A mixture and method for preparing a composition curable thermally and
with actinic radiation comprising a binder free from carbon-carbon double
bonds activatable with actinic radiation, at least one blocked or
unblocked polyisocyanate having at least one soft, flexibilizing segment,
and at least one unsaturated polyfunctional urethane that is free from
isocyanate-reactive functional groups and contains on average per
molecule more than four carbon-carbon double bonds activatable with
actinic radiation and at least one hardening segment.