[article]
| Titre : |
Addressing single-layer protective coatings : A new resin for improved direct-to-metal coatings has been developed |
| Type de document : |
texte imprimé |
| Auteurs : |
Goeffrey R. Webster, Auteur ; Gianluigi Cassin, Auteur ; Jens Duereth, Auteur ; Curt Cleven, Auteur ; Todd Wallis, Auteur |
| Année de publication : |
2018 |
| Article en page(s) : |
p. 42-47 |
| Langues : |
Anglais (eng) |
| Catégories : |
Anticorrosifs
Anticorrosion
Application directe sur le métal
Essais de brouillard salin
Fourier, Spectroscopie infrarouge à transformée de
Homopolymères
Métaux -- Revêtements protecteurs
Photo-oxydation
Polyacryliques
Polyesters
Résistance à l'hydrolyse
Résistance aux conditions climatiques
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
A great many DTM coatings have difficulty providing weatherability or corrosion performance or both. Direct-to-metal coatings formulated with resins made using 2,2,4,4-tetramethyl-1,3-cyclobutanediol not only are rugged and deliver bestin-class weathering and corrosion resistance but can also be a potential replacement for 2-coat systems. |
| Note de contenu : |
- Identifying a persistent problem
- A new solution
- Hydrolysis resistance
- Moisture barrier
- Corrosion resistance
- Weathering resistance
- Fig. 1 : 2,2,4,4-tetramethyl-1,4-cyclobutanediol monomer (TMCD)
- Fig. 2 : Comparison of hydrolysis of homopolymers
- Fig. 3 : Coatings - 36 day 50% H2SO4 exposure : PE coating with no TMCO ; centre : the same resin with partial replacement of the glycol by TMCO and 100% of the glycol replaced by TMCO
- Fig. 4 : Water vapour transmission rates (ASTM E-96) of a coating prepared with "Tetrashield PC4000" to a standard protective coating of acrylic polyol crosslinked with "Desmodur 3390"
- Fig. 5 : 500 hours ASTM B117 corrosion over shot blasted steel. 2,2,4,4-tetramethyl 1,4-cyclobutanediol 2K coating and commercial acrylic. For testing, the panels were removed from the salt fog chamber, allowed to dry for a minimum of 12 hrs., then immersedin hot tap water for 30 minutes followed by scraping with a steel spatula to remove all loose paint
- Fig. 6 : Xenon ASTM 2527 accelerated weathering of "Tetrashield" resins compared to conventional polyesters and commercial acrylics
- Fig. 7 : FTIR spectra of unweathered and weathered coatings showing the NH OH and CH stretch region
- Fig. 8 : Plot of POV vs. time in xenon for conventional polyesters, "Tetrashield" resins and conventional acrylics in refinish clearcoat formulations
- Fig. 9 : Rate of photo-oxidation by IR spectroscopy. Lower rate indicates better weathering
- Table 1 : Homopolymers prepared for hydrolysis testing |
| En ligne : |
https://drive.google.com/file/d/1ECUdCGhb8mphL0JaxP4UVC3GBRPnj39n/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31508 |
in EUROPEAN COATINGS JOURNAL (ECJ) > N° 12 (12/2018) . - p. 42-47
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