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Rubber powder/acrylic acid/montmorillonite high water absorption resin and its synthesis method

A technology of superabsorbent resin and acrylic acid, applied in the field of superabsorbent resin, can solve the problems of endangering the earth's ecological environment, deteriorating the natural environment, occupying large land, etc., achieving good economic and environmental benefits, stable and safe reaction, and fast polymerization speed Effect

Inactive Publication Date: 2009-10-14
NANJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These treatment methods not only occupy a large amount of land, but also tend to breed mosquitoes and spread diseases; or worsen the natural environment, destroy vegetation growth, affect human health, and endanger the ecological environment of the earth. Therefore, burial and incineration methods have been strongly opposed by people.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] Raw material ratio (all dosages are WT%):

[0065] Acrylic acid content 84.59%

[0066] Rubber powder dosage 10.58%

[0067] 80% neutralization of acrylic

[0068] Cross-linking agent dosage 0.13%

[0069] MMT dosage 4.23%

[0070] The dosage of initiator is 0.47%.

[0071] The rubber powder (RP) was pretreated with concentrated acid for 2 hours, and the acrylic acid (AA) was neutralized to a certain degree of neutralization with alkaline solution. Then add a certain quality of montmorillonite (MMT) and pretreated rubber powder (PRP) into the acrylic acid neutralizing solution, add the initiator and crosslinking agent under the protective atmosphere, shear at high speed, and keep the temperature at 60-80°C React for 3 hours, and dry at 110-130°C to obtain superabsorbent resin. The measured water absorption rate of the product is 834g·g -1 .

Embodiment 2

[0073] Acrylic acid content 86.43%

[0074] Rubber powder dosage 8.64%

[0075] 80% neutralization of acrylic

[0076] Cross-linking agent dosage 0.13%

[0077] MMT dosage 4.23%

[0078] The dosage of initiator is 0.48%.

[0079] The rubber powder (RP) was pretreated with concentrated acid for 2 hours, and the acrylic acid (AA) was neutralized to a certain degree of neutralization with alkaline solution. Then add a certain quality of montmorillonite (MMT) and pretreated rubber powder (PRP) into the acrylic acid neutralizing solution, add the initiator and crosslinking agent under the protective atmosphere, shear at high speed, and keep the temperature at 60-80°C React for 3 hours, and dry at 110-130°C to obtain superabsorbent resin. The measured water absorption rate of the product is 1017g·g -1 .

Embodiment 3

[0081] Acrylic acid content 84.64%

[0082] Rubber powder dosage 10.58%

[0083] 80% neutralization of acrylic

[0084] Cross-linking agent dosage 0.08%

[0085] MMT dosage 4.23%

[0086] The dosage of initiator is 0.47%.

[0087] The rubber powder (RP) was pretreated with concentrated acid for 2 hours, and the acrylic acid (AA) was neutralized to a certain degree of neutralization with alkaline solution. Then add a certain quality of montmorillonite (MMT) and pretreated rubber powder (PRP) into the acrylic acid neutralizing solution, add the initiator and crosslinking agent under the protective atmosphere, shear at high speed, and keep the temperature at 60-80°C React for 3 hours, and dry at 110-130°C to obtain superabsorbent resin. The measured water absorption rate of the product is 986g·g -1 .

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Abstract

Rubber powder / acrylic acid / montmorillonite superabsorbent resin, raw material wt% composition is: acrylic acid 75-88%; rubber powder 7-20%; crosslinking agent 0.05-0.26%; montmorillonite 2.00-10%; initiator 0.25~0.8%. The preparation method is as follows: rubber powder is pretreated with concentrated acid; acrylic acid is neutralized; montmorillonite and pretreated rubber powder are added to acrylic acid neutralization solution; initiator and crosslinking agent are added under protective atmosphere, high-speed shearing, Fully react at a constant temperature of 60-80°C; dry at 110-130°C to obtain a superabsorbent resin. The ability of the invention to absorb deionized water is over 1000g·g-1. Its main raw materials are waste polyethylene film, rubber powder, cheap montmorillonite and acrylic acid, which can recycle industrial resources. It has good economic and environmental benefits.

Description

technical field [0001] The present invention relates to a superabsorbent resin, in particular to a rubber powder / acrylic acid / montmorillonite superabsorbent resin synthesized from waste rubber powder (WRP for short); and the synthesis of the superabsorbent resin method. Background technique [0002] The research and development of super absorbent resin began in the 1960s. After more than 40 years of development and research, its theoretical basis and application technology have undergone tremendous development. Our country started relatively late. In 1982, superabsorbent resin was synthesized for the first time. It was not until 1988 that the first patent was obtained. There are many types of superabsorbent resins. According to the source, there are three main categories: starch, cellulose and synthetic resin. The performance of these series of products is all good, but the raw materials adopted are all regular chemical raw materials, and the cost is relatively high. At ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F253/00C08F2/44C08K3/34C08L51/04
Inventor 李利刘平生沈健周宁琳章峻魏少华
Owner NANJING NORMAL UNIVERSITY
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