“…In most cases, oligoesters serve as plasticizers of epoxy compositions and therefore are not chemically bonded with polymer grid in epoxy polymer. The resins of a different molecular mass [3,4,5] are being used as oligoester resins, as well as products of condensation of saturated and unsaturated dibasic acids or their anhydrides with glycols. However, such plasticization of epoxy compositions, despite the fact that it allows reducing the fragility of products, in general, does not improve their working properties.…”