Polysilazane composition which can crosslink in the presence of a metal compound catalyzing a hydrosilylation reaction
US4689252A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 28, 1986 |
| Grant date | Aug 25, 1987 |
| Priority date | — |
| Expiry date | Mar 28, 2006 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L83/16
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A crosslinkable composition comprising at least one polysilazane containing at least 2, preferably at least 3, .tbd.SiH groups per molecule and at least 2 SiR.sub.2 groups per molecule, R.sub.2 being an unsaturated hydrocarbon radical and a catalytically effective quantity of a metal element or of a metal compound to catalyze the hydrosilylation reaction SiH/SiR.sub.2. The compositions according to the invention can crosslink under the effect of heat and can be used for coating or impregnating substrates with ceramic material after pyrolysis. The mechanical properties of the crosslinked compositions are assessed by evaluating the relative rigidity RR measured by the fiber torsion pendulum method (FIG. 1).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.