Method for the preparation of aqueous fire retarding concentrates
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United States of America Patent
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Nov 20, 1990
Issued Date -
N/A
app pub date -
Dec 22, 1988
filing date -
Jan 30, 1987
priority date (Note) -
Expired
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Abstract
The present invention is directed to an aqueous concentrate adapted to be diluted with water and used in fire control. The concentrate exhibits a viscosity of less than about 2000 centipoise and containing between about 0.75% and about 6% by weight a thickening agent and at least about 24% by weight of certain fire retardants, particularly diammonium phosphate, diammonium sulfate, a blend of diammonium phosphate and diammonium sulfate, a blend of monoammonium phosphate and diammonium phosphate having a nitrogen to phosphorus ratio of at least about 1.25, and a blend of monoammonium phosphate, diammonium sulfate and diammonium phosphate having a nitrogen to phosphorus ratio of at least about 1.25. Processes for the preparation of such concentrates and for use thereof are also disclosed.
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