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Method for preparing superabsorbent polymer comprising a novel crosslinker compound

A superabsorbent, polymer technology, applied in the field of superabsorbent polymer preparation, capable of addressing the degradation of superabsorbent polymer physical properties such as absorption capacity and permeability degradation, superabsorbent polymer aggregation or hardening over time block, etc., to achieve the effects of improving workability and economical efficiency, excellent deodorizing effect, and excellent absorption characteristics

Active Publication Date: 2019-11-26
LG CHEM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is a problem in that the physical properties of superabsorbent polymers such as absorbency and permeability deteriorate, or agglomeration in which superabsorbent polymers aggregate or harden over time occurs

Method used

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  • Method for preparing superabsorbent polymer comprising a novel crosslinker compound
  • Method for preparing superabsorbent polymer comprising a novel crosslinker compound
  • Method for preparing superabsorbent polymer comprising a novel crosslinker compound

Examples

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preparation example Construction

[0044] One embodiment of the present disclosure provides a method of making a superabsorbent polymer comprising the steps of:

[0045] crosslinking an acrylic acid-based monomer having at least partially neutralized acid groups in the presence of an internal crosslinking agent to form a hydrogel polymer;

[0046] drying the hydrogel polymer to form the base resin; and

[0047] heating the base resin in the presence of a surface crosslinking agent to surface modify the base resin,

[0048] Wherein the internal crosslinking agent comprises a compound represented by the following chemical formula 1:

[0049] [chemical formula 1]

[0050]

[0051] Wherein, in chemical formula 1,

[0052] R 1 and R 2 each independently hydrogen or methyl,

[0053] R 3 and R 4 each independently hydrogen or C1 to C20 alkyl,

[0054] R 5 is a linear or branched C1 to C20 alkylene group substituted with a linear or branched C2 to C10 alkenyl group, or is a linear or branched C2 to C20 alk...

Embodiment

[0182]

Synthetic example 1

[0184]

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Abstract

The present invention relates to a method for preparing a superabsorbent resin comprising a novel cross-linking agent compound. The method for preparing a superabsorbent resin of the present inventioncan prepare a superabsorbent resin comprising a cross-linking agent having a novel structure so as to exhibit excellent absorbency and have excellent deodorizing characteristics. Therefore, accordingto the present invention, no separate additives for deodorizing characteristics are required, and thus the processability and economic feasibility of a preparation process can be improved.

Description

technical field [0001] Cross References to Related Applications [0002] This application claims Korean Patent Application No. 10-2017-0168683 filed with the Korean Intellectual Property Office on December 8, 2017, No. 10-2018-0005095 filed with the Korean Intellectual Property Office on January 15, 2018, and filed in 2018 10-2018-0139993 filed with the Korean Intellectual Property Office on November 14, 2018, the disclosure of which is incorporated herein by reference in its entirety. [0003] The present disclosure relates to methods of making superabsorbent polymers comprising novel crosslinker compounds. Background technique [0004] Super absorbent polymer (SAP) is a synthetic polymer material capable of absorbing 500 to 1000 times its own weight in water. Each manufacturer calls it a different name, for example, SAM (SuperAbsorbency Material, superabsorbent material), AGM (Absorbent Gel Material, absorbent gel material), and the like. Such superabsorbent polymers h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K5/11C08K5/00C08F20/04C08J3/24C08J3/075C08K5/092
CPCC08J3/245C08J2333/02C08F120/06C08F220/06C08F222/102C08F20/04C08J3/075C08J2300/14C08J2333/08C08K5/11
Inventor 李琗俄金起贤金琪哲崔源文林元泽
Owner LG CHEM LTD