| 摘要 |
The present invention relates to a process for the production if cellular polyurethane moldings, preferably sheetlike materials, having a thickness of 25 mm which can have, on one or more sides, a smooth, essentially compact surface, by sintering a mixture which contains A) one or more pulverulent thermoplastic polyurethanes which expediently have a melt flow index (MFI) of from 50 to 350 at 190.degree.C and a load of 212 N and have a Shore A hardness of from 60 to 98, and B) one or more blowing agents which are solid at 23.degree.C, at elevated temperature, usually at from 180 to 280.degree.C, using a mold.
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