Firemaster 520, tetrabromophthalic based diol, is a low viscosity, high reactivity flame retardant primarily used in Class 1 and Class 2 rigid polyurethane foam. The higher reactivity profile of Firemaster 520 offers greater processing latitude and improved polymer curing in comparison to PHT4-Diol. Other application areas include polyurethane RIM, elastomers, coatings, adhesives and fibers.

Product Features

• Lower viscosity than PHT4-DIOL
• Higher reactivity profile than PHT4-DIOL
• Drop-in replacement by weight for PHT4-DIOL in most applications
• Exhibits excellent compatibility with a broad range of commercial polyols and blowing agents.