CN110128928B - High-temperature-resistant environment-friendly steel structure fireproof coating and preparation method thereof - Google Patents
High-temperature-resistant environment-friendly steel structure fireproof coating and preparation method thereof Download PDFInfo
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- CN110128928B CN110128928B CN201910378510.5A CN201910378510A CN110128928B CN 110128928 B CN110128928 B CN 110128928B CN 201910378510 A CN201910378510 A CN 201910378510A CN 110128928 B CN110128928 B CN 110128928B
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
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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
- 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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- 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
- 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
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
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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
- C08K2201/00—Specific properties of additives
- C08K2201/014—Additives containing two or more different additives of the same subgroup in C08K
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
Abstract
The invention provides a novel high-temperature-resistant environment-friendly steel structure fireproof paint which is prepared from the following raw materials: 35-40 parts of silane modified waterborne polyurethane resin, 18-20 parts of kyanite micro powder, 18-20 parts of silicon nitride, 2-3 parts of titanium dioxide, 3-6 parts of sepiolite and 13-23 parts of water. The preparation method of the fireproof coating comprises the first step of putting polyol, polyisocyanate, a chain extender and a cross-linking agent into a reaction kettle for heating reaction, adding triethylamine, a coupling agent and a film-forming auxiliary agent, and dispersing at a high speed to prepare silane modified waterborne polyurethane resin; and secondly, adding the kyanite micro powder, the silicon nitride, the titanium dioxide, the sepiolite and the water according to the proportion, and stirring and mixing uniformly to obtain a finished product. The steel structure fireproof coating provided by the invention can effectively play a role in fire prevention and heat insulation, the expansion ratio is up to more than 10 times, and the fire resistance limit can reach 60-180 minutes. When a fire disaster happens, the fire-resistant heat-insulating protective layer can be quickly formed by expansion, and the fire resistance limit of the steel structure is improved.
Description
Technical Field
The invention relates to the technical field of novel fireproof coatings, in particular to a high-temperature-resistant environment-friendly steel structure fireproof coating, and also relates to a preparation method of the high-temperature-resistant environment-friendly steel structure fireproof coating.
Background
The steel structure is a form of high-rise building structure, and is widely applied to the building industry due to the characteristics of high strength, light weight, good extensibility, shock resistance, short construction period and the like, but the problem of fire prevention and heat insulation protection of the steel structure is neglected by people once because the steel structure is non-combustible. According to the reports of relevant data at home and abroad and the tests and statistics of relevant institutions, the fire resistance of the steel structure building is poorer than that of a masonry structure and a reinforced concrete structure. The mechanical strength of the steel is reduced along with the rise of the temperature, the strength is reduced to 40% -50% at about 500 ℃, the mechanical properties of the steel, such as yield point, compressive strength, elastic modulus, load capacity and the like, are rapidly reduced, and the support capacity is rapidly lost, so that the building is collapsed. Therefore, the steel structure is imperatively protected.
The fireproof coating has the function of isolating the surface of a protected object, delays the collapse time of a building structure and strives for precious time for rescue and fire extinguishment. The steel structure fireproof coating is brushed or sprayed on the surface of a steel structure, plays a role in fire prevention and heat insulation, prevents the strength of steel products from being reduced due to rapid temperature rise in a fire disaster, and avoids the collapse of a building caused by the loss of the supporting capability of the steel structure. The steel structure fireproof paint belongs to an important variety of fireproof materials, and accounts for 2/3 of the using amount of the whole fireproof materials. The research on the steel structure fireproof coating in China is popular in the eighties of the last century. Along with the establishment and perfection of fire-fighting laws and regulations in China, the research, production and use of the fire-fighting laws and regulations are more and more emphasized by the industry.
In the prior art, the emulsion paint is generally used for preparing the fireproof paint, and is prepared by adopting pure organic matters, so that the fireproof paint has poor ultraviolet resistance and poor weather resistance, and is easy to crack, fade and flower after being irradiated by ultraviolet rays. In addition, because the properties of the steel structure and the organic material are different, the conditions of expansion with heat and contraction with cold are different, so that the phenomena of cracking, falling off and the like of a coating surface or a paint surface are caused. Furthermore, various emulsion paints contain chemical substances such as ethylene glycol (antifreeze) and ammonia water (pH regulator), which generate Volatile Organic Compounds (VOC) and formaldehyde during construction, and poor environmental protection performance can bring adverse effects to physical and mental health of people. In addition, the fire-retardant coating should have good abrasion resistance to prevent the coating from cracking due to external force. Therefore, it is highly desirable to provide a steel structure fireproof coating which has strong fire resistance, good weather resistance, strong wear resistance, radiation resistance and environmental protection through the improvement of the formula.
