Compositions which undergo light-induced cationic curing and their use

Composition which undergoes cationic curing with visible light, comprising

• (a) 0.01 to 8 wt. % of at least one diaryliodonium compound having the following structure:
• [(R.sup.1).sub.a Ar.sup.1)--I--(Ar.sup.2 (R.sup.2).sub.b)].sup.+ Y.sup.-
• wherein the symbols denote:
• Ar.sup.1 , Ar.sup.2 independently of one another different, substituted or unsubstituted, fused or non-fused aromatic systems having 4 to 20 C atoms, preferably phenyl, tolyl, cumyl, anisyl, chlorophenyl, nitrophenyl, naphthyl, thienyl, furanyl and pyrazolyl,
• R.sup.1, R.sup.2 independently of one another an H atom, an aliphatic radical having 1 to 19, preferably 1 to 9 C atoms, it being possible for one or more C atoms to be replaced by O, C.dbd.O, --O(C=0)--, F, Cl, Br, SiR.sup.3.sub.3 and/or NR.sup.3.sub.2, wherein R.sup.3 is an aliphatic radical having 1 to 7 C atoms, in which one or more C atoms can be replaced by O, C.dbd.O and/or --O(C.dbd.O)--, wherein the aromatics Ar.sup.1 and Ar.sup.2 can be bonded to one another via R.sup.1 and/or R.sup.2,
• a and b independently of one another an integer from 1 to 5 and Y.sup.- =B(C.sub.6 F.sub.5).sub.4.sup.-,
• (b) 0.01 to 8 wt. % of at least one .alpha.-dicarbonyl compound,
• (c) 10.0 to 99.9 wt. % of at least one compound containing epoxide groups and/or oxetane groups,
• (d) 0 to 85 wt. % of modifiers, such as fillers, dyestuffs, pigments, flow improvers, thixotropic agents, polymeric thickeners, additives having an oxidizing action, stabilizers and retardants,
• characterized in that it additionally comprises
• (e) 0.001 to 5 wt. % of at least one aromatic amine having the following structure:
• ##STR7## in which R.sup.6, R.sup.7 and R.sup.8 independently of one another denote an H atom, an aliphatic, aromatic or araliphatic radical having 1 to 19 C atoms, it being possible for one or more C atoms to be replaced by O, C.dbd.O, --O(C.dbd.O)--, SiR.sup.9.sub.3 and/or NR.sup.9.sub.2, and R.sup.9 is an aliphatic radical having 1 to 7 C atoms, in which one or more C atoms can be replaced by O, C.dbd.O and/or O(C.dbd.O), and z can assume numerical values from 1 to 5 and R.sup.6 and R.sup.7 and/or R.sup.6 and R.sup.8 together can form ring structures which can be unsubstituted or substituted by aliphatic cycloaliphatic, aromatic, heteroaromatic or fused aromatic radicals.