Flame Retardant Composition for Cotton Articles
AssigneeHuntsman Textile Effects (Germany) GmbH
InventorsSalman Dermeik, Andreas Eisele, Waltraud Demharter
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Abstract
Compositions useful for the flame retardant finishing of cotton articles or other cellulose materials are described. The compositions are obtainable by reacting a tetrakishydroxyalkylphosphonium (THP) salt with caprolactam and urea to form a condensation product and subsequently forming a condensate from excess THP salt and excess urea. The compositions endow cotton articles with flame retardant properties and a pleasantly soft hand coupled with good durability to laundering processes.
Claims9
A composition for the flame retardant finishing of fiber materials, which is obtained by adding caprolactam to a mixture of water and a tetrakishydroxyalkylphosphonium (THP) salt, at an amount from 0.03 to 0.9 mol of caprolactam per mol of tetrakishydroxyalkylphosphonium cations (THP ions), subsequently maintaining the mixture at about 100° C. until essentially no free caprolactam is present any longer, and then optionally adding urea to the mixture and maintaining the mixture at a temperature of about 105° C. for at least 10 minutes, the amount of urea added being in the range from 0 to 0.7 mol per mol of THP ions originally used.
6-9. (canceled)
Dependencies are inferred from the claim text.