Method for preparing special water-absorbing resin for adult diaper

A technology for water-absorbing resin and diapers, which is applied in the field of functional polymer chemical additives, can solve the problem of difficulty in taking into account gel strength, absorption speed and water retention at the same time, and achieve the effect of fast absorption speed and large water retention capacity.

Active Publication Date: 2016-09-21
SHANDONG NUOER BIOLOGICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For ordinary water-absorbent resins, it is difficult to take into account the three parameters of gel strength, absorption speed and water retention at the same time, so there are certain defects.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] Composition of raw materials and parts by weight of each component: Acrylic acid 30, 50% sodium hydroxide solution 20, acrylamide 6, crosslinking agent 5, hydroxycyclopentadiene 60, deionized water 60, hydrogen peroxide 0.8, ascorbic acid 0.6.

[0010] 1. Add acrylic acid, 50% sodium hydroxide solution, acrylamide, crosslinking agent, hydroxycyclopentadiene and deionized water into the reactor and mix well, then pass high-purity nitrogen gas to remove oxygen for 20 minutes.

[0011] 2. Add the initiator to initiate the polymerization reaction at 5°C, and the temperature will no longer rise as the end of the reaction. The peak temperature is about 85°C, and the temperature is kept for 2 hours.

[0012] 3. Granulate the colloid and dry it at 140°C until the moisture content is <3%.

[0013] 4. Add 1,4-butanediol 2 by evenly spraying the granules.

[0014] 5. Spray the surface treatment solution 5 evenly on the particles, and keep it warm at 140°C for 40 minutes.

[001...

Embodiment 2

[0026] Raw material composition and parts by weight of each component: Acrylic acid 45, 50% sodium hydroxide solution 30, acrylamide 8, crosslinking agent 8, hydroxycyclopentadiene 90, deionized water 80, hydrogen peroxide 1, ascorbic acid 0.7.

[0027] 1. Add acrylic acid, 50% sodium hydroxide solution, acrylamide, crosslinking agent, hydroxycyclopentadiene and deionized water into the reactor and mix well, then pass high-purity nitrogen gas to remove oxygen for 20 minutes.

[0028] 2. Add the initiator to initiate the polymerization reaction at 6°C, and the temperature will no longer rise as the reaction is over. The peak temperature is 90°C, and the temperature is kept for 2 hours.

[0029] 3. Granulate the colloid and dry it at 140°C until the moisture content is <3%.

[0030] 4. Add 1,4-butanediol 2 by evenly spraying the granules.

[0031] 5. Spray the surface treatment solution 5 evenly on the particles, and keep it warm at 140°C for 40 minutes.

[0032] 6. Then add ...

Embodiment 3

[0043] Raw material composition and parts by weight of each component: Acrylic acid 60, 50% sodium hydroxide solution 30, acrylamide 10, crosslinking agent 10, hydroxycyclopentadiene 120, deionized water 100, hydrogen peroxide 1.2, ascorbic acid 0.7.

[0044] 1. Add acrylic acid, 50% sodium hydroxide solution, acrylamide, crosslinking agent, hydroxycyclopentadiene and deionized water into the reactor and mix well, then pass high-purity nitrogen gas to remove oxygen for 20 minutes.

[0045] 2. Add the initiator to initiate the polymerization reaction at 10°C, and the temperature will no longer rise as the reaction is over. The peak temperature is about 90°C, and the temperature is kept above 80°C for 2 hours.

[0046] 3. Granulate the colloid and dry it at 140°C until the moisture content is <3%.

[0047] 4. Add 1,4-butanediol 3 by evenly spraying the granules.

[0048] 5. Spray the surface treatment solution 5 evenly on the particles, and keep it warm at 140°C for 40 minutes...

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PUM

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Abstract

The invention discloses a method for preparing special water-absorbing resin for an adult diaper. The water-absorbing resin is prepared from, by weight, 30 parts of acrylic acid, 20 parts of 50% sodium hydroxide solution, 6 parts of acrylamide, 5 parts of cross-linking agent, 60 parts of hydroxyl cyclopentadiene, 60 parts of deionized water, 0.8 part of hydrogen peroxide and 0.6 part of initiator. All the raw materials except hydrogen peroxide and the initiator are added into a reactor to be evenly mixed, and then nitrogen is introduced to remove oxygen; then the initiator is added to initiate polymerization reaction; the temperature of 85 DEG C is preserved for 2 hours; colloid is granulated and dried at the temperature of 140 DEG C till the water content is smaller than 3%; 1,4-butanediol is evenly sprayed to particles; surfactant is evenly sprayed to the particles, and the temperature of 140 DEG C is preserved for 40 min; finally, a 30% aluminum sulfate solution is added, the temperature of 120 DEG C is preserved, and the resin is obtained. The resin manufactured through the method is large in water retaining capacity, high in absorbing speed, flexible after water absorption, not prone to break when bearing pressure and particularly suitable for the adult diaper, and water absorbed in the resin cannot be squeezed out due to external force.

Description

technical field [0001] The invention relates to the technical field of functional polymer chemical additives, in particular to a preparation method of a special water-absorbing resin for adult diapers. Background technique [0002] At present, in the production of superabsorbent resin in the world, the proportion used for adult diapers is increasing. Because adults have a large amount of urine and a large body weight, it is required that the polymer of adult diapers should have several characteristics such as fast absorption speed, large absorption capacity, and high gel strength, otherwise it is easy to leak urine during use. . For ordinary water-absorbent resins, it is difficult to simultaneously consider the three parameters of gel strength, absorption speed and water retention, so there are certain defects. Contents of the invention [0003] The object of the present invention is to provide a preparation method of a water-absorbent resin specially used for adult diap...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F232/06C08F220/06C08F220/56C08J3/00
CPCC08F232/06C08J3/00C08J2345/00C08F220/06C08F220/56
Inventor 荣敏杰许永升于庆华
Owner SHANDONG NUOER BIOLOGICAL TECH
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