Boron/nitrogen/silicon preceramic polymers and boron nitride ceramic materials produced therefrom
US5145917A · kind A · utility
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3References
24Claims
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Key dates
| Filing date | Aug 10, 1990 |
| Grant date | Sep 8, 1992 |
| Priority date | — |
| Expiry date | Aug 10, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G79/08
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Boron/nitrogen/silicon preceramic polymers are prepared by copolymerizing at least one trihaloborane with at least one disilazane and at least one B-trichloroborazine; the resulting polymers, advantageously in fibrous form, are then facilely crosslinked and pyrolyzed into boron nitride ceramic materials.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.