| Titre : |
Extending moisture-cure polyurethane binders with water : Water extension of reactive moisture-cure prepolymer binders has proven to be a practical technology with economic and performance benefits |
| Type de document : |
texte imprimé |
| Auteurs : |
Robert Cunningham, Auteur ; Jeff Stanley, Auteur ; John Lockard, Auteur |
| Année de publication : |
2013 |
| Article en page(s) : |
p. 22-29 |
| Langues : |
Américain (ame) |
| Catégories : |
Colles:Adhésifs
Liants
Particules (matières)
Polyuréthanes
Réticulation à l'humidité
|
| Index. décimale : |
668.3 Adhésifs et produits semblables |
| Résumé : |
Moisture-cure polyurethane adhesives, or more particularly, moisture-cure polyurethane binders, are used extensively to combine particulate materials into a solid form either by molding or other processes. These particulate materials can be diverse in physical characteristics ranging from sand and small stones to recycled tire crumb, flexible urethane foam scrap, wood, and fiber. The final form of the binder/aggregate mixture can range from permeable paving to rubber tiles, resilient flooring, and foam carpet underlayment.
One of the many challenges encountered in these applications is providing a reactive binder composition with the requisite physical properties that is low enough in viscosity to be rapidly and completely incorporated into the particulate mix. Another challenge is to provide a sufficient volume of binder to thoroughly and uniformly coat the surface of the particulate materials.
These requirements are conventionally addressed through the inclusion of non-reactive organic diluents such as aromatic and naphthenic process oils in the binder formulation at levels of 30-40% or more to provide both viscosity depression and increased physical volume. However, these non-reactive diluents also have adverse effects on the physical properties of the cured composite and, in the case of aromatic oils, are under regulatory scrutiny for possible toxicological problems.
Researchers wanted to develop an extender for moisture-cure polyurethane binders that would provide low viscosity, high physical volume, and minimal adverse effect on cured physical properties. Extension of moisture-cure polyurethane binders with water has proven to meet all of these criteria. |
| Note de contenu : |
- Binder properties
- Adding water
- In-situ emulsion
- Practical applications
- Experimenting for efficiency
- Meter/mix unit considerations
- Production trials |
| En ligne : |
http://www.adhesivesmag.com/articles/91824-extending-moisture-cure-polyurethane- [...] |
| Format de la ressource électronique : |
Web |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18317 |
in ADHESIVES & SEALANTS INDUSTRY (ASI) > Vol. 20, N° 4 (04/2013) . - p. 22-29
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