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Surface modification method and surface modification liquid for ultra-fine super-absorbent resin powder

A technology of superabsorbent resin and ultrafine powder, which is applied in the field of superabsorbent resin ultrafine powder surface modification method and modifying liquid, can solve the problems such as not finding a reasonable modification method, and achieve good surface active function, Reduces stickiness and improves dryness

Active Publication Date: 2019-01-29
ZHONGKAI UNIV OF AGRI & ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For ultra-fine superabsorbent resin powder with small particle size, it is easy to quickly absorb solution and agglomerate during the modification process, so far no reasonable modification method has been found.

Method used

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  • Surface modification method and surface modification liquid for ultra-fine super-absorbent resin powder
  • Surface modification method and surface modification liquid for ultra-fine super-absorbent resin powder
  • Surface modification method and surface modification liquid for ultra-fine super-absorbent resin powder

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preparation example Construction

[0060] Correspondingly, the present invention also provides a method for preparing a superabsorbent resin surface modification liquid, which includes:

[0061] (1) dispersing the dispersant in water to obtain a mixed solution;

[0062] (2) uniformly dispersing the surface crosslinking agent and the initiator in the mixed solution to obtain the oil-in-water type surface modification solution;

[0063] Correspondingly, the present invention also provides a superabsorbent resin, which is modified by the above-mentioned surface modification method.

Embodiment 1

[0066] Surface modification fluid formula:

[0067] 50 parts of water, 34 parts of dispersant, 11 parts of surface crosslinking agent, 0.3 parts of initiator, 5 parts of white carbon black;

[0068] Among them, the dispersant is methanol, the surface crosslinking agent includes 2 parts of ethylene glycol diglycidyl ether, 6 parts of 1,4-butanediol, and 3 parts of trimethylhydroxypropane triacrylate; 0.1 part of morphine hydrochloride (Va044) and 0.2 part of ammonium persulfate;

[0069] Surface modification method:

[0070] (1) Add the dispersant and white carbon black into the water, and evenly stir to obtain the mixed solution;

[0071] (2) Surface crosslinking agent and initiator are added in the mixed solution, and the surface modification solution is obtained after stirring;

[0072] (3) Weigh 14 parts of the above-mentioned reaction solution, and evenly spray on the surface of 100 parts of superabsorbent resin superfine powder, stir vigorously during the spraying proc...

Embodiment 2

[0076] Surface modification fluid formula:

[0077] 60 parts of water, 24 parts of dispersant, 11 parts of surface crosslinking agent, 0.3 parts of initiator, 5 parts of white carbon black;

[0078] Among them, ethanol is selected as the dispersant, and the surface crosslinking agent includes 2 parts of ethylene glycol diglycidyl ether, 6 parts of 1,4-butanediol, 3 parts of nonamethylhydroxypropane triacrylate; the initiator includes azobisisobutyl 0.1 part of imidazoline hydrochloride (Va50) and 0.2 part of ammonium persulfate;

[0079] Surface modification method:

[0080] (1) Add the dispersant and white carbon black into the water, and evenly stir to obtain the mixed solution;

[0081] (2) Surface crosslinking agent and initiator are added in the mixed solution, and the surface modification solution is obtained after stirring;

[0082] (3) Weigh 12 parts of the above reaction solution, and evenly spray on the surface of 100 parts of superabsorbent resin superfine powder...

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Abstract

The invention discloses a surface modification method for ultra-fine super-absorbent resin powder. The surface modification method comprises the following steps: dispersing a dispersing agent in water, and adding a surface cross-linking agent and an initiator to obtain an oil-in-water surface modification liquid; uniformly coating the surface of the ultra-fine super-absorbent resin powder with thesurface modification liquid; and carrying out treatment at 50-80 DEG C and at 110-150 DEG C successively so as to obtain the surface-modified ultra-fine super-absorbent resin powder. The invention also discloses the surface modification solution. The surface modification solution comprises, by weight, 40-70 parts of water, 20-50 parts of the dispersing agent, 5-20 parts of the surface cross-linking agent and 0.01-2 parts of the initiator. The invention adopts the specific surface modification liquid to realize the modification of the ultra-fine super-absorbent resin powder with a size of lessthan 150 meshes, so the moisture resistance, yellowing resistance and absorption permeability of the ultra-fine super-absorbent resin powder are improved.

Description

technical field [0001] The invention relates to a method for modifying a superabsorbent resin, in particular to a method for modifying the surface of superfine powder of a superabsorbent resin and a modifying solution. Background technique [0002] Super Absorbent Polymer (SAP) is a new type of functional polymer material. A synthetic resin with hydrophilic groups that can absorb a large amount of water and swell while keeping the water from flowing out. At present, superabsorbent resin (superfine superabsorbent resin powder) products generally absorb air moisture and cause yellowing or stickiness during storage, which brings a lot of inconvenience during production and use, and will cause Serious impact on the product, such as affecting the transportation, storage and application of the product, how to effectively prevent the superabsorbent resin superfine powder from absorbing air moisture and causing yellowing has become the concern and hard work of the superabsorbent re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/12C08L101/12
CPCC08J3/128C08J2300/12
Inventor 刘其海贾振宇
Owner ZHONGKAI UNIV OF AGRI & ENG