| Titre : |
Hyperbranched polyesters : Basis for low temperature powder coatings |
| Type de document : |
texte imprimé |
| Auteurs : |
Mats Johansson, Auteur ; Eva Malmström, Auteur ; Anders Hult, Auteur ; Hans Claesson, Auteur |
| Année de publication : |
2002 |
| Article en page(s) : |
p. 26-33 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Basses températures
Polyesters
Polymères ramifiés
Revêtements poudre:Peinture poudre
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
A dendritic polymer is used as scaffolds for solid thermoset resins i.e. powder coatings. To make it crosslinkable there is a concept of attaching crystalline segments to a dendritic polymer and subsequent functionalization. The rheological performance of these structures makes it possible to reduce the film formation temperature to 80°C thus enabling heat sensitive substrates such as wood and polymers to be coated. The effects of structural variations on the rheological and mechanical properties are shown. The main factors affecting the final properties is the length of the crystalline grafts while the core structure induces only smaller differences in properties. The obtained resins are UV-curable with little or very low levels residual unsaturation present in the cured films. |
| Note de contenu : |
- Powder coatings : curing temperature of 150°C should be reduced
- Radiation curable systems need less heat
- Another way : low temperature curable hyperbranched polymers
- Hyperbranched polymers are synthetized
- Photopolymerization at 70°C
- High polarity end-groups increase viscosity
- Graft length dominates viscosity and degree of crystallinity
- Crosslinking and final film properties |
| En ligne : |
https://drive.google.com/file/d/1jKP_OIqA7J4lkv8kVKeJ2IGK7PTy3d9f/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=10726 |
in EUROPEAN COATINGS JOURNAL (ECJ) > N° 7-8/02 (07-08/2002) . - p. 26-33
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