Disclosure of Invention
Whether the steel structure fireproof coating can bear high-temperature combustion of external flame or not in the fireproof and heat-insulating properties depends on the basic properties of the fireproof filler in the coating, so that the excellent fireproof filler can be designed and introduced to improve the components of the high-temperature-resistant environment-friendly steel structure fireproof coating.
The invention aims to provide a high-temperature-resistant environment-friendly steel structure fireproof coating, which solves the defects in the prior art.
In order to achieve the purpose, the invention provides the following technical scheme:
the invention provides a high-temperature-resistant environment-friendly steel structure fireproof paint which is prepared from the following raw materials in parts by weight:
35-40 parts of silane modified waterborne polyurethane resin;
18-20 parts of kyanite micro powder;
18-20 parts of silicon nitride;
2-3 parts of titanium dioxide;
3-6 parts of sepiolite;
13-23 parts of water.
Further, the silane modified waterborne polyurethane resin is prepared from the following raw materials in parts by weight:
28-34 parts of polyol, polyisocyanate, a chain extender and a cross-linking agent, 4-5.5 parts of triethylamine, 0.4-1 part of a coupling agent and 1-2 parts of a film-forming assistant.
The invention also provides a preparation method of the high-temperature-resistant environment-friendly steel structure fireproof coating, which comprises the following steps:
firstly, putting polyol, polyisocyanate, a chain extender and a cross-linking agent into a reaction kettle in proportion for heating reaction, adding triethylamine, a coupling agent and a film-forming assistant, and dispersing at high speed to obtain silane modified waterborne polyurethane resin;
and secondly, adding the kyanite micro powder, the silicon nitride, the titanium dioxide, the sepiolite and the water according to the proportion, and stirring and mixing uniformly at a high speed to prepare the high-temperature-resistant environment-friendly steel structure fireproof coating.
In the steps, the temperature is controlled to be 60-70 ℃.
Compared with the prior art, the invention has the beneficial effects that:
the steel structure fireproof coating provided by the invention can effectively achieve the effects of fire prevention and heat insulation, and prevent the strength of steel from being reduced due to rapid temperature rise in a fire disaster. The coating thickness in actual engineering construction can be applied according to design requirements, the expansion ratio of the coating is up to more than 10 times, and the fire resistance limit can reach 60-180 minutes. The steel structure fireproof coating is coated on the surface of a steel structure building, and can be rapidly expanded to form a fireproof heat-insulation protective layer when a fire disaster occurs, so that the fireproof limit of a steel structure is improved. Meanwhile, the coating has a certain decorative effect and is widely applied. The preparation process of the fireproof coating is simple, the cost is low, the added natural kyanite particles are pollution-free, and the prepared coating is more environment-friendly.
The invention uses the kyanite particles and the silicon nitride powder to improve the performance of the steel structure fireproof coating, and the kyanite and the silicon nitride have outstanding advantages respectively, but are not applied to the fireproof coating.
The kyanite mineral has the advantages that: 1. thermal expansion property: volume expansion is carried out at high temperature, and when the temperature is reduced, the volume change is small, namely the volume expansion characteristic generated by irreversible conversion is realized; stability: the stability of the refractory material produced by the kyanite is 1.5 times higher than that of the clay refractory material; high refractoriness: the refractoriness of the common clay refractory material is 1670-1770 ℃. The kyanite refractory material is usually higher than 1790 ℃ and higher than 1825 ℃; also has better chemical corrosion resistance. And the kyanite is converted into mullite and fused free silica (cristobalite) by calcining at high temperature (1100-1650 ℃), while generating volume expansion to different degrees. The mullite thus produced has a high refractoriness (which is stable at 1800 ℃), is chemically inert and has good mechanical strength.
The silicon nitride is a high-temperature insoluble compound, has no melting point, strong high-temperature creep resistance, high thermal stability, good oxidation resistance and good chemical stability, can resist almost all inorganic acids and caustic soda solution with the concentration of less than 30 percent, and can resist corrosion of a plurality of organic acids.
Detailed Description
In order to make the present invention more clearly understood by those skilled in the art, the technical solution of the present patent will be described in further detail with reference to the specific embodiments.
