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Super absorbent polymer

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，能够解决超吸收性聚合物分离、吸收度减小等问题，达到优异吸收性、舒适穿戴感、优异初始吸收性的效果

Active Publication Date: 2016-03-09
LG CHEM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, although permeability is improved by adding silica or clay, there is a problem that water retention capacity or absorbency under load decreases in proportion to it, and superabsorbent polymerization easily occurs due to external physical shock during transportation material separation
In addition, superabsorbent polymers that exhibit high absorbency under load while maintaining liquid permeability, water retention capacity, and absorbency under load at predetermined levels or higher have not been developed so that when applied to diapers and the like, , exhibiting a high absorption rate in practice

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0135] In a 2L glass reactor surrounded by a jacket (through which a heating medium pre-cooled at 25° C. was circulated), 500 g of acrylic acid was mixed with 11 g of 0.5% IRGACURE 819 initiator diluted in acrylic acid (110 ppm, based on monomer Composition) mixing, inject 5% polyethylene glycol diacrylate (PEGDA, molecular weight 400, curing dose 200mJ / cm2) through acrylic acid dilution of 26g 2 ) solution (A solution), and inject 14g of trimethylolpropane triacrylate (ethoxylated TMPTA, TMP (EO) 9TA, M-3190MiwonSpecialtyChemicalCo. , Ltd., curing dose 200mJ / cm 2 ) solution (B solution), and then slowly add 800 g of 24% caustic soda solution (C solution) dropwise. The degree of neutralization of acrylic acid in sodium acrylate obtained as a water-soluble ethylenically unsaturated monomer was 70 mol%.

[0136] When it was determined that the temperature of the mixture was raised to 80°C or higher by the heat of neutralization when mixing the two solutions, the mixture was al...

Embodiment 2

[0143] A superabsorbent polymer was prepared in the same manner as in Example 1, except that 0.2 g of diatomaceous earth was used instead of the Aerosil 200 treated in the drying process in Example 1.

Embodiment 3

[0145] A superabsorbent polymer was prepared in the same manner as in Example 1, except that, for the surface treatment of the base polymer obtained in Example 1, 100 g of the base polymer was mixed with 3 g of water, 1.0 g of ethylene carbonate Esters and 0.1 g of Aerosil200 prepared cross-linking agent solution were mixed, the surface cross-linking reaction was carried out at 190°C for 30 minutes, and then the resultant was pulverized and sieved to obtain surface-treated superabsorbent polymer with a particle size of 150 μm to 850 μm things.

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Abstract

The present invention relates to a super absorbent polymer which has excellent initial water absorption and which is watertight under pressure, even after time has elapsed, and concurrently optimizes, to predetermined ranges, centrifuge repair capability (CRC), absorbency under load (AUL), gel bed permeability (GBP), and absorption rate under pressure, etc. of the super absorbent polymer, thereby being capable of improving the physical properties of the final diaper, and thereby being capable of manufacturing a diaper to which ultra-thin technology has been applied.

Description

technical field [0001] The present invention relates to superabsorbent polymers which have excellent basic physical properties such as absorbency, etc., and which exhibit a high absorption rate under load. Background technique [0002] Super Absorbent Polymer (SuperAbsorbent Polymer, SAP) is a synthetic polymer material that can absorb 500 to 1000 times its own weight of water. Various developers name SAP different names, such as SAM (SuperAbsorbentMaterial, superabsorbent material), AGM (AbsorbentGelMaterial, absorbent gel material) and so on. Since the practical application of this superabsorbent polymer to sanitary products, it has now been widely used not only in sanitary products such as children's disposable diapers, etc., but also in water-retaining soil products for gardening, civil engineering and construction Water-stop materials, sheets for seedlings, fresh-keeping agents and poultice materials in the field of food distribution, etc. [0003] As a method for pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F2/08C08F20/00C08J3/24C08J3/075A61F13/49
CPCB01J2220/68A61L15/60B01J20/267C08F2/00
Inventor 李相琪金美永李锺旻张珉硕
Owner LG CHEM LTD
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