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    • 6. 发明申请
    • Aqueous-Liquid-Absorbing Agent and its Production Process
    • 水性吸液剂及其制备方法
    • US20070207924A1
    • 2007-09-06
    • US10593706
    • 2005-03-11
    • Hiroyuki IkeuchiKazushi ToriiShigeru SakamotoTaku IwamuraSayaka Machida
    • Hiroyuki IkeuchiKazushi ToriiShigeru SakamotoTaku IwamuraSayaka Machida
    • B01J20/26
    • C08J3/245
    • An object of the present invention is to provide an aqueous-liquid-absorbing agent which comprises water-absorbent resin particles as essential components and is suitable for uses in sanitary materials. As a means of achieving this object, an aqueous-liquid-absorbing agent according to the present invention is an aqueous-liquid-absorbing agent comprising water-absorbent resin particles as essential components, wherein the water-absorbent resin particles are obtained by a process including the step of polymerizing a water-soluble ethylenically unsaturated monomer and have a crosslinked structure in their inside; with the aqueous-liquid-absorbing agent exhibiting an absorption rate (FSR) of not less than 0.2 g/g/s, a water absorption capacity (CRC) of 5 to 25 g/g, a saline flow conductivity (SFC) of not less than 400×10−7 cm3·s/g, and a wet porosity of not less than 20%. A process according to the present invention for obtaining such an aqueous-liquid-absorbing agent is characterized by comprising the steps of: obtaining a hydrogel from an aqueous monomer solution including a water-soluble ethylenically unsaturated monomer and an internal-crosslinking agent of not less than 0.2 mol % in ratio to the monomer; and then extruding this hydrogel from a perforated structure having perforation diameters in the range of 0.3 to 6.4 mm to thereby pulverize the hydrogel.
    • 本发明的目的是提供一种含水吸收剂,其包含作为必需成分的吸水性树脂粒子,适用于卫生材料。 作为实现该目的的手段,本发明的水性液体吸收剂是以吸水性树脂粒子为必须成分的水性液体吸收剂,其中吸水性树脂粒子是通过 包括聚合水溶性烯键式不饱和单体并在其内部具有交联结构的步骤; 吸水率(FSR)为0.2g / g / s以上,吸水容量(CRC)为5〜25g / g,盐水流动电导率(SFC)不为 小于400×10 -3 cm 3 / g,湿气孔率不小于20%。 根据本发明的用于获得这种水性液体吸收剂的方法的特征在于包括以下步骤:从包含水溶性烯键式不饱和单体和不少于少量的内部交联剂的单体水溶液获得水凝胶 与单体的比例为0.2摩尔%以上; 然后从穿孔直径在0.3至6.4mm范围内的穿孔结构体挤出该水凝胶,从而粉碎水凝胶。
    • 8. 发明授权
    • Method for producing water absorbent resin particle
    • 吸水性树脂颗粒的制造方法
    • US09593212B2
    • 2017-03-14
    • US12296808
    • 2007-09-28
    • Shigeru SakamotoYoshio IrieHiroyuki IkeuchiMakoto NagasawaKunihiko IshizakiSayaka Machida
    • Shigeru SakamotoYoshio IrieHiroyuki IkeuchiMakoto NagasawaKunihiko IshizakiSayaka Machida
    • C08J3/12B29B17/00
    • C08J3/12B29B9/06B29B17/00C08J2300/14Y02W30/62
    • The present invention provides a method for producing a water absorbent resin particle, in high productivity, not only in a controlled manner of particle size but also enhancing fundamental property (absorption capacity or absorption capacity against pressure) of a water absorbent resin. A method for producing a water absorbent resin particle having the cross-linking polymerization step for an aqueous solution of an unsaturated monomer; the grain refining step for water-swellable, water-containing gel-like cross-linked polymer (a) obtained in the cross-linking polymerization step; the drying step for grain refined gel; and the crushing step for a dried substance, wherein, in the grain refining step for the water-swellable, water-containing gel-like cross-linked polymer (a), water-swellable, water-containing gel-like cross-linked polymer (b), having solid content or centrifuge retention capacity different from solid content or centrifuge retention capacity of the cross-linked polymer (a) by equal to or larger than 1%, is subjected to coexistence.
    • 本发明提供了一种生产吸水性树脂颗粒的方法,不仅以受控的粒度控制,而且提高了吸水性树脂的基本性能(吸收能力或抗吸收能力)。 一种制备具有用于不饱和单体的水溶液的交联聚合步骤的吸水性树脂颗粒的方法; 在交联聚合步骤中获得的水溶胀性含水凝胶状交联聚合物(a)的晶粒细化步骤; 颗粒精制凝胶的干燥步骤; 和干物质的破碎步骤,其中在水溶胀性含水凝胶状交联聚合物(a)的晶粒细化工序中,水溶胀性含水凝胶状交联聚合物 (b)具有不同于交联聚合物(a)的固体含量或离心保留能力等于或大于1%的固体含量或离心保留能力共存。