Modification of polyurethane foams with 1,3,5-triazine ring and boron

Boric acid was hydroxyalkylated with glycidol and ethylene carbonate. The product of hydroxyalkylation of boric acid was used to modify oligoetherol obtained from melamine and propylene carbonate. The obtained mixture was further used to get polyurethane foams (PUFs) by reaction with diphenylmethane isocyanate in presence of water. The foaming with diphenylmethane isocyanate containing 30 % tri-functional isocyanates resulted in formation of polyurethane foams of enhanced thermal resistance and diminished flammability in comparison with analogous PUFs based on 1,3,5-triazine ring.