Expandable Polystyrene Composition and Process for Making Same
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United States of America Patent
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Issued Date -
Mar 20, 2008
app pub date -
Jun 30, 2005
filing date -
Jul 13, 2004
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Abandoned
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Abstract
An expandable polystyrene composition in the form of beads is disclosed, comprising: (1) 100 parts by weight of a styrene polymer having in particular a weight-average molecular weight Mw ranging from 150 000 to 400 000 daltons, (2) from 3 to 20 parts by weight of a blowing agent, which is water or a mixture of water with at least one other blowing agent for example a hydrocarbon (3) from 0.1 to 12 parts by weight of at least one modified clay with an at least partially lipophilic nature. Also disclosed is a process for making the compositions.
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