Polyol composition, resin premix and polyurethane foam

[PROBLEMS] To provide a polyol composition capable of improving flame retardancy while maintaining physical properties such as hardness of the polyurethane foam, a resin premix containing the polyol composition, and a polyurethane foam obtained using the resin premix provide. A resin comprising a polyol composition comprising one selected from polyoxyalkylene polyols or polymer polyols and a flame retardant, wherein the flame retardant is a specific ionic compound containing phosphorus and nitrogen. Polyurethane foam using premix. [Selection figure] None