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Production method of acrylic polymer resin and products produced thereby

A technology of acrylic acid and manufacturing method, which is applied in the field of preparation of low acrylic acid monomer residue and superabsorbent resin, and can solve problems such as high solution viscosity, aggravated product color, and difficult production

Inactive Publication Date: 2013-05-29
SHANGHAI HUAYI ACRYLIC-ACID CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method can reduce the content of residual acrylic acid monomers in the product to a certain extent, because the polymer additives are added, on the one hand, the viscosity of the solution is high, and it is easy to block the nozzle in the industrial production process, thereby affecting the production. On the other hand, due to the color of the polymer, the color of the prepared product will be aggravated, which is undesirable for users of hygienic materials.

Method used

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  • Production method of acrylic polymer resin and products produced thereby
  • Production method of acrylic polymer resin and products produced thereby

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0090] Gel preparation

[0091] at 1m 3 Add 283 kilograms of sodium hydroxide aqueous solution (32wt%) and 351 kilograms of deionized water in the reaction kettle, start the stirring of the reaction kettle, slowly add 225 kilograms of acrylic acid dropwise, keep the temperature of the reaction kettle at 25 ° C, after the addition of acrylic acid is finished, add 0.5 kg of cross-linking agent polyethylene glycol diacrylate and 0.45 kg of cross-linking agent ethoxyglycerin triacrylate, then add 0.6 kg of ammonium persulfate as a polymerization initiator, continue to stir, the reactor is filled with nitrogen, continue Keeping the temperature of the reactor at 25°C, the above-mentioned materials are continuously fed into a continuous conveyor belt with a length of 6000mm and a width of 500mm at a flow rate of 34.5kg / hr, and two microwave generators (W-8512 model, purchased from Guangdong, China) at the entrance of the polymerization conveyor belt Foshan Fujibao Microwave Produc...

Embodiment 2

[0118] Gel preparation

[0119] at 1m 3 Add 283 kilograms of sodium hydroxide aqueous solution (32wt%) and 351 kilograms of deionized water in the reaction kettle, start the stirring of the reaction kettle, slowly add 225 kilograms of acrylic acid dropwise, keep the temperature of the reaction kettle at 25 ° C, after the addition of acrylic acid is finished, add 0.5 kg of cross-linking agent polyethylene glycol diacrylate and 0.45 kg of cross-linking agent ethoxyglycerin triacrylate, then add 0.6 kg of polymerization initiator ammonium persulfate, continue to stir, nitrogen is carried out to the reactor, and continue to maintain the reaction The temperature of the kettle is 25°C, and the above-mentioned materials are continuously fed into a continuous conveyor belt with a length of 6000mm and a width of 500mm at a flow rate of 34.5kg / hr, and two microwave generators (W-8512 model, purchased from Fuji, Foshan, Guangdong, China) at the entrance of the polymerization conveyor b...

Embodiment 3

[0132] Gel preparation

[0133] at 1m 3Add 283 kilograms of sodium hydroxide aqueous solution (32wt%) and 276 kilograms of deionized water in the reaction kettle, start the stirring of the reaction kettle, slowly add 225 kilograms of acrylic acid dropwise, keep the temperature of the reaction kettle at 25 ° C, after the addition of acrylic acid is finished, add 0.5 kg of cross-linking agent polyethylene glycol diacrylate and 0.45 kg of cross-linking agent ethoxyglycerin triacrylate, then add 0.6 kg of polymerization initiator ammonium persulfate, continue to stir, nitrogen is carried out to the reactor, and continue to maintain the reaction The temperature of the kettle is 25°C, and the above-mentioned materials are continuously fed into a continuous conveyor belt with a length of 6000mm and a width of 500mm at a flow rate of 34.5kg / hr, and two microwave generators (W-8512 model, purchased from Fuji, Foshan, Guangdong, China) at the entrance of the polymerization conveyor be...

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Abstract

The invention discloses a production method of acrylic polymer resin. The production method includes the steps of forming bulky hydrogel of acrylic polymer, granulating and drying. The production method is characterized in that by weight of the bulky hydrogel of acrylic polymer, 6-7% of initiator solution is added to obtain gel granules 15-25mm in diameter; the drying step includes two drying stages, drying in the first stage is at 50-110 DEG C for the duration of 5-20 minutes, and drying the second stage is at 110-180 DEG C for the duration of 10-30 minutes. The invention further discloses products produced by the production method and applications thereof.

Description

technical field [0001] The present invention relates to a method for preparing superabsorbent resin with low residual amount of acrylic acid monomer. The superabsorbent resin prepared by the method of the present invention is especially suitable for such as women's sanitary napkins, baby diapers, adult incontinence products, and hospital disposable beds. Pads and more in the sanitary field. technical background [0002] Acrylic superabsorbent resin is a kind of safe and environment-friendly polymer material, because of its high water absorption and strong water retention, it has been widely used in the field of hygiene. [0003] At present, acrylic superabsorbent resins are widely used in hygienic fields such as women's sanitary napkins, baby diapers, adult incontinence products, and hospital disposable mattresses. Since these products are used in close contact with human skin, the requirements for the content of residual acrylic acid monomers in superabsorbent resin (SAP) ...

Claims

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Application Information

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IPC IPC(8): C08F220/06C08F2/46C08F6/00C08J3/12C08J3/00
Inventor 王月珍陈勇周柳茵连旭罡马建学褚小东
Owner SHANGHAI HUAYI ACRYLIC-ACID CO LTD
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