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公开(公告)号：US07683150B2
公开(公告)日：2010-03-23
申请号：US11493860
申请日：2006-07-27
IPC分类号： C08F20/04
CPC分类号： C08F220/06 , C08F222/385 , Y10S526/923
摘要： A water-absorbing resin has a polymer molecular chain in which 50 mol % or more of repeating units in the chain are carboxy group-containing units, wherein the carboxy group neutralization ratio in the central part of the resin is 60 mol % or more and the carboxy group neutralization ratio on the external surface of the resin is 50 mol % or less. A method for producing the water-absorbing resin comprises polymerizing a monomer solution to form a polymer, drying the resulting polymer, and heat-treating the dried polymer, wherein the monomer solution contains a mixture comprising an alkali metal salt of an unsaturated carboxylic acid and an ammonium salt thereof, the percentage of the ammonium salt being more than 50 mol % of the mixture, and further contains a condensation crosslinking agent.
摘要翻译： 吸水性树脂具有聚合物分子链，链中的50重量％以上的重复单元是含羧基的单元，其中树脂中心部分的羧基中和率为60摩尔％以上， 树脂外表面的羧基中和率为50摩尔％以下。 制造吸水性树脂的方法包括聚合单体溶液以形成聚合物，干燥所得聚合物并热处理干燥的聚合物，其中单体溶液含有包含不饱和羧酸的碱金属盐和 其铵盐，铵盐的百分比大于混合物的50摩尔％，并且还含有缩合交联剂。
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公开(公告)号：US20080027180A1
公开(公告)日：2008-01-31
申请号：US11493860
申请日：2006-07-27
IPC分类号： C08F120/10
CPC分类号： C08F220/06 , C08F222/385 , Y10S526/923
摘要： A water-absorbing resin has a polymer molecular chain in which 50 mol % or more of repeating units in the chain are carboxy group-containing units, wherein the carboxy group neutralization ratio in the central part of the resin is 60 mol % or more and the carboxy group neutralization ratio on the external surface of the resin is 50 mol % or less. A method for producing the water-absorbing resin comprises polymerizing a monomer solution to form a polymer, drying the resulting polymer, and heat-treating the dried polymer, wherein the monomer solution contains a mixture comprising an alkali metal salt of an unsaturated carboxylic acid and an ammonium salt thereof, the percentage of the ammonium salt being more than 50 mol % of the mixture, and further contains a condensation crosslinking agent.
摘要翻译： 吸水性树脂具有聚合物分子链，链中的50重量％以上的重复单元是含羧基的单元，其中树脂中心部分的羧基中和率为60摩尔％以上， 树脂外表面的羧基中和率为50摩尔％以下。 制造吸水性树脂的方法包括聚合单体溶液以形成聚合物，干燥所得聚合物并热处理干燥的聚合物，其中单体溶液含有包含不饱和羧酸的碱金属盐和 其铵盐，铵盐的百分比大于混合物的50摩尔％，并且还含有缩合交联剂。
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3.发明申请Water Absorbing Resin Particle Agglomerates and a Manufactiring Method of the Same 审中-公开吸水树脂颗粒聚集体及其制造方法公开(公告)号：US20110204289A1
公开(公告)日：2011-08-25
申请号：US13102333
申请日：2011-05-06
CPC分类号： C08F2/18 , A61L15/24 , A61L15/42 , C08F6/18 , C08F220/06 , C08F222/385 , Y10T428/2982 , C08L33/02
摘要： Provided are a manufacturing method of water absorbing resin particle agglomerates capable of producing water absorbing resin particles having a sufficiently high water retention property and a large particle size without using a special material, which process has steps of (1) a polymerization step for producing primary particles of a water absorbing resin comprising suspending an aqueous monomer solution containing an unsaturated carboxylate in an organic solvent containing a nonionic surfactant therein, and subjecting the resulting suspension to reverse-phase suspension polymerization; and (2) an agglomeration step of agglomerating the primary particles by using a water soluble solvent.; and water absorbing resin particle agglomerates stably showing a high water retention property and satisfying the following requirements:(a) 50 mol % or greater of repeating units of the polymer molecular chain of the water absorbing resin constituting the primary particles are carboxyl group-containing units and at least a portion of carboxyl groups of the carboxyl group-containing units is neutralized with at least one base selected from alkali metals, amines, and ammonia, and (b) the water absorbing resin particle agglomerates comprise, on the outer surface thereof, a portion having a neutralization ratio of carboxyl groups of not greater than 40 mol % and, inside of the water absorbing resin particle agglomerates, a portion having a neutralization ratio of carboxyl groups of 50 mol % or greater.
