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Preparation method of high-performance water absorption resin

A technology of water absorption and resin, which is applied in the field of superabsorbent resin manufacturing, can solve the problems of increased fine powder, increased temperature and pressure of the reaction system, and excessive stacking, so as to increase production efficiency, maintain uniform distribution, and improve production efficiency. Effect

Active Publication Date: 2013-10-09
FORMOSA PLASTICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In these methods, organic solvents must be used for reverse-phase suspension polymerization and emulsification polymerization, but if the temperature during polymerization cannot be effectively controlled, the organic solvent will cause the temperature and pressure of the reaction system to increase, causing fire or even It will cause an explosion, which will threaten the safety of personnel at the operation site and cause environmental pollution problems, or there may be doubts about organic solvent residues in its finished products
[0005] In the preparation process of superabsorbent resin, in order to make the resin fully achieve the stability of output control, it is usually used to control the opening of the valve or the reaction speed in the reaction vessel, extrusion granulation vessel or drying vessel. Shredder, slicer, extrusion porous machine, spiral slicer, grinder, and then dry in a rougher; but adjusting the reaction vessel will affect the polymerization of the hydrogel, such as reaction heat control, catalyst addition There are factors that are unfavorable to changes in production, such as changes in the quantity; or adjust the speed of the rougher to increase production capacity, because the hydrogel stack is too thick, resulting in poor drying efficiency or high drying temperature, which will increase the fine powder and unfavorable sales factors.

Method used

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  • Preparation method of high-performance water absorption resin

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Experimental program
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Effect test

Embodiment 1

[0034] 1) Take 2624.4g of 48% sodium hydroxide aqueous solution and slowly add 3240.0g of acrylic acid and 3499.2g of water into a 12L conical flask. The dropping ratio of sodium hydroxide / acrylic acid is in the range of 0.85 to 0.95, and the dropping time is 6 hours. And keep the temperature of the neutralization reaction system in the bottle within the range of 20°C to 40°C; at this time, the concentration of the monomer aqueous solution is 42wt%, wherein 70mol% (molar ratio) of acrylic acid is partially neutralized to sodium acrylate.

[0035] 2) Add 4.98g of N,N'-methylenebisacrylamide to the above acrylic acid solution, and keep the temperature at about 20°C.

[0036] 3) Add 4.71g of hydrogen peroxide, 21.60g of sodium bisulfite and 21.60g of ammonium persulfate to start the reaction to form a water-absorbent resin hydrogel.

[0037] 4) Cut the reacted hydrogel with a cutting strip cutter (produced by Taiwan Merlide Company, model: MRT-SCN-2S), and screen out the hydrogel...

Embodiment 2

[0042] Repeat embodiment one, but change blade into round bar (long 10cm, diameter 1cm, blade number is 20, plow leveler blade bearing total length is 20 centimeters, and rotating speed is 30r.p.m), all the other are the same as embodiment one; its grinder The current was 4.78 amps and the fines ratio was 7.67%.

Embodiment 3

[0044] Repeat embodiment one, but change middle three blades into round rods (long 10cm, diameter 1cm, blade number is 12, plow leveler blade bearing total length is 20 centimeters, rotating speed is 30r.p.m), all the other are with embodiment one; It had a grinder current of 4.45 amps and a fines ratio of 7.87%.

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Abstract

The invention relates to a preparation method of high-performance water absorption resins, which comprises the step of utilizing the stable distribution for controlling the output of water gel so as to improve the production efficiency. The preparation method not only can guarantee stable output, but also can increase the production efficiency of high water absorption resins.

Description

technical field [0001] The present invention provides a method for producing a superabsorbent resin by increasing the hydrogel dispersibility of the water-absorbent resin to improve production efficiency. The water-absorbent resin with stable quality can be obtained through this manufacturing method, so that the production process of the water-absorbent resin can maintain a more stable output, maintain uniform distribution, and increase the production efficiency of the super-absorbent resin. Background technique [0002] 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. [0003] The known component materials of superabsorbent resins include hydrolyzed starch-acrylonitrile (hydrolyzed starchacrylonit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L101/06B29B9/02B29B7/00C08F220/06C08F220/54
Inventor 施凯耀吴政璋陈忠毅许正辉江政富邱伯寿钟宏宗周源城游志贤庄玉筵吴俊贤刘致铭林昌亿黄莉涵刘全福
Owner FORMOSA PLASTICS CORP