| Titre : |
Toughening epoxy adhesives : The addition of a polyurethane segment into the epoxy polymer improves strength and heat resistance for commercial epoxy adhesives |
| Type de document : |
texte imprimé |
| Auteurs : |
Jay A. Johnston, Auteur |
| Année de publication : |
2013 |
| Article en page(s) : |
p. 14-17 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Colles:Adhésifs
Epoxydes
Matériaux hybrides
Polyuréthanes
Résistance chimique
Résistance thermique
|
| Index. décimale : |
668.3 Adhésifs et produits semblables |
| Résumé : |
Due to their different physical properties, epoxy adhesives and polyurethane adhesives are sold into different segments of the adhesives market. Epoxy adhesives are targeted for applications requiring rigidity, solvent resistance and ultra-high-temperature resistance. Polyurethane adhesives are targeted for applications requiring toughness, processing flexibility, tunable cure rates, low-temperature cure and adhesion to many different substrates.
While the hybridization of epoxy and polyurethane technology is not a new concept for coating applications, the hybridization of adhesives is not as common. Commercial epoxy adhesives face several challenges that can be remedied by hybridizing these two technologies. The most important improvement to epoxies is a reduction in brittleness, which comes from the inherently high crosslink density of epoxy chemistry. |
| Note de contenu : |
- Epoxy strengthening methods
- Epoxy chemistry
- Blocked polyurethane prepolymers
- Strength development
- Softening point determination
- Testing modified adhesives
- Performance improvements |
| En ligne : |
http://www.adhesivesmag.com/articles/92072-toughening-epoxy-adhesives |
| Format de la ressource électronique : |
Web |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=19047 |
in ADHESIVES & SEALANTS INDUSTRY (ASI) > Vol. 20, N° 7 (07/2013) . - p. 14-17
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Toughening epoxy adhesives in ADHESIVES & SEALANTS INDUSTRY (ASI), Vol. 20, N° 7 (07/2013)
