| Titre : |
Photoinitiator design for waterborne UV systems |
| Type de document : |
texte imprimé |
| Auteurs : |
Stephen R. Postle, Auteur ; Marika Morone, Auteur ; Angelo Casiraghi, Auteur ; Gabriele Norcini, Auteur |
| Année de publication : |
2018 |
| Article en page(s) : |
p. 19-21 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Absorption
Copolymère uréthane acrylate
Diodes électroluminescentes
Photoamorceurs (chimie)
Revêtements -- Séchage sous rayonnement ultraviolet
Revêtements en phase aqueuse -- Additifs
Solubilité
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
The great majority of applications for UV-curable inks, coatings, adhesives and the like cal for 100% solids formulations. The attraction is that there is no solvant to remove and consequently, no energy usage beyond the UV light required to cure (crosslink) the coated or printed formulation. There are, however, at least two circumstances where the use of a diluent for a UV formulation is advantageous. These are where rheological control - for very low viscosity and largely Newtonien systems - is paramount. ink jet and curtain coating applications are two of the most common. The other circumstance is where a very thin coating or ink is to be applied to the surface of a substrate. And the favoured diluent, in part for environmental reasons, is water. For ink jet, a major benefit of rheology control lies in the elimination of monomers from the formulation. Unreacted rnonomer would be a migration and odour risk in sensitive packaging, for example, whereas the higher molecular weight monomers do net pose the same issues. |
| Note de contenu : |
- Introduction : why waterborne UV ?
- Waterborne : water-based ; water-soluble ; water-compatible - What's in a name
- History of photoinitiators for waterborne UV curable systems
- Designining a water-compatible photoinitiator
- New photoinitiators for waterborne systems
- New photoinitiators : results and discussion : Water solubility - Absorption - Reactivity tests - Urethane acrylate at 65% in water
- Fig. 1. UV-Vis spectra at 0.1% w/w in acetonitrile
- Fig. 2. Percentage of double bond conversion at 1407 cm-1. Light source LED lamp (400 nm)
- Fig. 3. Percentage of double bond conversion at 1407 cm-1. Light source Hg lamp (160 W) |
| En ligne : |
https://drive.google.com/file/d/1ijP5pyc3eXtrMfxHOyfgjeYj82LnPCOG/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30522 |
in POLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 208, N° 4640 (04/2018) . - p. 19-21
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Photoinitiator design for waterborne UV systems in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 208, N° 4640 (04/2018)
