Intumescent composite
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United States of America Patent
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Mar 12, 1996
Grant Date -
N/A
app pub date -
Mar 12, 1993
filing date -
Mar 12, 1993
priority date (Note) -
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status (Latency Note)
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Abstract
An intumescent firestop device having a layer of non-curing moldable two-stage intumescent composite and a restraining layer. When the firestop device is installed around a pipe near the wall opening through which the pipe runs, the intumescent composite exudes into the annular space between the pipe and the wall opening thereby forming a cold-gas seal. The composite is a two-stage intumescent composite that contains two different intumescent components that begin to intumesce at two different temperatures to form a hard char.
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Cited Art Landscape
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