[article]
| Titre : |
A formaldehyde-free additive of crosslinker for coatings on plastics |
| Type de document : |
texte imprimé |
| Auteurs : |
Jeanne L. Courter, Auteur ; Kuang-Jong Wu, Auteur ; Amy Essenfeld, Auteur |
| Année de publication : |
2007 |
| Article en page(s) : |
p. 125-134 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
The use of tris (alkoxycarbonylamino) triazine (TACT) in acrylic, epoxy, and polyester formulations is discussed with a variety of formulations chosen to illustrate critical aspects of working with this crosslinker and the properties that can be achieved. Forhydroxy-functional backbones, primary hydroxy functionality is superior to secondary hydroxy functionality. TACT is relatively insensitive to the presence of a wide variety of catalysts, making it suitable as a modifier for formulations consisting predominantly of hydroxyfunctional polymers. TACT is not only formaldehyde-free, but also brings enhanced performance such as improved acid etch resistance and accelerated weathering. Excellent latency which is indicated by a sharp onset of cure is shown in an infrared study. With epoxy-functional polymers and suitable catalysts, TACT can react at lower temperatures (also shown using an infrared study) indicating the potential of epoxy/TACT systems to be used in formulating two component (2K) coatings. Epoxy-TACT formulations are found to give excellent mar resistance and environmental etch resistance. The epoxy-TACT combination can be used to enhance formulations, for example, the humidity resistance of a polyester formulation containing TACT was improved using addition of aliphatic epoxy. |
| Note de contenu : |
- Crosslinking hydroxy-functional polymers : Backbone selection
- TACT as an additive : Crosslinking epoxy-functional polymers - Crosslinking hydroxy-functional polyesters - Hybric crosslinking
|
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11511 |
in PAINTINDIA > Vol. LVII, N° 10 (10/2007) . - p. 125-134
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