The invention relates to a method for producing a polyurethane foam involving the reaction of a polyisocyanate and a polyol in the presence of an expanding agent and particles. These particles can be obtained by reacting support particles with a functionalization reagent G, and G comprises groups G1 by means of which G can be chemically bound to the surface of the support particles, and G also comprises reactive groups G2 that react with the NCO groups of the polyisocyanate or with the OH groups of the polyol under the conditions of the polyurethane foam production. G1 and G2 can be the same or different. The invention also relates to a polyurethane foam that can be obtained according to this method and to products containing this polyurethane foam. The invention additionally relates to a composition containing a polyol and the aforementioned particles. Lastly, the invention relates to a composition containing a polyisocyanate and the aforementioned particles. Both of these compositions can be used in order to produce an inventive polyurethane foam.
