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Method for processing high-performance water-absorbent resin through electron beam irradiation

A technology of electron beam irradiation and water-absorbing resin, which is applied in the field of electron beam irradiation processing high-performance water-absorbing resin, which can solve the problems of small surface area of ​​water-absorbing resin particles, high requirements for process control adjustment and control, and slow water absorption speed.

Inactive Publication Date: 2015-11-25
CGN DASHENG ELECTRON ACCELERATOR TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004]The method of reverse suspension solution polymerization produces superabsorbent resin, which can obtain excellent product quality, but there are outstanding problems affecting its development: the use of a large amount of organic solvents , the process must be processed and recycled. Due to the flammability and explosion of the solvent, the operation of the process equipment is required to be very strict, and there is a danger of explosion and pollution to the environment.
In the first two patents, the prepared water-absorbent resin particles have a smaller surface area and slower water absorption speed
Although the third patented method of spraying electron beam irradiation can produce water-absorbing resins that absorb water quickly, it is difficult to adjust the flow rate, flow rate and coordination relationship with the radiation dose of the material liquid for the size of the particles; In addition, the use of tube bundle airflow equipment to dry the sprayed material particles requires relatively high requirements for the process control of the flow rate and flow rate of the equipment, and the adjustment and control of the dryness of the material; if the airflow drying method is not used, it is easy to cause some materials to stick. The degree of fragmentation of the particles is high, which affects the physical properties of the finished product

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] (1) Put 1,000 parts of acrylic acid into a mixing tank, neutralize with 30% sodium hydroxide solution to a neutralization degree of 77%, add 50 parts by weight of 2-acrylamide-2-methylpropanesulfonic acid, add N,N- 2 parts by weight of methylene bis(meth)acrylamide, 1 part by weight of polyethylene glycol diacrylate, 10 parts by weight of sodium dodecylbenzenesulfonate, and 10 parts by weight of ethanol, and stir evenly to obtain a material solution to be polymerized;

[0058] (2) Send the liquid prepared in (1) to the freezer for freezing at -20°C for 20 hours;

[0059] (3) The frozen material obtained in (2) is irradiated with electron beams, so that the absorbed dose of the material reaches 15kGy, and the gel is obtained;

[0060] (4) Keep the gel at 110°C for 80 minutes, then dry, crush and sieve to obtain semi-finished granules.

[0061] (5) Add 100 parts of the semi-finished granules obtained in (4) to 5% surface cross-linking liquid, control the reaction at 200°...

Embodiment 2

[0063] (1) Put 1,000 parts of acrylic acid into a mixing tank, neutralize with 30% sodium hydroxide solution to a neutralization degree of 77%, add 50 parts by weight of 2-acrylamide-2-methylpropanesulfonic acid, add N,N- 3 parts by weight of methylene bis(meth)acrylamide, 0.3 parts by weight of polyethylene glycol diacrylate, 5 parts by weight of sodium lauryl sulfate, and 8 parts by weight of pentane, stirred evenly to obtain a material solution to be polymerized;

[0064] (2) Freeze the material in (1) at -30°C for 36 hours, and irradiate with electron beams to make the absorbed dose of the material reach 12kGy to obtain a gel;

[0065] (3) Keep the gel obtained in (2) at 120°C for 2 hours, dry, pulverize, and sieve to obtain semi-finished granules.

[0066] (4) Add 6% of the surface cross-linking solution to the semi-finished granules obtained in (3), control the reaction at 210°C±10°C for 40 minutes, and spray 3% pure water when cooled to 50°C and mix evenly to obtain a s...

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Abstract

The invention discloses a method for processing high-performance water-absorbent resin through electron beam irradiation. The method includes the following steps that 1, feed liquid to be polymerized is quickly frozen; 2, the frozen polymerized material is placed under electron beam irradiation of an electron accelerator, and then water-absorbent gel is obtained; 3, the water-absorbent gel is kept for a period of time at high temperature, dried, smashed and screened, and then semi-finished particles are obtained; 4, surface crosslinking treatment is conducted on the semi-finished particles, and then the finished high-performance water-absorbent resin is obtained.

Description

technical field [0001] The invention relates to a method for processing high-performance water-absorbing resin by electron beam irradiation, and belongs to the technical field of irradiation chemical synthesis. Background technique [0002] High-performance water-absorbing resin refers to a functional polymer synthetic material whose water absorption rate is dozens or even thousands of times its own mass. Water conservation and soil conditioning, medical and sanitary products (such as sanitary napkins, diapers, sanitary care mattresses, etc.), flood control and water blocking, building moisturizing and water sealing materials, cable water blocking, food preservation, daily chemicals, fire protection Fire extinguishing and many other fields, and with the development of science and technology, its application range will be wider. [0003] In the polymerization reaction of synthesizing high-performance water-absorbing resins, most of the dominant synthetic routes and preparati...

Claims

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Application Information

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IPC IPC(8): C08F220/06C08F222/38C08F222/14C08F2/46C08J7/16C08J3/12C08L33/02
Inventor 郑庆信刘颖肖峰苏春朱南康
Owner CGN DASHENG ELECTRON ACCELERATOR TECH
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