Intumescent material
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United States of America Patent
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Aug 14, 2001
Grant Date -
N/A
app pub date -
Apr 1, 1999
filing date -
Apr 2, 1998
priority date (Note) -
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Abstract
A flexible intumescent material which comprises inorganic fibers and flexible organic fibers together forming a predominantly fibrous matrix, an elastomeric binder and an intumescent substance and which has been compressed at a moisture content of less than 5% by weight. The intumescent material may be produced by wet laying an aqueous slurry of inorganic fibers, flexible organic fibers, the intumescent substance and the elastomeric binder onto a water-pervious support, withdrawing water from the slurry to form a sheet, drying the sheet to a moisture content of less then 5% by weight and then compressing the sheet material.
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