Method of manufacturing fire retardant polystyrene insulating board
Number of patents in Portfolio can not be more than 2000
United States of America
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Jul 7, 1992
Grant Date -
N/A
app pub date -
Mar 28, 1988
filing date -
May 11, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Fire retardant polystyrene insulating material is manufactured from expandable polystyrene beads in admixture with a phenol-formaldehyde or melamine-for-maldehyde resin in resole form, the resin containing a blowing agent and a surfactant. The insulating material is formed from the bead-resin mix by applying dielectric heating to foam the resin, expand the beads, and cure the foamed resin to a closed cell structure.
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