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    • 5. 发明公开
    • VERFAHREN ZUR HERSTELLUNG VON WASSERABSORBIERENDEN POLYMEREN MIT HOHER ABSORPTIONSGESCHWINDIGKEIT
    • VERFAHREN ZUR HERSTELLUNG VON WASSERABSORBIERENDEN POLYMEREN MIT HOHER吸收GESCHWINDIGKEIT
    • EP2699609A1
    • 2014-02-26
    • EP12711884.2
    • 2012-04-03
    • Evonik Degussa GmbH
    • WATTEBLED, LaurentLOICK, ChristophHARREN, JörgLEININGER, Stefan
    • C08F220/06C08F2/44A61L15/00
    • The invention relates to a process for producing a water-absorbing polymer composition, comprising the process steps of (i) mixing (α1) 0.1 to 99.999% by weight, preferably 20 to 98.99% by weight and more preferably 30 to 98.95% by weight of polymerized, ethylenically unsaturated monomers containing acid groups or salts thereof or polymerized, ethylenically unsaturated monomers including a protonated or quaternized nitrogen, or mixtures thereof, particular preference being given to mixtures including at least ethylenically unsaturated monomers containing acid groups, preferably acrylic acid, (α2) 0 to 70% by weight, preferably 1 to 60% by weight and more preferably 1 to 40% by weight of polymerized, ethylenically unsaturated monomers copolymerizable with (α1), (α3) 0.001 to 10% by weight, preferably 0.01 to 7% by weight and more preferably 0.05 to 5% by weight of one or more crosslinkers, (α4) 0 to 30% by weight, preferably 1 to 20% by weight and more preferably 5 to 10% by weight of water-soluble polymers, and (α5) 0 to 20% by weight, preferably 0.01 to 7% by weight and more preferably 0.05 to 5% by weight of one or more assistants, where the sum of their weights (α1) to (α5) is 100% by weight, (ii) free-radical polymerization with crosslinking to form a water-insoluble aqueous untreated hydrogel polymer, (iii) comminuting and drying the hydrogel polymer, (iv) optionally grinding and sieving the water-absorbing polymer, (v) surface postcrosslinking the ground hydrogel polymer and (vi) drying and finishing the water-absorbing polymer, wherein blowing agents having a particle size of 100 µm to 900 µm are added to the aqueous monomer solution prior to the addition of the initiator and the start of the free-radical polymerization.
    • 一种制备吸水性聚合物组合物的方法,包括以下步骤:(i)将(α1)0.1至99.999重量%的含酸基团的烯键式不饱和单体或其盐(α2)与0至70重量%的聚合 可与(α1),(α3)0.001至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,其中其重量(α1)至(α5)的总量为100重量%,(ii)通过交联形成水不溶性水性未处理水凝胶聚合物的自由基聚合,以及表面后交联地面 在添加引发剂和开始自由基聚合之前,将其中具有100μm至900μm的粒径的发泡剂加入到单体水溶液中的水凝胶聚合物。