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Preparation method of foaming type magnesium polyacrylate imbibition resin

A technology of polyacrylic acid magnesium liquid absorption and acrylic acid emulsion, which is applied in the direction of absorbent pads, medical science, bandages, etc., can solve the problems of small increase in liquid absorption rate and pressure absorption, and achieve good surface porosity and dryness , The effect of increasing the liquid absorption rate and increasing the mesh diameter and surface area

Inactive Publication Date: 2007-02-07
FUJIAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because polyacrylate resin mainly absorbs water by water-absorbing groups, the internal mesh structure is dense and the pore size is small, so the increase in liquid absorption rate and pressure absorption is not large.
A large number of patent documents and published research papers have been searched, and no relevant reports have been found on the use of acrylic acid and magnesium hydroxide as base materials, adding composite foaming agents, composite crosslinking agents, and potassium persulfate to make foamable magnesium polyacrylates.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Add 112kg of pure water to 28kg of magnesium hydroxide with a purity of 99.0% to dilute, make 140kg of magnesium hydroxide solution, place it in a 400-liter reactor, start the stirrer, control the stirring speed to 45r / min, and the temperature is 74 ℃, slowly add 65 kg of acrylic acid emulsion with a purity of 99.5%, and stir for 34 minutes to complete the neutralization reaction; mix 0.20 kg of benzenedisulfonyl hydrazide and 0.08 kg of nitrourea to form a composite foaming agent 0.28 kg, and add it to the reaction kettle. Stir for 8 minutes; mix 0.04kg of epichlorohydrin and 0.02kg of methylene bisacrylamide to form a composite crosslinking agent 0.06kg, add it to the reaction kettle, stir for 7 minutes; put it into the pan, add 0.5kg of potassium persulfate , to initiate cross-linking polymerization, control the cross-linking polymerization temperature at 121°C, and cool naturally for 55 minutes after the polymer becomes a gel; place it in an extrusion pelletizer, cut...

Embodiment 2

[0014] Add 136kg of pure water to 34kg of magnesium hydroxide with a purity of 98.5% for dilution, and then make 170kg of magnesium hydroxide solution, place it in a 400-liter reactor, start the stirrer, control the stirring speed to 45r / min, and the temperature is 76 ℃, slowly add 70 kg of acrylic acid emulsion with a purity of 99.7%, and stir for 37 minutes to complete the neutralization reaction; mix 0.30 kg of benzenedisulfonyl hydrazide and 0.18 kg of nitrourea to form a composite foaming agent 0.48 kg, and add it to the reaction kettle. Stir for 9 minutes; mix 0.05kg of epichlorohydrin and 0.03kg of methylene bisacrylamide to form a composite crosslinking agent 0.08kg, add it to the reaction kettle, stir for 8 minutes; put it into the pan, add 0.7kg of potassium persulfate , to initiate cross-linking polymerization, control the cross-linking polymerization temperature at 125°C, and cool naturally for 55 minutes after the polymer becomes a gel; place it in an extrusion pel...

Embodiment 3

[0016] Add 124kg of pure water to 31kg of magnesium hydroxide with a purity of 99.0% for dilution, and then make 155kg of magnesium hydroxide solution. ℃, slowly add 68 kg of acrylic acid emulsion with a purity of 99.3%, and stir for 35 minutes to complete the neutralization reaction; mix 0.26 kg of benzenedisulfonyl hydrazide and 0.13 kg of nitrourea to form a composite foaming agent 0.39 kg, and add it to the reaction kettle. Stir for 8 minutes; mix 0.04kg of epichlorohydrin and 0.03kg of methylene bisacrylamide to form a composite crosslinking agent 0.07kg, add it to the reaction kettle, stir for 8 minutes; put it into the pan, add 0.6kg of potassium persulfate , to initiate cross-linking polymerization, control the cross-linking polymerization temperature at 123°C, and cool naturally for 55 minutes after the polymer becomes a gel; place it in an extrusion pelletizer, cut into φ2.5×3mm pellets, and pass through the fluidized bed After drying at 130°C for 170 minutes, put it...

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Abstract

the invention discloses a preparing method of foaming magnesium polyacrylate imbibition resin, which comprises the following steps: adopting 63-72% acrylic emulsion and 27-36% magnesium hydroxide as raw material; adding compound 0.2-0.5% foamer, 0.04-0.09% crosslinking agent and 0.4-0.8% potassium persulphate; neutralizing; crosslinking; squeezing; drying; breaking; foaming; metering; packing. the compound foamer is composed of benzene disulfonate hydrazide and nitrourea and the compound crosslinking agent is composed of epichlorohydrin and methylene diacrylamide.

Description

technical field [0001] The invention relates to a preparation method of a liquid-absorbing resin, in particular to a preparation method of a foamed magnesium polyacrylate liquid-absorbing resin. Background technique [0002] Polyacrylate resins, including potassium polyacrylate, sodium polyacrylate, and magnesium polyacrylate, are polymer materials with strong water absorption capacity and good water retention and hygienic properties. Therefore, they are increasingly used in baby diapers ( Pants), adult incontinence diapers, women's sanitary napkins, tampons and other health care products are used to replace a large amount of cotton and pulp, making health care products more portable, miniaturized and comfortable. However, since the body excretion fluid (including urine, blood) contains salt, uric acid, hemoglobin and other components, and polyacrylate resins generally have poor salt resistance, the liquid absorption (urine, blood) ratio and pressure absorption The volume i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L33/00C08K5/20C08J3/24C08J9/00C08K3/22A61L15/24
Inventor 张华集张雯肖荔人
Owner FUJIAN NORMAL UNIV
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