Traditional paints are diluted with solvents. During the drying
process, solvents vaporize into the atmosphere, causing pollution
to the environment. To rectify this drawback, a few new
solvent-free paint systems had been developed. Among these systems,
UV coating gives the fastest curing speed disregard of substrates
and baking process.
As the name suggests, UV coating is a system that dries up” by UV
radiation. The constituent in the paint accounted for receiving the
UV radiation is a compound known as the photoinitiator. After
receiving energy from the ultraviolet or visible light, the
photoinitiator undergoes a fragmentation reaction and transforms
into free radicals or cations which initiate the polymerizing
process or so-called curing process.
With no solvent to evaporate and no environmental pollutants, UV
coatings/inks have become the best green solutions for the industry
since the 80’s. Photoinitiator plays the most critical role in the
UV curing system thought the concentration is less than 10%. After
almost 2 decades’ of endeavor, Chitec has developed a very
comprehensive product spectrum encompassing visible light
photoinitiators, UV photoinitiators, free radical photoinitiators,
cationic photoinitiators, oligomeric photoinitiators, etc. and has
established a leading position in high-end applications such as 3D
printing, optical coating, solder mask and so forth.