Process for the production of a superabsorbent polymer
    2.
    发明授权
    Process for the production of a superabsorbent polymer 失效
    用于生产超吸收性聚合物的方法

    公开(公告)号:US08198385B2

    公开(公告)日:2012-06-12

    申请号:US12942633

    申请日:2010-11-09

    摘要: The present invention relates to process for the preparation of a superabsorbent polymer comprising the steps of a) subjecting an aqueous monomer mixture containing at least one α,β-ethylenically unsaturated monomer; at least one monomer bearing at least two α,β-ethylenically unsaturated groups; iron ions in an amount of 0.1 to 3 wppm based on the total weight of the aqueous monomer mixture; and at least one chelating agent in an amount to provide a mol ratio of chelating agent to iron ion of 0.8 to 4.0 to free radical polymerization in an reactor to obtain a super-absorbent polymer; and b) recovering the superabsorbent polymer, whereby if the process is continuous and is run in an agitated reactor the upper limit of the mol ratio of chelating agent to iron ion is 4.0 for a throughput of total reaction mixture through the reactor of at most 1.3 kg/h per liter reactor volume.

    摘要翻译: 本发明涉及制备超吸收性聚合物的方法,包括以下步骤:a)使含有至少一种α,β-烯属不饱和单体的含水单体混合物; 至少一种含有至少两个α,β-烯属不饱和基团的单体; 相对于含水单体混合物的总重量,铁离子的量为0.1〜3wppm; 和至少一种螯合剂,其量使得螯合剂与铁离子的摩尔比为0.8至4.0,以在反应器中进行自由基聚合以获得超吸收性聚合物; 并且b)回收超吸收性聚合物,由此如果该方法是连续的并且在搅拌反应器中运行,螯合剂与铁离子的摩尔比的上限为4.0,对于通过反应器的总反应混合物的通量为至多1.3 kg / h每升反应器体积。

    PROCESS FOR THE PRODUCTION OF A SUPERABSORBENT POLYMER
    3.
    发明申请
    PROCESS FOR THE PRODUCTION OF A SUPERABSORBENT POLYMER 失效
    制备超吸收聚合物的方法

    公开(公告)号:US20110245436A1

    公开(公告)日:2011-10-06

    申请号:US12942633

    申请日:2010-11-09

    IPC分类号: C08F2/10 C08F2/01

    摘要: The present invention relates to process for the preparation of a superabsorbent polymer comprising the steps of a) subjecting an aqueous monomer mixture containing at least one α,β-ethylenically unsaturated monomer; at least one monomer bearing at least two α,β-ethylenically unsaturated groups; iron ions in an amount of 0.1 to 3 wppm based on the total weight of the aqueous monomer mixture; and at least one chelating agent in an amount to provide a mol ratio of chelating agent to iron ion of 0.8 to 4.0 to free radical polymerization in an reactor to obtain a super-absorbent polymer; and b) recovering the superabsorbent polymer, whereby if the process is continuous and is run in an agitated reactor the upper limit of the mol ratio of chelating agent to iron ion is 4.0 for a throughput of total reaction mixture through the reactor of at most 1.3 kg/h per liter reactor volume.

    摘要翻译: 本发明涉及制备超吸收性聚合物的方法,包括以下步骤:a)使含有至少一种α,β-烯属不饱和单体的含水单体混合物; 至少一种含有至少两个α,β-烯属不饱和基团的单体; 相对于含水单体混合物的总重量,铁离子的量为0.1〜3wppm; 和至少一种螯合剂,其量使得螯合剂与铁离子的摩尔比为0.8至4.0,以在反应器中进行自由基聚合以获得超吸收性聚合物; 并且b)回收超吸收性聚合物,由此如果该方法是连续的并且在搅拌反应器中运行,螯合剂与铁离子的摩尔比的上限为4.0,对于通过反应器的总反应混合物的通量为至多1.3 kg / h每升反应器体积。

    Continuous process for the production of a superabsorbent polymer
    5.
    发明授权
    Continuous process for the production of a superabsorbent polymer 失效
    用于生产超吸收性聚合物的连续方法

    公开(公告)号:US08653210B2

    公开(公告)日:2014-02-18

    申请号:US13561214

    申请日:2012-07-30

    IPC分类号: C08F222/02

    CPC分类号: C08F2/14 C08F2/16

    摘要: The present invention relates to a continuous process for the production of a superabsorbent polymer comprising providing an acidic liquid aqueous monomer mixture containing dissolved oxygen; continuously feeding the aqueous monomer mixture to a reactor; introducing a source of carbonate or hydrogen carbonate into the aqueous monomer mixture prior to entry into the reactor thereby forming a gas phase comprising carbon dioxide and at least a part of the dissolved oxygen, the gas phase being dispersed in the liquid phase; subjecting the gas/liquid mixture to at least partial phase separation immediately prior to or after entry into the reactor and at least partially removing the separated gaseous phase; subjecting the liquid phase in the reactor to free-radical polymerization to obtain the superabsorbent polymer, and continuously removing the superabsorbent polymer from the reactor.

