Intumescent material

An electrically conductive intumescent sheet material which may have a thickness of 0.25 to 5 mm, a density of 100 to 500 kg m3, a volume expansion ratio of from 3:1 to 20:1 after 15 minutes at 450°C, a surface resistivity value of from 105 to 2 ohms/square, and/or an insertion loss value of at leas...

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Bibliographic Details
Main Authors MICHAEL EDWARD CATON, NIGEL JULIAN WALKER, EMMA KNOWLES
Format Patent
LanguageEnglish
Published 27.11.2013
Subjects
ADHESIVES
CHEMISTRY
DYES
FIRE-FIGHTING
HUMAN NECESSITIES
LIFE-SAVING
MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE
METALLURGY
MISCELLANEOUS APPLICATIONS OF MATERIALS
MISCELLANEOUS COMPOSITIONS
NATURAL RESINS
PAINTS
POLISHES
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Summary:An electrically conductive intumescent sheet material which may have a thickness of 0.25 to 5 mm, a density of 100 to 500 kg m3, a volume expansion ratio of from 3:1 to 20:1 after 15 minutes at 450°C, a surface resistivity value of from 105 to 2 ohms/square, and/or an insertion loss value of at least 10 dB when measured at a frequency of 10 GHz. The material may comprise an inorganic fibre matrix and further comprise an intumescent substance and an electrically conductive substance. The material may be produced by preparing an aqueous suspension of inorganic vitreous fibres, an intumescent substance, an electrically conductive substance and optionally a binder, wet-laying the slurry on to a water pervious support, withdrawing the water from the slurry to produce a sheet and drying the sheet. The material is useful in remotely activated fire protection systems.
Bibliography:Application Number: GB20110016696