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16 条记录 (耗时 0.018 秒)

    Flame-retardant, high temperature resistant polyimide fibers and process for producing the same
    1.
    发明授权
    Flame-retardant, high temperature resistant polyimide fibers and process for producing the same 失效
    阻燃耐高温聚酰亚胺纤维及其制造方法

    公开(公告)号：US5384390A

    公开(公告)日：1995-01-24

    申请号：US763807

    申请日：1991-09-23

    申请人： Claus Schobesberger ,  Klaus Weinrotter ,  Herbert Griesser ,  Sigrid Seidl

    发明人： Claus Schobesberger ,  Klaus Weinrotter ,  Herbert Griesser ,  Sigrid Seidl

    IPC分类号： D01F1/10 ,  D01F6/74 ,  C08G73/10 ,  D01F6/00

    CPC分类号： D01F6/74 ,  Y10T428/2904 ,  Y10T428/2913 ,  Y10T428/2922 ,  Y10T428/2973

    摘要： There are disclosed flame-retardant, high temperature resistant polyimide fibers of the general formula ##STR1## wherein n is an integer larger than 1, A is a tetravalent aromatic group and R is at least one divalent aromatic group. These polyimide fibers have been heat-treated in the unstretched state and have a maximum shrinkage of 14% when heated to a temperature of 400.degree. C. These polyimide fibers are produced by initially spinning crude fibers from a solution of the appropriate polyimide in an aprotic organic solvent, preferably according to the dry-spinning method, which solution optionally contains additives. The crude fibers obtained are washed with water to remove the solvent. The washed crude fibers are dried to a moisture content of less than 5% by mass, are subjected to a heat treatment at a temperature of between 315.degree. C and 450.degree. C, are cooled and, if desired, are crimped and cut to staple fibers. What is essential is that the heated crude fibers are heat-treated and cooled in the unstretched state.

    摘要翻译： 公开了通式（I）的阻燃耐高温聚酰亚胺纤维，其中n是大于1的整数，A是四价芳族基团，R是至少一个二价芳族基团。 这些聚酰亚胺纤维在未拉伸状态下进行了热处理，当加热到400℃时，其最大收缩率为14％。这些聚酰亚胺纤维是通过将粗纤维从合适的聚酰亚胺溶液中的非质子传递 有机溶剂，优选根据干纺法，该溶液任选地含有添加剂。 将所得粗纤维用水洗涤以除去溶剂。 将洗过的粗纤维干燥至水分含量小于5质量％，在315℃至450℃的温度下进行热处理，冷却，如果需要，将其卷曲并切割成订书钉 纤维。 重要的是加热的粗纤维在未拉伸状态下进行热处理和冷却。

    Method of producing new flame-retardant thermostable homopolyimides, these homopolyimides, a moulded article obtained therefrom and a fibre prouced from these homopolyimides
    2.
    发明授权
    Method of producing new flame-retardant thermostable homopolyimides, these homopolyimides, a moulded article obtained therefrom and a fibre prouced from these homopolyimides 失效
    生产新的阻燃可热稳定的共聚单体的方法，这些共聚物，由其获得的模制品和由这些共聚物制备的纤维

    公开(公告)号：US5120814A

    公开(公告)日：1992-06-09

    申请号：US473305

    申请日：1990-01-31

    申请人： Sigrid Seidl ,  Klaus Weinrotter ,  Herbert Griesser

    发明人： Sigrid Seidl ,  Klaus Weinrotter ,  Herbert Griesser

    IPC分类号： B29C43/02 ,  B29K79/00 ,  C08G18/34 ,  C08G73/10 ,  D01F6/74

    CPC分类号： C08G73/1067

    摘要： To produce flame-retardant thermostable new homopolyimides having structural units of the general formula ##STR1## by reacting 3,3',4,4'-benzophenone tetracarboxylic acid dianhydride with an overall equimolar amount of 2,4- and/or 2,6-toluene diisocyanate, the reaction is carried out in the presence of a polymerization accelerator. The new homopolyimides have a glass transition point of at least 320.degree. C. and are processible to moulded articles exhibiting a similarly good structural strength as could hitherto be observed in mixed polyimides only. Furthermore, the new homopolyimides can be spun to fibres.

