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    26.
    发明专利
    未知

    公开(公告)号：BR7308425D0

    公开(公告)日：1974-09-10

    申请号：BR842573

    申请日：1973-10-26

    Applicant: SNIA VISCOSA

    Inventor： ROSSI P ,  SICLARI F

    IPC: C08L1/00 ,  C07F9/54 ,  D01F2/08 ,  D01F2/10 ,  D06M13/30 ,  D06M13/40 ,  D01F3/12

    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.

    27.
    发明专利
    未知

    公开(公告)号：IT956245B

    公开(公告)日：1973-10-10

    申请号：IT2364372

    申请日：1972-04-27

    Applicant: SNIA VISCOSA

    Inventor： SICLARI F ,  ALO B ,  BIGGIO A

    IPC: C08G63/688 ,  C08K5/42 ,  D01F

    Abstract: Polyesters esp. PET are obtd. by copolymerising a bior oxycarboxylic acid, or their ester-forming deriv., and an aliphatic glycol with an aromatic cpd. of general formula: (where m and n are each 1 or 2, Ar is an aromatic e.g. phenylene and naphthylene substd. by sulphonic gp(s). and M is H or alkali(ne earth) metal). The colours obtd. are brilliant and have outstanding fastness to washings.

    28.
    发明专利
    未知

    公开(公告)号：BE764751A

    公开(公告)日：1971-08-16

    申请号：BE764751

    申请日：1971-03-24

    Applicant: SNIA VISCOSA

    Inventor： SICLARI F ,  MAGNONI F ,  BIANUCCI G

    IPC: B23K26/14 ,  D01G1/02 ,  D01G

    Abstract: 1312188 Stapling fibres SNIA VISCOSA SOC NAZIONALE INDUSTRIA APPLICAZIONI VISCOSA 19 April 1971 [26 March 1970] 25364/71 Heading D1F In a method of continuously cutting a flattened tow of continuous filaments into staple fibres, the tow is fed at constant speed past a station whereat the filaments are thermally sheared by a pulsed laser beam. The latter is focussed to provide a rectangular beam having in the plane of the cutting station a crosssection with a major side greater than the width of the tow and a minor side of a few microns. The time interval between successive pulses of the beam corresponds to the time taken to advance the tow by an amount equal to a predtermined fibre length and the pulse duration is less than one thousandth of a second. The laser has a wavelength corresponding to that of a main absorption band of the material, e.g. nylon or polyester, of the filaments. As shown, a tow 18 is fed between counter-rotating, endless chain tracks 20 and 22, in the form of metal or non-metallic bands, guided by pulleys 24, 26 and 28, 30, at least one of each pair of which is driven. Track 20 is formed with rectangular windows 32 spaced uniformly therealong at intervals equal to the highest common factor of all the lengths of staple fibre into which the filaments may be required to be cut. A laser beam pulse 14, emanating from a generator 10, which may cooperate with interruptor means, e.g. an apertured rotating disc (not shown) and emerging through a window 12, passes through aligned windows 32 to sever the tow. Slit nozzles 36, 38, emit jets of inert gas, such as compressed nitrogen, against the tow above and below the zone where the laser strikes, to ensure immediate dispersal of heat and to prevent oxidation. Excess laser beam energy may be absorbed by track section 22 or this may also comprise windows (not shown) through which the laser passes to a cooled screen.

    30.
    发明专利
    未知

    公开(公告)号：IT1033134B

    公开(公告)日：1979-07-10

    申请号：IT2059075

    申请日：1975-02-25

    Applicant: SNIA VISCOSA

    Inventor： SICLARI F ,  ROSSI P P ,  GAETANO DE M

    IPC: C07B61/00 ,  B01J23/00 ,  C07B31/00 ,  C07C67/00 ,  C07C227/00 ,  C07C227/06 ,  C07C227/08 ,  C07C227/10 ,  C07C229/08 ,  C07C

    Abstract: The specification describes a process for preparing saturated omega-aminoacids from olefinically unsaturated omega-aldehydoacids. According to the invention, the starting aldehydoacid is transformed into the corresponding iminoacid, and this is subjected to the hydrogenation both of the imino function and of the ethylenic double bond or double bonds, in a single stage and in the presence of an hydrogenation catalyst. The catalyst is a transition metal of one of the first two sub-groups of the VIII group of the periodic system, viz. is chosen among Fe, Ru, Os, Co, Rh, and Ir, and is used in the metal state or as a compound.

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