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High liquid absorption rate acrylic acid water-absorbent resin and its preparation method and use

A technology of water-absorbing resin and acrylic acid, which is applied in the direction of coating, etc., can solve the problems of difficult industrialization, high energy consumption, and insufficient environmental protection, and achieve the effect of strong foaming ability and increased specific surface area

Active Publication Date: 2017-01-04
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods are difficult to industrialize because of complex technology and high energy consumption, or because they are not environmentally friendly and do not conform to the future development trend of the industry, so it is difficult to effectively improve the liquid absorption rate of acrylic water-absorbent resins to meet market demand.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] a) Add 1250g of acrylic acid and 3020g of deionized water into the reactor with a high-speed stirring device, then slowly add 730g of 48% sodium hydroxide aqueous solution into the reactor, and control the temperature of the neutralizing solution to 60°C.

[0059] b) Add 3.125g pentaerythritol triacrylate, 0.125g blowing agent and 0.0375g sodium sulfite to the neutralized liquid obtained in step a), the blowing agent consists of sodium dodecylsulfonate and sodium rosinate in a mass ratio of 9 : 1 is formulated, after stirring and mixing evenly, the reaction solution is quickly added to the polymerization tank, and 25g of prepared 10wt% ammonium persulfate aqueous solution is added at the same time, and the hydrogel is obtained after polymerization for 20 minutes.

[0060] c) Crushing the hydrogel obtained in step b) with a screw extruder to obtain gel particles with a particle size of 8-14mm, then drying in an oven at 180°C for 120min, and then crushing with a pulverizer...

Embodiment 2

[0063] a) Add 2250g of acrylic acid and 460g of deionized water into the reactor with a high-speed stirring device, then slowly add 2290g of 48% sodium hydroxide aqueous solution into the reactor, and control the temperature of the neutralizing solution to 60°C.

[0064] b) Add 1.125g N,N-methylenebisacrylamide, 45g foaming agent and 1.125g sodium sulfite to the neutralized liquid obtained in step a), the foaming agent is composed of sodium lauryl sulfate and saponin It was prepared in 6:4. After stirring and mixing evenly, the reaction solution was quickly added to the polymerization tank, and 67.5g of the prepared 10% ammonium persulfate aqueous solution was added at the same time, and the hydrogel was obtained after polymerization for 5 minutes.

[0065] c) Crushing the hydrogel obtained in step b) with a screw extruder to obtain gel particles with a particle size of 6-12mm, then drying in an oven at 180°C for 120min, and then crushing with a pulverizer and grading with a si...

Embodiment 3

[0068] a) Add 1500g of acrylic acid and 2200g of deionized water into the reactor with a high-speed stirring device, then slowly add 1300g of 48% sodium hydroxide aqueous solution into the reactor, and control the temperature of the neutralizing solution to 60°C.

[0069] b) Add 4.5g polyethylene glycol diglycidyl ether, 6g foaming agent and 0.12g sodium bisulfite to the neutralized liquid obtained in step a), the foaming agent consists of sodium dodecylbenzenesulfonate and tea The saponin was prepared at a ratio of 7:3. After stirring and mixing evenly, the reaction liquid was quickly added to the polymerization tank, and 48g of the prepared 10% ammonium persulfate aqueous solution was added at the same time, and the hydrogel was obtained after 8 minutes of polymerization.

[0070] c) Crushing the hydrogel obtained in step b) with a screw extruder to obtain gel particles with a particle size of 4-10mm, then drying in an oven at 180°C for 120min, and then crushing with a pulver...

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Abstract

The invention provides high liquid absorption rate acrylic acid water-absorbent resin and its preparation method and use. The high liquid absorption rate acrylic acid water-absorbent resin is prepared from acrylic acid, an alkali, water, a cross-linking agent, a high temperature-resistant foaming agent, a copolymerization monomer, a reducer and an initiator. A mass ratio of the acrylic acid, alkali to water is (25-45): (7-22): (33-68) and based on the acrylic acid mass, a use ratio of the cross-linking agent is in a range of 0.001-1wt%, a use ratio of the high temperature-resistant foaming agent is in a range of 0.01-2wt%, a use ratio of the copolymerization monomer is in a range of 0-10wt%, a use ratio of the reducer is in a range of 30-500ppm and a use ratio of the initiator is in a range of 0.001-1wt%. A high liquid absorption rate of the acrylic acid water-absorbent resin is 15-40s. The acrylic acid water-absorbent resin can be used as a liquid absorption material in fields of paper diapers, baby diapers and sanitary napkins in the health care industry and can also be used as a water absorption and storage material in industries of desert treatment, water blockage in an oil field and agricultural and forestall water retention.

Description

technical field [0001] The invention relates to the field of chemical engineering, more specifically, the invention relates to a water-absorbing resin with high liquid absorption rate, its preparation method and application. Background technique [0002] Superabsorbent resin is a cross-linked network polymer containing a large number of strong polar groups. It was first prepared by Fanta et al. by grafting polyacrylonitrile with starch and then saponifying it. Since the 1960s, superabsorbent resins have been widely developed around the world, and can be divided into two categories according to raw materials: the first category is natural polymers, such as starch and cellulose; the second category is synthetic polymers, such as polymers. Acrylic acid, polyoxyethylene, polyvinyl alcohol, of which more than 80% of the current super absorbent resin is polymerized from acrylic acid monomers. Because the cross-linked acrylic water-absorbing resin has a network structure, it can a...

Claims

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Application Information

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IPC IPC(8): C08F220/06C08F120/06C08J9/04C08J7/04C08J3/24
CPCC08F120/06C08F220/06C08J3/24C08J9/04
Inventor 王刚张昌明李春刘波代春丽张志宇
Owner WANHUA CHEM GRP CO LTD
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