Aquerous urea for fire control
OwnerDavid H. Blountinventor
Life of this patent
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Abstract
Aqueous urea and/or aqueous urea condensate and/or aqueous urea composition may be utilized to fight grass, forest, building, and other flammable organic material by applying it to these flammable organic materials. The aqueous urea and/or aqueous urea condensate and/or aqueous composition may also be incorporated into flammable materials such as solid and foam plastic and natural materials. Aqueous urea composition are produced by adding and mixing carbon auxiliaries, such as phosphorus containing compounds, metal containing compounds that will accelerate carbonization, heat reflector, surfactant and fillers to the aqueous urea.
Claims1
A flame retardant polyurethane foam produced by the process consisting essentially of mixing and reacting, optionally with added heat, the following component:
- a) 25 to 100 part by weight of aqueous urea;
- b) 0.5 to 100 parts by weight of silicon surfactant;
- c) 0.25 to 100 parts by weight of urethane catalyst;
- and
- d) 25 to 100 parts by weight of polyisocyanate;
- with the proviso that the concentration of urea in the final polyurethane foam is sufficient to render said polyurethane foam flame retardant.
Dependencies are inferred from the claim text.