Boron/nitrogen preceramic polymers and boron nitride ceramic materials produced therefrom
US4939222A · kind A · utility
5Cited by
1References
12Claims
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Key dates
| Filing date | Sep 12, 1988 |
| Grant date | Jul 3, 1990 |
| Priority date | — |
| Expiry date | Sep 12, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G79/08
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Crosslinked boron/nitrogen preceramic polymers are prepared by reacting (a) admixture of a trihalogenoborane A and a compound B containing at least one dihalogenated boron atom, with (b) an amino compound C containing at least one --NH.sub.2 group; the resulting polymers are facilely pyrolyzed into boron nitride ceramic materials.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.