composições de polímeros vinílicos aromáticos expansíveis, artigos expandidos, folhas estrusadas espandidas, e, processos para preparar as composições de polímeros vinílicos aromáticos expansíveis, e para a produção de folhas estrusadas expandidas

摘要

Expandable vinyl aromatic polymers which comprise: 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 copolymer izable monomer; 1-10% by weight, calculated with respect to the polymer (a), of an expanding agent englobed in the polymeric matrix; 0.05-25% by weight, calculated with respect to the polymer (a), of a filler comprising coke with a surface area, measured according to ASTM D-3037/89, ranging from 5 to 50 m2/g.