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Low-cost nutrition type water keeping agent and preparation method thereof

A water-retaining agent and nutrient-based technology, applied in the field of low-cost nutrient-type water-retaining agent and its preparation, to achieve the effects of wide application, high gel strength, and long service life

Inactive Publication Date: 2008-06-25
SUZHOU GUODUN INVESTMENT MANAGEMENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the cost is reduced, it still only has the function of water absorption and release

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0007] Get 100g of mass percent 35% sodium acrylate and put it in a beaker, then add 3.5g of urea, add 0.007g of crosslinking agent glycerin, add redox initiator, 0.35g of oxidizing agent ammonium persulfate, and 0.35g of reducing agent sulfurous acid ; Then carry out polymerization, the temperature is 80 ℃, and the polymerization reaction is 2 hours; finally, the final product is obtained after granulation, drying, and crushing.

Embodiment 2

[0009] Take 100g of 10% sodium acrylate in a beaker, then add 20g of urea, add 0.002g of crosslinking agent N, N'-methylene bisacrylamide, and then add redox initiator, oxidant potassium persulfate 0.05g , reducing agent sodium sulfite 0.05g; then carry out polymerization, the temperature is 50°C, and the polymerization reaction is 6h; finally, the final product is obtained after granulation, drying and crushing, and the water absorption rate of the obtained superabsorbent resin is 2000 times, and the absorption rate of salt water is 100 times .

Embodiment 3

[0011] Take 100g of 35% sodium acrylate in a beaker, then add 30g of urea, add 0.5g of cross-linking agent N, N'-methylenebisacrylamide, and then add redox initiator, oxidant ammonium persulfate 0.35g , the reducing agent potassium metabisulfite (sodium) 0.35g; then carry out polymerization, the temperature is 60 ℃, and the polymerization reaction is 6h; Finally, the final product is obtained after granulation, drying and crushing, and the water absorption rate of the obtained superabsorbent resin is 100 times, The saline absorption rate is 30 times.

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Abstract

The invention belongs to the technical field of the supper absorbent resin and discloses a preparation method for low-cost nutrition type water retaining agent. The invention adopts the acrylic acid as a monomer, adopts the aqueous solution polymerization method and adds a large amount of urea as the nutritional agent, thus the cost is not only lowered but the water retaining agent simultaneously has the nutritional function as well. The water retaining agent which is characterized by a low cost and a nutritional function has excellent water absorption and retention performances, higher gel strength and better biochemical stability, can be widely applied to the agriculture and forestry and is convenient for the industrialized production.

Description

technical field [0001] The invention belongs to the field of superabsorbent resins, and relates to a low-cost nutritional water retention agent and a preparation method thereof. Background technique [0002] At present, there are many studies on water-retaining agents in agriculture and forestry. However, due to the high price and single performance of commercial water-retaining agents, it is a key problem that hinders the large-scale application of water-retaining agents in arid areas. Domestic scholars have done a lot of work in reducing costs, but most of the research has focused on compounding inorganic minerals. [0003] Chinese patent CN1693320A discloses an organic-inorganic composite low-cost water-retaining agent and a preparation method thereof. The water-retaining agent is prepared by using a composite attapulgite. Although the cost is reduced, it still only has the function of absorbing and releasing water. Therefore, under the premise of reducing the cost, imp...

Claims

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Application Information

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IPC IPC(8): C08F220/06C08F4/40C08F220/56
Inventor 孔金祥
Owner SUZHOU GUODUN INVESTMENT MANAGEMENT
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