A curable composition comprises a) at least one epoxide compound E having at least two epoxide groups; b) at least one amine A having at least two amine hydrogens; and c) at least one acrylic ester U; wherein the epoxide compound E comprises at least one epoxide compound E′, the amine A comprises at least one amine A′, and the acrylic ester U comprises at least one acrylic ester U′ whose Hansen solubility parameters for the dipole forces δp and for the specific interactions δh satisfy the following conditions: ( δ p ⁡ ( U ′ ) - δ p ⁡ ( E ′ ) ) 2 + ( δ h ⁡ ( U ′ ) - δ h ⁡ ( E ′ ) ) 2 ≥ 1.5 ⁢ ⁢ and ( δ p ⁡ ( U ′ ) 2 + δ h ⁡ ( U ′ ) 2 ) - ( δ p ⁡ ( A ′ ) 2 + δ h ⁡ ( A ′ ) 2 ) ≥ 0 . A suitable choice of the Hansen solubility parameters of the constituents ensures that the acrylic ester is incorporated covalently into the curing material, preventing subsequent evaporation of the diluent.