Inorganic Phosphorus-Based Flame Retardant
Inorganic phosphorus-based flame retardants primarily include red phosphorus, ammonium polyphosphate, and phosphate salts. Red phosphorus, in particular, is a widely used flame retardant known for its high efficiency in reducing flammability, low dosage requirements, smoke suppression capabilities, and low toxicity. However, red phosphorus is susceptible to moisture absorption, oxidation, and the release of PH3 gas. It is also prone to dust explosion, and poor dispersion, and can cause polymer discoloration. To address these issues, red phosphorus is typically encapsulated to form micro-encapsulated red phosphorus or coated red phosphorus (MRP). The coating layer effectively inhibits the generation of PH3, reduces water absorption, improves the self-ignition temperature and thermal stability of red phosphorus, and enhances its dispersion and flame-retardant properties.
Applications of red phosphorus flame retardant
Red phosphorus flame retardants find wide application in various industries:
Plastics Industry
Red phosphorus flame retardants are widely used to enhance the flame retardant performance and smoke suppression effects of materials such as polyethylene, polypropylene, and polyvinyl chloride in the plastics industry.
Rubber Industry
Adding red phosphorus flame retardants to rubber products improves their heat resistance, and aging resistance, and provides good flame retardant properties.
Textile Industry
Red phosphorus flame retardants are used for the fireproof treatment of textiles, improving their flame retardant performance and smoke suppression effects to ensure people’s safety.
Electronics Industry
Red phosphorus flame retardants added to electronic products help prevent fire accidents caused by circuit failures and improve the safety performance of electronic devices.
Other Fields
Red phosphorus flame retardants are also applied in areas such as coatings, adhesives, and building materials to enhance fire resistance and smoke suppression effects.
The development of red phosphorus flame retardant
As awareness of fire safety and environmental protection increases, the demand for higher performance in red phosphorus flame retardants is growing. Future advancements in red phosphorus flame retardants will prioritize higher efficiency, environmental friendliness, reduced smoke generation, and non-toxic properties. Moreover, with the emergence of new materials and technological advancements, the application areas of red phosphorus flame retardants will continue to expand.
The features of red phosphorus flame retardant
High Flame Retardancy
Red phosphorus flame retardants significantly reduce the combustion rate and flame propagation speed of polymer materials, effectively preventing the spread of fire.
Good Smoke Suppression
During combustion, red phosphorus flame retardants release a large amount of non-reactive gas, which lowers the concentration of combustible gases and combustion temperature, while inhibiting smoke generation.
Excellent Stability
When mixed with polymer materials and subjected to heating or melting processes, red phosphorus forms a stable structure that is resistant to decomposition or migration. This ensures the long-term flame-retardant performance of the materials.
Non-toxic and Environmentally Friendly
The waste generated during the production and use of red phosphorus flame retardants can be recycled and treated without causing harm to the environment.
Red phosphorus flame retardants play an increasingly important role in fire safety. Understanding their composition, principles, advantages, and application areas helps us better comprehend and utilize this crucial fire-resistant material. With ongoing technological advancements and expanding application areas, red phosphorus flame retardants are expected to play an even more crucial role in the field of fire safety in the future.
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