Multicomponent system that can be cured thermally or by actinic radiation, method for producing the same and the use thereof

A multicomponent system curable thermally and with actinic radiation, comprising

• A) an isocyanate-reactive binder component comprising
• A1) at least one unsaturated polyester whose molecule contains on average at least one group that can be activated with actinic radiation that is at least one of formula I, formula II, and formula III
• wherein n is an integer from 1 to 10, and at least one of
• A2) at least one binder, different than the polyester (A1), whose molecule comprises on average at least two isocyanate-reactive functional groups, and
• A3) at least one binder, different than the polyester (A1), whose molecule comprises on average at least one isocyanate-reactive functional group and at least one reactive functional group having at least one bond that can be activated with actinic radiation;
• and
• B) a crosslinker component comprising at least one of
• B1) at least one polyisocyanate, and
• B2) at least one polyisocyanate whose molecule comprises on average at least one reactive functional group having at least one bond that can be activated with actinic radiation.