Coating materials curable thermally, or thermally and with actinic radiation, comprising (A) binder selected from the group consisting of random, alternating and block, linear, branched and comb polyaddition resins, polycondensation resins, and addition (co)polymers of olefinically unsaturated monomers, curable physically, thermally, with actinic radiation, and thermally and with actinic radiation; and (B) nanoparticles selected from the group consisting of nanoparticles modified with at least one compound of the general formula I: [(S--).sub.o-L-].sub.n-M-(--X--R).sub.m-n , (I) where the indices and the variables have the following meanings: S is a reactive functional group having at least one bond which can be activated with actinic radiation; L is at least one divalent organic linking group; X independently at each occurrence is an oxygen atom, sulfur atom or>NR.sup.1, where R.sup.1=hydrogen atom or alkyl group having from 1 to 4 carbon atoms; M is a metal atom; R is a monovalent organic radical; o is an integer from 1 to 5; m is 3 or 4; n is 1 or 2 if m=3, and n is 1, 2 or 3 if m=4, and their use for producing clearcoat systems and multicoat color and/or effect paint systems or as adhesives and sealing compounds.