CN108410352B - Water-based thin steel structure fireproof coating, fireproof mud and preparation method thereof - Google Patents
Water-based thin steel structure fireproof coating, fireproof mud and preparation method thereof Download PDFInfo
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- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
- C09D183/04—Polysiloxanes
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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
- C09D5/185—Intumescent 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
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- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
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- C—CHEMISTRY; METALLURGY
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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Abstract
The invention provides a water-based thin steel structure fireproof coating, fireproof mud and a preparation method thereof, and belongs to the field of fireproof materials. The fireproof coating comprises fireproof mud and fireproof liquid which are matched for use; the fire prevention mud includes: aggregate, biomass powder, graphite, a toughening agent, methyl cellulose ether, nano silicon dioxide, oxidized starch and dipentaerythritol; the fireproof liquid comprises: inorganic silicon flame retardant, waterproof agent, wetting agent, dispersing agent, defoaming agent and sodium methyl silicate. After the water-based thin steel structure fireproof coating is sprayed, when a coating layer on the surface of a steel structure material is burnt in fire at high temperature, the fireproof coating rapidly rises and has no large oxygen bubbles to form a multi-layer high-density hard film shell of multi-carbon co-generation copolymerization, which can effectively prevent flame from firing the steel structure material and form long-time heat insulation protection for the steel structure. Meanwhile, the fireproof coating obtained after coating has high adhesive force, high strength, scraping resistance and collision resistance.
Description
Technical Field
The invention relates to the field of fireproof materials, in particular to a water-based thin steel structure fireproof coating, fireproof mud and a preparation method thereof.
Background
The steel structure has the excellent characteristics of high and light weight, simple assembly, high construction speed, good earthquake resistance and the like, is more and more widely applied to public buildings and civil buildings, particularly shows great advantages on some super-high-rise or large-span public buildings, and the current assembly type steel structure building is also widely developed. The fire resistance of the steel structure is not negligible, and the steel structure is easy to collapse due to the fact that the mechanical strength of the steel structure is rapidly reduced when the temperature of the steel structure reaches 538 ℃. A large number of experiments have shown that, in the case of fire protection, the steel structure can only guarantee its load-bearing capacity within 15 to 20 minutes after a fire has occurred, so that fire protection must be carried out on the steel structure surface.
The common mode is that the surface of the steel structure is coated with fireproof paint, so that fireproof and heat-insulation effects are achieved, and the bearing capacity of the steel structure can be guaranteed within 30-180 min. At present, the non-intumescent and intumescent fire-retardant coatings are mainly used, and the intumescent fire-retardant coating is in a normal state when not heated and passively expands when heated, thereby playing a role in protecting a steel structure. In the early days, people mainly adopt solvent-based intumescent fire-retardant coatings, and with the importance of all countries in the world on environmental problems, water-based intumescent fire-retardant coatings are applied to more engineering examples.
However, the better products in the existing fireproof coatings have low fire resistance limit, unsatisfactory fireproof performance and small water-based cohesive force, cannot be pre-coated in factories, and can cause the falling of fireproof coatings in transportation if the pre-coating is carried out in engineering.
In view of the above, the invention provides a fireproof coating with high fire resistance limit and strong binding power.
Disclosure of Invention
The invention aims to provide a water-based thin steel structure fireproof coating and a preparation method thereof, and aims to solve the problems of low fire resistance limit and weak binding power of the fireproof coating in the prior art.
The second object of the present invention is to provide a water-based thin steel structure fire-retardant clay for preparing the water-based thin steel structure fire-retardant coating.
In order to achieve the above purpose of the present invention, the following technical solutions are adopted:
a water-based thin steel structure fireproof coating comprises fireproof mud and fireproof liquid which are used in a matching way;
the fireproof mud comprises the following components in parts by weight: 13-24 parts of aggregate, 4-7 parts of biomass powder, 2-4 parts of graphite, 2-4 parts of a toughening agent, 1-3 parts of methyl cellulose ether, 0.5-1.5 parts of nano silicon dioxide, 2-4 parts of oxidized starch and 4-6 parts of dipentaerythritol;
the fireproof liquid comprises the following components in parts by weight: 35-45 parts of inorganic silicon flame retardant, 14-17 parts of waterproof agent, 0.1-0.3 part of wetting agent, 0.4-0.6 part of dispersing agent, 0.1-0.3 part of defoaming agent and 3-5 parts of sodium methyl silicate.
