The present invention relates to a process for producing a water-absorbing polymer, comprising the process steps of (i) mixing (α1) 0.1 to 99.999% by weight of polymerizable, ethylenically unsaturated monomers containing acid groups, or salts thereof, (α2) 0 to 70% by weight of polymerized, ethylenically unsaturated monomers copolymerizable with (α1), (α3) 0.001 to 10% by weight of one or more crosslinkers, where the sum of the weights (α1) to (α3) is 100% by weight, (ii) free-radical polymerization with crosslinking to form a water-insoluble, aqueous untreated hydrogel polymer, (iii) drying the hydrogel polymer, (iv) grinding and sieving the water-absorbing polymer to size, wherein the aqueous monomer solution, is admixed with 0.01 to 5% by weight of at least one surfactant and optionally 0.01 to 5% by weight of a blowing agent having a particle size of 10 μm to 900 μm, based on the water-absorbing polymer.
本发明涉及一种生产吸
水聚合物的工艺,包括以下工艺步骤(i)将(α1)0.1~99.999%(重量)的可聚合的含酸基的
乙烯基不饱和单体或其盐,(α2)0~70%(重量)的可与(α1)共聚的聚合的
乙烯基不饱和单体,(α3)0.001至10%(重量)的一种或多种
交联剂,其中(α1)至(α3)的重量之和为100%(重量),(ii)自由基聚合交联,形成不溶于
水的未经处理的
水凝胶聚合物,(iii)干燥
水凝胶聚合物,(iv)研磨和筛分吸
水聚合物,其中单体
水溶液中掺入0.01至5%(按重量计)的至少一种表面活性剂和可选的0.01至5%(按重量计)的发泡剂,发泡剂的粒径为10微米至900微米(以吸
水聚合物为基准)。