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公开(公告)号:US5470933A
公开(公告)日:1995-11-28
申请号:US120815
申请日:1993-09-15
IPC分类号: C04B35/583 , C08G79/00 , C08G79/08 , C08F30/06
CPC分类号: C08G79/08
摘要: Monodisperse, homogeneous polyaminoborazines, well suited for pyrolysis into ceramic BN shaped articles, e.g., fibers, films, etc., are prepared by thermally polycondensing a trifunctional aminoborazine under conditions of polycondensation reaction equilibrium.
摘要翻译: 通过在缩聚反应平衡的条件下热缩聚三官能氨基硼嗪,制备了非常适合于热解成陶瓷BN形状制品例如纤维,膜等的单分散均匀多氨基硼嗪。
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公开(公告)号:US5021371A
公开(公告)日:1991-06-04
申请号:US482073
申请日:1990-02-20
申请人: Gerard Mignani , Pierre Ardaud , Roger Trichon
发明人: Gerard Mignani , Pierre Ardaud , Roger Trichon
IPC分类号: C01B21/064 , C04B35/583 , C08G79/08 , D01F9/10
CPC分类号: C08G79/08 , C01B21/064 , C01B21/0646 , C04B35/583
摘要: Highly pure boron nitride ceramic material, devoid of silicon values and having low carbon content, is prepared by pyrolyzing, under an atmosphere of ammonia, the product of the reaction between (i) at least one B-trihalogeno-borazole having the formula: ##STR1## and (ii) at least one primary amine having the formula:H.sub.2 N--Rin which formulae X is a halogen atom and R is an optionally substituted hydrocarbon radical having from 1 to 6 carbon atoms.
摘要翻译: 通过在氨气氛下热解(i)至少一种具有下列结构式的β-三卤代 - 硼唑之间的反应产物,制备无纯硅含量低的碳氮化硼陶瓷材料: 和(ii)至少一种具有下式的伯胺:其中式X是卤素原子,R是具有1至6个碳原子的任选取代的烃基。
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