    摘要翻译: 本发明涉及制备超吸收性聚合物的连续方法,其包括提供含有溶解氧的酸性液体含水单体混合物; 连续地将含水单体混合物进料到反应器中; 在进入反应器之前将碳酸盐或碳酸氢盐引入含水单体混合物中,从而形成包含二氧化碳和至少一部分溶解氧的气相,气相分散在液相中; 在气体/液体混合物进入反应器之前或之后立即进行至少部分相分离,并至少部分除去分离的气相; 将反应器中的液相进行自由基聚合以获得超吸收性聚合物,并从反应器中连续除去超吸收性聚合物。

    SUPERABSORBING POLYMERS WITH RAPID ABSORPTION PROPERTIES AND METHOD FOR PRODUCING THE SAME
    7.
    发明申请
    SUPERABSORBING POLYMERS WITH RAPID ABSORPTION PROPERTIES AND METHOD FOR PRODUCING THE SAME 有权
    具有快速吸收性能的超吸收聚合物及其制造方法

    公开(公告)号:US20140312273A1

    公开(公告)日:2014-10-23

    申请号:US14352091

    申请日:2012-11-12

    IPC分类号: A61L15/22 B01J20/30 B01J20/26

    摘要: This invention relates to a method for producing a water-absorbing polymer, including the following steps: (i) mixing (α1) 0.1 to 99.999 wt % polymerizable, ethylenically unsaturated, acid-group-containing monomers; (α2) 0 to 70 wt % polymerized ethylenically unsaturated, monomers copolymerizable with (α1); (α3) 0.00 1 to 10 wt %, cross-linking agent(s); (α4) 0 to 30 wt % water-soluble polymers; and (α5) 0 to 20 wt % additive(s), wherein the total quantity by weight of (α1) to (α5) amounts to 100 wt %, (ii) radical polymerization while cross-linking, in order to form a hydrogel polymer, (iii) drying the hydrogel polymer, (iv) grinding and sifting the water-absorbing polymer, (v) surface post-cross-linking the hydrogel polymer, and (vi) drying and processing the polymer, wherein, before the admixture of the initiator and the start of radical polymerization, 0.01 to 5 wt % of a surfactant, relative to acrylic acid, 0.01 to 5 wt % foaming agent, are added.

    摘要翻译: 本发明涉及一种吸水性聚合物的制造方法,包括以下步骤:(i)将(α1)0.1〜99.999重量%的可聚合的烯属不饱和的含酸基单体混合; (α2)0-70重量%聚合的烯属不饱和单体,可与(α1)共聚的单体; (α3)0.001-10重量%,交联剂; (α4)0〜30重量%水溶性聚合物; 和(α5)0〜20重量%的添加剂,其中(α1)〜(α5)的总量为100重量%,(ii)交联时的自由基聚合,以形成水凝胶 聚合物,(iii)干燥水凝胶聚合物,(iv)研磨和筛选吸水聚合物,(v)表面后交联水凝胶聚合物,和(vi)干燥和加工聚合物,其中在混合物 的引发剂和自由基聚合的开始,添加相对于丙烯酸的0.01〜5重量%的表面活性剂,0.01〜5重量%的发泡剂。

    Hydrolytically Stable Postcrosslinked Superabsorbents
    8.
    发明申请
    Hydrolytically Stable Postcrosslinked Superabsorbents 失效
    水解稳定的后交联超吸收剂

