Corrosion-inhibited ammonium polyphosphate fire retardant compositions
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United States of America Patent
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Jun 19, 2012
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app pub date -
Oct 31, 2006
filing date -
Oct 31, 2006
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Abstract
A fire-retardant composition comprising an ammonium polyphosphate, a suspending agent and an effective amount of a corrosion inhibiting agent. When in solution the corrosion inhibiting agent includes at least one ion selected from the group of ions consisting of aluminum ions, ferric ions, calcium ions and magnesium ions. Said ions complex an effective amount of fluoride ions present in the fire-retardant composition to reduce the corrosiveness of the fire-retardant composition.
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