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公开(公告)号：US20140243478A1
公开(公告)日：2014-08-28
申请号：US14349235
申请日：2012-09-24
发明人： Atsushi Heguri , Kenji Tanimura , Yuichi Onoda , Masayoshi Handa
IPC分类号： C08F120/06 , C08F265/02
CPC分类号： C08F120/06 , C08F2/32 , C08F20/06 , C08F265/02
摘要： There is disclosed a method for producing water-absorbent resin particles, comprising a polymerization step that includes mixing an oily liquid comprising a hydrocarbon dispersing medium and a surfactant, and an aqueous liquid comprising an aqueous solvent and a water-soluble ethylenically unsaturated monomer, forming a suspension comprising an oily liquid and an aqueous liquid dispersed in the oily liquid, and polymerizing the water-soluble ethylenically unsaturated monomer in the suspension. The HLB of the surfactant is 6 or greater, and the temperature of the suspension is kept at 35° C. or higher during the period from initial mixing of the oily liquid and aqueous liquid until complete mixing of the entire amounts.
摘要翻译： 公开了一种生产吸水性树脂颗粒的方法，包括聚合步骤，其包括将包含烃分散介质和表面活性剂的油性液体与包含水性溶剂和水溶性烯键式不饱和单体的水性液体混合，形成 悬浮液，其包含油性液体和分散在油性液体中的水性液体，并将悬浮液中的水溶性烯属不饱和单体聚合。 表面活性剂的HLB为6以上，在从油性液体和水性液体的初始混合直到完全混合的期间内，悬浮液的温度保持在35℃以上。
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公开(公告)号：US11084020B2
公开(公告)日：2021-08-10
申请号：US16489854
申请日：2018-03-02
发明人： Mikito Chiba , Yuichi Onoda
摘要： A water-absorbent resin that exhibits a high liquid-retention capacity under a load and a small amount of re-wet, even when it is used in an absorbent material having a low proportion of hydrophilic fibers. The water-absorbent resin includes a polymer of a water-soluble ethylenically unsaturated monomer, wherein when a cross-sectional image of the water-absorbent resin is observed using X-ray computed tomography, the water-absorbent resin has cavity area percentage in the cross-sectional image of 10% or less.
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公开(公告)号：US09605094B2
公开(公告)日：2017-03-28
申请号：US14349235
申请日：2012-09-24
发明人： Atsushi Heguri , Kenji Tanimura , Yuichi Onoda , Masayoshi Handa
IPC分类号： C08F120/06 , C08F265/02 , C08F20/06 , C08F2/32
CPC分类号： C08F120/06 , C08F2/32 , C08F20/06 , C08F265/02
摘要： There is disclosed a method for producing water-absorbent resin particles, comprising a polymerization step that includes mixing an oily liquid comprising a hydrocarbon dispersing medium and a surfactant, and an aqueous liquid comprising an aqueous solvent and a water-soluble ethylenically unsaturated monomer, forming a suspension comprising an oily liquid and an aqueous liquid dispersed in the oily liquid, and polymerizing the water-soluble ethylenically unsaturated monomer in the suspension. The HLB of the surfactant is 6 or greater, and the temperature of the suspension is kept at 35° C. or higher during the period from initial mixing of the oily liquid and aqueous liquid until complete mixing of the entire amounts.
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公开(公告)号：US11465125B2
公开(公告)日：2022-10-11
申请号：US16490037
申请日：2018-03-02
发明人： Mikito Chiba , Yuichi Onoda
摘要： A water-absorbing resin that exhibits excellent absorption performance and a high permeation rate with respect to liquids to be absorbed, and that effectively reduces liquid leakages, even in an absorbent body using a large amount of the water-absorbing resin. The water-absorbing resin is formed from a polymer of a water-soluble ethylenically unsaturated monomer, and when a cross-sectional image of the water-absorbing resin obtained by X-ray computer tomography is observed, the percent area of cavity portions in the cross-sectional image is 2-10%. The liquid flow rate index when a physiological saline liquid column flow rate test is performed on the water-absorbent resin having a particle diameter of 250 to 500 μm at 37° C. is 5-20.
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公开(公告)号：US11332558B2
公开(公告)日：2022-05-17
申请号：US16490347
申请日：2018-03-02
发明人： Mikito Chiba , Yuichi Onoda
摘要： Provided is a water-absorbent resin that quickly absorbs water, even in sandbag in which a large amount of the water-absorbent resin has been used, that does not easily form unswollen lump, and that has a high gel swelling volume when water is used to swell the water-absorbent resin. This water-absorbent resin is configured from a polymer of water-soluble ethylenic unsaturated monomers. The physiological-saline absorption capacity of the water-absorbent resin is 40-60 g/g. When a cross-sectional image of the water-absorbent resin is observed by x-ray computed tomography, the fraction of the area of the cross-sectional image that is hollow portions (the hollow area ratio of the cross-sectional image), as calculated on the basis of formula (I), is no more than 10%. (I) Hollow area ratio [%]={total cross-sectional area (B) of hollow portions of the water-absorbent resin/(total cross-sectional area (A) of resin portions of the water-absorbent resin+total cross-sectional area (B) of hollow portions of the water-absorbent resin)}×100%.
