The use of monomeric triazene compounds having organic radicals as heat- and/or photosensitive free radical initiators for free radical polymerization is described in U.S. Pat. No. 4,137,226. Furthermore, the use of bistriazenes as crosslinking agents for fluorine-containing polyimides and aromatic polymers is described in A. Lau, L. Vo, Macromolecules 25, 7294 (1992).
It is advantageous if free radical initiators for silane and organosiloxane compositions are physically compatible with these compositions i.e. miscible or can be dissolved therein. Silyltriazenes which indeed have organosilicon groups but are very unstable and in some cases explosive and therefore not suitable as initiators for industrial applications are known from N. Wiberg et al., Z. Anorg. Allg. Chem. 562, 91 (1988). They are furthermore distinguished by a covalent Si--N bond.
The object of the present invention was to provide silanes and organosiloxanes which can be employed as heat- and/or photosensitive free radical initiators.