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19 records (took 0.019 seconds)

    16.
    发明专利
    未知

    公开(公告)号：DE2631518A1

    公开(公告)日：1977-01-20

    申请号：DE2631518

    申请日：1976-07-10

    Applicant: SNIA VISCOSA

    Inventor： SICLARI FRANCESCO ,  ROSSI PIETRO PAOLO ,  LEONI ROBERTO ,  GAETANO MARIO DE

    IPC: D01F2/08 ,  C08L1/06 ,  D01F2/10 ,  D01F1/10

    Abstract: There is described the preparation of a flameproofing compound useful in the production of cellulosic fibres having a high resistance to combustion, said preparation comprising treating a phosphonitrile halide with a saturated alcohol, treating the halogen containing alkoxy derivative thus obtained with an unsaturated alcohol, and copolymerizing the alkyl substituted alkoxy derivative product thus obtained with an unsaturated acid, forming an alkaline aqueous solution-suspension adapted to be easily and intimately mixed with alkaline aqueous solutions of cellulose xantogenate to obtain a viscous mass of cospinnable components which are co-coagulable in a cellulose xantogenate coagulating bath. Obtaining essentially homogeneous yarns including the flameproofing compound in their cross-sections.

    17.
    发明专利
    未知

    公开(公告)号：DE2353821A1

    公开(公告)日：1974-05-09

    申请号：DE2353821

    申请日：1973-10-26

    Applicant: SNIA VISCOSA

    Inventor： ROSSI PIETRO PAOLO ,  SICLARI FRANCESCO

    IPC: C08L1/00 ,  C07F9/54 ,  D01F2/08 ,  D01F2/10 ,  D01F3/10

    Abstract: A method is disclosed for producing cellulosic and/or polynosic fibres having flame-resisting properties, the improvement 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-hydroxymethylphosphonium 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.

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