CN111363416B - Intumescent steel structure fireproof coating and preparation method and application thereof - Google Patents
Intumescent steel structure fireproof coating and preparation method and application thereof Download PDFInfo
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- CN111363416B CN111363416B CN202010434317.1A CN202010434317A CN111363416B CN 111363416 B CN111363416 B CN 111363416B CN 202010434317 A CN202010434317 A CN 202010434317A CN 111363416 B CN111363416 B CN 111363416B
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D103/00—Coating compositions based on starch, amylose or amylopectin or on their derivatives or degradation products
- C09D103/02—Starch; Degradation products thereof, e.g. dextrin
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/18—Fireproof paints including high temperature resistant paints
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/63—Additives non-macromolecular organic
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/28—Fire resistance, i.e. materials resistant to accidental fires or high temperatures
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/32—Phosphorus-containing compounds
- C08K2003/321—Phosphates
- C08K2003/327—Aluminium phosphate
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Abstract
The invention discloses an intumescent steel structure fireproof coating, which comprises fireproof mud and a fireproof curing agent, wherein the fireproof mud is prepared from the following raw materials in parts by weight: the fireproof coating comprises the following raw materials in parts by weight: the aluminum phosphate, phthalic anhydride, starch, sodium methyl silicate, dimethylbenzene, urea, a plasticizer, a dispersing agent and a defoaming agent are mainly used for a framework coating material for fire prevention of a steel structure. According to the invention, as the silicate fiber gel material is adopted, on one hand, the tolerance of the silicate fiber at high temperature is realized, and on the other hand, the drying time and the drying anti-cracking effect of the whole material are effectively improved through the porous structure of the silicate fiber gel material, so that the coating of the fireproof coating is rapid and stable, and the possibility of cracking and peeling is reduced.
Description
Technical Field
The invention belongs to the technical field of fireproof materials, and particularly relates to an intumescent steel structure fireproof coating as well as a preparation method and application thereof.
Background
The steel is a building material which can not be burnt, has the characteristics of earthquake resistance, bending resistance and the like, and can relatively increase the load capacity of a building and meet the requirement of aesthetic appearance and shape of the building design in practical application; the defects that building materials such as concrete and the like cannot be bent and stretched are also avoided, however, steel used as the building materials has some defects which are difficult to avoid in the aspect of fire prevention, the mechanical properties such as yield point, tensile strength, elastic modulus and the like of the steel are all rapidly reduced due to the rise of temperature, and in order to overcome the defects in the aspect of fire prevention in the practical application of the steel structure materials, fire prevention treatment is required to be carried out, and the surface of the steel is coated with the fire prevention materials.
The common fire prevention mode in the prior art is to carry out the coating fire prevention to the steel construction. At present, the intumescent fire-retardant coating mainly comprises a non-intumescent fire-retardant coating and an intumescent fire-retardant coating, wherein the intumescent fire-retardant coating is in a normal state when not heated and passively expands when heated, so that a steel structure is protected, but the existing intumescent fire-retardant coating gradually cracks after being heated, and the flame-retardant effect is gradually reduced; and the feeding and drying time is slow, and the coating time is long.
Disclosure of Invention
The invention aims to: in order to solve the technical problems in reality, an intumescent steel structure fireproof coating and a preparation method and application thereof are provided.
The technical scheme adopted by the invention is as follows: an expansion type steel structure fireproof coating comprises fireproof mud and a fireproof curing agent,
the fireproof mud is prepared from the following raw materials in parts by weight: 7-20 parts of Portland cement, 3-10 parts of melamine, 20-30 parts of dipentaerythritol, 9-15 parts of silicate fiber gel, 5-10 parts of urea, 12-25 parts of foaming agent, 2-4 parts of wetting agent and 10-15 parts of starch;
the fireproof curing agent is prepared from the following raw materials in parts by weight: 10-15 parts of aluminum phosphate, 5-7 parts of phthalic anhydride, 35-50 parts of starch, 3-5 parts of sodium methylsilicate, 25-35 parts of dimethylbenzene, 5-8 parts of urea, 0.1-0.3 part of plasticizer, 0.4-0.6 part of dispersant and 0.1-0.3 part of defoaming agent;
the silicate fiber gel is suspension formed by uniformly stirring silicate fiber powder and absolute ethyl alcohol at a high speed according to the weight ratio of 3: 1.
Wherein the aqueous dispersant is one or more of hydrolyzed polymaleic anhydride, polyethylene glycol and polyethylene wax.
