[article]
| Titre : |
Novel coatings based on mixtures of blown soybean oil and acrylate prepolymers |
| Type de document : |
texte imprimé |
| Auteurs : |
Pehong Ni, Auteur ; Frank N. Jones, Auteur ; Shoukuan Fu, Auteur |
| Année de publication : |
2001 |
| Article en page(s) : |
p. 57-64 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Tags : |
Matériau revêtement Peinture Liant Corps gras végétal Huile soja Soufflage Acrylate polymère Prépolymère Mélange Propriété physique mécanique Feuil Etude expérimentale |
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
Commercial blow soybean oil (BSBO) was shown by titration to contain a substantial level of (hydro)peroxy groups, presumably formed during the blowing process. Thus, BSBO can initiate free-radical polymerization. To explore the potential for film formation, BSBO was blended with (meth)acrylate monomers and/or prepolymers in different proportions. The monomers were trimethylopropane triacrylate esters (TMPTAE), 1,6-hexanediol dimethacrylate (HDDMA), and isobornyl acrylate (IBOA); the prepolymers were ethoxylated bisphenol A dimethacrylate (EBDMAE), and a hydrophobic aromatic urethane acrylate (HAUA).All blends required a catalyst (cobalt naphthenate) and temperatures of about 100°C to induce crosslinking and film formation. Blends with monomers gave formulations that could be applied with no added solvent, but film properties (pencil hardness, MEK double rub resistance, adhesion, and impact resistance) were not very good. Better film properties were obtained by blending prepolymers with BSBO and TMPTAE; these formulations required solvent for application, but VOC levels as low at 140 g/L were possible. FTIR spectra showed that free radical polymerization of the monomers and prepolymers occurred during film formation. Gel content studies indicated that part of the BSBO is incorporated into the crosslinked film, but a substantial fraction is not chemically bound to the network. |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5687 |
in JOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 73, N° 912 (01/2001) . - p. 57-64
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