Abstract: The present invention relates to a batch process for producing a polyurethane foam that comprises mixing (a) polyisocyanates with (b) at least one higher molecular weight compound having at least two reactive hydrogen atoms and (c) if appropriate low molecular weight chain-extending and/or crosslinking agents, (d) blowing agents comprising if appropriate water, (e) catalysts, (f) water-absorbing polymers, (g) if appropriate capsules containing latent heat storage media and (h) if appropriate miscellaneous additive materials, and reacting the resulting reaction mixture to form the polyurethane foam, wherein either the blowing agent d) comprises no water or if the blowing agent d) comprises water, blowing agent d) and water-absorbing polymer f) are only brought into contact in the course of the reaction mixture being formed. The invention further relates to polyurethane foams obtainable by such a process and to shoe soles comprising such a polyurethane foam.