Wherein the defoaming agent is one or more of polymerized propylene oxide, ethylene oxide, propylene oxide and glycerol.
The second aspect of the present invention further provides a preparation method of the fire retardant coating, comprising the following steps:
a) preparing materials: preparing raw materials according to the components;
b) preparing a suspension: mixing silicate fiber gel and dipentaerythritol to obtain silicate fiber gel suspension;
c) preparing powder: grinding, mixing and proportioning the silicate cement and the melamine to obtain a powder mixture;
d) preparing the fireproof mud: uniformly mixing urea, a foaming agent, a wetting agent, oxidized starch, the silicate fiber gel suspension in the step b and the powder mixture in the step c according to the weight formula proportion of the fire-proof mud to obtain the expanded steel structure fire-proof mud;
e) preparing a fireproof curing agent: uniformly mixing and stirring aluminum phosphate, phthalic anhydride, starch, sodium methyl silicate, dimethylbenzene, urea, a plasticizer, a dispersing agent and a defoaming agent according to the weight formula proportion of the fireproof coating to obtain a fireproof curing agent;
f) and stirring and mixing the expanded steel structure fireproof mud and the fireproof curing agent uniformly to obtain the final expanded steel structure fireproof coating.
And c, stirring and uniformly mixing the silicate fiber gel in the step b by using aluminum silicate fibers, absolute ethyl alcohol and deionized water at a ratio of 10:3:1 to obtain gel, and stirring and dispersing the prepared gel in alkali liquor to obtain spherical dispersed particles.
Wherein the weight ratio of the silicate fiber gel to the dipentaerythritol in the step b is 1: 2.
Wherein the weight ratio of the Portland cement to the melamine in the step c is 3: 1.
Wherein, the mixing processing mode in the step c is to uniformly stir and mix by using a horizontal mixer, the stirring speed is 80-100r/pm, and the stirring time is 30-40 min.
And f, wherein the weight ratio of the expanded steel structure fireproof mud to the fireproof curing agent in the step f is 1: 1.
The invention provides application of an intumescent fire-retardant coating for a steel structure, and the intumescent fire-retardant coating for the steel structure is used as a framework coating material for fire protection of the steel structure.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. in the invention, as the silicate fiber gel material is adopted, on one hand, the tolerance of the silicate fiber at high temperature is realized, and the silicate fiber gel forms a net-shaped porous structure after expansion, so that the silicate fiber gel has obvious isolation and fire resistance; on the other hand, the drying time and the drying anti-cracking effect of the whole material are effectively improved through the porous structure of the fireproof coating, so that the fireproof coating is fast and stable to coat, and the possibility of cracking and peeling is reduced;
2. according to the invention, as the fireproof mud and the fireproof curing agent are mixed to accelerate curing, the overall curing speed of the curing agent is improved, the curing stability is enhanced, and the drying time and the drying and anti-cracking effect are improved to a certain extent.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The embodiment I provides an intumescent fire retardant coating for a steel structure, which comprises fire retardant mud and a fire retardant coating, wherein the fire retardant mud is prepared from the following raw materials in parts by weight: 12 parts of Portland cement, 4 parts of melamine, 24 parts of dipentaerythritol, 12 parts of silicate fiber gel, 6 parts of urea, 15 parts of foaming agent, 3 parts of wetting agent and 12 parts of starch, wherein the fireproof coating is prepared from the following raw materials in parts by weight: 10 parts of aluminum phosphate, 5 parts of phthalic anhydride, 30 parts of starch, 4 parts of sodium methyl silicate, 30 parts of dimethylbenzene, 8 parts of urea, 0.25 part of plasticizer, 0.5 part of dispersant, 0.25 part of defoaming agent, wherein the dispersant is hydrolyzed polymaleic anhydride, the defoamer is formed by mixing polymerized propylene oxide, ethylene oxide, propylene oxide and glycerol, wherein the silicate fiber gel is suspension formed by stirring and uniformly mixing silicate fiber powder and absolute ethyl alcohol at a high speed according to the weight ratio of 3:1, wherein the wetting agent is at least one selected from the group consisting of alkyl sulfate, sulfonate, fatty acid or fatty acid ester sulfate and phosphate, wherein the plasticizer is at least one selected from the group consisting of phthalate, phosphate and aliphatic dibasic acid ester, wherein the foaming agent is at least one selected from the group consisting of calcium carbonate, magnesium carbonate and sodium bicarbonate.
