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    • 9. 发明授权
    • Hydrophilic resin, absorbent article, and acrylic acid for polymerization
    • 亲水性树脂,吸收性物品和丙烯酸进行聚合
    • US06444744B1
    • 2002-09-03
    • US09258503
    • 1999-02-27
    • Hirotama FujimaruKunihiko IshizakiNobuyuki HaradaSei Nakahara
    • Hirotama FujimaruKunihiko IshizakiNobuyuki HaradaSei Nakahara
    • C08F2006
    • C08F20/06A61L15/24A61L15/60C08L33/02
    • The invention provides a hydrophilic resin and an absorbent article, both of which display still less coloring and discoloring when preserved for a long time. The hydrophilic resin is any one of: 1) a hydrophilic resin, obtained by a process including the step of polymerizing a monomer component including a major proportion of either one or both of acrylic acid and its salt which merely have a content of at most 0.20 ppm in total of hydroquinone and benzoquinone; 2) a hydrophilic resin, comprising a major proportion of an acrylic polymer and a minor proportion of either one or both of hydroquinone and benzoquinone, with the hydrophilic resin further comprising a quinhydronation inhibitor of 10˜1,000,000 times the total weight of hydroquinone and benzoquinone; 3) a hydrophilic resin, comprising a major proportion of an acrylic polymer and merely having a coloring degree (YI) of at most 20 after being left under conditions of the open system, 70° C., 65% RH for 1 week; and 4) a hydrophilic resin, which is a water-absorbent resin and is surface-crosslinked or surface-impregnated with a polyhydric alcohol and displays pH of 5.5 or less in a physiological salt solution and has an absorption capacity of 20 g/g or more for a physiological salt solution under a load of 50 g/cm2. In addition, the absorbent article comprises the above hydrophilic resin.
    • 本发明提供一种亲水性树脂和吸收性物品,两者在长期保存时都显示出较少的着色和变色。 亲水性树脂是以下中的任何一种:1)亲水性树脂,其通过包括以下步骤的方法获得,所述方法包括使仅含有至多0.20的含量的丙烯酸及其盐中的一种或两种以上的主要部分 对苯二酚和苯醌总共ppm; 2)亲水性树脂,其中主要部分为丙烯酸类聚合物和少量氢醌和苯醌中的一种或两种,亲水性树脂还含有氢醌和苯醌总重量的10〜1,000,000倍的醌氢醌抑制剂; 3)亲水性树脂,其包含主要部分的丙烯酸类聚合物,并且仅在开放系统的条件下,70℃,65%RH下仅具有至多20的着色度(YI)1周; 和4)作为吸水性树脂的表面交联或表面浸渍多元醇的亲水性树脂,在生理盐溶液中显示出pH5.5以下的吸收能力,吸收容量为20g / g, 更多的是在50g / cm 2的负荷下的生理盐溶液。 另外,吸收性物品包含上述亲水性树脂。
    • 10. 发明授权
    • Water-absorbent agent and method for manufacturing the same
    • 吸水剂及其制造方法
    • US06187872B1
    • 2001-02-13
    • US09051313
    • 1998-04-06
    • Toru YanaseKazuki KimuraShin-ichi FujinoKinya NagasunaKunihiko IshizakiHirotama FujimaruNobuyuki Harada
    • Toru YanaseKazuki KimuraShin-ichi FujinoKinya NagasunaKunihiko IshizakiHirotama FujimaruNobuyuki Harada
    • C08F812
    • A61L15/60B01J20/26C08F8/00C08F8/44C08F2800/20C08F2810/20C08F220/06
    • A hydrogel polymer obtained by polymerizing a monomer component including acrylic acid (salt) is post-neutralized so that each of polymer particles derived from a polymer produced by neutralizing the hydrogel polymer has an allowable neutralization ratio. The polymer as obtained by neutralizing the hydrogel polymer is reacted with a crosslinking agent reactive to a functional group of the polymer. The allowable neutralization ratio, for example, is a neutralization ratio which is not lower, by not less than 20 mole percent, or more than, at least 55 mole percent, than an average neutralization ratio of a mass of the polymer particles, and the post-neutralization is carried out so that a number of polymer particles having a non-allowable neutralization ratio outside the allowable neutralization range is not more than 10 in 200 polymer particles, thus obtaining a water-absorbent agent having high absorbency under no applied pressure and high pressure wherein the amount of water soluble component is lower compared with the conventional water-absorbent agent and a change in pH of a swollen gel is small.
    • 通过使包含丙烯酸(盐)的单体组分聚合而获得的水凝胶聚合物被后中和,使得通过中和水凝胶聚合物产生的聚合物衍生的各聚合物颗粒具有允许的中和比。 通过中和水凝胶聚合物获得的聚合物与与聚合物的官能团反应的交联剂反应。 例如,容许的中和比例是中和比,其比不到聚合物颗粒的质量的平均中和比不低于20摩尔%,或至多55摩尔%,而且 进行中和后,使得在200个聚合物粒子中,许多中和比例不超过允许中和比例的聚合物颗粒数不超过10个,从而获得在无施加压力下具有高吸收性的吸水剂, 其中水溶性成分的量与常规吸水剂相比较低,并且溶胀凝胶的pH变化很小。