US 2003/0113536 A1 · Method for making boron nitride fibres from aminoborazines

Abstract

The invention concerns a method for making boron nitride fibres by drawing a polymer precursor and treating with ceramics the polymer fibres obtained by drawing. The invention is characterized in that the precursor polymer is obtained by thermal polymerization of a borazine of formula (I) wherein: R1, R3, R4 and R5, identical or different, represent an alkyl, cycloalkyl or aryl group; and R2 represents a hydrogen atom or an alkyl, cycloalkyl or aryl group.

Claims9

Dependent claims

Process for manufacturing boron nitride fibres by spinning of a precursor polymer and ceramisation of the polymer fibres obtained by spinning, characterised in that the precursor polymer is obtained by thermal polymerisation of a borazine of formula (I):

4
in which R1, R3, R4 and R5 that may be identical or different, represent an alkyl, cycloalkyl or aryl group, and
R2 represents a hydrogen atom or an alkyl, cycloalkyl or aryl group:

Dependencies are inferred from the claim text.

Facts

Application

10/220,269Filed 6 Sep 2002

Priority

FR 00/0337716 Mar 2000

Published

19 Jun 2003

Term ends

Not estimatedThe source records don’t support an estimate.

Classification4 codes

D01F 9/08
Artificial filaments or the like of other substances; Manufacture thereof; Apparatus specially adapted for the manufacture of carbon filaments: of…
Y10T 428/2913
Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof: rod, strand,…
D01F
Chemical features in the manufacture of artificial filaments, threads, fibres, bristles or
Y10T
Technical subjects covered by former us classification

Method for making boron nitride fibres from aminoborazines

Life of this patent

Method for making boron nitride fibres from aminoborazines

Life of this patent

Abstract

Claims9