PROCEDE DE PREPARATION DE POLYMERES BASED DE BORE ET D'AZOTE USTILISABLES NOTAMMENT POUR THE MANUFACTURE OF CERUIQUE PRODUCTS AND CERAMIQUE-BASED NITRURE PRODUCTS

摘要

Process for the preparation of an organoboron polymer precursor of boron nitride, the said process being characterised by reacting a) a mixture comprising a trihaloborane (compound A) and a cyclic compound (compound B) consisting of repeat units of formula: …IMAGE… in which A denotes a halogen atom and R a radical chosen from the hydrogen atom, the hydrocarbon radicals and the organosilylated and hydroorganosilylated radicals, with b) a compound containing at least one NH2 group (compound C). …??The invention also relates to the new polymers obtained by the said process.