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Superabsorbent polymer and its production method

A superabsorbent and polymer technology, applied in the field of superabsorbent polymers, can solve problems such as weakening the internal crosslinking structure, reducing the surface tension of superabsorbent polymers, and reducing the physical properties of water-absorbent polymers.

Active Publication Date: 2020-10-27
LG CHEM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, it is known that superabsorbent polymers tend to reduce their basic absorption properties as the particle diameter decreases
In addition, additives such as surfactants used to form conventional porous structures have disadvantages of lowering the surface tension of superabsorbent polymers and weakening the internal crosslinked structure, thereby lowering the physical properties of water-absorbent polymers, which may also be disadvantageous. Affects the physical properties of hygienic materials
For these reasons, there is a limit to improving the absorption rate by methods conventionally known in the art, and it is difficult to improve the absorption rate while maintaining other physical properties (such as excellent absorption properties)

Method used

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  • Superabsorbent polymer and its production method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0139] Example 1: Production of superabsorbent polymer

[0140] Make the composite airgel of 0.1g production example 1 and 1.25g sodium bicarbonate (NaHCO 3 ) mixed to prepare a foaming composition. The foaming composition was mixed with 100 g of acrylic acid, 0.34 g of polyethylene glycol diacrylate (Mw=598) as a crosslinking agent, 121.5 g of 32% caustic soda (NaOH), 0.008 g of diphenyl (2 , 4,6-trimethylbenzoyl)-phosphine oxide, 0.200 g of sodium persulfate, and 36.6 g of water were mixed to produce a monomer composition with a monomer concentration of 47% by weight.

[0141]Subsequently, the monomer composition was introduced through a feeder of a polymerization reactor equipped with a continuously moving conveyor belt. Irradiate ultraviolet rays with ultraviolet irradiation device (irradiation amount 2mW / cm 2 ) for UV polymerization for 2 minutes to produce a hydrogel polymer.

[0142] The hydrogel polymer was transferred to a cutter and cut to 0.2 cm size. At this t...

Embodiment 2

[0144] Example 2: Production of superabsorbent polymer

[0145] A superabsorbent polymer was produced in the same manner as in Example 1 except that a foaming composition containing 1 g of the composite airgel of Production Example 1 and 1 g of sodium bicarbonate was used.

Embodiment 3

[0146] Example 3: Production of superabsorbent polymer

[0147] A superabsorbent polymer was produced in the same manner as in Example 1 except that a foaming composition containing 0.3 g of the composite airgel of Production Example 2 and 1 g of sodium bicarbonate was used.

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Abstract

The present invention relates to a superabsorbent polymer and a production method thereof capable of producing a superabsorbent polymer exhibiting a more improved absorption rate while maintaining excellent absorption characteristics.

Description

technical field [0001] Cross References to Related Applications [0002] This application claims priority and benefit from Korean Patent Application No. 10-2016-0029838 filed with the Korean Intellectual Property Office on March 11, 2016, the disclosure of which is incorporated herein by reference in its entirety. [0003] The present invention relates to a superabsorbent polymer and a production method thereof capable of producing a superabsorbent polymer exhibiting a more improved absorption rate while maintaining excellent absorption characteristics. Background technique [0004] Superabsorbent polymer (SAP) is a synthetic polymer material capable of absorbing about 500 to about 1000 times its own weight in water, and is given different names by various manufacturers, such as SAM (Super Absorbent Material ), AGM (absorbent gel material), etc. Such superabsorbent polymers have begun to be practically used in hygiene products, and they are now widely used in the preparat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J3/075C08J3/24C08K3/34C08F20/06C08J3/12C08K7/26C08L33/02
CPCC08F20/06C08J3/075C08J3/12C08K3/34C08K7/26C08L33/02C08J2333/08C08J2333/10C08J3/245C08J2333/02C08J3/24C08K3/36
Inventor 李胜模金琪哲金起贤李悌均金钟勋姜泰京
Owner LG CHEM LTD
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