| Titre : |
Aqueous polyurethanes - polymer colloids with unusual colloidal, morphological, and application characteristics |
| Type de document : |
texte imprimé |
| Auteurs : |
R. Satguru, Auteur ; J. McMahon, Auteur ; J. C. Padget, Auteur ; R. G. Coogan, Auteur |
| Année de publication : |
1994 |
| Article en page(s) : |
p. 47-55 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Tags : |
'Peinture eau' Liant 'Uréthanne polymère' 'Dispersion colloïdale' Granularité Morphologie 'Formation film' Feuil 'Propriété mécanique' Dureté |
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
Aqueous polyurethane dispersions are becoming an increasingly important class of materials in the surface coatings industry. Because of the synthetic procedure employed in the preparation of aqueous polyurethanes, they differ significantly from typical emulsion polymers in terms of colloid stability characteristics and particle morphology. Fluorescence spectroscopy and small angle neutron scattering techniques demonstrated that the particles in a polyurethane dispersion are swollen with water. The consequences of this morphology in terms of the ability to combine low film forming temperature with good film hardness is discussed. The particle size distribution of aqueous polyurethanes was found to be broader than that of typical emulsion polymers. Results are presented which demonstrate how control over average particle size and colloid stability can be achieved in aqueous polyurethanes. |
| Note de contenu : |
- INTRODUCTION : Polyurethane dispersions
- RESULTS AND DISCUSSION : Cooloidal porperties-particle size distribution - Colloid stability - Particle size control - Particle morphology - Film formation and film hardness |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18608 |
in JOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 66, N° 830 (03/1994) . - p. 47-55
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