    摘要翻译： 通过使3,3'，4,4'-二苯甲酮四羧酸二酐与等摩尔量的2,4-和/或2,6-二苯甲酮二酸酐反应制备具有通式“IMAGE”的结构单元的阻燃热稳定性新型均聚酰亚胺 甲苯二异氰酸酯，反应在聚合促进剂存在下进行。 新的均聚酰亚胺具有至少320℃的玻璃化转变点，并且对于仅在混合聚酰亚胺中可观察到的具有类似良好结构强度的模塑制品是可加工的。 此外，新的均聚酰亚胺可以纺丝成纤维。

    Mixed polyimides and process for preparing them
    3.
    发明授权
    Mixed polyimides and process for preparing them 失效
    混合聚酰亚胺及其制备方法

    公开(公告)号：US5066760A

    公开(公告)日：1991-11-19

    申请号：US546517

    申请日：1990-06-29

    申请人： Sigrid Seidl ,  Klaus Weinrotter ,  Reinhold Simharl

    发明人： Sigrid Seidl ,  Klaus Weinrotter ,  Reinhold Simharl

    IPC分类号： C08G18/22 ,  C08G18/34 ,  C08G73/10

    CPC分类号： C08G73/1042

    摘要： To produce mixed polyimides having structural units of the general formulae ##STR1## wherein n is an integer larger than 1 and R represents a divalent aromatic residue, a solution of an intramolecular tetracarboxylic acid dianhydride mixture including 50 to 99% by mol benzophenone-3,3',4,4'-tetracraboxylic acid dianhydride and 50 to 1% by mol pyromellitic acid dianhydride is heated in a polar aprotic solvent and is admixed with an altogether equimolar amount of 2,4- and/or 2,6-toluenediisocyanate and/or methylenebis(phenylisocyanate). The mixed polyimides according to the invention are readily soluble in organic solvents, are flame-retardant and exhibit a good thermostability.

    摘要翻译： 为了制备具有通式（I）和图像（II）的结构单元的混合聚酰亚胺，其中n是大于1的整数，R表示二价芳族残基，分子内四羧酸二酐混合物的溶液包括 50〜99％（摩尔）二苯甲酮-3,3'，4,4'-四异戊酸二酐和50〜1摩尔均苯四甲酸二酐在极性非质子溶剂中加热，与等摩尔量的2,4 - 和/或2,6-甲苯二异氰酸酯和/或亚甲基双（异氰酸苯酯）。 根据本发明的混合聚酰亚胺易溶于有机溶剂，具有阻燃性，并具有良好的热稳定性。

    Non-flammable, high-temperature resistant polyimide fibers made by a dry spinning method
    8.
    发明授权
    Non-flammable, high-temperature resistant polyimide fibers made by a dry spinning method 失效
    通过干纺法制成的不易燃，耐高温聚酰亚胺纤维

    公开(公告)号：US4801502A

    公开(公告)日：1989-01-31

    申请号：US48975

    申请日：1987-05-11

    申请人： Klaus Weinrotter ,  Thomas Jeszenszky ,  Heinrich Schmidt ,  Siegfried Baumann ,  Johann Kalleitner

    发明人： Klaus Weinrotter ,  Thomas Jeszenszky ,  Heinrich Schmidt ,  Siegfried Baumann ,  Johann Kalleitner

    IPC分类号： D01D5/04 ,  D01D5/253 ,  D01F6/74

    CPC分类号： D01F6/74 ,  Y10T428/2904 ,  Y10T428/2913 ,  Y10T428/2973

    摘要： Non-flammable, high-temperature resistant polyimide fibers have irregularly lobed or serrated cross-sections, a wool-like smooth hand and high brightness. They are produced by a dry-spinning process which is carried out in a spinning column, wherein a 20 to 40% solution of the polyimide is spun from spinnerets having circular orifices, the orifice numbers ranging from 20 to 800 and the orifice diameters from 100 to 300 .mu.m. An extrusion speed of between 20 and 100 m/min, a take-up speed of between 100 and 800 m/min, an amount of spin gas between 40 and 100 m.sup.3 /h under standard conditions and a spin gas temperature of between 200.degree. and 350.degree. C. are applied. The tows leaving the spinning column, which contain residual solvent from 5 to 25% by weight--based on dry polymer--and have a single filament titer of between 3.5 and 35 dtex, are washed in hot water, then they are dried to a moisture content of less than 5%, subsequently are drawn at high temperatures and, if desired, are crimpled and cut into staple fibers.

    摘要翻译： 不易燃，耐高温的聚酰亚胺纤维具有不规则的裂片或锯齿形横截面，羊毛状光滑的手和高亮度。 它们通过在纺丝塔中进行的干纺法制备，其中聚酰亚胺的20-40％溶液由具有圆形孔的喷丝头纺出，孔数为20至800，孔直径为100 至300亩。 挤出速度为20-100m / min，卷取速度为100-800m / min，旋转气体的量在标准条件下为40-100m 3 / h，旋转气体温度为200° 和350℃。 离开纺丝塔的丝束，其含有基于干燥聚合物的5至25重量％的残留溶剂，并且具有3.5至35分特之间的单丝滴定剂在热水中洗涤，然后将其干燥至水分 含量小于5％，随后在高温下拉伸，如果需要，将其卷曲并切成短纤维。