The kinetics of the noncatalytic reactions of isophorone diisocyanate with n propanol, isopro panol, 1,3 diazidopropan 2 ol, propargyl alcohol, and phenol in toluene in the temperature range from 20 to 90°C at the stoichiometric ratio of reactive groups has been investigated by IR spectroscopy. The apparent rate constants for the reactions of the aliphatic and cycloaliphatic isocyanate groups of isophorone diisocy anate with all of the alcohols have been measured. The activation parameters of the reactions of isophorone diisocyanate with n propanol, isopropanol, and 1,3 diazidopropan 2 ol have been determined. The data obtained are considered in terms of the alcohol structure and molecular organization of solutions.

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Kinetic features of the catalytic reaction of isophorone diisocyanate with triethylammonium salt of 2,2‐bis(hydroxymethyl)propionic acid, a hydrophilic agent for obtaining waterborne polyurethane, also with the model 1,1‐bis(hydroxymethyl)ethane and with physical mixture 1,1‐bis(hydroxymethyl)ethane‐triethylamine were studied using IR spectroscopy. The observed rate constant ratios of isophorone diisocyanate aliphatic and cycloaliphatic isocyanate groups interaction with the studied compounds were established, and the catalysis efficiency was evaluated. It was shown that a synergic effect is observed in catalytic systems based on dibutyltin dilaurate and triethylammonium carboxylates with regard to the reactivity of isophorone diisocyanate aliphatic group alone in the urethane formation reaction.

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