LAUSR

One-pot synthesis of oligoetherols with 1,3,5-triazine ring and boron atoms was described. A mixture of melamine and boric acid was hydroxyalkylated with glycidol and propylene carbonate. The obtained oligoetherols were suitable to obtain polyurethane foams of enhanced thermal resistance and decreased flammability in comparison with the foams based on 1,3,5-triazine ring only. Obtained polyurethane foams stand long-term heating at 200 °C. Moreover, the foams thermally exposed at 150 °C show increased compression strength in comparison with those before annealing. The flammability of foams decreases upon annealing at 150 °C. Furthermore, the foams annealed at 175 °C or higher temperature become nonflammable.