초록 ▼

Organometallic boron/nitrogen polymers, precursors of boron nitride, are prepared by reacting at least one trihalogenoborane with at least one silazane compound containing at least one ≡Si－NH－Si≡group, by gradually introducing the silazane compound into the trihalogenoborane, while maintaining the r

Organometallic boron/nitrogen polymers, precursors of boron nitride, are prepared by reacting at least one trihalogenoborane with at least one silazane compound containing at least one ≡Si－NH－Si≡group, by gradually introducing the silazane compound into the trihalogenoborane, while maintaining the reaction medium at a temperature ranging from -100°to 0°C. and wherein the ratio of the gram equivalents of the ≡Si－NH－Si≡groups of the silazane to the number of moles of trihalogenoborane is greater than 1; the resulting organometallic polymers are facilely pyrolyzed into boron nitride ceramic materials.

대표청구항 ▼

A process for the preparation of an organometallic boron/nitrogen polymer, comprising reacting at least one trihalogenoborane with at least one silazane compound containing at least one ≡Si－NH－Si≡group, by gradually introducing said silazane compound into said trihalogenoborane, while maintaining th

A process for the preparation of an organometallic boron/nitrogen polymer, comprising reacting at least one trihalogenoborane with at least one silazane compound containing at least one ≡Si－NH－Si≡group, by gradually introducing said silazane compound into said trihalogenoborane, while maintaining the reaction medium at a temperature ranging from about -100°C. to 0°C., with the ratio of the number of gram equivalents of the ≡Si－NH－Si≡groups of the silazane to the number of moles of trihalogenoborane being greater than 1, and then recovering the organometallic polymer thus produced.