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Imidazole catalysis in carbamate and polyurethane formation
Author(s) -
Jerussi Robert A.,
Orlando Charles M.
Publication year - 1972
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1972.070161112
Subject(s) - polyurethane , toluene diisocyanate , imidazole , catalysis , ethylene glycol , adduct , polymer chemistry , toluene , chemistry , isocyanate , carbamate , phenol , reaction mechanism , organic chemistry , materials science
Abstract Polyurethanes have been prepared from the reactions of the diimidazole and ditriazole adducts of 2,4‐toluene diisocyanate and ethylene glycol or polyols. Suitable formulations have been developed from these components which are useful in preparing polyurethane coatings and foams. Imidazole was established as an effective catalyst for the reactions of the diphenol adduct of 2,4‐toluene diisocyanate with polyols. Imidazolecatalyzed polyurethane formation from the phenol‐blocked diisocyanate occurs readily between 100° and 140°C. A mechanism for the catalytic activity of imidazole in these reactions is proposed.