Knowledge base

Dentin adhesives are used in restorative dentistry to achieve a strong bond 'between the filling composite and dental hard tissues (dentin and enamel). Besides the photoinitiator and solvent, such as water, ethanol and acetone or mixtures thereof, the currently used self-etching dentin adhesives contain different monomer components. The main compon

Organic coatings are well known to be sensitive to scratch, abrasion and chemicals. In these last few years, research was focused on the preparation of nanocomposite coatings which bring partial answers to these issues. One way to prepare nanocomposites is to use concentrated silica organosols where the continuous organic phase can be either monome

The photocurable compositions are based on the mixtures of components of various physicalproperties and chemical structures. The structure of the network formed during the curing isdetermined by the reactivity of the monomeric units and by the mutual solubility of the monomers and oligomers used. Bis-GMA 4-(2-hydroxymethacryloxypropoxy)phenyl]prOpa

The weather resistance of an exterior coating is one of the main properties required by theend-user. The backbone structure of several monomers and oligomers has been investigated andsubjected to accelerated weathering tests. This ongoing study has shown that most of these acrylates, which are free from light stabilizers, can stand more than 5000 h

Photoinitiated graft polymerisation remains of the most efficient methods to modify rapidly the surface properties of organic substrates. This technology has been successfully applied to various organic materials, in particular on the wood, to improve the weathering and chemical resistance. The photografted thin-layer proved to be very efficient pr

Cationic UV-curing systems based on cycloaliphatic-epoxides continue to progress across a widespectrum of end applications, Including metal decoration, flexographic printing, rapid prototyping and electronic applications. The present study has been aimed at identifying ways of achieving rapid and efficient photo-induced cationic polymerization of h

Recent advancements in hardware and software have enabled a new UV process management methodology based upon the establishment of UV process windows. Process windows are a toleranced set of critical parameters which establish where one's UV process works best. Operating within the windows optimizes productivity and reduces waste. Jim Raymont, among

The core value of UV curing is that it enables users to do things that otherwise would be impossible or not as economical or efficient. Thin coatings, typical printing inks and overprint varnishes, are particularly affected because oxygen replenishment is most effective in the few micrometers below the film surfaces. Well known are the benefits fro