Fire resistant cellulosic materials
AssigneeAstaris LLC
InventorsRose P. Arshinova, Edward J. Griffith
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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.
Claims11
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 metal oxide additives, 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.
A cellulosic material on which is deposited aluminum phosphate and (optionally a metal phosphate) which has been cured to form a condensed phosphate and wherein the chain length (n) ranges from about 10 to about 10,000.
The cellulosic material of claim 8 wherein said (n) ranges from about 20 to about 100.
Dependencies are inferred from the claim text.