| Titre : |
Use of reactable light stabilizers to prevent migration and to improve durability of coatings On plastic substrates |
| Type de document : |
texte imprimé |
| Auteurs : |
Nancy Cliff, Auteur ; Karlis Adamsons, Auteur ; Phillip V. Yaneff, Auteur ; Cindy Peters, Auteur ; Mouhcine Kanouni, Auteur |
| Année de publication : |
2005 |
| Article en page(s) : |
p. 371-387 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Tags : |
Etude expérimentale Durabilité Dégradation photochimique Vieillissement accéléré Pipéridine dérivé Triazine Absorbant UV Stabilisant Additif Relation formulation propriété Peinturage Procédé revêtement Matériau revêtu Elastomère Mélange polymère Oléfine Caoutchouc thermoplastique |
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
One of the challenges of coating plastic substrates for exterior automotive applications involves the tendency for light stabilizers, which inhibit UV degradation of the coating, to migrate out of the topcoat and into the underlying plastic substrate. The consequent depletion of the stabilizer from the topcoat could account for significantly poorer durability for coatings applied on plastic than on a nonpermeable substrate such as steel. These studies investigate the migration of both nonreactable and reactable UV absorbers (UVAs) and hindered amine light stabilizers (HALS) in fully formulated 2K urethane coatings applied on thermoplastic olefin (TPO) and steel substrates. Extensive migration of the nonreactable stabilizers occurs during accelerated exposure of the cured coating, and this migration correlates with poorer performance on TPO. Functionalization of the stabilizer with a group which covalently reacts into the coating will prevent much of this migration, and the improved degree of retention of the reactable light stabilizers in the topcoat correlates with improved performance on TPO substrates. In addition, stabilizer variables, such as the type and extent of functionalization as well as their chemical structure, have an effect on both the migration and performance of the stabilizers. |
| DOI : |
10.1007/s11998-005-0005-y |
| En ligne : |
https://link.springer.com/content/pdf/10.1007%2Fs11998-005-0005-y.pdf |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3727 |
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 2, N° 5 (01/2005) . - p. 371-387
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Use of reactable light stabilizers to prevent migration and to improve durability of coatings On plastic substrates in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 2, N° 5 (01/2005)
