| Titre : |
Ymer N120 : use in nonionic polyurethane dispersions |
| Type de document : |
texte imprimé |
| Auteurs : |
Henrik Bernquist, Auteur ; S. Ramakrishnan, Auteur ; Bhushan Saindane, Auteur |
| Année de publication : |
2012 |
| Article en page(s) : |
p. 73-76 |
| Langues : |
Anglais (eng) |
| Catégories : |
Agents dispersants (chimie)
Diols
Dispersions et suspensions -- Stabilité
Polymères en émulsion
Polyuréthanes
Propionique diméthylol, Acide
Revêtements
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
This article presents information concerning a nonionic diol that can be incorporated laterally in polyurethane backbones in order to achieve internal stabilization of polyurethane dispersions. The benefits of using the nonionic diol, in terms of tolerance of the resulting dispersion against electrolytes and shear forces, have been investigated. In addition, the tolerance of the resulting polyurethane coating against polar solvents has also been studied. The nonionic diol was observed to be an efficient dispersant, functioning well together with anionic stabilization in the form of Bis-MPA (dimethylol propionic acid). The lateral positioning of the nonionic segments was observed to greatly improve the dispersion stability and reduce the sensitivity of the corresponding polyurethane coating to solvents. A comparative study between nonionic & anionic PUD clearly shows that nonionic stabilization provides more electrolytic & shear stability. |
| Note de contenu : |
- PREPARATION OF POLYURETHANE DISPERSION
- PRE-POLYMER FORMULATIONS AND SYNTHESIS PROCEDURE - STAGE 1 : Synthesis procedure - Stage 2 : Chain extension, neutralization and dispersion - Stage : Neutralization and chain extension procedure
- TESTING PROCEDURES : Preparation of the polyurethane coating - Stability of the polyurethane dispersion - Electrolyte stability : testing procedure - Shear stability : testing procedure - Results : Stability of polyurethane dispersion - Properties of the polyurethane coating |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16263 |
in PAINTINDIA > Vol. LXII, N° 9 (09/2012) . - p. 73-76
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Ymer N120 : use in nonionic polyurethane dispersions in PAINTINDIA, Vol. LXII, N° 9 (09/2012)
