Method for preparing super-absorbent resin and super-absorbent resin prepared thereby

一种超吸收性、聚合物的技术，应用在吸收垫、医药科学、绷带等方向，能够解决离心保留容量吸收度减小等问题

Active Publication Date: 2017-02-22
LG CHEM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although the absorption rate of superabsorbent polymers can be improved by these methods, there is a limitation that the centrifuge retention capacity (CRC) and absorbency under pressure (AUP) of the polymer are relatively reduced

Method used

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  • Method for preparing super-absorbent resin and super-absorbent resin prepared thereby
  • Method for preparing super-absorbent resin and super-absorbent resin prepared thereby
  • Method for preparing super-absorbent resin and super-absorbent resin prepared thereby

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0088] 400 parts by weight of ion-exchanged water was added to a 3L four-necked flask reactor equipped with a stirrer, a thermometer, a nitrogen gas supplier, and a circulating condenser, nitrogen gas was supplied into the reactor while stirring, and the reactor was heated under a nitrogen atmosphere to 75°C.

[0089] Subsequently, 2 parts by weight of ammonium persulfate was added to the reactor and the resulting solution was completely dissolved. Then, by making 600 parts by weight of methoxypolyethylene glycol monomethacrylate (the average number of moles of ethylene oxide (EO) added: about 50 moles), 96.6 parts by weight of methacrylic acid and 190 parts by weight of water The monomer aqueous solution prepared by mixing, the mixed solution of 5 parts by weight of 3-mercaptopropionic acid and 5 parts by weight of water, and 150 parts by weight of 3% by weight ammonium persulfate aqueous solution were continuously added to the reactor at a uniform speed within 4 hours. Imme...

preparation example 2

[0093] Polycarboxylate copolymer (weight-average molecular weight: 40,000) was prepared in the same manner as in Preparation Example 1, except that after completing the polymerization reaction as in Preparation Example 1, it was passed through 30% by weight of triethanolamine aqueous solution and about 1 hour.

preparation example 3

[0095] A polycarboxylic acid-based copolymer (weight average molecular weight: 40,000) was prepared in the same manner as in Preparation Example 2 except that it was neutralized with an aqueous sodium hydroxide solution instead of an aqueous solution of triethanolamine.

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Abstract

The present invention relates to a method for preparing a super-absorbent resin. The method for preparing a super-absorbent according to the present invention can produce a super-absorbent resin, which has a fast absorption rate and high permeability while having excellent absorption characteristics, such as water retention capacity and absorbency under pressure, by using a polycarboxylic acid-based copolymer at the time of polymerization of a hydrous gel phase polymer.

Description

[0001] Cross References to Related Applications [0002] This application claims priority based on Korean Patent Application No. 10-2014-0167735 filed on November 27, 2014 and Korean Patent Application No. 10-2015-0155892 filed on November 6, 2015 with the Korean Intellectual Property Office rights, the contents of which are incorporated herein by reference in their entirety. technical field [0003] The present invention relates to a method for producing a superabsorbent polymer having a fast absorption rate and a high saline flow conductivity while having excellent absorption characteristics such as centrifuge retention capacity and absorbency under pressure. Background technique [0004] Super absorbent polymer (SAP) is a synthetic polymer material capable of absorbing about 500 times to about 1,000 times its own weight in water, also known as super absorbent material (SAM) , Absorbent gel material (AGM), etc. Such superabsorbent polymers were first practically used in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F2/44C08J3/075C08F20/06C08F220/06C08F222/38C08J3/24C08F2/10C08F283/06
CPCC08F2/10C08F2/44C08F20/06C08F220/06C08F283/065C08J3/075C08J3/24C08J2333/02C08F20/10C08F220/10C08F265/02C08F6/008C08F285/00C08F290/062C08J2433/10C08J3/245C08F222/385C08L33/02C08F220/286A61L15/24A61L15/60C08F265/04C08J3/12C08J2351/00C08F2/48
Inventor 李勇勋安泰彬韩章善徐成钟
Owner LG CHEM LTD
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