PROCESS FOR THE SYNTHESIS OF BORON NITRIDE PRECURSOR BORON-BASED POLYMERS AND PRODUCTS LIKELY TO BE OBTAINED THEREBY

摘要

The invention relates to a process for the synthesis of boron and nitrogen-based polymers which are precursors of boron nitride by reaction between at least one trihaloborane and at least one silazane compound having at least one CongSi-NH-SiCong group, and characterized in that it consists in gradually introducing, while maintaining the reaction medium at a temperature of between approximately -100 degree (s) C and 0 degree (s) C, said silazane compound in said trihaloborane, the molar ratio [silazane ] / [trihalogénoborane] being greater than 1, then recovering the reaction product thus obtained. /P P It also relates to new polymers capable of being obtained by this process.