| 摘要 |
<p>A foamed isocyanate-based polymer having a cellular structure and comprising a non-surface cross-linked superabsorbent polymer, the foamed polymer being capable of: (i) absorbing at least about 10 times its weight of a 0.9 wt./wt.% aqueous NaCl solution maintained at a temperature of from about 20° to about 25 °C, and (ii) retaining at least about 10 times its weight of absorbed aqueous NaCl solution which is bound to the superabsorbent polymer. A process for producing the foamed isocyanate-based polymer is also described. The process comprises the steps of: contacting an isocyanate, an active hydrogen-containing compound, an aqueous blowing agent, a catalyst and a non-surface cross-linked superabsorbent polymer, the superabsorbent polymer being capable of absorbing at least about 10 times its weight of a 0.9 wt./wt.% aqueous NaCl solution maintained at a temperature in the range of from about 20° to about 25 °C; and expanding the reaction mixture to produce the foamed isocyanate-based polymer. The active hydrogen-containing compound comprises from about 10 % to 100 % by weight of a hydrophilic active hydrogen-containing compound and from 0 to about 90 % by weight of a non-hydrophilic active hydrogen-containing compound. The foamed isocyanate-based polymer is ideally suitable for use in an absorption layer in a personal hygiene device.</p> |
