The invention relates to novel bis-iminoazacyclo pentane polyols according to the formula given below, whereinR.sup.1 =H, alkyl or R.sup.4, whereby R.sup.4 is OH, hydroxyalkyl, hydroxyaryl or hydroxyaralkyl andR.sup.2 and R.sup.3 are independently of one another, OH, hydroxyalkyl, hydroxyaryl or hydroxyaralkyl which are obtainable by reaction of succinonitrile with a hydroxyalkylamine, to polyols obtained on the basis of such compounds, in which a polyether, a polyester or a vinylpolymer or combinations thereof are also incorporated, and to polymers in which said polyols are incorporated. Polyurethane foam in which 1-(hydroxyethyl)-2,5-bis-(2-hydroxyethylimino)-azacyclopentane is incorporated shows a higher mechanical strength and reduced inflammability, whilst the formulation has an increased reactivity. ##STR1##