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US 5,498,466 AGranted
Intumescent composite
AssigneesInternational Protective Coatings Corp., Pyro-Tech Industries, Inc.
InventorsMario Navarro, Gabe DiMarino
Life of this patent
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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.
Claims7
An intumescent composite, comprising:
- (a) a first intumescent component;
- (b) a second intumescent component, wherein said first intumescent component inmmesces at a first temperature and said second intumescent component intumesces at a second temperature, wherein said second temperature is different from said first temperature, wherein:
- said first intumesCent component comprises graphite;
- and
- said second intumescent component comprises a polyhydric alcohol and a melamine/uninhibited formaldehyde syrup.
2 more elements
Dependencies are inferred from the claim text.