FRX Polymers LLC in Chelmsford, Mass., is a two-year-old company that is developing entirely new polymers based on phosphonate.

FRX Polymers LLC in Chelmsford, Mass., is a two-year-old company that is developing entirely new polymers based on phosphonate. They are clear, tough, and inherently very flame-retardant engineering resins with some similarities to polycarbonate. Polyphosphonates were developed and patented by Dr. Dieter Freitag, chief technology officer of FRX and the Plastics Hall of Fame scientist who developed the polycarbonate CD and high-heat PC resins at Bayer AG in Germany. Polyphosphonates are being commercialized as a homopolymer (FRX100) and as block copolymers with PC. The copolymers are FRXCO25, FRXCO35, and FRXCO85 with 25%, 35%, and 85% polyphosphonate content respectively. FRX copolymers are moldable or extrudable thermoplastics with higher melt flow and flame resistance than PC but lower heat and impact resistance, depending on copolymer ratio. Homopolymer is marketed as a non-halogen flame retardant for blending with other resins. Compared with typical FR additives, it has the advantages of permanence and not affecting host resin mechanical properties. The first FRX polymers are available for limited sampling from FRX’s pilot plant in Chelmsford. A 1-million-lb/yr semi-works plant is being built in Switzerland. (978) 244-9500 • www.frxpolymers.com