent and 18 parts of dispersing agent; the preparation method comprises the following steps:
uniformly mixing portland cement, magnesium oxychloride, mineral wool, expanded vermiculite, aluminum silicate fiber, polyethylene glycol and a silicon-based waterproofing agent, then mixing the component A, adding a dispersing agent and deionized water into the mixed component A, and uniformly mixing, wherein the mass ratio of the deionized water to the mixed component A is 1: 0.8, preparing the non-expansion fire-retardant layer coating.
The first filling layer coating is formed by mixing 10 parts of alumina fiber, 6 parts of expandable graphite and 35 parts of aluminum phosphate binder.
The second filling layer coating is formed by mixing 18 parts of alumina fibers, 13 parts of expandable graphite and 60 parts of aluminum phosphate binder.
Example 2:
a novel fireproof coating comprises a second filling layer, a non-expansion fireproof layer, a first filling layer and an expansion fireproof layer from bottom to top on a metal substrate;
wherein the thickness of the non-expansion fireproof layer is 11mm, the thickness of the expansion fireproof layer is 3.2mm, and the thickness of the first filling layer is 1.6 mm; the thickness of the second filling layer is 2.5 mm.
The preparation method of the fireproof coating comprises the following steps:
s1: coating a second filling layer paint on the surface of the metal substrate in a blade mode, and then drying for 8 hours at the temperature of 50 ℃ to obtain a second filling layer;
s2: coating the non-expansion fireproof layer coating on the second filling layer in a roller coating mode, and curing to obtain a non-expansion fireproof layer;
s3: coating the first filling layer paint on the surface of the metal substrate by scraping, and then drying for 7h at 49 ℃ to prepare a first filling layer;
s4: coating the expanded fireproof layer coating on the surface of the first filling layer in a roller coating mode, and curing to obtain an expanded fireproof layer;
s5: and (3) placing the metal substrate coated with each coating in an environment with the temperature of 20-28 ℃ and the loudness and humidity of less than or equal to 85% for curing for 28 days to obtain the fireproof coating.
In the S2 and S4, the roller coating thickness of the non-expansion fireproof layer coating and the expansion fireproof layer coating in each pass is not more than 8mm, and the interval period of the roller coating in each pass is 24 hours.
The non-expansion fireproof layer coating comprises 110 parts of Portland cement, 15 parts of magnesium oxychloride, 25 parts of mineral wool, 10 parts of expanded vermiculite, 1 part of aluminum silicate fiber, 15008 parts of polyethylene glycol, 5 parts of silicon-based waterproof agent and 15 parts of dispersing agent; the preparation method comprises the following steps:
uniformly mixing portland cement, magnesium oxychloride, mineral wool, expanded vermiculite, aluminum silicate fiber, polyethylene glycol and a silicon-based waterproofing agent, then mixing the component A, adding a dispersing agent and deionized water into the mixed component A, and uniformly mixing, wherein the mass ratio of the deionized water to the mixed component A is 1: 0.8, preparing the non-expansion fire-retardant layer coating.
The first filling layer coating is formed by mixing 12 parts of alumina fiber, 7 parts of expandable graphite and 30 parts of aluminum phosphate binder.
The second filling layer coating is formed by mixing 16 parts of alumina fibers, 12 parts of expandable graphite and 45 parts of aluminum phosphate binder.
Example 3:
a novel fireproof coating comprises a second filling layer, a non-expansion fireproof layer, a first filling layer and an expansion fireproof layer from bottom to top on a metal substrate;
wherein the thickness of the non-expansion fireproof layer is 11.5mm, the thickness of the expansion fireproof layer is 4.5mm, and the thickness of the first filling layer is 1.2 mm; the thickness of the second filling layer is 2.0 mm.
