| 摘要 |
The present invention relates to a process for the production of a polyurethane foam, comprising the reaction of a polyisocyanate and a polyol in the presence of a blowing agent and of particles. These particles are obtained by reacting (1) carrier particles with (2) a functionalising reagent G, wherein G contains reactive groups G<1 >by means of which G can be chemically bonded to the surface of the carrier particles, and wherein G also contains groups G<2 >which, under the conditions of the polyurethane foam production, are not reactive either towards the NCO groups of the polyisocyanate or towards the OH groups of the polyol, and wherein G<1 >and G<2 >may be the same or different. This invention relates also to a polyurethane foam produced by this process and to products containing such polyurethane foams. The present invention also relates to a composition containing a polyol and these particles. The present invention also relates to a composition containing a polyisocyanate and these particles. Both the mentioned compositions can be used to produce a polyurethane foam according to the invention.
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