Superabsorbent hydrophilic isocyanate-based foam and process for

Details Superabsorbent hydrophilic isocyanate-based foam and process for Superabsorbent hydrophilic isocyanate-based foam and process for

1995-03-30

1997-10-07

Sergent, Rabon

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Cellular products or processes of preparing a cellular...

521 52, 521 99, 521125, 521134, 521137, 521139, 521155, 521163, 521170, 521172, 521174, 521905, 604358, 604369, 604372, 604374, 604376, C08J 904, C08J 908, A61F 1315, A61L 1526

Patent

active

056749171

ABSTRACT:
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% to 100% by weight of a hydrophillic active hydrogen-containing compound and from 0 to about 90% by weight a non-hydrophillic active hydrogen-containing compound. The foamed isocyanate-based polymer is ideally suitable for use in an absorption layer in a personal hygiene device.

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