What materials are mainly used for fire retardant coatings? The building materials in our life require not only firmness and beauty, but also fireproof and waterproof effects. Corresponding fire prevention measures should be taken according to fire prevention requirements. The following describes in detail what materials are mainly used for fire retardant coatings.
What are the main materials of fire retardant coatings? 1 1, non-expansive concrete fireproof coating, which is made of inorganic binder, organic binder and fireproof heat insulation material. Low density, good adhesion, good thermal insulation, aging resistance, good weather resistance and convenient construction. In case of fire, a layer of oxygen-insulating refractory glaze will be formed on the surface of the coating, which can ensure that concrete members will not crack or collapse within 2 hours.
2. Thick steel structure heat insulation and fire retardant coating is composed of porous heat insulation materials, adhesives and performance regulators, and does not contain asbestos. Because of the thermal insulation coating, the protected steel structure has the functions of inhibiting combustion and preventing flame spread after fire, which significantly improves the fire resistance rating.
3. Thin fire retardant coating for steel structure is made of binder and fire-resistant and heat-insulating materials through grinding, stirring and mixing. The coating is water-based and has no pollution to the environment, but the construction and storage temperature should be >: 0℃, which is suitable for spraying and brushing, and spraying is the best. After the coating is formed, the corresponding color can be adjusted according to moisture resistance, weather resistance, corrosion resistance and aging resistance. The effect is concave-convex pits. According to the requirements of engineering effect, it can also be smoothed.
What is the main material for fire retardant coating 2 1? Binders are film-forming substances, and some of them are also called binders and adhesives, which play a decisive role in the performance of coatings. Commonly used binders at home and abroad are inorganic binders and organic binders. Commonly used inorganic binders include silicate (LiSiO3, K2SiO3, Na2SiO3), phosphate [Al2(HPO4)3], copper oxide, phosphoric acid, etc. There are many kinds of organic binders (synthetic resins), including phenolic resin, alkyd resin (mainly halogenated alkyd resin) and halogenated olefin resin (such as perchloroethylene resin). ) can be used as a binder for fire retardant coatings.
Amino resin, formaldehyde resin, urea-formaldehyde resin, etc. ), tar resin, furan resin, heterocyclic resin (such as polyamide, etc. ), elemental organic resin (such as silicone, etc. ), rubber (such as chlorinated rubber), etc. And many emulsions with water as solvent.
Such as polyvinyl acetate emulsion, acrylic emulsion, styrene-butadiene emulsion, tertiary carbon emulsion and various poly emulsions. Film forming agent has great influence on the properties of intumescent fire retardant coatings. When it is matched with other components, it not only ensures that the coating has various performances under normal working conditions, but also makes the coating have flame retardancy and excellent expansion effect under the action of flame or high temperature.
2. The function of pigments and fillers in fire-retardant coatings is the same as that of ordinary coatings, which not only makes the fire-retardant coatings have the necessary color and decoration, but also improves the mechanical and physical properties (wear resistance, weather resistance and so on). ) and chemical properties (acid and alkali resistance, corrosion resistance, rust resistance, water resistance, etc. ) fire retardant coating.
Rutile titanium dioxide is a white pigment, which is widely used in outdoor coatings. Replacing part of titanium dioxide with antimony white powder can improve the fire prevention effect. For intumescent fire retardant coatings, the proportion of inorganic filler is small, because its content is too high, which will affect the foaming height of the coating, thus failing to achieve the purpose of heat insulation. However, a small amount of pigments and fillers is essential, because it can make the foam layer more dense and firm, thus improving its fire resistance.
Generally, the construction thickness of fire retardant coatings is large, and the lower pigment component can meet the requirements of hiding power, so it is unnecessary to use more inorganic pigments and fillers. Commonly used coloring pigments are titanium dioxide, zinc oxide, iron yellow, iron oxide red and so on.
3. The use of solvent (dispersion medium) in solvent coatings is beneficial to the dispersion of components in production, reducing the viscosity of materials in construction and helping to obtain uniform and continuous coatings. Water-based fire retardant coatings use water as solvent or dispersion medium, and solvent-based fire retardant coatings use organic solvent as dispersion medium. Commonly used organic solvents are No.200 solvent gasoline, toluene, xylene, acetone, butyl acetate, n-butanol and so on.
4. Additives and special additives, as auxiliary components in fire retardant coatings, are used in small amounts, but they play a great role. It can greatly improve the leveling, flexibility, adhesion, stability and other properties of coatings.
Commonly used plasticizers include organic phosphate (triphenyl phosphate, triphenyl phosphate, trichloroethylene phosphate, etc.). ), chlorinated paraffin, chlorinated biphenyl, dibutyl phthalate, etc. Commonly used heat stabilizers are epichlorohydrin and epoxidized soybean oil. Other additives, such as surfactants, anti-aging agents, anti-ultraviolet agents, etc., are also very important to coatings and can be added as appropriate according to the scope of use.
What materials are mainly used for fire retardant coatings? 3 1, flame retardant glass.
Fireproof glass has the characteristics of good light transmission, fire resistance, heat insulation and sound insulation. There are three kinds of common fire-proof glass in the market, namely, laminated composite fire-proof glass, wire-sandwiched fire-proof glass and hollow fire-proof glass. Fireproof glass can be used in jewelry stores, book archives, commercial buildings, hotels, hospitals, airports, stations, docks and other public places.
2, fire retardant coating
Fire retardant coating is a special kind of fire retardant coating, which consists of chlorinated rubber, paraffin wax and flame retardant additives. It has good fire resistance. When it meets fire, it will automatically expand to produce 200 mm thick foam, which will be carbonized into a protective layer. It is suitable for fire prevention in power plants, substations and other areas.
3, fireproof plugging materials
The fireproof plugging material is used to plug the fireproof separation formed when cables, air ducts and natural gas pipelines pass through walls and floors, so as to prevent the fire from spreading through gaps, play a fireproof role and facilitate installation. Fireproofing materials include organic fireproof materials, inorganic fireproof materials and fireproof bags.
4, fireproof wooden window frame
Wooden sealing material is designed around the fireproof wooden window frame, which can prevent the flame from drilling out of the gap when it encounters thermal expansion, and can resist fire for 30 minutes even if the fire is fierce. This kind of window frame is made of pine, and the sealing material made of graphite is stuck around it, which can block the tiny gaps and increase the fire prevention effect. According to experiments, its fire protection effect is several times that of aluminum window frames.
5, fire shutter
If it is inconvenient to set up a firewall, you can install a fire shutter, which has good functions of fire prevention, heat insulation, smoke isolation and wear resistance.
6, fire and moth-proof wood
First, wood is soaked in a solution containing cations such as calcium and aluminum. After the chemical reaction of the two ions, a ceramic-like substance will be formed, which will be filled in the gaps of cell tissues, so that wood has the performance of fire prevention and moth prevention.