FOAMED POLYURETHANES HAVING IMPROVED FLEXING ENDURANCE PROPERTIES

The invention relates to a foamed polyurethane obtainable by mixing a) polyisocyanates, b) relatively high-molecular weight compounds having groups reactive toward isocyanate groups, c) solid particles, d) blowing agents, e) if appropriate ,chain extenders, crosslinking agents or mixtures thereof, f) if appropriate, catalyst and g) if appropriate, other additives, to give a reaction mixture and allowing the reaction mixture to react to completion, the proportion of chain extender being less than 6% by weight, based on the total weight of the components a) to f), the content of solid particles being greater than 15% by weight, based on the total weight of the components a) to f), and the average functionality of the relatively high-molecular weight compounds having groups reactive toward isocyanate groups being less than 2.5. The present invention furthermore relates to a molding comprising a foamed polyurethane according to the invention, a process for the preparation of the foamed polyurethane according to the invention and the use of a molding according to the invention as a shoe sole.