Method of producing phenolic foam using pressure and foam produced by the method
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United States of America Patent
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Dec 27, 1983
Grant Date -
N/A
app pub date -
Oct 9, 1980
filing date -
Oct 9, 1980
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The present invention is directed to a method of producing phenolic foams comprising introducing into a substantially closed volume a phenolic resole resin foamable composition and allowing the composition to foam in this volume wherein a pressure in excess of ambient atmospheric pressure is achieved within this volume. This pressure in excess of ambient atmospheric pressure generally is in excess of about 2 pounds per square inch, typically in excess of about 5 pounds per square inch, and preferably in excess of about 6 pounds per square inch, gauge pressure. The present invention is also directed to foams produced by the method of the invention.
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