EXTRUDED STYRENE RESIN FOAM AND PROCESS FOR PRODUCING THE SAME

摘要

An extruded foam obtained by subjecting a styrene resin to extrusion foaming and excellent in suitability for the environment and in flame retardancy and heat-insulating properties. It is characterized by having been obtained with one or more foaming agents comprising 100 to 10 wt.% at least one C3-5 saturated hydrocarbon and 0 to 90 wt.% other foaming agent based on all the foaming agents and by containing (A) a halogenated flame retardant and (B) at least one compound selected from the group consisting of phosphorus compound flame relardants having a nitrogen atom in the molecule, tetrazole compounds, cyanuric acid and derivatives thereof, isocyanuric acid and derivatives thereof, metal borates, and boron oxide.