| 摘要 |
Chlorofluorocarbon-free urethane-containing, soft-elastic moldings having a cellular core, a compacted peripheral zone and an essentially pore-free smooth surface are produced by reacting a) an organic and/or modified organic polyisocyanate with b) at least one relatively high-molecular-weight compound containing at least two reactive hydrogen atoms and, if desired, c) a low-molecular-weight chain extender and/or crosslinking agent, in the presence of d) a blowing agent, e) a catalyst, f) a crystalline, microporous molecular sieve having a cavity diameter of less than 1.3 nm and comprising metal oxides or metal phosphates, and, if desired, further additives and g) assistants, in a closed mold with compaction, expediently by RIN.
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