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High-strength interpenetrating-polymer-network type water-absorbent resin, and preparation method thereof

An interpenetrating network type, water-absorbing resin technology, applied in the field of polymer material preparation, can solve the problems of limited strength improvement of cross-linking agent, complicated process conditions, complex cross-linking agent, etc., and achieves improved toughness and strength, simple raw materials, The effect of easy availability of raw materials

Inactive Publication Date: 2018-05-11
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, various modification methods have been used to increase the gel strength of water-absorbent resins. For example, Guan Haiping et al. The polyunsaturated monomer obtained by the amide reaction is used as a cross-linking agent to react with acrylamide and acrylic acid to prepare a water-absorbent resin. The process reaction is relatively complicated, and there is no commercially available product at present, which is not conducive to industrialization, and the improvement of the strength of the crosslinking agent is also relatively limited; Cao Yongyi et al. In the preparation process, a self-made molecular sieve material code-named MCM-41 was introduced for copolymerization to prepare an inorganic-organic composite water-absorbing resin material. The phase suspension polymerization process uses a large amount of organic solvents and the process conditions are complex and difficult to control, which will also have a certain impact on the environment

Method used

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  • High-strength interpenetrating-polymer-network type water-absorbent resin, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] After dissolving 2 parts of polyvinyl alcohol in water, continue to add 20 parts of acrylamide, 10 parts of acrylic acid with a neutralization degree of 50%, and 5 parts of acryloyloxyethyl dimethyl benzyl ammonium chloride (other polymerizable monomers) , 0.05 parts of N,N-methylenebisacrylamide (cross-linking agent A), 0.2 parts of glutaraldehyde (cross-linking agent B), stirred evenly and dissolved, then transferred the reaction liquid to a reactor with stirring, condensation and thermometer In the process, nitrogen was passed for 30 minutes to remove oxygen, and then 0.05 parts of ammonium persulfate was added in the nitrogen atmosphere, and the temperature was adjusted to 60°C for reaction. After the viscosity was increased, the stirring was stopped and maintained for 2 hours. After the reaction, the product was taken out, cut and granulated, 105 After drying at ℃, it was crushed to obtain granular water-absorbing resin.

Embodiment 2

[0029] After dissolving 5 parts of polyvinyl alcohol in water, continue to add 10 parts of acrylamide, 2 parts of acrylic acid with a neutralization degree of 80%, 1 part of hydroxyethyl methacrylate (other polymerizable monomers), 0.01 part of dimethyl dimethacrylate Allyl ammonium chloride (cross-linking agent A), 0.8 parts of glutaraldehyde (cross-linking agent B), stirred evenly and dissolved, then transferred the reaction solution to a reactor with stirring, condensation and thermometer, and nitrogen for 30 minutes to remove After oxygen, add 0.01 part of potassium persulfate in a nitrogen atmosphere, adjust the temperature to 60°C for reaction, stop stirring after increasing viscosity and maintain it for 6 hours. After the reaction, take out the product, cut it, granulate it, dry it at 105°C, and crush it to obtain granular water-absorbing resin.

Embodiment 3

[0031] After dissolving 3 parts of polyvinyl alcohol in water, continue to add 15 parts of acrylamide, 6 parts of acrylic acid with a neutralization degree of 70%, 3 parts of vinyl acetate (other polymerizable monomers), 0.03 parts of N,N-methylene Bisacrylamide (cross-linking agent A), 0.5 parts of glutaraldehyde (cross-linking agent B), stirred evenly and dissolved, then transferred the reaction solution to a reactor equipped with stirring, condensation and thermometer, passed nitrogen gas for 30 minutes to deoxygenate Add 0.03 parts of ammonium persulfate in a nitrogen atmosphere, adjust the temperature to 30°C for reaction, stop stirring after increasing the viscosity and maintain it for 6 hours. After the reaction, the product is taken out, cut, granulated, dried at 105°C and crushed to obtain granular water-absorbent resin.

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Abstract

The invention relates to a high-strength interpenetrating-polymer-network type water-absorbent resin, and a preparation method thereof, belonging to the field of preparation of high polymer materials.The high-strength interpenetrating-polymer-network type water-absorbent resin comprises the following raw materials: 10 to 20 parts of acrylamide monomers, 2 to 10 parts of acrylic acid monomers, 1 to 5 parts of other polymerizable monomers, 0.01 to 0.05 part of a cross-linking agent A, 0.2 to 0.8 part of a cross-linking agent B, 2 to 5 parts of a reactive water-soluble polymer and 0.01 to 0.05 part of an initiator, with the balance being water. The interpenetrating-polymer-network type water-absorbent resin substantially improves the toughness and strength of gel after water absorption on the premise of maintaining water absorption ability; the raw materials are simple and easily available; and a conventional solution polymerization process is employed, which is beneficial for industrialscale-up production of the water-absorbent resin.

Description

technical field [0001] The invention belongs to the field of polymer material preparation, in particular to a high-strength interpenetrating network water-absorbing resin and a preparation method thereof. Background technique [0002] Superabsorbent resin can absorb hundreds to thousands of times of its own weight in water. After absorbing water, it also has the function of retaining water. Under certain conditions, water can be released for utilization. Adding less than 0.2wt% superabsorbent resin to the soil can keep the soil sufficient water for the growth of plants for a long time, improve the germination rate of seeds and the survival rate of seedlings, so in desert greening, It has been applied in many fields such as agricultural water retention and tree planting; in the medical and health field, as an absorbent material, it is widely used in products such as baby diapers and sanitary napkins; It can be used for water leakage prevention, water plugging and profile con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/56C08F220/06C08F220/34C08F222/38C08F220/28C08F226/02C08F218/08C08L33/26C08L29/04
CPCC08F220/56C08L33/26C08L2205/04C08L29/04C08F220/06C08F220/281C08F226/02C08F220/34C08F222/385
Inventor 王慧珺李海涛朱魁
Owner CHINA PETROLEUM & CHEM CORP
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