Behavior of intumescent epoxy resins in fireproofing applications

► The thermal degradation process of an intumescent epoxy resin was investigated. ► The swelling process during thermal degradation was analyzed. ► A lumped kinetic model for thermal degradation was developed. ► Conversion dependent models were obtained for density, porosity and thermal conductivity. ► Models obtained are crucial to allow an improved description of fireproofing performance.