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    Delustered superpolyamide articles and process of making same
    24.
    发明授权
    Delustered superpolyamide articles and process of making same 失效

    公开(公告)号：US2671770A

    公开(公告)日：1954-03-09

    申请号：US28067252

    申请日：1952-04-04

    Applicant: RHODIACETA

    Inventor： JEAN CHEZAUD

    IPC: C08K3/00 ,  D01F1/04 ,  D01F1/10 ,  D01F6/60 ,  D06M11/13 ,  D06M11/26 ,  D06M13/503 ,  D06P3/24 ,  D06P3/26

    CPC classification number: D06P3/26 ,  C08K3/10 ,  D01F1/04 ,  D01F1/10 ,  D01F6/60 ,  D06M11/13 ,  D06M11/26 ,  D06M13/503 ,  D06P3/241 ,  Y10S8/21 ,  C08L77/00

    Abstract: Artificial filaments, films, ribbons, tubes, rods and other articles, and coatings, of dull appearance and having a high resistance to the degrading action of actinic rays, are made from a polyamide in which have been incorporated 0.5-5 per cent. of a delustring agent and also small proportions of both manganese and copper compounds. Alternatively the manganese and copper compounds may be incorporated in formed articles of a polyamide containing the delustring agent. The manganese and copper compounds may be hydroxides or salts of weak acids. They may be incorporated in the starting materials or intermediate products used for making the polyamides, or they may be added to the molten polyamide or to a solution of the polyamide. Filaments may be made by melt spinning or by dry or wet spinning of the polymer solutions. If desired the impregnation with manganese and copper compounds may be effected on manufactured articles such as fabrics, felts and knitted goods. Preferably the proportion of manganese incorporated lies between 0.001 and 0.04 per cent., and that of the copper lies between 0.001 and 0.01 per cent. of the weight of the polyamide. The polyamide may be formed from a diamine and a dibasic acid, or from an o -aminocarboxylic acid or the lactam of such acid. In an example, filaments are obtained from polyhexamethylene adipamide containing 3 per cent. of titanium dioxide, 0.03 per cent. of manganese lactate hydrate and 0.008 per cent. of copper acetate. In another example, a skein of filaments of a polyamide obtained from caprolactam and containing 3 per cent. of titanium dioxide is immersed in a solution containing water, formic acid and small proportions of manganese lactate and copper acetate. The skein is withdrawn, washed and dried. Specification 689,629 is referred to.ALSO:Filaments, threads, fabrics, felts and other textile materials and articles made from delustred polyamides containing 0.5-5 per cent of a delustring agent are rendered resistant to the colouring and deteriorating action of actinic light by impregnating them with a solution containing both copper and manganese compounds. Preferably the solution contains a swelling agent for the polyamide, e.g. formic acid. The textile materials treated may contain, in addition to the polyamide filaments, also filaments or fibres of cotton, linen, silk, rayon or synthetic materials such as polyesters or polyvinyl derivatives. The manganese and copper compounds may be hydroxides or salts of weak acids. Preferably the proportion of manganese incorporated lies between 0.001 and 0.04 per cent by weight based on the weight of the polymer, and the proportion of copper preferably lies between 0.001 and 0.01 per cent. In an example, a skein of filaments of a polyamide obtained from caprolactam and containing 3 per cent of titanium dioxide is immersed in a solution containing water, formic acid and small proportions of manganese lactate and copper acetate. The skein is withdrawn, washed and dried. Specification 689,629, [Group IV(a)], is referred to.

    Solutions of copolymers containing amide and imide groups and process for their preparation
    28.
    发明授权
    Solutions of copolymers containing amide and imide groups and process for their preparation 失效
    含有酰胺和酰亚胺基团的共聚物溶液及其制备方法

    公开(公告)号：US3929691A

    公开(公告)日：1975-12-30

    申请号：US88891369

    申请日：1969-12-29

    Applicant: RHODIACETA

    Inventor： ALLARD PIERRE

    IPC: C08G18/00 ,  C08G18/34 ,  C08G73/14

    CPC classification number: C08G73/14 ,  C08G18/343

    Abstract: The invention provides wet- or dry-spinnable solutions of high molecular weight polyamide-polyimide copolymers derived from an aromatic diisocyanate, an aromatic or heterocyclic diacid, an aromatic anhydride acid and, optionally, an aromatic dianhydride, in polar solvents such as N-methylpyrrolidone.

