Production of a water-absorbing resin to which a particulate additive is admixed
    23.
    发明授权
    Production of a water-absorbing resin to which a particulate additive is admixed 有权
    生产混合有微粒添加剂的吸水性树脂

    公开(公告)号:US07786211B2

    公开(公告)日:2010-08-31

    申请号:US12158502

    申请日:2006-12-28

    CPC classification number: C08F2/44 C08F220/06 C08F222/1006

    Abstract: The invention relates to a process for producing a water-absorbing resin by polymerization of a reaction mixture comprising at least one hydrophilic monomer and, if appropriate, at least one crosslinker in a reactor, which comprises admixing the reaction mixture with at least one first portion of a particulate additive before the reaction mixture has reached a residence time of 40% of the overall residence time in the reactor and with at least one second portion of a particulate additive when the reaction mixture has reached a residence time of 45% or more of the overall residence time in the reactor, the additive being selected from water-absorbing resin powders, fillers and mixtures thereof, the total solids content of monomer and additive being in the range from 30% to 60% by weight, the amount of additive being in the range from 5% to 50% by weight, based on the monomers, and the weight ratio of the first portion to the second portion of the additive being in the range from 10:1 to 1:5. The resin powder is recycled fine-sized material for example. Not only the residual monomer content, specifically the residual crosslinker content, but also the level of extractables in the water-absorbing resin are reduced by the method of addition described. A high fraction of additives can be incorporated without the properties of the water-absorbing resin obtained being adversely affected. The additives enter a sufficiently firm bond with the resin, so that no excessive dusting occurs on exposure to mechanical stress.

    Abstract translation: 本发明涉及通过聚合包含至少一种亲水单体和如果合适的反应器中至少一种交联剂的反应混合物来生产吸水树脂的方法,其包括将反应混合物与至少一个第一部分 的反应混合物在反应混合物的停留时间达到总反应器停留时间的40%的停留时间和至少一个第二部分的颗粒状添加剂之前,当反应混合物达到45%或更多的停留时间时, 在反应器中的总停留时间,添加剂选自吸水树脂粉末,填料及其混合物,单体和添加剂的总固体含量在30重量%至60重量%的范围内,添加剂的量为 基于单体的5重量%至50重量%的范围,并且添加剂的第一部分与第二部分的重量比在10:1至 1:5。 树脂粉末是例如再循环的精细尺寸的材料。 通过所述的添加方法,不仅残留单体含量,特别是残留交联剂含量,而且吸水性树脂中的可萃取物的含量都降低。 可以并入高分数的添加剂,而不会对获得的吸水性树脂的性能产生不良影响。 添加剂与树脂进行足够牢固的粘合,使得在暴露于机械应力时不会发生过度的除尘。

    Fine-grained water-absorbent particles with a high fluid transport and absorption capacity
    24.
    发明授权
    Fine-grained water-absorbent particles with a high fluid transport and absorption capacity 有权
    具有高流体输送和吸收能力的细颗粒吸水颗粒

    公开(公告)号:US07759422B2

    公开(公告)日:2010-07-20

    申请号:US11665883

    申请日:2005-10-14

    CPC classification number: A61L15/60 C08L33/02

    Abstract: The invention relates to finely divided water-absorbing polymeric particles having high fluid transportation and absorption performance, the Centrifuge Retention Capacity (CRC) being not less than 26 g/g, the absorbency under a load of 4.83 kPa (AUL0.7 psi) not less than 23 g/g and the Transportation Value (TV) not less than 15,000 cm3s, the Transportation Value (TV) being the product of Saline Flow Conductivity (SFC) and wicking absorption after 60 minutes (DA60) multiplied by 107, and wherein the wicking absorption after 60 minutes (DA60) is the weight of 0.9% by weight sodium chloride solution absorbed by 70 g of the water-absorbing polymeric particles in 60 minutes, wherein the water-absorbing polymeric particles are situated, during measurement, in a circularly round vessel which has an internal diameter of 6 cm and is sealed at its lower end by a sieve base of 36 μm mesh size, and the sieve base is in atmospheric contact with 0.9% by weight sodium chloride solution, processes for their preparation and also their use in hygiene articles and packaging materials.

