Flame Retardant EcoFlame B-627 Tetrabromophthalic Anhydride Diol (RB-79/PHT4 Diol) for Rigid Polyurethane Foam

EcoFlame B-627 (RB-79/PHT4 Diol) is a highly efficient reactive brominated flame retardant diol, specifically engineered for polymer systems requiring integrated and durable fire protection. Chemically derived from tetrabromophthalic anhydride esterified with diethylene glycol and propylene glycol, it features a unique mixed ester/ether diol structure that delivers excellent thermal stability, high bromine content, and outstanding reactivity for covalent bonding.

This innovative product is designed primarily for rigid polyurethane foam, urethane elastomers, and flame-retardant coatings. Its reactive diol functionality enables seamless chemical incorporation into polyurethane chains during polymerization, ensuring permanent flame resistance without migration or leaching—ideal for applications demanding long-term reliability. With its high bromine content, it provides superior flame retardant efficiency, allowing end products to consistently meet stringent international safety standards including UL94, REACH, and RoHS compliance.

Key advantages include exceptional scorch resistance, which effectively minimizes discoloration and thermal degradation during high-temperature processing, alongside good compatibility with diverse polyol blends and modern CFC-free foam systems. It also contributes to enhanced hydrolytic stability and maintains optimal mechanical properties in cured polymers, ensuring durability under varied environmental conditions.

Available as a viscous liquid, EcoFlame B-627 facilitates easy dosing and homogeneous dispersion in production processes. It is ideally suited for demanding applications in construction insulation, industrial coatings, automotive interiors, and electronic encapsulation where uncompromising fire safety, material integrity, and regulatory compliance are essential.