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    Preparation of polyimide powder
    1.
    发明授权
    Preparation of polyimide powder 失效
    聚酰亚胺粉末的制备

    公开(公告)号：US4413117A

    公开(公告)日：1983-11-01

    申请号：US385273

    申请日：1982-06-04

    申请人： Udo Reiter ,  Jenoe Kovacs ,  Hans-Uwe Schenck

    发明人： Udo Reiter ,  Jenoe Kovacs ,  Hans-Uwe Schenck

    IPC分类号： C08G73/00 ,  C08G73/10 ,  C08J3/14

    CPC分类号： C08J3/14 ,  C08G73/1007 ,  C08G73/1028 ,  C08G73/1032 ,  C08J2379/08

    摘要： A polyimide powder particularly suitable for the production of moldings by high pressure sintering is prepared by mixing a solution of an aromatic polyimido-acid, obtained by a conventional process and having an intrinsic viscosity of 1.5 to 2.5 dl/g, in an aprotic dipolar organic solvent, with a water-entraining agent, heating the mixture to the boiling point of the entraining agent, azeotropically distilling off the water formed, filtering off the polyimide powder which precipitates, washing it if appropriate, and drying it.

    摘要翻译： 通过将通过常规方法获得的特性粘度为1.5至2.5dl / g的芳族聚酰亚胺酸溶液混合在非质子偶极有机物中制备特别适用于通过高压烧结生产模制品的聚酰亚胺粉末 溶剂，加入助剂，将混合物加热至加入剂的沸点，共沸蒸馏掉形成的水，过滤掉沉淀的聚酰亚胺粉末，适当洗涤并干燥。

    Manufacture of paper-like and textile-like sheets
    5.
    发明授权
    Manufacture of paper-like and textile-like sheets 失效
    制造纸样和纺织样片材

    公开(公告)号：US4098640A

    公开(公告)日：1978-07-04

    申请号：US727583

    申请日：1976-09-28

    申请人： Bruno Sander ,  Heinz Berbner ,  Rolf Steinberger ,  Eckhard Ropte ,  Jenoe Kovacs ,  Joachim Kunde

    发明人： Bruno Sander ,  Heinz Berbner ,  Rolf Steinberger ,  Eckhard Ropte ,  Jenoe Kovacs ,  Joachim Kunde

    IPC分类号： D01D5/40 ,  D21H13/26 ,  D21F11/00

    CPC分类号： D21H13/26 ,  D01D5/40

    摘要： The manufacture of paper-like and textile-like sheet materials by the use of fibrids which have been obtained by dissolving poly(amide-imide) resins in an organic solvent, mixing the resulting solution with a liquid which is a non-solvent for the polymer and introducing the resulting solution into a liquid precipitation medium while exposing it to shearing forces.The present invention relates to the use, for the manufacture of paper-like and textile-like sheet materials, of novel fibrids, which have been obtained by dissolving poly(amide-imide) resins in an organic solvent, mixing the resulting solution with a liquid which is a non-solvent for the polymer and introducing the resulting solution into a liquid precipitation medium while exposing it to shearing forces.

    摘要翻译： 通过使用通过将聚（酰胺 - 酰亚胺）树脂溶解在有机溶剂中而获得的纤条体来制造纸状和织物状片状材料，将得到的溶液与作为非溶剂的液体混合 聚合物并将所得溶液引入液体沉淀介质中，同时将其暴露于剪切力。

    Polyamide-imide precondensates
    8.
    发明授权
    Polyamide-imide precondensates 失效
    聚酰胺酰亚胺预缩合物

    公开(公告)号：US4121266A

    公开(公告)日：1978-10-17

    申请号：US693351

    申请日：1976-06-07

    申请人： Jenoe Kovacs ,  Hans Jung ,  Matthias Marx ,  Herbert Spoor

    发明人： Jenoe Kovacs ,  Hans Jung ,  Matthias Marx ,  Herbert Spoor

    IPC分类号： C08G73/00 ,  C08G73/14 ,  C09D179/08 ,  H01B3/30 ,  C08G69/26

    CPC分类号： H01B3/306 ,  C08G73/14 ,  H01B3/305 ,  Y10T428/31623

    摘要： A polyamide-imide precondensate which is solid at room temperature, but is fusible and soluble in polar solvents. It is manufactured by first condensing 1 mole of diamine with 2 moles of tricarboxylic acid anhydride in a diol as the solvent, to give a diimide-dicarboxylic acid, then esterifying the diimide-dicarboxylic acid with the diol and finally effecting the polycondensation by adding 1 mole of diamine per mole of diester. The precondensate may be used, as a melt, as a solution in organic solvents or as an aqueous dispersion, for coating electrical conductors.

    摘要翻译： 聚酰胺 - 酰亚胺预缩合物，在室温下为固体，但易熔，易溶于极性溶剂。 通过在二醇中首先将1摩尔二胺与2摩尔三羧酸缩合作为溶剂，得到二酰亚胺 - 二羧酸，然后将二酰亚胺二羧酸与二醇酯化，最后通过加入1进行缩聚来进行缩聚 摩尔二胺/摩尔二酯。 预缩合物可以作为熔体用作有机溶剂或作为水分散体的溶液用于涂覆电导体。