    Abstract translation: 本发明涉及具有高流体输送和吸收性能的细分散的吸水聚合物颗粒,离心保留容量(CRC)不小于26g / g,负荷4.83kPa(AUL0.7psi)下的吸收性不是 运输价值(TV)不小于15,000立方厘米,运输价值(TV)是盐水流动电导率(SFC)的乘积和60分钟后的吸液吸收(DA60)乘以107,其中 60分钟后的芯吸吸收(DA60)是在60分钟内由70g吸水性聚合物颗粒吸收的0.9重量%氯化钠溶液的重量,其中吸水聚合物颗粒在测量期间位于 内径6厘米的圆形圆形容器,其下端由36微米的筛孔尺寸的筛基密封,筛基与0.9重量%氯化钠溶液大气接触, 他们的准备以及在卫生用品和包装材料中的使用。

    Postcrosslinking of water absorbing polymers with cyclic carbamates and/or cyclic ureas
    25.
    发明授权
    Postcrosslinking of water absorbing polymers with cyclic carbamates and/or cyclic ureas 有权
    吸水聚合物与环状氨基甲酸酯和/或环脲的后交联

    公开(公告)号:US07655733B2

    公开(公告)日:2010-02-02

    申请号:US11630949

    申请日:2005-07-28

    CPC classification number: A61L15/60

    Abstract: Disclosed is a process for postcrosslinking a water absorbing polymer by the polymer being treated with at least one postcrosslinker and postcrosslinked and dried during or after the treatment by raising the temperature, the at least one postcrosslinker being a cyclic carbamate or a cyclic urea, wherein the cyclic carbamate or the cyclic urea was obtained by reacting respectively an aminoalcohol or a diamine with a cyclic carbonate.

    Abstract translation: 公开了一种通过用至少一种后交联剂处理的聚合物后交联吸水聚合物的方法,并且在处理期间或之后通过升高温度进行后交联和干燥,所述至少一种后交联剂是环状氨基甲酸酯或环脲,其中 通过使氨基醇或二胺与环状碳酸酯反应,得到环状氨基甲酸酯或环状脲。

    Absorbent Article Comprising Water-Absorbing Polymeric Particles And Method For The Production Thereof
    27.
    发明申请
    Absorbent Article Comprising Water-Absorbing Polymeric Particles And Method For The Production Thereof 审中-公开
    包含吸水性聚合物颗粒的吸收性物品及其制造方法

    公开(公告)号:US20090030155A1

    公开(公告)日:2009-01-29

    申请号:US12146530

    申请日:2008-06-26

    CPC classification number: A61L15/60 A61F13/15658 A61F13/5323 C08J3/245

    Abstract: The invention refers to absorbent structures for use in an absorbent article, the absorbent structure comprising a water absorbing material. The water absorbing material is obtainable by a process comprising the steps of bringing particles of a non surface-crosslinked water-absorbing polymer in contact with at least one post-crosslinker, at least one water-insoluble metal phosphate, and at least one further ingredient. The at least one ingredient is selected from at least one Nitrogen-containing water-soluble polymer, and at least one hydrophobic polymer. The particles are heat-treated at a temperature in the range from 120° C. to 300° C.

