Patent Number: 7,825,165

Title: Process or improving the insulating capacity of expanded vinyl aromatic polymers and the products thus obtained

Abstract: Process for improving the insulating capacity of expanded vinyl aromatic which comprises: 1) preparing beads of expandable vinyl aromatic polymers containing 1-10% by weight, calculated with respect to the polymer, of an expanding agent englobed in the polymeric matrix and 0.001-25% by weight, calculated with respect to the polymer (a), of an athermanous additive comprising carbon black homogeneously distributed in the polymeric matrix; 2) treating the surface of the beads, before deposition of the coating, with a liquid lubricating agent; and 3) thermally treating the beads with hot air at a temperature ranging from 30 to 60.degree. C.

Inventors: Ghidoni; Dario (Gonzaga, IT), Ponticiello; Antonio (Mozzecane, IT), Simonelli; Alessandra (Mantova, IT), Zamperlin; Loris (Porto Mantovano, IT)

Assignee: Polimeri Europa S.p.A.

International Classification: C08J 9/22 (20060101)

Expiration Date: 2019-11-02 0:00:00