| abstract |
The invention relates to the use of triazenes of formula (I) wherein Q is a direct bond or a bivalent radical -(CR 8 R 9 )-, Z 1 is -O-, -NR 10 -, -CH 2 -,-(CR 11 R 12 )- or -C(=O)- and R 1 to R 12 are optionally substituted hydrocarbon residues, as precursors for radicals useful in reactions triggered by free radicals, such as polymerization of unsaturated monomers and degradation of polyolefins. Most of the triazenes of formula (I) are novel and claimed, too, as well as the preparation of triazenes of formula (I) and polymerisable compositions comprising them. |