Titre : |
Biobased polyol with self-crosslinking functionality |
Type de document : |
texte imprimé |
Année de publication : |
2022 |
Article en page(s) : |
p. 30-33 |
Langues : |
Américain (ame) |
Catégories : |
Auto-réticulation Composés organiques -- Synthèse Copolymère diacétone acrylamide Isocyanates Polymères -- Synthèse Polymères en émulsion Polyols Polyuréthanes Réactivité (chimie)
|
Index. décimale : |
667.9 Revêtements et enduits |
Résumé : |
The need for green and environmentally safe coatings creates an opportunity for biobased raw materials. Vegetable oil polyols (VOPs) are the major source of biobased raw materials for making polyurethanes.
Despite their wide commercial availability, they have not been utilized for making water-based polyurethane (PU) coatings, because, VOPs have no performance-enhancing functional group in the molecular architecture. Therefore, they are unable to meet the stringent corrosion-, UV-, and solvent-resistance performance requirements.
In this short communication, we present a new class of biobased polyol with a crosslinking functional group that is free from toxic chemicals and has superior performance. This is achieved by reacting a keto acid with a glycidyl functional fluids derived from biobased sources. We also present the utilization of the polyol in making water-based polyurethane dispersion (PUD). |
Note de contenu : |
- Synthesis of the polyol
- Properties of the polyol
- Reactivity of the polyol towards isocyanates
- Application of the polyol in making self-crosslikable water-based polyurethane dispersion
- Scheme 1 : Synthesis of 2,3-dihydroxypropyl levulinate (Levupol-G)
- Scheme 2 : Synthesis of Levupol-S from levulinc acid and epoxidized soybean oil
- Table 1 : Physical properties of Levupol-G and Levupol-S
- Table 2 : Properties of PUD derived from Levupol-G
- Figure : Chemical structure of diacetone acrylamide |
En ligne : |
https://drive.google.com/file/d/1fGBbUe12_u91fZXjDBS5ubrhJUckQdfH/view?usp=drive [...] |
Format de la ressource électronique : |
Pdf |
Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37169 |
in COATINGS TECH > Vol. 19, N° 1 (01/2022) . - p. 30-33