Knowledge base

As previously reported, a new class of amine synergist/coinitiators has been developed for use with type II photoinitiators, such as benzophenone. Traditional amine synergists (ethanolamines and amine acrylates) provide for good cure, but are deficient in some performance areas, such as blushing, discoloration of pigments and extractables. This new

UV coatings are predominantly used in series production of flat substrates. UV curing in a carbon dioxide atmosphere effectively reduces the inhibitory effect of oxygen. Improved curing becomes possible with minimal expenditures of energy and extra equipment. Basic kinetic research in this context demonstrates the expanded scope of procedural and p

In the past decades water based UV curing coatings have been developed based on a wide variety of chemical concepts Binders are being used based on a.o. polyurethanes, polyesters, andpolyacrytates Usually the poJymers are modified with ethylenically unsaturated groups, but in a few cases there is no covalent bond between the polymer and the ethylen

Everywhere you go today you hear the same thing, "Faster-Better-Cheaper is needed by all of ourcompanies to survive." This is not only true of our businesses and processes but also with our products and how our products help to make our customers products and operations better. Also, the rate of change continues to accelerate. Alkyds and lacquers d

Photochemical reactions of quaternary ammonium salts (QASs) bearing phenacyl groups andthiocyanate anions were investigated, and their performance as a catalyst for curing of epoxides was demonstrated. Upon UV-irradiation, QASs having thiocyanate anions generated amines, whichinduced a transformation of resulting thioisocyanates into oxazole-2-thio

In this paper, new techniques for the investigation of primary processes involved in photopolymerisation reactions are presented. Experimental techniques such as nanosecond time-resolved FTIR or laser induced photoacoustic calorimetry are discussed with respect to their potential applications for the investigation of photopolymerization processes.

Radiation curing is a well established technology, nevertheless tuning of the various components inthese formulations to fit particular applications is still a challenge. Therefore, a lot of research hasbeen devoted in the past decade to optimize the key component in such systems, the photoinitiator(P1). The drawback of conventional P1 systems is t

in this study, the influence of UV light intensity (Irradiance, lo) from different UV irradiators wasevaluated with respect to the depth profile (Cd) of double bond conversion in acrylate basedformulations. The UV irradiators evaluated in this study include conventional arc lamps, fluorescentlamps and microwave powered lamps. The investigation was