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Super electrolyte resistant high water absorption resin and its preparation method

A technology of electrolyte-resistant and water-absorbent resin, applied in the field of superabsorbent resin and its preparation, can solve the problems of low index and no water absorption of sodium chloride aqueous solution, and achieve strong anti-mold decomposition ability, excellent electrolyte resistance and Biodegradable properties, the effect of less soluble components

Inactive Publication Date: 2008-09-03
JIANGSU QIANGLIN BIO ENERGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the patent claims that the water-absorbent resin has strong water absorption capacity for ion-containing water, it only provides the water absorption capacity for distilled water and tap water, and does not give the water absorption capacity for 0.9% sodium chloride aqueous solution, and the index is not high. In the example, the water absorption to distilled water is 340-380 g water / g resin, and the water absorption to tap water is 155-190 g water / g resin

Method used

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  • Super electrolyte resistant high water absorption resin and its preparation method

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Embodiment 1

[0025] A super-strong electrolyte-resistant water-absorbing resin, the water absorption of the resin to distilled water is greater than 600 grams of water / gram of resin, the water absorption of tap water is greater than 250 grams of water / gram of resin, and the water absorption of 0.9% sodium chloride tap water solution is greater than 100 grams of water / grams of resin.

Embodiment 2

[0027] A method for preparing a super-strong electrolyte-resistant water-absorbing resin, comprising the following steps:

[0028] The first step is to mix water-soluble cellulose, acrylamide and cationic vinyl polymerized monomer in water, and the percentage of water-soluble cellulose to the total mass of water-soluble cellulose, acrylamide and cationic vinyl polymerized monomer is 5-30%, for example: 6%, 8%, 12%, 15%, 19%, 21%, 24%, 27.5%, acrylamide accounts for water-soluble cellulose, acrylamide and cationic vinyl polymer The percentage of the total mass of the three bodies is 20-65%, such as: 22%, 27%, 32%, 35%, 37%, 42%, 48%, 53%, 57%, 62%, cationic ethylene The percentage of polymerizable monomers in the total mass of water-soluble cellulose, acrylamide and cationic vinyl polymerizable monomers is 10-50%, for example, it can be 12%, 18%, 22%, 25%, 26%, 28%, 35%, 42%, 44%, 48%, after mixing, a mixed reaction system is formed, and substances other than water in the mixe...

Embodiment 3

[0033] Weigh 10 grams of carboxymethyl cellulose, 45 grams of acrylamide, 55 grams of methacryloyloxyethyltrimethylammonium chloride and 0.4 grams of N, N'-methylene bisacrylamide, add 180 ml of distilled water, fully Stir to dissolve, adjust the pH to 4 with 3% dilute hydrochloric acid solution, and then add 1.37 grams of ammonium persulfate and 0.63 grams of sodium bisulfite. Under the protection of nitrogen, react at 60°C for 45 minutes, cool the product, dry and pulverize to obtain a powdery water-absorbent resin.

[0034] The product (water-absorbing resin 1) in the present embodiment is a white powder, measured by tea bag weighing method, every gram of resin absorbs 602 grams of distilled water, 257 grams of tap water, and 112 grams of water absorption to 0.9% sodium chloride aqueous solution.

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Abstract

The present invention is super electrolyte resistant high water absorption resin, which has a water absorption amount on distilled water higher than 600 g / g resin, on tap water higher than 250 g / g resin and on 0.9 % concentration water solution of NaCl higher than 100 g / g resin. The preparation process includes mixing water soluble cellulose, acrylamide and cationic ethylene polymer monomer into water to form mixed reaction system; regulating pH value of the reaction system, adding free radical polymerization reaction initiator and non-ionic cross-linking agent to produce grafting copolymerization; dewatering, drying and crushing to obtain the super electrolyte resistant high water absorption resin. The present invention has the advantages of low cost, environment friendship, high electrolyte resistance, high water absorbing capacity, high gel strength, low soluble component content and high enzymolysis resistance.

Description

technical field [0001] The invention relates to a superabsorbent resin and a preparation method thereof, in particular to a super-electrolyte-resistant superabsorbent resin and a preparation method thereof. Background technique [0002] Superabsorbent resin, also known as super absorbent polymer (SAP for short), is a new type of material that has developed rapidly in the field of polymers in recent years. It is a functional polymer material containing strong hydrophilic groups and moderately cross-linked. It can absorb water hundreds or even thousands of times its own mass in a short period of time, and has good water retention properties. Since the first successful development in the United States in the 1960s, and the successful application and promotion of corn and soybean seed coating experiments in the 1970s, countries all over the world have competed to develop a variety of super absorbent resins (such as US patents 3980663, 4093776, 4954562, 4880858 And European Pate...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F251/02C08K5/06
Inventor 商士斌宋湛谦王丹高宏
Owner JIANGSU QIANGLIN BIO ENERGY
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