Flame retardant precursors, polymers prepared from such precursors, and flame resistant fabrics treated with such polymers
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United States of America Patent
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May 29, 2018
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app pub date -
Oct 22, 2014
filing date -
Oct 25, 2013
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Abstract
A composition comprises at least one condensed phosphorus compound. The condensed phosphorus compound is produced by reacting together in a condensation reaction a nitrogen compound and a phosphonium compound. A phosphorus-containing polymer is produced by reacting in a condensation reaction a hydroxyalkylphosphonium compound to produce an intermediate polymer and then oxidizing phosphorus atoms in the intermediate polymer to yield a polymer comprising phosphine oxide groups.
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