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Method for producing high water absorption resin

A manufacturing method and water-absorbing technology, which is applied in the field of manufacturing water-absorbing resins, can solve problems such as reducing production efficiency, achieve the effects of improving product quality, stabilizing the polymerization reaction process, and improving the operating environment

Active Publication Date: 2012-09-26
FORMOSA PLASTICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to overcome this shortcoming, a reaction vessel with a rotating arm is used to carry out heat removal polymerization in a static state (Mainland Patent No. 1,171,411A), but the reaction temperature and the rotational speed of the rotating arm must be controlled within a certain range. Productivity

Method used

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  • Method for producing high water absorption resin
  • Method for producing high water absorption resin
  • Method for producing high water absorption resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] 1) Add 1984g of acrylic acid and 2685.3g of water into a 6000c.c nitrogen-substituted container; in addition, weigh 1528.6g of 49% sodium hydroxide aqueous solution, and slowly add the sodium hydroxide aqueous solution into the acrylic acid aqueous solution under ice-cooling Neutralization is carried out; at this time, an aqueous solution with an acid group-containing monomer concentration of 38.6 wt% is obtained, in which 68 mol% of acrylic acid is neutralized into sodium acrylate.

[0059] 2) Add the above-mentioned neutralized acid group-containing monomer aqueous solution and 0.1 g of potassium persulfate: sodium sulfite = 1: 1 (weight ratio) into a horizontal cylindrical prepolymerization reactor equipped with a jacket for mixing and prepolymerization reactions. The reaction temperature was 20° C., the reaction time was 60 minutes, and the viscosity of the obtained prepolymer was 100 cps.

[0060] 3) Add the viscous prepolymer and 9.98g N, N'-bis(2-propenyl)amine ...

Embodiment 2

[0065] Repeat Example 1, but N, N'-bis(2-propenyl)amine is reduced to 0.2 parts by weight for monomer addition. The rest is the same as in Example 1 to obtain a superabsorbent resin, the measured retention force is 29.87g / g, and the residual monomer is 42.6ppm.

Embodiment 3

[0067] Example 1 was repeated, but the degree of neutralization was increased to 75 mol%. The rest is the same as in Example 1 to obtain a superabsorbent resin, the measured retention force is 30.24g / g, and the residual monomer is 53.9ppm.

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Abstract

The invention provides a manufacturing method for water-absorbent resin. The water-absorbent resin manufactured according to the simple manufacturing method has high whiteness, simultaneously can slacken the occurrence of aetiolation, and the physical property behaves good characteristic.

Description

technical field [0001] Superabsorbent resins are widely used as water retention agents in agriculture or gardening, anti-dew condensation agents in building materials and materials for removing moisture from petroleum, or outer waterproof coating agents in cables and sanitary products Such as diapers, feminine hygiene products, disposable wipes, etc. [0002] In the above cases, since the superabsorbent resin comes into direct contact with the human body, the safety of the superabsorbent resin becomes very important. Generally speaking, the physical properties required by superabsorbent resins include absorption rate, absorption force, absorption rate under pressure, and gel force after absorption. An excellent superabsorbent resin must not only meet the above physical properties, but more importantly, must have good safety. Background technique [0003] The component materials of superabsorbent resins known in the art include hydrolyzed starch-acrylonitrile (hydrolyzed st...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F20/06C08F20/56C08F2/01C08F2/48C08J3/24
Inventor 施凯耀吴政璋钟宏宗谢益民周源城陈忠毅
Owner FORMOSA PLASTICS CORP
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