composições de polímeros vinilaromáticos expansíveis, artigos expandidos, folhas expandidas extrusadas, e, processos para preparar as composições de polímeros vinilaromãticos expansíveis, para preparar através de polimerização em massa contínua as composições de polímeros vinilaromáticos expansíveis, e para produzir as folhas de polímero vinilaromático expandidas extrusada

摘要

Expandable vinyl aromatic polymers comprising: —a matrix obtained by polymerizing 50-100% by weight of one or more vinyl aromatic monomers and 0-50% by weight of at least one co-polymerizable monomer; —1-10% by weight, calculated with respect to polymer (a), of an expanding agent embedded in the polymeric matrix; 0-25% by weight, calculated with respect to polymer (a), of a filler comprising carbon coke having an average diameter of between 0.5 and 100 μm, with a surface area, measured according to ASTM D-3037/89, ranging from 5 to 200 m2/g; 0.05-10% by weight, calculated with respect to polymer (a), of expanded graphite in particle form, with a particle average diameter (size) ranging from 1 to 30 μm, a surface area, measured according to ASTM D-3037/89, ranging from 5 to 500 m2/g and a density ranging from 1.5 to 5 g/cm3.