A preparation method of the fireproof coating comprises the following steps:
mixing aggregate, biomass powder, graphite, a toughening agent, methyl cellulose ether, nano silicon dioxide, oxidized starch and dipentaerythritol according to parts by weight to obtain fireproof mud;
mixing an inorganic silicon flame retardant, a waterproof agent, a wetting agent, a dispersing agent, a defoaming agent and sodium methylsilicate in parts by weight to obtain a fireproof liquid;
mixing fireproof mud and fireproof liquid according to the mass ratio of 1:0.8 to 1.2.
The water-based thin steel structure fireproof mud comprises the following components in parts by weight: 13-24 parts of aggregate, 4-7 parts of biomass powder, 2-4 parts of graphite, 2-4 parts of a toughening agent, 0.5-1.5 parts of nano silicon dioxide, 1-3 parts of methyl cellulose ether, 2-4 parts of oxidized starch and 4-6 parts of dipentaerythritol.
Compared with the prior art, the beneficial effects of the invention comprise:
the water-based thin steel structure fireproof coating provided by the invention adopts a mode of combining a water-based inorganic material and an organic material, so that the binding power of the coating is improved. Inorganic expansion materials (such as inorganic silicon flame retardant) are used as main flame retardant materials, and a hard inorganic foaming layer can be formed by flame roasting, so that the breakdown or falling off of an organic carbon layer can be effectively avoided; the added green and environment-friendly nano silicon dioxide material expands at high temperature to form a dense mesh expansion body framework, so that the inorganic expansion layer can be effectively reinforced. Natural biomass powder and organic carbon forming substances (such as graphite, dipentaerythritol, oxidized starch and the like) are added in the carbon layer compounding, and a fine carbon layer cavity is formed in the inorganic tension spraying body, so that the temperature conduction can be effectively blocked.
When the steel structure material surface coating layer sprayed by the water-based thin steel structure fireproof coating is burnt at high temperature by fire, the fireproof coating rapidly rises and has no large oxygen bubbles to form a multi-layer multi-carbon co-generation copolymerized high-density hard film shell, so that the steel structure material can be effectively prevented from being burnt by flame, and long-time heat insulation protection can be formed on a steel structure. Meanwhile, the fireproof coating obtained after coating has high cohesive force, high strength, scraping resistance and collision resistance, and is suitable for being used as pre-coating of assembled steel components in steel factories.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to examples, but it will be understood by those skilled in the art that the following examples are only illustrative of the present invention and should not be construed as limiting the scope of the present invention. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
The embodiment provides a water-based thin steel structure fireproof coating, which comprises (A) fireproof mud and (B) fireproof liquid which are used in a matching way, namely before the coating is used, the fireproof mud and the fireproof liquid are mixed and stirred uniformly at room temperature.
Wherein, the fireproof mud (A) comprises the following components in parts by weight: 13-24 parts of aggregate, 4-7 parts of biomass powder, 2-4 parts of graphite, 2-4 parts of a toughening agent, 1-3 parts of methyl cellulose ether, 0.5-1.5 parts of nano silicon dioxide, 2-4 parts of oxidized starch and 4-6 parts of dipentaerythritol.
Or the fireproof mud comprises the following components in parts by weight: 17-19 parts of aggregate, 5-6 parts of biomass powder, 2.5-3.5 parts of graphite, 2.7-3.2 parts of toughening agent, 1.4-2.8 parts of methyl cellulose ether, 0.7-1.3 parts of nano silicon dioxide, 2.4-3.3 parts of oxidized starch and 4.7-5.4 parts of dipentaerythritol.
Or the fireproof mud comprises the following components in parts by weight: 18.5 parts of aggregate, 5.5 parts of biomass powder, 3 parts of graphite, 3 parts of a toughening agent, 2 parts of methyl cellulose ether, 1 part of nano silicon dioxide, 3 parts of oxidized starch and 5 parts of dipentaerythritol.
Further, the aggregate comprises the following components in parts by weight: 3-6 parts of diatomite, 4-7 parts of bentonite, 1-3 parts of cordierite powder, 3-5 parts of expanded perlite powder and 2-3 parts of cyanite powder.
Or the aggregate comprises the following components in parts by weight: 4-5 parts of diatomite, 4-5 parts of bentonite, 1.5-2.5 parts of cordierite powder, 3-4 parts of expanded perlite powder and 2.5-3 parts of cyanite powder.
Further, the toughening agent is high-molecular soluble rubber powder which comprises polyvinyl alcohol, polyoxyethylene and hydroxypropyl methyl cellulose.
Further, the biomass powder includes plant straw powder or wood powder.
(B) The fireproof liquid comprises the following components in parts by weight: 35-45 parts of inorganic silicon flame retardant, 14-17 parts of waterproof agent, 0.1-0.3 part of wetting agent, 0.4-0.6 part of dispersing agent, 0.1-0.3 part of defoaming agent and 3-5 parts of sodium methyl silicate.
