Flame Retardant Vinyl Ester Resin

Flame Retardant Vinyl Ester Resin combines the chemical resistance and mechanical properties of standard bisphenol A vinyl ester with reactive halogen (chlorinated or brominated epoxy backbone modification) or phosphorus flame retardant chemistry to achieve fire performance ratings required for chemical plant, marine, and industrial infrastructure applications.

The reactive flame retardant approach ensures permanent, non-leachable FR performance. The brominated variant achieves LOI >30% and UL 94 V-0 compliance, while the halogen-free phosphorus variant achieves LOI >26% with no HCl/HBr generation on combustion. ATH filler (30-40 phr) addition further enhances both FR performance and smoke suppression.

Viscosity at 25°C is 400-800 mPa·s, suitable for hand lay-up and spray-up. The resin maintains good chemical resistance to acids, alkalis, and solvents — superior to FR versions of UPR. It is specifically designed for FRP chemical plant ductwork, scrubber internals, and structural panels in environments where both corrosion resistance and fire performance are required simultaneously, eliminating the need for halogen-free coatings over standard vinyl ester.