Patent ID: 6180809
Filing Date: 2001-01-30
Classification: C08G

Abstract:
A method for preparing a boron and silicon oxynitride comprising:preparing a polyborosiloxane precursor, andconducting nitriding pyrolysis of the precursor to obtain an amorphous boron and silicon oxynitride,wherein said polyborosiloxane is prepared by condensing, in the presence of a catalyst,a polychlorosilane represented by the formula R.sup.3 R.sup.4 SiCl.sub.2 in which the substituents R.sup.3 and R.sup.4 are identical or different and each represents a hydrogen atom, a chlorine atom, a linear or branched alkyl or alkenyl or alkynyl radical having 5 or less carbon atoms, or an aryl or aralkyl radical having 6 to 18 carbon atoms, withan alkyl borate represented by the formula (R.sup.5 O).sub.3 B in which R.sup.5 represents a linear or branched alkyl radical having 1 to 5 carbon atoms.