[article]
| Titre : |
Study of anionic polyurethane ionomer dispersant |
| Type de document : |
texte imprimé |
| Auteurs : |
Y. S. Huang, Auteur ; S. L. Ding, Auteur ; K. H. Yang, Auteur ; C. P. Chwang, Auteur ; D. Y. Chao, Auteur |
| Année de publication : |
1997 |
| Article en page(s) : |
p. 69-74 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Agents dispersants (chimie)
Dioxyde de titane
IonomèresUn ionomère est un copolymère thermoplastique « réticulé ioniquement ». La réticulation améliore la cohésion du polymère et la conductivité électrique.
Pigments inorganiques
Polyuréthanes
Revêtement émail:Peinture-émail
Revêtements -- Additifs
Revêtements en phase aqueuse:Peinture en phase aqueuse
Surfactants
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
Anionic polyurethane ionomers designed for use as dispersants in water-soluble acrylic baking enamels were synthesized, and their structures were confirmed by infrared analysis. In an aqueous media, the surface tension of the polyurethane ionomers with different ionic or mixed ionic groups was found to increase with increased concentration of ionic groups, because of the orientation of hydrophobic groups at the air-water interface. It was also found that viscosity in water is higher for a polyurethane ionomer with L-2,5-diaminovaleric acid hydrochloride than for a polyurethane ionomer with dimethylol propionic acid. Polyurethane ionomers with dimethylol propionic acid, p-amino benzoic acid, and mixed dimethylol propionic acid/p-amino benzoic acid were better dispersants for the wettability and dispersion of titanium dioxide (TiO2) in the water-soluble acrylic enamels. The degree of dispersion of TiO2 was found to improve with increased agitation time and anionic polyurethane ionomer concentration. In addition, polyurethanes with dimethylol propionic acid or p-amino benzoic acid or mixtures of these acids improved TiO2 dispersion stability in the baking enamel. |
| Note de contenu : |
- EXPERIMENTAL : Materials - Method of ionomer preparation - Paint preparation |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18282 |
in JOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 69, N° 872 (09/1997) . - p. 69-74
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Study of anionic polyurethane ionomer dispersant in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 69, N° 872 (09/1997)
