Lg Chem, Ltd

Kyu Pal Kim

Gi Cheul Kim

Ki Hyun Kim

Sang Gi Lee

Seul Ah Lee

Gicheul Kim

Chang Sun Han

Chul Hee Ryu

Sung Soo Park

Won Mun Choi

Won Taeck Lim

Bhom Ri Kim

Ui Seok Chung

Gyunhyeok Ahn

Yoon Jae Min

Yong Hun Lee

Sang Hwa Lee

Kyunghoon Min

Jinuk Choi

Seung Mo Lee

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 superabsorbent polymer is disclosed herein. In some embodiments, a method includes polymerizing a monomer composition to form a hydrogel polymer, wherein the monomer composition comprises a water soluble ethylenically unsaturated monomer and a polymerization initiator, drying and grinding the hydrogel polymer to prepare a base resin powder, surface cross-linking the base resin powder using a surface cross-linking agent to prepare surface cross-linked base resin powder, and hydrating the surface cross-linked base resin powder by pulse spraying water to prepare a superabsorbent polymer, wherein a scattering index of droplets generated during the pulse spraying is 5 to 10, and wherein the scattering index is calculated in accordance with the following Mathematical Formula 1. The superabsorbent polymer can have an improved moisture content to prevent surface property change of the superabsorbent polymer, and decreased amount of fine powder which improves processability during manufacture of articles using superabsorbent polymer.

Method for preparing superabsorbent polymer

The present invention relates to a super absorbent polymer and a method for producing same. The super absorbent polymer can achieve a high deodorizing function while exhibiting excellent absorption properties. As such, by using the super absorbent polymer, adult diapers having a thin thickness and high deodorizing function can be provided.

Super absorbent polymer and method for producing same

The present invention relates to a super absorbent polymer. The super absorbent polymer contains polymer particles formed of large pores in a certain amount or more, and thus can exhibit large surface area and excellent initial absorption capacity. Therefore, when the super absorbent polymer is used, it can provide a sanitary material such as a diaper or a sanitary napkin which can quickly absorb body fluids and impart a dry and soft touch feeling.

Super absorbent polymer and method for preparing same

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.

The present invention relates to a super absorbent polymer. The super absorbent polymer exhibits excellent initial absorption capacity, and thus can provide a sanitary material such as a diaper or a sanitary napkin which can quickly absorb body fluids and impart a dry and soft touch feeling.

Super absorbent polymer

A method of preparing a superabsorbent polymer, which enables the preparation of the superabsorbent polymer exhibiting an improved absorption rate while maintaining excellent absorption performances is provided. The method of preparing the superabsorbent polymer includes carrying out a crosslinking polymerization of a water-soluble ethylene-based unsaturated monomer having acidic groups which are at least partially neutralized, in the presence of an internal crosslinking agent having a predetermined chemical structure to form a water-containing gel polymer, gel-pulverizing the water-containing gel polymer, drying, pulverizing, and size-sorting the gel-pulverized water-containing gel polymer to form a base polymer powder, and carrying out a surface crosslinking of the base polymer powder by a heat treatment in the presence of a surface crosslinking agent, wherein the gel-pulverizing is carried out by extruding the water-containing gel polymer through a porous plate having a plurality of holes using a screw extruder mounted inside a cylindrical pulverizer under a condition that a chopping index is 28 (/s) or more.

Method of preparing superabsorbent polymer

The present invention relates to a super absorbent polymer and a preparation method thereof, the super absorbent polymer including: surface cross-linked polymer particles prepared by surface cross-linking particles of a base resin, the base resin polymerized from a monomer composition including water-soluble ethylene-based unsaturated monomers having at least partially neutralized acidic groups; and a water-soluble component, wherein the water-soluble component has a weight average molecular weight of 150,000 to 300,000 g/mol. The super absorbent polymer may have high centrifuge retention capacity and excellent permeability at the same time, while having low content of the water-soluble component.

Super absorbent polymer and preparation method thereof

The present invention relates to a superabsorbent polymer having excellent short time free absorbency. The superabsorbent polymer may exhibit excellent centrifuge retention capacity and absorbency under load, as well as excellent short time free absorbency. Thus, it can fundamentally solve the problems of the existing superabsorbent polymer and technical requirement of the art, and can provide various hygienic goods exhibiting more excellent properties.

The present invention relates to a method for a super absorbent polymer. The method for preparing a super absorbent polymer according to the present invention makes it possible to provide a super absorbent polymer in which characteristics such as a centrifuge retention capacity and an absorption rate are improved in a balanced manner.

The present invention relates to a superabsorbent polymer exhibiting excellent heat stability.

A method of preparing absorbent polymer granules is provided. The method of preparing fine particle granules according to the present disclosure may provide granules of which re-breaking is minimized due to a superior binding force between fine particles.

Method of preparing superabsorbent polymer granules

A method of preparing a superabsorbent polymer is provided. The method of preparing the superabsorbent polymer according to the present disclosure is able to provide the superabsorbent polymer having an improved absorption rate while having superior centrifuge retention capacity (CRC) and absorbency under pressure (AUP).

This disclosure relates to a method for preparing super absorbent polymer. The method for preparing super absorbent polymer according to the present invention comprises the steps of performing photopolymerization of a monomer composition comprising water soluble ethylene unsaturated monomers, a thermal polymerization initiator and a photopolymerization initiator at a temperature of 30 to 55&#xb0; C.; performing a thermal polymerization and a photopolymerization at a temperature of 55 to 120&#xb0; C. to form a hydrogel polymer; and drying the hydrogel polymer. According to the present invention, by comprising two polymerization steps including performing photopolymerization at low temperature and then performing thermal polymerization or photopolymerization at high temperature, super absorbent polymer having improved physical properties may be obtained.

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Daejeon, South Korea

Kyu Pal Kim