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    • 57. 发明授权
    • Production process for hydrophilic polymer
    • 亲水性聚合物的生产工艺
    • US06207796B1
    • 2001-03-27
    • US09436345
    • 1999-11-09
    • Yorimichi DairokuKoji MiyakeYasuhiro FujitaYoshio Irie
    • Yorimichi DairokuKoji MiyakeYasuhiro FujitaYoshio Irie
    • C08F600
    • C08F6/02C08F6/001C08F6/008
    • The present invention provides a production process to obtain a hydrophilic polymer, having a low residual monomer content, with good productivity while keeping the properties of a hydrogel polymer resultant from polymerization. In a drying process for a hydrogel polymer, the hydrogel polymer is dried under normal pressure at a material temperature of not higher than 90° C. until the water content of the hydrogel polymer reduces to 15˜40 weight %, and then the hydrogel polymer is kept for not shorter than 10 minutes either in a state where the change of the water content of the hydrogel polymer is within 5 weight % and where the material temperature is in the range of 70˜120° C. or in a state where the water content of the hydrogel polymer is in the range of 15˜40 weight % and where the material temperature is in the range of 70˜120° C., and then the hydrogel polymer is finish-dried.
    • 本发明提供一种生产方法,以获得具有低残留单体含量的亲水性聚合物,同时具有良好的生产率,同时保持水凝胶聚合物的聚合性能。 在水凝胶聚合物的干燥过程中,将水凝胶聚合物在不高于90℃的材料温度下在常压下干燥,直到水凝胶聚合物的含水量降低至15〜40重量%,然后将水凝胶聚合物 在水凝胶聚合物的含水量变化在5重量%以内且材料温度在70〜120℃范围内的状态下,保持不短于10分钟,或者在 水凝胶聚合物的含水量在15〜40重量%的范围内,材料温度在70〜120℃的范围内,然后将水凝胶聚合物进行精干。
    • 59. 发明授权
    • Method of production of water-absorbing resin
    • 吸水树脂的生产方法
    • US6100305A
    • 2000-08-08
    • US91462
    • 1998-06-18
    • Koji MiyakeYoshihiro MotonoNobuyuki HaradaAkito YanoTeruyuki KantoShigeru Sakamoto
    • Koji MiyakeYoshihiro MotonoNobuyuki HaradaAkito YanoTeruyuki KantoShigeru Sakamoto
    • B01J20/26C08J9/36
    • B01J20/26
    • A water-absorbent resin is produced by crushing a mass of crosslinked hydrogel polymer having high adhesion and elastic properties without kneading it, and drying the crushed crosslinked hydrogel polymer. In the case when the crosslinked hydrogel polymer includes cells therein, the crosslinked hydrogel polymer is crushed so as to restrain reduction in the number of cells contained in the crosslinked hydrogel polymer. The crosslinked hydrogel polymer is crushed by any of crushing methods including: shearing the crosslinked hydrogel polymer with a fixed blade and a rotary blade; cutting the crosslinked hydrogel polymer with a cutter having a pair of rotary blades that are mounted on different shafts and rotate while at least partly overlapping each other; cutting the crosslinked hydrogel polymer with a cutter having a rotary blade using a lubricant; and crushing the crosslinked hydrogel polymer after freezing. With the use of the above methods, it is possible to industrially and easily mass-produce porous water-absorbent resins with excellent absorption properties while restraining reduction in the number of cells contained in the crosslinked hydrogel polymer.
    • PCT No.PCT / JP97 / 03753 Sec。 371日期1998年6月18日 102(e)1998年6月18日PCT 1997年10月16日PCT PCT。 第WO98 / 17453号公报 日期:1998年04月30日吸水性树脂通过粉碎具有高粘合性和弹性的交联水凝胶聚合物的质量而不进行捏合而制造,并干燥破碎的交联水凝胶聚合物。 当交联的水凝胶聚合物包括其中的细胞时,交联的水凝胶聚合物被粉碎,以便抑制交联的水凝胶聚合物中所含的细胞数量的减少。 交联的水凝胶聚合物通过任何破碎方法粉碎,包括:用固定刀片和旋转刀片剪切交联的水凝胶聚合物; 用具有一对旋转叶片的切割器切割交联的水凝胶聚合物,所述一对旋转叶片安装在不同的轴上并在彼此至少部分重叠的同时旋转; 用具有旋转叶片的切割机使用润滑剂切割交联的水凝胶聚合物; 并在冷冻后破碎交联的水凝胶聚合物。 通过使用上述方法,可以在抑制交联水凝胶聚合物中所含的细胞数量的抑制的情况下,工业上容易地大量生产具有优异吸收性能的多孔吸水性树脂。