The second embodiment is that the preparation method of the intumescent steel structure fireproof coating comprises the following steps:
a) preparing materials: preparing raw materials according to the components;
b) preparing a suspension: mixing porous spherical hollow granular silicate fiber gel and dipentaerythritol according to the weight ratio of 1:2 to prepare silicate fiber gel suspension, wherein the silicate fiber gel is prepared by uniformly stirring and mixing aluminum silicate fibers, absolute ethyl alcohol and deionized water at the ratio of 10:3:1 to obtain gel, and stirring and dispersing the prepared gel in alkali liquor to form spherical dispersed particles;
c) preparing powder: stirring silicate cement and melamine according to the weight ratio of 3:1 for 30min at the stirring speed of 100r/pm in a horizontal mixer, grinding and mixing to obtain a powder mixture;
d) preparing the fireproof mud: uniformly mixing urea, a foaming agent, a wetting agent, oxidized starch, the silicate fiber gel suspension in the step b and the powder mixture in the step c according to the weight ratio of 6:20:3:12:36:16 to obtain the expanded steel structure fireproof mud;
e) preparing a fireproof coating: aluminum phosphate, phthalic anhydride, starch, sodium methyl silicate, xylene, urea, a plasticizer, a dispersant and a defoaming agent are mixed according to a ratio of 40: 20:120:16: 120:32: 1: 2:1, mixing and stirring uniformly to obtain a primary expansion type steel structure fireproof coating;
f) and uniformly stirring and mixing the expanded steel structure fire-proof mud and the primary expanded steel structure fire-proof coating according to the weight ratio of 3:1 to obtain the final expanded steel structure fire-proof coating.
The third embodiment is that the intumescent steel structure fireproof coating comprises fireproof mud and fireproof coating, wherein the fireproof mud is composed of the following raw materials in parts by weight: 15 parts of Portland cement, 5 parts of melamine, 20 parts of dipentaerythritol, 10 parts of silicate fiber gel, 5 parts of urea, 13 parts of foaming agent, 3 parts of wetting agent and 10 parts of starch, wherein the fireproof coating is prepared from the following raw materials in parts by weight: 14 parts of aluminum phosphate, 6 parts of phthalic anhydride, 25 parts of starch, 4 parts of sodium methylsilicate, 34 parts of dimethylbenzene, 8 parts of urea, 0.2 part of plasticizer, 0.5 part of dispersant and 0.2 part of defoaming agent, wherein the water-based dispersant is polyethylene glycol, the defoaming agent is formed by mixing polymerized propylene oxide, ethylene oxide, propylene oxide and glycerol, and the intumescent steel structure fireproof coating is used for a framework coating material for preventing fire in a steel structure.
Test example in order to test the performance of the expanded steel structure fire-retardant mud (example two) obtained by the present invention, the measurement of each index is performed, the result is shown in table 1, and the comparative measurement of the temperature of the back of the steel plate with or without the coating at the high temperature of 950 ℃ is established, and the result is shown in table 2.
Table 1: the performance of the intumescent steel structure fireproof coating obtained by the invention is tested.
| Serial number | Test items | Technical index | Test results |
| 1 | State in the container | No caking, and is in uniform liquid state after being stirred | Conform to |
| 2 | Drying time/h | ≤12 | Surface drying: 0.8; and (3) actual drying: 8 |
| 3 | Fire resistance/h | GB14905-2002 | Conform to |
| 4 | Water resistance/h | GB/T1733-93 | Conform to |
| 5 | Impact resistance | GB/T1732-93 | Conform to |
Table 2: the fire resistance of the intumescent steel structure fire-retardant coating obtained by the invention is tested.
| Time/min | Steel plate with fireproof coating/° C | Steel plate without fireproof coating/° C |
| 0 | 0 | 0 |
| 30 | 276 | 850 |
| 60 | 315 | 950 |
| 90 | 357 | 950 |
| 120 | 386 | 950 |
| 150 | 624 | 950 |
| 180 | 950 | 950 |
As can be seen from table 1, each index of the intumescent steel structure fire retardant coating provided in embodiment 2 of the present invention meets the national standard, and some indexes are far better than the national standard, for example, the fire retardant coating has a shorter drying time, which is beneficial to shortening the waiting time of multiple coatings.
