2. Photoinitiators
To be effective, a photoinitiator must satisfy a number of criteria:
it must have high absorption in the emission range of the light source used, usually a mercury vapor lamp;
singlet and triplet excited states must have short lifetimes (a few nanoseconds) to avoid quenching by molecular oxygen or monomer;
ions or radicals from excited states must be produced with the highest possible quantum yield and be reactive towards the monomer group.
The various photophysical processes involved after absorption of a photon by an initiator molecule are shown schematically in figure 1 . The initiation rate is given by the relation...
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Photoinitiators
Light-curing resins
References
Theses
- - http://www.sudoc.abes.fr
- TOURÉ (M.L.) - Exposition UV spectrale [Texte imprimé] : instrumentation et modélisation. - Université Joseph Fourier (Grenoble) (2003).
- ...
Equipment
An industrial UV irradiation plant comprises three basic elements (figure 1 ):
a light source (S) fitted with a parabolic or elliptical reflector. This is usually a medium-pressure mercury vapor lamp, which can be doped with a...
Manufacturers. Suppliers
Non-exhaustive list
EFOS: acquired by EXFO http://www.exfo.com
IST METZ GmbH : http://www.ist-uv.de
Fusion UV Systems Inc: http://www.fusionuv.com
...Main users
There are many areas of application for light-curing resins. Users include
for graphic arts: SICPA : http://www.sicpa.com
for UV adhesives: Loctite: http:// www.loctite.com
for...
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