Taking the next step in fast curing 2K NCO technology / Francesca Fallani in SURFACE COATINGS INTERNATIONAL, Vol. 104.2 (03-04/2021)  

[article]  inSURFACE COATINGS INTERNATIONAL > Vol. 104.2 (03-04/2021) . - p. 130-135 Titre : Taking the next step in fast curing 2K NCO technology Type de document : texte imprimé Auteurs : Francesca Fallani, Auteur ; G. Fuerpass, Auteur ; Andringa (H.), Auteur ; B. Mulder, Auteur Année de publication : 2021 Article en page(s) : p. 130-135 Langues : Anglais (eng) Catégories : Agents dispersants (chimie) Durée de vie en pot Essais de brouillard salin Formulation (Génie chimique) Haut extrait sec Isocyanates Polyacryliques Polyols Réticulation rapide Revêtements bi-composant Vernis Index. décimale : 667.9 Revêtements et enduits Résumé : Obtaining an improved balance between drying time and pot life is an ever-ongoing challenge in 2K isocyanate coatings. In this paper, allnex presents technology that takes 2K NCO curing to the next level, shortening the drying time down to 1 hour at room temperature, while increasing the pot life. In addition, the open time can be tuned and early hardness and chemical resistance are significantly improved. Note de contenu : - Clear coat application performance - SETALUX FC medium solids acrylic polyols - SETALUX FC high solids acrylic polyols - Study of clear coat conversion and coating properties - DUROFTAL FC high solid polyester polyols for top coat application - Formulation advice - Table 1 : Comparison of application data of new FC technology with standard medium solids - Table 2 : SETALUX FC high solids grades - Table 3 : Comparison of application data of new FC technology with standard high solids systems - Table 4 : Comparison of TG and crosslinking density between a standard system and the new fast cure technology - Table 5 : DURFTAL FC high solids grades - Table 6 : Paint data and drying performances of DUROFTAL FC and SETALUX FC grades versus high solids acrylic references - Table 7 : Hardness development and MEK resistance of DUROFTAL FC SETALUX FC grades versus high solids acrylic references - Table 8 : Salt spray and humidity resistance data of red pigmented topcoat based on DUROFTAL FC 2828 - Table 9 : Top coat formulations based on DUROFTAL FC 9511/80BAC - Fig. 1 : Pot life-drying balance comparison of new Fast Cure technology with a standard medium solids system : the size of the circles correlates with the hardness measured 1h after curing for 30 minutes at 60°C - Fig. 2 : Pot life-drying balance comparison of new Fast Cure technology with standard high solids systems ; the size of the circles correlates with the hardness measured 1 hour after tack-free time at RT - Fig. 3 : Isocyanate conversion versus time determined with infrared spectroscopy - Fig. 4 : Salt spray testing on red pigmented topcoat based on DUROFTAL FC 2828 for 1000 hours - Fig. 5 : Impact of dispersant on pot life of top coat formulations based on DUROFTAL FC 9511/80BAC - Fig. 6 : Spider diagram summarising the advantages and special features of high solids fast cure resins En ligne : https://drive.google.com/file/d/1engh2Nu8Zn9NyaXRMIVrBoi1jPPEC-dD/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36000 [article]

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