Process for the Continuous Preparation and Isolation of Soluble Preceramic Oligomers and/or Polymers
    48.
    发明申请
    Process for the Continuous Preparation and Isolation of Soluble Preceramic Oligomers and/or Polymers 失效
    连续制备和分离可溶性前陶瓷低聚物和/或聚合物的方法

    公开(公告)号:US20080255325A1

    公开(公告)日:2008-10-16

    申请号:US12066367

    申请日:2006-09-07

    IPC分类号: C08G85/00 C08G77/00

    CPC分类号: C07F7/025 C04B2235/486

    摘要: The invention relates to a method for continuously producing pre-ceramic polymers. The inventive method consists in synthesising polymers, in separating polymers from a reaction mixture and in thermally conditioning for defining a cross linkage degree and Theological properties, wherein all said steps are integrated into a single method. The thus obtainable polymers are used in the form of an initial material for producing non-oxidised ceramics in ternary X/Y/N or X/Y/N/C quaternary systems. Said materials are characterized by the high mechanical, thermal and chemical resistance thereof, wherein any X and Y combination can represent in particular Si, B, P, Al, Ti, V, Zr, Ta elements.

    摘要翻译: 本发明涉及连续生产预陶瓷聚合物的方法。 本发明的方法包括在将聚合物与反应混合物分离并在用于定义交联度和热学性质的热调节中合成聚合物,其中所有所述步骤被整合成单一方法。 由此获得的聚合物以用于在三元X / Y / N或X / Y / N / C四元体系中生产非氧化陶瓷的初始材料的形式使用。 所述材料的特征在于其机械,耐热和耐化学性能高,其中任何X和Y组合可特别表示Si,B,P,Al,Ti,V,Zr,Ta元素。

    Boron ceramics from carboralated diacetylene polymers
    50.
    发明授权
    Boron ceramics from carboralated diacetylene polymers 失效
    来自碳化二乙炔聚合物的硼陶瓷

    公开(公告)号:US4946919A

    公开(公告)日:1990-08-07

    申请号:US273089

    申请日:1988-11-18

    申请人: Robert E. Johnson

    发明人: Robert E. Johnson

    摘要: Boron-containing ceramics are formed from organoboron preceramic polymers which are carboralated acetylenic polymers. The polymers can be formed by carboralating acetylenic or diacetylenic diols and condensing the diols to form carboralated polyesters. In an alternative process, polydiacetylene formed by the polymerization of diacetylene monomers having conjugated triple bonds are carboralated subsequent to polymerization. A process for obtaining readily soluble polydiacetylenes comprises heating a diacetylene diol in a high boiling solvent.

    摘要翻译: 含硼陶瓷由碳化硼炔属聚合物的有机硼前陶瓷聚合物形成。 聚合物可以通过碳氢化炔属或二乙炔二醇形成,并将二醇缩合形成碳酸酯化的聚酯。 在替代方法中,通过聚合具有共轭三键的二乙炔单体形成的聚二乙炔在聚合之后是碳氢化的。 获得容易溶解的聚二乙炔的方法包括在高沸点溶剂中加热二乙炔二醇。