Example 1
Preparation of a high-temperature-resistant environment-friendly steel structure fireproof coating:
(I) preparation of silane-modified aqueous polyurethane resin
(1) The ingredients were as shown in the following table:
| components | Dosage (Kg) |
| Polyhydric alcohols | 12.3 |
| Polyisocyanates | 19 |
| Chain extender | 1.4 |
| Crosslinking agent | 1.3 |
| Triethylamine | 4.2 |
| Coupling agent | 0.8 |
| Film forming aid | 1 |
| Total up to | 40 |
(2) Preparation process
Adding the polyol, the polyisocyanate, the chain extender and the cross-linking agent into a reaction kettle according to the ingredients, heating to 60 ℃ for reaction, adding the triethylamine and the coupling agent, adding the film-forming assistant in the reaction process, and adding a proper amount of dispersing assistant according to the needs, and dispersing at a high speed to obtain the silane modified waterborne polyurethane resin.
(II) preparing the high-temperature-resistant environment-friendly steel structure fireproof coating
(1) The components and the mixture ratio of the high-temperature-resistant environment-friendly steel structure fireproof paint are detailed in the following table:
| components | Dosage (Kg) |
| Silane-modified aqueous polyurethane resin | 40 |
| Kyanite micro powder | 20 |
| Silicon nitride powder | 20 |
| Titanium white powder | 2 |
| Sepiolite | 5 |
| Water (W) | 13 |
| Total up to | 100 |
(2) Preparation process
After the silane modified waterborne polyurethane resin is prepared, adding the kyanite micro powder, the silicon nitride powder, the titanium dioxide and the sepiolite according to the proportion, simultaneously adding water, continuously stirring at high speed for 30-45 minutes, and controlling the temperature at 60-65 ℃ to prepare the high-temperature-resistant environment-friendly steel structure fireproof coating.
The kyanite has the chemical formula: the Al2SiO5 is added into the raw material,
the specific gravity is 3.53-3.64; melting point 1850 ℃.
The kyanite has a series of excellent performances of high-temperature expansion, acid and alkali resistance, corrosion resistance, strong impact resistance, good electrical insulation performance and the like, and can be used for manufacturing high-grade refractory materials, refractory mortar, cement and cast products.
According to the characteristics of stable volume and no shrinkage of the kyanite at high temperature, the kyanite has lower cost and good performance than other high-aluminum refractory materials, and the refractoriness reaches more than 1825 ℃; the heat capacity is 12% higher than that of the clay brick, and the smelting time can be shortened and the energy consumption can be reduced when the clay brick is used in a kiln;
high-purity kyanite is a main raw material for manufacturing mullite. Mullite has the characteristics of high refractoriness, low thermal expansion, strong chemical corrosion resistance, high mechanical strength, strong thermal shock resistance, long service life and the like, and is a high-quality high-temperature refractory material. The plastic material prepared by taking the kyanite and the clay mineral as main raw materials has better thermal shock resistance than sintered shaped refractory materials and unshaped refractory materials.
The performance detection of the high-temperature-resistant environment-friendly steel structure fireproof coating disclosed by the invention comprises the following steps:
according to local Standard DB 11/1245-2015
Fire limit requirement (h): 2.0; thickness (mm) of fire retardant coating: not less than 4.5
Example 2
Preparation of a high-temperature-resistant environment-friendly steel structure fireproof coating:
(I) preparation of silane-modified aqueous polyurethane resin
(1) The ingredients were as shown in the following table:
| components | Dosage (Kg) |
| Polyhydric alcohols | 10.3 |
| Polyisocyanates | 17 |
| Chain extender | 1.5 |
| Crosslinking agent | 1.2 |
| Triethylamine | 5.3 |
| Coupling agent | 0.4 |
| Film forming aid | 1.3 |
| Total up to | 37 |
(2) Preparation process
Adding polyol, polyisocyanate, a chain extender and a cross-linking agent into a reaction kettle according to the ingredients, heating to 60 ℃, adding triethylamine and a coupling agent, adding a film-forming aid in the reaction process, and adding a proper amount of a dispersing aid according to the needs, stirring and dispersing to obtain the silane modified waterborne polyurethane resin.
