Fire resistant cellulosic materials and rendering such cellulosic materials leach resistant
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United States of America Patent
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May 22, 2001
Grant Date -
N/A
app pub date -
Apr 24, 1998
filing date -
Apr 25, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A process for preparing a fire-resistant cellulosic material which comprises contacting cellulosic material with an aqueous solution of aluminum phosphate wherein the molar ratio of aluminum to phosphorous is less than 1:1, optionally containing a metal oxide, to form an initially treated cellulosic material containing aluminum phosphate and an increased amount of water, removing water from and curing said initially treated cellulosic material to form a fire-resistant cellulosic material. The cellulosic material is preferably wood and the wood is preferably a shingle or plywood.
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