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High-performance acrylic water-absorbent resin and preparation method thereof

A water-absorbent resin and acrylic technology, which is applied in the field of high-performance acrylic water-absorbent resin and its preparation, can solve the problems of not being able to obtain, change the growth and development of enzyme activity, and unable to optimize the internal and external linkage structure of the acrylic water-absorbent resin, and achieve the effect of wide application.

Active Publication Date: 2022-01-18
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Although the above existing technologies partially use cycloolefin monomers or borides, they either have nothing to do with the field of acrylic water-absorbent resins, or they only use the biochemical action of boron to change enzyme activity and regulate crop growth and development, and cannot optimize the internal properties of acrylic water-absorbent resins. The externally linked structure, especially the problem of strengthening the surface crosslinking process is not solved, so it is impossible to obtain acrylic water-absorbing resin products with a balanced internally and externally linked structure and excellent performance

Method used

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  • High-performance acrylic water-absorbent resin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] (a) Mix 100g of acrylic acid and 1225g of water, partially neutralize with 155g of caustic soda with a concentration of 32wt%, then add 320g of ammonium sulfate, then add 200g of monomer emulsion, and disperse evenly to obtain a reaction solution, wherein the monomer emulsion consists of 8.5g 1,5,9-Cyclododecatriene and 1.4 g of sodium lauryl sulfate are emulsified in water.

[0064] (b) Control the temperature of the reaction liquid at 90° C., and carry out nitrogen protection at the same time, add 0.5 g of polyethylene glycol diacrylate (ETERMER 226) and 3 g of ammonium persulfate solution with a concentration of 10 wt % after passing nitrogen for 30 min, and react for 5 hours After that, a polymer dispersion is obtained.

[0065] (c) Precipitate, filter, and wash the polymer dispersion with ethanol to obtain a polymer solid, and disperse the polymer solid in 200 g of ethylcyclohexane.

[0066] (d) Add 6g of surface crosslinking aid solution to the product of step (c...

Embodiment 2

[0069] (a) Mix 500g of acrylic acid and 885g of water, partially neutralize it with 435g of caustic soda with a concentration of 32wt%, then add 80g of sodium sulfate, then add 100g of monomer emulsion, and disperse evenly to obtain a reaction solution, wherein the monomer emulsion consists of 2.5g 1,5,9-cyclododecatriene and 0.25g sodium lauryl sulfate are emulsified in water.

[0070] (b) Control the temperature of the reaction solution at 75° C., and carry out nitrogen protection at the same time. Add 0.1 g of ethylene glycol diglycidyl ether and 7.5 g of 10 wt % sodium persulfate solution after passing nitrogen for 30 minutes, and react for 2 hours to obtain polymer dispersion.

[0071] (c) Precipitate, filter, and wash the polymer dispersion with ethanol to obtain a polymer solid, and disperse the polymer solid in 4500 g of heptane.

[0072] (d) Add 75g of surface crosslinking aid solution to the product of step (c), which contains 0.05g of ethylene glycol diglycidyl eth...

Embodiment 3

[0075] (a) Mix 300g of acrylic acid and 835g of water, partially neutralize with 365g of caustic soda with a concentration of 32wt%, then add 200g of ammonium sulfate, then add 300g of monomer emulsion, and disperse evenly to obtain a reaction solution, wherein the monomer emulsion consists of 13.5g 1,5,9-Cyclododecatriene and 1.69g sodium dodecylbenzenesulfonate are emulsified in water.

[0076] (b) Control the temperature of the reaction solution at 75°C, and carry out nitrogen protection at the same time, add 0.75g of polyethylene glycol diacrylate (ETERMER 226) and 6g of 10wt% ammonium persulfate solution after passing nitrogen for 30 minutes, and react for 3 hours After that, a polymer dispersion is obtained.

[0077] (c) Precipitate, filter, and wash the polymer dispersion with ethanol to obtain a polymer solid, and disperse the polymer solid in 1500 g of ethylcyclohexane.

[0078] (d) Add 30 g of surface cross-linking aid solution to the product of step (c), which cont...

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Abstract

The invention discloses high-performance acrylic water-absorbent resin and a preparation method thereof. The preparation method comprises the following steps: carrying out polymerization crosslinking on acrylic acid and a cyclic polyene macromonomer in a saline solution, carrying out precipitating, filtering, washing, dispersing in an organic solvent, and carrying out surface crosslinking by using a compound surface crosslinking assistant solution to obtain the acrylic water-absorbent resin. The product simultaneously has the characteristics of high liquid absorption rate, high centrifugal water retention capacity, high 0.7 psi pressurization rate and low extractable matter content, and the prepared product is widely applied to sanitation, gardens, agriculture, industrial production and life.

Description

technical field [0001] The invention relates to the field of chemical polymer materials, more specifically, the invention relates to a high-performance acrylic water-absorbing resin and a preparation method thereof. Background technique [0002] Super Absorbent Polymer (SAP) has developed rapidly since its inception, from natural polymers, such as starch and cellulose, to synthetic polymers, such as acrylic water-absorbent resins. Superabsorbent resin can absorb hundreds of times its own weight in pure water, and can also lock water under certain external force, so it is widely used in all walks of life, such as diapers and sanitary napkins in the sanitary product industry , Industrially used for cable water blocking, oil field exploitation, as a preservative in the food industry, in the agriculture and forestry industry for desert control, landscaping and so on. At present, the annual consumption of superabsorbent resin in the world has exceeded 2 million tons, and it is s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/24C08L33/02C08F220/06C08F232/06
CPCC08J3/246C08F220/06C08J2333/02C08F232/06
Inventor 王刚马磊纪学顺孙家宽
Owner WANHUA CHEM GRP CO LTD