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    FIBRE FROM ACRYLONITRILE COPOLYMERS HAVING REDUCED INFLAMMABILITY,COMPOSITIONS AND PROCESSES FOR MANUFACTURING THE SAME
    3.
    发明专利
    FIBRE FROM ACRYLONITRILE COPOLYMERS HAVING REDUCED INFLAMMABILITY,COMPOSITIONS AND PROCESSES FOR MANUFACTURING THE SAME 未知

    公开(公告)号：ZA785873B

    公开(公告)日：1979-09-26

    申请号：ZA785873

    申请日：1978-10-18

    Applicant: SNIA VISCOSA

    Inventor： CAVALLARO A ,  MATERA C ,  CAZZARO G ,  MALGERI D

    IPC: D01F6/40 ,  D06M15/285 ,  D06M15/31 ,  C07C ,  C08F

    Abstract: Textile fibers having reduced inflammability and high luster, constituted by copolymers of acrylonitrile, vinylidene chloride and a significantly homopolymerizable sulphonic comonomer are described. Significantly homopolymerizable comonomers are defined as monomers which homopolymerize with a conversion above 30 DEG -40 DEG under standard conditions set forth in the specification. A preferred class of such comonomers are the derivatives of acrylamidoalkanesulphonic acids, e.g. 2-acrylamido-2-methylpropane-sodium sulphonate. The fibers are spun from spinning dopes containing said copolymers in solution in organic solvent miscible with water and less than 4% of water. Said spinning dopes can be obtained by preparing a binary copolymer of acrylonitrile and the sulphonic monomer, in solution in the solvent, mixing the solution with a solution of acrylonitrile and vinylidene monomers in the same solvent, and subjecting the mixture to copolymerization. The copolymers finally obtained contain 50-85% of acrylonitrile, 13.5-46.5% of vinylidene chloride, and 1.5-3.5% of the sulphonic comonomer, the percentages being by weight.

    MODACRILIC FIBRE HAVING HIGH RETRACTION AND REDUCED INFLAMMABILITY AND PROCESS FOR ITS MANUFACTURE
    6.
    发明专利
    MODACRILIC FIBRE HAVING HIGH RETRACTION AND REDUCED INFLAMMABILITY AND PROCESS FOR ITS MANUFACTURE 未知

    公开(公告)号：ZA782669B

    公开(公告)日：1979-05-30

    申请号：ZA782669

    申请日：1978-05-10

    Applicant: SNIA VISCOSA

    Inventor： CAZZARO G ,  MALGERI D ,  MATERA G ,  CAVALLARO A

    IPC: D01F6/40 ,  C07C121/00

    Abstract: Modacrylic fibers having high retraction, reduced inflammability and high glossiness, prepared by wet spinning a solution, in an organic spinning solvent miscible with water, of a mixture of copolymers from acrylonitrile, vinylidene chloride, at least a vinyl ester and at least an unsaturated monomer containing at least a sulphonic group, the acrylonitrile units being from 50% to 85% by weight and the vinyl ester units from 3% to 6% by weight; hot drawing the coagulated fiber in a mixture of water and spinning solvent; drying the fiber in hot air while leaving it free concurrently to contract; and subsequently further hot drawing it in air.

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