The following is a sharing of knowledge related to halogen-free flame retardants:
First, Definition and characteristics
Definition: Halogen-free flame retardants, also known as halogen-free low-smoke environmentally friendly flame retardants or green and environmentally friendly inorganic flame retardant materials, are mainly a composite formula system with metal oxides as the main component, and various inorganic and organic substances are added. It contains no halogens, so it will not produce toxic gases when burning.
Characteristics: Non-flammable and non-explosive, low smoke emission, low toxicity, and excellent flame retardant performance.
Second, types and components
The common types of halogen-free flame retardants in the market mainly include nitrogen-containing inorganic compounds (such as magnesium chloride, aluminum hydroxide, etc.), sulfur-containing inorganic compounds (such as sodium sulfide), phosphorus-containing inorganic compounds, boron-containing silicates, and other types of inorganic substances.
Components: Halogen-free flame retardants mainly consist of phosphorus-based compounds and metal hydroxides, such as ammonium polyphosphate salts, polyetheramine salts, and organic fluorides, etc. These components do not produce toxic gases when burning and have good flame-retardant effects.
Third, mechanism of action
Endothermic reaction: Halogen-free flame retardants can absorb a large amount of heat at high temperatures, lowering the surface temperature, thereby effectively suppressing the generation of flammable gases and preventing the spread of combustion.
Forming a protective layer: Halogen-free flame retardants form a carbonized layer or protective layer on the material surface during combustion, isolating oxygen and heat, and further preventing the combustion from progressing.
Fourth, application fields
Halogen-free flame retardants are widely used in the flame retardant treatment of wires and cables to enhance their fire resistance rating and safety performance.
In the fire protection of electronic components and precision instruments, halogen-free flame retardants also play a significant role.
Halogen-free flame retardants can be used in the fireproof and thermal insulation systems of building materials to enhance the overall fire resistance performance of buildings.
Transportation: In vehicles such as aircraft, trains, and automobiles, halogen-free flame retardants are used for flame retardant treatment of interior materials, wires and cables, and other components to ensure the safety of passengers.
Furniture manufacturing: By adding halogen-free flame retardants, the fire resistance rating of furniture can be effectively enhanced, reducing the threat of fire to people’s lives and property.
Fifth, environmental protection advantages
Non-toxic and harmless: Halogen-free flame retardants do not produce toxic gases or smoke when burning, and are harmless to human health and the environment.
Recyclability: After the materials are used up, halogen-free flame retardants can usually be recycled and processed together with other materials, which is conducive to the reuse of resources.
Promoting the development of green chemistry: The research and application of halogen-free flame retardants have driven the development of green chemistry, which is in line with the concept of sustainable development.
Sixth, market trends and development prospects
Market demand growth: As people’s emphasis on environmental protection and safety continues to increase, the market demand for halogen-free flame retardants will keep growing.
Technological innovation: In the future, halogen-free flame retardants will develop in a more efficient, environmentally friendly and economical direction. Through technological innovation and research and development, the performance and application scope of halogen-free flame retardants can be further enhanced.
Regulatory promotion: Governments around the world will introduce more regulations and standards regarding the use of flame retardants, promoting the application and development of halogen-free flame retardants.
In conclusion, halogen-free flame retardants, with their excellent flame retardant performance, environmental advantages and wide range of application fields, have broad prospects for future development.
