RADIATION CURABLE COATINGS BASED ON URETDIONE POLYISOCYANATES

摘要

A radiation curable coating composition that includes from about 5 to about 70% by weight of the reaction product of i) one or more polyisocyanate s, where at least 10 equivalent percent of the isocyanate groups are in the for m of uretdione groups, and ii) one or more hydroxy functional lactone ester (meth)acrylates. The amount of component i), on an isocyanate equivalent basis, is equal to the amount of hydroxy equivalents of hydroxy containing material s in the composition. The composition can be used to coat substrates by coating a t least a portion of the substrate with the above-described coating compositio n and subjecting the coated substrate to radiation.