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Acrylic water-absorption resin, water-absorption resin with low soluble components and application of acrylic water-absorption resin

An acrylic and water-absorbing technology, which is applied in the field of water-absorbing resins, can solve the problems of over-drying of surface rubber particles, low temperature, and high energy consumption, and achieve the effect of reducing content

Active Publication Date: 2018-02-23
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this drying method, the temperature in the heating zone and the cooling zone is too low, and the drying efficiency is slow; and the temperature in the constant temperature zone is 190°C, and the surface colloidal particles may also be over-dried
This method has complex process and high energy consumption

Method used

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  • Acrylic water-absorption resin, water-absorption resin with low soluble components and application of acrylic water-absorption resin
  • Acrylic water-absorption resin, water-absorption resin with low soluble components and application of acrylic water-absorption resin
  • Acrylic water-absorption resin, water-absorption resin with low soluble components and application of acrylic water-absorption resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] a) Dissolve 1027g of sodium hydroxide solid in 4960g of water in the batching tank, then pour the aqueous sodium hydroxide solution into a jacketed reactor with a stirrer, add 2400g of acrylic acid, and control the temperature in the reactor to 80°C to obtain Neutralizing solution of acrylic acid, sodium acrylate and water;

[0064] b) Add 3.6g of polyethylene glycol diacrylate (average molecular weight 523) and 0.24g of hydroxyethyl acrylate to the neutralizing solution obtained in step a), and stir the neutralizing solution in the reactor into the polymerization tank , and at the same time, add 192g of prepared ammonium persulfate aqueous solution with a mass percentage concentration of 10wt% to the neutralizing solution at the outlet of the reaction kettle, and obtain an acrylic acid water-absorbent resin after 15 minutes of polymerization reaction;

[0065] c) cutting the acrylic water-absorbent resin obtained in step b) into 8 mm colloidal particles in sequence, dr...

Embodiment 2

[0068] a) Dissolve 1027g of sodium hydroxide solid in 4960g of water in the batching tank, then pour the aqueous sodium hydroxide solution into a jacketed reactor with a stirrer, add 2400g of acrylic acid, and control the temperature in the reactor to 80°C to obtain Neutralizing solution of acrylic acid, sodium acrylate and water;

[0069] b) Add 2.4g of polyethylene glycol diacrylate (average molecular weight 523) and 24g of hydroxybutyl acrylate to the neutralizing solution obtained in step a), and stir the neutralizing solution in the reactor into the polymerization tank, At the same time, 24g of prepared 10wt% ammonium persulfate aqueous solution was added to the neutralization liquid at the outlet of the reaction kettle, and the acrylic acid water-absorbent resin was obtained after polymerization;

[0070] c) cutting the acrylic water-absorbent resin obtained in step b) into colloidal particles of 12 mm in sequence, drying in an oven at 180° C. for 90 minutes, and then su...

Embodiment 3

[0073] a) Dissolve 640g of sodium hydroxide solid in 4960g of water in the batching tank, then pour the sodium hydroxide aqueous solution into a jacketed reactor with a stirrer, add 2400g of acrylic acid, and control the temperature in the reactor to 80°C;

[0074] b) Add 9.6g of polyethylene glycol diacrylate (average molecular weight 523) and 12g of glycerol triacrylate to the neutralizing solution obtained in step a), and stir the neutralizing solution in the reactor into the polymerization tank, At the same time, 96 g of a prepared tert-butyl hydroperoxide solution with a mass percentage concentration of 10 wt % was added to the neutralizing solution at the outlet of the reaction kettle to obtain an acrylic water-absorbing resin after polymerization;

[0075] c) cutting the acrylic water-absorbent resin obtained in step b) into colloidal particles of 10 mm in sequence, drying in an oven at 200° C. for 10 minutes, and then successively grinding and sieving to obtain acrylic ...

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Abstract

The invention discloses acrylic water-absorption resin, a preparation method of acrylic water-absorption resin with low soluble components and a preparation method of the acrylic water-absorption resin. The acrylic water-absorption resin is prepared from acrylic acid and a co-polymerized monomer in a copolymerization manner, wherein the co-polymerized monomer comprises a co-polymerized monomer (I)and / or a co-polymerized monomer (II); the preparation method comprises the following step: carrying out surface cross-linking treatment on the acrylic water-absorption resin or the acrylic water-absorption resin prepared by the method. The invention provides the water-absorption resin with the low soluble components as well as the preparation method and application thereof and provides acrylic water-absorption resin with relatively low soluble components.

Description

technical field [0001] The invention belongs to the technical field of preparation methods of water-absorbent resins, in particular to alkene-acid water-absorbent resins and water-absorbent resins with low soluble components and their applications. Background technique [0002] Polymer water-absorbent resin is widely used in baby diapers, women's sanitary napkins, and adult incontinence products because it can absorb and maintain (even under pressure) hundreds or even thousands of times its own mass of pure water or tens of times of normal saline. The field of hygienic materials such as hospital disposable mattresses, as well as the fields of soil water retention and food preservation have greatly facilitated people's daily life. [0003] The performance requirements of superabsorbent resin (SAP) used in diapers, women's sanitary napkins and other hygienic fields have gone through three stages, from the initial emphasis on the saturated liquid absorption of water-absorbent r...

Claims

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Application Information

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IPC IPC(8): C08F220/06C08F220/28C08F220/20C08J3/24C08L33/02
CPCC08F220/06C08F220/20C08F220/28C08J3/24C08J2333/02C08F220/286C08F222/103
Inventor 李春王刚黄岐善
Owner WANHUA CHEM GRP CO LTD