| Titre : |
Novel concept for low temperature curing powder coatings based on hyperbranched polyesters |
| Type de document : |
texte imprimé |
| Auteurs : |
Mats Johansson, Auteur ; Eva Malmström, Auteur ; Andreas Jansson, Auteur ; Anders Hult, Auteur |
| Année de publication : |
2000 |
| Article en page(s) : |
p. 49-54 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Basses températures
Copolymères greffés
Peinture poudre -- Séchage sous rayonnement ultraviolet
Polyesters
Polymères aliphatiques
Polymères cristallins
Polymères ramifiés
Réticulation (polymérisation)
Revêtements poudre:Peinture poudre
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
The concept of using hyperbranched polymers as scaffolds for solid thermoset resin applications is described. A series of semi-crystalline methacrylate-functional aliphatic polyesters has been synthesized and characterized for applications as solid thermoset resin, e.g., powder coating resins. The polyester resins have been crosslinked by UV irradiation producing either amorphous or semi-crystalline crosslinked films depending on the initial structure. The resins are based on hyperbranched aliphatic polyesters onto which crystalline linear aliphatic polyester chains have been grafted and end-capped with methacrylate moieties. The resins exhibit a rheological behavior suitable for low temperature curing powder coatings, i.e., films that can be readily formed and UV cured at temperatures below 80°C. |
| Note de contenu : |
- SYNTHESIS : General procedure for grafting of poly(epsilon-caprolactone) (epsilon-PCL) polyesters 1 and 2 exemplified by synthesis of P2G-epsilonPCL(DP=10),3 - General procedure for methacrylation of the hydroxy-functional polymers 3-6 exemplified by the synthesis P2G-epsilonPCL(DP=10)-MA - UV curing (crosslinking) of polyesters 7-10:
- CHARACTERIZATION TECHNIQUES : Rheology - Thermal characterization - Residual unsaturation - Microscopy - Photo DSC - Dynamic mechanical properties
- SYNTHESIS : Graphting of epsilon-caprolactone onto the hyperbranched polyesters - Methacrylate functionalization - Rheological and physical properties of polyesters 7-10 before crosslinking - Curing performance of resins 7-10 - Mechanical propertier of UV-cured films of resins 7-10 |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=17985 |
in JOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 72, N° 906 (07/2000) . - p. 49-54
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