AQUEOUS COATING COMPOSITIONS CONTAINING URETHANE (METH)ACYLATES HAVING UV-HARDENING ISOCYANATE GROUPS

摘要

The present invention relates to an aqueous coating composition containing a) a urethane (meth)acrylate having (meth)acryloyl groups and optionally fre e isocyanate groups, b) optionally a further polyisocyanate, c) a UV initiator which initiates polymerization by a free radical mechanism , and d) one or more aqueous binders containing isocyanate-reactive groups. The present invention also relates to the use of the coating compositions fo r coating various substrates, especially metal substrates.