The preparation method of the fireproof coating comprises the following steps:
s1: coating a second filling layer paint on the surface of the metal substrate in a blade mode, and then drying for 7 hours at 48 ℃ to obtain a second filling layer;
s2: coating the non-expansion fireproof layer coating on the second filling layer in a roller coating mode, and curing to obtain a non-expansion fireproof layer;
s3: coating the first filling layer paint on the surface of a metal substrate by scraping, and then drying for 6 hours at 50 ℃ to prepare a first filling layer;
s4: coating the expanded fireproof layer coating on the surface of the first filling layer in a roller coating mode, and curing to obtain an expanded fireproof layer;
s5: and (3) placing the metal substrate coated with each coating in an environment with the temperature of 20-28 ℃ and the loudness and humidity of less than or equal to 85% for curing for 28 days to obtain the fireproof coating.
In the S2 and S4, the roller coating thickness of the non-expansion fireproof layer coating and the expansion fireproof layer coating in each pass is not more than 8mm, and the interval period of the roller coating in each pass is 24 hours.
The non-expansion fireproof layer coating comprises 120 parts of Portland cement, 12 parts of magnesium oxychloride, 27 parts of mineral wool, 15 parts of expanded vermiculite, 8 parts of aluminum silicate fiber, 15007 parts of polyethylene glycol, 7 parts of silicon-based waterproof agent and 20 parts of dispersing agent; the preparation method comprises the following steps:
uniformly mixing portland cement, magnesium oxychloride, mineral wool, expanded vermiculite, aluminum silicate fiber, polyethylene glycol and a silicon-based waterproofing agent, then mixing the component A, adding a dispersing agent and deionized water into the mixed component A, and uniformly mixing, wherein the mass ratio of the deionized water to the mixed component A is 1: 0.8, preparing the non-expansion fire-retardant layer coating.
The first filling layer coating is formed by mixing 13 parts of alumina fibers, 8 parts of expandable graphite and 40 parts of aluminum phosphate binder.
The second filling layer paint is formed by mixing 17 parts of alumina fiber, 14 parts of expandable graphite and 55 parts of aluminum phosphate binder.
Example 4:
a novel fireproof coating comprises a second filling layer, a non-expansion fireproof layer, a first filling layer and an expansion fireproof layer from bottom to top on a metal substrate;
wherein the thickness of the non-expansion fireproof layer is 10.0mm, the thickness of the expansion fireproof layer is 3.8mm, and the thickness of the first filling layer is 1.5 mm; the thickness of the second filling layer is 2.1 mm.
The preparation method of the fireproof coating comprises the following steps:
s1: coating a second filling layer paint on the surface of the metal substrate in a blade mode, and then drying for 6 hours at 47 ℃ to obtain a second filling layer;
s2: coating the non-expansion fireproof layer coating on the second filling layer in a roller coating mode, and curing to obtain a non-expansion fireproof layer;
s3: coating the first filling layer paint on the surface of the metal substrate by scraping, and then drying for 7h at 52 ℃ to prepare a first filling layer;
s4: coating the expanded fireproof layer coating on the surface of the first filling layer in a roller coating mode, and curing to obtain an expanded fireproof layer;
s5: and (3) placing the metal substrate coated with each coating in an environment with the temperature of 20-28 ℃ and the loudness and humidity of less than or equal to 85% for curing for 28 days to obtain the fireproof coating.
In the S2 and S4, the roller coating thickness of the non-expansion fireproof layer coating and the expansion fireproof layer coating in each pass is not more than 8mm, and the interval period of the roller coating in each pass is 24 hours.
The non-expansion fireproof layer coating comprises 115 parts of Portland cement, 10 parts of magnesium oxychloride, 30 parts of mineral wool, 14 parts of expanded vermiculite, 5 parts of aluminum silicate fiber, 15006 parts of polyethylene glycol, 10 parts of a silicon-based waterproof agent and 16 parts of a dispersing agent; the preparation method comprises the following steps:
uniformly mixing portland cement, magnesium oxychloride, mineral wool, expanded vermiculite, aluminum silicate fiber, polyethylene glycol and a silicon-based waterproofing agent, then mixing the component A, adding a dispersing agent and deionized water into the mixed component A, and uniformly mixing, wherein the mass ratio of the deionized water to the mixed component A is 1: 0.8, preparing the non-expansion fire-retardant layer coating.
