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Preparation method of urine-tolerant absorbent resin

A technology of water-absorbent resin and deionized water is applied in the field of preparation of urine-resistant water-absorbent resin, which can solve the problems of poor urine resistance, high soluble content, affecting the air permeability of diapers, etc. The effect of excellent urine resistance

Inactive Publication Date: 2017-01-04
SHANDONG NUOER BIOLOGICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are certain defects in such products: 1. Poor urine resistance. During the use of diapers, the hardness of the water-absorbent resin gradually decreases with time, which affects the air permeability of diapers; High, when the diaper absorbs too much urine
[0003] At present, there are no reports and publications of water-absorbent resins with excellent urine resistance for hygiene purposes.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0014] A method for preparing a urine-resistant water-absorbing resin, which consists of the following raw materials in parts by weight:

[0015] Acrylic acid 30-60, 50% sodium hydroxide solution 20-30, crosslinking agent 5-10, initiator 0.5-2, deionized water 60-100; the preparation method is as follows:

[0016] (1) Add acrylic acid, 50% sodium hydroxide solution, crosslinking agent and deionized water into the reactor and mix well;

[0017] (2) Deoxygenate with nitrogen for 10-30 minutes, add an initiator to polymerize at 0-10°C, and the temperature will no longer rise as the end of the reaction;

[0018] (3) The peak temperature is about 85-95°C, keep warm for 2-3 hours above 80°C, after the colloid is granulated and dried to a moisture content of <5%, add 4-10 parts by weight of surface treatment solution for surface treatment , heat at 130-190°C for 30-60 minutes to obtain the product.

[0019] The crosslinking agent is a composite crosslinking agent, which is a mixtur...

Embodiment 1

[0023] Choose acrylic acid 30, 50% sodium hydroxide solution 20, crosslinking agent 5, deionized water 60, initiator 0.5 in parts by weight.

[0024] Prepare the surface treatment solution: mix glycerin 2, aluminum sulfate 1.5 and deionized water 6.5 according to the mass ratio to form a solution.

[0025] (1) Add acrylic acid, 50% sodium hydroxide solution, crosslinking agent and deionized water into the reactor and mix well;

[0026] (2) Deoxygenate with nitrogen for 10 minutes, add an initiator to polymerize at 0°C, and the reaction is considered to be over if the temperature does not rise any longer;

[0027] (3) The peak temperature is kept at 85°C for 2 hours, the colloid is granulated and dried until the moisture content is <5%, and 4 parts by weight of surface treatment solution is added for surface treatment, and the product is obtained at 140°C for 30 minutes.

Embodiment 2

[0029] Choose 50% acrylic acid, 25% 50% sodium hydroxide solution, 80% crosslinking agent, 80% deionized water, and 1 initiator by weight.

[0030] Prepare the surface treatment solution: mix glycerin 2, aluminum sulfate 1.5 and deionized water 6.5 according to the mass ratio to form a solution.

[0031] (1) Add acrylic acid, 50% sodium hydroxide solution, crosslinking agent and deionized water into the reactor and mix well;

[0032] (2) Deoxygenate with nitrogen for 20 minutes, add an initiator to polymerize at 5°C, and the temperature will no longer rise as the end of the reaction;

[0033] (3) The temperature peak is kept at 90°C for 2.5 hours, the colloid is granulated and dried until the moisture content is <5%, and 8 parts by weight of surface treatment solution is added for surface treatment, and the product is obtained at 160°C for 50 minutes.

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Abstract

The invention discloses a preparation method of urine-tolerant absorbent resin; the urine-tolerant absorbent resin is made from, by weight, 30-60 parts of acrylic acid, 20-30 parts of 50% sodium hydroxide solution, 5-10 parts of a crosslinking agent, 0.5-2 parts of an initiator, and 60-100 parts of deionized water; the preparation method comprises: adding the materials into a reactor, and mixing well; introducing nitrogen to remove oxygen, and adding the initiator for polymerizing; holding a peak temperature of 85-95 DEG C for 2-3 hours, granulating and drying colloid to a water content of 5%, adding a surface treating liquid for surface treatment, and holding the temperature of 130-190 DEG C for 30-60 min to obtain the resin. The preparation method is convenient, and the process is simple; the preparation method has the advantages that resin particles are good in urine tolerance, the original particle hardness and breathability can be maintained for a long time after certain artificial urine is absorbed, the resin is suitable particularly for use in sanitary products such as ultrathin baby diapers, baby paper diapers and adult diapers.

Description

technical field [0001] The invention relates to the technical field of resin preparation, in particular to a method for preparing a urine-resistant water-absorbing resin. Background technique [0002] In the world's super absorbent resin production, polyacrylic acid accounts for 80%. It is widely used in disposable diapers and sanitary products because of its super water absorption and water retention functions, and this application accounts for more than 90% of SAP demand. However, there are certain defects in such products: 1. Poor urine resistance. During the use of diapers, the hardness of the water-absorbent resin gradually decreases with time, which affects the air permeability of diapers; 2. The soluble content is too high High, when the diaper absorbs too much urine. [0003] At present, there is no report or publication of a hygienic water-absorbing resin with excellent urine resistance. Contents of the invention [0004] The purpose of the present invention is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/06C08F220/06C08F222/38C08J7/12C08J7/00C08L51/08
CPCC08F283/065C08J7/00C08J7/12C08J2351/08C08F220/06C08F222/385
Inventor 荣敏杰于庆华许永升杨光杰荣帅帅
Owner SHANDONG NUOER BIOLOGICAL TECH
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