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The kinetic features of reactions of 1,6-hexamethylene diisocyanate with azide-containing oligodiols of the polyether nature and low-molecular-mass alcohols and diols containing primary and secondary OH groups in the presence of small amounts of cyclic azide-containing monomers have been studied. As evidenced by IR measurements, hydroxyl groups occur in the systems under study in the form of various associates involving system components. The activation effect of azide groups on the kinetics of urethane-formation has been established, and a feasible mechanism of this activation that relies on ideas concerning the role of associative interactions in the reaction system has been advanced.

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