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    • 2. 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。
    • 4. 发明授权
    • Method for producing polyacrylic acid (salt) type water absorbent resin powder
    • 聚丙烯酸(盐)型吸水性树脂粉末的制造方法
    • US08765906B2
    • 2014-07-01
    • US13643682
    • 2011-04-27
    • Yusuke WatanabeKazushi ToriiKozo NogiKunihiko IshizakiReiko NakatsuruShigeru Sakamoto
    • Yusuke WatanabeKazushi ToriiKozo NogiKunihiko IshizakiReiko NakatsuruShigeru Sakamoto
    • C08G63/02C08G63/00
    • C08J3/12C08F6/008C08F122/105C08F220/06C08J3/122C08J3/245C08J2333/02C08L33/02
    • A water absorbent resin having less fine powder or powdery dust and a controlled particle size is provided, and the water absorption rate of the water absorbent resin is increased by a simple method at low cost, while maintaining or improving other physical properties such as liquid permeability. Disclosed is a method for producing a polyacrylic acid (salt)-type water absorbent resin powder, which includes, in sequence, a step of polymerizing an aqueous solution of acrylic acid (salt)-type monomer; a step of gel-crushing a gel of a water-containing gel-like crosslinked polymer during polymerization or after polymerization; a step of drying the water-containing gel-like crosslinked polymer; and a step of pulverizing and classifying the dried polymer, wherein water absorbent resin fine particles having a particle size of less than 150 μm or a hydrated-particles thereof is added to a step prior to the drying step, and in the drying step, hot air drying is carried out with a hot air having an average flow velocity of 1.0 to 3.0 [m/s], a dew point of 30° C. to 100° C., and a hot air temperature of 140° C. to 235° C.
    • 提供具有较少粉末或粉末粉尘和受控粒度的吸水性树脂,并且通过简单的方法以低成本提高吸水性树脂的吸水率,同时保持或改善其它物理性质如液体渗透性 。 公开了一种聚丙烯酸(盐)型吸水性树脂粉末的制造方法,其中,依次包括使丙烯酸(盐)型单体的水溶液聚合的工序; 在聚合过程中或聚合后凝胶化凝胶状凝胶状交联聚合物凝胶的步骤; 干燥含水凝胶状交联聚合物的工序; 将干燥聚合物粉碎并分级的步骤,其中在干燥步骤之前的步骤中加入粒径小于150μm的吸水性树脂微粒或其水合颗粒,并且在干燥步骤中,热 使用平均流速为1.0〜3.0 [m / s],露点为30℃〜100℃,热风温度为140℃〜235℃的热风进行空气干燥 C。