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Preparation method for resin with high absorptivity

A high-absorbency, resin technology, applied in the field of polymer materials, can solve the problems of poor absorption rate, large difference in performance indicators, poor pressure (load) absorption capacity, etc., to achieve high pressure performance and reduce the effect of content

Active Publication Date: 2014-07-16
宜兴丹森科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the present stage, the SAP performance indicators produced by major high-absorbent resin manufacturers are quite different, and their pressure (load) absorption capacity is poor under the condition of high absorption ratio; while some products have strong pressure absorption capacity. , but its absorption rate is relatively poor, and it is rare to be able to take care of both

Method used

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  • Preparation method for resin with high absorptivity
  • Preparation method for resin with high absorptivity
  • Preparation method for resin with high absorptivity

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) Add 300g of high-purity acrylic acid into a 2000ml four-necked flask equipped with a stirrer, reflux condenser, thermometer, and dropping funnel, then add 150g of deionized water through the dropping funnel, and then conduct a cold water bath on the flask, Under the condition that the internal temperature of the flask is controlled below 40° C., 380.1 g of aqueous sodium hydroxide solution with a concentration of 32 wt % is added dropwise through the dropping funnel to the flask for neutralization reaction;

[0034] (2) Continue to add the cross-linking agent polyethylene glycol diacrylate 600: 0.9g, polyethylene glycol 2000: 0.36g, pour the well-mixed neutralization solution into a 2000ml beaker, heat it to 58°C in an electric furnace, and Add 0.3 g of initiator sodium persulfate and 0.3 g of sodium sulfite while stirring, and start the reaction after 85 seconds, and the reaction is completed to obtain a hydrogel;

[0035] (3) Dry and pulverize the hydrogel obtaine...

Embodiment 2

[0040] (1) Add 300g of high-purity acrylic acid into a 2000ml four-necked flask equipped with a stirrer, reflux condenser, thermometer, and dropping funnel, then add 150g of deionized water through the dropping funnel, and then conduct a cold water bath on the flask, Under the condition that the internal temperature of the flask is controlled below 30° C., 380.1 g of aqueous sodium hydroxide solution with a concentration of 32 wt % is added dropwise through the dropping funnel to the flask for neutralization reaction;

[0041] (2) Continue to add the cross-linking agent polyethylene glycol diacrylate 600:0.9g, pour the uniformly mixed neutralization solution into a 2000ml beaker, heat it to 70°C in an electric furnace, and add the initiator sodium persulfate while stirring 0.3g, 0.3g sodium sulfite, the reaction starts after 60s, and the hydrogel is obtained after the reaction is completed;

[0042] (3) Dry and pulverize the hydrogel obtained in step (2). During the pulverizat...

Embodiment 3

[0047] (1) Add 300g of high-purity acrylic acid into a 2000ml four-necked flask equipped with a stirrer, reflux condenser, thermometer, and dropping funnel, then add 150g of deionized water through the dropping funnel, and then conduct a cold water bath on the flask, Under the condition that the internal temperature of the flask is controlled below 40° C., 380.1 g of aqueous sodium hydroxide solution with a concentration of 32 wt % is added dropwise through the dropping funnel to the flask for neutralization reaction;

[0048] (2) Continue to add the cross-linking agent polyethylene glycol diacrylate 600: 0.9g, N,N'-methylenebisacrylamide 0.36g, pour the well-mixed neutralizing solution into a 2000ml beaker, and heat it in an electric furnace At 40°C, add 0.3 g of initiator sodium persulfate and 0.3 g of sodium sulfite under stirring, and start the reaction after 5 minutes. After the reaction is completed, a hydrogel is obtained;

[0049] (3) Dry and pulverize the hydrogel obt...

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Abstract

A preparation method of a high-absorbent resin, after neutralizing acrylic acid or sodium acrylate with alkali, adding a pre-crosslinking agent and an initiator to carry out polymerization reaction; drying and pulverizing after obtaining a hydrogel, and obtaining pulverized gelatin during the pulverization process. At the same time as gel particles, dispersed micropowder will also be produced; the micropowder is subjected to secondary granulation, and fumed silica is added in the secondary granulation process, and then granulated together with pulverized gel particles; the resulting granulation The granules are mixed into the heat treatment solution composed of water and post-crosslinking agent for surface treatment, and this superabsorbent resin is obtained. The present invention comprehensively considers all links in the production process of the superabsorbent resin, optimizes the product from the neutralization stage, and finally obtains the superabsorbent resin with excellent indicators under less energy consumption and higher standards; the present invention The prepared high-absorbent resin is suitable for agriculture, forestry, gardening, desert control, and daily sanitary materials, especially for the industry of daily sanitary materials.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a method for manufacturing polyacrylic acid synthetic superabsorbent resin. Background technique [0002] Super absorbent polymer (SAP) is a general term for high molecular polymers with high water absorption and water retention properties. In the early 1950s, the Goodrich Company of the United States developed cross-linked polyacrylic acid, and then in 1961, Russell et al., the Northern Research Center of the US Department of Agriculture, first began to study grafting technology from starch and acrylonitrile. In 1978, Japan's Sanyo Chemical Co., Ltd. began to produce starch-polyacrylic acid graft copolymer superabsorbent resin. In the 1980s and 1990s, the demand for high-absorbent resins began to expand rapidly, with an average annual growth rate of 30% to 40%, and the research on varieties, synthesis routes, performance and application fields became more and more mat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J7/00C08J3/24C08L33/02C08K3/36C08F290/06C08F220/06
Inventor 杭渊徐亮裴小苏潘伟洪锡全
Owner 宜兴丹森科技有限公司
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