    Abstract translation: 本发明提供在极性溶剂如N-甲基吡咯烷酮中衍生自芳族二异氰酸酯，芳族或杂环二酸，芳族酸酐和任选的芳族二酐的高分子量聚酰胺 - 聚酰亚胺共聚物的湿 - 或干 - 可纺丝溶液 。

    Process for the production of orientated synthetic filaments
    29.
    发明授权
    Process for the production of orientated synthetic filaments 失效
    用于生产定向合成膜的方法

    公开(公告)号：US3840633A

    公开(公告)日：1974-10-08

    申请号：US14501971

    申请日：1971-05-19

    Applicant: RHODIACETA

    Inventor： LEQUAY C ,  BARBE G ,  CURTILLAT P

    IPC: D01D5/12 ,  D01F6/62 ,  D02J1/22 ,  D01F3/10

    CPC classification number: D02J1/228 ,  D01D5/16 ,  D01D10/00 ,  D01F6/60 ,  D01F6/62

    Abstract: 1. A PROCESS FOR THE PRODUCTION OF ORIENTED CONTINUOUS FILAMENTS OF POLYESTTERS OR POLYAMIDES OF FIBER-FORMING MOLECULAR WEIGHT BY SPINNING THE POLYMER AND ORIENTING THE RESULTING FILAMENT BY STRETCHING IN WHICH THE SPINNING AND STRETCHING ARE CARRIED OUT AS A SINGLE CONTINUOUS PROCESS, WHICH COMPRISES AS A SERIES OF SUCCESSIVE STEPS, ONE FOLLOWING IMMEDIATELY ON ONE ANOTHER IN THE FOLLOWING ORDER: (A) EXTRUDING AS CONTINUOUS FILAMENTS THE MOLTEN POLYMER INTO AN ATMOSPHERE AT SUBSTANTIALLY THE AMBIENT TEMPERATURE; (B) COOLING THE FILAMENTS SO FORMED DIRECTLY TO A TEMPERATURE T1 BETWEEN 55* AND 130*C. WHICH IS (I) ABOVE 55*C., (II) AT LEAST 5*C. ABOVE THE SECOND ORDER TRANSITION TEMPERATURE OF THE POLYMER, AND (III) NOT HIGHER THAN THE MAXIMUM TEMPERATURE AT WHICH STRETCHING FILAMENTS OF THE POLYMER ORIENTS THEM; (C) POSITIVELY FORWARDING THE FILAMENTS WHEN THEY HAVE REACHED THE SAID TEMPERATURE T1 AT A SPEED V1 HIGHER THAN THE EXTTRUSION SPEED, WHEREBY THE FRESHLY EXTRUDED FILAMENTS ARE ATTENUATED WITHOUT BEING SUBSTANTIALLY ORIENTED;

    (D) COOLING THE FILAMENTS FURTHER TO A TEMPERATURE T2 BELOW 75*C. WHICH IS ALSO BETWEEN T1 AND THE AMBIENT TEMPERATURE, BY CAUSING THEM TO CONTINUE TO TRAVEL THROUGH AN ATMOSPHERE AT THE AMBIENT TEMPERATURE; AND (E) POSITIVELY FORWARDING THE FILAMENTS WHILE THEY ARE AT THE SAID TEMPERATURE T2 AT A SPEED V2 WHICH IS GREATER THAN V, THE RATIO V2/V1 BEING FROM 3:1 TO 6:1, WHEREBY THE FILAMENTS SO PRODUCED ARE ORIENTED.

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