发明申请
US20160108227A1 SUPERABSORBENT POLYMERS WITH RAPID ABSORPTION PROPERTIES AND PROCESS FOR PRODUCING SAME
审中-公开
具有快速吸收特性的超吸收聚合物及其生产方法
- 专利标题: SUPERABSORBENT POLYMERS WITH RAPID ABSORPTION PROPERTIES AND PROCESS FOR PRODUCING SAME
- 专利标题(中): 具有快速吸收特性的超吸收聚合物及其生产方法
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申请号: US14787636申请日: 2014-04-29
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公开(公告)号: US20160108227A1公开(公告)日: 2016-04-21
- 发明人: Laurent Wattebled , Markus Henn , Rainer Teni
- 申请人: EVONIK DEGUSSA GMBH
- 优先权: DE102013209023.4 20130515
- 国际申请: PCT/EP2014/058670 WO 20140429
- 主分类号: C08L33/14
- IPC分类号: C08L33/14 ; B01J20/26
摘要:
The present invention relates to 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, (α4) water-soluble polymers, and (α5) one or more assistants, where the sum of the weights (α1) to (α5) 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, (v) surface postcrosslinking the ground and sieved hydrogel polymer and (vi) drying and finishing the water-absorbing polymer, wherein 0.01 to 5% by weight of a blowing agent having a particle size of 10 μm to 900 μm are added, based on the hydrogel polymer.
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