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Preparation method of spherical water-absorbent resin and cold warm compress product thereof

A water-absorbing resin, spherical technology, applied in the field of polymer resin preparation, can solve problems such as unfavorable industrial production, increase in resin particle size factors, increase in synthesis steps, etc., and achieve simple equipment, excellent heat and cold storage performance, and shortened reaction time. Effect

Active Publication Date: 2013-06-05
SHANGHAI CHUANGSHI MEDICAL TECH (GRP) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method increases the synthesis steps and increases the factors affecting the particle size of the resin, which is not conducive to industrial production.

Method used

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  • Preparation method of spherical water-absorbent resin and cold warm compress product thereof
  • Preparation method of spherical water-absorbent resin and cold warm compress product thereof
  • Preparation method of spherical water-absorbent resin and cold warm compress product thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The preparation method of the spherical water-absorbent resin in this embodiment comprises the following steps:

[0031] Step 1, the preparation of aqueous phase solution:

[0032] Add 13.2g of NaOH to 29.2g of water, stir to make it completely dissolve and cool down. After the NaOH solution drops to room temperature, add this solution to 22.2g of methacrylic acid monomer, and stir and cool it. When the temperature is below 25°C, adjust the pH to 6.5-6.7;

[0033] Then add 0.1~0.2g of cross-linking agent N,N-methylenebisacrylamide, stir rapidly until it is completely dissolved, then add 0.08~0.1g of potassium persulfate, 0.004~0.006g of Sodium bisulfate and 0.01g of triethanolamine, keep the temperature of the system at about 10°C to obtain an aqueous phase solution; the density of the aqueous phase solution is 0.9g / cm 3 .

[0034] Step 2, preparation of oil phase solution:

[0035] Take by weighing 250g glyceryl monostearate, 150kg dimethyl carbonate, 100kg hexanap...

Embodiment 2

[0041] The preparation method of the spherical water-absorbent resin in this embodiment comprises the following steps:

[0042] Step 1, the preparation of aqueous phase solution;

[0043] Add 19.3g of KOH to 23.2g of water, stir to make it completely dissolve and cool down. After the KOH solution drops to room temperature, add this solution to 29.2g of butyl methacrylate monomer, and stir and cool. After cooling to below 25°C, adjust the pH within the range of 6.5 to 6.7;

[0044] Then add 0.1~0.2g of cross-linking agent N,N-methylenebisacrylamide, stir rapidly until it is completely dissolved, then add 0.08~0.1g of potassium persulfate, 0.004~0.006g of The hydrogen peroxide (mass fraction is 30%) of sodium bisulfate and 0.01g, keeps system temperature at about 10 ℃; The density of described aqueous phase solution is 1.0g / cm 3 ;

[0045] Step 2, the preparation of oil phase solution;

[0046] Take by weighing 300g ethyl cellulose, 100kg dimethyl carbonate, 150kg carbon tet...

Embodiment 3

[0052] The preparation method of the spherical water-absorbent resin in this embodiment comprises the following steps:

[0053] Step 1, the preparation of aqueous phase solution;

[0054] Add 21.5g of NaOH to 26.2g of water, stir to make it completely dissolve and cool down. After the NaOH solution drops to room temperature, add this solution to 30.2g of methacrylic acid monomer, and stir and cool it. When the temperature is below 25°C, adjust the pH within the range of 6.5 to 6.7;

[0055] Then add 0.05~0.1g of cross-linking agent N,N-methylenebisacrylamide, stir rapidly until it is completely dissolved, then add 0.08~0.1g of potassium persulfate, 0.004~0.006g of Sodium bisulfate and 0.01g of diethanolamine, keep the system temperature at about 10°C; the density of the aqueous phase solution is 1.0g / cm 3 ;

[0056] Step 2, the preparation of oil phase solution;

[0057] Take by weighing 500g sorbitan oleate, 300kg dimethyl carbonate and premix evenly to obtain an oil phas...

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Abstract

The invention relates to a preparation method of spherical water-absorbent resin and a cold warm compress product thereof. Especially, the invention relates to a preparation method of spherical water-absorbent resin, which comprises the following steps: step one, preparation of a water-phase solution, that is, preparing an alkali aqueous solution, then adding the aqueous solution into monomer methacrylic acid or its ester derivatives, stirring for dissolution to obtain mother liquor; adding a cross-linking agent, an initiator and an optional polymerization promoter into the mother liquor to obtain the water-phase solution; step two, preparation of an oil-phase solution, that is, adding ethyl cellulose, monoglyceride stearate, or sorbitan oleate into a solvent, uniformly stirring to obtain the oil-phase solution; step three, preparing the spherical water-absorbent resin by using a polymerization device. The spherical water-absorbent resin synthesized by the method of the invention is uniform in size, and spherical water-absorbent resins with different sizes can be obtained by adjusting the pore size and number of a screen mesh in the polymerization device; the preparation method and the device are simple; the reaction time is shortened greatly, and the yield is high.

Description

technical field [0001] The invention relates to a method for preparing a polymer resin, in particular, the invention relates to a method for preparing a spherical water-absorbing resin and its cold and hot compress products. Background technique [0002] Super absorbent resin (abbreviated as SAP) is a new type of functional polymer material widely researched and developed at home and abroad. At present, countries all over the world have carried out a lot of research work on superabsorbent resin, and have made great progress in its varieties, manufacturing methods, performance and application fields. Developed countries such as the United States, Japan, Germany, and France have been at the forefront. Although the research and development of SAP in my country started relatively late, it has developed very rapidly. [0003] Superabsorbent resin polymerization methods include solution method, inverse suspension method, inverse emulsion method, dispersion polymerization method a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/06C08F220/18C08F2/48C08F2/32A61F7/00
Inventor 范立涛尤勇
Owner SHANGHAI CHUANGSHI MEDICAL TECH (GRP) CO LTD
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