| Titre : |
Aluminium trihydroxide (ATH) : a UV transparent filler for UV-curable coatings |
| Type de document : |
texte imprimé |
| Auteurs : |
Anthony A. Parker, Auteur ; E. S. Martin, Auteur ; T. R. Clever, Auteur |
| Année de publication : |
1994 |
| Article en page(s) : |
p. 39-46 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Charges (matériaux)
Hydroxyde d'aluminium
Réticulation (polymérisation)
Revêtements -- Propriétés optiques:Peinture -- Propriétés optiques
Revêtements -- Séchage sous rayonnement ultraviolet:Peinture -- Séchage sous rayonnement ultraviolet
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
Unlike other extenders, aluminum trihydroxide (ATH) absorbs very little ultraviolet radiation over the wave-length range which is commonly used to activate most UV photoinitiators (220 to 400 nm). This is demonstrated by comparing the total transmittance (diffuse and specular) of UV-cured polyurethane films with and without the use of ATH as an extender. Difference spectra between filled and unfilled systems show that ATH does not interfere with the transmittance of UV light. On the other hand, a comparable study with a silica-filled system indicates that a higher proportion of UV light is absorbed. Solid state 13C NMR and FTIR spectra of ATH-filled, silica-filled, and neat systems show that the final chemical components of the crosslinked polymer matrices are similar (...) |
| Note de contenu : |
- EXPERIMENTAL : Composition and physical properties of fillers - Coating application and curing - Film densities and effective polymer concentrations - UV/VIS spectroscopy of cured films - UV/VIS spectroscopy of powders - Solid state 13C nuclear magnetic resonance (NMR) of cured films - Fourier transform infrared spectroscopy (FTIR) of cured films - Differential photocalorimetry studies (DPC)
- RESULTS AND DISCUSSION : Effect of fillers on the degree of cure - UV/VIS measurements of cured films : total transmittance and absorbance - UV/VIS measurements of cured films : specular and diffuse transmittance - UV/VIS measurements of neat powders - Effect of particle size on the UV transparency of ATH |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18603 |
in JOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 66, N° 829 (02/1994) . - p. 39-46
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