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

摘要

pExpandable particle composite material suitable for the preparation of expanded materials having a density lower than 40 g/1 and a content of closed cells of at least 60%, is 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 expanding system is contained, together with a heterogeneously distributed graphite material, having a graphitization degree, calculated by means of the Maire and Mering formula (see specification), of at least 0.2./p[GB2449353A]