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    • 7. 发明申请
    • FOAMED POLYMER AND PROCESS FOR PRODUCTION THEREOF
    • 泡沫聚合物及其生产方法
    • WO1998000181A1
    • 1998-01-08
    • PCT/CA1997000450
    • 1997-06-26
    • WOODBRIDGE FOAM CORPORATIONWILSON, Robert, N.BLAIR, G., Ronald
    • WOODBRIDGE FOAM CORPORATION
    • A61L15/60
    • C08J9/0061A61L15/425A61L15/60C08J2375/04C08J2400/14C08L75/04
    • A foamed isocyanate-based polymer having a cellular structure and comprising a superabsorbent material, the polymer being capable of: (i) absorbing at least about 10 times its weight of a 0.9 wt./wt.% aqueous NaC1 solution maintained at a temperature of from about 20 to about 25 DEG C, and (ii) retaining at least about 10 times its weight of absorbed aqueous NaC1 solution which is bound to the superabsorbent material, the cellular structure having a cell size of at least about 30 cells/inch when measured pursuant to ASTM D3576-77. 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 superabsorbent material, the superabsorbent material being capable of absorbing at least about 10 times its weight of a 0.9 wt./wt.% aqueous NaC1 solution maintained at a temperature in the range of from about 20 to about 25 DEG 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-base polymer is ideally suitable for use in an absorption layer in a personal hygiene device.
    • 一种泡沫异氰酸酯基聚合物,其具有多孔结构并且包含超吸收材料,所述聚合物能够:(i)吸收至少约10倍重量的0.9重量/重量%NaCl水溶液,其保持在 约20至约25℃,和(ii)保留其与超吸收材料结合的吸收的NaCl水溶液的至少约10倍重量,细胞结构具有至少约30个细胞/英寸的细胞大小,当 根据ASTM D3576-77测量。 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,含水发泡剂,催化剂和超吸收材料接触,超吸收材料能够吸收至少约10重量%的0.9重量/ 重量%的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。 活性含氢化合物包含约10重量%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。 发泡异氰酸酯基聚合物理想地适用于个人卫生装置中的吸收层。