Process of manufacturing boron ceramics from carboralated diacetylene polymers
AssigneeHoechst Celanese Corporation
InventorRobert E. Johnson
Life of this patent
Estimating the term…
Abstract
Boron-containing ceramics are formed from organoboron precermaic polymers which are carboralated acetylenic poolymers. The polymers can be formed by carboralating acetylenic or diacetylenic diols and condensing the diols to form carboralated polyesters. In an alternative process, polydiacetylene formed by the polymerization of diacetylene monomers having conjugated triple bonds are carboralated subsequent to polymerization. A process for obtaining readily soluble polydiacetylenes comprises heating a diacetylene diol in a high boiling solvent.
Claims8
A process for producing a boron-containing ceramic from organoboron preceramic polymers comprising:
- forming a preceramic polymer by carboralating a polydiacetylene polymer which contains as a repeating unit a conjugated double and triple bond so as to form carborane units at the location of said triple bonds of said polydiacetylene and pyrolyzing said carboralated polydiacetylene at a temperature sufficient to convert said carboralated polydiacetylene to a boron-containing ceramic.
Dependencies are inferred from the claim text.