Manufacture of flame-retardant regenerated cellulose fibres

Details Manufacture of flame-retardant regenerated cellulose fibres Manufacture of flame-retardant regenerated cellulose fibres

D - Textiles, Paper

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18/593

D01F 2/08 (2006.01) C08K 3/32 (2006.01) C08K 5/00 (2006.01) D01F 2/10 (2006.01) D01F 11/02 (2006.01) D06M 11/68 (2006.01) D06M 11/70 (2006.01) D06M 13/285 (2006.01) D06M 13/292 (2006.01) D06M 15/431 (2006.01) D06M 15/432 (2006.01) D06M 15/673 (2006.01)

Patent

CA 1089613

ABSTRACT OF THE DISCLOSURE Manufacture of flame-retardant regenerated cellulose fibres by adding flame-retardant phosphorus compounds to viscose, extruding the vis- cose-containing mixture thus obtained into a spinning bath, stretching and after-treating the resulting filaments or staple fibres. The flame-retardant fibres are made by using as the flame-retardant agent a combination of com- pounds of the general formula: PNxOy in which x stands for a number 0.09 and 1.7 and y stands for a number between 1.2 and 0, preferably approaching zero as the values of x increase towards 1.7 (component A), with compounds which are selected from phosphoric acid alkylesters, preferably halogen-containing phosphoric acid alkylesters; cyclophosphazenes, polyphosphazenes; tetrakis-(hydroxymethyl)-phosphonium chloride or hydroxide or its condensation products with ammonia, oxymethyl- amine, urea or other amines or amides, vinyl compounds containing halogen, phosphonitrogen or phosphorus; and tris-(l-aziridinyl)-phosphine oxide or N-(hydroxymethyl)-3-phosphonopropionamide, if desired in further combination with a condensation resin (component B).

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