[article]
| Titre : |
Effect of particle size distribution on the performance of two-component water-reducible acrylic polyurethane coatings using tertiary polyisocyanate crosslinkers |
| Type de document : |
texte imprimé |
| Auteurs : |
Denise E. Fiori, Auteur ; David Ley, Auteur ; Richard J. Quinn, Auteur |
| Année de publication : |
2000 |
| Article en page(s) : |
p. 63-69 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Tags : |
Peinture eau deux constituants Uréthanne polymère Acrylique dérivé Distribution dimension particule Durcissement Réticulant Isocyanate Propriété physique mécanique Feuil Etude expérimentale |
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
A two-component waterborne polyurethane system with a 250 g/l VOC has been formulated to meet the performance requirements of the automotive refinish market. This paper discussed an experimental study to develop a two-component water-reducible polyurethane coating using a tertiary aliphatic polyisocyanete crosslinker with dry times, appearance, and reactivity equivalent to a two-component solventborne system. The effects of acrylic polyol monomer composition, glass transition temperature (Tg), and hydroxyl concentration on drytime and ambient cure film performance have been determined. The effects of particle size distribution of the formulated coating on performance were examined. It was found that smaller particle size provides overall improved film propertics, i.e., jaster dry time, increased hardness, and faster development of solvent resistance. The relationship of both acrylic polyol composition and formulation variables on the particle size distribution are discussed. |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5823 |
in JOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 72, N° 902 (03/2000) . - p. 63-69
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