| 摘要 |
A foamed isocyanate-based polymer having a cellular structure and containing a superabsorbent material, the polymer being capable of: (i) absorbing at least about 20 times its weight of an aqueous fluid maintained at a temperature of from about 20 degree to about 25 degree C, and (ii) retaining at least about 20 times its weight of absorbed aqueous fluid which is bound to the superabsorbent material. A process for producing a foamed isocyanate-based polymer comprising the steps of: providing a substantially uniform mixture comprising an isocyanate, an active hydrogen-containing compound and a superabsorbent material, the superabsorbent material being capable of absorbing at least about 20 times its weight of an aqueous fluid maintained at a temperature in the range of from about 20 degree to about 25 degree C; adding to the substantially uniform mixture an aqueous blowing agent and a catalyst to form a reaction mixture; and expanding the reaction mixture to produce the foamed isocyanate-based polymer; wherein the active hydrogen-containing compound comprises from about 10 percent to 100 percent by weight of a hydrophilic active hydrogen-containing compound and from 0 to about 90 percent by weight 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.
|
