Tetrabromobisphenol-A (TBBPA) is a commercial flame retardant used in rigid FR-4 printed wiring boards (PWB). It is the single largest volume brominated flame retardant in the world. In this application, the TBBPA is fully reacted into the epoxy resins that form the base material of the PWB. TBBPA's leadership position in the rigid printed wiring board market is due to several factors, including reliable performance over time. This paper will look at the benefits of TBBPA as a flame retardant in epoxy resin PWB. It will also address the current regulatory status of TBBPA and PWB recycle. An update on the status of the EU Risk Assessment on TBBPA and other industry assessments that compare TBBPA to alternative flame retardants for PWB will be included.
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