发明名称 |
POLYSILANE-POLYCARBOSILANES WITH REDUCED CHLORINE CONTENT BASED ON METHYLCHLOROPOLYSILANES, AND SPINNING DOPES AND CERAMIC MOLDINGS PRODUCED THEREFROM |
摘要 |
The present invention pertains to a process for producing unmeltable polysilane-polycarbosilane copolymers which are soluble in inert solvents, comprising the steps providing the product of a disproportionation of a methylchlorodisilane or a mixture of several methylchlorodisilanes of the composition Si2MenCl6-n, wherein n=1-4, wherein the disproportionation was carried out with a Lewis base as a catalyst, wherein this product is a chlorine-containing, crude polysilane/oligosilane containing hydrocarbon groups, and thermally postcrosslinking the crude polysilane/oligosilane to a polysilane-polycarbosilane copolymer, characterized in that the chlorine content of the polysilane-polycarbosilane copolymer is lowered by reacting the crude polysilane/oligosilane with a substitution agent, by which chlorine bound therein is replaced with a chlorine-free substituent. Green fibers and low-oxygen/oxygen-free ceramic fibers with a very low chlorine content can be produced using this process. |
申请公布号 |
EP2361275(A2) |
申请公布日期 |
2011.08.31 |
申请号 |
EP20090795996 |
申请日期 |
2009.12.21 |
申请人 |
FRAUNHOFER-GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG E.V. |
发明人 |
RUEDINGER, ARNE;CLADE, JUERGEN;SPANIOL, HEIKO;SPORN, DIETER |
分类号 |
C08G77/60;C04B35/571;C08L83/16;D01F9/10 |
主分类号 |
C08G77/60 |
代理机构 |
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