| abstract |
A flame retarded foam-making plastic composition comprises a suspension polymerized polystyrene type resin; a brominated flame retardant having a Br content greater than 60% by weight and a 5 wt% loss temperature of 190-320°C ; a hindered amine of 4-hydroxy-2,2,6,6-tetramethylpiperidine carboxylate series, and a blowing agent, said flame retardant and said hindered amine being present in said polystyrene type resin before impregnating said resin with said blowing agent. |