The advantages of 100 percent (i.e. water and solvent-free) UV curable coating materials comprise to: • high savings of energy during the drying and hardening process which are favourable from both an economic and ecologic point of view,
There are many reasons the formulator may want to use a filler, either to improve physical properties or to reduce cost, but in clear coatings there is not the luxury of choice open to other sectors of the coatings industry. Some areas where improvements may be required are
UV technology is continually evolving. The UV market hasn’t stopped growing from the early 60s up to now and since 2000, volumes keep increasing and have almost doubled to reach approximately 80.000 t in 2007.
Most of the functional properties of UV-cured coatings strongly depend on the conversion. However, the degree of the conversion, which is achieved by UV irradiation, is influenced by numerous variables.
Epoxysilicone chemistry has been described since the 1980’s and has been developed in order to obtain UV-curable coatings for different applications such as, release coatings, conformal coatings , optical fiber coatings, engine gasket coatings.
The use of UV and EB curing inks is growing in the European Graphic Arts market. Not only do they give excellent print quality but they are also solvent free, a huge benefit in this environmentally driven world.
Y.K. Jeong, G.H. Koo, Y.G. Jeong, J. Jang, 2007 Conference
UV-Curable formulations of Bis 2-(methacryloyloxy phosphate and 2-hydroxy-2-methyl-1-phenyl-prpan-1-one, as a difunctional monomers and a photoinitiator respectively, was applied to cotton fabrics for flame-retardancy.
K. Harada, T. Taniai, M. Nakada, K. Matuda, S. Takahara & K. Sugita, 2007 Conference
The Para-substituted benzene diazo compounds with electron-donating are used as the photo acid generator for micro resist, photosensitive emulsions for the screen printing resists and contrast enhancement lithographic materials.
The benifits of UV/EB technology are well known to industry and its end users, resuilting in its use in wide variety of coatings and inks. Furthermore, UV curable technology has played a significant role in traditional inks such as UV offset, litho flexo as well as screen inks.
Due to the numerous advantages of UV-printings different new applications were developed, for example also in the area of food contact materials. For these materials strong reglementations concerning human health exist.