Intumescent composite

Details Intumescent composite Intumescent composite

1993-03-12

1996-03-12

Ryan, Patrick J.

Stock material or miscellaneous articles

Self-sustaining carbon mass or layer with impregnant or...

428 71, 428212, 4283055, 4283056, 4283191, 428913, 4283066, B32B 900

Patent

active

054984661

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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