Modification method for improving saline tolerance of acrylic acid macromolecule water uptake resin

A polymer water-absorbing and acrylic acid technology, which is applied in the field of modification to improve the salt resistance of acrylic polymer water-absorbing resins, can solve the problems of high viscosity of the polymerization system, difficult post-processing, and difficulty in dissipating heat, and achieves fast polymerization speed and stirring The effect of easy rate control and low production cost

Inactive Publication Date: 2009-04-08
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Solution polymerization is easy to operate and has no environmental pollution, but the heat generated by the reaction is difficult to dissipate, and the viscosity of the polymerization system is too high, so post-processing is very difficult

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The modification method for improving the salt resistance of the acrylic polymer water-absorbent resin adopts the method of inverse suspension emulsion polymerization, and it comprises the following steps:

[0027] 1) by weight parts of each composition raw material is:

[0028] n-Hexane 90,

[0029] Coconut Oil Diethanolamide 30,

[0030] Acrylic 20,

[0031] NaOH 5,

[0032] Calcium chloride 3,

[0033] N, N'-methylenebisacrylamide 0.03,

[0034] Ammonium persulfate 0.05,

[0035] water 32;

[0036] Select n-hexane, coconut oil diethanolamide, acrylic acid, sodium hydroxide, calcium chloride, N, N'-methylenebisacrylamide, ammonium persulfate and water;

[0037] 2) be that 20 parts by weight of water and sodium hydroxide are configured into a sodium hydroxide solution with a mass concentration of 20% first, then the remaining 12 parts of water and calcium chloride are configured into a 20% sodium chloride solution with a mass concentration calcium solution;

...

Embodiment 2

[0040] The modification method for improving the salt resistance of the acrylic polymer water-absorbent resin adopts the method of inverse suspension emulsion polymerization, and it comprises the following steps:

[0041] 1) by weight parts of each composition raw material is:

[0042] n-Hexane 100,

[0043] Coconut Diethanolamide 40,

[0044] Acrylic 20,

[0045] NaOH 8,

[0046] Calcium chloride 5,

[0047] N, N'-methylenebisacrylamide 0.04,

[0048] Ammonium persulfate 0.08,

[0049] water 52;

[0050] Select n-hexane, coconut oil diethanolamide, acrylic acid, sodium hydroxide, calcium chloride, N, N'-methylenebisacrylamide, ammonium persulfate and water;

[0051] 2) be that 32 parts by weight of water and sodium hydroxide are configured into a sodium hydroxide solution with a mass concentration of 20%, and then remaining water (20 parts) and calcium chloride are configured into a 20% mass concentration Calcium chloride solution;

[0052] 3) Add sodium hydroxide so...

Embodiment 3

[0054] The modification method for improving the salt resistance of the acrylic polymer water-absorbent resin adopts the method of inverse suspension emulsion polymerization, and it comprises the following steps:

[0055] 1) by weight parts of each composition raw material is:

[0056] n-Hexane 120,

[0057] Coconut Diethanolamide 40,

[0058] Acrylic 30,

[0059] Sodium hydroxide 10,

[0060] Calcium chloride 8,

[0061] N, N'-methylenebisacrylamide 0.1,

[0062] Ammonium persulfate 0.16,

[0063] water 74;

[0064] Select n-hexane, coconut oil diethanolamide, acrylic acid, sodium hydroxide, calcium chloride, N, N'-methylenebisacrylamide, ammonium persulfate and water;

[0065] 2) be that 40 parts by weight of water and sodium hydroxide are configured into a sodium hydroxide solution with a mass concentration of 20%, and then remaining water (32 parts) and calcium chloride are configured with a mass concentration of 20% Calcium chloride solution;

[0066] 3) Add sodium...

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PUM

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Abstract

The invention relates to a modification method for improving the salt tolerance of a crylic acid macromolecule absorbent resin. The modification method for improving the salt tolerance of the crylic acid macromolecule absorbent resin is characterized by comprising the following steps: 1) according to the parts of all component raw materials by weight as follows: 90 portions to 140 portions of n-hexane, 30 portions to 50 portions of coconut oil diethanolamide, 20 portions to 40 portions of crylic acid, 5 portions to 12 portions of sodium hydroxide, 3 portions to 15 portions of calcium chloride, 0.03 portion to 1 portion of N, N'- methylene bisacrylamide, 0.05 portion to 1 portion of ammonium peroxydisulfate and 32 portions to 100 portions of water, raw materials are selected; 2) water is respectively mixed with the sodium hydroxide and the calcium chloride so as to obtain sodium hydroxide solution and calcium chloride solution; and 3) all raw materials are added into a reaction kettle with a water bath, the water bath temperature is risen to 70 DEG C to 80 DEG C, the raw materials are stirred for 4 hours to 6 hours at the temperature for reaction, finally a reaction product is taken out; and after being dried, the reaction product is the modified crylic acid macromolecule absorbent resin. The method can evidently improve the salt tolerance of the crylic acid macromolecule absorbent resin and has low production cost.

Description

technical field [0001] The invention relates to a modification method for improving the salt resistance of an acrylic polymer water-absorbing resin. Background technique [0002] In the prior art, the synthesis method of the acrylic polymer water-absorbing resin mainly adopts methods such as solution polymerization and reverse suspension polymerization. Solution polymerization is easy to operate and has no environmental pollution, but the heat generated by the reaction is difficult to dissipate, and the viscosity of the polymerization system is too high, so post-processing is very difficult. [0003] The traditional method of modifying the salt resistance of water-absorbent resins is mainly to increase the water-absorbing capacity of water-absorbent resins by adding macromolecules with high molecular weight (such as starch, sugars, fibers, etc.) To enhance its ability to absorb salt water, so as to achieve the effect of improving its salt tolerance, belongs to the organic m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/06C08F2/32C08F8/18
Inventor 王勇邢凯华邓雷张联盟
Owner WUHAN UNIV OF TECH
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