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    • 10. 发明授权
    • Foamed polymer and process for production thereof
    • 发泡聚合物及其生产方法
    • US5840780A
    • 1998-11-24
    • US845438
    • 1997-04-25
    • Robert N. Wilson
    • Robert N. Wilson
    • A61L15/42A61L15/60C08G18/48C08J9/00C08L75/08C08J9/24C08J9/35
    • C08J9/0061A61L15/425A61L15/60C08G18/4812C08G18/4837C08L75/08C08G2101/0008C08G2101/005C08G2101/0083C08J2207/12C08J2375/04C08J2400/14
    • 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.degree. to about 25.degree. 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.degree. to about 25.degree. 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 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.
    • 一种具有多孔结构并包含非表面交联超吸收聚合物的发泡异氰酸酯基聚合物,该发泡聚合物能够:(i)吸收至少约10重量%的0.9重量/重量% %NaCl水溶液保持在约20℃至约25℃的温度,和(ii)保持其结合到超吸收性聚合物上的吸收的NaCl水溶液的至少约10倍重量。 还描述了用于生产发泡异氰酸酯基聚合物的方法。 该方法包括以下步骤:使异氰酸酯,含活性氢的化合物,水性发泡剂,催化剂和非表面交联的超吸收性聚合物接触,所述超吸收聚合物能够吸收至少约10倍重量 的0.9重量/重量 %NaCl水溶液保持在约20℃至约25℃的温度范围内。 并膨胀反应混合物以制备发泡异氰酸酯基聚合物。 含活性氢的化合物包含约10%至100%重量的亲水性含活性氢化合物和0至约90%重量的非亲水性含活性氢化合物。 发泡异氰酸酯类聚合物理想地适用于个人卫生装置中的吸收层。