What materials are mainly used for fire-retardant coatings

What materials are mainly used for fire-retardant coatings? The building materials in our life require not only firmness and beauty, but also fire-retardant and waterproof effects. Relevant fire-retardant measures should be taken according to fire-fighting requirements. The following details introduce what materials are mainly used for fire-retardant coatings. What materials are mainly used for fire-retardant coatings? 1

1. Non-expansive concrete fire-retardant coatings are fire-retardant and heat-insulating coating materials made of inorganic binders, organic binders and fire-resistant and heat-insulating materials. It has low density, good adhesion, good thermal insulation, aging resistance, weather resistance and easy construction. Once a fire occurs, an oxygen-insulating and fire-resistant glaze layer will be formed on the surface of the coating, which can ensure that concrete members will not crack and collapse within 2 hours.

2. Thick steel structure heat insulation and fire retardant coating is composed of porous heat insulation material, adhesive and performance regulator, and does not contain asbestos. Because of the thermal insulation coating, the protected steel structure has the function 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 by grinding, stirring and mixing binder and fire-resistant insulation materials. The coating is water-based and has no pollution to the environment, but the construction and storage temperatures should be >: 1℃。 It is suitable for spraying and brushing, and spraying is the best. After the coating is formed into a film, the corresponding colors can be adjusted for moisture resistance, weather resistance, corrosion resistance and aging resistance. The effect is concave and convex pits. According to the requirements of engineering effect, it can also be smoothed. What materials are mainly used in fire-retardant coatings? 2

1. The base materials are film-forming substances, and some are called binders and binders, which play a decisive role in the performance of coatings. The commonly used binders at home and abroad include 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), such as phenolic resin, alkyd resin (mainly halogenated alkyd resin), halogenated olefin resin (such as perchloroethylene resin, etc.)

amino resin formaldehyde resin, urea-formaldehyde resin, etc.), tar resin, furan resin, heterocyclic resin (such as polyamide, etc.), elemental organic resin (such as silicone resin, etc.) and rubber (such as chlorinated rubber). Film forming agent has great influence on the properties of intumescent fire retardant coatings. It is matched with other components, which not only ensures that the coating has various use properties 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. pigments, fillers and pigments have the same functions as ordinary coatings, which not only make the fireproof coatings have the necessary colors and decorative properties, but also improve the mechanical and physical properties (wear resistance, weather resistance, etc.) and chemical properties (acid and alkali resistance, corrosion resistance, rust resistance, water resistance, etc.) of the fireproof coatings.

Rutile titanium dioxide is a white pigment widely used in outdoor paint. 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 pigment filler is essential, because it can make the foam layer denser and stronger, thus improving its fire resistance.

Generally, the construction thickness of fireproof coating 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. The commonly used colored pigments are titanium dioxide, zinc oxide, iron yellow, iron oxide red and so on.

3. Solvent (dispersion medium) is used in solvent coatings, which facilitates the dispersion of components in production, reduces the viscosity of materials in construction, and helps to obtain a uniform and continuous coating. 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.211 solvent gasoline, toluene, xylene, acetone, butyl acetate, n-butanol and so on.

4. auxiliaries and special additives are used as auxiliary components in fire-retardant coatings, but the dosage is small, but the effect is great. It can greatly improve the leveling, flexibility, adhesion, stability and other properties of coatings.

Commonly used plasticizers include organic phosphate (tricresyl phosphate, triphenyl phosphate, trichloroethylene phosphate, etc.), chlorinated paraffin, chlorinated biphenyl, dibutyl phthalate (octyl ester), etc. Heat stabilizers are commonly used such as epichlorohydrin and epoxidized soybean oil. Other additives, such as surfactants, anti-aging agents and anti-ultraviolet agents, are also very important to coatings, and can be added as appropriate according to the scope of use. What are the main materials for fire-retardant coatings? 3

1. Fire-retardant glass

Fire-retardant glass has the characteristics of good light transmission, fire resistance, heat insulation and sound insulation. There are three kinds of common fire-retardant glasses in the market, namely sandwich composite fire-retardant glass, wire-sandwiched fire-retardant glass and hollow fire-retardant glass. Fireproof glass can be used in public areas such as jewelry shops, books and archives, commercial buildings, hotels, hospitals, airports, stations and docks.

2. Fire-retardant coating

Fire-retardant coating is a special fire-retardant protective coating, which is composed of chlorinated rubber, paraffin wax, fire-retardant additives and other raw materials. It has good fire resistance. When it meets fire, it will automatically expand to produce a foam with a thickness of 211mm and carbonize into a protective layer, which is suitable for power plants, substations and other areas to play a role in fire protection.

3. fireproof plugging materials

fireproof plugging materials are used to plug the fireproof separation formed when cables, air pipes, natural gas pipes and the like pass through walls and floors, so as to prevent the fire from spreading through gaps, which plays a fireproof function and is convenient to install. Fireproof plugging materials include organic fireproof plugging materials, inorganic fireproof plugging 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 through the gap if it encounters thermal expansion, and can resist fire for 31 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 fine cracks and increase the fire prevention effect. According to the experiment, its fireproof effect is several times that of aluminum window frame.

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-proof and moth-proof wood

First, soak the wood in a solution containing cations such as calcium and aluminum. After the two ions react chemically, the ceramic-like substances will be filled into the gaps of cell tissues to make the wood have fire-proof and moth-proof properties.