FLAME-RETARDANT POLYSTYRENE RESIN FOAM AND ITS PRODUCTION

摘要

PURPOSE:To obtain the title foam excelling in flame retardancy, showing self- extinguishing properties even when ignited and not dripping even in contact with a flame by incorporating a specified thermally expansible graphite in the foam. CONSTITUTION:A thermally expansible graphite prepared by coating graphite with a film-forming resin (e.g. acrylonitrile/butadiene copolymer) is incorporated in such an amount that the content of the graphite is 5-50wt.% and the content of the film-forming resin is 0.2-25wt.%.