    Abstract translation: 本发明涉及用于吸收制品的吸收结构,该吸收结构包括吸水材料。 吸水材料可以通过以下方法获得,该方法包括以下步骤:使非表面交联的吸水聚合物的颗粒与至少一种后交联剂,至少一种水不溶性金属磷酸盐和至少一种其它成分 。 所述至少一种成分选自至少一种含氮水溶性聚合物和至少一种疏水性聚合物。 颗粒在120℃至300℃的温度下进行热处理。

    Absorbent Article Comprising Water-Absorbing Polymeric Particles And Method For The Production Thereof
    28.
    发明申请
    Absorbent Article Comprising Water-Absorbing Polymeric Particles And Method For The Production Thereof 审中-公开
    包含吸水性聚合物颗粒的吸收性物品及其制造方法

    公开(公告)号:US20090029044A1

    公开(公告)日:2009-01-29

    申请号:US12146521

    申请日:2008-06-26

    CPC classification number: A61L15/60

    Abstract: The invention refers to absorbent structures for use in an absorbent article, the absorbent structure comprising a water absorbing material. The water absorbing material is obtainable by a process comprising the steps of bringing particles of a non surface-crosslinked water-absorbing polymer in contact with at least one postcrosslinker, at least one Nitrogen-containing water-soluble polymer, and at least one hydrophobic polymer. The particles are heat-treated at a temperature in the range from 120° C. to 300° C.

    Abstract translation: 本发明涉及用于吸收制品的吸收结构,该吸收结构包括吸水材料。 吸水材料可以通过包括以下步骤的方法获得,所述方法包括使非表面交联的吸水聚合物的颗粒与至少一种后交联剂,至少一种含氮水溶性聚合物和至少一种疏水性聚合物接触 。 颗粒在120℃至300℃的温度下进行热处理。

    Production of a Water-Absorbing Resin to Which a Particulate Additive is Admixed
    29.
    发明申请
    Production of a Water-Absorbing Resin to Which a Particulate Additive is Admixed 有权
    混合颗粒添加剂的吸水树脂的生产

    公开(公告)号:US20080306209A1

    公开(公告)日:2008-12-11

    申请号:US12158502

    申请日:2006-12-28

    CPC classification number: C08F2/44 C08F220/06 C08F222/1006

    Abstract: The invention relates to a process for producing a water-absorbing resin by polymerization of a reaction mixture comprising at least one hydrophilic monomer and, if appropriate, at least one crosslinker in a reactor, which comprises admixing the reaction mixture with at least one first portion of a particulate additive before the reaction mixture has reached a residence time of 40% of the overall residence time in the reactor and with at least one second portion of a particulate additive when the reaction mixture has reached a residence time of 45% or more of the overall residence time in the reactor, the additive being selected from water-absorbing resin powders, fillers and mixtures thereof, the total solids content of monomer and additive being in the range from 30% to 60% by weight, the amount of additive being in the range from 5% to 50% by weight, based on the monomers, and the weight ratio of the first portion to the second portion of the additive being in the range from 10:1 to 1:5. The resin powder is recycled fine-sized material for example. Not only the residual monomer content, specifically the residual crosslinker content, but also the level of extractables in the water-absorbing resin are reduced by the method of addition described. A high fraction of additives can be incorporated without the properties of the water-absorbing resin obtained being adversely affected. The additives enter a sufficiently firm bond with the resin, so that no excessive dusting occurs on exposure to mechanical stress.

    Abstract translation: 本发明涉及通过聚合包含至少一种亲水单体和如果合适的反应器中至少一种交联剂的反应混合物来生产吸水树脂的方法,其包括将反应混合物与至少一个第一部分 的反应混合物在反应混合物的停留时间达到总反应器停留时间的40%的停留时间和至少一个第二部分的颗粒状添加剂之前,当反应混合物达到45%或更多的停留时间时, 在反应器中的总停留时间,添加剂选自吸水树脂粉末,填料及其混合物,单体和添加剂的总固体含量在30重量%至60重量%的范围内,添加剂的量为 基于单体的5重量%至50重量%的范围,并且添加剂的第一部分与第二部分的重量比在10:1至 1:5。 树脂粉末是例如再循环的精细尺寸的材料。 通过所述的添加方法,不仅残留单体含量,特别是残留交联剂含量,而且吸水性树脂中的可萃取物的含量都降低。 可以并入高分数的添加剂,而不会对获得的吸水性树脂的性能产生不良影响。 添加剂与树脂进行足够牢固的粘合,使得在暴露于机械应力时不会发生过度的除尘。

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