By Dr. Volker Petry, RadLab AG, Michael Gould, RAHN USA From an application perspective, the following report features guidance for the formulation of acrylate-based systems cured with excimer lamps. This work captures specific information helpful for attaining low gloss in UV-curable formulations, including oligomer, monomer and photoinitiator choices; cure speed; film … [Read more...] about Formulation Insights for Excimer Lamp Curing to Achieve Well-Balanced Film Properties
Raw Materials
X-Ray Cured Carbon Fiber Composites
By Liz Stevens, writer, UV+EB Technology The RadTech 2021 RadLaunch Special Unique New Technology Award for Cutting Edge X-ray-cured Carbon Fiber Composite System was presented to Anthony Berejka, Ionicorp, Huntington, New York, and Dan Montoney, Rapid Cure Technologies, East Syracuse, New York. Berejka and Montoney conducted in-depth studies, with financial support from the … [Read more...] about X-Ray Cured Carbon Fiber Composites
The Problem of High Viscosity Oligomers – Part 2
In the last edition of “Professor’s Corner,”1 a novel method for reducing the viscosity of a common acrylate-functional epoxy-based oligomer was introduced. This method was developed over several years by undergraduate students at the University of Houston-Downtown and involved the use of deionized water (DI H2O) as a diluent. The DI H2O was found to be more effective at … [Read more...] about The Problem of High Viscosity Oligomers – Part 2
The Problem of High Viscosity Oligomers – Part 1
People new to UV/EB polymerization quickly learn that most of the oligomers used in energy-curable formulations have very high viscosities, often more than 1 x 106 centipoise (cP). A classic example of such a highly viscous material is an acrylate-functional epoxy oligomer based on the diglycidylether of bisphenol-A (DGEBA). Figures 1 and 2 depict the molecular structure of … [Read more...] about The Problem of High Viscosity Oligomers – Part 1
Residual Building Block Chemicals in Raw Materials and Finished Printing Inks: A Risk Assessment
By Natasha Hausler Banke, Ph.D., INX International Ink Company Editor’s Note: The following received RadTech 2018’s Best Paper Award in the Professional division at the event held in May. Abstract The current guidelines for the use of raw materials containing residual building-block chemicals, such as bisphenol A (BPA), vary by country and governmental agency, while the … [Read more...] about Residual Building Block Chemicals in Raw Materials and Finished Printing Inks: A Risk Assessment