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中文简体1. Definition of flame retardant coating
Flame retardant coating is a kind of film with flame retardant function formed by mixing and coating components such as flame retardants, fillers, resins, etc. on the surface of the substrate using a specific process. This film can maintain structural stability at high temperatures, effectively delay the spread of fire, and buy precious time for personnel evacuation and fire rescue.
2. Types of flame retardant coatings
There are various types of flame retardant coatings, which can be divided into many types according to different classification standards. The following are some common classification methods:
Classification by ingredients:
Water-based flame retardant coating: with acrylic copolymer, magnesium oxide, aluminum hydroxide, etc. as the main ingredients, it has the advantages of non-toxic, odorless, and environmentally friendly.
Acrylic flame retardant coating: with acrylate as the main ingredient, the coating formed is difficult to burn and has good physical properties.
Silicate flame retardant coating: with silicate as the main ingredient, it can decompose and release water and carbon dioxide at high temperature to form a protective layer.
Classification by flame retardant mechanism:
Intumescent flame retardant coating: When heated, the flame retardant in the coating will decompose and produce gas, causing the coating to expand and form a porous structure, thereby isolating oxygen and reducing the combustion temperature.
Non-intumescent flame retardant coating: Mainly through the chemical reaction of the flame retardant at high temperature, a substance with flame retardant properties is generated, thereby inhibiting the spread of flames.
III. Flame retardant mechanism of flame retardant coating
The flame retardant mechanism of flame retardant coating is complex and diverse, mainly including the following:
Cooling effect: The coating decomposes at high temperature and releases a large amount of water or other volatile substances, which can quickly absorb heat and reduce the combustion temperature, thereby slowing down the combustion rate.
Isolating oxygen: The porous structure or carbonized layer formed by the expansion of the coating can isolate oxygen, causing the combustion reaction to stop due to lack of oxygen.
Inhibiting free radical chain reaction: The substances produced by the decomposition of the flame retardant at high temperature can react with the free radicals generated during the combustion process, thereby inhibiting the free radical chain reaction and controlling the combustion reaction.
Release of inert gas: Some flame retardant coatings release inert gases such as nitrogen and carbon dioxide at high temperatures. These gases can dilute the oxygen concentration in the combustion area, thereby slowing down the combustion rate.
4. Performance characteristics of flame retardant coatings
Flame retardant coatings have a variety of excellent performance characteristics, which make them widely used in construction, transportation, electronic appliances and other fields:
Excellent flame retardant performance: It can effectively delay the spread of fire in high temperature environments and reduce the occurrence of fire accidents.
Good physical properties: such as wear resistance, weather resistance, corrosion resistance, etc., can maintain its flame retardant function for a long time.
Environmental protection: Some flame retardant coatings such as water-based flame retardant coatings have the advantages of non-toxicity, odorlessness, and environmental protection, which meet modern environmental protection requirements.
Simple construction: It can be directly sprayed or brushed on the surface of the substrate, and the construction is convenient and fast.
5. Application fields of flame retardant coatings
Flame retardant coatings are widely used in construction, transportation, electronic appliances and other fields due to their excellent flame retardant properties and wide applicability:
Construction field: It is used for fire protection of building materials such as steel structures, wooden structures, and concrete structures to improve the overall fire resistance of buildings.
Transportation field: Fire-retardant coatings for vehicles such as automobiles, ships, and airplanes to improve the fire safety of vehicles.
Electronic and electrical field: Fire-retardant treatment for the shells, circuit boards and other components of electronic and electrical equipment to improve the flame retardant performance and safety of products.
Petrochemical field: Fire-retardant coatings for petrochemical equipment and pipelines to reduce the occurrence of fire accidents and ensure the safety of production facilities and personnel.
6. Development trend of flame-retardant coatings
With the continuous advancement of science and technology and the improvement of people's requirements for safety performance, the development of flame-retardant coatings shows the following trends:
Environmental protection: More and more flame-retardant coatings are beginning to use non-toxic, odorless, and environmentally friendly raw materials to reduce harm to the environment and human body.
Multifunctionality: Flame-retardant coatings are not only required to have excellent flame retardant properties, but also require multiple functions such as wear resistance, weather resistance, and corrosion resistance to meet the needs of different fields.
Intelligence: With the development of Internet of Things technology, flame-retardant coatings have also begun to develop in the direction of intelligence, such as adding sensors and other technical means to achieve real-time monitoring and early warning of fires.
Efficiency: Improve the flame retardant efficiency and performance stability of the flame retardant coating of flame-retardant blackout coated curtain fabric, reduce the occurrence of fire accidents, and contribute to building a safer and more reliable social environment.
