Knowledge base

The present studies mark a breakthrough in photoinitiator development, in the sense that, under appropriate conditions, an abstraction type initiator shows a higher curing efficiency than a cleavage type photoinitiator. The studies reveal a remarkable discovery in the field of ultraviolet curing, viz., a synergism between maleimides and benzophenon

This study evaluates the economic impact of different technologies in the field of graphic arts.The comparison has been carried out between UV flexo printing and1. conventional sheetfed offset printing on carton board2. UV rotary letterpress printing of self-adhesive labels3. solvent based flexo printing for flexible packaging.Conclusions are drawn

Dendrimers and hyperbranched polymers have received considerable attention during the recentyears. Theoretically the concept of highly branched polymers was initially proposed in the early1940's by Flory and Stockmayer, but ittook until 1980 -1990 before the first synthesis ofdendrimers was presented by the research groups of Tomalia, Vogtle, Webst

Because of the wide array of industrial and scientific applications for crosslinked polymers formedby photopolymenzation, understanding of the kinetics of multifunctional monomers and resulting material properties is essential. Primary cyclization, i.e., when a pendant double bond reacts with a radical on the same chain, causes microgels and hetero

The intention of this paper is to discuss in some detail factors which determine camphorquinone (CQ)Iamine (AMH) photoinitiated polymerization. Emphasis is placed on the rate and course of radical reactions. CO can photoinitiate polymerization itself, however, at low speed and poor efficiency. In order to accelerate the photopolymerization, amines

An industrial tolylcumyliodonium- tetrakis pentafluorophenylborate , commercially namedRhodorsil ® Photoinitiator 2074 , was developed by Rhodia 1] The objective was to give analternative to solventless release silicone coatings . .J.CRIVELLO and other company 2] hadalready introduced cationic commercial systems in the mid-eighties.Cationic polymer

With this background paper, the Federal Environmental Agency offers a comprehensive introductionto and overview of the chemical processes behind the occurrence of summer smog, the effects ofozone on human health and the environment, as well as the measures which are, in the view of theFederal Environmental Agency, necessary to combat summer smog.

             Over the past decade, UV-radiation curing has found an increasing number of industrial applications because of its unique advantages, mainly solvent-free formulations, high cure speed and ambient temperature processing. One of the important fields where UV-curing has been