Preparation method for high-performance absorbent resin

A water-absorbent, high-performance technology, which is applied in the field of preparation of high-performance water-absorbent resins, can solve the problems of not being able to fully improve the performance requirements of super-absorbent resins, and achieve the effect of simple manufacturing process

Active Publication Date: 2012-10-17
SHANGHAI HUAYI NEW MATERIAL
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Problems solved by technology

[0006] The above process methods cannot comprehensively improve the various per

Method used

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  • Preparation method for high-performance absorbent resin
  • Preparation method for high-performance absorbent resin
  • Preparation method for high-performance absorbent resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] The drying conditions are: the drying constant speed section is divided into 2 zones, the hot air inlet temperature is 150-160°C, the temperature passing through the material layer is 70-150°C, the gas flow rate is 1m / s, and the gel particles exiting the constant speed section The water content is about 30wt%, and the residence time in the constant speed section is 15min; the drying deceleration section is also divided into 2 zones, the temperature of the hot air inlet is 160-180°C, and the temperature of the material layer passing through is 150-180°C. The gas flow rate is 3m / s, the water content of the gel particles exiting the speed-down section is about 6wt%, the residence time of the material in the speed-down section is 15min, and then the dried material enters the cooling zone to cool down the dry material, and the temperature of this section is 50 ~80°C, the flow rate of the cooling gas is 3m / s, the residence time of this section is 5 minutes, and the water conte...

Embodiment 2

[0046] Drying conditions are as in Example 1, change the gas flow rate of the drying constant speed section to 2.0m / s, and the residence time in the constant speed section is 15min; The hot air temperature and gas flow rate do not change, and the water content of the gel particles in the decelerating section is about 4%. The conditions of the drying and cooling section are also as in Example 1, and the water content of the dried particles after cooling is 3wt%.

[0047] The particles obtained by the above drying are crushed and sieved to obtain particles with an average particle size of 380 μm, and the obtained particles are subjected to particle surface treatment as in Example 1. After the particles are cooled to 70° C. through surface crosslinking reaction, 1.0% by weight of Aluminum sulfate particles (particles <100 μm), and 2% by weight aqueous solution of polyoxyethylene sodium stearate (200 ppm). The properties of the finally obtained water-absorbent resin product are sh...

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Abstract

The invention relates to a preparation method for high-performance absorbent resin. The preparation method comprises the following steps that: (1) wide super-absorbent resin gel with the water content being 50wt% which is obtained by free radical polymerization reaction on a continuous cycle belt is pelleted and a redox initiator is added during gel pelleting; (2) after pelleting, the gel grains are evenly distributed on a circulating air belt-type machine for drying, the drying process is divided into three stages of drying constant speed stage, drying speed reduction stage and drying cooling stage and the temperature and the air speed of hot air of a drier are adjusted according to the change of the water content of the gel at different drying stages; and (3) the dried materials which are obtained are crushed, grinded and screened to obtain the grains with qualified grain diameter; the surface of the super-absorbent resin grains with qualified grain diameter is coated with a superficial cross-linking agent; and the grains are heated and an anti-yellowing assistant and a grain moisture-proof clustering agent are added during the process that the materials are cooled. The absorbent resin gel prepared by the method provided by the invention has excellent physical usability.

Description

technical field [0001] The invention relates to a preparation method of high-performance water-absorbing resin. Background technique [0002] Since the development and industrial production of superabsorbent resin (SAP) began in the 1970s, the superabsorbent resin obtained by cross-linking and polymerizing acrylic acid and its acrylates is popular because of its easy availability of raw materials, low manufacturing cost and excellent product performance. Become the product of the most generalized large-scale industrialized production at present. The performance requirements of superabsorbent resins used in diapers, women's sanitary napkins and other hygienic fields have gone through three stages, from the initial emphasis on the saturated liquid absorption of water-absorbent resins, to the emphasis on pressurized liquid absorption, until the current requirements for products It has low residual monomer content, low water soluble matter, high pressurized liquid absorption ra...

Claims

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Application Information

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IPC IPC(8): C08F220/06C08F222/20C08F4/40C08J3/00C08J3/24C08L33/02
Inventor 周柳茵连旭罡王月珍禇小东马建学
Owner SHANGHAI HUAYI NEW MATERIAL
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