Patent ID: 9169638
Filing Date: 2015-10-27
Classification: C08J,E04B

Abstract:
1. An expandable vinyl aromatic polymer comprising: a) a matrix of a vinyl aromatic polymer, b) 1-10% by weight calculated with respect to the vinyl aromatic polymer, of an expanding agent englobed in the matrix, c) 0.1 to 5% by weight calculated with respect to the vinyl aromatic polymer, of talc having a mean diameter above about 8 μm, said mean diameter being measured by Laser Mastersizer according to standard ISO 13320-1, the BET of the talc being in the range 0.5-25 m d) carbon black in a proportion sufficient for a foamed material obtained from the expandable vinyl aromatic polymer to have a thermal conductivity λ of about 34 mW/m° K or lower, e) 0-20% by weight, calculated with respect to the vinyl aromatic polymer, of one or more fillers, other than talc and carbon black, homogeneously distributed in the matrix.