Elastic coating system comprising uv-curable urethane (meth)acrylates containing free isocyanate groups and (meth)acryloyl groups

摘要

A coating system comprising a urethane (meth)acrylate, which contains (meth)acryloyl groups and free isocyanate groups, optionally a further polyisocyanate, a UV initiator which initiates free radical polymerization, and one or more compounds which are reactive with isocyanates. The urethane (meth)acrylate contains a diol which possesses ester groups and has an average molecular weight of 176-2000 in an amount of 1-65wt% based on the amount of other constituents of the urethane (meth)acrylate.