| Titre : |
Inventive routes for the preparation of waterborne acrylic polyols for 2K PU protective topcoats |
| Type de document : |
texte imprimé |
| Auteurs : |
David Vanaken, Auteur ; Denis Heymans, Auteur ; Félix Feng, Auteur ; Nathalie Havaux, Auteur |
| Année de publication : |
2022 |
| Article en page(s) : |
p. 19-22 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Dispersions et suspensions
Néodécanoate de glycidyle
Polyacryliques
Polyols
Polyuréthanes
Revêtements -- Finition
Revêtements bi-composant
Revêtements en phase aqueuse
Revêtements organiques
Revêtements protecteurs
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
The authors summarises all of the recent data published on producing waterborne acrylic polyols for 2K PU topcoats.
New regulations, increased awareness and the importance of environmental stewardship lead to a strongly increased demand for waterborne (WB) protective topcoats. However, matching the performance of solventborne (SB) two-component (2K) polyurethanes remains a challenge for resin and paint producers. Synthesis and formulation of primary or secondary dispersions are not straightforward.
For secondary dispersions, the removal of solvents from polyols prior to dispersion in water is technically challenging. The emulsion polymerisation process producing primary dispersions often poses problems of water-phase homopolymerisation of the hydroxyl monomers resulting in poor stability of the emulsions, high process grit and insufficient crosslinking of the final coatings.
Waterborne acrylic polyols (APO) for 2K urethane finishes have played an important role in enabling regulatory compliance in the industrial market, yet their synthesis can be difficult. This paper introduces two methods to produce high-performance solvent-free waterborne acrylic polyols using either glycidyl neodecanoate or its acrylated adduct. The performance characteristics of coatings made with these waterborne polyols are also demonstrated. |
| Note de contenu : |
- Waterborne technologies
- Waterborne APO secondary dispersions
- Performance of waterborne acrylic polyols based on glycidyl neodecanoate
- Waterborne APO secondary dispersions conclusion
- Waterborne hydroxy-functional emulsions
- Primary vs. secondary dispersions
- Novel OH-functional emulsions for high-performance WB 2K PU coatings
- Waterborne hydroxy-functional emulsion conclusions |
| En ligne : |
https://drive.google.com/file/d/1Koo1HDSSIlt1dDIXxIGDfBT_lXVQJr7D/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37868 |
in POLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 212, N° 4676 (08/2022) . - p. 19-22
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Inventive routes for the preparation of waterborne acrylic polyols for 2K PU protective topcoats in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 212, N° 4676 (08/2022)
