Process for expanding microspheres
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United States of America Patent
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-
Apr 23, 1985
Grant Date -
N/A
app pub date -
Nov 22, 1983
filing date -
Nov 26, 1982
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A process for expanding expandable thermoplastic microspheres containing a blowing agent which will be volatilized at heating. A slurry of the unexpanded spheres is fed to a pressure zone together with steam whereby volatilization of the blowing agent occurs in the zone and the expanded microspheres are then allowed to leave the zone at a considerable pressure drop.
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Cited Art Landscape
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