专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

2. 发明公开

EP3546503A1 SUPERABSORBENT POLYMER PREPARATION METHOD 有权
公开(公告)号：EP3546503A1
公开(公告)日：2019-10-02
申请号：EP18871353.1
申请日：2018-10-15
申请人： LG Chem, Ltd.
发明人： KIM, Moo Kon , LEE, Sang Gi , NAM, Hye Mi , LEE, Chang Hun , KIM, Tae Yun
IPC分类号： C08J3/24 , C08F20/06 , C08F2/44
摘要： The present invention provides a method for preparing a super absorbent polymer which enables production of a super absorbent polymer capable of exhibiting an excellent absorption rate by including a uniform porous structure through a simple and economical process. The method for preparing a super absorbent polymer includes the steps of: performing a crosslinking polymerization of a water-soluble ethylenically unsaturated monomer having an acidic group of which at least a part is neutralized in the presence of an internal crosslinking agent to form a hydrogel polymer containing a first crosslinked polymer; drying and pulverizing the hydrogel polymer; classifying the pulverized polymer into polymer particles having a particle size of at least 10 to 150µm, polymer particles having a particle size of 150 to 200 µm, and polymer particles having a particle size of 200 to 850 µm to form a base polymer powder having a particle size of 150 to 850 µm; and surface-crosslinking the base polymer powder, wherein in the crosslinking polymerization step, the foaming polymerization proceeds in the presence of polymer particles having an average particle size of 10 to 200 µm obtained in the classifying step and an anionic surfactant.

IPRDB

热门服务

关于我们

友情链接

联系方式