As can be seen from table 2, the intumescent steel structure fire retardant coating provided in embodiment 2 of the present invention has a significant fire protection and heat insulation effect as a whole, and the effective fire protection and heat insulation effect is maintained within 120 min.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (2)
1. An intumescent fire retardant coating for steel structures, which is characterized in that: comprises fire-proof mud and a fire-proof curing agent,
the fireproof mud is prepared from the following raw materials in parts by weight: 7-20 parts of Portland cement, 3-10 parts of melamine, 20-30 parts of dipentaerythritol, 9-15 parts of silicate fiber gel, 5-10 parts of urea, 12-25 parts of foaming agent, 2-4 parts of wetting agent and 10-15 parts of starch;
the fireproof curing agent is prepared from the following raw materials in parts by weight: 10-15 parts of aluminum phosphate, 5-7 parts of phthalic anhydride, 35-50 parts of starch, 3-5 parts of sodium methylsilicate, 25-35 parts of dimethylbenzene, 5-8 parts of urea, 0.1-0.3 part of plasticizer, 0.4-0.6 part of dispersant and 0.1-0.3 part of defoaming agent;
the silicate fiber gel is a suspension formed by uniformly stirring silicate fiber powder and absolute ethyl alcohol at a high speed according to the weight ratio of 3: 1;
the dispersant is one or more of hydrolyzed polymaleic anhydride, polyethylene glycol and polyethylene wax; the defoaming agent is one or more of polymerized propylene oxide, ethylene oxide, propylene oxide and glycerol;
the preparation method of the fireproof coating comprises the following steps:
a) preparing materials: preparing raw materials according to the components;
b) preparing a suspension: mixing silicate fiber gel and dipentaerythritol to obtain silicate fiber gel suspension;
c) preparing powder: grinding, mixing and proportioning the silicate cement and the melamine to obtain a powder mixture;
d) preparing the fireproof mud: uniformly mixing urea, a foaming agent, a wetting agent, starch, the silicate fiber gel suspension in the step b and the powder mixture in the step c according to the weight formula proportion of the fireproof mud to obtain the expanded steel structure fireproof mud;
e) preparing a fireproof curing agent: uniformly mixing and stirring aluminum phosphate, phthalic anhydride, starch, sodium methyl silicate, dimethylbenzene, urea, a plasticizer, a dispersing agent and a defoaming agent according to the weight formula proportion of the fireproof coating to obtain a fireproof curing agent;
f) stirring and mixing the expanded steel structure fireproof mud and the fireproof curing agent uniformly to obtain the final expanded steel structure fireproof coating;
in the step b, the silicate fiber gel is porous spherical hollow particles, the silicate fiber gel is prepared by uniformly stirring and mixing aluminum silicate fibers, absolute ethyl alcohol and deionized water at a ratio of 10:3:1 to form gel, and then the prepared gel is stirred and dispersed in alkali liquor to form spherical dispersed particles;
in the step b, the weight ratio of the silicate fiber gel to the dipentaerythritol is 1: 2;
the weight ratio of the Portland cement to the melamine in the step c is 3: 1;
the mixing processing mode in the step c is to uniformly stir and mix the mixture by a horizontal mixer, wherein the stirring speed is 80-100r/pm, and the stirring time is 30-40 min;
and f, the weight ratio of the expanded steel structure fireproof mud to the fireproof curing agent is 1: 1.
2. The use of an intumescent fire retardant coating for steel structures as claimed in claim 1, wherein: the intumescent fire-retardant coating for the steel structure is used for a framework coating material for fire prevention of the steel structure.
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| KR100272624B1 (en) * | 1998-05-15 | 2000-12-01 | 손연호 | Fireproofing and sound-absorbing composition |
| CN106751285A (en) * | 2016-12-15 | 2017-05-31 | 苏州科胜仓储物流设备有限公司 | A kind of water expansion fire-proof expanded material and preparation method thereof |
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| CN101096460A (en) * | 2006-06-30 | 2008-01-02 | 天津市振东涂料有限公司 | Preparation method of temperature-resistant and erosion-resistant coating for walling of flue |
| CN101173120A (en) * | 2006-11-03 | 2008-05-07 | 洛阳佛尔达消防产品有限公司 | Heat-insulation fire-proof paint special for LT type fire bund and method for producing the same |
| CN101781497A (en) * | 2009-12-19 | 2010-07-21 | 山西潞安环保能源开发股份有限公司 | Underground gas plugging coating in coal mine |
| CN105130365A (en) * | 2015-07-03 | 2015-12-09 | 周杰 | Method and apparatus for preparing silicate fiber enhanced silica aerogel under routine conditions |
| CN108410352A (en) * | 2018-03-29 | 2018-08-17 | 福建漳平众知防火科技有限公司 | A kind of waterborne thin fire retardant coating for steel structure, fire-proof mud and preparation method thereof |
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