Or the fireproof liquid comprises the following components in parts by weight: 38-42 parts of inorganic silicon flame retardant, 15-16 parts of waterproof agent, 0.15-0.25 part of wetting agent, 0.45-0.55 part of dispersing agent, 0.15-0.25 part of defoaming agent and 3-4 parts of sodium methyl silicate.
Or the fireproof liquid comprises the following components in parts by weight: 40 parts of inorganic silicon flame retardant, 15.6 parts of waterproof agent, 0.2 part of wetting agent, 0.5 part of dispersing agent, 0.2 part of defoaming agent and 3.5 parts of sodium methylsilicate.
Further, the water-proofing agent is organic silicon resin.
Further, the wetting agent is an anionic surfactant including at least one selected from the group consisting of alkyl sulfate, sulfonate, fatty acid or fatty acid ester sulfate, and phosphate.
Further, the dispersant includes at least one selected from the group consisting of sodium hexametaphosphate, sodium tripolyphosphate, sodium pyrophosphate, and water glass.
Further, the defoaming agent includes at least one selected from the group consisting of silicone emulsion, polyoxyethylene polyoxypropylene amine ether, polyoxypropylene glycerol ether and polyoxypropylene polyoxyethylene glycerol ether.
The embodiment further provides a preparation method of the fireproof coating, which comprises the following steps:
mixing aggregate, biomass powder, graphite, a toughening agent, methyl cellulose ether, nano silicon dioxide, oxidized starch and dipentaerythritol according to parts by weight to obtain fireproof mud;
mixing an inorganic silicon flame retardant, a waterproof agent, a wetting agent, a dispersing agent, a defoaming agent and sodium methylsilicate in parts by weight to obtain a fireproof liquid;
mixing fireproof mud and fireproof liquid according to the mass ratio of 1:0.8 to 1.2 (or 1: 0.9 to 1.1).
The coating process of the fireproof coating comprises the following steps:
a. derusting and decontaminating the steel member;
b. before use, the fireproof mud and the fireproof liquid are mixed according to the mass ratio of 1:0.8-1.2, and fully stirring again for use (preparing the fireproof coating according to the using amount within 4 hours, and gradually thickening the prepared fireproof coating within 4 hours).
c. Uniformly spraying the prepared fireproof coating on the surface of a steel structure, wherein the coating weight of each time is 1.1-1.5 kg/m2After the surface is dried and solidified for the first time, coating for the second time, wherein the coating needs to be coated for three times, and the thickness of the coating is 5-7 mm; if the primer becomes thick and is not easy to spray after being dried by natural heat, water can be properly added and the mixture is uniformly stirred for use.
d. And after the third brushing is finished for about 48 hours, spraying finish protective paint or coating, wherein the finish protective paint or coating adopts alkali-resistant coating.
The features and properties of the present invention are further described in detail below with reference to examples:
example 1
The embodiment provides a water-based thin steel structure fireproof coating, which comprises fireproof mud and fireproof liquid which are used in a matching way;
the fireproof mud comprises the following components in parts by weight: 13 parts of aggregate, 7 parts of plant straw powder, 4 parts of graphite, 2 parts of high-molecular soluble rubber powder, 3 parts of methyl cellulose ether, 0.5 part of nano silicon dioxide, 4 parts of oxidized starch and 4 parts of dipentaerythritol;
the fireproof liquid comprises the following components in parts by weight: 45 parts of inorganic silicon flame retardant, 14 parts of organic silicon resin, 0.1 part of anionic surfactant, 0.6 part of sodium tripolyphosphate, 0.3 part of silicone emulsion and 5 parts of sodium methylsilicate.
The preparation method comprises the following steps: respectively mixing the raw materials to obtain fireproof mud and fireproof liquid, and mixing the fireproof mud and the fireproof liquid at room temperature according to a mass ratio of 1:0.8, mixing and stirring uniformly.
Example 2
The embodiment provides a water-based thin steel structure fireproof coating, which comprises fireproof mud and fireproof liquid which are used in a matching way;
the fireproof mud comprises the following components in parts by weight: 24 parts of aggregate, 4 parts of plant straw powder, 2 parts of graphite, 4 parts of high-molecular soluble rubber powder, 1 part of methyl cellulose ether, 1.5 parts of nano silicon dioxide, 2 parts of oxidized starch and 6 parts of dipentaerythritol;
the fireproof liquid comprises the following components in parts by weight: 35 parts of inorganic silicon flame retardant, 17 parts of organic silicon resin, 0.3 part of anionic surfactant, 0.4 part of sodium pyrophosphate, 0.1 part of silicone emulsion and 3 parts of sodium methylsilicate.
