FLEXIBLE POLYURETHANE FOAMS HAVING IMPROVED LONG-TERM PERFORMANCE CHARACTERISTICS

The present invention relates to polyol mixtures containing (b1) at least one polyether polyol having a hydroxyl number of 10 to 60 mg KOH/g and a high ethylene oxide proportion, (b2) at least one polyether polyol having a hydroxyl number of 10 to 100 mg KOH/g, a low ethylene oxide proportion and at least 40% primary OH groups and (b3) at least one polyether polyol having a hydroxyl number of 10 to 100 mg KOH/g, a low ethylene oxide proportion and not more than 30% primary OH groups and b5) of 0.25 to 10 additional parts by weight of polyurea, relative to 100 parts by weight of the components b1) to b3), optionally contained as a component of a dispersion polyol on the basis of one or more of components b1) to b3). The invention further relates to a process for producing flexible polyurethane foams using the mixtures according to the invention, to the flexible polyurethane foams obtainable therefrom and to the use of the thus-obtainable flexible polyurethane foams as an upholstery element for furniture or as