    公开(公告)号:US20080214740A1

    公开(公告)日:2008-09-04

    申请号:US11885250

    申请日:2006-02-24

    IPC分类号: C08F8/30

    摘要: The present invention relates to a process for producing postcrosslinked water-absorbing polymeric formations, comprising the steps of contacting water-absorbing polymeric formations P1 obtained by polymerization of ethylenically unsaturated acid-functional monomers or salts thereof in the presence of a crosslinker with a fluid F1 comprising a postcrosslinker, heating the water-absorbing polymeric formations in contact with the fluid F1 to a temperature in a range from 40 to 300° C. to obtain postcrosslinked water-absorbing polymeric formations P2, the water-absorbing polymeric formations P1 having a thermal stability, as determined in accordance with the test method described herein, of less than 3.0%. The invention also relates to water-absorbing polymeric formations, to the water-absorbing polymeric formations obtainable by this process, to water-absorbing polymeric formations based on crosslinked carboxyl-bearing monomers, to a composite comprising water-absorbing polymeric formations and a substrate, to a process for producing a composite, to a composite obtainable by this process, to chemical products comprising water-absorbing polymeric formations or a composite, to the use of water-absorbing polymeric formations or of a composite in chemical products and also to the use of triallyl isocyanurate as an internal crosslinker in the production of water-absorbing polymeric formations based on crosslinked carboxyl-bearing monomers.

    摘要翻译: 本发明涉及一种生产后交联的吸水聚合物地层的方法,包括以下步骤:通过烯键式不饱和酸官能单体或其盐的聚合获得的吸水聚合物地层P 1 存在具有包含后交联剂的流体F 1 N的交联剂,将与流体F 1 1接触的吸水聚合物层加热到40〜 300℃以获得后交联的吸水聚合物组合物P 2,根据测试方法测定的具有热稳定性的吸水性聚合物组合物P 1 <1> 如本文所述,小于3.0%。 本发明还涉及吸水聚合物地层,可通过该方法获得的吸水聚合物地层,基于交联的含羧基单体的吸水聚合物地层,包括吸水聚合物地层和基底的复合材料, 涉及通过该方法可获得的复合材料的方法,涉及包含吸水聚合物结构或复合材料的化学产品,使用吸水聚合物结构或化学产品中的复合材料,以及使用 的三烯丙基异氰脲酸酯作为内部交联剂在基于交联的含羧基单体的吸水性聚合物地层的生产中。

    Process for producing improved absorbent polymers by means of cryogenic grinding
    10.
    发明授权
    Process for producing improved absorbent polymers by means of cryogenic grinding 有权
    通过低温研磨生产改进的吸收性聚合物的方法

    公开(公告)号:US08859701B2

    公开(公告)日:2014-10-14

    申请号:US13876736

    申请日:2011-10-05

    摘要: A process for producing a water-absorbing polymer comprises: (i) mixing (α1) 0.1-99.99% by weight of ethylenically unsaturated monomers containing acid groups or salts thereof, or ethylenically unsaturated monomers including a protonated or quaternized nitrogen, or mixtures thereof, (α2) 0-70% by weight of ethylenically unsaturated monomers copolymerizable with (α1), (α3) 0.001-10% by weight of one or more crosslinkers, (α4) 0-30% by weight of water-soluble polymers, and (α5) 0-20% by weight of one or more assistants, where the sum of the weights (α1) to (α5) is 100%; (ii) free-radical polymerization with crosslinking to form an untreated hydrogel polymer; (iii) coarse comminution of the untreated hydrogel polymer to give pieces having a diameter from 0.1 mm to 5.0 cm; (iv) cooling and grinding the untreated hydrogel polymer; (v) drying the untreated hydrogel polymer after grinding at a temperature from 85° C. to 260° C.; (vi) postcrosslinking the hydrogel polymer and (vii) drying the water-absorbing polymer.

    摘要翻译: 制备吸水性聚合物的方法包括:(i)将(α1)0.1-99.99重量%的含有酸基团的烯属不饱和单体或包含质子化或季铵化的氮的烯属不饱和单体或其混合物, (α2)0-70重量%的可与(α1),(α3)0.001-10重量%的一种或多种交联剂共聚的烯属不饱和单体,(α4)0-30重量%的水溶性聚合物,和 (α5)0-20重量%的一种或多种助剂,其中权重(α1)至(α5)之和为100%; (ii)通过交联进行自由基聚合以形成未处理的水凝胶聚合物; (iii)未经处理的水凝胶聚合物的粗粉碎,得到直径为0.1mm至5.0cm的片; (iv)冷却和研磨未处理的水凝胶聚合物; (v)在85℃至260℃的温度下研磨后将未处理的水凝胶聚合物干燥; (vi)将水凝胶聚合物后交联,和(vii)干燥吸水聚合物。