Knowledge base

  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

Dendritic, polymers are,a new' ciass of polymer, characterised by: a'den'sely branched backbone and a large number of reaetive groups. 2 main characteristics of such a structure is the lack of entanglements and the low hydrodynamic volume resulting in a lower viscosity than Iinear 'or branched analogues: De.ndritic polymers have already shown speci

UV curable maleimide/vinyl ether blends were discussed in literature during the last years. Results ofbasic research were published which mainly contained RTIR spectroscopy, differential photocalorimetry, and the mechanism of radical formation. Partially, these results indicated high reactivity and low sensitivity to oxygen inhibition. Therefore, U

 Rapid and entire curing of thin films is still a challenge in modern coating industry. Since numerous new applications are developed regularly, formulations have to be adapted to give optimum performance. Selection of type of resin influences macroscopic characteristics of the cured formulation. Mechanical and physical properties such as hard