Fire-retardant, method for manufacturing fire-retardant cellulose-based
OwnerThomas Lallyinventor
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Abstract
The present invention imparts fire-retardancy upon cellulosic products utilizing a cost-effective, non-toxic, and reliable process. Unlike previous methods which impart superficial fire-retardant coatings upon finished products, the present process treats the individual cellulosic particles (i.e. fibers, chips etc.) that make up cellulose-based particle products. Treating the individual particles provides fire-retardancy throughout the entire length and width of the product. This full-depth retardancy provides superior protection, especially in catastrophic fires where the surface coat of other products can be compromised.
Claims20
Method for imparting fire-retardancy upon cellulosic materials comprising:
- a. mixing a cellulosic material, an aqueous solution, and a potassium phosphate forming a phosphate-cellulose slurry;
- b. after formation of the phosphate-cellulose slurry, mixing a metal oxide composition with the phosphate-cellulose slurry forming a phosphate-oxide-cellulose slurry containing treated cellulosic material;
- c. separating or removing the treated cellulose material from the rest of phosphate-oxide-cellulose slurry.
Method for imparting fire-retardancy upon materials comprising:
- a. Mixing a cellulose material with a first aqueous solution forming a first cellulose slurry, wherein the first cellulose slurry is at least about 75 weight percent water;
- b. Holding the first cellulose slurry to allow absorption;
- c. Removing the cellulose material from the first cellulose slurry;
- d. Mixing the removed cellulose-based material with a second aqueous solution forming a second cellulose slurry containing treated cellulose material;
- e. Holding the second cellulose slurry to allow absorption,
- d. Removing the treated cellulose material from the second cellulose slurry.
Dependencies are inferred from the claim text.