Patent ID: 7381785

Claim:
A process for preparing binders comprising reacting A) one or more NCO-functional compounds containing uretdione groups first with B) one or more compounds which contain groups capable of participating in polymerization reaction with ethylenically unsaturated compounds on exposure to actinic radiation, and contain isocyanate-reactive groups, followed by C) reaction with one or more hydroxyl-containing compounds other than B), wherein at least one of these compounds has an OH functionality of ≧2, D) in the presence of one or more compounds containing phenoxide groups, as catalysts, and E) optionally auxiliaries and additives, wherein the reaction with compounds of component C) proceeds at least proportionally with the formation of allophanate groups and wherein the binder contains allophanate groups and groups capable of participating in a polymerization reaction with ethylenically unsaturated compounds on exposure to actinic radiation, and optionally also contain NCO-reactive groups.