Process for preparing high water adsorbing resin

A technology of superabsorbent resin and aqueous solution, which is applied in the field of superabsorbent resin, can solve the problems that the cost of superabsorbent resin cannot be effectively reduced, and achieve the effects of good reversibility of water absorption and water release, cost reduction, and high gel strength

Inactive Publication Date: 2005-11-09
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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Problems solved by technology

[0003] Chinese patent 03120346 discloses an organic-inorganic composite water-retaining agent and its preparation method. The added inorganic material is attapulgite. However, since the polymerized monomer used is acryli

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0007] To prepare an aqueous solution of acrylamide, take 100 g of an aqueous solution of acrylamide with a concentration of 15% by weight in a beaker; then add an attapulgite with a weight of 15 g to fully disperse it in the solution, and then add 0.2 g of a crosslinking agent glycerol; Then add the oxidation-reduction initiator, the oxidizing agent is potassium persulfate, the addition amount is 0.05g; the reducing agent is sodium bisulfite, the addition amount is 0.2g; 2h; then granulate, dry, and pulverize to obtain the final product. The obtained superabsorbent resin has a water absorption multiple of 300 times and a salt absorption multiple of 65 times.

Embodiment 2

[0009] To prepare an aqueous solution of acrylamide, take 100g of an aqueous solution of acrylamide with a concentration of 5% by weight in a beaker; then add an attapulgite with a weight of 10g to make it fully dispersed in the solution, and then add 0.5g of crosslinking agent epichlorohydrin Add an oxidation-reduction initiator, the oxidant is sodium persulfate, and the amount added is 1g; the reducing agent is sodium sulfite, the amount added is 0.5g; then polymerize in a constant temperature water bath, the temperature of the water bath is 80 ° C, and the polymerization reaction is 5h; then Granulating, drying, crushing to get the final product. The obtained superabsorbent resin has a water absorption multiple of 800 times and a salt absorption multiple of 55 times.

Embodiment 3

[0011] To prepare an aqueous solution of acrylamide, take 100g of an aqueous solution of acrylamide with a concentration of 25% by weight in a beaker; then add an attapulgite with a weight of 12.5g to make it fully dispersed in the solution, and then add 0.1g of a crosslinking agent methylene Bisacrylamide; add an oxidation-reduction initiator, the oxidant is ammonium persulfate, and the amount added is 0.6g; the reducing agent is sodium metabisulfite, the amount added is 0.2g; then polymerize in a constant temperature water bath, the temperature of the water bath is 60 ° C, Polymerize for 4 hours; then granulate, dry, and pulverize to obtain the final product. The obtained superabsorbent resin has a water absorption multiple of 100 times and a salt absorption multiple of 70 times.

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Abstract

A high-hydroscopicity resin is prepared from acrylamide and attapulgite through costant-temp polymerization of aqueous solution. Its advantages are high hydroscopticity, gel strength, reversibility and stabiliy, and long service life.

Description

technical field [0001] The invention belongs to the technical field of superabsorbent resins, and in particular relates to a preparation method of superabsorbent resins. Background technique [0002] Super absorbent resin (SAP for short) is a new type of functional polymer material developed in recent years. Widely used in sanitary materials for women and children, water-swellable sealing materials, packaging materials, building materials, water-retaining and drought-resistant materials in agriculture and forestry, etc. As an agricultural superabsorbent resin, its use cost is the most critical factor. Therefore, how to reduce the production cost of superabsorbent resin as much as possible, develop low-cost superabsorbent resin, and finally achieve the purpose of increasing income and production is the top priority of agricultural water conservation technology. [0003] Chinese patent 03120346 discloses an organic-inorganic composite water-retaining agent and its preparatio...

Claims

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Application Information

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IPC IPC(8): C08F120/56
Inventor 李志强谭颖郭永利张志成潘振远
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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