Knowledge base

              There are three primary reactions that define a polymerization: initiation, propagation, and termination. Of these three, the termination reaction is the aspect of crosslinking polymerizations that is least understood and of utmost importance to the properties of th

This manuscript focuses on our recent work involving photopolymenzations of monomers in a liquid crystalline environment. In particular, this effort concentrates on understanding the influence of a liquid crystalline medium and monomer segregation on polymerization kinetics and polymer structure. These studies are of considerable importance for pol

 A new class of bifunctional photoinitiators that contains in the same molecule differentphotoinitiating moieties has been developed. The best candidate of the class, LFC 1001, ischaracterised by high efficiency in radical polymerisation of acrylic coatings. The photoinitiator isparticularly suitable for UV curing of dark pigmented inks. One o

In this study, a photocurable system which contains dimethacrylated anhydride as a crosslinkerwas characterized. 2-Methoxyethyl methacrylate and methacrylic anhydride were photopolymerized in bulk to obtain a crosslinked network that maintains hydrolyzable anhydride linkages. This material provides the opportunity to degrade the crosslinks and obta

   UV/EB-curing acrylates are highly reactive. This is what makes them to cure rapidly.A possible side effect is that these products may cause skin irritation reactions in certain persons when they come (frequently) in contact with the skin. This is why in Safety Datasheets of these products as well as the formulations containing the

After the clear coat paint evolution of the last years that had the major target to drastically reduce the solvent emissions (figure 1), the employment of UV curable paints for car body paint application is being discussed increasingly.The employment of UV curable paints has numerous advantages, such as:o improved product quality,o increased produc

The present studies mark a breakthrough in photoinitiator development, in the sense that, under appropriate conditions, an abstraction type initiator shows a higher curing efficiency than a cleavage type photoinitiator. The studies reveal a remarkable discovery in the field of ultraviolet curing, viz., a synergism between maleimides and benzophenon

This study evaluates the economic impact of different technologies in the field of graphic arts.The comparison has been carried out between UV flexo printing and1. conventional sheetfed offset printing on carton board2. UV rotary letterpress printing of self-adhesive labels3. solvent based flexo printing for flexible packaging.Conclusions are drawn