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In the last 20-30 years ecological requirements caused high interest in coating
systems which allow both reduction of VOC emission and a decrease in energy
consumption for drying and hardening. Thus, the coatings industry and raw
materials suppliers have made strong efforts to find new solutions and improvements
for waterborne coatings, high-solids, powder coatings and radiation curable
materials. All these systems have certain advantages but also disadvantages.
Therefore they have found commercial use in several fields of application but
none of them can completely replace conventional solvent-based coating
materials.
Due to the known advantages of radiation curing coatings, e.g.
• high production rate,
• reduced floor space, energy consumption and processing time before following
production steps, and
• the total elimination of organic solvents
radiation curing technology has been the most promising over years even
compared to waterborne and powder coatings. This has led to a high growth in
consumption of such materials. Radiation curable coating materials have special
fields of application where they possess high market shares. The overall
percentage in the field of coatings (without the printing industry) is, however,
relatively low (1-4). An essential reason for this is the fact that many industrially
coated substrates are metals.
