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MANUFACTURE OF ORGANOPOLYSILAZANE AND ORGANOPOLY(DISILYL)SILAZANE HAVING IMPROVED THERMAL BEHAVIORAND USE FOR CERAMIC PRECURSOR PARTICULARLY
MANUFACTURE OF ORGANOPOLYSILAZANE AND ORGANOPOLY(DISILYL)SILAZANE HAVING IMPROVED THERMAL BEHAVIORAND USE FOR CERAMIC PRECURSOR PARTICULARLY
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机译:有机硅和有机硅二氮杂硅的制造对陶瓷前体的热行为改善了
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摘要
The present invention relates to a process for the treatment of polysilazane in a homogeneous phase with a catalytically effective quantity of an acid catalyst selected from HClO4 and CF3SO3H. The polysilazane is preferably selected from the group consisting of organopolysilazane, organopoly(disilyl)silazane and mixtures thereof. The organic radicals bonded to the silicon atoms are preferably saturated or aromatic hydrocarbon radicals and the silicon atoms of the polysilazane are substantially free from any hydrogen atom bonded directly to the silicon atoms. The polysilazanes treated in this manner have good thermal behavior and, are particularly useful as precursors of ceramic products.
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