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In an attempt to bridge the technological gap between conventional and 100% UV inks for lithography, hybrid inks have been introduced onto the market during the last couple of years. In this paper, commercially available UV, conventional and hybrid sheetfed inks are compared in terms of formulation and performance. Ink properties like pigment wetti

It is evident from the titles of the two previous papers and from papers given at recent conferences 1] that there is renewed interest in the thiol-ene reaction. Whilst the chemistry of acrylates and methacrylates still serves the coatings industry well there is as search for other polymerisable systems that may offer some advantages. Undoubted att

The UV-technology as a complete solution from the raw material via the formulator to the end user has to be seen as a network of technical and political efforts for our common success. Not only the UV-unit technology counts but also substrate, pre-treatment, printing technology, curing, quality and price of the product are at least as important as

Cationic Radiation curable silicones have been complemented by additional silicones in order to achieve special needs such as very low and stable release in front of agressive adhesives. We have developed epoxy silicone polymers with release values starting very low and increasing slightly with stripping speeds. The new system is targeted for use o

The accelerating effect of Lewis acids in photoinitiator free UV grafting and curing involving charge transfer (CT) complexes with cellulose and polypropylene (PP) as representative substrates has been investigated. The data have been compared with the use of photoiriitiators (Pis) in these systems, also the combined effects of P1 and Lewis acid. T

We investigated in this work the impact of particle size, size 'distribution, and siUca loading on film properties of UV-cured hybrid organic-inorganic thin coatings. Commercial silica organols ofhexanediol diacrylate monomer (HDDA) containing monodisperse silica nanospheres (13, 25 and 50 nanometers) were mixed with a polyester tetraacrylate (PEA)

Diacrylates are effective and frequently used reactive diluents in radiation curing formulations.Selection of an appropriate reactive diluent requires specific attention on the effects onviscosity cutting power, but also a careful assessment of the toxic and irritation potential of thediacrylate. Attention is directed in this presentation from conv

The previous paper has set out the basics of the chemistry for UV curing, outlined thebenefits and shown some market trends. This paper will demonstrate the requirements for the curing equipment needed for efficient polymerisation of the ink or coating chemistry..