Addition of reaction product of tetrakishydroxy methyl...

Details Addition of reaction product of tetrakishydroxy methyl... Addition of reaction product of tetrakishydroxy methyl...

D - Textiles, Paper

01

F

18/593

D01F 2/06 (2006.01) C07F 9/54 (2006.01) D01F 2/10 (2006.01)

Patent

CA 1080417

ABSTRACT OF THE DISCLOSURE A method is disclosed for producing cellulosic and/or polynosic fibres having flame-resisting properties, the improve- ment consisting in the fact that a composite viscose is spun in an acidic bath, said composite viscose being obtained by the association in an aqueous solvent, of cellulose xanthate with a phosphorus and nitrogen compound, dissolved in the same aqueous solvent and capable of being converted, while cellulose is being regenerated in said acidic bath, into a state of substantial insolubility. The phosphorus and nitrogen compound is a compound obtained by reacting a phosphonium derivative with aminoacids and amines and/or ammonia. A preferred compound is tetrakis-hydroxy- methylphosphonium chloride. By so doing, an efficient flame- retarding protection is obtained for the fibre without sacrificing the physical properties thereof. Critical quantities, reaction conditions and test results are reported.

184380

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