Flame retardant compositions and method of use
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United States of America Patent
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Jun 30, 1992
Grant Date -
N/A
app pub date -
Mar 1, 1991
filing date -
Mar 1, 1990
priority date (Note) -
Expired
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Abstract
A flame retardant composition comprises at least one cyclic phosphonate ester and at least one phosphono amide. The ester and the amide are present in a ratio by weight of 0.1 to 2:1. A co-curing agent (e.g. urea, ethylene urea or an amino-triazine) may be included. The composition may also contain a non-rewetting agent and/or a softening or conditioning agent. The composition is used for the flame retardant treatment of a fabric by first impregnating the fabric with an aqueous solution of the composition and then heating the impregnated fabric at at least 100.degree. C. and under acid pH conditions.
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