The first filling layer coating is formed by mixing 14 parts of alumina fibers, 5 parts of expandable graphite and 45 parts of aluminum phosphate binder.
The second filling layer coating is formed by mixing 20 parts of alumina fiber, 15 parts of expandable graphite and 50 parts of aluminum phosphate binder.
Example 5:
a novel fireproof coating comprises a second filling layer, a non-expansion fireproof layer, a first filling layer and an expansion fireproof layer from bottom to top on a metal substrate;
wherein the thickness of the non-expansion fireproof layer is 12.0mm, the thickness of the expansion fireproof layer is 5.0mm, and the thickness of the first filling layer is 1.8 mm; the thickness of the second filling layer is 2.4 mm.
The preparation method of the fireproof coating comprises the following steps:
s1: coating a second filling layer paint on the surface of the metal substrate in a blade mode, and then drying for 7 hours at 46 ℃ to obtain a second filling layer;
s2: coating the non-expansion fireproof layer coating on the second filling layer in a roller coating mode, and curing to obtain a non-expansion fireproof layer;
s3: coating the first filling layer paint on the surface of a metal substrate by scraping, and then drying for 6h at 55 ℃ to prepare a first filling layer;
s4: coating the expanded fireproof layer coating on the surface of the first filling layer in a roller coating mode, and curing to obtain an expanded fireproof layer;
s5: and (3) placing the metal substrate coated with each coating in an environment with the temperature of 20-28 ℃ and the loudness and humidity of less than or equal to 85% for curing for 28 days to obtain the fireproof coating.
In the S2 and S4, the roller coating thickness of the non-expansion fireproof layer coating and the expansion fireproof layer coating in each pass is not more than 8mm, and the interval period of the roller coating in each pass is 24 hours.
The non-expansion fireproof layer coating comprises 125 parts of Portland cement, 13 parts of magnesium oxychloride, 29 parts of mineral wool, 12 parts of expanded vermiculite, 6 parts of aluminum silicate fiber, 15008 parts of polyethylene glycol, 6 parts of silicon-based waterproof agent and 19 parts of dispersing agent; the preparation method comprises the following steps:
uniformly mixing portland cement, magnesium oxychloride, mineral wool, expanded vermiculite, aluminum silicate fiber, polyethylene glycol and a silicon-based waterproofing agent, then mixing the component A, adding a dispersing agent and deionized water into the mixed component A, and uniformly mixing, wherein the mass ratio of the deionized water to the mixed component A is 1: 0.8, preparing the non-expansion fire-retardant layer coating.
The first filling layer coating is formed by mixing 15 parts of alumina fibers, 7 parts of expandable graphite and 50 parts of aluminum phosphate binder.
The second filling layer coating is formed by mixing 19 parts of alumina fibers, 14 parts of expandable graphite and 60 parts of aluminum phosphate binder.
Comparative example 1
The fireproof coating of the comparative example mainly comprises a non-expansion fireproof layer with the thickness of 14.4mm and an expansion fireproof layer with the thickness of 6.8mm, which are coated on a metal substrate, wherein the formula and the coating process of the non-expansion fireproof layer and the expansion fireproof layer are the same as those of example 5.
Comparative example 2
The fireproof coating of the comparative example mainly comprises a 12.0mm non-expansion fireproof layer and a 9.2mm expansion fireproof layer which are coated on a metal substrate, wherein the formula and the coating process of the non-expansion fireproof layer and the expansion fireproof layer are the same as those of example 5.
And (3) performance testing:
the fire-proof performance of the fire-proof coating is tested according to the national standard specified in GB14907-2002 Steel Structure fire-proof coating general technical Condition.
Bonding strength test the fireproof coating of the present example was tested according to the bonding strength test method of GB14907-2002 Steel Structure fireproof coating general technical Condition.
The test results are shown in the following table:
as can be seen from the table above, the novel fireproof coating prepared by the invention not only has excellent fireproof and heat-insulating properties, but also has better bonding strength.
