EXPANDED ARTICLES WITH EXCELLENT RESISTANCE TO SOLAR RADIATION AND OPTIMUM THERMOINSULATING AND MECHANICAL PROPERTIES
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United States of America Patent
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Issued Date -
Apr 19, 2012
app pub date -
Apr 23, 2010
filing date -
May 5, 2009
priority date (Note) -
Abandoned
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Abstract
A thermoinsulating expanded article with improved resistance to solar irradiation, which includes an expanded polymeric matrix, obtained by the expansion and sintering of beads or granules containing a vinyl aromatic (co)polymer, where the interior of the beads or granules contains a homogeneously dispersed filler containing at least one athermanous material selected from coke, graphite and carbon black and optionally contains an active inorganic additive within the wave-lengths ranging from 100 to 20,000 cm−1. The polymeric matrix contains a copolymer of styrene and at least one vinyl aromatic comonomer substituted in the ring or on the vinyl group, a mixture of polystyrene and up to 10% by weight, with respect to the mixture, of a thermoplastic polymer compatible with polystyrene and having a Tg>100° C., or both.
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