| Titre : |
A second crosslinking strategy |
| Titre original : |
Hybrid blocked isocyanates combine different chemistries leading to enhanced properties |
| Type de document : |
texte imprimé |
| Auteurs : |
Richard Jones, Auteur |
| Année de publication : |
2001 |
| Article en page(s) : |
p. 48-53 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
The development of blocked isocyanates for thermally cured 1k polyurethane coatings strives to reduce the curing temperature, but simultaneously a good storage stability at room temperature must be kept. Hybrid blocked isocyanates combine chemically different blocking agents, thus avoiding some disadvantages of single systems, while maintaining the coatings performance. |
| Note de contenu : |
- Two different unblocking reaction mechanisms
- DEM blocked isocyanate solidifies
- Combinations of blocking agents to enhance stability
- Optimal OH : NCO stoichiometry is greater than 1.0 : 1.0
- Hybrid blocked isocyanates show a different molecular weight distribution
- Crosslinked structure for DEM/DMP hybrids differs chemically
- Cost effective formulations
- Comparison with conventional blocking agents
- Artificial weathering performance : Hybrids perform well
- Yellowing on overbake : Poor MEKO performance
- Acid Etch Resistance : Hybrids similar to MEKO
- Small amounts of DEM increase overcoat adhesion drastically |
| En ligne : |
https://drive.google.com/file/d/1E_Lq-ljZoyNCIdJtYxeK3sNk5BgwYbAp/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=10942 |
in EUROPEAN COATINGS JOURNAL (ECJ) > N° 9/01 (09/2001) . - p. 48-53
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A second crosslinking strategy in EUROPEAN COATINGS JOURNAL (ECJ), N° 9/01 (09/2001)
