Hydroxyalkyl derivatives of melamine were obtained by addition of melamine to glycidol. These derivatives were then used to obtain multifunctional oligoetherols by reaction with oxiranes and alkylene carbonates. The structure and properties of the oligoetherols were studied in detail. The oligoetherols were then used to obtain polyurethane foams of enhanced thermal stability. The foams showed marked thermal resistance at 200• C. The beneficial feature of the obtained foams was their increased compression strength after thermal exposure.

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A new method of preparation of oligoetherols containing perhydro-1,3,5-triazine rings from isocyanuric acid and an excess of glycidol, alkylene carbonates, or oxiranes is presented. The course of reaction was studied at various molar ratios of glycidol to isocyanuric acid. The structure of the products was established, and some physical properties were measured. The oligoetherols were demonstrated to be useful substrates for polyurethane foams of enhanced thermal stability.