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The marriage between radiation curing technology and water based resin technology
remains one of the most elegant approaches to yield zero VOC and safe coating systems.
It is now 16 years since the first articles on this subject were written, and the advantages
of water based radiation curable systems have been extensively discussed (1, 2, 3, 4).
The increasing interest and market acceptance means in fact a recognition of a number of
those unique advantages.
Nearly all the systems described to date have unsurprisingly been UV-curable systems
making use of free radical generating photoinitiators, and involving polymers with
acrylate double bonds. A variety of chemistries has been used including polyesters,
polyurethanes, nitrocellulose, acrylics and other addition polymers (5, 6).
This paper presents experimental results obtained with a new, high performance and
water based radiation curable bimodal urethane-acrylic polymer.
