[article]
| Titre : |
Synthesis and properties of imidazole-blocked diisocyanates |
| Type de document : |
texte imprimé |
| Auteurs : |
S. Subramani, Auteur |
| Année de publication : |
2002 |
| Article en page(s) : |
p. 61-70 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
Imidazole-, 2-methylimidazole-, and benzimidazole-blocked hexamethylene diisocyanate and isophorone diisocyanate were prepared and characterized by elemental analyses, IR and NMR spectroscopy. The structure-property relationship of these adducts has been established by reacting with hydroxyl-terminated polybutadiene (HTPB). The cure rate of the adduct increases from the imidazole to 2-methylimidazole and to benzimidazole blocked adduct. Also, the cure rate of the adducts based on hexamethylene diisocyanate is higher than those based on isophorone diisocyanate. Simultaneous TGA/ DTA results also confirm this trend. The gas chromatogram of the imidazole blocked isocyanate confirms that thermolysis products are blocking agents and isocyanate. The solubility of the adducts were carried out in polyether and hydrocarbon polyols, and it was found that the 2-methylimidazole and benzimidazole-blocked hexamethylene diisocyanate adducts show higher solubility than the rest. |
| Note de contenu : |
- Preparation of blocked diisocyanates
- Characterization methods of the blocked diisocyanate
- Thermal analysis
- GC analysis
- Gel time studies
- Solubility test |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12256 |
in PAINTINDIA > Vol. LII, N° 1 (01/2002) . - p. 61-70
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Synthesis and properties of imidazole-blocked diisocyanates in PAINTINDIA, Vol. LII, N° 1 (01/2002)
