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Synthetic method of salt tolerant quadripolymer superabsorbent resin

A super absorbent resin, quaternary copolymerization technology, applied in the field of functional polymer materials, can solve the problems of easy occurrence of danger, low ignition point, high price, and achieve the effects of low equipment requirements, improved salt resistance, and high strength

Inactive Publication Date: 2012-02-15
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the current relevant patent documents use cyclohexane and n-hexane as dispersants. The disadvantages are that the price is high, and the low ignition point of cyclohexane and n-hexane is prone to danger.

Method used

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  • Synthetic method of salt tolerant quadripolymer superabsorbent resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] In a 250ml three-necked flask equipped with a stirrer, a condenser, and a thermometer, add 105ml of cyclohexane, 2.5g of Span-80, stir and heat up to 66°C, and dropwise add N,N-methylenebis Acrylamide 0.01g, potassium persulfate (KPS) 0.08g, acrylic acid (AA) (neutralized with 40% NaOH 2.7789g) 7.1458g, acrylamide (AM) 2.0417g, 2-acrylamide-2-methanol A mixed solution of 3.758 g of methylpropanesulfonic acid (AMPS) and 1.8 g of dimethyl diallyl ammonium chloride (DMDAAC). After the dropwise addition, keep the temperature constant for 1 hour, raise the temperature to 72°C and react for 2 hours, then cool to room temperature, pour the product into a beaker filled with sufficient amount of methanol, after sufficient precipitation, filter through a vacuum pump, and then wash repeatedly with methanol , dried in a vacuum oven at 80°C to obtain a white powder, which is the quaternary copolymerized superabsorbent resin.

[0022] Particle size analysis shows that the particle s...

Embodiment 2

[0027]In a 250ml three-necked flask equipped with a stirrer, a condenser, and a thermometer, add 105ml of cyclohexane and 2.5g of Span-80, stir to raise the temperature to 66°C, and dropwise add 0.015g of N-methylolacrylamide through a constant pressure titration funnel , ammonium persulfate 0.08g, acrylic acid (neutralized with 40% NaOH 2.858g) 7.35g, acrylamide 1.8375g, 2-acrylamide-2-methylpropanesulfonic acid (AMPS) 3.758g, acryloxy A mixed solution of 1.5 g of ethyltrimethylammonium chloride (DAC). After the dropwise addition, keep the temperature constant for 1 hour, raise the temperature to 72°C and react for 1-2 hours, then cool to room temperature, pour the product into a beaker filled with sufficient amount of methanol, after sufficient precipitation, filter it with a vacuum pump and wash it repeatedly with methanol Repeatedly, dry in a vacuum box at 80°C to obtain a white powder, which is the quaternary copolymerized superabsorbent resin.

[0028] Particle size ana...

Embodiment 3

[0033] In a 250ml three-neck flask equipped with a stirrer, a condenser, and a thermometer, add 110ml of cyclohexane and 2.8g of Span-80, stir to raise the temperature to 66°C, and add N,N-dimethylacrylamide dropwise through a constant pressure titration funnel 0.012g, azobisisobutyronitrile (AIBN) 0.085g, acrylic acid (neutralized with 40% NaOH 2.977g) 7.6562g, acrylamide 1.5313g, 2-acrylamide-2-methylpropanesulfonic acid ( AMPS) 3.758g, a mixed solution of 1.4g of methacryloyloxyethyltrimethylammonium chloride. After the dropwise addition, keep the temperature constant for 1 hour, raise the temperature to 72°C and react for 1-2 hours, then cool to room temperature, pour the product into a beaker filled with sufficient amount of methanol, after sufficient precipitation, filter it with a vacuum pump and wash it repeatedly with methanol Repeatedly, dry in a vacuum box at 80°C to obtain a white powder, which is the quaternary copolymerized superabsorbent resin.

[0034] Particl...

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Abstract

The invention relates to a synthetic method of a salt tolerant quadripolymer superabsorbent resin, comprising the following steps of: adding cyclohexane and a dispersant Span-80 into a 3-mouth flask, stirring and heating up to the temperature of 60-68 DEG C, dropwisely adding a hydrophilic cross-linking agent, an initiator and a comonomer by a constant-voltage titration tunnel, staying at constant temperature for 1 hour after the addition, heating up to the temperature of 70-75 DEG C and reacting for 2-3 hours, cooling to room temperature, pouring the obtained product into a beaker with enough methanol, fully depositing, followed by pumping filtration by a vacuum pump, repeatedly washing by the use of methanol, and drying in a vacuum chamber at the temperature of 80-90 DEG C to obtain a white powder, namely the salt tolerant quadripolymer superabsorbent resin. The invention has the following beneficial effects: the technology is simple; the requirement on equipment is low; the resin prepared by the synthetic method has strong water absorption, fast water absorption rate, excellent water retention, high strength in the superabsorbent state, good light and thermal stability as well as salt tolerance which is remarkably improved.

Description

technical field [0001] The invention belongs to the field of functional polymer materials, and specifically relates to a method for synthesizing a salt-tolerant quaternary copolymerized superabsorbent resin, in particular, the salt resistance has been comprehensively improved, and the water absorption rate of the resin can be adjusted by adjusting the ratio of monomers . Background technique [0002] Super absorbent resin (SAP) is a new type of functional polymer material. It has a high water absorption function of absorbing water hundreds to thousands of times heavier than itself, and has excellent water retention performance. Once it absorbs water and swells into a hydrogel, it is difficult to separate the water even if it is pressurized. Superabsorbent resin is a functional polymer material with a large number of hydrophilic groups. With its high water absorption capacity, high water absorption speed and high water retention capacity, it is widely used in sanitary produc...

Claims

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Application Information

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IPC IPC(8): C08F220/06C08F220/58C08F220/56C08F226/04C08F220/34C08F220/60
Inventor 周爱军付艳梅万香港钟毅江学良曾水娟
Owner WUHAN INSTITUTE OF TECHNOLOGY
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