Flameproof polystyrene foam and process for the manufacture thereof

摘要

The flameproof styrene polymer foam in accordance with this invention is obtained by melting a granular mixture of styrene polymer and aluminum hydroxide having a grain size of 20-100 mu m and a specific surface of below 1 m2/g in an extruder, incorporating a physical expanding agent, and homogenizing and extruding the mixture.