| Titre : |
Waterborne 2K polyurethane topcoats |
| Type de document : |
texte imprimé |
| Auteurs : |
Cédric Le Fevere de Ten Hove, Auteur ; Christophe Steinbrecher, Auteur ; Denis Heymans, Auteur |
| Année de publication : |
2013 |
| Article en page(s) : |
p. 30-33 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Automobiles -- Revêtements:Automobiles -- Peinture
Diluants
Esters de glycidyle
Polyacryliques
Polyols
Polyuréthanes
Revêtements
Revêtements -- Finition
Revêtements bi-composant
Revêtements en phase aqueuse:Peinture en phase aqueuse
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
Conventional acrylic polyols for waterborne polyurethane topcoats are usually prepared via a solution polymerisation process, which is then followed by solvent removal. Thereafter, the resins are dispersed in water. This lengthy process requires high energy levels to distil the solvent and favours side reactions that negatively affect performance of the derived coatings.
This work demonstrates that high quality acrylic resins can be prepared in a very convenient, simple, one step process using glycidyl esters as reactive diluent. Resins were prepared with a solvent level of about 10% with either glycicyl neodecanoate or a novel glycidyl neoanoate. The latter provides resins with a higher glass transition temperature and, therefore, coatings with a faster hardness development rate. Derived 2K polyurethane clearcoats combine properties, such as excellent appearance, durability and drying speed. Further, glycidyl esters reactive diluents were combined with lower molecular weight polyesters to attempt to eliminate the need for any solvent during acrylics polymerisation. |
| Note de contenu : |
- THE POPPING OR BLISTERING ISSUE
- ACRYLIC AND HYBRID SECONDARY DISPERSIONS
- GLYCIDYL ESTERS-BASED ACRYLIC POLYOLS
- GLYCIDYL ESTER-BASED STAR POLYESTERS AND DERIVED HYBRIDS : Experimental part : polyols and clearcoats formulations and applications - Experimental part : clearcoats performance |
| En ligne : |
https://drive.google.com/file/d/1mIwZ4gp9hFaXa_zZ1N1NZz7of6v4LlS-/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18549 |
in POLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 203, N° 4584 (05/2013) . - p. 30-33
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