Knowledge base

Water absorption and diffusion in UV-cured polymer films were monitored and correlated with UVcurable resin composition and cured film's glass transition temperature. A spectroscopic method for the real-time, direct monitoring of acid and water diffusion in polymer films and coatings was developed. The method was used to monitor water diffusion in

Multivinyl monomers are photopolymerized to produce highly crosslinked networks with theadvantages of both a solventless system and a process that can be carried out under ambientconditions. Ideally, a priori knowledge of how changing cure conditions impact highly crosslinkedsystems is preferred. However, under most photopolymerization conditions,

 UV curing as a method for polymerising liquids, resins and solids at the push of a button is usedpredominantly for producing decorative, protective or information-carrying surfaces, i.e. for coatings and prints. If this method is also capable of giving high-quality products economically and in an compatible manner, the corresponding products

  Unlike the widespread uses of the UV-technique in the so called "narrow-web" area (< 20" printing width) greater printing width of mainly thin film materials only some UVinstallations are confessed. The unusual features of these materials and the high printing speed ('> 25OmImin) in the UV-printing processes shall be represented f

The performances of the novel bifunctional photoinitiator LFC 1001 (Esacure 1001) are reportedwhen used in combination of H-transfer co-initiators and in particular with amine and ethoxylatedacrylate co-initiators. Their combinations further increase the efficiency of the photoinitiator in theformulation. Use of thioxanthen-9-one derivatives in for

  The total electron density as well as the distribution within the carbon-carbon double bond in thedonor monomer will strongly influence the preference and ratio of "reactivity" towards alternatingco-polymerization, homo-polymerization and cyclo-addition reactions in typical acceptor (A) / donor (D) combinations. Furthermore, the rate of

Photoinitiators for radical polymerisations must induce a rather fast curing process. On the molecular level this means that they have to undergo an a-cleavage reaction with a high efficiency and the thus generated radicals have add to double bonds on a fast time scale. An acylphosphine-type photoinitiator is irradiated at an appropriate wavelength

Digital printing will be beneficial to the industrial printing market — labels & packaging, decorative printing — because lead times will be shorter, job lengths can be greater than the cylinder diameter and there is the added benefit of fully variable data printing. A high throughput is needed and the output has to be similar to traditional pr