Germany’s Lehmann&Voss (U.S. office in Pawcatuck, Conn., has developed a new polymer-based flame retardant that is said to be ideally suited for producing flame-retardant XPS panels without using HBCD (hexabromocyclododecane).
Says developer of the new FR Marion Henkens, “Thanks to good, comprehensive stabilization, we have succeeded in reducing the degradation of the flame-retardant system, and in this way minimized any discoloration. Comprehensive tests at the Fraunhofer Institute for Chemical Technology (ICT) demonstrated outstanding compatibility of new Lovobatch PS FR 0339 with standard XPS components and as a result flawless processing as XPS panels with high-quality requirements. According to the company, the influence of the flame-retardant batch on the properties of the finished foam is very slight. In particular, the value of heat conductivity of the XPS panel, important for insulation applications, remained practically unchanged when using the new flame retardant.