Polymer foam process
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United States of America Patent
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-
Jan 3, 1984
Issued Date -
N/A
app pub date -
Jun 10, 1981
filing date -
Jun 10, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Thermoplastic foams of polystyrene, for example, are prepared with a blowing agent which is a mixture of an organic plasticizing blowing agent, such as pentane, and an atmospheric gas, such as carbon dioxide. Typically, such foams prepared with organic blowing agent alone were aged prior to thermoforming the foam into articles. Foams prepared with the mixed blowing agent of this invention exhibit the advantage of reduced atmospheric emissions on aging.
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Cited Art Landscape
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