Particulate-shaped, expandable styrol polymers and method for the production thereof
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United States of America Patent
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Oct 15, 2002
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N/A
app pub date -
Jul 24, 2001
filing date -
Jan 25, 1999
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Abstract
Particulate, expandable styrene polymers capable of being processed into hard foamed plastic materials of a small density and containing, therefore, at least one foaming agent comprise at least aluminum in a particulate form for improving their thermal insulation properties. The styrene polymer particles comprise, after their expansion, a fine cell structure and contain the aluminum particles incorporated in a homogeneous distribution as an infrared ray reflecting material. The main proportion of these aluminum particles has the shape of platelets having a size between 1 and 15 .mu.m. Styrene polymer particles produced in this manner can be foamed into plastic materials of foamed polystyrene particles which have a density of 30 g/l in maximum and improved heat insulation characteristics.
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