In February 2026, phosphorus-based flame retardants have attracted wide attention as core products in the halogen-free flame retardant field. Their low smoke, low toxicity and environmental friendly characteristics meet the development needs of the industry, and they have become important chemical additives in insulation, building materials and other fields. Such flame retardants are divided into inorganic and organic phosphine types. Inorganic phosphorus includes black phosphorus and red phosphorus, while organic phosphine takes DOPO and DPO as the common industrial representatives. Both can achieve flame retardancy by forming a stable carbonization layer, among which organic phosphine flame retardants have become a research hotspot due to their excellent performance.
     DOPO can synthesize a variety of derivatives with high reactivity and has better thermal stability than ordinary organic phosphate esters, but it has problems such as high dosage and poor moisture resistance when modifying epoxy resins. Studies have found that the epoxy composite modified by DPO with a phosphorus content of 15.32% is superior to the DPO modified product in thermal stability and glass transition temperature, and can reach the UL-94 V-0 flame retardant grade with low phosphorus content. However, both types of flame retardants contain P-O bonds, which are easy to deliquesce when exposed to water and decompose at high temperatures, and structural modification is still needed to break through performance bottlenecks.

    For more information, please click: https://www.tiktok.com/@mia_iota/video/7597717976720149782