Method for preparing superabsorbent resin and superabsorbent resin prepared thereby

    公开(公告)号:US10066063B2

    公开(公告)日:2018-09-04

    申请号:US15502686

    申请日:2016-04-20

    Applicant: LG Chem, Ltd.

    Abstract: Disclosed is a method of preparing a superabsorbent polymer, including a) drying and pulverizing a hydrogel polymer, and then classifying into a first fine powder having a particle size of less than 150 μm and a base polymer having a particle size of 150 to 850 μm; b) mixing a portion of the first fine powder, water and an additive, thus preparing a first fine-powder regranulate; c) passing the first fine-powder regranulate through a chopper and then performing drying and pulverizing; and d) classifying the pulverized first fine-powder regranulate into a superabsorbent polymer having a particle size of 150 to 850 μm and a second fine powder having a particle size of less than 150 μm, thus yielding the superabsorbent polymer.

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