Lg Chem, Ltd

Ui Seok Chung

Gicheul Kim

Kyu Pal Kim

Gyunhyeok Ahn

Hyeon Sik Choi

Yoon Jae Min

Yu Jin Kim

Seul Ah Lee

Kiyoul Yoon

Seongkyun Kang

The present disclosure relates to a super absorbent polymer, and a preparation method thereof. More specifically, it relates to a super absorbent polymer prepared such that agglomeration between pulverized particles is suppressed, and drying efficiency and uniformity of particle size distribution are improved by including a carboxylic acid-based additive having a specific structure and hydrophobic particles before drying the hydrogel polymer, and a preparation method thereof.

Super absorbent polymer and preparation method thereof

A method for preparing a super absorbent polymer is directed to appropriate control of the water content of the super absorbent polymer by hydration to suppress crushing during transfer. The method also provides suppression of deterioration of physical properties of the super absorbent polymer such as production of giant particles and nonuniformity of water content during a hydration step.

Method for preparing super absorbent polymer

A method for preparing a super absorbent polymer and a superabsorbent polymer prepared from the same are disclosed herein. In some embodiments, a method includes mixing super absorbent polymer particles, water and an additive form a hydrated super absorbent polymer, wherein the super absorbent polymer particles comprise a base polymer powder including a cross-linked polymer polymerized from a water-soluble ethylenically unsaturated monomer having an acidic group of which at least a part is neutralized, and a surface cross-linked layer formed on the base polymer powder, wherein the surface cross-linked layer is formed by further cross-linking the cross-linked polymer, and wherein the additive including a polyoxyalkylene aliphatic hydrocarbon ether carboxylic acid. The method can appropriately control the water content of the super absorbent polymer by water-addition or the like to suppress crushing or the like during transfer, and also can suppress deterioration of physical properties.

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Daejeon, South Korea

Ui Seok Chung