| abstract |
The present document describes the use of an inhibitor for cationic polymerization as an additive to a thermocurable composition based on at least one cationically polymerizable organic material and an initiator for cationic polymerization in the form of an onium compound or a compound of the formula (I) (M+n(L)x)n+nX-(I), in which n is 2 or 3, M is a metal cation selected from the group comprising Zn2+, Mg2+, Fe2+, Co2+, Ni2+, Cr2+, Ru2+, Mn2+, Sn2+, VO2+, Fe3+, Al3+ and Co3+, X- is an anion selected from the group comprising PF6-, AsF6-, SbF6-, BiF6-, derivatives of these anions in which at least one fluorine atom has been replaced by a hydroxyl group, and CF3SO3-, or in which up to 50% of the anions X-, based on the total amount of anions, may be any desired anions, L is water or an organic (Sigma)-donor ligand which contains, as bonding sites, one or more functional radicals selected from the group comprising -CO-, -CO-O-, -O-CO-O- and -O- and forms (Sigma)-bonds with the central atom via the oxygen atom or atoms, and x is an integer from 0 to 6, and where the ligands L may be different within said definitions, or as an additive to components for the preparation of a composition of this type for avoiding initiator decomposition products which are formed due to moisture and reduce the thermal stability of the composition, and/or for increasing the thermal stability of the composition for a limited time before curing. |