[article]
| Titre : |
Morphology control in water-based biorenewable binders for decorative paints |
| Type de document : |
texte imprimé |
| Auteurs : |
Tijs Nabuurs, Auteur ; Maud Kastelijn, Auteur |
| Année de publication : |
2021 |
| Article en page(s) : |
p. 206-212 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
acrylique, Acide L'acide acrylique ou acide acroléïque ou acide prop-2-énoïque est un composé organique de formule brute C3H4O2 et de formule semi-développée CH2=CHCOOH. C'est un acide carboxylique et un alcène vinylique, et se présente comme un liquide incolore à l'odeur âcre.
L'acide acrylique et ses esters, les acrylates, sont utilisés dans la fabrication de matières plastiques, dans les peintures acryliques et dans divers autres polyacryliques qui ont de multiples usages.
Bilan des émissions de gaz à effets de serre
Biomatériaux
Copolymères
Enrobage (technologie)
Formulation (Génie chimique)
Liants en phase aqueuse
Morphologie (matériaux)
Résistance à l'humidité:Résistance à l'eau
Revêtements -- Propriétés mécaniques
Revêtements décoratifs:Peinture décorative
Revêtements organiques
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
There is a growing need for more sustainable coatings, where applying biobased raw materials is one of the important requirements. In this paper, the process of developing a biobased binder with a very interesting combination of mechanical properties, excellent water resistance and water absorption is described. Achieving a heterogenous particle morphology proved to be essential for achieving a good set of mechanical properties in these coatings. Effective phase separation between very - and equally - hydrophobic copolymer hard and soft domains can be realised by using significantly different acid concentrations in the two phases. The use of 1% acrylic acid in the soft phase and 5% in the high Tg phase resulted in a copolymer emulsion, which when cast into a film gave a film morphology of a soft matrix with high Tg protrusions. Applying this finding in an emulsion polymer containing 2-octyl acrylate and isobornyl methacrylate as the prime biobased monomers, resulted in a copolymer emulsion with a biobased content of 30%, based on 14C concentration, and a solids content of 49%. Surface hardness and blocking resistance were significantly increased, while the excellent elongation at break was not negatively compromised. Due to the more hydrophobic composition, the water resistance and water absorption properties were significantly better than those of the fossil fuel-based reference. The carbon footprint (CFP) of the thus-formed biobased resin is 17.2% lower than the fossil fuel-based reference, when compared conservatively, not considering the higher solid content of the biobased version. |
| Note de contenu : |
- Table 1 : Optional biobased monomers
- Table 2 : Phase specifications of the multi-domain particle morphology
- Table 3 : Biobased monomers used in multiphase copolymer emulsions, where in all experiments both phases contain 5% of acrylic acid (AA)
- Table 4 : Coating properties of biobased copolymer emulsions described in Table 3, in a clear formulation
- Table 5 : Coating properties of biobased copolymer emusions described in Table 3, in a clear formulation
- Table 6 : Coating properties of biobased copolymer emulsions containing 5% acrylic acid in the high Tg phase and 1% acrylic acid (EM7) and 5% acrylic acid (EM4) in the low Tg phase
- Table 7 : Carbon footprint results of the biobased copolymer emulsion compared with those of the fossil fuel-based reference in kg CO2 eq/kg emulsion |
| En ligne : |
https://drive.google.com/file/d/1NYhW6p4L1W54V8a_SiV8CZz4tsEXr8tr/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36002 |
in SURFACE COATINGS INTERNATIONAL > Vol. 104.3 (05-06/2021) . - p. 206-212
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Morphology control in water-based biorenewable binders for decorative paints in SURFACE COATINGS INTERNATIONAL, Vol. 104.3 (05-06/2021)
