PROCESS FOR THE PREPARATION OF EXPANDABLE VINYL AROMATIC POLYMER PARTICLES CONTAINING HEXABROMOCYCLODODECANE

摘要

Fire-retardant expandable vinyl aromatic polymer beads are prepared by an aqueous suspension method whereby micronized hexabromocyclododecane and a volatile aliphatic hydrocarbon foaming agent are incorporated into particles of a thermoplastic such as polystyrene. The beads are useful in the preparation of molded foam articles having excellent resistance to flame.