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Preparation method of porous sodium acrylate super absorbent resin

A super absorbent resin, sodium acrylate technology, used in absorbent pads, medical science, bandages, etc., to solve the problem of slow liquid absorption, less three wastes, and mild reaction.

Active Publication Date: 2011-10-26
浙江卫星新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems existing in existing resins, the present invention provides a preparation method of porous sodium acrylate superabsorbent resin

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] a) Add 500g of high-purity acrylic acid and 180g of deionized water into a 2L kneader (Hangzhou Fuxiangtai Machinery Manufacturing Co., Ltd.), and then slowly add 650g of 32% ionic membrane caustic soda (Jiaxing Chemical Factory) to the above-mentioned acrylic acid solution .

[0022] b) 10 g of alcohol, 2 g of sodium lauryl sulfate, 2 g of azodicarbonamide and 1 g of N, N'-methylenebisacrylamide were added to the above solution, followed by nitrogen gas for 30 minutes. At this time, the temperature of the aqueous monomer solution is 40°C

[0023] c) Add polymerization initiators, 15 g each of 10 wt % ammonium persulfate and 10 wt % sodium bisulfite.

[0024] d) After reacting for 1 hour, the polymerized hydrogel was taken out.

[0025] e) Cut it into small particles with scissors, then put it into a meat grinder, and add 20 grams of alcohol. Made into particles of about 6mm.

[0026] f) The above granules are baked in an oven at 130°C for 2 hours to obtain dry gran...

Embodiment 2

[0031] a) Add 500 g of high-purity acrylic acid and 180 g of deionized water into the kneader, and then slowly add 660 g of 32% ionic membrane caustic soda into the above acrylic acid solution.

[0032] b) 5 g of alcohol, 1 gram of sodium lauryl sulfate, 1 gram of azodicarbonamide and 1 g of N, N'-methylenebisacrylamide were added to the above solution, and then nitrogen gas was passed for 30 minutes. At this time, the temperature of the aqueous monomer solution is 40°C

[0033] c) Add polymerization initiators, 15 g each of 10 wt % ammonium persulfate and 10 wt % sodium bisulfite.

[0034] d) After reacting for 1 hour, the polymerized hydrogel was taken out.

[0035] e) Use scissors to cut into small particles, and then put them into a meat grinder with 10g of alcohol. Made into particles of about 6mm.

[0036] f) The above granules are baked in an oven at 130°C for 2 hours to obtain dry granules with a water content of 5-7 wt%.

[0037] g) After the above particles are p...

Embodiment 3

[0041] a) Add 500 g of high-purity acrylic acid and 180 g of deionized water into the kneader, and then slowly add 650 g of 32% ionic membrane caustic soda into the above-mentioned acrylic acid solution.

[0042] b) 1 g of ethylene glycol dimethacrylate was added to the above solution, and then nitrogen gas was passed for 30 minutes. At this time, the temperature of the aqueous monomer solution was 70°C.

[0043] c) Add 15 g of 10 wt % ammonium persulfate which is a polymerization initiator.

[0044] d) After reacting for 1 hour, the polymerized hydrogel was taken out.

[0045] e) Cut into small particles with scissors, and then put them into a meat grinder. Made into particles of about 6mm.

[0046] f) The above granules are baked in an oven at 130°C for 2 hours to obtain dry granules with a water content of 5-7 wt%.

[0047] g) After the above particles are pulverized by a universal pulverizer, the resin of 20-100 mesh is sieved by standard sieving. More than 20 purpose...

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Abstract

The invention relates to a preparation method of a porous sodium acrylate super absorbent resin. The preparation method comprises the following steps: an aqueous solution containing 30 to 45 wt% of acrylic acid monomers with a neutralization rate of 60 to 90 mole%, a cross linking agent, a porogenic agent, and a polymerization initiator are polymerized together under nitrogen protection; and porous particles are prepared through preparing granulums with diameters of 2 to 10 mm from hydrogel prepared through polymerization, and adding the surface cross linking agent and an inorganic filler to carry out surface processing. The preparation method of the invention allows continuous production to be realized, productivity to be improved, manpower to be decreased, a problem of slow imbibition to be solved, drying period to be substantially decreased, product performances to be substantially improved, the qualified rate of products to be high, reaction to be mild, and three wastes to be less.

Description

technical field [0001] The invention relates to a preparation method of a polymer, in particular to a preparation method of a porous sodium acrylate superabsorbent resin. Background technique [0002] The superabsorbent resin has a good liquid absorption capacity, can absorb a hundred times its own weight of water, and does not have a good water retention effect after absorbing water, and it will not leak a lot when water is pressurized. Widely used agricultural soil water retaining agents, sanitary products, cable water blocking and fire extinguishing agents. With the improvement of people's living standards, the demand for super absorbent resins is increasing. At present, the superabsorbent resin produced in China has a slow liquid absorption speed, while the porous superabsorbent resin can increase the liquid absorption speed, and the performance is close to that of the superabsorbent resin produced by the reversed phase suspension method, and the water retention ratio i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/06C08J9/00C08J9/36A61L15/24
Inventor 马国林王成金丰富
Owner 浙江卫星新材料科技有限公司
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