Knowledge base

Radiation curing is a well established and highly efficient method for crosslinking of coatings, printing inks 1 Photoinitiators 2 the key component in such systems have a great influence on storage life, curing rate and curing depth, but also on double bond conversion (DBC) and surface cure. Among the large group of P1 structures, hydroxyalkyiphen

Radiation curing is a well established and highly efficient method for crosslinking of coatings, printing inks etc.' Photoinitiators 23 the key component in such systems have a great influence on storage life, curing rate and curing depth, but also on double bond conversion (DBC) and surface cure. Among the large group of P1 structures, benzophenon

In the UV-curable formulations the most important component is very often the oligomer. Its choice exercises the control over some chemical and physical characteristics affecting the properties of the UV-cured materials, such as ,) gloss, ii) chemical resistance, iii) scratch resistance, ii,) mechanical resistance and non-yellowing 1]. These proper

UV-cationic curabTe silicone release coatings, which are based on cycloaliphatic epoxy-functional polydimethylsiloxane (CE-PDMS) in combination with onium salts, can be counted as well-established commercial products. Despite their good performance, such as not subjecting to oxygen inhibition and high throughput based on their high curing speeds, t

The role of multicomponent photoinitiating systems - based on various combinations of a bis imidazole derivative, an aminobenzophenone, an iodonium salt and an amine - in the photopolymerization of an acrylate formulation under light irradiation at 365 nm, has been investigated. Two photoinitiation processes occur a direct process where the light i

Fluoropolymers represent a group of rather specialized polymeric materials. The chemistry of the majority of fluoropolymers is derived from compounds used in the refrigeration industry.

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