Cationic catalysis process for the treatment of a polysilazane containing on average at least two .tbd.SiH groups per molecule
US4861844A · kind A · utility
11Cited by
9References
19Claims
0Family size
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Key dates
| Filing date | Feb 22, 1988 |
| Grant date | Aug 29, 1989 |
| Priority date | — |
| Expiry date | Feb 22, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G77/62
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process for the catalytic treatment of a polysilazane containing an average of at least two, preferably at least three, .tbd.SiH groups per molecule with a catalytically effective quantity of a strong inorganic or organic acid catalyst. The other organic radicals in the polysilazane that are bonded to the silicon or nitrogen atoms are hydrocarbon radicals free from alkene or alkyne unsaturations. The polysilazanes treated in this manner can be characterized by good thermal behavior and can be used, in particular, as precursors of ceramic products with a high yield of inorganic products.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.