Knowledge base

Coatings on wooden substrates for furniture, flooring and interior are a main application for radiation curing lacquers. An important target for development of UV coatings on wood is to increase adhesion. Superior adhesion leads to better whitening behaviour (coin test) and abrasion resistance. Guidelines to improve adhesion on wood are:- Swelling

A new three-component photoinitiating system (based on isopropyithioxanthone ITX, amine AH and abifunctional benzophenone - ketosulfone BP-SK photoinitiator) for acrylate polymerizationreactions was investigated through time resolved laser spectroscopy. Addition of ITX to BP-SK I AH clearly enhances the efficiency of the photopolymerization of clea

Team UV began as one of those wild ideas;... Why not coat a racecar using the latest incoating technology? What better way to promote the advances in this leading edge paintfinishing than on a slick, head-turning, high-tech part?The project has gained momentum and promises to provide a platform for showing offthe industries capabilities for some ti

In the last few years, work in several laboratories has been directed to the preparation of novel cationic photoinitiators, onium salts. The latter include new structures, such as dialkyiphenacylsulfonium salts (1), as well as more standard onium salts, like the diaryliodonium salts recently registered and placed on the market by Ciba. All these ne

Clear and pigmented IR I UV curable powder systems based on the photo-induced cationic polymerization of solid, bisphenol-A based epoxy resins in the presence of a chain transfer agent have been developed. By extruding the solid resins on standard equipment with pigments and a recently developed co-initiator, it is now possible to coat temperature

The growing need for high speed fabrication, increasing quality requirements, combined with reduced styrene emissionNOC levels in fiber reinforced composites and gel coats is being met with new light cure technologies. Critical to the success of light curing of composites is understanding' how lamps, photoinitiators and the fiber reinforced resin s

Emission from rare gas excimers such as , and exhibiting photon energies of 7.2, 8.5 and 9.85 eV, respectively, can be used to induce strong surface modifications of polymers. In particular, argon excimer shows a number of interesting features: the 9.85 eV photons are absorbed within less than 100 nm from the polymer surface giving rise to electron

Quenching of imidazoyl radical (Im ) formed in photoinitiator systems comprising an aminostyryl dye and a radical generating reagent by a 2-mercaptobenzothiazole(MBT): radical generating reagent;2,2'-bis(2-chlorophenyl)-4,4',5,5'-tetraphenyi-l, I '-bi-IH-imidazole (BI) in a poly(methyl methacrylate) film has been investigated by laser flash photoly