Process for the treatment of polyorganosilazanes and/or of polyorgano(disilyl)silazanes by means of a treatment of polyorganosilazanes with a catalyst system comprising an ionic inorganic salt and a complexing compound
US4694060A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 6, 1986 |
| Grant date | Sep 15, 1987 |
| Priority date | — |
| Expiry date | May 6, 2006 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L83/16
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process for the treatment of polyorganosilazanes and/or polyorgano(disilyl)silazanes with an effective quantity of a catalyst system comprising (i) an ionic inorganic salt of the formula M.sup.30 A.sup.-, and (II) a compound capable of complexing with the cation M.sup.+ of the salt. The M.sup.+ cation is a metal ion or a quaternary ammonium ion, and A.sup.- is a compatible anion. The polysilazanes are selected from organopolysilazanes and organopoly(disilyl)silazanes. When treated in this manner, the polysilazanes are characterized by good thermal behavior and can, in particular, be used, after pyrolysis, as precursors of ceramic products.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.