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Quantification of simultaneous solvent evaporation and chemical curing in thermoset coatings / Søren Kiil in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 7, N° 5 (09/2010)
[article]
Titre : Quantification of simultaneous solvent evaporation and chemical curing in thermoset coatings Type de document : texte imprimé Auteurs : Søren Kiil, Auteur Année de publication : 2010 Article en page(s) : p. 569-586 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Polyuréthanes
Réticulation (polymérisation)
Revêtements
solvants
Thermodurcissables
Transition vitreuseTags : Revêtement 'Formation de réseau' 'Piégeage solvant' 'Densité réticulation' Polyuréthane Bi-composant 'Température transition vitreuse' Index. décimale : 667.9 Revêtements et enduits Résumé : The mechanisms of simultaneous solvent evaporation and film formation in high-solids thermoset coatings are considered. The relevant phenomena, chemical reactions, solvent diffusion and evaporation, gelation, vitrification, network mobility restrictions, and crosslinking, are quantified and a mathematical model for a curing film is presented, which does not violate the local volume balance. For model verification, a previous investigation with a polyisocyanate and a polyol in methyl amyl ketone solvent, catalyzed by an organotin compound, was selected. In contrast to earlier modelling studies, simulations can match and explain detailed experimental data. For exemplification, simulations are used to analyse the influence of the various rate phenomena on the behavior of the solvent-based polyisocyanate/polyol film. DOI : 10.1007/s11998-010-9246-5 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-010-9246-5.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=9912
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 7, N° 5 (09/2010) . - p. 569-586[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 012448 - Périodique Bibliothèque principale Documentaires Disponible The effects of Areca catechu L extract on anti-inflammation and anti-melanogenesis / Kun-Kook Lee in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 21, N° 4 (08/1999)
[article]
Titre : The effects of Areca catechu L extract on anti-inflammation and anti-melanogenesis Type de document : texte imprimé Auteurs : Kun-Kook Lee, Auteur ; Jung-Do Choi, Auteur Année de publication : 1999 Article en page(s) : p. 275–284 Note générale : Bibliogr. Langues : Anglais (eng) Tags : 'Piégeage des radicaux libres' Hyaluronidase Tyrosinase 'Anti-mélanogénèse' Antioxydants 'Palmier à bétel' Index. décimale : 668.5 Parfums et cosmétiques Résumé : Ethanolic extract (CC-516) from Areca catechu L was prepared and its various biological activities were evaluated, CC-516 showed potent anti-oxidative, free radical scavenging, and anti-hyaluronidase activity. Anti-oxidative effect of CC-516 (IC : 45.4 μg/ml) was lower than butylated hydroxytoluene (IC : 5μg ml), but similar to tocopherol and higher than ascorbic acid. Especially, CC-516 exhibited relatively high free radical scavenging activity (IC : 10.2 μg/ml) compared to control. CC-516 inhibited effectively hyaluronidase activity (IC: : 416 μg/ml), showed inhibition in vivo on delayed hypersensitivity as well as croton-oil induced ear edema in mice when it was topically applied. These results strongly suggest that CC-516 may reduce immunoregulatory/inflammatory skin trouble. Also, from the results, we have elucidated that CC-516 showed anti-allergic and anti-cytotoxicity activity. The whitening effect of CC-516 shown by the inhibition of mushroom tyrosinase activity with IC of 0.48 mg/ml and of melanin synthesis in B16 melanoma cells. This study indicates that CC-516 is effective on anti-inflammatory/anti-melanogenesis, and can be used as a new agent for cosmetics. DOI : 10.1046/j.1467-2494.1999.196590.x En ligne : https://onlinelibrary.wiley.com/doi/10.1046/j.1467-2494.1999.196590.x Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=26485
in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE > Vol. 21, N° 4 (08/1999) . - p. 275–284[article]