The preparation method comprises the following steps: respectively mixing the raw materials to obtain fireproof mud and fireproof liquid, and mixing the fireproof mud and the fireproof liquid at room temperature according to a mass ratio of 1: 1.2 mixing and stirring evenly.
Example 3
The embodiment provides a water-based thin steel structure fireproof coating, which comprises fireproof mud and fireproof liquid which are used in a matching way;
the fireproof mud comprises the following components in parts by weight: 4.8 parts of diatomite, 5.3 parts of bentonite, 2 parts of cordierite powder, 3.7 parts of expanded perlite powder, 2.7 parts of kyanite powder, 5.5 parts of plant straw powder, 3 parts of graphite, 3 parts of high-molecular soluble rubber powder, 2 parts of methyl cellulose ether, 1 part of nano silicon dioxide, 3 parts of oxidized starch and 5 parts of dipentaerythritol.
The fireproof liquid comprises the following components in parts by weight: 40 parts of inorganic silicon flame retardant, 15.6 parts of organic silicon resin, 0.2 part of anionic surfactant, 0.5 part of sodium pyrophosphate, 0.2 part of silicone emulsion and 3.5 parts of sodium methylsilicate.
The preparation method comprises the following steps: respectively mixing the raw materials to obtain fireproof mud and fireproof liquid, and mixing the fireproof mud and the fireproof liquid at room temperature according to a mass ratio of 1: 1, mixing and stirring uniformly.
Example 4
The embodiment provides a water-based thin steel structure fireproof coating, which comprises fireproof mud and fireproof liquid which are used in a matching way;
the fireproof mud comprises the following components in parts by weight: 3 parts of diatomite, 4 parts of bentonite, 3 parts of cordierite powder, 3 parts of expanded perlite powder, 3 parts of kyanite powder, 6 parts of wood powder, 2.5 parts of graphite, 3.2 parts of high-molecular soluble rubber powder, 1.4 parts of methyl cellulose ether, 1.2 parts of nano silicon dioxide, 3.3 parts of oxidized starch and 5.4 parts of dipentaerythritol.
The fireproof liquid comprises the following components in parts by weight: 42 parts of inorganic silicon flame retardant, 15 parts of organic silicon resin, 0.25 part of anionic surfactant, 0.45 part of sodium hexametaphosphate, 0.25 part of polyoxypropylene glycerol ether and 3 parts of sodium methylsilicate.
The preparation method comprises the following steps: respectively mixing the raw materials to obtain fireproof mud and fireproof liquid, and mixing the fireproof mud and the fireproof liquid at room temperature according to a mass ratio of 1:0.8, mixing and stirring uniformly.
Example 5
The embodiment provides a water-based thin steel structure fireproof coating, which comprises fireproof mud and fireproof liquid which are used in a matching way;
the fireproof mud comprises the following components in parts by weight: 6 parts of diatomite, 7 parts of bentonite, 1 part of cordierite powder, 5 parts of expanded perlite powder, 2 parts of kyanite powder, 5 parts of wood powder, 3.5 parts of graphite, 2.7 parts of high-molecular soluble rubber powder, 2.8 parts of methyl cellulose ether, 0.9 part of nano silicon dioxide, 2.4 parts of oxidized starch and 4.7 parts of dipentaerythritol.
The fireproof liquid comprises the following components in parts by weight: 38 parts of inorganic silicon flame retardant, 15 parts of organic silicon resin, 0.15 part of anionic surfactant, 0.55 part of sodium hexametaphosphate, 0.15 part of polyoxypropylene glycerol ether and 4 parts of sodium methylsilicate.
The preparation method comprises the following steps: respectively mixing the raw materials to obtain fireproof mud and fireproof liquid, and mixing the fireproof mud and the fireproof liquid at room temperature according to a mass ratio of 1: 1, mixing and stirring uniformly.
Effect experiment example 1
And (3) testing the fireproof performance:
the fire retardant coating provided in example 3 was coated on a steel plate 300mm x 200mm x 5mm by 5mm (experimental group), and a plain steel plate was used as a blank experimental group. The fire endurance test method is referred to GB14907-2002.
