LAUSR

The method of obtaining polyurethane foams with 1,3,5-triazine ring and silicon and boron atoms, based on two oligoetherols, the one, synthesized from melamine diborate and propylene carbonate and the second, obtained from metasilicic acid, glycidol and ethylene carbonate, was elaborated. The physical properties of polyurethane foams were tested depending on composition of oligoetherol substrates mixture used. Obtained polyurethane foams have high compression strength and enhanced thermal resistance in comparison to classic rigid polyurethane foams. Long-term thermal exposure at 150–175°C results in increase of compression strength and reducing in flammability. The polyurethane foams exposed per month at 150°C show increase of oxygen index within 24.4–27.6, i.e. they are self-extinguishing. When polyurethane foams are exposed at 175°C, the oxygen index rise into 46.5–48.0, and the materials become non-flammable.