The instant invention relates to a composition useful as a precursor for imparting flame-retardant properties to textile articles, comprising a condensate of: (a) a tetrakis (hydroxyorgano) phosphonium sulfate THPS; (b) urea, or alternatively thiourea; (c) optionally, and preferably, an aliphatic hydroxyl-reactive compound, such an amine wherein said composition has a very low free formaldehyde content, namely of less than 0.1%.

A flame retardant fabric wherein a flame retardant composition is applied to the fabric while the fabric is being stretched. Preferably, the fabric is a blend of cotton and a thermoset. Carbon fibers may be included to impart anti-static properties. The present invention includes a method of treating a woven or knitted fabric of cotton blended with a thermoset, or with a thermoplastic, or with both with a flame retardant composition comprising the steps of stretching the fabric up to 12% greater than its un-stretched dimensions and, while so stretched, applying a flame retardant to the fabric and then allowing the fabric to shrink back to its approximate original dimensions. The flame retardant may either be applied to the fabric or the fabric may be immersed in an aqueous bath containing flame retardants.

A flame retardant fabric wherein a flame retardant composition is applied to the fabric while the fabric is being stretched. Preferably, the fabric is a blend of cotton and a thermoset. Carbon fibers may be included to impart anti-static properties. The present invention includes a method of treating a woven or knitted fabric of cotton blended with a thermoset, or with a thermoplastic, or with both with a flame retardant composition comprising the steps of stretching the fabric up to 12% greater than its un-stretched dimensions and, while so stretched, applying a flame retardant to the fabric and then allowing the fabric to shrink back to its approximate original dimensions. The flame retardant may either be applied to the fabric or the fabric may be immersed in an aqueous bath containing flame retardants.

The instant invention relates to a textile article comprising a flame-retardant treated fabric including an oxidized polymer obtained from an ammonia curing of a condensate of (i) a tetrakis (hydroxyorgano) phosphonium salt; and (ii) urea or thiourea; followed by an oxidation into phosphine oxide groups of at least one part of the phosphonium groups present on the cured condensate, wherein said flame-retardant treated fabric: is intended to be used as a stable substrate in which the formation of formaldehyde over the time is inhibited; and contains less than 1% by weight of phosphorus present in phosphonium groups, based on the total weight of the flame-retardant treated fabric.

The instant invention relates to a textile article comprising a flame-retardant treated fabric including an oxidized polymer obtained from an ammonia curing of a condensate of (i) a tetrakis (hydroxyorgano) phosphonium salt; and (ii) urea or thiourea; followed by an oxidation into phosphine oxide groups of at least one part of the phosphonium groups present on the cured condensate, wherein said flame-retardant treated fabric: is intended to be used as a stable substrate in which the formation of formaldehyde over the time is inhibited; and contains less than 1% by weight of phosphorus present in phosphonium groups, based on the total weight of the flame-retardant treated fabric.

A flame resistant textile is provided. The textile is a sateen weave fabric containing cellulosic fibers, where the sateen weave fabric has a thickness of at least 19.5 mils, a thickness of at least 25 mils after 3 home washes at 120? F., an air permeability of at least 60 cfm, and a weight of less than about 7 oz/yd.sup.2. The sateen weave fabric also contains a treatment, where the treatment contains a tetramethylhydroxy phosphonium salt or its condensate and chemical selected from the group consisting of urea, guanidines, guanyl urea, glycoluril, and polyamines. When the sateen weave fabric to which the treatment has been applied has been heat-cured and oxidized at least a portion of the cellulosic fibers have a pentavalent phosphate compound polymerized therein. The method for producing the flame resistant textile is also provided.

A flame resistant textile is provided. The textile is a sateen weave fabric containing cellulosic fibers, where the sateen weave fabric has a thickness of at least 19.5 mils, a thickness of at least 25 mils after 3 home washes at 120? F., an air permeability of at least 60 cfm, and a weight of less than about 7 oz/yd.sup.2. The sateen weave fabric also contains a treatment, where the treatment contains a tetramethylhydroxy phosphonium salt or its condensate and chemical selected from the group consisting of urea, guanidines, guanyl urea, glycoluril, and polyamines. When the sateen weave fabric to which the treatment has been applied has been heat-cured and oxidized at least a portion of the cellulosic fibers have a pentavalent phosphate compound polymerized therein. The method for producing the flame resistant textile is also provided.

The present disclosure relates to a flame retardant (FR) treated fabric, comprising yarns formed from a mixture of natural and/or synthetic fibres, the fabric further comprising FR treated lyocell fibres, wherein the FR treatment is a non-cellulose-reactive FR treatment and the FR treated lyocell fibres are rendered low-fibrillating e.g. whereby at least some of the hydroxyl groups are cross-linked with a reactant resin.

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.

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.