申请人:ETHYL CORPORATION
公开号:EP0325483A1
公开(公告)日:1989-07-26
Preceramic polymers which have particular utility in providing protective ceramic coatings on carbon/carbon composites, graphite, carbon fibers, and other normally oxidizable materials are prepared by reacting 0.25-20 parts by weight of a trialkyl-, trialkoxy-, or triaryloxyboroxine in which any alkyl or alkoxy groups contain 1-6 carbons with one part by weight of a polysilazane to form an organoborosilazane polymer.
预陶瓷聚合物在为碳/碳复合材料、石墨、碳纤维和其他通常可氧化的材料提供保护性陶瓷涂层方面具有特殊用途,其制备方法是将 0.25-20 重量份的三烷基、三烷氧基或三芳基氧基硼氧烷(其中任何烷基或烷氧基基团均含有 1-6 个碳原子)与 1 重量份的聚硅氧烷反应,形成有机硼硅烷聚合物。