Abstract
By mixing oligoetherols with 1,3,5-triazine rings and silicon atoms, polyol suitable for the preparation of rigid foam polyurethanes were obtained. The physical and utility properties of the obtained foam as well as bulk density, water absorption, dimensional stability, thermal conductivity, heat resistance and fire properties were examined. It has been found that it is characterized by improved mechanical strength, heat resistance and a reduced rate of smoking compared with conventional rigid polyurethane foams. During the prolonged heating of the foam at a temperature of 150-200°C its compressive strength increases. The foam subjected to exposure at 150°C and at 175°C during the month becomes self-extinguishing and non-flammable respectively
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