| Titre : |
Film formation mechanism of two-component waterborne polyurethane coatings |
| Type de document : |
texte imprimé |
| Auteurs : |
Charles R. Hegedus, Auteur ; Andrew G. Gilicinski, Auteur ; Robert J. Haney, Auteur |
| Année de publication : |
1996 |
| Article en page(s) : |
p. 51-61 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Coalescence (Sciences physiques)
Dispersions et suspensions
Formation de film
Isocyanates
Polyuréthanes
Réactions chimiques
Revêtements bi-composant:Peinture bi-composant
Revêtements en phase aqueuse:Peinture en phase aqueuse
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
Two-component (2K) waterborne polyurethane coatings are a new technology which has been demonstrated in a number of heavy duty applications. They exhibit performance properties equivalent to 2K solvent-borne polyurethanes, with the advantage of reduced volatile organic compounds (VOCs). Although the use of these systems has been demonstrated successfully, the details of their film formation mechanism have not been established. The objective of this work was to propose and confirm the film formation mechanism of these systems. A dynamic series of interrelated events which occur during the process was identified using a number of analytical techniques to study two isocyanate/ hydroxyl functional dispersion systems. The mechanism is presented in terms of an event timeline that chronicles the critical events which occur prior to and after application of the coating. Film property development after application also was evaluated and these results were analyzed in terms of the proposed film formation mechanism. |
| Note de contenu : |
- BACKGROUND ON FILM FORMATION
- PROPOSED FILM FORMATION MECHANISM FOR 2K WATERBORNE POLYURETHANE COATINGS
- EXPERIMENTAL : Materials and coating preparation - Equipment and procedures
- RESULTS AND DISCUSSION : Particle coalescence in the admixed state - Isocyanate reaction in the admixed state - Evaporation of volatiles and particle coalescence after application - Isocyanate reaction afetr application - Development of film integrity |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18310 |
in JOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 68, N° 852 (01/1996) . - p. 51-61
Aller sur edunet
Accueil
Ajouter le résultat dans votre panier Affiner la rechercheFilm formation mechanism of two-component waterborne polyurethane coatings / Charles R. Hegedus in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 68, N° 852 (01/1996)