The test results are shown below:
(1) common steel plate (blank test)
TABLE 1 fireproof Performance test results for white boards
| Time of day | Front flame temperature | Back temperature | Whether to cross fire or not |
| 1min | 950 | 356 | Whether or not |
| 2min | 950 | 540 | Whether or not |
(2) Example 3 fire retardant coating (Experimental group)
TABLE 2 fireproof performance test results of the fireproof coatings
| Time of day | Front flame temperature | Back temperature | Whether to cross fire or not |
| 1min | 950 | 25 | Whether or not |
| 3min | 950 | 65 | Whether or not |
| 5min | 950 | 76 | Whether or not |
| 10min | 950 | 115 | Whether or not |
| 15min | 950 | 135 | Whether or not |
| 20min | 950 | 165 | Whether or not |
| 30min | 950 | 210 | Whether or not |
| 40min | 950 | 256 | Whether or not |
| 50min | 950 | 263 | Whether or not |
| 60min | 950 | 280 | Whether or not |
| 70min | 950 | 285 | Whether or not |
| 80min | 950 | 290 | Whether or not |
| 90min | 950 | 288 | Whether or not |
| 100min | 950 | 287 | Whether or not |
| 110min | 950 | 289 | Whether or not |
| 120min | 950 | 285 | Whether or not |
In comparison, the steel plate coated with the fireproof coating provided by the embodiment 3 of the invention has a tolerance limit of up to 120min at the same front flame temperature, and the back temperature is far lower than that of a common steel plate, so that the fireproof coating has excellent fireproof performance.
Effect experiment example 2
The fire retardant coating provided by the embodiment 3 of the invention is detected by using the national standard 'general technical conditions for fire retardant coatings for steel structures' (GB14907-2002), and the results are shown in Table 3:
TABLE 3 fireproof paint Performance test results
As can be seen from table 4, all indexes of the fireproof coating provided by embodiment 3 of the present invention meet the national standards, and some indexes are far better than the national standards, for example, the fireproof coating has a fire endurance of 1.8, a bonding strength of 0.65, and the like.
In addition, the fire retardant coating provided in other embodiments is subjected to the above experiment, and the results are basically the same as those in embodiment 3, and thus are not repeated.
While particular embodiments of the present invention have been illustrated and described, it would be obvious that various other changes and modifications can be made without departing from the spirit and scope of the invention. It is therefore intended to cover in the appended claims all such changes and modifications that are within the scope of this invention.
Claims (5)
1. The water-based thin steel structure fireproof coating is characterized by being formed by mixing fireproof mud and fireproof liquid in a mass ratio of 1: 0.8-1.2; the fireproof mud is prepared from the following raw materials in parts by weight: 13-24 parts of aggregate, 4-7 parts of biomass powder, 2-4 parts of graphite, 2-4 parts of a toughening agent, 1-3 parts of methyl cellulose ether, 0.5-1.5 parts of nano silicon dioxide, 2-4 parts of oxidized starch and 4-6 parts of dipentaerythritol; the aggregate is prepared from the following raw materials in parts by weight: 3-6 parts of diatomite, 4-7 parts of bentonite, 1-3 parts of cordierite powder, 3-5 parts of expanded perlite powder and 2-3 parts of cyanite powder; the toughening agent is high-molecular soluble rubber powder which comprises polyvinyl alcohol, polyoxyethylene and hydroxypropyl methyl cellulose; the biomass powder is plant straw powder or wood powder;
the fireproof liquid is prepared from the following raw materials in parts by weight: 35-45 parts of inorganic silicon flame retardant, 14-17 parts of waterproof agent, 0.1-0.3 part of wetting agent, 0.4-0.6 part of dispersing agent, 0.1-0.3 part of defoaming agent and 3-5 parts of sodium methylsilicate; the wetting agent is an anionic surfactant.
2. The fire retardant coating for the water-based thin steel structure as claimed in claim 1, wherein the water-proofing agent is silicone resin.
3. The fire retardant coating material for an aqueous thin steel structure according to claim 1, wherein the anionic surfactant comprises at least one selected from the group consisting of alkyl sulfate, sulfonate, fatty acid or fatty acid ester sulfate, and phosphate.
4. The fire retardant coating material for water-based thin steel structure according to claim 1, wherein the dispersant comprises at least one selected from the group consisting of sodium hexametaphosphate, sodium tripolyphosphate, sodium pyrophosphate and water glass.
5. The fire retardant coating material for water-based thin steel structure of claim 1, wherein the defoaming agent comprises at least one selected from the group consisting of silicone emulsion, polyoxyethylene polyoxypropylene amine ether, polyoxypropylene glycerol ether and polyoxypropylene polyoxyethylene glycerol ether.
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| CN111363416B (en) * | 2020-05-21 | 2022-04-22 | 天津市宏越新材料有限公司 | Intumescent steel structure fireproof coating and preparation method and application thereof |
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