Polyetherols with 1,3-pyrimidine ring including both oxyethylene and oxypropylene groups were obtained in reactions of 6-aminouracil with ethylene carbonate and propylene oxide. The structure of the products was analyzed by spectral methods. Some physical properties of polyetherols were investigated. The polyetherols were used as polyol components to obtain polyurethane foams. Some properties of the foams such as apparent density, absorption of water, linear dimensions stability, thermal resistance, and compression strength were investigated. The foams obtained show an improved thermal stability. (c) 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 127: 1595-1600, 2013