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

[article]  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 [article]

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Accelerated weathering of oligomers by UV-B / Inwhan Oh in PAINTINDIA, Vol. LXXI, N° 10 (10/2021)  

[article]  inPAINTINDIA > Vol. LXXI, N° 10 (10/2021) . - p. 72-80 Titre : Accelerated weathering of oligomers by UV-B Type de document : texte imprimé Auteurs : Inwhan Oh, Auteur ; Hak-Yul Kim, Auteur ; Indrajit Bhattacharya, Auteur ; Sungseo Cho, Auteur Année de publication : 2021 Article en page(s) : p. 72-80 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Copolymère uréthane acrylate Essais accélérés (technologie) 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 VOCIHAPS). 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 the formulators job easy to handle them. However, some industry players do flot 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. The 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 - Wheathering test equipment - Preparing the test - Exposure test and results En ligne : https://drive.google.com/file/d/1d1nS47mEYceJ5_92Uu40Fc1W6Jo9VmH-/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36881 [article]

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