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A kind of preparation method of superabsorbent polymer

A high water absorption and polymer technology, applied in the field of new functional polymer materials, can solve problems such as time-consuming and labor-intensive reduction of space-time yield, and achieve the effects of improving water absorption capacity, saving manpower, and continuous production

Active Publication Date: 2017-07-25
欧阳晨曦
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The method of discontinuously polymerizing the monomer aqueous solution with a double-arm kneader is to use the shear force of the rotation of the kneader's stirring shaft to crush the product into the required particle size, which is not only time-consuming and labor-intensive, but also reduces the space-time yield. Rate

Method used

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  • A kind of preparation method of superabsorbent polymer
  • A kind of preparation method of superabsorbent polymer

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Embodiment 1

[0030] A kind of preparation method of superabsorbent polymer, used acrylic acid is the partially neutralized acrylic acid that 80% is neutralized by sodium hydroxide, prepares 100 parts of aqueous slurry with this partially neutralized acrylic acid, and its acrylic acid monomer concentration is 59.4%, Add 0.006 parts of N,N'methylene bis-dienamide, 0.2 parts of potassium persulfate and 1.6 parts of sorbitan glycerol-laurate to the above-mentioned 100 parts of acrylic acid monomer aqueous solution to prepare an aqueous slurry, Blow in nitrogen for deoxidation treatment, then gently stir and nitrogen "bubble", and send it into the agitator at a supply speed of 250g / min, and at the same time send 3% sodium bisulfite aqueous solution into the stirrer at a supply speed of 6g / min In the device (respectively using quantitative pumps) to make a slurry-like water-based mixture, the slurry-like water-based mixture is continuously sent to the screw extruder, the temperature of the casing...

Embodiment 2

[0034] A kind of preparation method of superabsorbent polymer, the acrylic acid used is 80%, the acrylic acid neutralized by sodium hydroxide, and 100 parts (weight) of water-based slurry are prepared with this part of neutralized acrylic acid, wherein the monomer concentration is 59.4% ( Heavy). Then, to the above 100 parts (weight) of aqueous slurry, add 0.03 parts (weight) of ethylene glycol diglycidic acid fan and 0.2 parts (weight) of potassium persulfate and 1.6 parts (weight) of sorbitan glycerol monolaurel Sour fat, after being prepared into a water-based mixture, is blown into nitrogen to carry out deoxidation treatment, and then gently stirred "bubbling", and it is continuously sent into the screw extrusion device at a supply speed of 250g / min. At the same time, 3% (weight) sodium bisulfite aqueous solution is sent into the agitator at a speed of 6g / min (respectively using quantitative pumps) to make a slurry-like water-based mixture and the slurry-like water-based m...

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Abstract

The invention discloses a preparation method of a high-water-absorption polymer. The polymer comprises the following components (in parts by weight): 40g to 45g of acrylic acid, 55g to 60g of water, 19.28g to 20.5g of sodium hydroxide, 0.01g to 0.02g of N, N' methylene bis-alkenyl amide, 1g to 2g of 3% potassium persulfate aqueous solution, 0.05g to 0.1g of sorbide glycerinum-laurate and 1g to 2g of 3% potassium persulfate aqueous solution. The preparation method comprises the following steps: preparing the acrylic acid aqueous solution with concentration of 55 to 60 percent; adding a cross-linking agent, a surface active agent and a polymerization initiator into the acrylic acid aqueous solution, blowing nitrogen, sending the solution into a blender at a feed speed of 250g / min, sending the 3% sodium bisulfate aqueous solution into the blender at a feed speed of 6 to 10 g / min, enabling the material mixed by the blender to rapidly flow into a screw squeezing device to be polymerized, controlling the temperature at 103 DEG C, discharging the hydrogel polymer out of the squeezing device, drying by virtue of hot air at 160 DEG C, and crushing to obtain the high-water-absorption polymer. The preparation method is stable in product quality, high in yield, labor-saving and high in efficiency.

Description

technical field [0001] The invention relates to the technical field of novel functional polymer materials, in particular to a preparation method of a superabsorbent polymer. Background technique [0002] As we all know, the current production technology of similar water-absorbent resin products is relatively backward. Generally, plastic tray device polymerization method, ring belt polymerization method and double-arm kneader polymerization method are used. There are many unfavorable factors in the above methods. [0003] In the existing plastic tray device polymerization method, the product polymerization is uneven, the plastic tray is stuck, the production equipment is stuck, etc., and the material leakage causes environmental pollution, the polymerization space is large, and a large amount of manpower is required. [0004] In addition, in the method of polymerization on the endless belt, the original degree of the monomer aqueous solution is limited, and the yield of the p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/06C08F222/38C08F4/40
Inventor 陈明贵许新民
Owner 欧阳晨曦
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