Treatment of textile materials

D - Textiles – Paper – 06 – M

Patent

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Details

D06M 11/60 (2006.01) C07F 9/6584 (2006.01) D06M 13/285 (2006.01) D06M 15/431 (2006.01)

Patent

CA 2745053

The present invention provides a method for treating textile material to confer flame retardant properties, the method comprising the steps of impregnating the material with an aqueous solution of a treatment agent which is a poly (hydroxyorgano) phosphonium compound; drying the impregnated material; curing the dried impregnated material with ammonia to produce a cured, water-insoluble polymer which is mechanically fixed within the fibres of the material; oxidising the cured polymer to convert trivalent phosphorus to pentavalent phosphorus; and washing and drying the material; wherein one or both of steps (d) and (e) result in the co-production of an aqueous effluent; and wherein the conditions are controlled such that the atomic ratio of N:P present on the material increases during step (c) by 0.8 or more.

La présente invention porte sur un procédé de traitement d'un matériau textile afin de lui conférer des propriétés ignifuges, le procédé consistant à imprégner le matériau dune solution aqueuse constituée dun agent de traitement qui est un composé de poly(hydroxyorgano)phosphonium ; sécher le matériau imprégné ; traiter le matériau imprégné séché avec de l'ammoniac afin de produire un polymère traité insoluble dans l'eau qui soit mécaniquement fixé à l'intérieur des fibres du matériau ; oxyder le polymère traité afin de convertir le phosphore trivalent en phosphore pentavalent ; et laver et sécher le matériau ; dans lequel procédé l'une ou les deux étapes (d) et (e) entraînent la coproduction d'un effluent aqueux ; et dans lequel procédé les conditions sont maîtrisées de telle sorte que le rapport atomique N:P présent sur le matériau augmente l'étape durant (c) de 0,8 ou plus.

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