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    • 3. 发明授权
    • Method for the secondary cross-linking of hydrogels with N-acyl-2-oxazolidinones
    • 水凝胶与N-酰基-2-恶唑烷酮二次交联的方法
    • US06559239B1
    • 2003-05-06
    • US09831920
    • 2001-05-29
    • Ulrich RiegelMatthias WeismantelVolker FrenzThomas DanielFritz Engelhardt
    • Ulrich RiegelMatthias WeismantelVolker FrenzThomas DanielFritz Engelhardt
    • C08F830
    • C08F8/30C08J3/245C08J2300/14C08J2333/02C08F220/06
    • Liquid-absorbent polymers are prepared by a process for the gel and/or surface postcrosslinking of water-absorbent polymers by the polymer being treated with a surface postcrosslinking solution and being postcrosslinked and dried during and after the treatment by raising the temperature, wherein the surface postcrosslinking solution comprises as crosslinker a compound of the formula I where R1, R2, R3 and R4 are independently hydrogen, C1-C12-alkyl, C1-C12-alkenyl, C6-C12-aryl or C1-C12-alkoxy, R5 is C1-C16-alkyl, C1-C4-hydroxyalkyl, C6-C12-aryl, C1-C16-alkenyl or a group of the formula —(CH2)n—COOH or —(CH2)n—SO3H in the form of the acid or a respective metal salt, ammonium salt or triethanolammonium salt thereof or —(CH2—CH2—O—)m—R6, R6 is hydrogen or C1-C16-alkyl, n is from 1 to 10, m is from 1 to 20 dissolved in an inert solvent, and are used in hygiene articles, packaging materials and nonwovens.
    • 通过用表面后交联溶液处理的聚合物进行凝胶和/或表面后吸附吸水性聚合物的方法制备液体吸收聚合物,并且在处理之间和之后通过升高温度进行后交联和干燥,其中表面 后交联溶液包含作为交联剂的式I化合物,其中R 1,R 2,R 3和R 4独立地是氢,C 1 -C 12 - 烷基,C 1 -C 12 - 烯基,C 6 -C 12 - 芳基或C 1 -C 12 - 烷氧基,R 5是C 1 -C 16 - 烷基,C 1 -C 4 - 羟基烷基,C 6 -C 12 - 芳基,C 1 -C 16 - 烯基或式 - (CH 2)n -COOH或 - (CH 2)n -SO 3 H的基团,其形式为酸或相应的 金属盐,铵盐或三乙醇铵盐或 - (CH 2 -CH 2 -O-)m -R 6,R 6是氢或C 1 -C 16 - 烷基,n为1至10,m为1至20,溶于惰性溶剂 ,用于卫生用品,包装材料和无纺布。
    • 7. 发明授权
    • Production of a water-absorbing resin to which a particulate additive is admixed
    • 生产混合有微粒添加剂的吸水性树脂
    • US08349946B2
    • 2013-01-08
    • US12861338
    • 2010-08-23
    • Uwe StuevenRüdiger FunkMatthias WeismantelThomas DanielAnnemarie HillebrechtDominicus van EsbroeckKarl J. Possemiers
    • Uwe StuevenRüdiger FunkMatthias WeismantelThomas DanielAnnemarie HillebrechtDominicus van EsbroeckKarl J. Possemiers
    • C08G18/63
    • C08F2/44C08F220/06C08F222/1006
    • 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.
    • 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。
    • 8. 发明申请
    • Production of a Water-Absorbing Resin to Which a Particulate Additive is Admixed
    • 混合颗粒添加剂的吸水树脂的生产
    • US20100324212A1
    • 2010-12-23
    • US12861338
    • 2010-08-23
    • Uwe StuevenRüdiger FunkMatthias WeismantelThomas DanielAnnemarie HillebrechtDominicus van EsbroeckKarl J. Possemiers
    • Uwe StuevenRüdiger FunkMatthias WeismantelThomas DanielAnnemarie HillebrechtDominicus van EsbroeckKarl J. Possemiers
    • C08K3/34
    • C08F2/44C08F220/06C08F222/1006
    • 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.
    • 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。
    • 9. 发明授权
    • Production of a water-absorbing resin to which a particulate additive is admixed
    • 生产混合有微粒添加剂的吸水性树脂
    • US07786211B2
    • 2010-08-31
    • US12158502
    • 2006-12-28
    • Uwe StuevenRüdiger FunkMatthias WeismantelThomas DanielAnnemarie HillebrechtDominicus van EsbroeckKarl J. Possemiers
    • Uwe StuevenRüdiger FunkMatthias WeismantelThomas DanielAnnemarie HillebrechtDominicus van EsbroeckKarl J. Possemiers
    • C08G18/63
    • C08F2/44C08F220/06C08F222/1006
    • 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.
    • 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。