Knowledge base

An original technique, real-time infrared (RTIR) spectroscopy, has been developed to analyse in situ UV curing reactions occurring in a fraction of a second. Cure profiles were directly recorded and the important kinetic parameters were determined quantitatively. The effect of various factors such as chemical composition, film thickness, light-inte

It has been shown that e.b. curing of acrylates occurs via the attachment of slow electrons to the acrylate groups which ubsequently give radical species leading to polymerisation. For poxy oligomers to be cured by . radiation it is advantageous if he formulation contains ionic photoinitiators eg. onium salts. vidence is presented that slow electro

The formulation of matt UV-curing coatings using modern matting agents is problematic primarily because of the high-solids nature of these systems. However, it has been shown that through careful formulation, UV-curing lacquers exhibiting good matting characteristics can be achieved. Although in such formulations the surface-treated micronised poro

Radiation curing is, nowadays, a well-established technology which develops and grows rapidly on an industrial scale. Originally, the most emergent applications were related to the UV-curing of coatings. Reprography (printing plates, integrated circuits, photoresists, solder masks) represents a second class of applications. Lastly, laser induced cu

Exterior clear coatings based on cationically UV cured epoxy formulations offer product advantages over UV acrylate systems in food packaging applications including low residual odor. This paper presents analytical results from migration and extraction tests for the specific determination of residual coating components. Experimental details and met

Cationic UV initiated polymerization is now a well established technology in the radiation curing market. Distinctive properties of cationic UV initiated polymerization include rapid cure response, absence of oxygen inhibition, post cure effect and high performance films. These characteristics have contributed to the development of the cationic tec

In this work the influence of irradiation and curing conditions on some properties of UV cured films was investigated. As starting materials two types of acrylic products, namely bisphenol-A-dihydroxyethyl-diacrylate and bisphenol—A-diglycidyl-ether-diacrylate, chosen as examples of slow and fast curing systems, were used. Firstly the curing kineti

A new a-cleavage photoinitiator is presented. This initiator is especially useful in pigmented systems and in various applications of the imaging area due to its absorption characteristics in the range between 350 and 400 nni. Application results demonstrating its outstanding performance are presented. Photodecoinpositionpathways are discussed base