Knowledge base

A new development in photoinitiators' technology is the availability of difunctional derivatives. Due to their chemical structure, these photoinitiators combine reactivity similar and in some cases better than the monomeric ones with the solution of the unwanted characteristics of conventional products, such as the migratability and release of smel

The UV-radical polymerisation process can be improved under oxygen reduced conditions in double respect: With obviously reduced UV-power it becomes possible to print extremely heat sensitive substrates in UV-sheetfed machines. With UV-power, which is todays state-of-the-art, the working under oxygen reduced conditions offers possibilities to the fo

All industrial business has an impact on our heaJth and environment in some way or other. Coatings are no exception. The main purpose of the coatings is to contribute with a positive environmental impact by adding aesthetic value and protecting the surface. We all have a responsibility for our products' impact on the environment during their whole

  All the reactants were obtained from Aldrich. The monomer was purified by column chromatography before use. Reaction rate profiles and conversions were determined by isothermal differential scanning calorimetry. Throughout the experiments the DSC unit was operated isothermally at 40 ± 0.01°C. The 10-mg samples were polymerized in open a

A broad and novel array of UV-curable pressure-sensitive adhesives from Henkel now combine many of the virtues of familiar water- and solvent-based adhesives formulations plus the advantages of hotmelts.The principle of UV curing has been known since the Seventies. However, it was not until theintroduction of new raw materials, in the mid-Nineties,

In recent years UV equipment manufactures have responded to the challenges presented by the use of thinner films in the label and packaging industries and the heat management issues that needed to be addressed to permit successful printing quality to be achieved. Continued profit pressure from 'end users and retailers is driving the supply chain in

UV curing systems for industrial applications have been in use for the last 12 years, mainly forflat surfaces in the furniture and flooring industries. Solvent free (100% solid) lacquers areused in these applications and are traditionally applied by rollers. In the last few years, new UV lacquers have been developed that permit more complex 3- dime

Photo-induced acid-catalyzed crosslinking systems have been widely studied by many workers 1].The highly sensitive photocrosslinking materials can be used as negative-type photoresists, coating materials and printing materials. Epoxy/phenolic novolac blends are one of the most useful thermosetting systems which are also known to be cationically or