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Preparation method of water superabsorbent polyacrylic resin

The technology of polyacrylic acid resin and water-soluble acrylic acid is applied in the field of preparation of high water-absorbing acrylic resin, which can solve the problems such as the influence of working environment and operators, insufficient material feeding, poor comfort, etc., so as to improve water absorption, The effect of increasing the surface area and increasing the rate of water absorption

Inactive Publication Date: 2017-03-15
ZHONGSHAN HENGGUANGYUAN ABSORBENT MATERIAL CO LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0003] At present, the methods of preparing acrylic superabsorbent resin are mainly two technologies: reverse phase suspension polymerization and aqueous solution polymerization, among which the aqueous solution polymerization technology has many advantages such as relatively simple process, environmental protection and pollution-free production process. Occupies more than 90% of the superabsorbent resin market, but the common disadvantage of aqueous solution polymerization technology is that the water absorption speed is slow, resulting in products that are not absorbed in time due to body fluids (urine or menstrual blood) in the early stages of use, resulting in poor comfort. good
In order to increase the absorption rate, some grind the particles finer and increase the specific surface area to increase the speed. However, in this way, it is easy to cause dust to fly during the processing and molding of the finished product. First, it causes material loss. The second is that the amount of raw materials is insufficient, and the third is that it has a great impact on the working environment and operators.

Method used

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  • Preparation method of water superabsorbent polyacrylic resin
  • Preparation method of water superabsorbent polyacrylic resin
  • Preparation method of water superabsorbent polyacrylic resin

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preparation example Construction

[0036] A preparation method of a highly water-absorbent polyacrylic acid resin, which uses acrylic acid, water-soluble acrylate or water-soluble acrylic acid derivatives as polymerization monomers, and obtains a highly water-absorbent polyacrylic acid resin through aqueous solution polymerization; the specific steps are as follows:

[0037] 1) After dissolving the alkaline substance in deionized water, slowly add it to the acrylic acid monomer solution, carry out the neutralization reaction under stirring, and control the reaction temperature to ≤30°C to obtain the neutralization solution;

[0038] 2) Add surfactant, initiator and cross-linking agent respectively to the above-mentioned neutralization solution, stir evenly and then transfer to the belt polymerizer to start the polymerization reaction, and obtain massive elastic gel after the reaction;

[0039] 3) After cutting the massive elastic gel in step 2), transfer it to a belt dryer for drying; obtain the dried granules; ...

Embodiment 1

[0043] A preparation method of a highly water-absorbing polyacrylic acid resin, which uses acrylic acid as a polymerization monomer, and obtains a highly water-absorbing polyacrylic acid resin through aqueous solution polymerization under the action of a surfactant and an initiator; the specific steps are as follows:

[0044] 1) Dissolve the alkaline substance in deionized water and slowly add it to the acrylic acid monomer solution, carry out the neutralization reaction under stirring, and control the reaction temperature to 30°C to obtain the neutralization solution;

[0045] 2) Add a surfactant, an initiator and a crosslinking agent to the above-mentioned neutralizing solution, stir evenly, transfer to a belt polymerizer, and polymerize at a constant temperature at 85° C., and obtain a massive elastic gel after reaction;

[0046] 3) After granulating the massive elastic gel in step 2), transfer it to an airtight belt-type constant temperature dryer for drying at 130° C. to o...

Embodiment 2

[0051] A preparation method of a highly water-absorbent polyacrylic acid resin, which uses sodium acrylate as a polymerization monomer, and obtains a highly water-absorbent polyacrylic acid resin through aqueous solution polymerization under the action of a surfactant and an initiator; the specific steps are as follows:

[0052] 1) Dissolve the alkaline substance in deionized water and slowly add it to the acrylic acid monomer solution, carry out the neutralization reaction under stirring, and control the reaction temperature at 28°C to obtain the neutralization solution;

[0053] 2) Add surfactant, initiator and cross-linking agent respectively to the above neutralization solution, stir evenly and then transfer to belt polymerizer, perform constant temperature polymerization reaction at 90°C for 5 hours to obtain massive elastic gel ;

[0054] 3) Cut the massive elastic gel in step 2) into granules and transfer them to a closed belt type constant temperature dryer for drying ...

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Abstract

The invention discloses a preparation method of a water superabsorbent polyacrylic resin. An acrylic acid, an acrylate or an acrylic acid derivative as a polymerizable monomer undergoes an aqueous solution polymerization reaction under the action of a surfactant and an initiator to produce the superabsorbent polyacrylic resin. Through combination of aqueous solution polymerization and the surfactant, the water superabsorbent polyacrylic resin is obtained. The water superabsorbent polyacrylic resin can effectively improve the lubricity of the gel after polymerization, can be easily chopped and pelleted, does not easily adhere to a device and is conducive to industrial large-scale production. The preparation method effectively increases the specific surface area of the product and improves water absorbency and a water absorption speed of the product. The water superabsorbent polyacrylic resin can be applied to a water or blood adsorption product, and is particularly used in medical and health work-related products such as adult or baby diapers, or sanitary napkins for women, sanitary napkins and sanitary pads.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a preparation method of a superabsorbent acrylic resin. Background technique [0002] Superabsorbent resin is a new type of polymer material, which can absorb hundreds to a thousand times its own weight of water, non-toxic, harmless, and non-polluting; it has extremely strong water absorption capacity and high water retention capacity, and the absorbed water cannot Extruded by simple physical methods, and can release and absorb water repeatedly. In addition to absorbing water, super absorbent resin can also absorb fertilizers and pesticides, and release them slowly to increase fertilizer and drug effects. Due to its superior performance, superabsorbent resins are widely used in agricultural and forestry production, urban landscaping, drought resistance and water retention, and sand prevention and control, and play a huge role. In addition, superabsorbent resins can al...

Claims

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Application Information

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IPC IPC(8): C08F120/06C08F2/10C08F6/00C08J3/24
Inventor 张鲁桂郑雅达柴松锋
Owner ZHONGSHAN HENGGUANGYUAN ABSORBENT MATERIAL CO LTD
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