Elastomers based on epoxyurethane oligomers, cured at room temperature

Abstract

New epoxyurethane oligomers (oligotetraurethane diepoxides) were synthesized on the basis of oligotetramethylene oxide diols of different molecular weight, various diisocyanates, as well as glycidol, and aminoethylpiperazine. On their basis, frost-resistant elastic cold-curing compositions were obtained. It was shown that varying the molar ratio between epoxyurethane oligomers and amine hardeners makes it possible to obtain elastomers with the deformation and strength properties that could be controlled over a wide range. It was proved by IR-spectroscopy that a various supramolecular structure was formed when different diisocyanates were used. High degree of microphase separation between soft and hard 50 blocks in elastomers synthesized on the basis of isophorone diisocyanate contributes to their higher strength properties. Methods of differential scanning calorimetry and mechanical analysis proved the possibility of the developed elastomers application in the Arctic and the Far North.