Knowledge base

While Gel Permeation Chromatography (GPC) is a powerful tool for the characterization of polymers, it can be time consuming which makes it less desirable for quality control purposes. We are introducing a relatively new method called Flow Injection Polymer Analysis (FIPA) for the rapid characterization of materials used in the fiber optics industry

UV Silicone release coatings have been industrial for. more than ten years. However, their market share is still rather low in comparison with solventless thermal re!ease coatings. The st century should show an increase of UV curing silicone material sales; Indeed, worries over release instability with UV silicone systems are fewer and fewer with t

Real-Time FTIR spectroscopy was used to study the effect of temperature on the kinetics of UV curing from room temperature up to 160°C. Irradiation was performed at 313 rim to simulate the emission of a XeCI excimer lamp. Various acrylates and photoinitiators were used to study the influence of the viscosity and the effect of the initiator on the p

Free radicals are essential for successful UV-cunng but they can also give UV-formulators someserious problems if they are not controlled. I will consider the present knowledge and outline themajor precautions the UV-forrnulator has to consider in the endeavour to continuously improve theperformance of UV-systems, especially to improve the in-can s

         A wide variety of analytical techniques have been used over the years to aid research and development work in the field of UV curing. Many have come and gone but today two techniques have stood the test of time and are extensively used; real-time infrared spectroscopy 1 and photo 2 (Differential

The first efficient photoinitiators of the cationic polymerization were aromatic diazonium salts withanions of low nucleophilicity 1]. However, the poor thermal stabilility of the diazonium salts limitsmainly the use as photoinitiator for cationic systems. Nevertheless, in diazomicro films and printingplates 2] diazonium salts are thermostable over

Phenyl isopropenyl ketone was terpolyme— rized with styrene and n-butyl'acrylate. Clear400 am thick layers of the terpolymer on glass plates were found to be removed by brushing-offafter deep ultraviolet (DUV) exposure for 3—5 nun at room temperature or for 1 mm at 80—115't. 1.6 pm thick polymer layers were. removed by 3 times of repeated cycles of

Water-borne UV curable formulations comply with environmental and legislation constrains forvolatile organic compounds. The photoinitiator is one of the critical components of the coatingformulations. We developed a ready-to-use oil-in-water emulsion of the oligomeric, polyfunctional ahydroxyketone photoinitiator Esacure KIP 150. The emulsion is st