Preparation method of super water absorbent resin

A super absorbent resin, water-soluble technology, applied in the field of polymer preparation, can solve the problems of difficult control of product particle size and particle size distribution, unstable suspension and dispersion system, sticking and agglomeration, etc. The effect of fast liquid speed and high water absorption capacity

Active Publication Date: 2012-06-20
浙江卫星新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a preparation method of superabsorbent resin, aiming at the instability of suspension dispersion system when preparing superabsorbent resin by reverse phase suspension polymerization, it is easy to explode, stick and agglomerate, and the particle size and particle size distribution of the product are diffic...

Method used

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  • Preparation method of super water absorbent resin

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Experimental program
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Effect test

Embodiment 1

[0031] Embodiment 1: the n-heptane that takes by weighing 210g is put into the five-necked 500ml spherical flask that reflux condenser, dropping funnel, thermometer, nitrogen gas inlet tube and stirring paddle are equipped with. Add 0.2g of SPAN-20, 0.2g of SPAN-60, and 0.6g of triglycerol monostearate to the n-heptane in the flask, heat up to 70°C while stirring to dissolve the surfactant, stir at 300rpm, and cool to 50°C.

[0032] Weigh 18g of acrylic acid and 15.8g of deionized water in the Erlenmeyer flask, dropwise add 23.3g of 32% (mass percentage) sodium hydroxide aqueous solution while cooling from the outside, and after 75% (mol percentage) neutralization, add 5% ( Mass percent) potassium persulfate aqueous solution 0.54g, 2.5% (mass percent) N,N-methylenebisacrylamide aqueous solution 0.29g, add 40% (mass percent) silica sol 1.8g, stir well, and prepare the first 1-step monomer aqueous solution. Add all the monomer aqueous solution in the first step into the above-...

Embodiment 2

[0035] Example 2: Except when preparing the monomer aqueous solution in the first step in Example 1, the addition content is 40% (mass percentage) silica sol becomes 0.9g, when preparing the monomer aqueous solution in the second step, the addition content is 40% (mass percentage) silica sol becomes 1.25g, other is the same as embodiment 1.

Embodiment 3

[0036] Embodiment 3: except that when preparing the monomer aqueous solution of the 1st step in embodiment 1, do not add silica sol, when preparing the monomer aqueous solution of the 2nd step, do not add silica sol, other is the same as embodiment 1.

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Abstract

The invention provides a preparation method of super water absorbent resin. A free radical polymerization initator is used in a petroleum hydrocarbons solvent containing a surfactant and/or macromolecular protective colloid, a water-solubility olefinic unsaturated monomer is subjected to anti-phase suspension polymerization in water-in-oil system due to the existence of an inner cross-linking agent, and substances containing Si-OH and/or Si-O groups are added in the polymerization reaction and aftertreatment process, so that the performance of the super water absorbent resin is improved. The super water absorbent resin prepared by the method has the advantages that the water retention capability is high, the capability of absorbing saline in one minute is high, the water absorbing capability under compression is high, the liquid absorbing speed is quick and the like.

Description

technical field [0001] The invention relates to a method for preparing a polymer, in particular to a method for preparing a superabsorbent resin. Background technique [0002] Superabsorbent resin is a kind of strong hydrophilic polymer compound with three-dimensional space network structure, and it is one of the new functional materials widely developed and researched at home and abroad in recent years. It has the ability to absorb water hundreds of times or even thousands of times its own mass, and it will not overflow under a certain pressure. Therefore, super absorbent resins are widely used in sanitary materials such as diapers, diapers, and sanitary products, water-retaining materials, soil, etc. Improvements and other agricultural and horticultural materials, water-cutting materials for cables, and other fields. As such superabsorbent resins, for example, partially neutralized polyacrylic acid, neutralized starch-acrylic acid graft polymer, hydrolyzate of starch-acry...

Claims

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Application Information

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IPC IPC(8): C08J3/24C08L33/02C08K3/36C08K5/25C08F220/06C08F220/56C08F220/54C08F220/28C08F2/32
Inventor 马国林韩伟恒
Owner 浙江卫星新材料科技有限公司
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