Hot-cured epoxy compound based on ED-20 resin and isomethyltetrahydrophthalic anhydride was modified with alkanolamines of different structures. The influence exerted by the structure of alkanolamines on the structure and operation characteristics of modified epoxy-anhydride compounds was examined. Introduction of alkanolamines decreases the gel and cure times and enhances the operation properties of cured epoxy-anhydride compounds. The best products were obtained with alkanolamines derived from ethylenediamine. Their introduction into epoxy-anhydride compounds enhances by a factor of 1.5-2 the elasticity, tensile strength at uniform extension, and impact resilience of the cured formulations.
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