COMPOSITE MATERIAL BASED ON VINYL AROMATIC POLYMERS HAVING ENHANCED THERMAL INSULATION PROPERTIES AND PROCESS FOR THE PREPARATION THEREOF

摘要

Expandable particle composite material suitable for the preparation of ex panded materials having a density lower than 40g/l and a content of closed c ells of at least 60%, characterized by the presence of heterophase cavities and/or heterophase domains, whose matrix is a synthetic thermoplastic resin having at least 60% by weight of a vinyl aromatic polymer and in which an ex panding system is contained, together with a heterogeneously distributed gra phite material, having a graphitization degree, calculated by means of the M aire and Mering formula, of at least 0.2.