Knowledge base

Electron beam (EB) induced polymerization of diglycidylether of bisphenol A (DGEBA) in the presence of a diaryliodonium salt (DAIS) was studied by FTIR spectroscopy and by dynamic mechanical thermal analysis (DMA). The obtained results allow to draw the gradual increase of the temperature for the network thermomechanical transition (Ta, associated

 From the inception of the automotive coatings industry in the early 1900's, through the 1950's, the coatings utilized by the automobile manufacturers to paint new vehicles was essentially the same technology used to repair and refinish those vehicles. Later, in the 1960's with the increased use of chemical crosslinkers, original equipment man

The photopolymerization of model clear coatings for wood applications in the presence of photoinitiating systems under UV and visible light has been investigated. The effect of the phenoliccompounds found in wood extracts, especially quercetin, on the final properties of the coating and the influence of various parameters have been discussed.

The functional properties of UV- and EB-cured coatings strongly depend on the final conversion of the acrylic double bonds which is achieved during irradiation. For instance, scratch and abrasion resistance depend on the hardness of the layer which is directly related to the degree of cure. Similarly, a high weathering resistance of coatings for ou

The performances of UV-cured thermoforming inks for plastic surfaces are usually based both on the high photopolymerization rates and good film-forming properties, maintained also under high elongation at high moderately temperatures. The industrial process is initially based on the UV-curing reaction of an ink on the thermoplastic material surface

This article illustrates the optimization of industrial UV curing processes by means of real-time infrared spectroscopy (RTIR). Using an experimental setup designed to follow the kinetics of photochemical reactions on a millisecond time scale, the UV curing of various acrylate systems was investigated. The influence of parameters such as the type o

State-of-the-art technology today stands for bonding as the joining technique in construction andconnection technology for fibre and integrated optical sensors. Therefore, mainly commerciallyavailable adhesive systems are used.The task for fibre-chip-coupling was to develop a suitable adhesive system to fulfil the specialrequirements of coupling th

A new generation of low cost electron beam dryers operating in the 70 kV — 110 kV range is nowcommercially available. Electrons accelerated at these low energies are especially suited for curingsolvent-free inks, coatings and laminating adhesives that contain no photoinitiators. The new electron beam (EB) dryers are very compact, allow high process