Preparation method of super absorbent resin under high salt concentration

A technology of superabsorbent resin and high salt concentration, applied in absorbent pads, medical science, bandages, etc., can solve the problems of no patent report on the absorption characteristics of superabsorbent resin, strong carcinogenicity of acrylamide, and large safety risks

Active Publication Date: 2021-03-12
浙江卫星新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The disadvantage is that acrylamide has strong carcinogenicity and there is a greater safety risk
[0007] To sum up, in the prior art, there is no patent report on the absorption characteristics of superabsorbent resin under high salt water concentration

Method used

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  • Preparation method of super absorbent resin under high salt concentration
  • Preparation method of super absorbent resin under high salt concentration

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Effect test

Embodiment 1

[0059] A preparation method of superabsorbent resin under high salt concentration, comprising the following preparation steps:

[0060] a) Add 42.78 parts of deionized water to 100.00 parts of high-purity acrylic acid, slowly add 135.31 parts of 32wt% NaOH aqueous solution, and control the neutralization temperature at 30-40°C to obtain a monomer concentration of 44.5% and a neutralization degree of 78%. monomer solution.

[0061] b) Then add 3.000 parts of 35% acidic silicon dioxide solution, 0.515 parts of polyethylene glycol (400) diacrylate, 0.835 parts of polyethylene glycol (1000) diacrylate, and polyoxyethylene sorbate to the monomer solution. Anhydrous sugar-alcohol monostearate 150ppm, fully stir and mix evenly.

[0062] c) Heating the reaction solution to 80° C., then adding 2.880 parts of 5% sodium persulfate solution, and simultaneously feeding 1 L / min of high-purity nitrogen into the reaction solution until the reaction solution thickens.

[0063] d) The gel obt...

Embodiment 2

[0065] A preparation method of superabsorbent resin under high salt concentration, comprising the following preparation steps:

[0066] a) Add 37.58 parts of deionized water to 100.00 parts of high-purity acrylic acid, slowly add 138.77 parts of 32wt% NaOH aqueous solution, and control the neutralization temperature at 30-40°C to obtain a monomer concentration of 45% and a neutralization degree of 80%. monomer solution.

[0067] b) Then add 3.000 parts of 35% acidic silicon dioxide solution, 0.554 parts of polyethylene glycol (400) diacrylate, 0.646 parts of polyethylene glycol (600) diacrylate, polyoxyethylene sorbate to the monomer solution Anhydrous sugar-alcohol monostearate 150ppm, fully stir and mix evenly.

[0068] c) Heating the reaction solution to 78°C, then adding 3.244 parts of 5% sodium persulfate solution, 16% Na 2 CO 3 1.800 parts of solution;

[0069] d) The gel obtained after the reaction is granulated, dried, ground, sieved, and surface treated sequential...

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Abstract

The invention discloses a preparation method of super absorbent resin under high salt concentration. The method comprises the following steps: a) preparing a monomer solution with neutralization degree of 70-80mol% by using acrylic acid, alkali and deionized water as raw materials; b) adding 3wt%-45wt% of an acidic nanoscale silicon dioxide solution and a composite internal crosslinking agent intothe monomer solution obtained in the step a), and fully stirring and uniformly mixing to obtain a reaction solution; c) heating the reaction solution in the step b), adding a foaming medium, and thenadding a thermal initiator for polymerization to obtain gel; and d) sequentially carrying out drying, crushing and surface treatment on the gel obtained in the step c) to obtain the high-absorbability resin with excellent performance under high salt water concentration. The super absorbent resin with high salt concentration has excellent performance under high salt concentration, improves the liquid absorption and liquid retention capacity of adult incontinence diapers and patient nursing mattresses, and can effectively ensure the dryness of nursing products.

Description

technical field [0001] The invention relates to the technical field of superabsorbent resin, in particular to a preparation method of superabsorbent resin under high salt concentration. Background technique [0002] According to data released by the National Bureau of Statistics, as of the end of 2019, China's elderly population aged 65 and above reached 176 million, accounting for 12.6% of the total population. Moreover, the trend of population aging is intensifying. It is estimated that by 2025, the elderly population will exceed 200 million, and by 2050, the elderly population will be close to 400 million. In addition, the proportion of elderly people aged 60 to 64 who cannot take care of themselves accounted for 0.9%, while those aged 90 and above accounted for as high as 20%. The health problems and nursing problems accompanying the aging problem are not only the people's livelihood problems that the national government departments need to solve urgently, but also the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/06C08F222/20C08F2/44C08K3/36A61L15/24A61L15/60
CPCC08F220/06C08F2/44C08K3/36A61L15/24A61L15/60C08L33/02C08F222/1063
Inventor 杨卫东朱雅亮卢卫伟吕志平阮玉林刘健邵东
Owner 浙江卫星新材料科技有限公司
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