| abstract |
The invention relates to curable compositions comprising a) a cationically polymerizable organic material, b) at least one organic compound which contains at least one hydroxyl or a thiol group, and c) as a curing catalyst, at least one sulfonium salt of the formulas (I), (II), ( III) or (IV): <IMAGE> <IMAGE> <IMAGE> wherein in formulas (I) to (IV) A for C1-C12-alkyl, C3-C8-cycloalkyl, C4-C10-cycloalkylalkyl, unsubstituted or substituted phenyl, Ar, Ar1 and Ar2 each independently represent an unsubstituted or substituted phenyl or naphthyl, arylene each represents an unsubstituted or substituted phenylene or naphthylene and Q <-> represents SbF6 <->, AsF6 <-> or SbF5OH <- > stands. The compositions are preferably used as casting and impregnation resins. |