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Accelerated weathering of oligomers by UV-B / Inwhan Oh in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 210, N° 4666 (12/2020)

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inPOLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 210, N° 4666 (12/2020) . - p. 18-21

Titre :	Accelerated weathering of oligomers by UV-B
Type de document :	texte imprimé
Auteurs :	Inwhan Oh, Auteur ; Hak-Yul Kim, Auteur ; Sungseo Cho, Auteur ; Indrajit Bhattacharya, Auteur
Année de publication :	2020
Article en page(s) :	p. 18-21
Langues :	Anglais (eng)
Catégories :	Copolymère uréthane acrylate Essais de résilience Oligomères Photoréticulation Polymères -- Effet du rayonnement ultraviolet Polymères -- Détérioration Polymères aliphatiques
Index. décimale :	667.9 Revêtements et enduits
Résumé :	Ultra Violet (UV) energy curing is one of the fastest crosslinking techniques used to dry coatings. UV curable coatings are also one of the most environmentally friendly coating systems as they are typically solvent-free (extremely low VOC/HAPS). Oligomers being almost 100% solids (ppm level solvent residues) have low to medium average molecular weights. Hence, they are liquid at room temperatures. Some oligomers contain some monomers to help reduce their viscosity, to make it easy for the formulator to handle them. However, some industry players do not believe UV curing is really a good solution for outdoor durable coatings. Hence, Miwon Specialty Chemical Co Ltd (MSC) decided to study the performance of some its aliphatic urethane acrylates under accelerated conditions to determine their durability. This paper discusses the tests and the performance that can be achieved when certain well-designed oligomers are exposed to harsh conditions.
Note de contenu :	- UV curing - Weathering test equipment - Preparing the test - Exposure test and results - Table 1 : Description of oligomers - Table 2 : Results using ASTM G154 cycle B test for the five products - Table 3 : Measurements taken after 1500hr and 2000hr - Table 4 : Results after testing to ASTM G154 at 1000hr - Table 5 : Results after testing to ASTM G154 at 2000hr
En ligne :	https://drive.google.com/file/d/15yJ7l-CBWLmw0F4QT0uzIQzdG-z6gbGO/view?usp=drive [...]
Format de la ressource électronique :	Pdf
Permalink :	https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36740

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