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公开(公告)号：US20150158015A1
公开(公告)日：2015-06-11
申请号：US14372161
申请日：2013-01-22
CPC分类号： B01J20/3085 , A61L15/12 , A61L15/24 , A61L15/48 , A61L15/60 , B01J20/262 , C08F2/32 , C08F20/06 , C08F120/06 , C08L33/02 , C08L33/08
摘要： There is disclosed a method for producing water-absorbent resin particles comprising a step that includes reversed-phase suspension polymerization of a water-soluble ethylenically unsaturated monomer in a suspension containing a surfactant that comprises a surfactant that comprises a fatty acid ester of sorbitan or sorbitol, or derivative thereof, and a hydrocarbon dispersion medium. The fatty acid ester includes a lauric acid ester and at least one kind of other ester selected from the group consisting of palmitic acid esters, stearic acid esters and behenic acid esters. The proportion of the peak area for lauric acid ester is 30-60%, based on the total peak area for fatty acid esters in the GPC chromatogram obtained from the fatty acid esters, and the proportion of the total peak area for other ester is 10-50%.
摘要翻译： 公开了一种吸水性树脂颗粒的制造方法，其包括在包含表面活性剂的悬浮液中包含水溶性烯属不饱和单体的反相悬浮聚合的步骤，所述表面活性剂包含含有脱水山梨糖醇或山梨糖醇的脂肪酸酯的表面活性剂 或其衍生物，以及烃分散介质。 脂肪酸酯包括月桂酸酯和至少一种选自棕榈酸酯，硬脂酸酯和山萮酸酯的其它酯。 月桂酸酯的峰面积比例为脂肪酸酯得到的GPC色谱图中脂肪酸酯的总峰面积的30-60％，其他酯的总峰面积的比例为10 -50％。
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公开(公告)号：US11193899B2
公开(公告)日：2021-12-07
申请号：US16490038
申请日：2018-03-02
发明人： Mikito Chiba , Yuichi Onoda
IPC分类号： G06K9/00 , C08F2/00 , G01N23/046 , G06T7/62 , G01B15/00 , G01N23/083 , G06T7/00 , G06T11/00
摘要： Provided is a non-destructive method for evaluating the structure of a water-absorbing resin which can be advantageously used for controlling various properties of the water-absorbing resin. This non-destructive method for evaluating the structure of a water-absorbing resin involves non-destructively evaluating the structure of a water-absorbing resin through an X-ray computer tomographic technique, wherein the method comprises a step 1 for installing the water-absorbing resin to be evaluated on a test piece stage of an X-ray computer tomography device, a step 2 for performing X-ray computer tomography on the water-absorbing resin using the X-ray computer tomography device and acquiring tomographic image data of the water-absorbing resin, and a step 3 for analyzing the tomographic image data using image analysis software and obtaining a tomographic image of the water-absorbing resin.
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公开(公告)号：US09138722B2
公开(公告)日：2015-09-22
申请号：US14372161
申请日：2013-01-22
CPC分类号： B01J20/3085 , A61L15/12 , A61L15/24 , A61L15/48 , A61L15/60 , B01J20/262 , C08F2/32 , C08F20/06 , C08F120/06 , C08L33/02 , C08L33/08
摘要： There is disclosed a method for producing water-absorbent resin particles comprising a step that includes reversed-phase suspension polymerization of a water-soluble ethylenically unsaturated monomer in a suspension containing a surfactant that comprises a surfactant that comprises a fatty acid ester of sorbitan or sorbitol, or derivative thereof, and a hydrocarbon dispersion medium. The fatty acid ester includes a lauric acid ester and at least one kind of other ester selected from the group consisting of palmitic acid esters, stearic acid esters and behenic acid esters. The proportion of the peak area for lauric acid ester is 30-60%, based on the total peak area for fatty acid esters in the GPC chromatogram obtained from the fatty acid esters, and the proportion of the total peak area for other ester is 10-50%.
摘要翻译： 公开了一种吸水性树脂颗粒的制造方法，其包括在包含表面活性剂的悬浮液中包含水溶性烯属不饱和单体的反相悬浮聚合的步骤，所述表面活性剂包含含有脱水山梨糖醇或山梨糖醇的脂肪酸酯的表面活性剂 或其衍生物，以及烃分散介质。 脂肪酸酯包括月桂酸酯和至少一种选自棕榈酸酯，硬脂酸酯和山萮酸酯的其它酯。 月桂酸酯的峰面积比例为脂肪酸酯得到的GPC色谱图中脂肪酸酯的总峰面积的30-60％，其他酯的总峰面积的比例为10 -50％。
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