Knowledge base

Non-transparent materials can not be laminated by means of radical photo cunng due to the fact that this system is based on a non-living polymerization. The dark cure of cationic UV systems however allows for an initiation of the polymerization and continuation of the reaction after radiation. Formulations can be designed to control this post cure

The technology of curing coatings, adhesives, inks etc. with UV light is common in the industry. With the improvement in photoinitiators and UV lamp technology further fields of applications will becovered in the future. In cycled processes UV-flash systems are an alternative to the standard continuous systems. These systems are smaller and lighter

Since the reduction of VOC is a main issue, radiation-cured coatings have quite recently entered the automotive market, with specific applications on plastic and metallic parts, in replacement of classical solvent based coatings. The article is dedicated to the scratch resistance of UV-cured clearcoats. The scratch resistance has been assessed by m

Rose Bengal (RB) is a versatile xanthenic dye which can be used as a photo-initiator of polymerisation in the presence of various additives such as an amine, an iron arene complex or ahydroperoxide. Previous works showed that this photoinitiating system is very efficient for the photo-curing of thick pigmented coatings usable as paints in the wood

To reach high matting grades on radiation curable lacquer films it is traditionally necessary to add high amounts of mailing agencies into the lacquer formulation. Disadvantageous, these will also influence the physical properties of the lacquer and its applicability and can cause inhomogeneous matting. High mailing grades without any matting addit

The work for this presentation was carried out over the last two years within the Corporate Research Department in cooperation with different Product Managements of the former Herberts Group, today DuPont Performance Coatings.The demand for scratch and chemical resistant clear coats has increased over the last years and is still growing. New cars,

In liquid crystal (LC) display, primary alignment of the LC molecule is generally performed on the polyimide thin film by mechanical rubbing. It has been, however, desired non-contacting method, what is called the rubbing free technique, because of many problems on the rubbing process such as evolution of dusts and electrostatics. In recent years,

Since its beginnings in the 1970s, radiation curing of coatings has developed to the point where today it is a universal crosslinking technology. In the wood-coating sector and in the graphics industry, radiation curing is already established and is continuing on a growth path.Whereas to start with the possibility of solvent-free application was th