In addition, as can be seen from comparing example 5 with comparative examples 1-2, the fireproof and heat-insulating properties of the fireproof coating are significantly improved after the first filling layer and the second filling layer are added to the fireproof coating.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (8)
1. The novel fireproof coating is characterized by comprising a second filling layer (4), a non-expansion fireproof layer (2), a first filling layer (3) and an expansion fireproof layer (1) on a metal substrate (5) from bottom to top;
wherein the thickness of the non-expansion fireproof layer (2) is 10-12mm, the thickness of the expansion fireproof layer (1) is 3.2-5.0mm, and the thickness of the first filling layer (3) is 1.2-2.0 mm; the thickness of the second filling layer (4) is 2.0-2.5 mm.
2. The novel fire retardant coating of claim 1, wherein the preparation method of the fire retardant coating comprises the following steps:
s1: coating the second filling layer paint on the surface of the metal substrate (5) by scraping, and then drying for 5-8h at 45-50 ℃ to obtain a second filling layer (4);
s2: coating the non-expansion fireproof layer coating on the second filling layer (4) in a roller coating mode, and curing to obtain a non-expansion fireproof layer (2);
s3: coating the first filling layer paint on the surface of a metal substrate (5) by scraping, and then drying for 6-7h at 48-55 ℃ to obtain a first filling layer (3);
s4: coating the expanded fireproof layer coating on the surface of the first filling layer (3) in a roller coating mode, and curing to obtain an expanded fireproof layer (1);
s5: and (3) placing the metal substrate (5) coated with each coating at the temperature of 20-28 ℃ and under the environment with the loudness and humidity less than or equal to 85% for curing for 28 days to obtain the fireproof coating.
3. The novel fireproof coating according to claim 2, wherein the roll coating thickness of the non-intumescent fire retardant coating and the intumescent fire retardant coating in S2 and S4 is not more than 8mm in each pass, and the interval period of each pass is 24 h.
4. The novel fireproof coating as claimed in claim 2, wherein the non-intumescent fire-retardant coating comprises 125 parts of Portland cement 105-; the preparation method comprises the following steps:
uniformly mixing portland cement, magnesium oxychloride, mineral wool, expanded vermiculite, aluminum silicate fiber, polyethylene glycol and a silicon-based waterproof agent, then mixing the component A, adding a dispersing agent and deionized water into the mixed component A, and uniformly mixing to obtain the non-expanded fireproof layer coating.
5. The novel fireproof coating according to claim 4, wherein the mass ratio of the deionized water to the mixed component A is 1: 0.8.
6. the novel fireproof coating as claimed in claim 1, wherein the expanded fireproof coating comprises 50-90 parts of vermiculite, 15-18 parts of melamine, 20-25 parts of perlite, 100-120 parts of polyvinyl acetate emulsion, 5-8 parts of hardener and 20-30 parts of deionized water; the preparation method comprises the following steps:
mixing vermiculite, melamine, perlite, vinyl acetate emulsion, hardener and deionized water uniformly, adding into a ball mill together, and ball-milling for 30-45min to obtain the expanded fireproof layer coating.
7. The novel fireproof coating according to claim 2, wherein the first filling layer paint is prepared by mixing 10-15 parts of alumina fiber, 5-8 parts of expandable graphite and 30-50 parts of aluminum phosphate binder.
8. The novel fireproof coating according to claim 2, wherein the second filling layer paint is prepared by mixing 16-20 parts of alumina fiber, 12-15 parts of expandable graphite and 45-60 parts of aluminum phosphate binder.
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| CN201911410275.1A CN111054613A (en) | 2019-12-31 | 2019-12-31 | Novel fireproof coating |
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| CN201911410275.1A CN111054613A (en) | 2019-12-31 | 2019-12-31 | Novel fireproof coating |
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| CN114958061A (en) * | 2022-05-05 | 2022-08-30 | 北京建筑材料检验研究院有限公司 | Multi-layer fireproof coating for high-rise building steel structure |
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