[article]
| Titre : |
New non-isocyanate moisture curable silylated resin for protective coating applications |
| Type de document : |
texte imprimé |
| Auteurs : |
Michael Seeber, Auteur ; Nayeem Soad, Auteur ; Vikram Kumar, Auteur ; Dean Kondos, Auteur ; Antonio Chaves, Auteur ; Martin Wusik, Auteur |
| Année de publication : |
2017 |
| Article en page(s) : |
p. 29-34 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Anticorrosifs
Anticorrosion
Dépôt par pulvérisation
Essais de résilience
Essais dynamiques
Flexion (mécanique)
Formulation (Génie chimique)
Isocyanates -- Suppression ou remplacement
Métaux -- Revêtements protecteurs
Photostabilité
Polyuréthanes
Réticulation à l'humidité
Revêtement monocomposant
SilylationLa silylation est l'introduction d'un groupe silyle, généralement substitué (R3Si–), dans une molécule.
Stabilité au stockage
Surfaces -- Nettoyage
Vernis
Viscosité
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
Two-component (2K) polyurethane coatings are widely used as the top layer of protective coatings systems to provide performance benefits, such as UV durability, flexibility and chemical resistance. However, these 2K products are coming under increasing scrutiny due to the presence of unreacted isocyanate in the uncured formulation. There have been efforts made ta develop non-isocyanate based coatings however, it is a challenge to do so while providing ail performance benefits of a 2K Polyurethane coating. A new non¬isocyanate moisture curable silylated resin for protective coating applications is discussed in this paper. This resin is targeted to enable the coating formulator ta develop a one¬component (1K) non-isocyanate coating that provides performance on par with the current 2K polyurethane coatings. Some of the key coating properties that were studied and are . discussed herein are UV durability, flexibility, corrosion resistance and chemical resistance. |
| Note de contenu : |
- EXPERIMENTAL : Metal cleaning process - Spray coating application - Design of experiments/formulation - Testing protocols - Chemical resistance test
- RESULTS AND DISCUSSION : Viscosity and shelf stability of Y-19243 resin and model formulations - Flexibility and impact resistance of Y-19243 resin - Outdoor durability and chemical resistance - Corrosion resistance
- TABLES : 1. Basic clear coat sample formulation - 2. Grind paste sample formulation using TiO2 and Y-19243 - 3. Grind paste sample formulation using TiO2 and Y-19243 with a pigment binder of 0.35 - 4. Cross hatch adhesion values after seven day cure at room temperature - 5. Pass/fail results for 3/4" Mandrel bend test on CRS substrates - 6. Summary of colour and gloss values before and after exposure to QUV-B weathering for eight weeks
- FIGURES : 1. Konig hardness values as a function of # oscillations vs room temperature cure time over 60 days - 2. Evolutions of viscosity (cP) as measured at two week time intervals after ageing in a 50°C oven. Measurements were taken of Y-19243 resin as produced, as well as model clear formulations - 3. Visual images of mandrel bend tests. A. Exp. clear, no catalyst B; Exp clear with catalyst ; C. Exp white, no catalyst, with catalyst ; E. Comm 1K-A ; F. Comm 1K-B ; G. 2K PU - 4. Frontal and reverse impact resistance values in lbs force for all model formulations and commercial controls. Panels were tested after 30 days of room temperature cure - 5. Chemical resistance ratings scale - 6. Visual representation of areas of cured films exposed to all solvents tested - 7. Corrosion resistance after 1500 hr exposure to NSS. a) Com. 1K-A ; b) Comm. 1K-B - c) Comm. 2K PU ; d) Exp white, no catalyst ; e) Exp white, catalyst |
| En ligne : |
https://drive.google.com/file/d/1LqialbhrHGYZelQtXxUle97cwrueSbAY/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29327 |
in POLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 207, N° 4635 (10/2017) . - p. 29-34
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