(II) preparing the high-temperature-resistant environment-friendly steel structure fireproof coating
(1) The components and the mixture ratio of the high-temperature-resistant environment-friendly steel structure fireproof paint are detailed in the following table:
(2) preparation process
After the silane modified waterborne polyurethane resin is prepared, adding the kyanite micro powder, the silicon nitride, the titanium dioxide and the sepiolite, adding water, continuously stirring for 30-40 minutes, and controlling the temperature to be 60-63 ℃ to prepare the high-temperature-resistant environment-friendly steel structure fireproof coating.
The performance detection of the high-temperature-resistant environment-friendly steel structure fireproof coating disclosed by the invention comprises the following steps:
according to local standard DB 11/1245-2015
Fire limit requirement (h): 2.0; thickness (mm) of fire retardant coating: not less than 4.5
Example 3
Preparation of a high-temperature-resistant environment-friendly steel structure fireproof coating:
(I) preparation of silane-modified aqueous polyurethane resin
(1) The ingredients were as shown in the following table:
(2) preparation process
Adding the polyol, the polyisocyanate, the chain extender and the cross-linking agent into a reaction kettle according to the ingredients, heating to about 65 ℃, adding the triethylamine and the coupling agent, adding the film-forming assistant and a proper amount of dispersant during the reaction, and dispersing at a high speed to obtain the silane modified waterborne polyurethane resin.
(II) preparing the high-temperature-resistant environment-friendly steel structure fireproof coating
(1) The main components and the mixture ratio of the high-temperature-resistant environment-friendly steel structure fireproof paint are detailed in the following table:
| components | Dosage (Kg) |
| Silane-modified aqueous polyurethane resin | 37 |
| Kyanite micro powder | 18 |
| Silicon nitride powder | 20 |
| Titanium white powder | 2 |
| Sepiolite | 3 |
| Water (W) | 20 |
| Total up to | 100 |
(2) Preparation process
After the silane modified waterborne polyurethane resin is prepared, adding the kyanite micro powder, the silicon nitride, the titanium dioxide and the sepiolite, adding water, continuously stirring for 30 minutes, and controlling the temperature to be 65-68 ℃ to prepare the high-temperature-resistant environment-friendly steel structure fireproof coating.
The performance detection of the high-temperature-resistant environment-friendly steel structure fireproof coating disclosed by the invention comprises the following steps:
according to local Standard DB 11/1245-2015
Fire limit requirement (h): 2.0; thickness (mm) of fire retardant coating: not less than 4.5
Having described embodiments of the present invention, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (3)
1. A preparation method of a high-temperature-resistant environment-friendly steel structure fireproof coating is characterized by comprising the following steps:
firstly, 28-34 parts of polyol, polyisocyanate, a chain extender and a cross-linking agent by weight are put into a reaction kettle for heating reaction, 4-5.5 parts of triethylamine, 0.4-1 part of a coupling agent and 1-2 parts of a film-forming assistant are added, and high-speed dispersion is carried out to prepare the silane modified waterborne polyurethane resin;
and secondly, taking 35-40 parts of alkane modified waterborne polyurethane resin according to the weight part ratio, adding 18-20 parts of kyanite micro powder, 18-20 parts of silicon nitride, 2-3 parts of titanium dioxide, 3-6 parts of sepiolite and 13-23 parts of water, stirring at a high speed, and uniformly mixing to obtain the high-temperature-resistant environment-friendly steel structure fireproof coating.
2. The method for preparing the fire retardant coating with the high temperature resistant and environment-friendly steel structure as claimed in claim 1, wherein in each step, the temperature is controlled to be 60-70 ℃.
3. The high-temperature-resistant environment-friendly steel structure fireproof coating produced by the preparation method of the high-temperature-resistant environment-friendly steel structure fireproof coating of claim 1 or 2.
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| CN105036772A (en) * | 2015-07-13 | 2015-11-11 | 湖州南浔御豪家居有限公司 | Refractory artificial quartz stone board |
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| WO2013111731A1 (en) * | 2012-01-23 | 2013-08-01 | ニチアス株式会社 | Coating agent for molded refractory articles, method for producing coating agent for molded refractory articles, and method for applying coating agent for molded refractory articles |
| CN102977647A (en) * | 2012-11-08 | 2013-03-20 | 沈阳信达信息科技有限公司 | Fire-proof insulation coating |
| CN104496497A (en) * | 2014-12-15 | 2015-04-08 | 滁州金诺实业有限公司 | Heat-insulation fireproof coating applied to pre-buried pipe of vacuum cast aluminium alloy casting |
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