摘要翻译： 本发明提供一种能够制造具有足够高的保水性和大粒径的吸水性树脂颗粒而不使用特殊材料的吸水性树脂颗粒聚集体的制造方法，该方法具有以下步骤：（1） 吸水树脂颗粒包括将含有不饱和羧酸盐的单体水溶液悬浮在含有非离子表面活性剂的有机溶剂中，并将所得悬浮液进行反相悬浮聚合; 和（2）通过使用水溶性溶剂使一次粒子凝聚的凝聚步骤。 和具有高保水性的水溶性树脂颗粒凝聚体，满足以下要求：（a）构成一次粒子的吸水性树脂的聚合物分子链的重复单元的50摩尔％以上为含羧基单元 并且含有羧基的单元的至少一部分羧基用至少一种选自碱金属，胺和氨的碱中和，（b）吸水性树脂颗粒附聚物在其外表面上， 羧基的中和率为40摩尔％以下，在吸水性树脂粒子聚集体的内部，羧基的中和率为50摩尔％以上的部分。
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4.发明申请Water Absorbing Resin Particle Agglomerates and Manufacturing Method of the Same 审中-公开吸水树脂颗粒聚集体及其制造方法公开(公告)号：US20090169891A1
公开(公告)日：2009-07-02
申请号：US12225718
申请日：2006-11-01
CPC分类号： C08F2/18 , A61L15/24 , A61L15/42 , C08F6/18 , C08F220/06 , C08F222/385 , Y10T428/2982 , C08L33/02
摘要： Provided are a manufacturing method of water absorbing resin particle agglomerates capable of producing water absorbing resin particles having a sufficiently high water retention property and a large particle size without using a special material, which process has steps of (1) a polymerization step for producing primary particles of a water absorbing resin comprising suspending an aqueous monomer solution containing an unsaturated carboxylate in an organic solvent containing a nonionic surfactant therein, and subjecting the resulting suspension to reverse-phase suspension polymerization, and (2) an agglomeration step of agglomerating the primary particles by using a water soluble solvent; and water absorbing resin particle agglomerates stably showing a high water retention property and satisfying the following requirements: (a) 50 mol % or greater of repeating units of the polymer molecular chain of the water absorbing resin constituting the primary particles are carboxyl group-containing units and at least a portion of carboxyl groups of the carboxyl group-containing units is neutralized with at least one base selected from alkali metals, amines, and ammonia, and (b) the water absorbing resin particle agglomerates comprise, on the outer surface thereof, a portion having a neutralization ratio of carboxyl groups of not greater than 40 mol % and, inside of the water absorbing resin particle agglomerates, a portion having a neutralization ratio of carboxyl groups of 50 mol % or greater.
摘要翻译： 本发明提供一种能够制造具有足够高的保水性和大粒径的吸水性树脂颗粒而不使用特殊材料的吸水性树脂颗粒聚集体的制造方法，该方法具有以下步骤：（1） 吸水树脂颗粒包括将含有不饱和羧酸盐的单体水溶液悬浮在含有非离子表面活性剂的有机溶剂中，并将所得悬浮液进行反相悬浮聚合，和（2）使一次颗粒附聚的附聚步骤 通过使用水溶性溶剂; 和具有高保水性的水溶性树脂颗粒凝聚体，满足以下要求：（a）构成一次粒子的吸水性树脂的聚合物分子链的重复单元的50摩尔％以上为含羧基单元 并且含有羧基的单元的至少一部分羧基用至少一种选自碱金属，胺和氨的碱中和，（b）吸水性树脂颗粒附聚物在其外表面上， 羧基的中和率为40摩尔％以下，在吸水性树脂粒子聚集体的内部，羧基的中和率为50摩尔％以上的部分。
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